Updated agent to include ping in heartbeat.

Reviewed-on: #6

.env.example

@@ -0,0 +1,31 @@
+# Django settings
+KEYWARDEN_SECRET_KEY=supersecret
+KEYWARDEN_DEBUG=True
+KEYWARDEN_ALLOWED_HOSTS=*
+KEYWARDEN_TRUSTED_ORIGINS=https://reverse.proxy.domain.xyz,https://127.0.0.1
+KEYWARDEN_DOMAIN=https://example.domain.xyz
+
+# Database
+KEYWARDEN_POSTGRES_DB=keywarden
+KEYWARDEN_POSTGRES_USER=keywarden
+KEYWARDEN_POSTGRES_PASSWORD=postgres
+KEYWARDEN_POSTGRES_HOST=keywarden-db
+KEYWARDEN_POSTGRES_PORT=5432
+
+
+# Admin
+KEYWARDEN_ADMIN_USERNAME=admin
+KEYWARDEN_ADMIN_EMAIL=admin@example.com
+KEYWARDEN_ADMIN_PASSWORD=password
+
+# Auth mode: native | oidc | hybrid
+KEYWARDEN_AUTH_MODE=native
+
+
+# OIDC (optional)
+# KEYWARDEN_OIDC_CLIENT_ID=
+# KEYWARDEN_OIDC_CLIENT_SECRET=
+# KEYWARDEN_OIDC_AUTHORIZATION_ENDPOINT=
+# KEYWARDEN_OIDC_TOKEN_ENDPOINT=
+# KEYWARDEN_OIDC_USER_ENDPOINT=
+# KEYWARDEN_OIDC_JWKS_ENDPOINT=

.gitignore

@@ -218,9 +218,6 @@ __marimo__/
 # Certificates
 *.pem
 
-# Docker
-*compose.yml
-
 nginx/logs/*
 nginx/certs/*.pem
 

API_DOCS.md

@@ -0,0 +1,47 @@
+# API docs
+
+The API v1 interactive documentation is served by Django Ninja at `/api/v1/docs`.
+
+What it provides:
+- Swagger UI for all v1 routes, request/response schemas, and example payloads.
+- Try-it-out support for GET/POST/PATCH/DELETE.
+
+Authentication:
+- Session auth works in the browser, but unsafe requests require CSRF.
+- For API testing, use JWT: add `Authorization: Bearer <access_token>`.
+
+Notes:
+- Base URL for v1 endpoints is `/api/v1`.
+- Admin-only routes return `403 Forbidden` when the token user is not staff/superuser.
+
+Example: update server display name (admin-only)
+
+PATCH `/api/v1/servers/{server_id}`
+
+```json
+{
+  "display_name": "Keywarden Prod"
+}
+```
+
+## SSH user certificates (OpenSSH CA)
+
+Keywarden signs user SSH keys with an OpenSSH certificate authority. The flow is:
+- User uploads a public key (`POST /api/v1/keys`).
+- Server signs the key using the active user CA.
+- Certificate is stored server-side and can be downloaded by the user.
+
+Endpoints:
+- `POST /api/v1/keys/{key_id}/certificate` issues (or re-issues) a certificate.
+- `GET /api/v1/keys/{key_id}/certificate` downloads the certificate.
+- `GET /api/v1/keys/{key_id}/certificate.sha256` downloads a sha256 hash file.
+
+Agent endpoints (mTLS):
+- `GET /api/v1/agent/servers/{server_id}/ssh-ca` returns the CA public key for agent install.
+- `GET /api/v1/agent/servers/{server_id}/accounts` returns account + system username (no raw keys).
+
+Configuration:
+- `KEYWARDEN_USER_CERT_VALIDITY_DAYS` controls certificate lifetime (default: 30 days).
+- `KEYWARDEN_ACCOUNT_USERNAME_TEMPLATE` controls account name derivation.
+
+Note: `ssh-keygen` must be available on the Keywarden server to sign certificates.

Dockerfile

@@ -13,12 +13,18 @@ WORKDIR /app
 # System deps for psycopg2, node (for Tailwind), etc.
 RUN apt-get update && apt-get install -y --no-install-recommends \
     build-essential \
+    ca-certificates \
     libpq-dev \
     curl \
+    openssl \
+    openssh-client \
     nginx \
     nodejs \
     npm \
     supervisor \
+    mkcert \
+    libnss3-tools \
+    valkey-server \
     && rm -rf /var/lib/apt/lists/*
 
 # =============================================
@@ -44,13 +50,13 @@ RUN pip install --upgrade pip \
 WORKDIR /app
 COPY ./app .
 
-COPY nginx/configs/nginx.conf /etc/nginx/nginx.conf
+COPY nginx/configs/nginx.conf.template /etc/nginx/nginx.conf.template
 COPY nginx/configs/options-* /etc/nginx/
 #COPY nginx/configs/sites/ /etc/nginx/conf.d/
 COPY supervisor/supervisord.conf /etc/supervisor/supervisord.conf
 
 RUN python manage.py collectstatic --noinput
-RUN chmod +x /app/entrypoint.sh /app/scripts/gunicorn.sh
+RUN chmod +x /app/entrypoint.sh /app/scripts/gunicorn.sh /app/scripts/daphne.sh
 
 # =============================================
 # 5. Create users for services

LICENSES/valkey.BSD-3-Clause.txt

@@ -0,0 +1,29 @@
+BSD 3-Clause License
+
+Copyright (c) 2024, Valkey contributors
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

THIRD_PARTY_NOTICES.md

@@ -0,0 +1,22 @@
+# Third-party notices
+
+This project is licensed under the GNU AGPL v3. It includes third-party components that
+are distributed under their own licenses. When redistributing Keywarden (source or binary),
+ensure you comply with each component's license terms and include required notices.
+
+## Valkey
+Valkey is included in the container image and used as the cache backend.
+License: BSD 3-Clause. See `LICENSES/valkey.BSD-3-Clause.txt`.
+
+## Other third-party components
+This repository and container image include additional dependencies (Python packages and
+system packages). Their licenses typically require you to retain copyright notices and
+license texts when redistributing binaries. Review the following sources to determine
+exact obligations:
+
+- `requirements.txt` for Python dependencies.
+- `Dockerfile` for system packages installed into the image.
+- `app/static/` and `app/theme/` for bundled frontend assets.
+
+If you need a full license inventory, generate it from your build environment and add
+corresponding license texts under `LICENSES/`.

TODO.md

@@ -0,0 +1,37 @@
+Next steps:
+
+Certificate Generation:
+- User account is created
+- User can input SSH pubkey into profile page
+- Keywarden creates signed SSH Certificate from User's pubkey and Keywarden CA
+
+Grant:
+- User requests access to target server
+- Access request approved
+- User has linux account created and has key / cert trusted by target server
+- User can log into account
+
+Revocation:
+- User has access expire or revoked
+- Keywarden removes key / cert from target server, or invalidates on Keywarden's side
+- Keywarden removes object permissions
+- User cannot access server anymore
+
+
+Permissions:
+
+Administrator:
+- Everything
+
+Auditor:
+- Can exclusively view audit logs of servers they have access to via request.
+
+User:
+
+
+
+Access Requests:
+
+- Can use Shell?
+- Can view logs?
+- Can have user account?

agent/.gitignore

@@ -0,0 +1 @@
+keywarden-agent

agent/README.md

@@ -0,0 +1,27 @@
+TODO: Move to boris/keywarden-agent. In main repo for now for development.
+
+# keywarden-agent
+
+Minimal Go agent for Keywarden.
+
+## Build
+
+```
+go build -o keywarden-agent ./cmd/keywarden-agent
+```
+
+## Run
+
+```
+./keywarden-agent -config /etc/keywarden/agent.json -server-url https://keywarden.example.com -enroll-token <token>
+```
+
+You can also pass `KEYWARDEN_SERVER_URL` and `KEYWARDEN_ENROLL_TOKEN` as environment variables.
+
+## Config
+
+On first boot, the agent will create a config file if it does not exist. Only `server_url` is required for bootstrapping.
+
+If the Keywarden server uses a private TLS CA, set `server_ca_path` (or `KEYWARDEN_SERVER_CA_PATH`) to the CA PEM file so the agent can verify the server certificate.
+
+See `config.example.json`.

agent/cmd/keywarden-agent/main.go

@@ -0,0 +1,278 @@
+package main
+
+import (
+	"context"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/json"
+	"encoding/pem"
+	"flag"
+	"fmt"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"keywarden/agent/internal/client"
+	"keywarden/agent/internal/config"
+	"keywarden/agent/internal/host"
+	"keywarden/agent/internal/logs"
+	"keywarden/agent/internal/version"
+)
+
+func main() {
+	configPath := flag.String("config", config.DefaultConfigPath, "Path to agent config JSON")
+	serverURL := flag.String("server-url", "", "Keywarden server URL (first boot)")
+	enrollToken := flag.String("enroll-token", "", "Enrollment token (first boot)")
+	showVersion := flag.Bool("version", false, "Print version and exit")
+	flag.Parse()
+
+	if *showVersion {
+		fmt.Printf("keywarden-agent %s (commit %s, built %s)\n", version.Version, version.Commit, version.BuildDate)
+		return
+	}
+
+	cfg, err := config.LoadOrInit(*configPath, pickServerURL(*serverURL))
+	if err != nil {
+		log.Fatalf("config error: %v", err)
+	}
+	if err := ensureDirs(cfg); err != nil {
+		log.Fatalf("state dir error: %v", err)
+	}
+
+	if err := bootstrapIfNeeded(cfg, *configPath, pickEnrollToken(*enrollToken)); err != nil {
+		log.Fatalf("bootstrap error: %v", err)
+	}
+
+	apiClient, err := client.New(cfg)
+	if err != nil {
+		log.Fatalf("client error: %v", err)
+	}
+
+	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
+	defer stop()
+
+	interval := time.Duration(cfg.SyncIntervalSeconds) * time.Second
+	log.Printf("keywarden-agent started: server_id=%s interval=%s", cfg.ServerID, interval)
+
+	ticker := time.NewTicker(interval)
+	defer ticker.Stop()
+
+	runOnce(ctx, apiClient, cfg)
+
+	for {
+		select {
+		case <-ctx.Done():
+			log.Printf("shutdown requested")
+			return
+		case <-ticker.C:
+			runOnce(ctx, apiClient, cfg)
+		}
+	}
+}
+
+func runOnce(ctx context.Context, apiClient *client.Client, cfg *config.Config) {
+	if err := reportHost(ctx, apiClient, cfg); err != nil {
+		if client.IsRetriable(err) {
+			log.Printf("host update deferred; will retry: %v", err)
+		} else {
+			log.Printf("host update error: %v", err)
+		}
+	}
+	if err := apiClient.SyncAccounts(ctx, cfg); err != nil {
+		log.Printf("sync accounts error: %v", err)
+	}
+	if err := shipLogs(ctx, apiClient, cfg); err != nil {
+		if client.IsRetriable(err) {
+			log.Printf("log shipping deferred; will retry: %v", err)
+		} else {
+			log.Printf("log shipping error: %v", err)
+		}
+	}
+}
+
+func ensureDirs(cfg *config.Config) error {
+	if err := os.MkdirAll(cfg.StateDir, 0o700); err != nil {
+		return err
+	}
+	if err := os.MkdirAll(cfg.LogSpoolDir(), 0o700); err != nil {
+		return err
+	}
+	return nil
+}
+
+func shipLogs(ctx context.Context, apiClient *client.Client, cfg *config.Config) error {
+	send := func(payload []byte) error {
+		return retry(ctx, []time.Duration{250 * time.Millisecond, time.Second, 2 * time.Second}, func() error {
+			return apiClient.SendLogBatch(ctx, cfg.ServerID, payload)
+		})
+	}
+	if err := logs.DrainSpool(cfg.LogSpoolDir(), send); err != nil {
+		return err
+	}
+
+	cursor, err := logs.ReadCursor(cfg.LogCursorPath())
+	if err != nil {
+		return err
+	}
+	collector := logs.NewCollector()
+	events, nextCursor, err := collector.Collect(ctx, cursor, cfg.LogBatchSize)
+	if err != nil {
+		return err
+	}
+	if len(events) == 0 {
+		return nil
+	}
+	payload, err := json.Marshal(events)
+	if err != nil {
+		return err
+	}
+	if err := send(payload); err != nil {
+		if spoolErr := logs.SaveSpool(cfg.LogSpoolDir(), payload); spoolErr != nil {
+			return spoolErr
+		}
+		return err
+	}
+	if err := logs.WriteCursor(cfg.LogCursorPath(), nextCursor); err != nil {
+		return err
+	}
+	return nil
+}
+
+func reportHost(ctx context.Context, apiClient *client.Client, cfg *config.Config) error {
+	info := host.Detect()
+	var pingPtr *int
+	if pingMs, err := apiClient.Ping(ctx); err == nil {
+		pingPtr = &pingMs
+	}
+	return retry(ctx, []time.Duration{250 * time.Millisecond, time.Second, 2 * time.Second}, func() error {
+		return apiClient.UpdateHost(ctx, cfg.ServerID, client.HeartbeatRequest{
+			Host:   info.Hostname,
+			IPv4:   info.IPv4,
+			IPv6:   info.IPv6,
+			PingMs: pingPtr,
+		})
+	})
+}
+
+func pickServerURL(flagValue string) string {
+	if flagValue != "" {
+		return flagValue
+	}
+	return os.Getenv("KEYWARDEN_SERVER_URL")
+}
+
+func pickEnrollToken(flagValue string) string {
+	if flagValue != "" {
+		return flagValue
+	}
+	return os.Getenv("KEYWARDEN_ENROLL_TOKEN")
+}
+
+func bootstrapIfNeeded(cfg *config.Config, configPath string, enrollToken string) error {
+	if cfg.ServerID != "" && fileExists(cfg.ClientCertPath()) && fileExists(cfg.CACertPath()) {
+		return nil
+	}
+	if enrollToken == "" {
+		return fmt.Errorf("missing enrollment token; set KEYWARDEN_ENROLL_TOKEN or -enroll-token")
+	}
+	keyPath := cfg.ClientKeyPath()
+	if !fileExists(keyPath) {
+		if err := generateKey(keyPath); err != nil {
+			return err
+		}
+	}
+	csrPEM, err := buildCSR(keyPath)
+	if err != nil {
+		return err
+	}
+	info := host.Detect()
+	hostname := info.Hostname
+	resp, err := client.Enroll(context.Background(), cfg.ServerURL, client.EnrollRequest{
+		Token:  enrollToken,
+		CSRPEM: csrPEM,
+		Host:   hostname,
+		IPv4:   info.IPv4,
+		IPv6:   info.IPv6,
+	})
+	if err != nil {
+		return err
+	}
+	if err := os.WriteFile(cfg.ClientCertPath(), []byte(resp.ClientCert), 0o600); err != nil {
+		return err
+	}
+	if err := os.WriteFile(cfg.CACertPath(), []byte(resp.CACert), 0o600); err != nil {
+		return err
+	}
+	cfg.ServerID = resp.ServerID
+	if err := config.Save(configPath, cfg); err != nil {
+		return err
+	}
+	return nil
+}
+
+func retry(ctx context.Context, delays []time.Duration, fn func() error) error {
+	var lastErr error
+	for attempt := 0; attempt <= len(delays); attempt++ {
+		if attempt > 0 {
+			if !client.IsRetriable(lastErr) {
+				return lastErr
+			}
+			select {
+			case <-ctx.Done():
+				return ctx.Err()
+			case <-time.After(delays[attempt-1]):
+			}
+		}
+		if err := fn(); err != nil {
+			lastErr = err
+			continue
+		}
+		return nil
+	}
+	return lastErr
+}
+
+func generateKey(path string) error {
+	key, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		return err
+	}
+	keyDER := x509.MarshalPKCS1PrivateKey(key)
+	block := &pem.Block{Type: "RSA PRIVATE KEY", Bytes: keyDER}
+	data := pem.EncodeToMemory(block)
+	return os.WriteFile(path, data, 0o600)
+}
+
+func buildCSR(keyPath string) (string, error) {
+	keyData, err := os.ReadFile(keyPath)
+	if err != nil {
+		return "", err
+	}
+	block, _ := pem.Decode(keyData)
+	if block == nil || block.Type != "RSA PRIVATE KEY" {
+		return "", fmt.Errorf("invalid private key")
+	}
+	key, err := x509.ParsePKCS1PrivateKey(block.Bytes)
+	if err != nil {
+		return "", err
+	}
+	csrTemplate := &x509.CertificateRequest{Subject: pkix.Name{CommonName: "keywarden-agent"}}
+	csrDER, err := x509.CreateCertificateRequest(rand.Reader, csrTemplate, key)
+	if err != nil {
+		return "", err
+	}
+	csrBlock := &pem.Block{Type: "CERTIFICATE REQUEST", Bytes: csrDER}
+	return string(pem.EncodeToMemory(csrBlock)), nil
+}
+
+func fileExists(path string) bool {
+	info, err := os.Stat(path)
+	if err != nil {
+		return false
+	}
+	return !info.IsDir()
+}

agent/config.example.json

@@ -0,0 +1,15 @@
+{
+  "server_url": "https://keywarden.dev.ntbx.io/api/v1",
+  "server_id": "4",
+  "server_ca_path": "",
+  "sync_interval_seconds": 5,
+  "log_batch_size": 500,
+  "state_dir": "/var/lib/keywarden-agent",
+  "account_policy": {
+    "username_template": "{{username}}_{{user_id}}",
+    "default_shell": "/bin/bash",
+    "admin_group": "sudo",
+    "create_home": true,
+    "lock_on_revoke": true
+  }
+}

agent/go.mod

@@ -0,0 +1,7 @@
+module keywarden/agent
+
+go 1.22
+
+require (
+	github.com/coreos/go-systemd/v22 v22.5.0
+)

agent/go.sum

@@ -0,0 +1,3 @@
+github.com/coreos/go-systemd/v22 v22.5.0 h1:RrqgGjYQKalulkV8NGVIfkXQf6YYmOyiJKk8iXXhfZs=
+github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
+github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=

agent/internal/accounts/sync.go

@@ -0,0 +1,496 @@
+package accounts
+
+import (
+	"bufio"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strconv"
+	"strings"
+
+	"keywarden/agent/internal/config"
+)
+
+const (
+	stateFileName     = "accounts.json"
+	maxUsernameLen    = 32
+	passwdFilePath    = "/etc/passwd"
+	groupFilePath     = "/etc/group"
+	sshDirName        = ".ssh"
+	authKeysName      = "authorized_keys"
+	keywardenGroup    = "keywarden"
+	userCAPath        = "/etc/ssh/keywarden_user_ca.pub"
+	sshdConfigDropDir = "/etc/ssh/sshd_config.d"
+	sshdConfigDropIn  = "/etc/ssh/sshd_config.d/keywarden.conf"
+	sshdConfigPath    = "/etc/ssh/sshd_config"
+)
+
+type AccessUser struct {
+	UserID         int
+	Username       string
+	Email          string
+	SystemUsername string
+}
+
+type ReportAccount struct {
+	UserID     int    `json:"user_id"`
+	SystemUser string `json:"system_username"`
+	Present    bool   `json:"present"`
+}
+
+type Result struct {
+	Applied  int
+	Revoked  int
+	Accounts []ReportAccount
+}
+
+type managedAccount struct {
+	UserID     int    `json:"user_id"`
+	SystemUser string `json:"system_username"`
+}
+
+type state struct {
+	Users map[string]managedAccount `json:"users"`
+}
+
+type passwdEntry struct {
+	UID  int
+	GID  int
+	Home string
+}
+
+func Sync(policy config.AccountPolicy, stateDir string, users []AccessUser) (Result, error) {
+	result := Result{}
+	statePath := filepath.Join(stateDir, stateFileName)
+	current, err := loadState(statePath)
+	if err != nil {
+		return result, err
+	}
+
+	desired := make(map[int]managedAccount, len(users))
+	for _, user := range users {
+		systemUser := user.SystemUsername
+		if strings.TrimSpace(systemUser) == "" {
+			systemUser = renderUsername(policy.UsernameTemplate, user.Username, user.UserID)
+		}
+		desired[user.UserID] = managedAccount{UserID: user.UserID, SystemUser: systemUser}
+	}
+
+	var syncErr error
+	if err := ensureGroup(keywardenGroup); err != nil && syncErr == nil {
+		syncErr = err
+	}
+	for _, account := range current.Users {
+		if _, ok := desired[account.UserID]; ok {
+			continue
+		}
+		if err := revokeUser(account.SystemUser, policy); err != nil && syncErr == nil {
+			syncErr = err
+		}
+		result.Revoked++
+	}
+
+	for userID, account := range desired {
+		present, err := ensureAccount(account.SystemUser, policy)
+		if err != nil && syncErr == nil {
+			syncErr = err
+		}
+		if present {
+			result.Applied++
+		}
+		result.Accounts = append(result.Accounts, ReportAccount{
+			UserID:     userID,
+			SystemUser: account.SystemUser,
+			Present:    present,
+		})
+	}
+
+	if err := saveState(statePath, desired); err != nil && syncErr == nil {
+		syncErr = err
+	}
+	return result, syncErr
+}
+
+func loadState(path string) (state, error) {
+	st := state{Users: map[string]managedAccount{}}
+	data, err := os.ReadFile(path)
+	if err != nil {
+		if errors.Is(err, os.ErrNotExist) {
+			return st, nil
+		}
+		return st, fmt.Errorf("read state: %w", err)
+	}
+	if err := json.Unmarshal(data, &st); err != nil {
+		return st, fmt.Errorf("parse state: %w", err)
+	}
+	if st.Users == nil {
+		st.Users = map[string]managedAccount{}
+	}
+	return st, nil
+}
+
+func saveState(path string, desired map[int]managedAccount) error {
+	st := state{Users: map[string]managedAccount{}}
+	for id, account := range desired {
+		st.Users[strconv.Itoa(id)] = account
+	}
+	data, err := json.MarshalIndent(st, "", "  ")
+	if err != nil {
+		return fmt.Errorf("encode state: %w", err)
+	}
+	if err := os.MkdirAll(filepath.Dir(path), 0o700); err != nil {
+		return fmt.Errorf("create state dir: %w", err)
+	}
+	if err := os.WriteFile(path, data, 0o600); err != nil {
+		return fmt.Errorf("write state: %w", err)
+	}
+	return nil
+}
+
+func renderUsername(template string, username string, userID int) string {
+	raw := strings.ReplaceAll(template, "{{username}}", username)
+	raw = strings.ReplaceAll(raw, "{{user_id}}", strconv.Itoa(userID))
+	clean := sanitizeUsername(raw)
+	if len(clean) > maxUsernameLen {
+		clean = clean[:maxUsernameLen]
+	}
+	if clean == "" {
+		clean = fmt.Sprintf("kw_%d", userID)
+	}
+	return clean
+}
+
+func sanitizeUsername(raw string) string {
+	raw = strings.ToLower(raw)
+	var b strings.Builder
+	b.Grow(len(raw))
+	for _, r := range raw {
+		if (r >= 'a' && r <= 'z') || (r >= '0' && r <= '9') || r == '_' || r == '-' {
+			b.WriteRune(r)
+			continue
+		}
+		b.WriteByte('_')
+	}
+	out := strings.Trim(b.String(), "-_")
+	if out == "" {
+		return ""
+	}
+	if strings.HasPrefix(out, "-") {
+		return "kw" + out
+	}
+	return out
+}
+
+func userExists(username string) (bool, error) {
+	cmd := exec.Command("id", "-u", username)
+	if err := cmd.Run(); err != nil {
+		if _, ok := err.(*exec.ExitError); ok {
+			return false, nil
+		}
+		return false, err
+	}
+	return true, nil
+}
+
+func ensureAccount(username string, policy config.AccountPolicy) (bool, error) {
+	exists, err := userExists(username)
+	if err != nil {
+		return false, err
+	}
+	if !exists {
+		if err := createUser(username, policy); err != nil {
+			return false, err
+		}
+	}
+	if err := ensureGroupMembership(username, keywardenGroup); err != nil {
+		return true, err
+	}
+	if err := enforceCertificateOnly(username, policy); err != nil {
+		return true, err
+	}
+	if err := writeAuthorizedKeys(username, nil); err != nil {
+		return true, err
+	}
+	return true, nil
+}
+
+func createUser(username string, policy config.AccountPolicy) error {
+	args := []string{"-U", "-G", keywardenGroup}
+	if policy.CreateHome {
+		args = append(args, "-m")
+	} else {
+		args = append(args, "-M")
+	}
+	if policy.DefaultShell != "" {
+		args = append(args, "-s", policy.DefaultShell)
+	}
+	args = append(args, username)
+	cmd := exec.Command("useradd", args...)
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("useradd %s: %w", username, err)
+	}
+	return nil
+}
+
+func enforceCertificateOnly(username string, policy config.AccountPolicy) error {
+	cmd := exec.Command("usermod", "-L", username)
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("lock account %s: %w", username, err)
+	}
+	if policy.DefaultShell != "" {
+		shellCmd := exec.Command("usermod", "-s", policy.DefaultShell, username)
+		if err := shellCmd.Run(); err != nil {
+			return fmt.Errorf("set shell %s: %w", username, err)
+		}
+	}
+	expiryCmd := exec.Command("chage", "-E", "-1", username)
+	if err := expiryCmd.Run(); err != nil {
+		return fmt.Errorf("clear expiry %s: %w", username, err)
+	}
+	return nil
+}
+
+func revokeUser(username string, policy config.AccountPolicy) error {
+	exists, err := userExists(username)
+	if err != nil {
+		return err
+	}
+	if !exists {
+		return nil
+	}
+	var revokeErr error
+	if policy.LockOnRevoke {
+		if err := disableAccount(username); err != nil {
+			revokeErr = err
+		}
+	}
+	if err := writeAuthorizedKeys(username, nil); err != nil && revokeErr == nil {
+		revokeErr = err
+	}
+	return revokeErr
+}
+
+func disableAccount(username string) error {
+	cmd := exec.Command("usermod", "-L", username)
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("lock account %s: %w", username, err)
+	}
+	expiryCmd := exec.Command("chage", "-E", "0", username)
+	if err := expiryCmd.Run(); err != nil {
+		return fmt.Errorf("expire account %s: %w", username, err)
+	}
+	return nil
+}
+
+func ensureGroup(name string) error {
+	exists, err := groupExists(name)
+	if err != nil {
+		return err
+	}
+	if exists {
+		return nil
+	}
+	cmd := exec.Command("groupadd", name)
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("groupadd %s: %w", name, err)
+	}
+	return nil
+}
+
+func groupExists(name string) (bool, error) {
+	file, err := os.Open(groupFilePath)
+	if err != nil {
+		return false, fmt.Errorf("open group file: %w", err)
+	}
+	defer file.Close()
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		line := scanner.Text()
+		if line == "" || strings.HasPrefix(line, "#") {
+			continue
+		}
+		fields := strings.SplitN(line, ":", 4)
+		if len(fields) < 1 {
+			continue
+		}
+		if fields[0] == name {
+			return true, nil
+		}
+	}
+	if err := scanner.Err(); err != nil {
+		return false, fmt.Errorf("scan group file: %w", err)
+	}
+	return false, nil
+}
+
+func ensureGroupMembership(username string, group string) error {
+	cmd := exec.Command("usermod", "-a", "-G", group, username)
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("usermod add %s to %s: %w", username, group, err)
+	}
+	return nil
+}
+
+func EnsureCA(publicKey string) error {
+	key := strings.TrimSpace(publicKey)
+	if key == "" {
+		return errors.New("user CA public key required")
+	}
+	changed, err := writeCAKeyIfChanged(key)
+	if err != nil {
+		return err
+	}
+	configChanged, err := ensureSSHDConfig()
+	if err != nil {
+		return err
+	}
+	if changed || configChanged {
+		if err := reloadSSHD(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func writeCAKeyIfChanged(key string) (bool, error) {
+	if data, err := os.ReadFile(userCAPath); err == nil {
+		if strings.TrimSpace(string(data)) == key {
+			return false, nil
+		}
+	} else if !errors.Is(err, os.ErrNotExist) {
+		return false, fmt.Errorf("read user CA key: %w", err)
+	}
+	if err := os.WriteFile(userCAPath, []byte(key+"\n"), 0o644); err != nil {
+		return false, fmt.Errorf("write user CA key: %w", err)
+	}
+	return true, nil
+}
+
+func ensureSSHDConfig() (bool, error) {
+	content := fmt.Sprintf(
+		"TrustedUserCAKeys %s\nMatch Group %s\n    AuthorizedKeysFile none\n    PasswordAuthentication no\n    ChallengeResponseAuthentication no\n",
+		userCAPath,
+		keywardenGroup,
+	)
+	if info, err := os.Stat(sshdConfigDropDir); err == nil && info.IsDir() {
+		if existing, err := os.ReadFile(sshdConfigDropIn); err == nil {
+			if string(existing) == content {
+				return false, nil
+			}
+		}
+		if err := os.WriteFile(sshdConfigDropIn, []byte(content), 0o644); err != nil {
+			return false, fmt.Errorf("write sshd drop-in: %w", err)
+		}
+		return true, nil
+	}
+	data, err := os.ReadFile(sshdConfigPath)
+	if err != nil {
+		return false, fmt.Errorf("read sshd config: %w", err)
+	}
+	if strings.Contains(string(data), "TrustedUserCAKeys "+userCAPath) {
+		return false, nil
+	}
+	updated := string(data)
+	if !strings.HasSuffix(updated, "\n") {
+		updated += "\n"
+	}
+	updated += "\n# Keywarden managed users\n" + content
+	if err := os.WriteFile(sshdConfigPath, []byte(updated), 0o644); err != nil {
+		return false, fmt.Errorf("write sshd config: %w", err)
+	}
+	return true, nil
+}
+
+func reloadSSHD() error {
+	if path, _ := exec.LookPath("systemctl"); path != "" {
+		if err := exec.Command("systemctl", "reload", "sshd").Run(); err == nil {
+			return nil
+		}
+		if err := exec.Command("systemctl", "reload", "ssh").Run(); err == nil {
+			return nil
+		}
+	}
+	if path, _ := exec.LookPath("service"); path != "" {
+		if err := exec.Command("service", "sshd", "reload").Run(); err == nil {
+			return nil
+		}
+		if err := exec.Command("service", "ssh", "reload").Run(); err == nil {
+			return nil
+		}
+	}
+	return errors.New("unable to reload sshd")
+}
+
+func writeAuthorizedKeys(username string, keys []string) error {
+	entry, err := lookupUser(username)
+	if err != nil {
+		return err
+	}
+	if entry.Home == "" {
+		return fmt.Errorf("missing home dir for %s", username)
+	}
+	sshDir := filepath.Join(entry.Home, sshDirName)
+	if err := os.MkdirAll(sshDir, 0o700); err != nil {
+		return fmt.Errorf("mkdir %s: %w", sshDir, err)
+	}
+	if err := os.Chmod(sshDir, 0o700); err != nil {
+		return fmt.Errorf("chmod %s: %w", sshDir, err)
+	}
+	if err := os.Chown(sshDir, entry.UID, entry.GID); err != nil {
+		return fmt.Errorf("chown %s: %w", sshDir, err)
+	}
+	authKeysPath := filepath.Join(sshDir, authKeysName)
+	payload := strings.TrimSpace(strings.Join(keys, "\n"))
+	if payload != "" {
+		payload += "\n"
+	}
+	if err := os.WriteFile(authKeysPath, []byte(payload), 0o600); err != nil {
+		return fmt.Errorf("write %s: %w", authKeysPath, err)
+	}
+	if err := os.Chown(authKeysPath, entry.UID, entry.GID); err != nil {
+		return fmt.Errorf("chown %s: %w", authKeysPath, err)
+	}
+	return nil
+}
+
+func lookupUser(username string) (passwdEntry, error) {
+	file, err := os.Open(passwdFilePath)
+	if err != nil {
+		return passwdEntry{}, fmt.Errorf("open passwd: %w", err)
+	}
+	defer file.Close()
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		line := scanner.Text()
+		if line == "" || strings.HasPrefix(line, "#") {
+			continue
+		}
+		fields := strings.SplitN(line, ":", 7)
+		if len(fields) < 7 {
+			continue
+		}
+		if fields[0] != username {
+			continue
+		}
+		uid, err := strconv.Atoi(fields[2])
+		if err != nil {
+			return passwdEntry{}, fmt.Errorf("parse uid for %s: %w", username, err)
+		}
+		gid, err := strconv.Atoi(fields[3])
+		if err != nil {
+			return passwdEntry{}, fmt.Errorf("parse gid for %s: %w", username, err)
+		}
+		return passwdEntry{
+			UID:  uid,
+			GID:  gid,
+			Home: fields[5],
+		}, nil
+	}
+	if err := scanner.Err(); err != nil {
+		return passwdEntry{}, fmt.Errorf("scan passwd: %w", err)
+	}
+	return passwdEntry{}, fmt.Errorf("user %s not found", username)
+}

agent/internal/client/client.go

@@ -0,0 +1,382 @@
+package client
+
+import (
+	"bytes"
+	"context"
+	"crypto/tls"
+	"crypto/x509"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net"
+	"net/http"
+	"net/url"
+	"os"
+	"strings"
+	"time"
+
+	"keywarden/agent/internal/accounts"
+	"keywarden/agent/internal/config"
+)
+
+const defaultTimeout = 15 * time.Second
+
+type Client struct {
+	baseURL string
+	http    *http.Client
+	tlsCfg  *tls.Config
+	scheme  string
+	host    string
+	addr    string
+}
+
+func New(cfg *config.Config) (*Client, error) {
+	baseURL := strings.TrimRight(cfg.ServerURL, "/")
+	if baseURL == "" {
+		return nil, errors.New("server url is required")
+	}
+	cert, err := tls.LoadX509KeyPair(cfg.ClientCertPath(), cfg.ClientKeyPath())
+	if err != nil {
+		return nil, fmt.Errorf("load client cert: %w", err)
+	}
+	caPool, err := x509.SystemCertPool()
+	if err != nil || caPool == nil {
+		caPool = x509.NewCertPool()
+	}
+	if cfg.ServerCAPath != "" {
+		caData, err := os.ReadFile(cfg.ServerCAPath)
+		if err != nil {
+			return nil, fmt.Errorf("read server ca cert: %w", err)
+		}
+		if !caPool.AppendCertsFromPEM(caData) {
+			return nil, errors.New("parse server ca cert")
+		}
+	}
+
+	tlsConfig := &tls.Config{
+		Certificates: []tls.Certificate{cert},
+		RootCAs:      caPool,
+		MinVersion:   tls.VersionTLS12,
+	}
+
+	transport := &http.Transport{
+		TLSClientConfig: tlsConfig,
+	}
+
+	httpClient := &http.Client{
+		Timeout:   defaultTimeout,
+		Transport: transport,
+	}
+
+	parsed, err := url.Parse(baseURL)
+	if err != nil {
+		return nil, fmt.Errorf("parse server url: %w", err)
+	}
+	if parsed.Host == "" {
+		return nil, errors.New("server url missing host")
+	}
+	scheme := parsed.Scheme
+	if scheme == "" {
+		scheme = "https"
+	}
+	host := parsed.Hostname()
+	port := parsed.Port()
+	if port == "" {
+		if scheme == "http" {
+			port = "80"
+		} else {
+			port = "443"
+		}
+	}
+	addr := net.JoinHostPort(host, port)
+
+	return &Client{
+		baseURL: baseURL,
+		http:    httpClient,
+		tlsCfg:  tlsConfig,
+		scheme:  scheme,
+		host:    host,
+		addr:    addr,
+	}, nil
+}
+
+type EnrollRequest struct {
+	Token   string `json:"token"`
+	CSRPEM  string `json:"csr_pem"`
+	Host    string `json:"host"`
+	IPv4    string `json:"ipv4,omitempty"`
+	IPv6    string `json:"ipv6,omitempty"`
+	AgentID string `json:"agent_id,omitempty"`
+}
+
+type EnrollResponse struct {
+	ServerID    string `json:"server_id"`
+	ClientCert  string `json:"client_cert_pem"`
+	CACert      string `json:"ca_cert_pem"`
+	SyncProfile string `json:"sync_profile,omitempty"`
+	DisplayName string `json:"display_name,omitempty"`
+}
+
+type AccountKey struct {
+	PublicKey   string `json:"public_key"`
+	Fingerprint string `json:"fingerprint"`
+}
+
+type AccountAccess struct {
+	UserID         int          `json:"user_id"`
+	Username       string       `json:"username"`
+	Email          string       `json:"email"`
+	SystemUsername string       `json:"system_username"`
+	Keys           []AccountKey `json:"keys"`
+}
+
+type UserCAResponse struct {
+	PublicKey   string `json:"public_key"`
+	Fingerprint string `json:"fingerprint"`
+}
+
+type AccountSyncEntry struct {
+	UserID         int    `json:"user_id"`
+	SystemUsername string `json:"system_username"`
+	Present        bool   `json:"present"`
+}
+
+type SyncReportRequest struct {
+	AppliedCount int                `json:"applied_count"`
+	RevokedCount int                `json:"revoked_count"`
+	Message      string             `json:"message,omitempty"`
+	Metadata     map[string]any     `json:"metadata,omitempty"`
+	Accounts     []AccountSyncEntry `json:"accounts,omitempty"`
+}
+
+func Enroll(ctx context.Context, serverURL string, req EnrollRequest) (*EnrollResponse, error) {
+	baseURL := strings.TrimRight(serverURL, "/")
+	if baseURL == "" {
+		return nil, errors.New("server url is required")
+	}
+	body, err := json.Marshal(req)
+	if err != nil {
+		return nil, fmt.Errorf("encode enroll request: %w", err)
+	}
+	httpClient := &http.Client{Timeout: defaultTimeout}
+	httpReq, err := http.NewRequestWithContext(ctx, http.MethodPost, baseURL+"/agent/enroll", bytes.NewReader(body))
+	if err != nil {
+		return nil, fmt.Errorf("build enroll request: %w", err)
+	}
+	httpReq.Header.Set("Content-Type", "application/json")
+	resp, err := httpClient.Do(httpReq)
+	if err != nil {
+		return nil, fmt.Errorf("enroll request: %w", err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("enroll failed: status %s", resp.Status)
+	}
+	var out EnrollResponse
+	if err := json.NewDecoder(resp.Body).Decode(&out); err != nil {
+		return nil, fmt.Errorf("decode enroll response: %w", err)
+	}
+	if out.ServerID == "" || out.ClientCert == "" || out.CACert == "" {
+		return nil, errors.New("enroll response missing required fields")
+	}
+	return &out, nil
+}
+
+func (c *Client) SyncAccounts(ctx context.Context, cfg *config.Config) error {
+	if cfg == nil {
+		return errors.New("config required for account sync")
+	}
+	ca, err := c.FetchUserCA(ctx, cfg.ServerID)
+	if err != nil {
+		return err
+	}
+	if err := accounts.EnsureCA(ca.PublicKey); err != nil {
+		return err
+	}
+	users, err := c.FetchAccountAccess(ctx, cfg.ServerID)
+	if err != nil {
+		return err
+	}
+	accessUsers := make([]accounts.AccessUser, 0, len(users))
+	for _, user := range users {
+		accessUsers = append(accessUsers, accounts.AccessUser{
+			UserID:         user.UserID,
+			Username:       user.Username,
+			Email:          user.Email,
+			SystemUsername: user.SystemUsername,
+		})
+	}
+	result, syncErr := accounts.Sync(cfg.AccountPolicy, cfg.StateDir, accessUsers)
+	report := SyncReportRequest{
+		AppliedCount: result.Applied,
+		RevokedCount: result.Revoked,
+		Accounts:     make([]AccountSyncEntry, 0, len(result.Accounts)),
+	}
+	for _, account := range result.Accounts {
+		report.Accounts = append(report.Accounts, AccountSyncEntry{
+			UserID:         account.UserID,
+			SystemUsername: account.SystemUser,
+			Present:        account.Present,
+		})
+	}
+	if syncErr != nil {
+		report.Message = syncErr.Error()
+	}
+	if err := c.SendSyncReport(ctx, cfg.ServerID, report); err != nil {
+		if syncErr != nil {
+			return fmt.Errorf("sync report failed: %w (sync error: %v)", err, syncErr)
+		}
+		return err
+	}
+	return syncErr
+}
+
+func (c *Client) FetchAccountAccess(ctx context.Context, serverID string) ([]AccountAccess, error) {
+	req, err := http.NewRequestWithContext(
+		ctx,
+		http.MethodGet,
+		c.baseURL+"/agent/servers/"+serverID+"/accounts",
+		nil,
+	)
+	if err != nil {
+		return nil, fmt.Errorf("build account access request: %w", err)
+	}
+	resp, err := c.http.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("fetch account access: %w", err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode >= 300 {
+		return nil, &HTTPStatusError{StatusCode: resp.StatusCode, Status: resp.Status}
+	}
+	var out []AccountAccess
+	if err := json.NewDecoder(resp.Body).Decode(&out); err != nil {
+		return nil, fmt.Errorf("decode account access: %w", err)
+	}
+	return out, nil
+}
+
+func (c *Client) FetchUserCA(ctx context.Context, serverID string) (*UserCAResponse, error) {
+	req, err := http.NewRequestWithContext(
+		ctx,
+		http.MethodGet,
+		c.baseURL+"/agent/servers/"+serverID+"/ssh-ca",
+		nil,
+	)
+	if err != nil {
+		return nil, fmt.Errorf("build user ca request: %w", err)
+	}
+	resp, err := c.http.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("fetch user ca: %w", err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode >= 300 {
+		return nil, &HTTPStatusError{StatusCode: resp.StatusCode, Status: resp.Status}
+	}
+	var out UserCAResponse
+	if err := json.NewDecoder(resp.Body).Decode(&out); err != nil {
+		return nil, fmt.Errorf("decode user ca: %w", err)
+	}
+	if strings.TrimSpace(out.PublicKey) == "" {
+		return nil, errors.New("user ca missing public key")
+	}
+	return &out, nil
+}
+
+func (c *Client) SendSyncReport(ctx context.Context, serverID string, report SyncReportRequest) error {
+	body, err := json.Marshal(report)
+	if err != nil {
+		return fmt.Errorf("encode sync report: %w", err)
+	}
+	req, err := http.NewRequestWithContext(
+		ctx,
+		http.MethodPost,
+		c.baseURL+"/agent/servers/"+serverID+"/sync-report",
+		bytes.NewReader(body),
+	)
+	if err != nil {
+		return fmt.Errorf("build sync report: %w", err)
+	}
+	req.Header.Set("Content-Type", "application/json")
+	resp, err := c.http.Do(req)
+	if err != nil {
+		return fmt.Errorf("send sync report: %w", err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode >= 300 {
+		return &HTTPStatusError{StatusCode: resp.StatusCode, Status: resp.Status}
+	}
+	return nil
+}
+
+func (c *Client) SendLogBatch(ctx context.Context, serverID string, payload []byte) error {
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, c.baseURL+"/agent/servers/"+serverID+"/logs", bytes.NewReader(payload))
+	if err != nil {
+		return fmt.Errorf("build log request: %w", err)
+	}
+	req.Header.Set("Content-Type", "application/json")
+	resp, err := c.http.Do(req)
+	if err != nil {
+		return fmt.Errorf("send log batch: %w", err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode >= 300 {
+		return &HTTPStatusError{StatusCode: resp.StatusCode, Status: resp.Status}
+	}
+	return nil
+}
+
+type HeartbeatRequest struct {
+	Host   string `json:"host,omitempty"`
+	IPv4   string `json:"ipv4,omitempty"`
+	IPv6   string `json:"ipv6,omitempty"`
+	PingMs *int   `json:"ping_ms,omitempty"`
+}
+
+func (c *Client) UpdateHost(ctx context.Context, serverID string, reqBody HeartbeatRequest) error {
+	body, err := json.Marshal(reqBody)
+	if err != nil {
+		return fmt.Errorf("encode host update: %w", err)
+	}
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, c.baseURL+"/agent/servers/"+serverID+"/heartbeat", bytes.NewReader(body))
+	if err != nil {
+		return fmt.Errorf("build host update: %w", err)
+	}
+	req.Header.Set("Content-Type", "application/json")
+	resp, err := c.http.Do(req)
+	if err != nil {
+		return fmt.Errorf("send host update: %w", err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode >= 300 {
+		return &HTTPStatusError{StatusCode: resp.StatusCode, Status: resp.Status}
+	}
+	return nil
+}
+
+func (c *Client) Ping(ctx context.Context) (int, error) {
+	if c.addr == "" {
+		return 0, errors.New("server address not configured")
+	}
+	start := time.Now()
+	dialer := &net.Dialer{Timeout: defaultTimeout}
+	if c.scheme == "http" {
+		conn, err := dialer.DialContext(ctx, "tcp", c.addr)
+		if err != nil {
+			return 0, err
+		}
+		_ = conn.Close()
+		return int(time.Since(start).Milliseconds()), nil
+	}
+	cfg := c.tlsCfg.Clone()
+	if cfg.ServerName == "" && c.host != "" {
+		cfg.ServerName = c.host
+	}
+	conn, err := tls.DialWithDialer(dialer, "tcp", c.addr, cfg)
+	if err != nil {
+		return 0, err
+	}
+	_ = conn.Close()
+	return int(time.Since(start).Milliseconds()), nil
+}

agent/internal/client/errors.go

@@ -0,0 +1,36 @@
+package client
+
+import (
+	"context"
+	"errors"
+	"net"
+)
+
+type HTTPStatusError struct {
+	StatusCode int
+	Status     string
+}
+
+func (e *HTTPStatusError) Error() string {
+	return "remote status " + e.Status
+}
+
+func IsRetriable(err error) bool {
+	if err == nil {
+		return false
+	}
+	var statusErr *HTTPStatusError
+	if errors.As(err, &statusErr) {
+		switch statusErr.StatusCode {
+		case 404, 408, 429, 500, 502, 503, 504:
+			return true
+		default:
+			return false
+		}
+	}
+	if errors.Is(err, context.DeadlineExceeded) {
+		return true
+	}
+	var netErr net.Error
+	return errors.As(err, &netErr)
+}

agent/internal/config/config.go

@@ -0,0 +1,152 @@
+package config
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"strings"
+)
+
+const (
+	DefaultConfigPath          = "/etc/keywarden/agent.json"
+	DefaultStateDir            = "/var/lib/keywarden-agent"
+	DefaultSyncIntervalSeconds = 30
+	DefaultLogBatchSize        = 500
+	DefaultUsernameTemplate    = "{{username}}_{{user_id}}"
+	DefaultShell               = "/bin/bash"
+	DefaultAdminGroup          = "sudo"
+)
+
+type AccountPolicy struct {
+	UsernameTemplate string `json:"username_template"`
+	DefaultShell     string `json:"default_shell"`
+	AdminGroup       string `json:"admin_group"`
+	CreateHome       bool   `json:"create_home"`
+	LockOnRevoke     bool   `json:"lock_on_revoke"`
+}
+
+type Config struct {
+	ServerURL           string        `json:"server_url"`
+	ServerID            string        `json:"server_id,omitempty"`
+	ServerCAPath        string        `json:"server_ca_path,omitempty"`
+	SyncIntervalSeconds int           `json:"sync_interval_seconds,omitempty"`
+	LogBatchSize        int           `json:"log_batch_size,omitempty"`
+	StateDir            string        `json:"state_dir,omitempty"`
+	AccountPolicy       AccountPolicy `json:"account_policy,omitempty"`
+}
+
+func LoadOrInit(path string, serverURL string) (*Config, error) {
+	if path == "" {
+		path = DefaultConfigPath
+	}
+	data, err := os.ReadFile(path)
+	if err != nil {
+		if !errors.Is(err, os.ErrNotExist) {
+			return nil, fmt.Errorf("read config: %w", err)
+		}
+		if serverURL == "" {
+			return nil, errors.New("server url required for first boot")
+		}
+		cfg := &Config{ServerURL: serverURL, ServerCAPath: os.Getenv("KEYWARDEN_SERVER_CA_PATH")}
+		applyDefaults(cfg)
+		if err := validate(cfg, false); err != nil {
+			return nil, err
+		}
+		if err := Save(path, cfg); err != nil {
+			return nil, err
+		}
+		return cfg, nil
+	}
+	cfg := &Config{}
+	if err := json.Unmarshal(data, cfg); err != nil {
+		return nil, fmt.Errorf("parse config: %w", err)
+	}
+	if cfg.ServerCAPath == "" {
+		cfg.ServerCAPath = os.Getenv("KEYWARDEN_SERVER_CA_PATH")
+	}
+	applyDefaults(cfg)
+	if err := validate(cfg, false); err != nil {
+		return nil, err
+	}
+	return cfg, nil
+}
+
+func Save(path string, cfg *Config) error {
+	data, err := json.MarshalIndent(cfg, "", "  ")
+	if err != nil {
+		return fmt.Errorf("encode config: %w", err)
+	}
+	if err := os.MkdirAll(dir(path), 0o755); err != nil {
+		return fmt.Errorf("create config dir: %w", err)
+	}
+	if err := os.WriteFile(path, data, 0o600); err != nil {
+		return fmt.Errorf("write config: %w", err)
+	}
+	return nil
+}
+
+func applyDefaults(cfg *Config) {
+	if cfg.SyncIntervalSeconds <= 0 {
+		cfg.SyncIntervalSeconds = DefaultSyncIntervalSeconds
+	}
+	if cfg.LogBatchSize <= 0 {
+		cfg.LogBatchSize = DefaultLogBatchSize
+	}
+	if cfg.StateDir == "" {
+		cfg.StateDir = DefaultStateDir
+	}
+	if cfg.AccountPolicy.UsernameTemplate == "" {
+		cfg.AccountPolicy.UsernameTemplate = DefaultUsernameTemplate
+	}
+	if cfg.AccountPolicy.DefaultShell == "" {
+		cfg.AccountPolicy.DefaultShell = DefaultShell
+	}
+	if cfg.AccountPolicy.AdminGroup == "" {
+		cfg.AccountPolicy.AdminGroup = DefaultAdminGroup
+	}
+}
+
+func validate(cfg *Config, requireServerID bool) error {
+	var missing []string
+	if cfg.ServerURL == "" {
+		missing = append(missing, "server_url")
+	}
+	if requireServerID && cfg.ServerID == "" {
+		missing = append(missing, "server_id")
+	}
+	if len(missing) > 0 {
+		return fmt.Errorf("missing required config fields: %v", missing)
+	}
+	if cfg.SyncIntervalSeconds < 5 {
+		return errors.New("sync_interval_seconds must be >= 5")
+	}
+	return nil
+}
+
+func (c *Config) ClientCertPath() string {
+	return c.StateDir + "/agent.crt"
+}
+
+func (c *Config) ClientKeyPath() string {
+	return c.StateDir + "/agent.key"
+}
+
+func (c *Config) CACertPath() string {
+	return c.StateDir + "/ca.crt"
+}
+
+func (c *Config) LogCursorPath() string {
+	return c.StateDir + "/journal.cursor"
+}
+
+func (c *Config) LogSpoolDir() string {
+	return c.StateDir + "/spool"
+}
+
+func dir(path string) string {
+	if idx := strings.LastIndex(path, string(os.PathSeparator)); idx != -1 {
+		return path[:idx]
+	}
+	return "."
+}

agent/internal/host/host.go

@@ -0,0 +1,57 @@
+package host
+
+import (
+	"net"
+	"os"
+)
+
+type Info struct {
+	Hostname string
+	IPv4     string
+	IPv6     string
+}
+
+func Detect() Info {
+	hostname, _ := os.Hostname()
+	info := Info{Hostname: hostname}
+	ifaces, err := net.Interfaces()
+	if err != nil {
+		return info
+	}
+	for _, iface := range ifaces {
+		if iface.Flags&net.FlagUp == 0 || iface.Flags&net.FlagLoopback != 0 {
+			continue
+		}
+		addrs, err := iface.Addrs()
+		if err != nil {
+			continue
+		}
+		for _, addr := range addrs {
+			var ip net.IP
+			switch v := addr.(type) {
+			case *net.IPNet:
+				ip = v.IP
+			case *net.IPAddr:
+				ip = v.IP
+			default:
+				continue
+			}
+			if ip == nil || ip.IsLoopback() || ip.IsUnspecified() || ip.IsLinkLocalUnicast() || ip.IsLinkLocalMulticast() {
+				continue
+			}
+			if ip4 := ip.To4(); ip4 != nil {
+				if info.IPv4 == "" {
+					info.IPv4 = ip4.String()
+				}
+				continue
+			}
+			if ip.To16() != nil && info.IPv6 == "" {
+				info.IPv6 = ip.String()
+			}
+		}
+		if info.IPv4 != "" && info.IPv6 != "" {
+			break
+		}
+	}
+	return info
+}

agent/internal/logs/collector.go

@@ -0,0 +1,177 @@
+package logs
+
+import (
+	"context"
+	"strings"
+	"time"
+
+	"github.com/coreos/go-systemd/v22/sdjournal"
+)
+
+const defaultLimit = 500
+
+type Collector struct {
+	matches []string
+}
+
+func NewCollector() *Collector {
+	return &Collector{matches: defaultMatches()}
+}
+
+func (c *Collector) Collect(ctx context.Context, cursor string, limit int) ([]Event, string, error) {
+	if limit <= 0 {
+		limit = defaultLimit
+	}
+	j, err := sdjournal.NewJournal()
+	if err != nil {
+		return nil, "", err
+	}
+	defer j.Close()
+
+	for i, match := range c.matches {
+		if i > 0 {
+			if err := j.AddDisjunction(); err != nil {
+				return nil, "", err
+			}
+		}
+		if err := j.AddMatch(match); err != nil {
+			return nil, "", err
+		}
+	}
+
+	if cursor != "" {
+		if err := j.SeekCursor(cursor); err == nil {
+			_, _ = j.Next()
+		}
+	} else {
+		_ = j.SeekTail()
+		_, _ = j.Next()
+	}
+
+	var events []Event
+	var nextCursor string
+	for len(events) < limit {
+		select {
+		case <-ctx.Done():
+			return events, nextCursor, ctx.Err()
+		default:
+		}
+		n, err := j.Next()
+		if err != nil {
+			return events, nextCursor, err
+		}
+		if n == 0 {
+			break
+		}
+		entry, err := j.GetEntry()
+		if err != nil {
+			return events, nextCursor, err
+		}
+		event := fromEntry(entry)
+		events = append(events, event)
+		nextCursor = entry.Cursor
+	}
+
+	return events, nextCursor, nil
+}
+
+func defaultMatches() []string {
+	return []string{
+		"_SYSTEMD_UNIT=sshd.service",
+		"_SYSTEMD_UNIT=sudo.service",
+		"_SYSTEMD_UNIT=systemd-networkd.service",
+		"_SYSTEMD_UNIT=NetworkManager.service",
+		"_SYSTEMD_UNIT=systemd-logind.service",
+		"_TRANSPORT=kernel",
+	}
+}
+
+func fromEntry(entry *sdjournal.JournalEntry) Event {
+	ts := time.Unix(0, int64(entry.RealtimeTimestamp)*int64(time.Microsecond))
+	event := NewEvent(ts)
+	fields := entry.Fields
+	unit := fields["_SYSTEMD_UNIT"]
+	message := fields["MESSAGE"]
+	identifier := fields["SYSLOG_IDENTIFIER"]
+
+	event.Unit = unit
+	event.Message = message
+	event.Priority = fields["PRIORITY"]
+	event.Hostname = fields["_HOSTNAME"]
+	event.Fields = fields
+
+	event.Category = categorize(unit, identifier, fields)
+	event.EventType, event.Username, event.SourceIP, event.SessionID = parseMessage(event.Category, message)
+	if event.EventType == "" {
+		event.EventType = defaultEventType(event.Category)
+	}
+	return event
+}
+
+func categorize(unit string, identifier string, fields map[string]string) string {
+	switch {
+	case unit == "sshd.service" || identifier == "sshd":
+		return "access"
+	case unit == "sudo.service" || identifier == "sudo":
+		return "auth"
+	case unit == "systemd-networkd.service" || identifier == "NetworkManager":
+		return "network"
+	case fields["_TRANSPORT"] == "kernel":
+		return "system"
+	default:
+		return "system"
+	}
+}
+
+func defaultEventType(category string) string {
+	switch category {
+	case "access":
+		return "ssh"
+	case "auth":
+		return "auth"
+	case "network":
+		return "network"
+	default:
+		return "system"
+	}
+}
+
+func parseMessage(category string, msg string) (eventType string, username string, sourceIP string, sessionID string) {
+	if msg == "" {
+		return "", "", "", ""
+	}
+	lower := strings.ToLower(msg)
+	if category == "access" {
+		switch {
+		case strings.Contains(lower, "accepted"):
+			eventType = "ssh.login.success"
+			username = extractBetween(msg, "for ", " from")
+			sourceIP = extractBetween(msg, "from ", " port")
+		case strings.Contains(lower, "failed password"):
+			eventType = "ssh.login.fail"
+			username = extractBetween(msg, "for ", " from")
+			sourceIP = extractBetween(msg, "from ", " port")
+		case strings.Contains(lower, "session opened"):
+			eventType = "ssh.session.open"
+			username = extractBetween(msg, "for user ", " by")
+		case strings.Contains(lower, "session closed"):
+			eventType = "ssh.session.close"
+			username = extractBetween(msg, "for user ", " by")
+		}
+	}
+	return eventType, strings.TrimSpace(username), strings.TrimSpace(sourceIP), strings.TrimSpace(sessionID)
+}
+
+func extractBetween(msg string, start string, end string) string {
+	startIdx := strings.Index(msg, start)
+	if startIdx == -1 {
+		return ""
+	}
+	startIdx += len(start)
+	rest := msg[startIdx:]
+	endIdx := strings.Index(rest, end)
+	if endIdx == -1 {
+		return strings.TrimSpace(rest)
+	}
+	return strings.TrimSpace(rest[:endIdx])
+}

agent/internal/logs/cursor.go

@@ -0,0 +1,24 @@
+package logs
+
+import (
+	"os"
+	"strings"
+)
+
+func ReadCursor(path string) (string, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return "", nil
+		}
+		return "", err
+	}
+	return strings.TrimSpace(string(data)), nil
+}
+
+func WriteCursor(path string, cursor string) error {
+	if cursor == "" {
+		return nil
+	}
+	return os.WriteFile(path, []byte(cursor+"\n"), 0o600)
+}

agent/internal/logs/spool.go

@@ -0,0 +1,53 @@
+package logs
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"sort"
+	"time"
+)
+
+func SaveSpool(dir string, payload []byte) error {
+	if err := os.MkdirAll(dir, 0o700); err != nil {
+		return err
+	}
+	name := fmt.Sprintf("%d.json", time.Now().UnixNano())
+	tmp := filepath.Join(dir, name+".tmp")
+	final := filepath.Join(dir, name)
+	if err := os.WriteFile(tmp, payload, 0o600); err != nil {
+		return err
+	}
+	return os.Rename(tmp, final)
+}
+
+func DrainSpool(dir string, send func([]byte) error) error {
+	entries, err := os.ReadDir(dir)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
+		return err
+	}
+	var files []string
+	for _, entry := range entries {
+		if entry.IsDir() {
+			continue
+		}
+		files = append(files, filepath.Join(dir, entry.Name()))
+	}
+	sort.Strings(files)
+	for _, path := range files {
+		data, err := os.ReadFile(path)
+		if err != nil {
+			return err
+		}
+		if err := send(data); err != nil {
+			return err
+		}
+		if err := os.Remove(path); err != nil {
+			return err
+		}
+	}
+	return nil
+}

agent/internal/logs/types.go

@@ -0,0 +1,23 @@
+package logs
+
+import "time"
+
+type Event struct {
+	Timestamp string            `json:"timestamp"`
+	Category  string            `json:"category"`
+	EventType string            `json:"event_type"`
+	Unit      string            `json:"unit,omitempty"`
+	Priority  string            `json:"priority,omitempty"`
+	Hostname  string            `json:"hostname,omitempty"`
+	Username  string            `json:"username,omitempty"`
+	Principal string            `json:"principal,omitempty"`
+	SourceIP  string            `json:"source_ip,omitempty"`
+	SessionID string            `json:"session_id,omitempty"`
+	Message   string            `json:"message,omitempty"`
+	Raw       string            `json:"raw,omitempty"`
+	Fields    map[string]string `json:"fields,omitempty"`
+}
+
+func NewEvent(ts time.Time) Event {
+	return Event{Timestamp: ts.UTC().Format(time.RFC3339Nano)}
+}

agent/internal/version/version.go

@@ -0,0 +1,7 @@
+package version
+
+var (
+	Version   = "0.0.1-dev"
+	Commit    = ""
+	BuildDate = ""
+)

app/apps/access/admin.py

@@ -0,0 +1,108 @@
+from django.contrib import admin
+from django.urls import reverse
+from django.utils import timezone
+from django.utils.html import format_html
+try:
+    from unfold.contrib.guardian.admin import GuardedModelAdmin
+except ImportError:  # Fallback for older Unfold builds without guardian admin shim.
+    from guardian.admin import GuardedModelAdmin as GuardianGuardedModelAdmin
+    from unfold.admin import ModelAdmin as UnfoldModelAdmin
+
+    class GuardedModelAdmin(GuardianGuardedModelAdmin, UnfoldModelAdmin):
+        pass
+
+from .models import AccessRequest
+
+
+@admin.register(AccessRequest)
+class AccessRequestAdmin(GuardedModelAdmin):
+    autocomplete_fields = ("requester", "server", "decided_by")
+    list_display = (
+        "id",
+        "requester",
+        "server",
+        "status",
+        "request_shell",
+        "request_logs",
+        "request_users",
+        "requested_at",
+        "expires_at",
+        "decided_by",
+        "delete_link",
+    )
+    list_filter = ("status", "server")
+    search_fields = ("requester__username", "requester__email", "server__display_name")
+    ordering = ("-requested_at",)
+    compressed_fields = True
+    actions_on_top = True
+    actions_on_bottom = True
+    def get_readonly_fields(self, request, obj=None):
+        readonly = ["requested_at"]
+        if obj:
+            readonly.extend(["decided_at", "decided_by"])
+        return readonly
+
+    def get_fieldsets(self, request, obj=None):
+        if obj is None:
+            return (
+                (
+                    "Request",
+                    {
+                        "fields": (
+                            "requester",
+                            "server",
+                            "status",
+                            "reason",
+                            "request_shell",
+                            "request_logs",
+                            "request_users",
+                            "expires_at",
+                        )
+                    },
+                ),
+            )
+        return (
+            (
+                "Request",
+                {
+                    "fields": (
+                        "requester",
+                        "server",
+                        "status",
+                        "reason",
+                        "request_shell",
+                        "request_logs",
+                        "request_users",
+                        "expires_at",
+                    )
+                },
+            ),
+            (
+                "Decision",
+                {
+                    "fields": (
+                        "decided_at",
+                        "decided_by",
+                    )
+                },
+            ),
+        )
+
+    def save_model(self, request, obj, form, change) -> None:
+        if obj.status in {
+            AccessRequest.Status.APPROVED,
+            AccessRequest.Status.DENIED,
+            AccessRequest.Status.REVOKED,
+            AccessRequest.Status.CANCELLED,
+        }:
+            if not obj.decided_at:
+                obj.decided_at = timezone.now()
+            if not obj.decided_by_id and request.user and request.user.is_authenticated:
+                obj.decided_by = request.user
+        super().save_model(request, obj, form, change)
+
+    def delete_link(self, obj: AccessRequest):
+        url = reverse("admin:access_accessrequest_delete", args=[obj.pk])
+        return format_html('<a class="text-red-600" href="{}">Delete</a>', url)
+
+    delete_link.short_description = "Delete"

app/apps/access/apps.py

@@ -0,0 +1,11 @@
+from django.apps import AppConfig
+
+
+class AccessConfig(AppConfig):
+    default_auto_field = "django.db.models.BigAutoField"
+    name = "apps.access"
+    verbose_name = "Access Requests"
+
+    def ready(self) -> None:
+        from . import signals  # noqa: F401
+        return super().ready()

app/apps/access/migrations/0001_initial.py

@@ -0,0 +1,78 @@
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ("servers", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="AccessRequest",
+            fields=[
+                ("id", models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name="ID")),
+                (
+                    "status",
+                    models.CharField(
+                        choices=[
+                            ("pending", "Pending"),
+                            ("approved", "Approved"),
+                            ("denied", "Denied"),
+                            ("revoked", "Revoked"),
+                            ("cancelled", "Cancelled"),
+                            ("expired", "Expired"),
+                        ],
+                        db_index=True,
+                        default="pending",
+                        max_length=16,
+                    ),
+                ),
+                ("reason", models.TextField(blank=True)),
+                ("requested_at", models.DateTimeField(default=django.utils.timezone.now, editable=False)),
+                ("decided_at", models.DateTimeField(blank=True, null=True)),
+                ("expires_at", models.DateTimeField(blank=True, null=True)),
+                (
+                    "decided_by",
+                    models.ForeignKey(
+                        blank=True,
+                        null=True,
+                        on_delete=django.db.models.deletion.SET_NULL,
+                        related_name="access_decisions",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+                (
+                    "requester",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="access_requests",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+                (
+                    "server",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="access_requests",
+                        to="servers.server",
+                    ),
+                ),
+            ],
+            options={
+                "verbose_name": "Access request",
+                "verbose_name_plural": "Access requests",
+                "ordering": ["-requested_at"],
+                "indexes": [
+                    models.Index(fields=["status", "requested_at"], name="acc_req_status_req_idx"),
+                    models.Index(fields=["server", "status"], name="acc_req_server_status_idx"),
+                ],
+            },
+        ),
+    ]

app/apps/access/migrations/0002_remove_delete_permission.py

@@ -0,0 +1,37 @@
+from django.db import migrations, models
+
+
+def remove_delete_accessrequest_perm(apps, schema_editor):
+    Permission = apps.get_model("auth", "Permission")
+    ContentType = apps.get_model("contenttypes", "ContentType")
+    try:
+        content_type = ContentType.objects.get(app_label="access", model="accessrequest")
+    except ContentType.DoesNotExist:
+        return
+    Permission.objects.filter(content_type=content_type, codename="delete_accessrequest").delete()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("access", "0001_initial"),
+        ("auth", "__latest__"),
+        ("contenttypes", "__latest__"),
+    ]
+
+    operations = [
+        migrations.RunPython(remove_delete_accessrequest_perm, migrations.RunPython.noop),
+        migrations.AlterModelOptions(
+            name="accessrequest",
+            options={
+                "verbose_name": "Access request",
+                "verbose_name_plural": "Access requests",
+                "default_permissions": ("add", "view", "change"),
+                "indexes": [
+                    models.Index(fields=["status", "requested_at"], name="acc_req_status_req_idx"),
+                    models.Index(fields=["server", "status"], name="acc_req_server_status_idx"),
+                ],
+                "ordering": ["-requested_at"],
+            },
+        ),
+    ]

app/apps/access/migrations/0003_access_request_options.py

@@ -0,0 +1,26 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("access", "0002_remove_delete_permission"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="accessrequest",
+            name="request_shell",
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AddField(
+            model_name="accessrequest",
+            name="request_logs",
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AddField(
+            model_name="accessrequest",
+            name="request_users",
+            field=models.BooleanField(default=False),
+        ),
+    ]

app/apps/access/models.py

@@ -0,0 +1,61 @@
+from __future__ import annotations
+
+from django.conf import settings
+from django.db import models
+from django.utils import timezone
+
+from apps.servers.models import Server
+
+
+class AccessRequest(models.Model):
+    class Status(models.TextChoices):
+        PENDING = "pending", "Pending"
+        APPROVED = "approved", "Approved"
+        DENIED = "denied", "Denied"
+        REVOKED = "revoked", "Revoked"
+        CANCELLED = "cancelled", "Cancelled"
+        EXPIRED = "expired", "Expired"
+
+    requester = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name="access_requests",
+    )
+    server = models.ForeignKey(
+        Server, on_delete=models.CASCADE, related_name="access_requests"
+    )
+    status = models.CharField(
+        max_length=16, choices=Status.choices, default=Status.PENDING, db_index=True
+    )
+    reason = models.TextField(blank=True)
+    request_shell = models.BooleanField(default=False)
+    request_logs = models.BooleanField(default=False)
+    request_users = models.BooleanField(default=False)
+    requested_at = models.DateTimeField(default=timezone.now, editable=False)
+    decided_at = models.DateTimeField(null=True, blank=True)
+    expires_at = models.DateTimeField(null=True, blank=True)
+    decided_by = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        null=True,
+        blank=True,
+        on_delete=models.SET_NULL,
+        related_name="access_decisions",
+    )
+
+    class Meta:
+        verbose_name = "Access request"
+        verbose_name_plural = "Access requests"
+        default_permissions = ("add", "view", "change")
+        indexes = [
+            models.Index(fields=["status", "requested_at"], name="acc_req_status_req_idx"),
+            models.Index(fields=["server", "status"], name="acc_req_server_status_idx"),
+        ]
+        ordering = ["-requested_at"]
+
+    def is_expired(self) -> bool:
+        if not self.expires_at:
+            return False
+        return self.expires_at <= timezone.now()
+
+    def __str__(self) -> str:
+        return f"{self.requester_id} -> {self.server_id} ({self.status})"

app/apps/access/permissions.py

@@ -0,0 +1,26 @@
+from __future__ import annotations
+
+from django.db.models import Q
+from django.utils import timezone
+from guardian.shortcuts import assign_perm, remove_perm
+
+from .models import AccessRequest
+
+
+def sync_server_view_perm(access_request: AccessRequest) -> None:
+    if not access_request or not access_request.requester_id or not access_request.server_id:
+        return
+    now = timezone.now()
+    has_valid_access = (
+        AccessRequest.objects.filter(
+            requester_id=access_request.requester_id,
+            server_id=access_request.server_id,
+            status=AccessRequest.Status.APPROVED,
+        )
+        .filter(Q(expires_at__isnull=True) | Q(expires_at__gt=now))
+        .exists()
+    )
+    if has_valid_access:
+        assign_perm("servers.view_server", access_request.requester, access_request.server)
+        return
+    remove_perm("servers.view_server", access_request.requester, access_request.server)

app/apps/access/signals.py

@@ -0,0 +1,22 @@
+from __future__ import annotations
+
+from django.db.models.signals import post_save
+from django.dispatch import receiver
+from guardian.shortcuts import assign_perm
+
+from apps.core.rbac import assign_default_object_permissions
+from .models import AccessRequest
+from .permissions import sync_server_view_perm
+
+
+@receiver(post_save, sender=AccessRequest)
+def assign_access_request_perms(sender, instance: AccessRequest, created: bool, **kwargs) -> None:
+    if not created:
+        sync_server_view_perm(instance)
+        return
+    if instance.requester_id:
+        user = instance.requester
+        for perm in ("access.view_accessrequest", "access.change_accessrequest"):
+            assign_perm(perm, user, instance)
+    assign_default_object_permissions(instance)
+    sync_server_view_perm(instance)

app/apps/access/tasks.py

@@ -0,0 +1,27 @@
+from __future__ import annotations
+
+from celery import shared_task
+from django.db import transaction
+from django.utils import timezone
+from .models import AccessRequest
+from .permissions import sync_server_view_perm
+
+
+@shared_task
+def expire_access_requests() -> int:
+    now = timezone.now()
+    expired_qs = AccessRequest.objects.select_related("server", "requester").filter(
+        status=AccessRequest.Status.APPROVED,
+        expires_at__isnull=False,
+        expires_at__lte=now,
+    )
+    count = 0
+    for access_request in expired_qs:
+        with transaction.atomic():
+            access_request.status = AccessRequest.Status.EXPIRED
+            access_request.decided_at = now
+            access_request.decided_by = None
+            access_request.save(update_fields=["status", "decided_at", "decided_by"])
+        sync_server_view_perm(access_request)
+        count += 1
+    return count

app/apps/accounts/admin.py

@@ -1,3 +1,58 @@
+from django import forms
 from django.contrib import admin
-#
-# No custom models registered in accounts app. The legacy Account model has been removed.
+from django.utils import timezone
+from unfold.admin import ModelAdmin
+
+from .models import ErasureRequest
+
+
+class ErasureRequestAdminForm(forms.ModelForm):
+    class Meta:
+        model = ErasureRequest
+        fields = "__all__"
+
+    def clean(self):
+        cleaned = super().clean()
+        status = cleaned.get("status")
+        decision_reason = (cleaned.get("decision_reason") or "").strip()
+        if status in {ErasureRequest.Status.DENIED, ErasureRequest.Status.PROCESSED} and not decision_reason:
+            raise forms.ValidationError("Decision reason is required for denied or processed requests.")
+        return cleaned
+
+
+@admin.register(ErasureRequest)
+class ErasureRequestAdmin(ModelAdmin):
+    form = ErasureRequestAdminForm
+    list_display = ("id", "user", "status", "requested_at", "decided_at", "processed_at")
+    list_filter = ("status", "requested_at", "processed_at")
+    search_fields = ("user__username", "user__email")
+    readonly_fields = ("requested_at", "decided_at", "processed_at", "decided_by", "processed_by")
+    fieldsets = (
+        (
+            "Request",
+            {
+                "fields": ("user", "reason", "status", "requested_at"),
+            },
+        ),
+        (
+            "Decision",
+            {
+                "fields": ("decision_reason", "decided_by", "decided_at"),
+            },
+        ),
+        (
+            "Processing",
+            {
+                "fields": ("processed_by", "processed_at"),
+            },
+        ),
+    )
+
+    def save_model(self, request, obj, form, change) -> None:
+        if obj.status == ErasureRequest.Status.PROCESSED:
+            obj.process(request.user, decision_reason=obj.decision_reason)
+            return
+        if obj.status == ErasureRequest.Status.DENIED and not obj.decided_at:
+            obj.decided_at = timezone.now()
+            obj.decided_by = request.user
+        super().save_model(request, obj, form, change)

app/apps/accounts/forms.py

@@ -0,0 +1,39 @@
+from django import forms
+
+
+class ErasureRequestForm(forms.Form):
+    reason = forms.CharField(
+        label="Reason for erasure request",
+        widget=forms.Textarea(
+            attrs={
+                "rows": 4,
+                "placeholder": "Explain why you are requesting data erasure.",
+                "class": "block w-full resize-y rounded-lg border border-gray-300 bg-gray-50 p-2.5 text-sm text-gray-900 focus:border-blue-500 focus:ring-blue-500",
+            }
+        ),
+        min_length=10,
+        max_length=2000,
+    )
+
+
+class SSHKeyForm(forms.Form):
+    name = forms.CharField(
+        label="Key Name",
+        max_length=128,
+        widget=forms.TextInput(
+            attrs={
+                "placeholder": "Device Name",
+                "class": "block w-full rounded-lg border border-gray-300 bg-gray-50 p-2.5 text-sm text-gray-900 focus:border-blue-500 focus:ring-blue-500",
+            }
+        ),
+    )
+    public_key = forms.CharField(
+        label="SSH Public Key",
+        widget=forms.Textarea(
+            attrs={
+                "rows": 4,
+                "placeholder": "ssh-ed25519 AAAaBBbBcCcc111122223333... user@host",
+                "class": "block w-full resize-y rounded-lg border border-gray-300 bg-gray-50 p-2.5 text-sm text-gray-900 focus:border-blue-500 focus:ring-blue-500",
+            }
+        ),
+    )

app/apps/accounts/migrations/0005_unique_user_email_index.py

@@ -0,0 +1,20 @@
+from django.conf import settings
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("accounts", "0004_delete_account"),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.RunSQL(
+            sql=(
+                "CREATE UNIQUE INDEX IF NOT EXISTS auth_user_email_uniq "
+                "ON auth_user (email);"
+            ),
+            reverse_sql="DROP INDEX IF EXISTS auth_user_email_uniq;",
+        ),
+    ]

app/apps/accounts/migrations/0006_erasure_request.py

@@ -0,0 +1,75 @@
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("accounts", "0005_unique_user_email_index"),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="ErasureRequest",
+            fields=[
+                ("id", models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name="ID")),
+                ("reason", models.TextField()),
+                (
+                    "status",
+                    models.CharField(
+                        choices=[("pending", "Pending"), ("denied", "Denied"), ("processed", "Processed")],
+                        db_index=True,
+                        default="pending",
+                        max_length=16,
+                    ),
+                ),
+                ("requested_at", models.DateTimeField(default=django.utils.timezone.now, editable=False)),
+                ("decided_at", models.DateTimeField(blank=True, null=True)),
+                ("decision_reason", models.TextField(blank=True)),
+                ("processed_at", models.DateTimeField(blank=True, null=True)),
+                (
+                    "decided_by",
+                    models.ForeignKey(
+                        blank=True,
+                        null=True,
+                        on_delete=django.db.models.deletion.SET_NULL,
+                        related_name="erasure_decisions",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+                (
+                    "processed_by",
+                    models.ForeignKey(
+                        blank=True,
+                        null=True,
+                        on_delete=django.db.models.deletion.SET_NULL,
+                        related_name="erasure_processes",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+                (
+                    "user",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="erasure_requests",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+            ],
+            options={
+                "verbose_name": "Erasure request",
+                "verbose_name_plural": "Erasure requests",
+                "ordering": ["-requested_at"],
+            },
+        ),
+        migrations.AddIndex(
+            model_name="erasurerequest",
+            index=models.Index(fields=["status", "requested_at"], name="accounts_erasure_status_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="erasurerequest",
+            index=models.Index(fields=["user", "status"], name="accounts_er_user_status_idx"),
+        ),
+    ]

app/apps/accounts/models.py

@@ -1,3 +1,126 @@
-from django.db import models
-#
-# Legacy Account model has been removed. This app now contains URLs/views only.
+from __future__ import annotations
+
+import uuid
+
+from django.conf import settings
+from django.db import models, transaction
+from django.utils import timezone
+
+
+class ErasureRequest(models.Model):
+    class Status(models.TextChoices):
+        PENDING = "pending", "Pending"
+        DENIED = "denied", "Denied"
+        PROCESSED = "processed", "Processed"
+
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name="erasure_requests",
+    )
+    reason = models.TextField()
+    status = models.CharField(max_length=16, choices=Status.choices, default=Status.PENDING, db_index=True)
+    requested_at = models.DateTimeField(default=timezone.now, editable=False)
+    decided_at = models.DateTimeField(null=True, blank=True)
+    decided_by = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        null=True,
+        blank=True,
+        on_delete=models.SET_NULL,
+        related_name="erasure_decisions",
+    )
+    decision_reason = models.TextField(blank=True)
+    processed_at = models.DateTimeField(null=True, blank=True)
+    processed_by = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        null=True,
+        blank=True,
+        on_delete=models.SET_NULL,
+        related_name="erasure_processes",
+    )
+
+    class Meta:
+        verbose_name = "Erasure request"
+        verbose_name_plural = "Erasure requests"
+        ordering = ["-requested_at"]
+        indexes = [
+            models.Index(fields=["status", "requested_at"], name="accounts_erasure_status_idx"),
+            models.Index(fields=["user", "status"], name="accounts_er_user_status_idx"),
+        ]
+
+    def __str__(self) -> str:
+        return f"Erasure request #{self.id} ({self.user_id})"
+
+    def process(self, admin_user, decision_reason: str = "") -> None:
+        if self.status == self.Status.PROCESSED:
+            return
+        now = timezone.now()
+        with transaction.atomic():
+            self._anonymize_user(admin_user, now)
+            self.status = self.Status.PROCESSED
+            self.decided_at = now
+            self.decided_by = admin_user
+            self.decision_reason = (decision_reason or "").strip()
+            self.processed_at = now
+            self.processed_by = admin_user
+            self.save(
+                update_fields=[
+                    "status",
+                    "decided_at",
+                    "decided_by",
+                    "decision_reason",
+                    "processed_at",
+                    "processed_by",
+                ]
+            )
+
+    def _anonymize_user(self, admin_user, now) -> None:
+        from guardian.models import UserObjectPermission
+
+        from apps.access.models import AccessRequest
+        from apps.keys.models import SSHCertificate, SSHKey
+
+        user = self.user
+        token = uuid.uuid4().hex
+        anonymous_username = f"erased-{token}"
+        anonymous_email = f"{anonymous_username}@erased.local"
+
+        user.username = anonymous_username
+        user.email = anonymous_email
+        user.first_name = ""
+        user.last_name = ""
+        user.is_active = False
+        user.is_staff = False
+        user.is_superuser = False
+        user.last_login = None
+        user.set_unusable_password()
+        user.save(
+            update_fields=[
+                "username",
+                "email",
+                "first_name",
+                "last_name",
+                "is_active",
+                "is_staff",
+                "is_superuser",
+                "last_login",
+                "password",
+            ]
+        )
+
+        user.groups.clear()
+        user.user_permissions.clear()
+        UserObjectPermission.objects.filter(user=user).delete()
+
+        SSHKey.objects.filter(user=user, is_active=True).update(is_active=False, revoked_at=now)
+        SSHCertificate.objects.filter(user=user, is_active=True).update(is_active=False, revoked_at=now)
+        AccessRequest.objects.filter(requester=user).update(reason="[redacted]")
+        AccessRequest.objects.filter(
+            requester=user,
+            status__in=[AccessRequest.Status.PENDING, AccessRequest.Status.APPROVED],
+        ).update(
+            status=AccessRequest.Status.REVOKED,
+            decided_at=now,
+            decided_by=admin_user,
+            expires_at=now,
+        )

app/apps/accounts/templates/accounts/login.html

@@ -4,35 +4,55 @@
 
 {% block content %}
   <div class="mx-auto max-w-md">
-    <div class="rounded-xl border border-gray-200 bg-white p-6 shadow-sm sm:p-8">
-      <h1 class="mb-6 text-xl font-semibold tracking-tight text-gray-900">Sign in</h1>
-      <form method="post" class="space-y-4">
+    <div class="rounded-2xl border border-gray-200 bg-white p-6 shadow-sm sm:p-8">
+      <div class="space-y-2">
+        <h1 class="text-2xl font-semibold tracking-tight text-gray-900">Welcome back</h1>
+        <p class="text-sm text-gray-500">Sign in to manage server access and certificates.</p>
+      </div>
+
+      <form method="post" class="mt-6 space-y-5">
         {% csrf_token %}
-        <input type="hidden" name="next" value="{% url 'accounts:profile' %}">
-        <div class="space-y-1.5">
-          <label class="block text-sm font-medium text-gray-700">Username</label>
-          <input type="text" name="username" autocomplete="username" required class="block w-full rounded-md border-gray-300 shadow-sm focus:border-purple-600 focus:ring-purple-600">
+        <input type="hidden" name="next" value="{% url 'servers:dashboard' %}">
+        <div>
+          <label class="mb-2 block text-sm font-medium text-gray-900">Username</label>
+          <input
+            type="text"
+            name="username"
+            autocomplete="username"
+            required
+            class="block w-full rounded-lg border border-gray-300 bg-gray-50 p-2.5 text-sm text-gray-900 focus:border-blue-500 focus:ring-blue-500"
+          >
         </div>
-        <div class="space-y-1.5">
-          <label class="block text-sm font-medium text-gray-700">Password</label>
-          <input type="password" name="password" autocomplete="current-password" required class="block w-full rounded-md border-gray-300 shadow-sm focus:border-purple-600 focus:ring-purple-600">
+        <div>
+          <label class="mb-2 block text-sm font-medium text-gray-900">Password</label>
+          <input
+            type="password"
+            name="password"
+            autocomplete="current-password"
+            required
+            class="block w-full rounded-lg border border-gray-300 bg-gray-50 p-2.5 text-sm text-gray-900 focus:border-blue-500 focus:ring-blue-500"
+          >
         </div>
         {% if form.errors %}
-          <p class="text-sm text-red-600">Please check your username and password.</p>
+          <div class="flex items-center gap-2 rounded-lg bg-red-50 p-3 text-sm text-red-800" role="alert">
+            <span class="font-medium">Sign-in failed.</span>
+            <span>Please check your username and password.</span>
+          </div>
         {% endif %}
-        <div class="pt-2">
-          <button type="submit" class="inline-flex w-full items-center justify-center rounded-md bg-purple-600 px-4 py-2.5 text-sm font-semibold text-white shadow hover:bg-purple-700 focus:outline-none focus-visible:ring-2 focus-visible:ring-purple-600">
-            Sign in
-          </button>
-        </div>
+        <button
+          type="submit"
+          class="inline-flex w-full items-center justify-center rounded-lg bg-blue-700 px-5 py-2.5 text-sm font-semibold text-white shadow-sm hover:bg-blue-800 focus:outline-none focus:ring-4 focus:ring-blue-300"
+        >
+          Sign in
+        </button>
       </form>
+
       <div class="mt-6 border-t border-gray-200 pt-6">
         <p class="text-sm text-gray-600">
           Or, if configured, use
-          <a href="/oidc/authenticate/" class="font-medium text-purple-700 hover:text-purple-800">OIDC login</a>.
+          <a href="/oidc/authenticate/" class="font-medium text-blue-700 hover:underline">OIDC login</a>.
         </p>
       </div>
     </div>
   </div>
 {% endblock %}
-

app/apps/accounts/templates/accounts/profile.html

@@ -3,47 +3,281 @@
 {% block title %}Profile • Keywarden{% endblock %}
 
 {% block content %}
-  <div class="grid grid-cols-1 gap-6 lg:grid-cols-2">
-    <div>
-      <div class="rounded-xl border border-gray-200 bg-white p-6 shadow-sm sm:p-8">
-        <h1 class="mb-6 text-xl font-semibold tracking-tight text-gray-900">Your Profile</h1>
-        <dl class="grid grid-cols-1 gap-x-6 gap-y-4 sm:grid-cols-2">
-          <div>
-            <dt class="text-sm font-medium text-gray-500">Username</dt>
-            <dd class="mt-1 text-sm text-gray-900">{{ user.username }}</dd>
+  <div class="space-y-6">
+    <div class="grid gap-6 lg:grid-cols-3">
+      <section class="rounded-2xl border border-gray-200 bg-white p-6 shadow-sm lg:col-span-2">
+        <div class="space-y-2">
+          <h1 class="text-xl font-semibold tracking-tight text-gray-900">Your Profile</h1>
+          <p class="text-sm text-gray-500">Account details and contact information.</p>
+        </div>
+        <dl class="mt-6 grid grid-cols-1 gap-4 text-sm text-gray-600 sm:grid-cols-2">
+          <div class="rounded-lg border border-gray-100 bg-gray-50 p-4">
+            <dt class="text-xs font-semibold uppercase tracking-wide text-gray-500">Username</dt>
+            <dd class="mt-2 text-sm font-medium text-gray-900">{{ user.username }}</dd>
           </div>
-          <div>
-            <dt class="text-sm font-medium text-gray-500">Email</dt>
-            <dd class="mt-1 text-sm text-gray-900">{{ user.email }}</dd>
+          <div class="rounded-lg border border-gray-100 bg-gray-50 p-4">
+            <dt class="text-xs font-semibold uppercase tracking-wide text-gray-500">Email</dt>
+            <dd class="mt-2 text-sm font-medium text-gray-900">{{ user.email }}</dd>
           </div>
-          <div>
-            <dt class="text-sm font-medium text-gray-500">First name</dt>
-            <dd class="mt-1 text-sm text-gray-900">{{ user.first_name|default:"—" }}</dd>
+          <div class="rounded-lg border border-gray-100 bg-gray-50 p-4">
+            <dt class="text-xs font-semibold uppercase tracking-wide text-gray-500">First name</dt>
+            <dd class="mt-2 text-sm font-medium text-gray-900">{{ user.first_name|default:"—" }}</dd>
           </div>
-          <div>
-            <dt class="text-sm font-medium text-gray-500">Last name</dt>
-            <dd class="mt-1 text-sm text-gray-900">{{ user.last_name|default:"—" }}</dd>
+          <div class="rounded-lg border border-gray-100 bg-gray-50 p-4">
+            <dt class="text-xs font-semibold uppercase tracking-wide text-gray-500">Last name</dt>
+            <dd class="mt-2 text-sm font-medium text-gray-900">{{ user.last_name|default:"—" }}</dd>
           </div>
         </dl>
-      </div>
-    </div>
-    <div>
-      <div class="rounded-xl border border-gray-200 bg-white p-6 shadow-sm sm:p-8">
-        <h2 class="mb-4 text-base font-semibold tracking-tight text-gray-900">Single Sign-On</h2>
-        {% if auth_mode == "hybrid" %}
-          <div class="mt-6 border-t border-gray-200 pt-6">
-            <p class="text-sm text-gray-600">
-              Optional: Link your account with your identity provider for single sign-on.
-              <a href="/oidc/authenticate/" class="font-medium text-purple-700 hover:text-purple-800">Link with SSO</a>
-            </p>
-          </div>
-        {% elif auth_mode == "oidc" %}
-          <p class="text-sm text-gray-600">OIDC is required. Sign-in is managed by your identity provider.</p>
-        {% else %}
-          <p class="text-sm text-gray-600">OIDC is disabled. You are using native authentication.</p>
-        {% endif %}
-      </div>
-    </div>
-  </div>
-{% endblock %}
+      </section>
 
+      <section class="rounded-2xl border border-gray-200 bg-white p-6 shadow-sm">
+        <div class="space-y-2">
+          <h2 class="text-base font-semibold text-gray-900">Single Sign-On</h2>
+          <p class="text-sm text-gray-500">Manage how you authenticate with external providers.</p>
+        </div>
+        <div class="mt-4 rounded-xl border border-dashed border-gray-200 bg-gray-50 p-4 text-sm text-gray-600">
+          {% if auth_mode == "hybrid" %}
+            Optional: Link your account with your identity provider for single sign-on.
+            <a href="/oidc/authenticate/" class="font-semibold text-blue-700 hover:underline">Link with SSO</a>
+          {% elif auth_mode == "oidc" %}
+            OIDC is required. Sign-in is managed by your identity provider.
+          {% else %}
+            OIDC is disabled. You are using native authentication.
+          {% endif %}
+        </div>
+      </section>
+    </div>
+
+    <section class="rounded-2xl border border-gray-200 bg-white p-6 shadow-sm">
+      <div class="flex flex-wrap items-start justify-between gap-4">
+        <div>
+          <h2 class="text-base font-semibold text-gray-900">SSH certificates</h2>
+          <p class="mt-1 text-sm text-gray-500">
+            Upload your SSH public key to receive a signed certificate for server access.
+          </p>
+        </div>
+        <span class="inline-flex items-center rounded-full bg-blue-50 px-2.5 py-1 text-xs font-semibold text-blue-700">Certificates</span>
+      </div>
+
+      {% if can_add_key %}
+        <form method="post" class="mt-6 grid gap-4 lg:grid-cols-2">
+          {% csrf_token %}
+          <input type="hidden" name="form_type" value="ssh_key">
+          <div>
+            <label for="{{ key_form.name.id_for_label }}" class="mb-2 block text-sm font-medium text-gray-900">
+              Key name
+            </label>
+            {{ key_form.name }}
+            {% if key_form.name.errors %}
+              <p class="mt-1 text-sm text-red-600">{{ key_form.name.errors|striptags }}</p>
+            {% endif %}
+          </div>
+          <div class="lg:col-span-2">
+            <label for="{{ key_form.public_key.id_for_label }}" class="mb-2 block text-sm font-medium text-gray-900">
+              SSH public key
+            </label>
+            {{ key_form.public_key }}
+            {% if key_form.public_key.errors %}
+              <p class="mt-1 text-sm text-red-600">{{ key_form.public_key.errors|striptags }}</p>
+            {% endif %}
+          </div>
+          {% if key_form.non_field_errors %}
+            <p class="text-sm text-red-600">{{ key_form.non_field_errors|striptags }}</p>
+          {% endif %}
+          <div>
+            <button
+              type="submit"
+              class="inline-flex items-center rounded-lg bg-blue-700 px-4 py-2 text-sm font-semibold text-white shadow-sm hover:bg-blue-800 focus:outline-none focus:ring-4 focus:ring-blue-300"
+            >
+              Upload key
+            </button>
+          </div>
+        </form>
+      {% else %}
+        <p class="mt-4 text-sm text-gray-600">You do not have permission to add SSH keys.</p>
+      {% endif %}
+
+      {% if ssh_keys %}
+        <div class="mt-6 overflow-hidden rounded-xl border border-gray-200">
+          <table class="w-full text-left text-sm text-gray-500">
+            <thead class="bg-gray-50 text-xs uppercase text-gray-500">
+              <tr>
+                <th scope="col" class="px-6 py-3">Key</th>
+                <th scope="col" class="px-6 py-3">Fingerprint</th>
+                <th scope="col" class="px-6 py-3 text-right">Actions</th>
+              </tr>
+            </thead>
+            <tbody>
+              {% for key in ssh_keys %}
+                <tr class="border-t bg-white">
+                  <th scope="row" class="px-6 py-4 font-medium text-gray-900">
+                    {{ key.name }}
+                  </th>
+                  <td class="px-6 py-4 text-xs text-gray-500">{{ key.fingerprint }}</td>
+                  <td class="px-6 py-4">
+                    <div class="flex flex-wrap items-center justify-end gap-2">
+                      {% if key.is_active %}
+                        <span class="inline-flex items-center rounded-full bg-emerald-100 px-2.5 py-0.5 text-xs font-medium text-emerald-800">Active</span>
+                        <div class="inline-flex rounded-lg shadow-sm" role="group">
+                          <button
+                            type="button"
+                            class="inline-flex items-center rounded-l-lg bg-blue-700 px-3 py-1.5 text-xs font-semibold text-white hover:bg-blue-800 focus:outline-none focus:ring-2 focus:ring-blue-300"
+                            data-download-url="/api/v1/keys/{{ key.id }}/certificate"
+                          >
+                            Download
+                          </button>
+                          <button
+                            type="button"
+                            class="inline-flex items-center rounded-r-lg border border-gray-200 bg-white px-3 py-1.5 text-xs font-semibold text-gray-700 hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-blue-300"
+                            data-download-url="/api/v1/keys/{{ key.id }}/certificate.sha256"
+                          >
+                            Hash
+                          </button>
+                        </div>
+                        <button
+                          type="button"
+                          class="inline-flex items-center rounded-lg bg-rose-600 px-3 py-1.5 text-xs font-semibold text-white hover:bg-rose-700 focus:outline-none focus:ring-2 focus:ring-rose-300 js-regenerate-cert"
+                          data-key-id="{{ key.id }}"
+                        >
+                          Regenerate
+                        </button>
+                      {% else %}
+                        <span class="inline-flex items-center rounded-full bg-gray-200 px-2.5 py-0.5 text-xs font-medium text-gray-700">Revoked</span>
+                      {% endif %}
+                    </div>
+                  </td>
+                </tr>
+              {% endfor %}
+            </tbody>
+          </table>
+        </div>
+      {% else %}
+        <p class="mt-4 text-sm text-gray-600">No SSH keys uploaded yet.</p>
+      {% endif %}
+    </section>
+
+    <section class="rounded-2xl border border-gray-200 bg-white p-6 shadow-sm">
+      <div class="flex flex-wrap items-start justify-between gap-4">
+        <div>
+          <h2 class="text-base font-semibold text-gray-900">Data erasure request</h2>
+          <p class="mt-1 text-sm text-gray-500">
+            Submit a GDPR erasure request to anonymize your account data. An administrator
+            must review and approve the request before processing.
+          </p>
+        </div>
+        <span class="inline-flex items-center rounded-full bg-gray-100 px-2.5 py-1 text-xs font-semibold text-gray-700">GDPR</span>
+      </div>
+
+      {% if erasure_request %}
+        <div class="mt-4 rounded-lg border border-gray-200 bg-gray-50 p-4 text-sm text-gray-700">
+          <div class="flex flex-wrap items-center gap-2">
+            <span class="text-xs font-semibold uppercase tracking-wide text-gray-500">Status</span>
+            <span class="inline-flex items-center rounded-full bg-gray-200 px-2.5 py-1 text-xs font-semibold text-gray-700">
+              {{ erasure_request.status|capfirst }}
+            </span>
+            <span class="text-gray-500">Requested {{ erasure_request.requested_at|date:"M j, Y H:i" }}</span>
+          </div>
+          {% if erasure_request.decided_at %}
+            <p class="mt-2 text-gray-600">
+              Decision {{ erasure_request.decided_at|date:"M j, Y H:i" }}.
+              {% if erasure_request.decision_reason %}
+                Reason: {{ erasure_request.decision_reason }}
+              {% endif %}
+            </p>
+          {% endif %}
+          {% if erasure_request.status == "processed" %}
+            <p class="mt-2 text-gray-600">
+              Your account has been anonymized. Access has been revoked and SSH keys disabled.
+            </p>
+          {% endif %}
+        </div>
+      {% endif %}
+
+      {% if not erasure_request or erasure_request.status != "pending" %}
+        <form method="post" class="mt-6 grid gap-4">
+          {% csrf_token %}
+          <input type="hidden" name="form_type" value="erasure">
+          <div>
+            <label for="{{ erasure_form.reason.id_for_label }}" class="mb-2 block text-sm font-medium text-gray-900">
+              Reason for request
+            </label>
+            {{ erasure_form.reason }}
+            {% if erasure_form.reason.errors %}
+              <p class="mt-1 text-sm text-red-600">{{ erasure_form.reason.errors|striptags }}</p>
+            {% endif %}
+          </div>
+          {% if erasure_form.non_field_errors %}
+            <p class="text-sm text-red-600">{{ erasure_form.non_field_errors|striptags }}</p>
+          {% endif %}
+          <div>
+            <button
+              type="submit"
+              class="inline-flex items-center rounded-lg bg-blue-700 px-4 py-2 text-sm font-semibold text-white shadow-sm hover:bg-blue-800 focus:outline-none focus:ring-4 focus:ring-blue-300"
+            >
+              Submit erasure request
+            </button>
+          </div>
+        </form>
+      {% endif %}
+    </section>
+  </div>
+
+  <script>
+    (function () {
+      function getCookie(name) {
+        var value = "; " + document.cookie;
+        var parts = value.split("; " + name + "=");
+        if (parts.length === 2) {
+          return parts.pop().split(";").shift();
+        }
+        return "";
+      }
+
+      function handleDownload(event) {
+        var button = event.currentTarget;
+        var url = button.getAttribute("data-download-url");
+        if (!url) {
+          return;
+        }
+        window.location.href = url;
+      }
+
+      function handleRegenerate(event) {
+        var button = event.currentTarget;
+        var keyId = button.getAttribute("data-key-id");
+        if (!keyId) {
+          return;
+        }
+        if (!window.confirm("Regenerate the certificate for this key?")) {
+          return;
+        }
+        var csrf = getCookie("csrftoken");
+        fetch("/api/v1/keys/" + keyId + "/certificate", {
+          method: "POST",
+          credentials: "same-origin",
+          headers: {
+            "X-CSRFToken": csrf,
+          },
+        })
+          .then(function (response) {
+            if (!response.ok) {
+              throw new Error("Certificate regeneration failed.");
+            }
+            window.alert("Certificate regenerated.");
+          })
+          .catch(function (err) {
+            window.alert(err.message);
+          });
+      }
+
+      var downloadButtons = document.querySelectorAll("[data-download-url]");
+      for (var i = 0; i < downloadButtons.length; i += 1) {
+        downloadButtons[i].addEventListener("click", handleDownload);
+      }
+      var buttons = document.querySelectorAll(".js-regenerate-cert");
+      for (var j = 0; j < buttons.length; j += 1) {
+        buttons[j].addEventListener("click", handleRegenerate);
+      }
+    })();
+  </script>
+{% endblock %}

app/apps/accounts/views.py

@@ -1,16 +1,72 @@
-from django.contrib.auth.decorators import login_required
-from django.shortcuts import render
 from django.conf import settings
-from django.shortcuts import redirect
-from django.contrib.auth import views as auth_views
 from django.contrib.auth import logout
+from django.contrib.auth import views as auth_views
+from django.contrib.auth.decorators import login_required
+from django.core.exceptions import ValidationError
+from django.db import IntegrityError
+from django.shortcuts import redirect, render
+
+from apps.keys.certificates import issue_certificate_for_key
+from apps.keys.models import SSHKey
+
+from .forms import ErasureRequestForm, SSHKeyForm
+from .models import ErasureRequest
 
 
 @login_required(login_url="/accounts/login/")
 def profile(request):
+  erasure_request = (
+    ErasureRequest.objects.filter(user=request.user).order_by("-requested_at").first()
+  )
+  can_add_key = request.user.has_perm("keys.add_sshkey")
+  if request.method == "POST":
+    form_type = request.POST.get("form_type")
+    if form_type == "ssh_key":
+      erasure_form = ErasureRequestForm()
+      key_form = SSHKeyForm(request.POST)
+      if key_form.is_valid():
+        if not can_add_key:
+          key_form.add_error(None, "You do not have permission to add SSH keys.")
+        else:
+          name = key_form.cleaned_data["name"].strip()
+          public_key = key_form.cleaned_data["public_key"].strip()
+          key = SSHKey(user=request.user, name=name)
+          try:
+            key.set_public_key(public_key)
+            key.save()
+            issue_certificate_for_key(key, created_by=request.user)
+            return redirect("accounts:profile")
+          except ValidationError as exc:
+            key_form.add_error("public_key", str(exc))
+          except IntegrityError:
+            key_form.add_error("public_key", "Key already exists.")
+          except Exception:
+            key_form.add_error(None, "Certificate issuance failed.")
+    else:
+      key_form = SSHKeyForm()
+      erasure_form = ErasureRequestForm(request.POST)
+      if erasure_form.is_valid():
+        if erasure_request and erasure_request.status == ErasureRequest.Status.PENDING:
+          erasure_form.add_error(None, "You already have a pending erasure request.")
+        else:
+          ErasureRequest.objects.create(
+            user=request.user,
+            reason=erasure_form.cleaned_data["reason"].strip(),
+          )
+          return redirect("accounts:profile")
+  else:
+    erasure_form = ErasureRequestForm()
+    key_form = SSHKeyForm()
+
+  ssh_keys = SSHKey.objects.filter(user=request.user).order_by("-created_at")
   context = {
     "user": request.user,
     "auth_mode": getattr(settings, "KEYWARDEN_AUTH_MODE", "hybrid"),
+    "erasure_request": erasure_request,
+    "erasure_form": erasure_form,
+    "key_form": key_form,
+    "ssh_keys": ssh_keys,
+    "can_add_key": can_add_key,
   }
   return render(request, "accounts/profile.html", context)
 
@@ -26,4 +82,3 @@ def login_view(request):
 def logout_view(request):
   logout(request)
   return redirect(getattr(settings, "LOGOUT_REDIRECT_URL", "/"))
-

app/apps/audit/admin.py

@@ -1,17 +1,140 @@
+import json
+
+from django import forms
 from django.contrib import admin
 from unfold.admin import ModelAdmin
-from unfold.decorators import action  # type: ignore
 
+from .matching import list_api_endpoint_suggestions, list_websocket_endpoint_suggestions
 from .models import AuditEventType, AuditLog
 
 
+class AuditEventTypeAdminForm(forms.ModelForm):
+    endpoints_text = forms.CharField(
+        required=False,
+        widget=forms.Textarea(
+            attrs={
+                "rows": 8,
+                "placeholder": "/api/v1/servers/\nGET /api/v1/servers/<int:server_id>/\n/ws/servers/*/shell/",
+            }
+        ),
+        help_text=(
+            "One endpoint pattern per line. Supports '*' wildcards and optional METHOD prefixes "
+            "like 'GET /api/v1/servers/*'."
+        ),
+        label="Endpoint patterns",
+    )
+    ip_whitelist_text = forms.CharField(
+        required=False,
+        widget=forms.Textarea(attrs={"rows": 4, "placeholder": "10.0.0.1\n192.168.1.0/24"}),
+        help_text="One IP address or CIDR range per line.",
+        label="IP whitelist entries",
+    )
+    ip_blacklist_text = forms.CharField(
+        required=False,
+        widget=forms.Textarea(attrs={"rows": 4, "placeholder": "203.0.113.10\n198.51.100.0/24"}),
+        help_text="One IP address or CIDR range per line.",
+        label="IP blacklist entries",
+    )
+
+    class Meta:
+        model = AuditEventType
+        fields = (
+            "key",
+            "title",
+            "description",
+            "kind",
+            "default_severity",
+            "endpoints_text",
+            "ip_whitelist_enabled",
+            "ip_whitelist_text",
+            "ip_blacklist_enabled",
+            "ip_blacklist_text",
+        )
+
+    class Media:
+        js = ("audit/eventtype_form.js",)
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        instance = kwargs.get("instance") or getattr(self, "instance", None)
+        if instance and instance.pk:
+            self.fields["endpoints_text"].initial = "\n".join(instance.endpoints or [])
+            self.fields["ip_whitelist_text"].initial = "\n".join(instance.ip_whitelist or [])
+            self.fields["ip_blacklist_text"].initial = "\n".join(instance.ip_blacklist or [])
+        self.fields["endpoints_text"].widget.attrs["data-api-suggestions"] = json.dumps(
+            list_api_endpoint_suggestions()
+        )
+        self.fields["endpoints_text"].widget.attrs["data-ws-suggestions"] = json.dumps(
+            list_websocket_endpoint_suggestions()
+        )
+
+    def _lines_to_list(self, value: str) -> list[str]:
+        results: list[str] = []
+        for line in (value or "").splitlines():
+            candidate = line.strip()
+            if candidate:
+                results.append(candidate)
+        return results
+
+    def clean_endpoints_text(self) -> str:
+        value = self.cleaned_data.get("endpoints_text", "")
+        # Normalize whitespace but keep the raw text for display.
+        lines = self._lines_to_list(value)
+        return "\n".join(lines)
+
+    def save(self, commit: bool = True):
+        instance: AuditEventType = super().save(commit=False)
+        endpoints_text = self.cleaned_data.get("endpoints_text", "")
+        whitelist_text = self.cleaned_data.get("ip_whitelist_text", "")
+        blacklist_text = self.cleaned_data.get("ip_blacklist_text", "")
+        instance.endpoints = self._lines_to_list(endpoints_text)
+        instance.ip_whitelist = self._lines_to_list(whitelist_text)
+        instance.ip_blacklist = self._lines_to_list(blacklist_text)
+        if commit:
+            instance.save()
+        return instance
+
+
 @admin.register(AuditEventType)
 class AuditEventTypeAdmin(ModelAdmin):
-    list_display = ("key", "title", "default_severity", "created_at")
-    search_fields = ("key", "title", "description")
-    list_filter = ("default_severity",)
+    form = AuditEventTypeAdminForm
+    list_display = ("key", "title", "kind", "default_severity", "created_at")
+    search_fields = ("key", "title", "description", "endpoints")
+    list_filter = ("kind", "default_severity", "ip_whitelist_enabled", "ip_blacklist_enabled")
     ordering = ("key",)
     compressed_fields = True
+    fieldsets = (
+        (
+            "Event Type",
+            {
+                "fields": (
+                    "key",
+                    "title",
+                    "description",
+                    "kind",
+                    "default_severity",
+                )
+            },
+        ),
+        (
+            "Endpoints",
+            {
+                "fields": ("endpoints_text",),
+                "description": "Only matching endpoints will create audit events.",
+            },
+        ),
+        (
+            "IP Controls",
+            {
+                "fields": (
+                    "ip_whitelist_enabled",
+                    "ip_whitelist_text",
+                    "ip_blacklist_enabled",
+                    "ip_blacklist_text",
+                ),
+            },
+        ),
+    )
 
 
 @admin.register(AuditLog)
@@ -87,5 +210,3 @@ class AuditLogAdmin(ModelAdmin):
             {"fields": ("metadata",)},
         ),
     )
-
-

app/apps/audit/apps.py

@@ -1,4 +1,5 @@
 from django.apps import AppConfig
+from django.db.models.signals import post_delete, post_save
 
 
 class AuditConfig(AppConfig):
@@ -10,6 +11,10 @@ class AuditConfig(AppConfig):
     def ready(self) -> None:
         # Import signal handlers
         from . import signals  # noqa: F401
+        from .matching import clear_event_type_cache
+        from .models import AuditEventType
+
+        post_save.connect(clear_event_type_cache, sender=AuditEventType)
+        post_delete.connect(clear_event_type_cache, sender=AuditEventType)
         return super().ready()
 
-

app/apps/audit/matching.py

@@ -0,0 +1,231 @@
+from __future__ import annotations
+
+import fnmatch
+import ipaddress
+import re
+import time
+from dataclasses import dataclass
+from typing import Iterable
+
+from django.urls import URLPattern, URLResolver, get_resolver
+
+from .models import AuditEventType
+
+_CACHE_TTL_SECONDS = 15.0
+_METHOD_RE = re.compile(r"^(GET|POST|PUT|PATCH|DELETE|OPTIONS|HEAD)\s+(.+)$", re.IGNORECASE)
+_REGEX_GROUP_RE = re.compile(r"\(\?P<(?P<name>\w+)>[^)]+\)")
+_CONVERTER_RE = re.compile(r"<(?:(?P<converter>[^:>]+):)?(?P<name>[^>]+)>")
+
+
+@dataclass(frozen=True)
+class ParsedEndpointPattern:
+    method: str | None
+    pattern: str
+
+
+def _normalize_path(value: str) -> str:
+    candidate = (value or "").strip()
+    if not candidate:
+        return ""
+    if "?" in candidate:
+        candidate = candidate.split("?", 1)[0]
+    if not candidate.startswith("/"):
+        candidate = f"/{candidate}"
+    # Collapse duplicate slashes without being clever.
+    while "//" in candidate:
+        candidate = candidate.replace("//", "/")
+    return candidate
+
+
+def _strip_regex_anchors(value: str) -> str:
+    candidate = value.strip()
+    if candidate.startswith("^"):
+        candidate = candidate[1:]
+    if candidate.endswith("$"):
+        candidate = candidate[:-1]
+    return candidate
+
+
+def _placeholder_to_wildcard(value: str) -> str:
+    candidate = _strip_regex_anchors(value)
+    candidate = _REGEX_GROUP_RE.sub("*", candidate)
+    candidate = _CONVERTER_RE.sub("*", candidate)
+    return candidate
+
+
+def parse_endpoint_pattern(raw_pattern: str) -> ParsedEndpointPattern | None:
+    # Parse admin-provided patterns like:
+    # - "/api/v1/servers/*"
+    # - "GET /api/v1/servers/<int:server_id>/"
+    # We normalize both Django-style placeholders and regex routes into
+    # fnmatch-friendly wildcard patterns.
+    if not raw_pattern:
+        return None
+    raw = raw_pattern.strip()
+    if not raw:
+        return None
+    method: str | None = None
+    endpoint = raw
+    match = _METHOD_RE.match(raw)
+    if match:
+        method = match.group(1).upper()
+        endpoint = match.group(2)
+    endpoint = _normalize_path(_placeholder_to_wildcard(endpoint))
+    if not endpoint:
+        return None
+    return ParsedEndpointPattern(method=method, pattern=endpoint)
+
+
+def _endpoint_matches_pattern(pattern: ParsedEndpointPattern, method: str, route: str, path: str) -> bool:
+    if pattern.method and pattern.method != method.upper():
+        return False
+    route_norm = _normalize_path(route)
+    path_norm = _normalize_path(path)
+    return fnmatch.fnmatch(route_norm, pattern.pattern) or fnmatch.fnmatch(path_norm, pattern.pattern)
+
+
+def _parse_ip_entry(
+    entry: str,
+) -> ipaddress.IPv4Address | ipaddress.IPv6Address | ipaddress.IPv4Network | ipaddress.IPv6Network | None:
+    raw = (entry or "").strip()
+    if not raw:
+        return None
+    try:
+        if "/" in raw:
+            return ipaddress.ip_network(raw, strict=False)
+        return ipaddress.ip_address(raw)
+    except ValueError:
+        return None
+
+
+def _ip_in_entries(ip: str, entries: Iterable[str]) -> bool:
+    try:
+        candidate_ip = ipaddress.ip_address(ip)
+    except ValueError:
+        return False
+    for entry in entries:
+        parsed = _parse_ip_entry(entry)
+        if parsed is None:
+            continue
+        if isinstance(parsed, (ipaddress.IPv4Network, ipaddress.IPv6Network)):
+            if candidate_ip in parsed:
+                return True
+        elif candidate_ip == parsed:
+            return True
+    return False
+
+
+def ip_allowed_for_event(event_type: AuditEventType, ip: str | None) -> bool:
+    # Apply whitelist first (default deny when enabled), then blacklist
+    # (explicit deny). If the IP cannot be determined, we only allow it
+    # when no whitelist is enforced.
+    if not ip:
+        # If we cannot determine the IP, allow by default unless a whitelist is enforced.
+        return not event_type.ip_whitelist_enabled
+    if event_type.ip_whitelist_enabled and not _ip_in_entries(ip, event_type.ip_whitelist or []):
+        return False
+    if event_type.ip_blacklist_enabled and _ip_in_entries(ip, event_type.ip_blacklist or []):
+        return False
+    return True
+
+
+def endpoint_matches_event(event_type: AuditEventType, method: str, route: str, path: str) -> bool:
+    # Event types are opt-in: an empty endpoint list never matches.
+    # We allow either the resolved Django route or the raw path to match
+    # so patterns can be authored using whichever is more stable.
+    patterns = event_type.endpoints or []
+    if not patterns:
+        return False
+    for raw_pattern in patterns:
+        parsed = parse_endpoint_pattern(str(raw_pattern))
+        if parsed and _endpoint_matches_pattern(parsed, method, route, path):
+            return True
+    return False
+
+
+_EVENT_TYPE_CACHE: dict[str, tuple[float, list[AuditEventType]]] = {}
+
+
+def clear_event_type_cache(*_args, **_kwargs) -> None:
+    _EVENT_TYPE_CACHE.clear()
+
+
+def get_event_types_for_kind(kind: str) -> list[AuditEventType]:
+    # Cache event-type catalogs briefly to avoid repeated DB hits on
+    # high-volume request paths. The cache is cleared on save/delete.
+    now = time.monotonic()
+    cached = _EVENT_TYPE_CACHE.get(kind)
+    if cached and (now - cached[0]) < _CACHE_TTL_SECONDS:
+        return cached[1]
+    event_types = list(AuditEventType.objects.filter(kind=kind).order_by("key"))
+    _EVENT_TYPE_CACHE[kind] = (now, event_types)
+    return event_types
+
+
+def find_matching_event_type(kind: str, method: str, route: str, path: str, ip: str | None) -> AuditEventType | None:
+    # Deterministic first-match semantics: the ordered catalog defines
+    # precedence when multiple event types could match.
+    for event_type in get_event_types_for_kind(kind):
+        if not endpoint_matches_event(event_type, method=method, route=route, path=path):
+            continue
+        if not ip_allowed_for_event(event_type, ip):
+            continue
+        return event_type
+    return None
+
+
+def _join_paths(prefix: str, segment: str) -> str:
+    if not prefix:
+        return segment
+    if not segment:
+        return prefix
+    return f"{prefix.rstrip('/')}/{segment.lstrip('/')}"
+
+
+def _walk_urlpatterns(patterns: Iterable[URLPattern | URLResolver], prefix: str = "") -> list[str]:
+    # Flatten the resolver tree into full route strings so the admin
+    # UI can offer endpoint suggestions without hardcoding routes.
+    results: list[str] = []
+    for pattern in patterns:
+        segment = str(pattern.pattern)
+        combined = _join_paths(prefix, segment)
+        if isinstance(pattern, URLResolver):
+            results.extend(_walk_urlpatterns(pattern.url_patterns, combined))
+        else:
+            results.append(combined)
+    return results
+
+
+def _normalize_suggestion(value: str) -> str:
+    candidate = _strip_regex_anchors(value)
+    candidate = candidate.replace("\\", "")
+    candidate = _REGEX_GROUP_RE.sub(lambda m: f"<{m.group('name')}>", candidate)
+    candidate = _normalize_path(candidate)
+    return candidate
+
+
+def list_api_endpoint_suggestions() -> list[str]:
+    # Introspect the URL resolver and keep only API routes. Suggestions
+    # are normalized to human-editable patterns (e.g., "<server_id>").
+    resolver = get_resolver()
+    raw_patterns = _walk_urlpatterns(resolver.url_patterns)
+    suggestions: set[str] = set()
+    for pattern in raw_patterns:
+        if not pattern:
+            continue
+        normalized = _normalize_suggestion(pattern)
+        if normalized.startswith("/api"):
+            suggestions.add(normalized)
+    return sorted(s for s in suggestions if s)
+
+
+def list_websocket_endpoint_suggestions() -> list[str]:
+    # WebSocket routes are maintained separately by Channels, so we
+    # import them directly from the ASGI routing module.
+    try:
+        from keywarden.routing import websocket_urlpatterns
+    except Exception:
+        return []
+    raw_patterns = [str(p.pattern) for p in websocket_urlpatterns]
+    suggestions = {_normalize_suggestion(p) for p in raw_patterns}
+    return sorted(s for s in suggestions if s)

app/apps/audit/middleware.py

@@ -0,0 +1,103 @@
+from __future__ import annotations
+
+import time
+
+from django.utils import timezone
+
+from .matching import find_matching_event_type
+from .models import AuditEventType, AuditLog
+from .utils import get_client_ip, get_request_id
+
+_SKIP_PREFIXES = ("/api/v1/audit", "/api/v1/user")
+_SKIP_SUFFIXES = ("/health", "/health/")
+
+def _is_api_request(path: str) -> bool:
+    return path == "/api" or path.startswith("/api/")
+
+
+def _should_log_request(path: str) -> bool:
+    # Only audit API traffic and skip endpoints that would recursively
+    # generate noisy audit events (audit endpoints, health checks, etc.).
+    if not _is_api_request(path):
+        return False
+    if path in _SKIP_PREFIXES:
+        return False
+    if any(path.startswith(prefix + "/") for prefix in _SKIP_PREFIXES):
+        return False
+    if any(path.endswith(suffix) for suffix in _SKIP_SUFFIXES):
+        return False
+    return True
+
+
+def _resolve_route(request, fallback: str) -> str:
+    match = getattr(request, "resolver_match", None)
+    route = getattr(match, "route", None) if match else None
+    if route:
+        return route if route.startswith("/") else f"/{route}"
+    return fallback
+
+
+class ApiAuditLogMiddleware:
+    def __init__(self, get_response):
+        self.get_response = get_response
+
+    def __call__(self, request):
+        # Fast-exit for non-audited paths before taking timing measurements.
+        path = request.path_info or request.path
+        if not _should_log_request(path):
+            return self.get_response(request)
+
+        start = time.monotonic()
+        try:
+            response = self.get_response(request)
+        except Exception as exc:
+            duration_ms = int((time.monotonic() - start) * 1000)
+            self._write_log(request, path, 500, duration_ms, error=type(exc).__name__)
+            raise
+
+        duration_ms = int((time.monotonic() - start) * 1000)
+        self._write_log(request, path, response.status_code, duration_ms)
+        return response
+
+    def _write_log(self, request, path: str, status_code: int, duration_ms: int, error: str | None = None) -> None:
+        try:
+            route = _resolve_route(request, path)
+            client_ip = get_client_ip(request)
+            # Audit events are explicit: if no configured event type matches,
+            # we do not create either an event type or a log entry.
+            event_type = find_matching_event_type(
+                kind=AuditEventType.Kind.API,
+                method=request.method,
+                route=route,
+                path=path,
+                ip=client_ip,
+            )
+            if event_type is None:
+                return
+            user = getattr(request, "user", None)
+            actor = user if getattr(user, "is_authenticated", False) else None
+            # Store normalized request context for filtering and forensics.
+            metadata = {
+                "method": request.method,
+                "path": path,
+                "route": route,
+                "status_code": status_code,
+                "duration_ms": duration_ms,
+                "query_string": request.META.get("QUERY_STRING", ""),
+            }
+            if error:
+                metadata["error"] = error
+            AuditLog.objects.create(
+                created_at=timezone.now(),
+                actor=actor,
+                event_type=event_type,
+                message=f"API request {request.method} {route} -> {status_code}",
+                severity=event_type.default_severity,
+                source=AuditLog.Source.API,
+                ip_address=client_ip,
+                user_agent=request.META.get("HTTP_USER_AGENT", ""),
+                request_id=get_request_id(request),
+                metadata=metadata,
+            )
+        except Exception:
+            return

app/apps/audit/migrations/0003_auditeventtype_kind_and_filters.py

@@ -0,0 +1,69 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("audit", "0002_alter_auditlog_event_type"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="auditeventtype",
+            name="kind",
+            field=models.CharField(
+                choices=[("api", "API"), ("websocket", "WebSocket")],
+                db_index=True,
+                default="api",
+                help_text="Whether this event type applies to API or WebSocket traffic.",
+                max_length=16,
+            ),
+        ),
+        migrations.AddField(
+            model_name="auditeventtype",
+            name="endpoints",
+            field=models.JSONField(
+                blank=True,
+                default=list,
+                help_text=(
+                    "List of endpoint patterns that should generate this event type. "
+                    "Use one pattern per line in the admin form. Supports '*' wildcards "
+                    "and optional METHOD prefixes like 'GET /api/v1/servers/*'."
+                ),
+            ),
+        ),
+        migrations.AddField(
+            model_name="auditeventtype",
+            name="ip_whitelist_enabled",
+            field=models.BooleanField(
+                default=False,
+                help_text="If enabled, only IPs in the whitelist will generate this event type.",
+            ),
+        ),
+        migrations.AddField(
+            model_name="auditeventtype",
+            name="ip_whitelist",
+            field=models.JSONField(
+                blank=True,
+                default=list,
+                help_text="List of allowed IP addresses or CIDR ranges. One per line in the admin form.",
+            ),
+        ),
+        migrations.AddField(
+            model_name="auditeventtype",
+            name="ip_blacklist_enabled",
+            field=models.BooleanField(
+                default=False,
+                help_text="If enabled, IPs in the blacklist will be blocked for this event type.",
+            ),
+        ),
+        migrations.AddField(
+            model_name="auditeventtype",
+            name="ip_blacklist",
+            field=models.JSONField(
+                blank=True,
+                default=list,
+                help_text="List of denied IP addresses or CIDR ranges. One per line in the admin form.",
+            ),
+        ),
+    ]

app/apps/audit/models.py

@@ -13,6 +13,10 @@ class AuditEventType(models.Model):
     Useful for consistent naming, severity, and descriptions.
     """
 
+    class Kind(models.TextChoices):
+        API = "api", "API"
+        WEBSOCKET = "websocket", "WebSocket"
+
     class Severity(models.TextChoices):
         INFO = "info", "Info"
         WARNING = "warning", "Warning"
@@ -22,9 +26,43 @@ class AuditEventType(models.Model):
     key = models.SlugField(max_length=64, unique=True, help_text="Stable machine key, e.g., user_login")
     title = models.CharField(max_length=128, help_text="Human-readable title")
     description = models.TextField(blank=True)
+    kind = models.CharField(
+        max_length=16,
+        choices=Kind.choices,
+        default=Kind.API,
+        db_index=True,
+        help_text="Whether this event type applies to API or WebSocket traffic.",
+    )
     default_severity = models.CharField(
         max_length=16, choices=Severity.choices, default=Severity.INFO, db_index=True
     )
+    endpoints = models.JSONField(
+        default=list,
+        blank=True,
+        help_text=(
+            "List of endpoint patterns that should generate this event type. "
+            "Use one pattern per line in the admin form. Supports '*' wildcards "
+            "and optional METHOD prefixes like 'GET /api/v1/servers/*'."
+        ),
+    )
+    ip_whitelist_enabled = models.BooleanField(
+        default=False,
+        help_text="If enabled, only IPs in the whitelist will generate this event type.",
+    )
+    ip_whitelist = models.JSONField(
+        default=list,
+        blank=True,
+        help_text="List of allowed IP addresses or CIDR ranges. One per line in the admin form.",
+    )
+    ip_blacklist_enabled = models.BooleanField(
+        default=False,
+        help_text="If enabled, IPs in the blacklist will be blocked for this event type.",
+    )
+    ip_blacklist = models.JSONField(
+        default=list,
+        blank=True,
+        help_text="List of denied IP addresses or CIDR ranges. One per line in the admin form.",
+    )
     created_at = models.DateTimeField(default=timezone.now, editable=False)
 
     class Meta:
@@ -33,7 +71,7 @@ class AuditEventType(models.Model):
         ordering = ["key"]
 
     def __str__(self) -> str:
-        return f"{self.key} ({self.default_severity})"
+        return f"{self.key} [{self.kind}] ({self.default_severity})"
 
 
 class AuditLog(models.Model):
@@ -109,4 +147,4 @@ class AuditLog(models.Model):
 
     def __str__(self) -> str:
         actor = getattr(self.actor, "username", "system")
-        return f"[{self.created_at:%Y-%m-%d %H:%M:%S}] {actor}: {self.message}"
+        return f"[{self.created_at:%Y-%m-%d %H:%M:%S}] {actor}: {self.message}"

app/apps/audit/signals.py

@@ -6,21 +6,23 @@ from django.dispatch import receiver
 from django.utils import timezone
 
 from .models import AuditEventType, AuditLog
+from .utils import get_client_ip
 
 User = get_user_model()
 
 
-def _get_or_create_event(key: str, title: str, severity: str = AuditEventType.Severity.INFO) -> AuditEventType:
-    event, _ = AuditEventType.objects.get_or_create(
-        key=key,
-        defaults={"title": title, "default_severity": severity},
-    )
-    return event
+def _get_event(key: str) -> AuditEventType | None:
+    try:
+        return AuditEventType.objects.get(key=key)
+    except AuditEventType.DoesNotExist:
+        return None
 
 
 @receiver(user_logged_in)
 def on_user_logged_in(sender, request, user: User, **kwargs):
-    event = _get_or_create_event("user_login", "User logged in", AuditEventType.Severity.INFO)
+    event = _get_event("user_login")
+    if event is None:
+        return
     AuditLog.objects.create(
         created_at=timezone.now(),
         actor=user,
@@ -28,7 +30,7 @@ def on_user_logged_in(sender, request, user: User, **kwargs):
         message=f"User {user} logged in",
         severity=event.default_severity,
         source=AuditLog.Source.UI,
-        ip_address=(request.META.get("REMOTE_ADDR") if request else None),
+        ip_address=get_client_ip(request),
         user_agent=(request.META.get("HTTP_USER_AGENT") if request else ""),
         metadata={"path": request.path} if request else {},
     )
@@ -36,7 +38,9 @@ def on_user_logged_in(sender, request, user: User, **kwargs):
 
 @receiver(user_logged_out)
 def on_user_logged_out(sender, request, user: User, **kwargs):
-    event = _get_or_create_event("user_logout", "User logged out", AuditEventType.Severity.INFO)
+    event = _get_event("user_logout")
+    if event is None:
+        return
     AuditLog.objects.create(
         created_at=timezone.now(),
         actor=user,
@@ -44,9 +48,7 @@ def on_user_logged_out(sender, request, user: User, **kwargs):
         message=f"User {user} logged out",
         severity=event.default_severity,
         source=AuditLog.Source.UI,
-        ip_address=(request.META.get("REMOTE_ADDR") if request else None),
+        ip_address=get_client_ip(request),
         user_agent=(request.META.get("HTTP_USER_AGENT") if request else ""),
         metadata={"path": request.path} if request else {},
     )
-
-

app/apps/audit/static/audit/eventtype_form.js

@@ -0,0 +1,93 @@
+(function () {
+  function parseSuggestions(textarea, key) {
+    try {
+      var raw = textarea.dataset[key];
+      return raw ? JSON.parse(raw) : [];
+    } catch (err) {
+      return [];
+    }
+  }
+
+  function splitLines(value) {
+    return (value || "")
+      .split(/\r?\n/)
+      .map(function (line) {
+        return line.trim();
+      })
+      .filter(function (line) {
+        return line.length > 0;
+      });
+  }
+
+  function appendLine(textarea, value) {
+    var lines = splitLines(textarea.value);
+    if (lines.indexOf(value) !== -1) {
+      return;
+    }
+    lines.push(value);
+    textarea.value = lines.join("\n");
+    textarea.dispatchEvent(new Event("change", { bubbles: true }));
+  }
+
+  document.addEventListener("DOMContentLoaded", function () {
+    var textarea = document.getElementById("id_endpoints_text");
+    var kindSelect = document.getElementById("id_kind");
+    if (!textarea || !kindSelect) {
+      return;
+    }
+
+    var apiSuggestions = parseSuggestions(textarea, "apiSuggestions");
+    var wsSuggestions = parseSuggestions(textarea, "wsSuggestions");
+
+    var container = document.createElement("div");
+    container.className = "audit-endpoint-suggestions";
+    container.style.marginTop = "0.5rem";
+
+    var title = document.createElement("div");
+    title.style.fontWeight = "600";
+    title.style.marginBottom = "0.25rem";
+    title.textContent = "Suggested endpoints";
+    container.appendChild(title);
+
+    var list = document.createElement("div");
+    list.style.display = "flex";
+    list.style.flexWrap = "wrap";
+    list.style.gap = "0.25rem";
+    container.appendChild(list);
+
+    textarea.parentNode.insertBefore(container, textarea.nextSibling);
+
+    function currentSuggestions() {
+      return kindSelect.value === "websocket" ? wsSuggestions : apiSuggestions;
+    }
+
+    function renderSuggestions() {
+      var suggestions = currentSuggestions();
+      list.innerHTML = "";
+      if (!suggestions || suggestions.length === 0) {
+        var empty = document.createElement("span");
+        empty.textContent = "No endpoint suggestions were found.";
+        empty.style.opacity = "0.7";
+        list.appendChild(empty);
+        return;
+      }
+      suggestions.slice(0, 40).forEach(function (suggestion) {
+        var button = document.createElement("button");
+        button.type = "button";
+        button.textContent = suggestion;
+        button.style.padding = "0.2rem 0.45rem";
+        button.style.borderRadius = "999px";
+        button.style.border = "1px solid #d1d5db";
+        button.style.background = "#f9fafb";
+        button.style.cursor = "pointer";
+        button.addEventListener("click", function () {
+          appendLine(textarea, suggestion);
+        });
+        list.appendChild(button);
+      });
+    }
+
+    kindSelect.addEventListener("change", renderSuggestions);
+    renderSuggestions();
+  });
+})();

app/apps/audit/tests/test_api_audit_middleware.py

@@ -0,0 +1,86 @@
+from __future__ import annotations
+
+from django.http import HttpResponse
+from django.test import RequestFactory, TestCase
+
+from apps.audit.matching import find_matching_event_type
+from apps.audit.middleware import ApiAuditLogMiddleware
+from apps.audit.models import AuditEventType, AuditLog
+
+
+class ApiAuditMiddlewareTests(TestCase):
+    def setUp(self) -> None:
+        super().setUp()
+        self.factory = RequestFactory()
+        self.middleware = ApiAuditLogMiddleware(lambda request: HttpResponse("ok"))
+
+    def _call(self, method: str, path: str, ip: str = "203.0.113.5") -> None:
+        request = self.factory.generic(method, path)
+        request.META["REMOTE_ADDR"] = ip
+        self.middleware(request)
+
+    def test_no_matching_event_type_creates_no_logs_or_event_types(self) -> None:
+        self._call("GET", "/api/auto/")
+        self.assertEqual(AuditEventType.objects.count(), 0)
+        self.assertEqual(AuditLog.objects.count(), 0)
+
+    def test_matching_event_type_creates_log(self) -> None:
+        event_type = AuditEventType.objects.create(
+            key="api_test",
+            title="API test",
+            kind=AuditEventType.Kind.API,
+            endpoints=["/api/test/"],
+        )
+        self._call("GET", "/api/test/")
+        log = AuditLog.objects.get()
+        self.assertEqual(log.event_type_id, event_type.id)
+        self.assertEqual(log.source, AuditLog.Source.API)
+        self.assertEqual(log.severity, event_type.default_severity)
+
+    def test_ip_whitelist_blocks_and_allows(self) -> None:
+        AuditEventType.objects.create(
+            key="api_whitelist",
+            title="API whitelist",
+            kind=AuditEventType.Kind.API,
+            endpoints=["/api/whitelist/"],
+            ip_whitelist_enabled=True,
+            ip_whitelist=["203.0.113.10"],
+        )
+
+        self._call("GET", "/api/whitelist/", ip="203.0.113.5")
+        self.assertEqual(AuditLog.objects.count(), 0)
+
+        self._call("GET", "/api/whitelist/", ip="203.0.113.10")
+        self.assertEqual(AuditLog.objects.count(), 1)
+
+    def test_ip_blacklist_blocks(self) -> None:
+        AuditEventType.objects.create(
+            key="api_blacklist",
+            title="API blacklist",
+            kind=AuditEventType.Kind.API,
+            endpoints=["/api/blacklist/"],
+            ip_blacklist_enabled=True,
+            ip_blacklist=["203.0.113.5"],
+        )
+
+        self._call("GET", "/api/blacklist/", ip="203.0.113.5")
+        self.assertEqual(AuditLog.objects.count(), 0)
+
+
+class AuditEventMatchingTests(TestCase):
+    def test_websocket_event_type_can_match(self) -> None:
+        event_type = AuditEventType.objects.create(
+            key="ws_shell",
+            title="WebSocket shell",
+            kind=AuditEventType.Kind.WEBSOCKET,
+            endpoints=["/ws/servers/*/shell/"],
+        )
+        matched = find_matching_event_type(
+            kind=AuditEventType.Kind.WEBSOCKET,
+            method="GET",
+            route="/ws/servers/123/shell/",
+            path="/ws/servers/123/shell/",
+            ip="203.0.113.10",
+        )
+        self.assertIsNotNone(matched)
+        self.assertEqual(matched.id, event_type.id)

app/apps/audit/utils.py

@@ -0,0 +1,92 @@
+from __future__ import annotations
+
+import ipaddress
+
+
+def _normalize_ip(value: str | None) -> str | None:
+    if not value:
+        return None
+    candidate = value.strip()
+    if not candidate:
+        return None
+    if candidate.startswith("[") and "]" in candidate:
+        candidate = candidate[1 : candidate.index("]")]
+    elif candidate.count(":") == 1 and candidate.rsplit(":", 1)[1].isdigit():
+        candidate = candidate.rsplit(":", 1)[0]
+    try:
+        return str(ipaddress.ip_address(candidate))
+    except ValueError:
+        return None
+
+
+def get_client_ip(request) -> str | None:
+    if not request:
+        return None
+    x_real_ip = _normalize_ip(request.META.get("HTTP_X_REAL_IP"))
+    if x_real_ip:
+        return x_real_ip
+    forwarded_for = request.META.get("HTTP_X_FORWARDED_FOR", "")
+    if forwarded_for:
+        for part in forwarded_for.split(","):
+            ip = _normalize_ip(part)
+            if ip:
+                return ip
+    return _normalize_ip(request.META.get("REMOTE_ADDR"))
+
+
+def get_request_id(request) -> str:
+    if not request:
+        return ""
+    return (
+        request.META.get("HTTP_X_REQUEST_ID")
+        or request.META.get("HTTP_X_CORRELATION_ID")
+        or ""
+    )
+
+
+def _get_scope_header(scope, header_name: str) -> str | None:
+    headers = scope.get("headers") if scope else None
+    if not headers:
+        return None
+    target = header_name.lower().encode("latin-1")
+    for key, value in headers:
+        if key.lower() == target:
+            try:
+                return value.decode("latin-1")
+            except Exception:
+                return None
+    return None
+
+
+def get_client_ip_from_scope(scope) -> str | None:
+    if not scope:
+        return None
+    x_real_ip = _normalize_ip(_get_scope_header(scope, "x-real-ip"))
+    if x_real_ip:
+        return x_real_ip
+    forwarded_for = _get_scope_header(scope, "x-forwarded-for") or ""
+    if forwarded_for:
+        for part in forwarded_for.split(","):
+            ip = _normalize_ip(part)
+            if ip:
+                return ip
+    client = scope.get("client")
+    if isinstance(client, (list, tuple)) and client:
+        return _normalize_ip(str(client[0]))
+    return None
+
+
+def get_request_id_from_scope(scope) -> str:
+    if not scope:
+        return ""
+    return (
+        _get_scope_header(scope, "x-request-id")
+        or _get_scope_header(scope, "x-correlation-id")
+        or ""
+    )
+
+
+def get_user_agent_from_scope(scope) -> str:
+    if not scope:
+        return ""
+    return _get_scope_header(scope, "user-agent") or ""

app/apps/core/apps.py

@@ -0,0 +1,21 @@
+from __future__ import annotations
+
+from django.apps import AppConfig
+from django.db.models.signals import post_migrate
+
+
+class CoreConfig(AppConfig):
+    default_auto_field = "django.db.models.BigAutoField"
+    name = "apps.core"
+    label = "core"
+    verbose_name = "Core"
+
+    def ready(self) -> None:
+        from .rbac import assign_role_permissions, ensure_role_groups
+
+        def _ensure_roles(**_kwargs) -> None:
+            ensure_role_groups()
+            assign_role_permissions()
+
+        post_migrate.connect(_ensure_roles, dispatch_uid="core_rbac")
+        return super().ready()

app/apps/core/management/commands/ensure_admin.py

@@ -3,6 +3,8 @@ import os
 from django.contrib.auth import get_user_model
 from django.core.management.base import BaseCommand
 
+from apps.core.rbac import ROLE_ADMIN, set_user_role
+
 
 class Command(BaseCommand):
     help = "Ensure a Django superuser exists using environment variables"
@@ -41,6 +43,7 @@ class Command(BaseCommand):
 
         if created:
             user.set_password(password)
+            set_user_role(user, ROLE_ADMIN)
             user.save()
             self.stdout.write(self.style.SUCCESS(f"Superuser '{username}' created."))
             return
@@ -59,10 +62,11 @@ class Command(BaseCommand):
             user.is_superuser = True
             changed = True
 
+        set_user_role(user, ROLE_ADMIN)
+
         if changed:
             user.save()
             self.stdout.write(self.style.SUCCESS(f"Superuser '{username}' updated."))
         else:
             self.stdout.write(self.style.SUCCESS(f"Superuser '{username}' already present."))
 
-

app/apps/core/management/commands/sync_object_perms.py

@@ -0,0 +1,50 @@
+from django.core.management.base import BaseCommand
+
+from guardian.shortcuts import assign_perm
+
+from apps.access.models import AccessRequest
+from apps.core.rbac import assign_default_object_permissions
+from apps.keys.models import SSHKey
+from apps.servers.models import Server
+
+
+class Command(BaseCommand):
+    help = "Backfill guardian object permissions for access requests and SSH keys."
+
+    def handle(self, *args, **options):
+        access_count = 0
+        for access_request in AccessRequest.objects.select_related("requester"):
+            if not access_request.requester_id:
+                assign_default_object_permissions(access_request)
+            else:
+                for perm in (
+                    "access.view_accessrequest",
+                    "access.change_accessrequest",
+                ):
+                    assign_perm(perm, access_request.requester, access_request)
+                assign_default_object_permissions(access_request)
+            access_count += 1
+
+        key_count = 0
+        for key in SSHKey.objects.select_related("user"):
+            if not key.user_id:
+                assign_default_object_permissions(key)
+            else:
+                for perm in ("keys.view_sshkey", "keys.change_sshkey", "keys.delete_sshkey"):
+                    assign_perm(perm, key.user, key)
+                assign_default_object_permissions(key)
+            key_count += 1
+
+        server_count = 0
+        for server in Server.objects.all():
+            assign_default_object_permissions(server)
+            server_count += 1
+
+        self.stdout.write(
+            self.style.SUCCESS(
+                "Synced object permissions for "
+                f"{access_count} access requests, "
+                f"{key_count} SSH keys, "
+                f"and {server_count} servers."
+            )
+        )

app/apps/core/middleware.py

@@ -0,0 +1,20 @@
+from __future__ import annotations
+
+from django.http import HttpRequest, HttpResponse
+
+from .views import disguised_not_found
+
+
+class DisguiseNotFoundMiddleware:
+    """Mask 404 responses with a less-informative alternative."""
+
+    def __init__(self, get_response):
+        self.get_response = get_response
+
+    def __call__(self, request: HttpRequest) -> HttpResponse:
+        response = self.get_response(request)
+        if getattr(response, "status_code", None) != 404:
+            return response
+        # Replace all 404 responses, even when DEBUG=True, because Django's
+        # handler404 is bypassed in debug mode.
+        return disguised_not_found(request)

app/apps/core/rbac.py

@@ -0,0 +1,136 @@
+from __future__ import annotations
+
+from django.contrib.auth.models import Group, Permission
+from guardian.shortcuts import assign_perm
+from ninja.errors import HttpError
+
+ROLE_ADMIN = "administrator"
+ROLE_USER = "user"
+
+ROLE_ORDER = (ROLE_ADMIN, ROLE_USER)
+ROLE_ALL = ROLE_ORDER
+ROLE_ALIASES = {"admin": ROLE_ADMIN}
+ROLE_INPUTS = tuple(sorted(set(ROLE_ORDER) | set(ROLE_ALIASES.keys())))
+
+def _model_perms(app_label: str, model: str, actions: list[str]) -> list[str]:
+    return [f"{app_label}.{action}_{model}" for action in actions]
+
+
+ROLE_PERMISSIONS = {
+    ROLE_ADMIN: [],
+    ROLE_USER: [
+        *_model_perms("access", "accessrequest", ["add"]),
+        *_model_perms("keys", "sshkey", ["add"]),
+    ],
+}
+
+OBJECT_PERMISSION_MODELS = {
+    ("servers", "server"),
+    ("access", "accessrequest"),
+    ("keys", "sshkey"),
+}
+
+
+def normalize_role(role: str) -> str:
+    normalized = (role or "").strip().lower()
+    return ROLE_ALIASES.get(normalized, normalized)
+
+
+def ensure_role_groups() -> None:
+    for role in ROLE_ORDER:
+        Group.objects.get_or_create(name=role)
+
+
+def assign_role_permissions() -> None:
+    ensure_role_groups()
+    for role, perm_codes in ROLE_PERMISSIONS.items():
+        group = Group.objects.get(name=role)
+        if role == ROLE_ADMIN:
+            group.permissions.set(Permission.objects.all())
+            continue
+        perms = []
+        for code in perm_codes:
+            if "." not in code:
+                continue
+            app_label, codename = code.split(".", 1)
+            try:
+                perms.append(
+                    Permission.objects.get(
+                        content_type__app_label=app_label,
+                        codename=codename,
+                    )
+                )
+            except Permission.DoesNotExist:
+                continue
+        group.permissions.set(perms)
+
+
+def assign_default_object_permissions(instance) -> None:
+    app_label = instance._meta.app_label
+    model_name = instance._meta.model_name
+    if (app_label, model_name) not in OBJECT_PERMISSION_MODELS:
+        return
+    ensure_role_groups()
+    groups = {group.name: group for group in Group.objects.filter(name__in=ROLE_ORDER)}
+    for role, perm_codes in ROLE_PERMISSIONS.items():
+        if role == ROLE_ADMIN:
+            continue
+        group = groups.get(role)
+        if not group:
+            continue
+        for code in perm_codes:
+            if "." not in code:
+                continue
+            perm_app, codename = code.split(".", 1)
+            if perm_app != app_label:
+                continue
+            if not codename.endswith(f"_{model_name}"):
+                continue
+            if codename.startswith("add_"):
+                continue
+            assign_perm(code, group, instance)
+
+
+def get_user_role(user, default: str = ROLE_USER) -> str | None:
+    if not user or not getattr(user, "is_authenticated", False):
+        return None
+    if getattr(user, "is_superuser", False):
+        return ROLE_ADMIN
+    group_names = set(user.groups.values_list("name", flat=True))
+    for role in ROLE_ORDER:
+        if role in group_names:
+            return role
+    return default
+
+
+def set_user_role(user, role: str) -> str:
+    canonical = normalize_role(role)
+    if canonical not in ROLE_ORDER:
+        raise ValueError(f"Invalid role: {role}")
+    ensure_role_groups()
+    role_groups = list(Group.objects.filter(name__in=ROLE_ORDER))
+    if role_groups:
+        user.groups.remove(*role_groups)
+    target_group = Group.objects.get(name=canonical)
+    user.groups.add(target_group)
+    if canonical == ROLE_ADMIN:
+        user.is_staff = True
+        user.is_superuser = True
+    else:
+        user.is_staff = False
+        user.is_superuser = False
+    return canonical
+
+
+def require_authenticated(request) -> None:
+    user = getattr(request, "user", None)
+    if not user or not getattr(user, "is_authenticated", False):
+        raise HttpError(403, "Forbidden")
+
+
+def require_perms(request, *perms: str) -> None:
+    user = getattr(request, "user", None)
+    if not user or not getattr(user, "is_authenticated", False):
+        raise HttpError(403, "Forbidden")
+    if not user.has_perms(perms):
+        raise HttpError(403, "Forbidden")

app/apps/core/views.py

@@ -0,0 +1,27 @@
+from __future__ import annotations
+
+from django.http import HttpRequest, HttpResponse, HttpResponseRedirect, JsonResponse
+from django.urls import reverse
+from django.views.decorators.cache import never_cache
+
+
+@never_cache
+def disguised_not_found(request: HttpRequest, exception=None) -> HttpResponse:
+    """Return a less-informative response for unknown endpoints."""
+    path = request.path or ""
+    accepts = (request.META.get("HTTP_ACCEPT") or "").lower()
+    # Treat anything that looks API-like as a probe and return a generic
+    # auth-style response rather than a 404 page.
+    is_api_like = path.startswith("/api/") or "application/json" in accepts
+
+    if is_api_like:
+        # Avoid a 404 response for unknown API paths.
+        return JsonResponse({"detail": "Unauthorized."}, status=401)
+
+    try:
+        # For browser traffic, redirect to a known entry point so the
+        # response shape is predictable and uninformative.
+        target = reverse("servers:dashboard")
+    except Exception:
+        target = "/"
+    return HttpResponseRedirect(target)

app/apps/keys/admin.py

@@ -0,0 +1,37 @@
+from django.contrib import admin
+try:
+    from unfold.contrib.guardian.admin import GuardedModelAdmin
+except ImportError:  # Fallback for older Unfold builds without guardian admin shim.
+    from guardian.admin import GuardedModelAdmin as GuardianGuardedModelAdmin
+    from unfold.admin import ModelAdmin as UnfoldModelAdmin
+
+    class GuardedModelAdmin(GuardianGuardedModelAdmin, UnfoldModelAdmin):
+        pass
+
+from .models import SSHCertificate, SSHCertificateAuthority, SSHKey
+
+
+@admin.register(SSHKey)
+class SSHKeyAdmin(GuardedModelAdmin):
+    list_display = ("id", "user", "name", "key_type", "fingerprint", "is_active", "created_at")
+    list_filter = ("is_active", "key_type")
+    search_fields = ("name", "user__username", "user__email", "fingerprint")
+    ordering = ("-created_at",)
+
+
+@admin.register(SSHCertificateAuthority)
+class SSHCertificateAuthorityAdmin(admin.ModelAdmin):
+    list_display = ("name", "fingerprint", "is_active", "created_at", "revoked_at")
+    list_filter = ("is_active",)
+    search_fields = ("name", "fingerprint")
+    readonly_fields = ("created_at", "revoked_at", "fingerprint", "public_key", "private_key")
+    ordering = ("-created_at",)
+
+
+@admin.register(SSHCertificate)
+class SSHCertificateAdmin(admin.ModelAdmin):
+    list_display = ("id", "user", "key", "serial", "is_active", "valid_before", "created_at")
+    list_filter = ("is_active",)
+    search_fields = ("user__username", "user__email", "serial")
+    readonly_fields = ("created_at", "revoked_at", "certificate")
+    ordering = ("-created_at",)

app/apps/keys/apps.py

@@ -0,0 +1,11 @@
+from django.apps import AppConfig
+
+
+class KeysConfig(AppConfig):
+    default_auto_field = "django.db.models.BigAutoField"
+    name = "apps.keys"
+    verbose_name = "SSH Keys"
+
+    def ready(self) -> None:
+        from . import signals  # noqa: F401
+        return super().ready()

app/apps/keys/certificates.py

@@ -0,0 +1,159 @@
+from __future__ import annotations
+
+import os
+import re
+import secrets
+import subprocess
+import tempfile
+from datetime import timedelta
+
+from django.conf import settings
+from django.utils import timezone
+
+from .models import SSHCertificate, SSHCertificateAuthority, SSHKey
+from .utils import render_system_username
+
+
+def get_active_ca(created_by=None) -> SSHCertificateAuthority:
+    # Reuse the most recent active CA, or lazily create one if missing.
+    ca = (
+        SSHCertificateAuthority.objects.filter(is_active=True, revoked_at__isnull=True)
+        .order_by("-created_at")
+        .first()
+    )
+    if not ca:
+        ca = SSHCertificateAuthority(created_by=created_by)
+    ca.ensure_material()
+    ca.save()
+    return ca
+
+
+def issue_certificate_for_key(key: SSHKey, created_by=None) -> SSHCertificate:
+    if not key or not key.user_id:
+        raise ValueError("key must have a user")
+    ca = get_active_ca(created_by=created_by)
+    # Principal must match the system account used for SSH logins.
+    principal = render_system_username(key.user.username, key.user_id)
+    now = timezone.now()
+    valid_before = now + timedelta(days=settings.KEYWARDEN_USER_CERT_VALIDITY_DAYS)
+    # Serial should be unique and non-guessable for audit purposes.
+    serial = secrets.randbits(63)
+    safe_name = _sanitize_label(key.name or "key")
+    identity = f"keywarden-cert-{key.user_id}-{safe_name}-{key.id}"
+    cert_text = _sign_public_key(
+        ca_private_key=ca.private_key,
+        ca_public_key=ca.public_key,
+        public_key=key.public_key,
+        identity=identity,
+        principal=principal,
+        serial=serial,
+        validity_days=settings.KEYWARDEN_USER_CERT_VALIDITY_DAYS,
+        comment=identity,
+    )
+    cert, _ = SSHCertificate.objects.update_or_create(
+        key=key,
+        defaults={
+            "user": key.user,
+            "certificate": cert_text,
+            "serial": serial,
+            "principals": [principal],
+            "valid_after": now,
+            "valid_before": valid_before,
+            "revoked_at": None,
+            "is_active": True,
+        },
+    )
+    return cert
+
+
+def revoke_certificate_for_key(key: SSHKey) -> None:
+    if not key:
+        return
+    try:
+        cert = key.certificate
+    except SSHCertificate.DoesNotExist:
+        return
+    # Mark the cert as revoked but keep the record for audit/history.
+    cert.revoke()
+    cert.save(update_fields=["is_active", "revoked_at"])
+
+
+def _sign_public_key(
+    ca_private_key: str,
+    ca_public_key: str,
+    public_key: str,
+    identity: str,
+    principal: str,
+    serial: int,
+    validity_days: int,
+    comment: str,
+    validity_override: str | None = None,
+) -> str:
+    if not ca_private_key or not ca_public_key:
+        raise RuntimeError("CA material missing")
+    # Write key material into a temp dir to avoid persisting secrets.
+    with tempfile.TemporaryDirectory() as tmpdir:
+        ca_path = os.path.join(tmpdir, "user_ca")
+        pubkey_path = os.path.join(tmpdir, "user.pub")
+        _write_file(ca_path, ca_private_key, 0o600)
+        _write_file(ca_path + ".pub", ca_public_key.strip() + "\n", 0o644)
+        pubkey_with_comment = _ensure_comment(public_key, comment)
+        _write_file(pubkey_path, pubkey_with_comment + "\n", 0o644)
+        # Use ssh-keygen to sign the public key with the CA.
+        cmd = [
+            "ssh-keygen",
+            "-s",
+            ca_path,
+            "-I",
+            identity,
+            "-n",
+            principal,
+            "-V",
+            validity_override or f"+{validity_days}d",
+            "-z",
+            str(serial),
+            pubkey_path,
+        ]
+        try:
+            result = subprocess.run(cmd, check=True, capture_output=True)
+        except FileNotFoundError as exc:
+            raise RuntimeError("ssh-keygen not available") from exc
+        except subprocess.CalledProcessError as exc:
+            raise RuntimeError(f"ssh-keygen failed: {exc.stderr.decode('utf-8', 'ignore')}") from exc
+        # ssh-keygen writes the cert alongside the input pubkey.
+        cert_path = pubkey_path
+        if cert_path.endswith(".pub"):
+            cert_path = cert_path[: -len(".pub")]
+        cert_path += "-cert.pub"
+        if not os.path.exists(cert_path):
+            stderr = result.stderr.decode("utf-8", "ignore")
+            raise RuntimeError(f"ssh-keygen output missing: {cert_path} {stderr}")
+        with open(cert_path, "r", encoding="utf-8") as handle:
+            return handle.read().strip()
+
+
+def _ensure_comment(public_key: str, comment: str) -> str:
+    # Preserve the key type and base64 payload; replace/append only the comment.
+    parts = (public_key or "").strip().split()
+    if len(parts) < 2:
+        return public_key.strip()
+    key_type, key_b64 = parts[0], parts[1]
+    if not comment:
+        return f"{key_type} {key_b64}"
+    return f"{key_type} {key_b64} {comment}"
+
+
+def _sanitize_label(value: str) -> str:
+    # Reduce label to a safe, lowercase token for certificate identity.
+    cleaned = re.sub(r"[^a-zA-Z0-9_-]+", "-", (value or "").strip())
+    cleaned = cleaned.strip("-_")
+    if cleaned:
+        return cleaned.lower()
+    return "key"
+
+
+def _write_file(path: str, data: str, mode: int) -> None:
+    with open(path, "w", encoding="utf-8") as handle:
+        handle.write(data)
+    # Apply explicit permissions for key material.
+    os.chmod(path, mode)

app/apps/keys/migrations/0001_initial.py

@@ -0,0 +1,53 @@
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="SSHKey",
+            fields=[
+                ("id", models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name="ID")),
+                ("name", models.CharField(max_length=128)),
+                ("public_key", models.TextField()),
+                ("key_type", models.CharField(max_length=32)),
+                ("fingerprint", models.CharField(db_index=True, max_length=128)),
+                ("is_active", models.BooleanField(db_index=True, default=True)),
+                ("created_at", models.DateTimeField(default=django.utils.timezone.now, editable=False)),
+                ("revoked_at", models.DateTimeField(blank=True, null=True)),
+                ("last_used_at", models.DateTimeField(blank=True, null=True)),
+                (
+                    "user",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="ssh_keys",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+            ],
+            options={
+                "verbose_name": "SSH key",
+                "verbose_name_plural": "SSH keys",
+                "ordering": ["-created_at"],
+                "indexes": [
+                    models.Index(fields=["user", "is_active"], name="keys_user_active_idx"),
+                    models.Index(fields=["fingerprint"], name="keys_fingerprint_idx"),
+                ],
+                "constraints": [
+                    models.UniqueConstraint(
+                        fields=("user", "fingerprint"),
+                        name="unique_user_key_fingerprint",
+                    )
+                ],
+            },
+        ),
+    ]

app/apps/keys/migrations/0002_ssh_certificates.py

@@ -0,0 +1,86 @@
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("keys", "0001_initial"),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="SSHCertificateAuthority",
+            fields=[
+                ("id", models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name="ID")),
+                ("name", models.CharField(default="Keywarden User SSH CA", max_length=128)),
+                ("public_key", models.TextField(blank=True)),
+                ("private_key", models.TextField(blank=True)),
+                ("fingerprint", models.CharField(blank=True, max_length=128)),
+                ("created_at", models.DateTimeField(default=django.utils.timezone.now, editable=False)),
+                ("revoked_at", models.DateTimeField(blank=True, null=True)),
+                ("is_active", models.BooleanField(db_index=True, default=True)),
+                (
+                    "created_by",
+                    models.ForeignKey(
+                        blank=True,
+                        null=True,
+                        on_delete=django.db.models.deletion.SET_NULL,
+                        related_name="ssh_certificate_authorities",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+            ],
+            options={
+                "verbose_name": "SSH certificate authority",
+                "verbose_name_plural": "SSH certificate authorities",
+                "ordering": ["-created_at"],
+            },
+        ),
+        migrations.CreateModel(
+            name="SSHCertificate",
+            fields=[
+                ("id", models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name="ID")),
+                ("certificate", models.TextField()),
+                ("serial", models.BigIntegerField()),
+                ("principals", models.JSONField(blank=True, default=list)),
+                ("valid_after", models.DateTimeField()),
+                ("valid_before", models.DateTimeField()),
+                ("created_at", models.DateTimeField(default=django.utils.timezone.now, editable=False)),
+                ("revoked_at", models.DateTimeField(blank=True, null=True)),
+                ("is_active", models.BooleanField(db_index=True, default=True)),
+                (
+                    "key",
+                    models.OneToOneField(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="certificate",
+                        to="keys.sshkey",
+                    ),
+                ),
+                (
+                    "user",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="ssh_certificates",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+            ],
+            options={
+                "verbose_name": "SSH certificate",
+                "verbose_name_plural": "SSH certificates",
+                "ordering": ["-created_at"],
+            },
+        ),
+        migrations.AddIndex(
+            model_name="sshcertificate",
+            index=models.Index(fields=["user", "is_active"], name="keys_cert_user_active_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="sshcertificate",
+            index=models.Index(fields=["valid_before"], name="keys_cert_valid_before_idx"),
+        ),
+    ]

app/apps/keys/models.py

@@ -0,0 +1,170 @@
+from __future__ import annotations
+
+import base64
+import binascii
+import hashlib
+import os
+import subprocess
+import tempfile
+
+from django.conf import settings
+from django.core.exceptions import ValidationError
+from django.db import models
+from django.utils import timezone
+
+
+def parse_public_key(public_key: str) -> tuple[str, str, str]:
+    trimmed = (public_key or "").strip()
+    parts = trimmed.split()
+    if len(parts) < 2:
+        raise ValidationError("Invalid SSH public key format.")
+    key_type, key_b64 = parts[0], parts[1]
+    try:
+        key_bytes = base64.b64decode(key_b64.encode("ascii"), validate=True)
+    except (binascii.Error, ValueError) as exc:
+        raise ValidationError("Invalid SSH public key format.") from exc
+    digest = hashlib.sha256(key_bytes).digest()
+    fingerprint = "SHA256:" + base64.b64encode(digest).decode("ascii").rstrip("=")
+    return key_type, key_b64, fingerprint
+
+
+class SSHKey(models.Model):
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="ssh_keys"
+    )
+    name = models.CharField(max_length=128)
+    public_key = models.TextField()
+    key_type = models.CharField(max_length=32)
+    fingerprint = models.CharField(max_length=128, db_index=True)
+    is_active = models.BooleanField(default=True, db_index=True)
+    created_at = models.DateTimeField(default=timezone.now, editable=False)
+    revoked_at = models.DateTimeField(null=True, blank=True)
+    last_used_at = models.DateTimeField(null=True, blank=True)
+
+    class Meta:
+        verbose_name = "SSH key"
+        verbose_name_plural = "SSH keys"
+        indexes = [
+            models.Index(fields=["user", "is_active"], name="keys_user_active_idx"),
+            models.Index(fields=["fingerprint"], name="keys_fingerprint_idx"),
+        ]
+        constraints = [
+            models.UniqueConstraint(
+                fields=["user", "fingerprint"], name="unique_user_key_fingerprint"
+            )
+        ]
+        ordering = ["-created_at"]
+
+    def set_public_key(self, public_key: str) -> None:
+        key_type, key_b64, fingerprint = parse_public_key(public_key)
+        self.key_type = key_type
+        self.fingerprint = fingerprint
+        self.public_key = f"{key_type} {key_b64}"
+
+    def revoke(self) -> None:
+        self.is_active = False
+        self.revoked_at = timezone.now()
+        try:
+            cert = self.certificate
+        except SSHCertificate.DoesNotExist:
+            return
+        cert.revoke()
+        cert.save(update_fields=["is_active", "revoked_at"])
+
+    def __str__(self) -> str:
+        return f"{self.name} ({self.user_id})"
+
+
+class SSHCertificateAuthority(models.Model):
+    name = models.CharField(max_length=128, default="Keywarden User SSH CA")
+    public_key = models.TextField(blank=True)
+    private_key = models.TextField(blank=True)
+    fingerprint = models.CharField(max_length=128, blank=True)
+    created_at = models.DateTimeField(default=timezone.now, editable=False)
+    revoked_at = models.DateTimeField(null=True, blank=True)
+    is_active = models.BooleanField(default=True, db_index=True)
+    created_by = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        null=True,
+        blank=True,
+        on_delete=models.SET_NULL,
+        related_name="ssh_certificate_authorities",
+    )
+
+    class Meta:
+        verbose_name = "SSH certificate authority"
+        verbose_name_plural = "SSH certificate authorities"
+        ordering = ["-created_at"]
+
+    def __str__(self) -> str:
+        status = "active" if self.is_active and not self.revoked_at else "revoked"
+        return f"{self.name} ({status})"
+
+    def revoke(self) -> None:
+        self.is_active = False
+        self.revoked_at = timezone.now()
+
+    def ensure_material(self) -> None:
+        if self.public_key and self.private_key:
+            if not self.fingerprint:
+                _, _, fingerprint = parse_public_key(self.public_key)
+                self.fingerprint = fingerprint
+            return
+        with tempfile.TemporaryDirectory() as tmpdir:
+            key_path = os.path.join(tmpdir, "keywarden_user_ca")
+            cmd = [
+                "ssh-keygen",
+                "-t",
+                "ed25519",
+                "-f",
+                key_path,
+                "-C",
+                self.name,
+                "-N",
+                "",
+            ]
+            try:
+                subprocess.run(cmd, check=True, capture_output=True)
+            except FileNotFoundError as exc:
+                raise RuntimeError("ssh-keygen not available") from exc
+            except subprocess.CalledProcessError as exc:
+                raise RuntimeError(f"ssh-keygen failed: {exc.stderr.decode('utf-8', 'ignore')}") from exc
+            with open(key_path, "r", encoding="utf-8") as handle:
+                self.private_key = handle.read()
+            with open(key_path + ".pub", "r", encoding="utf-8") as handle:
+                self.public_key = handle.read().strip()
+        _, _, fingerprint = parse_public_key(self.public_key)
+        self.fingerprint = fingerprint
+
+
+class SSHCertificate(models.Model):
+    key = models.OneToOneField(
+        SSHKey, on_delete=models.CASCADE, related_name="certificate"
+    )
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="ssh_certificates"
+    )
+    certificate = models.TextField()
+    serial = models.BigIntegerField()
+    principals = models.JSONField(default=list, blank=True)
+    valid_after = models.DateTimeField()
+    valid_before = models.DateTimeField()
+    created_at = models.DateTimeField(default=timezone.now, editable=False)
+    revoked_at = models.DateTimeField(null=True, blank=True)
+    is_active = models.BooleanField(default=True, db_index=True)
+
+    class Meta:
+        verbose_name = "SSH certificate"
+        verbose_name_plural = "SSH certificates"
+        indexes = [
+            models.Index(fields=["user", "is_active"], name="keys_cert_user_active_idx"),
+            models.Index(fields=["valid_before"], name="keys_cert_valid_before_idx"),
+        ]
+        ordering = ["-created_at"]
+
+    def revoke(self) -> None:
+        self.is_active = False
+        self.revoked_at = timezone.now()
+
+    def __str__(self) -> str:
+        return f"{self.user_id} ({self.serial})"

app/apps/keys/signals.py

@@ -0,0 +1,19 @@
+from __future__ import annotations
+
+from django.db.models.signals import post_save
+from django.dispatch import receiver
+from guardian.shortcuts import assign_perm
+
+from apps.core.rbac import assign_default_object_permissions
+from .models import SSHKey
+
+
+@receiver(post_save, sender=SSHKey)
+def assign_ssh_key_perms(sender, instance: SSHKey, created: bool, **kwargs) -> None:
+    if not created:
+        return
+    if instance.user_id:
+        user = instance.user
+        for perm in ("keys.view_sshkey", "keys.change_sshkey", "keys.delete_sshkey"):
+            assign_perm(perm, user, instance)
+    assign_default_object_permissions(instance)

app/apps/keys/utils.py

@@ -0,0 +1,33 @@
+from __future__ import annotations
+
+import re
+
+from django.conf import settings
+
+MAX_USERNAME_LEN = 32
+_SANITIZE_RE = re.compile(r"[^a-z0-9_-]")
+
+
+def render_system_username(username: str, user_id: int) -> str:
+    # Render from template and then sanitize to an OS-safe username.
+    template = settings.KEYWARDEN_ACCOUNT_USERNAME_TEMPLATE
+    raw = template.replace("{{username}}", username or "")
+    raw = raw.replace("{{user_id}}", str(user_id))
+    cleaned = sanitize_username(raw)
+    if len(cleaned) > MAX_USERNAME_LEN:
+        cleaned = cleaned[:MAX_USERNAME_LEN]
+    if cleaned:
+        return cleaned
+    # Fall back to a deterministic, non-empty username.
+    return f"kw_{user_id}"
+
+
+def sanitize_username(raw: str) -> str:
+    # Normalize to lowercase and replace disallowed characters.
+    raw = (raw or "").lower()
+    raw = _SANITIZE_RE.sub("_", raw)
+    raw = raw.strip("-_")
+    if raw.startswith("-"):
+        # Avoid leading dash, which can be interpreted as a CLI flag.
+        return "kw" + raw
+    return raw

app/apps/servers/admin.py

@@ -1,16 +1,34 @@
 from django.contrib import admin
 from django.utils.html import format_html
-from .models import Server
+try:
+    from unfold.contrib.guardian.admin import GuardedModelAdmin
+except ImportError:  # Fallback for older Unfold builds without guardian admin shim.
+    from guardian.admin import GuardedModelAdmin as GuardianGuardedModelAdmin
+    from unfold.admin import ModelAdmin as UnfoldModelAdmin
+
+    class GuardedModelAdmin(GuardianGuardedModelAdmin, UnfoldModelAdmin):
+        pass
+
+from .models import AgentCertificateAuthority, EnrollmentToken, Server
 
 
 @admin.register(Server)
-class ServerAdmin(admin.ModelAdmin):
-    list_display = ("avatar", "display_name", "hostname", "ipv4", "ipv6", "created_at")
+class ServerAdmin(GuardedModelAdmin):
+    list_display = ("avatar", "display_name", "hostname", "ipv4", "ipv6", "agent_enrolled_at", "created_at")
     list_display_links = ("display_name",)
     search_fields = ("display_name", "hostname", "ipv4", "ipv6")
     list_filter = ("created_at",)
-    readonly_fields = ("created_at", "updated_at")
-    fields = ("display_name", "hostname", "ipv4", "ipv6", "image", "created_at", "updated_at")
+    readonly_fields = ("created_at", "updated_at", "agent_enrolled_at")
+    fields = (
+        "display_name",
+        "hostname",
+        "ipv4",
+        "ipv6",
+        "image",
+        "agent_enrolled_at",
+        "created_at",
+        "updated_at",
+    )
 
     def avatar(self, obj: Server):
         if obj.image_url:
@@ -27,3 +45,50 @@ class ServerAdmin(admin.ModelAdmin):
     avatar.short_description = ""
 
 
+@admin.register(EnrollmentToken)
+class EnrollmentTokenAdmin(admin.ModelAdmin):
+    list_display = ("token", "created_at", "expires_at", "used_at", "server")
+    list_filter = ("created_at", "used_at")
+    search_fields = ("token", "server__display_name", "server__hostname")
+    readonly_fields = ("token", "created_at", "used_at", "server", "created_by")
+    fields = ("token", "expires_at", "created_by", "created_at", "used_at", "server")
+
+    def save_model(self, request, obj, form, change) -> None:
+        if not obj.pk:
+            obj.ensure_token()
+            if request.user and request.user.is_authenticated and not obj.created_by_id:
+                obj.created_by = request.user
+        super().save_model(request, obj, form, change)
+
+
+@admin.register(AgentCertificateAuthority)
+class AgentCertificateAuthorityAdmin(admin.ModelAdmin):
+    list_display = ("name", "is_active", "created_at", "revoked_at")
+    list_filter = ("is_active", "created_at", "revoked_at")
+    search_fields = ("name", "fingerprint")
+    readonly_fields = ("cert_pem", "fingerprint", "serial", "created_at", "revoked_at", "created_by")
+    fields = (
+        "name",
+        "is_active",
+        "cert_pem",
+        "fingerprint",
+        "serial",
+        "created_by",
+        "created_at",
+        "revoked_at",
+    )
+    actions = ["revoke_selected"]
+
+    def save_model(self, request, obj, form, change) -> None:
+        if request.user and request.user.is_authenticated and not obj.created_by_id:
+            obj.created_by = request.user
+        obj.ensure_material()
+        if obj.is_active:
+            AgentCertificateAuthority.objects.exclude(pk=obj.pk).update(is_active=False)
+        super().save_model(request, obj, form, change)
+
+    @admin.action(description="Revoke selected CAs")
+    def revoke_selected(self, request, queryset):
+        for ca in queryset:
+            ca.revoke()
+            ca.save(update_fields=["is_active", "revoked_at"])

app/apps/servers/apps.py

@@ -6,4 +6,7 @@ class ServersConfig(AppConfig):
     name = "apps.servers"
     verbose_name = "Servers"
 
+    def ready(self) -> None:
+        from . import signals  # noqa: F401
+        return super().ready()
 

app/apps/servers/consumers.py

@@ -0,0 +1,295 @@
+from __future__ import annotations
+
+import asyncio
+import os
+import secrets
+import subprocess
+import tempfile
+
+from channels.db import database_sync_to_async
+from channels.generic.websocket import AsyncWebsocketConsumer
+from django.conf import settings
+from django.utils import timezone
+
+from apps.audit.matching import find_matching_event_type
+from apps.audit.models import AuditEventType, AuditLog
+from apps.audit.utils import (
+    get_client_ip_from_scope,
+    get_request_id_from_scope,
+    get_user_agent_from_scope,
+)
+from apps.keys.certificates import get_active_ca, _sign_public_key
+from apps.keys.utils import render_system_username
+from apps.servers.models import Server, ServerAccount
+from apps.servers.permissions import user_can_shell
+
+
+class ShellConsumer(AsyncWebsocketConsumer):
+    async def connect(self):
+        # Initialize per-connection state; this consumer is stateful
+        # across the WebSocket lifecycle.
+        self.proc = None
+        self.reader_task = None
+        self.tempdir = None
+        self.system_username = ""
+        self.shell_target = ""
+        self.server_id: int | None = None
+
+        # Reject unauthenticated connections before any side effects.
+        user = self.scope.get("user")
+        if not user or not getattr(user, "is_authenticated", False):
+            await self.close(code=4401)
+            return
+        server_id = self.scope.get("url_route", {}).get("kwargs", {}).get("server_id")
+        if not server_id:
+            await self.close(code=4400)
+            return
+        # Resolve the server and enforce object-level permissions before
+        # accepting the socket.
+        server = await self._get_server(user, int(server_id))
+        if not server:
+            await self.close(code=4404)
+            return
+        self.server_id = server.id
+        can_shell = await self._can_shell(user, server)
+        if not can_shell:
+            await self.close(code=4403)
+            return
+        # Resolve the per-user system account name and the best reachable host.
+        system_username = await self._get_system_username(user, server)
+        shell_target = server.hostname or server.ipv4 or server.ipv6
+        if not system_username or not shell_target:
+            await self.close(code=4400)
+            return
+        self.system_username = system_username
+        self.shell_target = shell_target
+
+        # Only accept the socket after all authn/authz checks have passed.
+        await self.accept()
+        # Audit the WebSocket connection as an explicit, opt-in event.
+        await self._audit_websocket_event(user=user, action="connect", metadata={"server_id": server.id})
+        await self.send(text_data="Connecting...\r\n")
+        try:
+            await self._start_ssh(user)
+        except Exception:
+            await self.send(text_data="Connection failed.\r\n")
+            await self.close()
+
+    async def disconnect(self, code):
+        user = self.scope.get("user")
+        if user and getattr(user, "is_authenticated", False):
+            await self._audit_websocket_event(
+                user=user,
+                action="disconnect",
+                metadata={"code": code, "server_id": self.server_id},
+            )
+        if self.reader_task:
+            self.reader_task.cancel()
+            self.reader_task = None
+        if self.proc and self.proc.returncode is None:
+            self.proc.terminate()
+            try:
+                await asyncio.wait_for(self.proc.wait(), timeout=2.0)
+            except asyncio.TimeoutError:
+                self.proc.kill()
+        if self.tempdir:
+            self.tempdir.cleanup()
+            self.tempdir = None
+
+    async def receive(self, text_data=None, bytes_data=None):
+        if not self.proc or not self.proc.stdin:
+            return
+        # Forward WebSocket payloads directly to the SSH subprocess stdin.
+        if bytes_data is not None:
+            data = bytes_data
+        elif text_data is not None:
+            data = text_data.encode("utf-8")
+        else:
+            return
+        if data:
+            self.proc.stdin.write(data)
+            await self.proc.stdin.drain()
+
+    async def _start_ssh(self, user):
+        # Generate a short-lived keypair + SSH certificate and then
+        # bridge the WebSocket to an SSH subprocess.
+        # Prefer tmpfs when available so the private key never hits disk.
+        temp_base = "/dev/shm" if os.path.isdir("/dev/shm") and os.access("/dev/shm", os.W_OK) else None
+        self.tempdir = tempfile.TemporaryDirectory(prefix="keywarden-shell-", dir=temp_base)
+        key_path, cert_path = await asyncio.to_thread(
+            _generate_session_keypair,
+            self.tempdir.name,
+            user,
+            self.system_username,
+        )
+        ssh_host = _format_ssh_host(self.shell_target)
+        # Use a locked-down, non-interactive SSH invocation suitable for websockets.
+        command = [
+            "ssh",
+            "-tt",
+            "-i",
+            key_path,
+            "-o",
+            f"CertificateFile={cert_path}",
+            "-o",
+            "BatchMode=yes",
+            "-o",
+            "PasswordAuthentication=no",
+            "-o",
+            "KbdInteractiveAuthentication=no",
+            "-o",
+            "ChallengeResponseAuthentication=no",
+            "-o",
+            "PreferredAuthentications=publickey",
+            "-o",
+            "UserKnownHostsFile=/dev/null",
+            "-o",
+            "GlobalKnownHostsFile=/dev/null",
+            "-o",
+            "StrictHostKeyChecking=no",
+            "-o",
+            "VerifyHostKeyDNS=no",
+            "-o",
+            "LogLevel=ERROR",
+            f"{self.system_username}@{ssh_host}",
+            "/bin/bash",
+        ]
+        self.proc = await asyncio.create_subprocess_exec(
+            *command,
+            stdin=asyncio.subprocess.PIPE,
+            stdout=asyncio.subprocess.PIPE,
+            stderr=asyncio.subprocess.STDOUT,
+        )
+        # Delete key material immediately after the SSH process has it open.
+        for path in (key_path, cert_path, f"{key_path}.pub"):
+            try:
+                os.remove(path)
+            except FileNotFoundError:
+                continue
+            except Exception:
+                pass
+        self.reader_task = asyncio.create_task(self._stream_output())
+
+    async def _stream_output(self):
+        if not self.proc or not self.proc.stdout:
+            return
+        # Pump subprocess output until EOF, then close the socket.
+        while True:
+            chunk = await self.proc.stdout.read(4096)
+            if not chunk:
+                break
+            await self.send(bytes_data=chunk)
+        await self.close()
+
+    @database_sync_to_async
+    def _get_server(self, user, server_id: int):
+        try:
+            server = Server.objects.get(id=server_id)
+        except Server.DoesNotExist:
+            return None
+        if not user.has_perm("servers.view_server", server):
+            return None
+        return server
+
+    @database_sync_to_async
+    def _can_shell(self, user, server) -> bool:
+        return user_can_shell(user, server, timezone.now())
+
+    @database_sync_to_async
+    def _get_system_username(self, user, server) -> str:
+        account = ServerAccount.objects.filter(server=server, user=user).first()
+        if account:
+            return account.system_username
+        return render_system_username(user.username, user.id)
+
+    @database_sync_to_async
+    def _audit_websocket_event(self, user, action: str, metadata: dict | None = None) -> None:
+        try:
+            path = str(self.scope.get("path") or "")
+            client_ip = get_client_ip_from_scope(self.scope)
+            # Match only against explicitly configured WebSocket event types.
+            event_type = find_matching_event_type(
+                kind=AuditEventType.Kind.WEBSOCKET,
+                method="GET",
+                route=path,
+                path=path,
+                ip=client_ip,
+            )
+            if event_type is None:
+                return
+            combined_metadata = {
+                "action": action,
+                "path": path,
+            }
+            if metadata:
+                combined_metadata.update(metadata)
+            AuditLog.objects.create(
+                created_at=timezone.now(),
+                actor=user,
+                event_type=event_type,
+                message=f"WebSocket {action} {path}",
+                severity=event_type.default_severity,
+                source=AuditLog.Source.API,
+                ip_address=client_ip,
+                user_agent=get_user_agent_from_scope(self.scope),
+                request_id=get_request_id_from_scope(self.scope),
+                metadata=combined_metadata,
+            )
+        except Exception:
+            # Auditing is best-effort; never fail the shell session.
+            return
+
+
+def _generate_session_keypair(tempdir: str, user, principal: str) -> tuple[str, str]:
+    # Create an ephemeral SSH keypair and sign it with the active CA so
+    # the user gets time-scoped shell access without long-lived keys.
+    ca = get_active_ca(created_by=user)
+    serial = secrets.randbits(63)
+    identity = f"keywarden-shell-{user.id}-{serial}"
+    key_path = os.path.join(tempdir, "session_key")
+    cmd = [
+        "ssh-keygen",
+        "-t",
+        "ed25519",
+        "-f",
+        key_path,
+        "-C",
+        identity,
+        "-N",
+        "",
+    ]
+    try:
+        subprocess.run(cmd, check=True, capture_output=True)
+    except FileNotFoundError as exc:
+        raise RuntimeError("ssh-keygen not available") from exc
+    except subprocess.CalledProcessError as exc:
+        raise RuntimeError(f"ssh-keygen failed: {exc.stderr.decode('utf-8', 'ignore')}") from exc
+    # Restrict filesystem access to the private key.
+    os.chmod(key_path, 0o600)
+    pubkey_path = key_path + ".pub"
+    with open(pubkey_path, "r", encoding="utf-8") as handle:
+        public_key = handle.read().strip()
+    cert_text = _sign_public_key(
+        ca_private_key=ca.private_key,
+        ca_public_key=ca.public_key,
+        public_key=public_key,
+        identity=identity,
+        principal=principal,
+        serial=serial,
+        validity_days=1,
+        validity_override=f"+{settings.KEYWARDEN_SHELL_CERT_VALIDITY_MINUTES}m",
+        comment=identity,
+    )
+    cert_path = key_path + "-cert.pub"
+    with open(cert_path, "w", encoding="utf-8") as handle:
+        handle.write(cert_text + "\n")
+    # Public cert is safe to be world-readable.
+    os.chmod(cert_path, 0o644)
+    return key_path, cert_path
+
+
+def _format_ssh_host(host: str) -> str:
+    # IPv6 hosts must be wrapped in brackets for the SSH CLI.
+    if ":" in host and not (host.startswith("[") and host.endswith("]")):
+        return f"[{host}]"
+    return host

app/apps/servers/migrations/0002_agent_enrollment.py

@@ -0,0 +1,73 @@
+from django.conf import settings
+from django.db import migrations, models
+import django.utils.timezone
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("servers", "0001_initial"),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="server",
+            name="agent_cert_fingerprint",
+            field=models.CharField(blank=True, max_length=128, null=True),
+        ),
+        migrations.AddField(
+            model_name="server",
+            name="agent_cert_serial",
+            field=models.CharField(blank=True, max_length=64, null=True),
+        ),
+        migrations.AddField(
+            model_name="server",
+            name="agent_enrolled_at",
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+        migrations.CreateModel(
+            name="EnrollmentToken",
+            fields=[
+                ("id", models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name="ID")),
+                ("token", models.CharField(max_length=128, unique=True)),
+                ("created_at", models.DateTimeField(default=django.utils.timezone.now, editable=False)),
+                ("expires_at", models.DateTimeField(blank=True, null=True)),
+                ("used_at", models.DateTimeField(blank=True, null=True)),
+                (
+                    "created_by",
+                    models.ForeignKey(
+                        blank=True,
+                        null=True,
+                        on_delete=django.db.models.deletion.SET_NULL,
+                        related_name="server_enrollment_tokens",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+                (
+                    "server",
+                    models.ForeignKey(
+                        blank=True,
+                        null=True,
+                        on_delete=django.db.models.deletion.SET_NULL,
+                        related_name="enrollment_tokens",
+                        to="servers.server",
+                    ),
+                ),
+            ],
+            options={
+                "verbose_name": "Enrollment token",
+                "verbose_name_plural": "Enrollment tokens",
+                "ordering": ["-created_at"],
+            },
+        ),
+        migrations.AddIndex(
+            model_name="enrollmenttoken",
+            index=models.Index(fields=["created_at"], name="servers_enroll_created_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="enrollmenttoken",
+            index=models.Index(fields=["used_at"], name="servers_enroll_used_idx"),
+        ),
+    ]

app/apps/servers/migrations/0003_agent_ca.py

@@ -0,0 +1,44 @@
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("servers", "0002_agent_enrollment"),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="AgentCertificateAuthority",
+            fields=[
+                ("id", models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name="ID")),
+                ("name", models.CharField(default="Keywarden Agent CA", max_length=128)),
+                ("cert_pem", models.TextField()),
+                ("key_pem", models.TextField()),
+                ("fingerprint", models.CharField(blank=True, max_length=128)),
+                ("serial", models.CharField(blank=True, max_length=64)),
+                ("created_at", models.DateTimeField(default=django.utils.timezone.now, editable=False)),
+                ("revoked_at", models.DateTimeField(blank=True, null=True)),
+                ("is_active", models.BooleanField(db_index=True, default=True)),
+                (
+                    "created_by",
+                    models.ForeignKey(
+                        blank=True,
+                        null=True,
+                        on_delete=django.db.models.deletion.SET_NULL,
+                        related_name="agent_certificate_authorities",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+            ],
+            options={
+                "verbose_name": "Agent certificate authority",
+                "verbose_name_plural": "Agent certificate authorities",
+                "ordering": ["-created_at"],
+            },
+        ),
+    ]

app/apps/servers/migrations/0004_server_account.py

@@ -0,0 +1,59 @@
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("servers", "0003_agent_ca"),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="ServerAccount",
+            fields=[
+                ("id", models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name="ID")),
+                ("system_username", models.CharField(max_length=128)),
+                ("is_present", models.BooleanField(db_index=True, default=False)),
+                ("last_synced_at", models.DateTimeField(default=django.utils.timezone.now, editable=False)),
+                ("created_at", models.DateTimeField(default=django.utils.timezone.now, editable=False)),
+                ("updated_at", models.DateTimeField(auto_now=True)),
+                (
+                    "server",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="accounts",
+                        to="servers.server",
+                    ),
+                ),
+                (
+                    "user",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="server_accounts",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+            ],
+            options={
+                "verbose_name": "Server account",
+                "verbose_name_plural": "Server accounts",
+                "ordering": ["server_id", "user_id"],
+            },
+        ),
+        migrations.AddConstraint(
+            model_name="serveraccount",
+            constraint=models.UniqueConstraint(fields=("server", "user"), name="unique_server_account"),
+        ),
+        migrations.AddIndex(
+            model_name="serveraccount",
+            index=models.Index(fields=["server", "user"], name="servers_account_user_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="serveraccount",
+            index=models.Index(fields=["server", "is_present"], name="servers_account_present_idx"),
+        ),
+    ]

app/apps/servers/migrations/0005_server_shell_permission.py

@@ -0,0 +1,19 @@
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("servers", "0004_server_account"),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name="server",
+            options={
+                "ordering": ["display_name", "hostname", "ipv4", "ipv6"],
+                "permissions": [("shell_server", "Can access server shell")],
+                "verbose_name": "Server",
+                "verbose_name_plural": "Servers",
+            },
+        ),
+    ]

app/apps/servers/migrations/0006_remove_user_group_server_perms.py

@@ -0,0 +1,35 @@
+from django.db import migrations
+
+
+def remove_user_group_server_perms(apps, schema_editor):
+    Group = apps.get_model("auth", "Group")
+    Permission = apps.get_model("auth", "Permission")
+    ContentType = apps.get_model("contenttypes", "ContentType")
+    GroupObjectPermission = apps.get_model("guardian", "GroupObjectPermission")
+
+    try:
+        group = Group.objects.get(name="user")
+    except Group.DoesNotExist:
+        return
+
+    try:
+        content_type = ContentType.objects.get(app_label="servers", model="server")
+    except ContentType.DoesNotExist:
+        return
+
+    perm_ids = Permission.objects.filter(content_type=content_type).values_list("id", flat=True)
+    GroupObjectPermission.objects.filter(
+        group_id=group.id,
+        permission_id__in=list(perm_ids),
+    ).delete()
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("servers", "0005_server_shell_permission"),
+        ("guardian", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.RunPython(remove_user_group_server_perms, migrations.RunPython.noop),
+    ]

app/apps/servers/migrations/0007_server_host_key.py

@@ -0,0 +1,20 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("servers", "0006_remove_user_group_server_perms"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="server",
+            name="ssh_host_public_key",
+            field=models.TextField(blank=True),
+        ),
+        migrations.AddField(
+            model_name="server",
+            name="ssh_host_fingerprint",
+            field=models.CharField(blank=True, max_length=128),
+        ),
+    ]

app/apps/servers/migrations/0008_remove_server_host_key.py

@@ -0,0 +1,18 @@
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("servers", "0007_server_host_key"),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name="server",
+            name="ssh_host_fingerprint",
+        ),
+        migrations.RemoveField(
+            model_name="server",
+            name="ssh_host_public_key",
+        ),
+    ]

app/apps/servers/migrations/0009_server_heartbeat_fields.py

@@ -0,0 +1,21 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("servers", "0008_remove_server_host_key"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="server",
+            name="last_heartbeat_at",
+            field=models.DateTimeField(blank=True, db_index=True, null=True),
+        ),
+        migrations.AddField(
+            model_name="server",
+            name="last_ping_ms",
+            field=models.PositiveIntegerField(blank=True, null=True),
+        ),
+    ]

app/apps/servers/models.py

@@ -1,8 +1,16 @@
 from __future__ import annotations
 
+import secrets
+from datetime import datetime, timedelta
+
+from cryptography import x509
+from cryptography.hazmat.primitives import hashes, serialization
+from cryptography.hazmat.primitives.asymmetric import rsa
+from cryptography.x509.oid import NameOID
+from django.conf import settings
 from django.core.validators import RegexValidator
 from django.db import models
-from django.utils.text import slugify
+from django.utils import timezone
 
 
 hostname_validator = RegexValidator(
@@ -17,6 +25,11 @@ class Server(models.Model):
     ipv4 = models.GenericIPAddressField(null=True, blank=True, protocol="IPv4", unique=True)
     ipv6 = models.GenericIPAddressField(null=True, blank=True, protocol="IPv6", unique=True)
     image = models.ImageField(upload_to="servers/", null=True, blank=True)
+    agent_enrolled_at = models.DateTimeField(null=True, blank=True)
+    agent_cert_fingerprint = models.CharField(max_length=128, null=True, blank=True)
+    agent_cert_serial = models.CharField(max_length=64, null=True, blank=True)
+    last_heartbeat_at = models.DateTimeField(null=True, blank=True, db_index=True)
+    last_ping_ms = models.PositiveIntegerField(null=True, blank=True)
     created_at = models.DateTimeField(auto_now_add=True)
     updated_at = models.DateTimeField(auto_now=True)
 
@@ -24,6 +37,9 @@ class Server(models.Model):
         ordering = ["display_name", "hostname", "ipv4", "ipv6"]
         verbose_name = "Server"
         verbose_name_plural = "Servers"
+        permissions = [
+            ("shell_server", "Can access server shell"),
+        ]
 
     def __str__(self) -> str:
         primary = self.hostname or self.ipv4 or self.ipv6 or "unassigned"
@@ -41,3 +57,135 @@ class Server(models.Model):
         return (self.display_name or "?").strip()[:1].upper() or "?"
 
 
+class EnrollmentToken(models.Model):
+    token = models.CharField(max_length=128, unique=True)
+    created_at = models.DateTimeField(default=timezone.now, editable=False)
+    expires_at = models.DateTimeField(null=True, blank=True)
+    created_by = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        null=True,
+        blank=True,
+        on_delete=models.SET_NULL,
+        related_name="server_enrollment_tokens",
+    )
+    used_at = models.DateTimeField(null=True, blank=True)
+    server = models.ForeignKey(
+        Server, null=True, blank=True, on_delete=models.SET_NULL, related_name="enrollment_tokens"
+    )
+
+    class Meta:
+        verbose_name = "Enrollment token"
+        verbose_name_plural = "Enrollment tokens"
+        indexes = [
+            models.Index(fields=["created_at"], name="servers_enroll_created_idx"),
+            models.Index(fields=["used_at"], name="servers_enroll_used_idx"),
+        ]
+        ordering = ["-created_at"]
+
+    def __str__(self) -> str:
+        return f"{self.token[:8]}... ({'used' if self.used_at else 'unused'})"
+
+    def ensure_token(self) -> None:
+        if not self.token:
+            self.token = secrets.token_urlsafe(32)
+
+    def is_valid(self) -> bool:
+        if self.used_at:
+            return False
+        if self.expires_at and self.expires_at <= timezone.now():
+            return False
+        return True
+
+    def mark_used(self, server: Server) -> None:
+        self.used_at = timezone.now()
+        self.server = server
+
+    def save(self, *args, **kwargs):
+        self.ensure_token()
+        super().save(*args, **kwargs)
+
+
+class AgentCertificateAuthority(models.Model):
+    name = models.CharField(max_length=128, default="Keywarden Agent CA")
+    cert_pem = models.TextField()
+    key_pem = models.TextField()
+    fingerprint = models.CharField(max_length=128, blank=True)
+    serial = models.CharField(max_length=64, blank=True)
+    created_at = models.DateTimeField(default=timezone.now, editable=False)
+    revoked_at = models.DateTimeField(null=True, blank=True)
+    is_active = models.BooleanField(default=True, db_index=True)
+    created_by = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        null=True,
+        blank=True,
+        on_delete=models.SET_NULL,
+        related_name="agent_certificate_authorities",
+    )
+
+    class Meta:
+        verbose_name = "Agent certificate authority"
+        verbose_name_plural = "Agent certificate authorities"
+        ordering = ["-created_at"]
+
+    def __str__(self) -> str:
+        status = "active" if self.is_active and not self.revoked_at else "revoked"
+        return f"{self.name} ({status})"
+
+    def revoke(self) -> None:
+        self.is_active = False
+        self.revoked_at = timezone.now()
+
+    def ensure_material(self) -> None:
+        if self.cert_pem and self.key_pem:
+            return
+        key = rsa.generate_private_key(public_exponent=65537, key_size=2048)
+        subject = x509.Name([x509.NameAttribute(NameOID.COMMON_NAME, self.name)])
+        now = datetime.utcnow()
+        cert = (
+            x509.CertificateBuilder()
+            .subject_name(subject)
+            .issuer_name(subject)
+            .public_key(key.public_key())
+            .serial_number(x509.random_serial_number())
+            .not_valid_before(now - timedelta(minutes=5))
+            .not_valid_after(now + timedelta(days=3650))
+            .add_extension(x509.BasicConstraints(ca=True, path_length=None), critical=True)
+            .sign(key, hashes.SHA256())
+        )
+        cert_pem = cert.public_bytes(serialization.Encoding.PEM).decode("utf-8")
+        key_pem = key.private_bytes(
+            encoding=serialization.Encoding.PEM,
+            format=serialization.PrivateFormat.TraditionalOpenSSL,
+            encryption_algorithm=serialization.NoEncryption(),
+        ).decode("utf-8")
+        self.cert_pem = cert_pem
+        self.key_pem = key_pem
+        self.fingerprint = cert.fingerprint(hashes.SHA256()).hex()
+        self.serial = format(cert.serial_number, "x")
+
+
+class ServerAccount(models.Model):
+    server = models.ForeignKey(Server, on_delete=models.CASCADE, related_name="accounts")
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="server_accounts"
+    )
+    system_username = models.CharField(max_length=128)
+    is_present = models.BooleanField(default=False, db_index=True)
+    last_synced_at = models.DateTimeField(default=timezone.now, editable=False)
+    created_at = models.DateTimeField(default=timezone.now, editable=False)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        verbose_name = "Server account"
+        verbose_name_plural = "Server accounts"
+        constraints = [
+            models.UniqueConstraint(fields=["server", "user"], name="unique_server_account")
+        ]
+        indexes = [
+            models.Index(fields=["server", "user"], name="servers_account_user_idx"),
+            models.Index(fields=["server", "is_present"], name="servers_account_present_idx"),
+        ]
+        ordering = ["server_id", "user_id"]
+
+    def __str__(self) -> str:
+        return f"{self.system_username} ({self.server_id})"

app/apps/servers/permissions.py

@@ -0,0 +1,23 @@
+from __future__ import annotations
+
+from django.db.models import Q
+from django.utils import timezone
+
+from apps.access.models import AccessRequest
+
+
+def user_can_shell(user, server, now=None) -> bool:
+    if user.has_perm("servers.shell_server", server):
+        return True
+    if now is None:
+        now = timezone.now()
+    return (
+        AccessRequest.objects.filter(
+            requester=user,
+            server=server,
+            status=AccessRequest.Status.APPROVED,
+            request_shell=True,
+        )
+        .filter(Q(expires_at__isnull=True) | Q(expires_at__gt=now))
+        .exists()
+    )

app/apps/servers/signals.py

@@ -0,0 +1,14 @@
+from __future__ import annotations
+
+from django.db.models.signals import post_save
+from django.dispatch import receiver
+
+from apps.core.rbac import assign_default_object_permissions
+from .models import Server
+
+
+@receiver(post_save, sender=Server)
+def assign_server_perms(sender, instance: Server, created: bool, **kwargs) -> None:
+    if not created:
+        return
+    assign_default_object_permissions(instance)

app/apps/servers/templates/servers/_header.html

@@ -0,0 +1,114 @@
+<div class="space-y-4">
+  <nav class="flex" aria-label="Breadcrumb">
+    <ol class="inline-flex items-center space-x-1 text-sm text-gray-500">
+      <li class="inline-flex items-center">
+        <a href="{% url 'servers:dashboard' %}" class="inline-flex items-center gap-1 font-medium text-gray-600 hover:text-blue-700">
+          <svg class="h-4 w-4" aria-hidden="true" fill="currentColor" viewBox="0 0 20 20">
+            <path d="M10 3.172 2 10v7a1 1 0 0 0 1 1h5v-5h4v5h5a1 1 0 0 0 1-1v-7l-8-6.828Z"></path>
+          </svg>
+          Servers
+        </a>
+      </li>
+      <li class="inline-flex items-center">
+        <svg class="h-4 w-4 text-gray-400" aria-hidden="true" fill="currentColor" viewBox="0 0 20 20">
+          <path d="M7.05 4.55a1 1 0 0 1 1.4-1.42l6 5.9a1 1 0 0 1 0 1.42l-6 5.9a1 1 0 1 1-1.4-1.42L12.5 10 7.05 4.55Z"></path>
+        </svg>
+        <span class="ml-1 font-medium text-gray-700">{{ server.display_name }}</span>
+      </li>
+    </ol>
+  </nav>
+
+  <div class="flex flex-col gap-4 rounded-2xl border border-gray-200 bg-white p-5 shadow-sm sm:flex-row sm:items-center sm:justify-between">
+    <div class="flex items-center gap-4">
+      <div class="flex h-12 w-12 items-center justify-center rounded-2xl bg-blue-700 text-lg font-semibold text-white shadow-sm">
+        {{ server.initial }}
+      </div>
+      <div>
+        <h1 class="text-2xl font-semibold tracking-tight text-gray-900">{{ server.display_name }}</h1>
+        <p class="text-sm text-gray-500">
+          {{ server.hostname|default:server.ipv4|default:server.ipv6|default:"Unassigned" }}
+        </p>
+      </div>
+    </div>
+    <div class="flex items-center gap-2">
+      <div class="relative">
+        <button
+          type="button"
+          data-tooltip-target="server-header-status-{{ server.id }}"
+          class="{% if server_status.is_active %}inline-flex items-center rounded-full bg-emerald-50 px-2.5 py-1 text-xs font-semibold text-emerald-700{% else %}inline-flex items-center rounded-full bg-rose-50 px-2.5 py-1 text-xs font-semibold text-rose-700{% endif %}"
+        >
+          {{ server_status.label }}: {{ server_status.detail }}
+        </button>
+        <div
+          id="server-header-status-{{ server.id }}"
+          role="tooltip"
+          class="invisible absolute z-10 inline-block w-64 rounded-lg border border-gray-200 bg-white p-3 text-xs text-gray-700 shadow-sm opacity-0 transition-opacity"
+        >
+          <div class="space-y-1">
+            <div class="flex items-center justify-between">
+              <span class="font-semibold text-gray-500">Status</span>
+              <span class="font-medium text-gray-900">{{ server_status.label }}: {{ server_status.detail }}</span>
+            </div>
+            <div class="flex items-center justify-between">
+              <span class="font-semibold text-gray-500">Ping</span>
+              <span class="font-medium text-gray-900">
+                {% if server_status.ping_ms is not None %}{{ server_status.ping_ms }}ms{% else %}—{% endif %}
+              </span>
+            </div>
+            <div class="flex items-center justify-between">
+              <span class="font-semibold text-gray-500">Hostname</span>
+              <span class="font-medium text-gray-900">{{ server.hostname|default:"—" }}</span>
+            </div>
+            <div class="flex items-center justify-between">
+              <span class="font-semibold text-gray-500">IPv4</span>
+              <span class="font-medium text-gray-900">{{ server.ipv4|default:"—" }}</span>
+            </div>
+            <div class="flex items-center justify-between">
+              <span class="font-semibold text-gray-500">IPv6</span>
+              <span class="font-medium text-gray-900">{{ server.ipv6|default:"—" }}</span>
+            </div>
+            <div class="flex items-center justify-between">
+              <span class="font-semibold text-gray-500">Last heartbeat</span>
+              <span class="font-medium text-gray-900">
+                {% if server_status.heartbeat_at %}{{ server_status.heartbeat_at|date:"M j, Y H:i:s" }}{% else %}—{% endif %}
+              </span>
+            </div>
+          </div>
+          <div class="tooltip-arrow" data-popper-arrow></div>
+        </div>
+      </div>
+      <a href="{% url 'servers:dashboard' %}" class="inline-flex items-center rounded-lg border border-gray-200 bg-white px-3 py-2 text-xs font-semibold text-gray-700 hover:bg-gray-50">
+        Back to servers
+      </a>
+    </div>
+  </div>
+</div>
+
+<nav class="mt-4 flex flex-wrap gap-2 border-b border-gray-200 pb-3 text-sm font-medium text-gray-500">
+  <a
+    href="{% url 'servers:detail' server.id %}"
+    class="{% if active_tab == 'details' %}rounded-full bg-blue-50 px-4 py-1.5 text-blue-700 ring-1 ring-blue-100{% else %}rounded-full bg-gray-100 px-4 py-1.5 text-gray-600 hover:bg-white hover:text-gray-900{% endif %}"
+  >
+    Details
+  </a>
+  <a
+    href="{% url 'servers:audit' server.id %}"
+    class="{% if active_tab == 'audit' %}rounded-full bg-blue-50 px-4 py-1.5 text-blue-700 ring-1 ring-blue-100{% else %}rounded-full bg-gray-100 px-4 py-1.5 text-gray-600 hover:bg-white hover:text-gray-900{% endif %}"
+  >
+    Audit
+  </a>
+  {% if can_shell %}
+    <a
+      href="{% url 'servers:shell' server.id %}"
+      class="{% if active_tab == 'shell' %}rounded-full bg-blue-50 px-4 py-1.5 text-blue-700 ring-1 ring-blue-100{% else %}rounded-full bg-gray-100 px-4 py-1.5 text-gray-600 hover:bg-white hover:text-gray-900{% endif %}"
+    >
+      Shell
+    </a>
+  {% endif %}
+  <a
+    href="{% url 'servers:settings' server.id %}"
+    class="{% if active_tab == 'settings' %}rounded-full bg-blue-50 px-4 py-1.5 text-blue-700 ring-1 ring-blue-100{% else %}rounded-full bg-gray-100 px-4 py-1.5 text-gray-600 hover:bg-white hover:text-gray-900{% endif %}"
+  >
+    Settings
+  </a>
+</nav>

app/apps/servers/templates/servers/audit.html

@@ -0,0 +1,46 @@
+{% extends "base.html" %}
+
+{% block title %}Audit • {{ server.display_name }} • Keywarden{% endblock %}
+
+{% block content %}
+  <div class="space-y-6">
+    {% include "servers/_header.html" %}
+
+    <section class="rounded-2xl border border-gray-200 bg-white p-6 shadow-sm">
+      <div class="flex flex-wrap items-start justify-between gap-4">
+        <div>
+          <h2 class="text-lg font-semibold text-gray-900">Audit logs</h2>
+          <p class="mt-1 text-sm text-gray-500">Track certificate issuance and access events.</p>
+        </div>
+        <span class="inline-flex items-center rounded-full bg-gray-100 px-2.5 py-1 text-xs font-semibold text-gray-700">Placeholder</span>
+      </div>
+      <div class="mt-5 rounded-xl border border-dashed border-gray-200 bg-gray-50 p-6 text-center">
+        <div class="mx-auto flex h-12 w-12 items-center justify-center rounded-full bg-blue-50 text-blue-700">
+          <svg class="h-6 w-6" aria-hidden="true" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5" d="M12 6v6l4 2" />
+            <circle cx="12" cy="12" r="9" stroke-width="1.5"></circle>
+          </svg>
+        </div>
+        <p class="mt-3 text-sm text-gray-600">Logs will appear here once collection is enabled for this server.</p>
+      </div>
+    </section>
+
+    <section class="rounded-2xl border border-gray-200 bg-white p-6 shadow-sm">
+      <div class="flex flex-wrap items-start justify-between gap-4">
+        <div>
+          <h2 class="text-lg font-semibold text-gray-900">Metrics</h2>
+          <p class="mt-1 text-sm text-gray-500">Monitor CPU, memory, and session activity.</p>
+        </div>
+        <span class="inline-flex items-center rounded-full bg-gray-100 px-2.5 py-1 text-xs font-semibold text-gray-700">Placeholder</span>
+      </div>
+      <div class="mt-5 rounded-xl border border-dashed border-gray-200 bg-gray-50 p-6 text-center">
+        <div class="mx-auto flex h-12 w-12 items-center justify-center rounded-full bg-blue-50 text-blue-700">
+          <svg class="h-6 w-6" aria-hidden="true" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5" d="M3 12h18M7 8v8M17 8v8" />
+          </svg>
+        </div>
+        <p class="mt-3 text-sm text-gray-600">Metrics will appear here once collection is enabled for this server.</p>
+      </div>
+    </section>
+  </div>
+{% endblock %}

app/apps/servers/templates/servers/dashboard.html

@@ -0,0 +1,124 @@
+{% extends "base.html" %}
+
+{% block title %}Servers • Keywarden{% endblock %}
+
+{% block content %}
+  <div class="space-y-6">
+    <div class="flex flex-wrap items-center justify-between gap-4">
+      <div>
+        <h1 class="text-2xl font-semibold tracking-tight text-gray-900">Servers</h1>
+        <p class="mt-1 text-sm text-gray-500">Review the servers you can access and their certificate status.</p>
+      </div>
+      <span class="inline-flex items-center rounded-full bg-blue-50 px-3 py-1 text-xs font-semibold text-blue-700">
+        {{ servers|length }} total
+      </span>
+    </div>
+
+    {% if servers %}
+      <div class="grid gap-5 sm:grid-cols-2 lg:grid-cols-3">
+        {% for item in servers %}
+          <article class="flex h-full flex-col rounded-2xl border border-gray-200 bg-white p-5 shadow-sm transition hover:-translate-y-0.5 hover:shadow-md">
+            <div class="flex items-start justify-between">
+              <div class="flex items-center gap-3">
+                <div class="flex h-10 w-10 items-center justify-center rounded-xl bg-blue-700 text-sm font-semibold text-white">
+                  {{ item.server.initial }}
+                </div>
+                <div>
+                  <h2 class="text-lg font-semibold text-gray-900">{{ item.server.display_name }}</h2>
+                  <p class="text-xs text-gray-500">
+                    {{ item.server.hostname|default:item.server.ipv4|default:item.server.ipv6|default:"Unassigned" }}
+                  </p>
+                </div>
+              </div>
+              <div class="relative">
+                <button
+                  type="button"
+                  data-tooltip-target="server-status-{{ item.server.id }}"
+                  class="{% if item.status.is_active %}inline-flex items-center rounded-full bg-emerald-50 px-2.5 py-1 text-xs font-semibold text-emerald-700{% else %}inline-flex items-center rounded-full bg-rose-50 px-2.5 py-1 text-xs font-semibold text-rose-700{% endif %}"
+                >
+                  {{ item.status.label }}: {{ item.status.detail }}
+                </button>
+                <div
+                  id="server-status-{{ item.server.id }}"
+                  role="tooltip"
+                  class="invisible absolute z-10 inline-block w-64 rounded-lg border border-gray-200 bg-white p-3 text-xs text-gray-700 shadow-sm opacity-0 transition-opacity"
+                >
+                  <div class="space-y-1">
+                    <div class="flex items-center justify-between">
+                      <span class="font-semibold text-gray-500">Status</span>
+                      <span class="font-medium text-gray-900">{{ item.status.label }}: {{ item.status.detail }}</span>
+                    </div>
+                    <div class="flex items-center justify-between">
+                      <span class="font-semibold text-gray-500">Ping</span>
+                      <span class="font-medium text-gray-900">
+                        {% if item.status.ping_ms is not None %}{{ item.status.ping_ms }}ms{% else %}—{% endif %}
+                      </span>
+                    </div>
+                    <div class="flex items-center justify-between">
+                      <span class="font-semibold text-gray-500">Hostname</span>
+                      <span class="font-medium text-gray-900">{{ item.server.hostname|default:"—" }}</span>
+                    </div>
+                    <div class="flex items-center justify-between">
+                      <span class="font-semibold text-gray-500">IPv4</span>
+                      <span class="font-medium text-gray-900">{{ item.server.ipv4|default:"—" }}</span>
+                    </div>
+                    <div class="flex items-center justify-between">
+                      <span class="font-semibold text-gray-500">IPv6</span>
+                      <span class="font-medium text-gray-900">{{ item.server.ipv6|default:"—" }}</span>
+                    </div>
+                    <div class="flex items-center justify-between">
+                      <span class="font-semibold text-gray-500">Last heartbeat</span>
+                      <span class="font-medium text-gray-900">
+                        {% if item.status.heartbeat_at %}{{ item.status.heartbeat_at|date:"M j, Y H:i:s" }}{% else %}—{% endif %}
+                      </span>
+                    </div>
+                  </div>
+                  <div class="tooltip-arrow" data-popper-arrow></div>
+                </div>
+              </div>
+            </div>
+
+            <dl class="mt-5 divide-y divide-gray-100 text-sm text-gray-600">
+              <div class="flex items-center justify-between py-2">
+                <dt>Access until</dt>
+                <dd class="font-medium text-gray-900">
+                  {% if item.expires_at %}
+                    {{ item.expires_at|date:"M j, Y H:i" }}
+                  {% else %}
+                    No expiry
+                  {% endif %}
+                </dd>
+              </div>
+              <div class="flex items-center justify-between py-2">
+                <dt>Last accessed</dt>
+                <dd class="font-medium text-gray-900">
+                  {% if item.last_accessed %}
+                    {{ item.last_accessed|date:"M j, Y H:i" }}
+                  {% else %}
+                    —
+                  {% endif %}
+                </dd>
+              </div>
+            </dl>
+
+            <div class="mt-5 flex items-center justify-between border-t border-gray-100 pt-4 text-xs text-gray-500">
+              <span>Certificates and access</span>
+              <a href="{% url 'servers:detail' item.server.id %}" class="font-semibold text-blue-700 hover:underline">View details</a>
+            </div>
+          </article>
+        {% endfor %}
+      </div>
+    {% else %}
+      <div class="rounded-2xl border border-dashed border-gray-200 bg-white p-10 text-center">
+        <div class="mx-auto flex h-12 w-12 items-center justify-center rounded-full bg-blue-50 text-blue-700">
+          <svg class="h-6 w-6" aria-hidden="true" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5" d="M12 6v6l4 2" />
+            <circle cx="12" cy="12" r="9" stroke-width="1.5"></circle>
+          </svg>
+        </div>
+        <h2 class="mt-4 text-lg font-semibold text-gray-900">No server access yet</h2>
+        <p class="mt-2 text-sm text-gray-600">Request access to a server to see it listed here.</p>
+      </div>
+    {% endif %}
+  </div>
+{% endblock %}

app/apps/servers/templates/servers/detail.html

@@ -0,0 +1,188 @@
+{% extends "base.html" %}
+
+{% block title %}{{ server.display_name }} • Keywarden{% endblock %}
+
+{% block content %}
+  <div class="space-y-6">
+    {% include "servers/_header.html" %}
+
+    <section class="grid gap-4 lg:grid-cols-3">
+      <div class="rounded-2xl border border-gray-200 bg-white p-6 shadow-sm">
+        <h2 class="text-lg font-semibold text-gray-900">Server details</h2>
+        <dl class="mt-4 divide-y divide-gray-100 text-sm text-gray-600">
+          <div class="flex items-center justify-between py-2">
+            <dt>Hostname</dt>
+            <dd class="font-medium text-gray-900">{{ server.hostname|default:"—" }}</dd>
+          </div>
+          <div class="flex items-center justify-between py-2">
+            <dt>IPv4</dt>
+            <dd class="font-medium text-gray-900">{{ server.ipv4|default:"—" }}</dd>
+          </div>
+          <div class="flex items-center justify-between py-2">
+            <dt>IPv6</dt>
+            <dd class="font-medium text-gray-900">{{ server.ipv6|default:"—" }}</dd>
+          </div>
+        </dl>
+      </div>
+
+      <div class="rounded-2xl border border-gray-200 bg-white p-6 shadow-sm lg:col-span-2">
+        <div class="flex flex-wrap items-start justify-between gap-4">
+          <div>
+            <h2 class="text-lg font-semibold text-gray-900">Account & certificate</h2>
+            <p class="mt-1 text-sm text-gray-500">Credentials and certificate download options.</p>
+          </div>
+          <span class="inline-flex items-center rounded-full bg-blue-50 px-2.5 py-1 text-xs font-semibold text-blue-700">Access</span>
+        </div>
+
+        <dl class="mt-4 divide-y divide-gray-100 text-sm text-gray-600">
+          <div class="flex items-center justify-between py-2">
+            <dt>Account name</dt>
+            <dd class="font-medium text-gray-900">
+              {% if system_username %}
+                {{ system_username }}
+              {% else %}
+                Unknown
+              {% endif %}
+            </dd>
+          </div>
+          <div class="flex items-center justify-between py-2">
+            <dt>Account status</dt>
+            <dd class="font-medium text-gray-900">
+              {% if account_present is None %}
+                Unknown
+              {% elif account_present %}
+                Present
+              {% else %}
+                Not on server
+              {% endif %}
+            </dd>
+          </div>
+          <div class="flex flex-col gap-3 py-2 sm:flex-row sm:items-center sm:justify-between">
+            <dt>Certificate</dt>
+            <dd class="font-medium text-gray-900">
+              {% if certificate_key_id %}
+                <div class="flex flex-wrap items-center gap-2">
+                  <div class="inline-flex rounded-lg shadow-sm" role="group">
+                    <button
+                      type="button"
+                      class="inline-flex items-center rounded-l-lg bg-blue-700 px-3 py-1.5 text-xs font-semibold text-white hover:bg-blue-800 focus:outline-none focus:ring-2 focus:ring-blue-300"
+                      data-download-url="/api/v1/keys/{{ certificate_key_id }}/certificate"
+                    >
+                      Download
+                    </button>
+                    <button
+                      type="button"
+                      class="inline-flex items-center rounded-r-lg border border-gray-200 bg-white px-3 py-1.5 text-xs font-semibold text-gray-700 hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-blue-300"
+                      data-download-url="/api/v1/keys/{{ certificate_key_id }}/certificate.sha256"
+                    >
+                      Hash
+                    </button>
+                  </div>
+                  <button
+                    type="button"
+                    class="inline-flex items-center rounded-lg bg-rose-600 px-3 py-1.5 text-xs font-semibold text-white hover:bg-rose-700 focus:outline-none focus:ring-2 focus:ring-rose-300 js-regenerate-cert"
+                    data-key-id="{{ certificate_key_id }}"
+                  >
+                    Regenerate
+                  </button>
+                </div>
+              {% else %}
+                <span class="text-xs font-semibold text-gray-500">Upload a key to download</span>
+              {% endif %}
+            </dd>
+          </div>
+        </dl>
+      </div>
+
+      <div class="rounded-2xl border border-gray-200 bg-white p-6 shadow-sm lg:col-span-3">
+        <div class="flex flex-wrap items-start justify-between gap-4">
+          <div>
+            <h2 class="text-lg font-semibold text-gray-900">Access</h2>
+            <p class="mt-1 text-sm text-gray-500">Review access windows and last usage.</p>
+          </div>
+          <span class="inline-flex items-center rounded-full bg-gray-100 px-2.5 py-1 text-xs font-semibold text-gray-700">Usage</span>
+        </div>
+        <dl class="mt-4 divide-y divide-gray-100 text-sm text-gray-600">
+          <div class="flex items-center justify-between py-2">
+            <dt>Access until</dt>
+            <dd class="font-medium text-gray-900">
+              {% if expires_at %}
+                {{ expires_at|date:"M j, Y H:i" }}
+              {% else %}
+                No expiry
+              {% endif %}
+            </dd>
+          </div>
+          <div class="flex items-center justify-between py-2">
+            <dt>Last accessed</dt>
+            <dd class="font-medium text-gray-900">
+              {% if last_accessed %}
+                {{ last_accessed|date:"M j, Y H:i" }}
+              {% else %}
+                —
+              {% endif %}
+            </dd>
+          </div>
+        </dl>
+      </div>
+    </section>
+  </div>
+  <script>
+    (function () {
+      function getCookie(name) {
+        var value = "; " + document.cookie;
+        var parts = value.split("; " + name + "=");
+        if (parts.length === 2) {
+          return parts.pop().split(";").shift();
+        }
+        return "";
+      }
+
+      function handleDownload(event) {
+        var button = event.currentTarget;
+        var url = button.getAttribute("data-download-url");
+        if (!url) {
+          return;
+        }
+        window.location.href = url;
+      }
+
+      function handleRegenerate(event) {
+        var button = event.currentTarget;
+        var keyId = button.getAttribute("data-key-id");
+        if (!keyId) {
+          return;
+        }
+        if (!window.confirm("Regenerate the certificate for this key?")) {
+          return;
+        }
+        var csrf = getCookie("csrftoken");
+        fetch("/api/v1/keys/" + keyId + "/certificate", {
+          method: "POST",
+          credentials: "same-origin",
+          headers: {
+            "X-CSRFToken": csrf,
+          },
+        })
+          .then(function (response) {
+            if (!response.ok) {
+              throw new Error("Certificate regeneration failed.");
+            }
+            window.alert("Certificate regenerated.");
+          })
+          .catch(function (err) {
+            window.alert(err.message);
+          });
+      }
+
+      var downloadButtons = document.querySelectorAll("[data-download-url]");
+      for (var i = 0; i < downloadButtons.length; i += 1) {
+        downloadButtons[i].addEventListener("click", handleDownload);
+      }
+      var buttons = document.querySelectorAll(".js-regenerate-cert");
+      for (var j = 0; j < buttons.length; j += 1) {
+        buttons[j].addEventListener("click", handleRegenerate);
+      }
+    })();
+  </script>
+{% endblock %}

app/apps/servers/templates/servers/settings.html

@@ -0,0 +1,28 @@
+{% extends "base.html" %}
+
+{% block title %}Settings • {{ server.display_name }} • Keywarden{% endblock %}
+
+{% block content %}
+  <div class="space-y-6">
+    {% include "servers/_header.html" %}
+
+    <section class="rounded-2xl border border-gray-200 bg-white p-6 shadow-sm">
+      <div class="flex flex-wrap items-start justify-between gap-4">
+        <div>
+          <h2 class="text-lg font-semibold text-gray-900">Settings</h2>
+          <p class="mt-1 text-sm text-gray-500">Manage server-level access policies and metadata.</p>
+        </div>
+        <span class="inline-flex items-center rounded-full bg-gray-100 px-2.5 py-1 text-xs font-semibold text-gray-700">Placeholder</span>
+      </div>
+      <div class="mt-5 rounded-xl border border-dashed border-gray-200 bg-gray-50 p-6 text-center">
+        <div class="mx-auto flex h-12 w-12 items-center justify-center rounded-full bg-blue-50 text-blue-700">
+          <svg class="h-6 w-6" aria-hidden="true" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5" d="M12 6v6l4 2" />
+            <circle cx="12" cy="12" r="9" stroke-width="1.5"></circle>
+          </svg>
+        </div>
+        <p class="mt-3 text-sm text-gray-600">Settings will appear here as server options are added.</p>
+      </div>
+    </section>
+  </div>
+{% endblock %}

app/apps/servers/templates/servers/shell.html

@@ -0,0 +1,389 @@
+{% extends "base.html" %}
+{% load static %}
+
+{% block title %}Shell • {{ server.display_name }} • Keywarden{% endblock %}
+
+{% block extra_head %}
+  <link rel="stylesheet" href="{% static 'vendor/xterm/xterm.css' %}">
+  {% if is_popout %}
+    <style>
+      body.popout-shell main {
+        max-width: none !important;
+        padding: 0 !important;
+      }
+    </style>
+  {% endif %}
+{% endblock %}
+
+{% block content %}
+  {% if is_popout %}
+    <div class="w-screen">
+      <div id="shell-popout-shell" class="w-full rounded-2xl border border-gray-200 bg-slate-950 shadow-sm">
+        <div id="shell-terminal" class="h-full w-full p-3"></div>
+      </div>
+    </div>
+  {% else %}
+    <div class="space-y-6">
+      {% include "servers/_header.html" %}
+
+      <section class="rounded-2xl border border-gray-200 bg-white p-6 shadow-sm">
+        <div class="flex flex-wrap items-center justify-between gap-3">
+          <div>
+            <h2 class="text-lg font-semibold text-gray-900">Shell access</h2>
+            <p class="mt-1 text-sm text-gray-500">
+              Connect with your private key and the signed certificate for this server.
+            </p>
+          </div>
+          <button
+            type="button"
+            class="inline-flex items-center rounded-lg border border-gray-200 bg-white px-3 py-2 text-xs font-semibold text-gray-700 hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-blue-300"
+            id="shell-popout"
+            data-popout-url="{% url 'servers:shell' server.id %}?popout=1"
+          >
+            Pop out terminal
+          </button>
+        </div>
+
+        <div class="mt-5 grid gap-4 text-sm text-gray-600 lg:grid-cols-2">
+          <dl class="space-y-4">
+            <div class="flex items-center justify-between">
+              <dt>Account name</dt>
+              <dd class="font-medium text-gray-900">
+                {% if system_username %}
+                  {{ system_username }}
+                {% else %}
+                  Unknown
+                {% endif %}
+              </dd>
+            </div>
+            <div class="flex items-center justify-between">
+              <dt>Host</dt>
+              <dd class="font-medium text-gray-900">
+                {% if shell_target %}
+                  {{ shell_target }}
+                {% else %}
+                  Unknown
+                {% endif %}
+              </dd>
+            </div>
+          </dl>
+
+          {% if shell_command %}
+            <div class="rounded-xl border border-gray-200 bg-gray-50 p-4">
+              <div class="flex flex-wrap items-center justify-between gap-2">
+                <span class="text-xs font-semibold uppercase tracking-wide text-gray-500">SSH command</span>
+                <button
+                  type="button"
+                  class="text-xs font-semibold text-blue-700 hover:underline"
+                  data-copy-target="shell-command"
+                >
+                  Copy command
+                </button>
+              </div>
+              <code class="mt-3 block break-all rounded-lg bg-white p-3 text-xs text-gray-800" id="shell-command">{{ shell_command }}</code>
+              <div class="mt-4 flex flex-wrap items-center gap-2">
+                {% if certificate_key_id %}
+                  <div class="inline-flex rounded-lg shadow-sm" role="group">
+                    <button
+                      type="button"
+                      class="inline-flex items-center rounded-l-lg bg-blue-700 px-3 py-1.5 text-xs font-semibold text-white hover:bg-blue-800 focus:outline-none focus:ring-2 focus:ring-blue-300"
+                      data-download-url="/api/v1/keys/{{ certificate_key_id }}/certificate"
+                    >
+                      Download
+                    </button>
+                    <button
+                      type="button"
+                      class="inline-flex items-center rounded-r-lg border border-gray-200 bg-white px-3 py-1.5 text-xs font-semibold text-gray-700 hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-blue-300"
+                      data-download-url="/api/v1/keys/{{ certificate_key_id }}/certificate.sha256"
+                    >
+                      Hash
+                    </button>
+                  </div>
+                  <button
+                    type="button"
+                    class="inline-flex items-center rounded-lg bg-rose-600 px-3 py-1.5 text-xs font-semibold text-white hover:bg-rose-700 focus:outline-none focus:ring-2 focus:ring-rose-300 js-regenerate-cert"
+                    data-key-id="{{ certificate_key_id }}"
+                  >
+                    Regenerate
+                  </button>
+                {% endif %}
+                <span class="text-xs text-gray-500">Use the command above for local SSH.</span>
+              </div>
+            </div>
+          {% else %}
+            <p class="text-sm text-gray-600">Upload a key to enable downloads and a local SSH command.</p>
+          {% endif %}
+        </div>
+      </section>
+
+      <section class="rounded-2xl border border-gray-200 bg-white p-6 shadow-sm">
+        <div class="flex flex-wrap items-center justify-between gap-3">
+          <div>
+            <h2 class="text-lg font-semibold text-gray-900">Browser terminal</h2>
+            <p class="mt-1 text-sm text-gray-500">
+              Launch a proxied terminal session to the target host in your browser.
+            </p>
+          </div>
+          <div class="flex items-center gap-2">
+            <span class="inline-flex items-center rounded-full bg-amber-100 px-2.5 py-1 text-xs font-semibold text-amber-800">Beta</span>
+            <button
+              type="button"
+              class="inline-flex items-center rounded-lg bg-blue-700 px-3 py-2 text-xs font-semibold text-white hover:bg-blue-800 focus:outline-none focus:ring-4 focus:ring-blue-300"
+              id="shell-start"
+            >
+              Start terminal
+            </button>
+          </div>
+        </div>
+        <div class="mt-4 rounded-xl border border-gray-200 bg-slate-950 p-2">
+          <div id="shell-terminal" class="h-96"></div>
+        </div>
+        <p class="mt-3 text-xs text-gray-500">
+          Sessions are proxied through Keywarden and end when this page closes.
+        </p>
+      </section>
+    </div>
+  {% endif %}
+
+  <script src="{% static 'vendor/xterm/xterm.js' %}"></script>
+  <script>
+    (function () {
+      function getCookie(name) {
+        var value = "; " + document.cookie;
+        var parts = value.split("; " + name + "=");
+        if (parts.length === 2) {
+          return parts.pop().split(";").shift();
+        }
+        return "";
+      }
+
+      function handleDownload(event) {
+        var button = event.currentTarget;
+        var url = button.getAttribute("data-download-url");
+        if (!url) {
+          return;
+        }
+        window.location.href = url;
+      }
+
+      function handleRegenerate(event) {
+        var button = event.currentTarget;
+        var keyId = button.getAttribute("data-key-id");
+        if (!keyId) {
+          return;
+        }
+        if (!window.confirm("Regenerate the certificate for this key?")) {
+          return;
+        }
+        var csrf = getCookie("csrftoken");
+        fetch("/api/v1/keys/" + keyId + "/certificate", {
+          method: "POST",
+          credentials: "same-origin",
+          headers: {
+            "X-CSRFToken": csrf,
+          },
+        })
+          .then(function (response) {
+            if (!response.ok) {
+              throw new Error("Certificate regeneration failed.");
+            }
+            window.alert("Certificate regenerated.");
+          })
+          .catch(function (err) {
+            window.alert(err.message);
+          });
+      }
+
+      function handleCopy(event) {
+        var targetId = event.currentTarget.getAttribute("data-copy-target");
+        if (!targetId) {
+          return;
+        }
+        var node = document.getElementById(targetId);
+        if (!node) {
+          return;
+        }
+        var text = node.textContent || "";
+        if (!navigator.clipboard || !text) {
+          return;
+        }
+        navigator.clipboard.writeText(text).then(function () {
+          window.alert("Command copied.");
+        });
+      }
+
+      var popout = document.getElementById("shell-popout");
+      if (popout) {
+        popout.addEventListener("click", function () {
+          var url = popout.getAttribute("data-popout-url");
+          if (!url) {
+            return;
+          }
+          window.open(url, "_blank", "width=900,height=700");
+        });
+      }
+
+      var downloadButtons = document.querySelectorAll("[data-download-url]");
+      for (var i = 0; i < downloadButtons.length; i += 1) {
+        downloadButtons[i].addEventListener("click", handleDownload);
+      }
+      var buttons = document.querySelectorAll(".js-regenerate-cert");
+      for (var j = 0; j < buttons.length; j += 1) {
+        buttons[j].addEventListener("click", handleRegenerate);
+      }
+      var copyButtons = document.querySelectorAll("[data-copy-target]");
+      for (var k = 0; k < copyButtons.length; k += 1) {
+        copyButtons[k].addEventListener("click", handleCopy);
+      }
+
+      var termContainer = document.getElementById("shell-terminal");
+      var startButton = document.getElementById("shell-start");
+      var activeSocket = null;
+      var activeTerm = null;
+      var popoutShell = document.getElementById("shell-popout-shell");
+      var isPopout = {{ is_popout|yesno:"true,false" }};
+
+      function sizePopoutTerminal() {
+        if (!isPopout || !popoutShell || !termContainer) {
+          return;
+        }
+        var padding = 24;
+        var height = Math.max(320, window.innerHeight - padding);
+        popoutShell.style.height = height + "px";
+        termContainer.style.height = (height - 8) + "px";
+      }
+
+      function fitTerminal(term) {
+        if (!termContainer || !term || !term._core || !term._core._renderService) {
+          return;
+        }
+        var dims = term._core._renderService.dimensions;
+        if (!dims || !dims.css || !dims.css.cell) {
+          return;
+        }
+        var cellWidth = dims.css.cell.width || 9;
+        var cellHeight = dims.css.cell.height || 18;
+        if (!cellWidth || !cellHeight) {
+          return;
+        }
+        var cols = Math.max(20, Math.floor(termContainer.clientWidth / cellWidth));
+        var rows = Math.max(10, Math.floor(termContainer.clientHeight / cellHeight));
+        term.resize(cols, rows);
+      }
+
+      function setButtonState(isRunning) {
+        if (!startButton) {
+          return;
+        }
+        startButton.disabled = false;
+        startButton.textContent = isRunning ? "Stop terminal" : "Start terminal";
+        startButton.classList.toggle("bg-red-600", isRunning);
+        startButton.classList.toggle("hover:bg-red-700", isRunning);
+        startButton.classList.toggle("bg-blue-700", !isRunning);
+        startButton.classList.toggle("hover:bg-blue-800", !isRunning);
+      }
+
+      function stopTerminal() {
+        if (activeSocket) {
+          try {
+            activeSocket.close();
+          } catch (err) {
+            // noop
+          }
+        }
+        if (termContainer) {
+          termContainer.dataset.started = "0";
+        }
+        activeSocket = null;
+        activeTerm = null;
+        setButtonState(false);
+      }
+
+      function startTerminal() {
+        if (!termContainer || !window.Terminal || termContainer.dataset.started === "1") {
+          return;
+        }
+        termContainer.dataset.started = "1";
+        if (startButton) {
+          startButton.disabled = true;
+          startButton.textContent = "Starting...";
+        }
+        var term = new window.Terminal({
+          cursorBlink: true,
+          fontFamily: "ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace",
+          fontSize: 13,
+          theme: {
+            background: "#0b1120",
+            foreground: "#e2e8f0",
+            cursor: "#38bdf8"
+          }
+        });
+        term.open(termContainer);
+        setTimeout(function () {
+          fitTerminal(term);
+        }, 0);
+
+        var protocol = window.location.protocol === "https:" ? "wss" : "ws";
+        var socketUrl = protocol + "://" + window.location.host + "/ws/servers/{{ server.id }}/shell/";
+        var socket = new WebSocket(socketUrl);
+        socket.binaryType = "arraybuffer";
+        activeSocket = socket;
+        activeTerm = term;
+
+        socket.onmessage = function (event) {
+          if (typeof event.data === "string") {
+            term.write(event.data);
+            return;
+          }
+          var data = new Uint8Array(event.data);
+          var text = new TextDecoder("utf-8").decode(data);
+          term.write(text);
+        };
+
+        socket.onclose = function () {
+          term.write("\r\nSession closed.\r\n");
+          if (activeSocket === socket) {
+            stopTerminal();
+          }
+        };
+
+        term.onData(function (data) {
+          if (socket.readyState === WebSocket.OPEN) {
+            socket.send(data);
+          }
+        });
+
+        setButtonState(true);
+
+        if (isPopout) {
+          var onResize = function () {
+            sizePopoutTerminal();
+            fitTerminal(term);
+          };
+          window.addEventListener("resize", onResize);
+        }
+      }
+
+      if (termContainer && window.Terminal) {
+        if (isPopout) {
+          document.body.classList.add("popout-shell");
+          sizePopoutTerminal();
+          window.addEventListener("resize", sizePopoutTerminal);
+        }
+        if (startButton) {
+          startButton.addEventListener("click", function () {
+            if (termContainer.dataset.started === "1") {
+              stopTerminal();
+              return;
+            }
+            startTerminal();
+          });
+        } else {
+          startTerminal();
+        }
+      } else if (termContainer) {
+        termContainer.textContent = "Terminal assets failed to load.";
+      }
+    })();
+  </script>
+{% endblock %}

app/apps/servers/urls.py

@@ -0,0 +1,13 @@
+from django.urls import path
+
+from . import views
+
+app_name = "servers"
+
+urlpatterns = [
+    path("", views.dashboard, name="dashboard"),
+    path("<int:server_id>/", views.detail, name="detail"),
+    path("<int:server_id>/audit/", views.audit, name="audit"),
+    path("<int:server_id>/shell/", views.shell, name="shell"),
+    path("<int:server_id>/settings/", views.settings, name="settings"),
+]

app/apps/servers/views.py

@@ -0,0 +1,230 @@
+from __future__ import annotations
+
+from datetime import timedelta
+
+from django.conf import settings
+from django.contrib.auth.decorators import login_required
+from django.db.models import Q
+from django.http import Http404
+from django.shortcuts import render
+from django.utils import timezone
+from guardian.shortcuts import get_objects_for_user, get_perms
+
+from apps.access.models import AccessRequest
+from apps.keys.utils import render_system_username
+from apps.keys.models import SSHKey
+from apps.servers.models import Server, ServerAccount
+from apps.servers.permissions import user_can_shell
+
+
+@login_required(login_url="/accounts/login/")
+def dashboard(request):
+    now = timezone.now()
+    server_qs = get_objects_for_user(
+        request.user,
+        "servers.view_server",
+        klass=Server,
+        accept_global_perms=False,
+    )
+
+    access_qs = (
+        AccessRequest.objects.select_related("server")
+        .filter(
+            requester=request.user,
+            status=AccessRequest.Status.APPROVED,
+        )
+        .filter(Q(expires_at__isnull=True) | Q(expires_at__gt=now))
+    )
+    expires_map = {}
+    for access in access_qs:
+        expires_at = access.expires_at
+        if access.server_id not in expires_map:
+            expires_map[access.server_id] = expires_at
+            continue
+        current = expires_map[access.server_id]
+        if current is None:
+            continue
+        if expires_at is None or expires_at > current:
+            expires_map[access.server_id] = expires_at
+
+    servers = []
+    for server in server_qs:
+        servers.append(
+            {
+                "server": server,
+                "expires_at": expires_map.get(server.id),
+                "last_accessed": None,
+                "status": _build_server_status(server, now),
+            }
+        )
+
+    context = {
+        "servers": servers,
+    }
+    return render(request, "servers/dashboard.html", context)
+
+
+@login_required(login_url="/accounts/login/")
+def detail(request, server_id: int):
+    now = timezone.now()
+    # Authorization is enforced via object-level permissions before we do
+    # any other server-specific work.
+    server = _get_server_or_404(request, server_id)
+    can_shell = user_can_shell(request.user, server, now)
+
+    access = (
+        AccessRequest.objects.filter(
+            requester=request.user,
+            server_id=server_id,
+            status=AccessRequest.Status.APPROVED,
+        )
+        .filter(Q(expires_at__isnull=True) | Q(expires_at__gt=now))
+        .order_by("-requested_at")
+        .first()
+    )
+
+    account, system_username, certificate_key_id = _load_account_context(request, server)
+    context = {
+        "server": server,
+        "expires_at": access.expires_at if access else None,
+        "last_accessed": None,
+        "account_present": account.is_present if account else None,
+        "account_synced_at": account.last_synced_at if account else None,
+        "system_username": system_username,
+        "certificate_key_id": certificate_key_id,
+        "active_tab": "details",
+        "can_shell": can_shell,
+        "server_status": _build_server_status(server, now),
+    }
+    return render(request, "servers/detail.html", context)
+
+
+@login_required(login_url="/accounts/login/")
+def shell(request, server_id: int):
+    now = timezone.now()
+    server = _get_server_or_404(request, server_id)
+    # We intentionally return a 404 on denied shell access to avoid
+    # disclosing that the server exists but is restricted.
+    if not user_can_shell(request.user, server):
+        raise Http404("Shell access not available")
+    _, system_username, certificate_key_id = _load_account_context(request, server)
+    shell_target = server.hostname or server.ipv4 or server.ipv6 or ""
+    cert_filename = ""
+    if certificate_key_id:
+        cert_filename = f"keywarden-{request.user.id}-{certificate_key_id}-cert.pub"
+    command = ""
+    if shell_target and system_username and certificate_key_id:
+        command = (
+            "ssh -i /path/to/private_key "
+            f"-o CertificateFile=~/Downloads/{cert_filename} "
+            f"{system_username}@{shell_target} -t /bin/bash"
+        )
+    context = {
+        "server": server,
+        "system_username": system_username,
+        "certificate_key_id": certificate_key_id,
+        "shell_target": shell_target,
+        "shell_command": command,
+        "cert_filename": cert_filename,
+        "active_tab": "shell",
+        "is_popout": request.GET.get("popout") == "1",
+        "can_shell": True,
+        "server_status": _build_server_status(server, now),
+    }
+    return render(request, "servers/shell.html", context)
+
+
+@login_required(login_url="/accounts/login/")
+def audit(request, server_id: int):
+    now = timezone.now()
+    server = _get_server_or_404(request, server_id)
+    context = {
+        "server": server,
+        "active_tab": "audit",
+        "can_shell": user_can_shell(request.user, server),
+        "server_status": _build_server_status(server, now),
+    }
+    return render(request, "servers/audit.html", context)
+
+
+@login_required(login_url="/accounts/login/")
+def settings(request, server_id: int):
+    now = timezone.now()
+    server = _get_server_or_404(request, server_id)
+    context = {
+        "server": server,
+        "active_tab": "settings",
+        "can_shell": user_can_shell(request.user, server),
+        "server_status": _build_server_status(server, now),
+    }
+    return render(request, "servers/settings.html", context)
+
+
+def _get_server_or_404(request, server_id: int) -> Server:
+    # Centralized object lookup + permission gate. We raise 404 for both
+    # missing objects and permission denials to reduce enumeration signals.
+    try:
+        server = Server.objects.get(id=server_id)
+    except Server.DoesNotExist:
+        raise Http404("Server not found")
+    if "view_server" not in get_perms(request.user, server):
+        raise Http404("Server not found")
+    return server
+
+
+def _load_account_context(request, server: Server):
+    # Resolve the effective system username and the currently active SSH
+    # key/certificate context used by the shell UI.
+    account = ServerAccount.objects.filter(server=server, user=request.user).first()
+    system_username = account.system_username if account else render_system_username(
+        request.user.username, request.user.id
+    )
+    active_key = SSHKey.objects.filter(user=request.user, is_active=True).order_by("-created_at").first()
+    certificate_key_id = active_key.id if active_key else None
+    return account, system_username, certificate_key_id
+
+
+def _format_age_short(delta: timedelta) -> str:
+    seconds = max(0, int(delta.total_seconds()))
+    if seconds < 60:
+        return f"{seconds}s"
+    minutes = seconds // 60
+    rem_seconds = seconds % 60
+    if minutes < 60:
+        return f"{minutes}m {rem_seconds}s"
+    hours = minutes // 60
+    rem_minutes = minutes % 60
+    if hours < 48:
+        return f"{hours}h {rem_minutes}m {rem_seconds}s"
+    days = hours // 24
+    if days < 14:
+        return f"{days}d {hours % 24}h"
+    weeks = days // 7
+    return f"{weeks}w {days % 7}d"
+
+
+def _build_server_status(server: Server, now):
+    stale_seconds = int(getattr(settings, "KEYWARDEN_HEARTBEAT_STALE_SECONDS", 120))
+    heartbeat_at = getattr(server, "last_heartbeat_at", None)
+    ping_ms = getattr(server, "last_ping_ms", None)
+    if heartbeat_at:
+        age = now - heartbeat_at
+        age_seconds = max(0, int(age.total_seconds()))
+        is_active = age_seconds <= stale_seconds
+        age_short = _format_age_short(age)
+    else:
+        is_active = False
+        age_short = "never"
+    label = "Active" if is_active else "Inactive"
+    if is_active:
+        detail = f"{ping_ms}ms" if ping_ms is not None else "—"
+    else:
+        detail = age_short
+    return {
+        "is_active": is_active,
+        "label": label,
+        "detail": detail,
+        "ping_ms": ping_ms,
+        "age_short": age_short,
+        "heartbeat_at": heartbeat_at,
+    }

app/apps/telemetry/admin.py

@@ -0,0 +1,11 @@
+from django.contrib import admin
+
+from .models import TelemetryEvent
+
+
+@admin.register(TelemetryEvent)
+class TelemetryEventAdmin(admin.ModelAdmin):
+    list_display = ("id", "event_type", "server", "user", "success", "source", "created_at")
+    list_filter = ("success", "source", "event_type")
+    search_fields = ("event_type", "message", "server__display_name", "user__username")
+    ordering = ("-created_at",)

app/apps/telemetry/apps.py

@@ -0,0 +1,7 @@
+from django.apps import AppConfig
+
+
+class TelemetryConfig(AppConfig):
+    default_auto_field = "django.db.models.BigAutoField"
+    name = "apps.telemetry"
+    verbose_name = "Telemetry"

app/apps/telemetry/migrations/0001_initial.py

@@ -0,0 +1,73 @@
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ("servers", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="TelemetryEvent",
+            fields=[
+                ("id", models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name="ID")),
+                ("event_type", models.CharField(db_index=True, max_length=64)),
+                ("success", models.BooleanField(db_index=True, default=True)),
+                (
+                    "source",
+                    models.CharField(
+                        choices=[
+                            ("agent", "Agent"),
+                            ("api", "API"),
+                            ("ui", "UI"),
+                            ("system", "System"),
+                        ],
+                        db_index=True,
+                        default="api",
+                        max_length=16,
+                    ),
+                ),
+                ("message", models.TextField(blank=True)),
+                ("metadata", models.JSONField(blank=True, default=dict)),
+                ("created_at", models.DateTimeField(db_index=True, default=django.utils.timezone.now, editable=False)),
+                (
+                    "server",
+                    models.ForeignKey(
+                        blank=True,
+                        null=True,
+                        on_delete=django.db.models.deletion.SET_NULL,
+                        related_name="telemetry_events",
+                        to="servers.server",
+                    ),
+                ),
+                (
+                    "user",
+                    models.ForeignKey(
+                        blank=True,
+                        null=True,
+                        on_delete=django.db.models.deletion.SET_NULL,
+                        related_name="telemetry_events",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+            ],
+            options={
+                "verbose_name": "Telemetry event",
+                "verbose_name_plural": "Telemetry events",
+                "ordering": ["-created_at"],
+                "indexes": [
+                    models.Index(fields=["created_at"], name="telemetry_created_at_idx"),
+                    models.Index(fields=["event_type"], name="telemetry_event_type_idx"),
+                    models.Index(fields=["server", "created_at"], name="telemetry_server_created_idx"),
+                    models.Index(fields=["user", "created_at"], name="telemetry_user_created_idx"),
+                ],
+            },
+        ),
+    ]

app/apps/telemetry/models.py

@@ -0,0 +1,48 @@
+from __future__ import annotations
+
+from django.conf import settings
+from django.db import models
+from django.utils import timezone
+
+from apps.servers.models import Server
+
+
+class TelemetryEvent(models.Model):
+    class Source(models.TextChoices):
+        AGENT = "agent", "Agent"
+        API = "api", "API"
+        UI = "ui", "UI"
+        SYSTEM = "system", "System"
+
+    event_type = models.CharField(max_length=64, db_index=True)
+    server = models.ForeignKey(
+        Server, null=True, blank=True, on_delete=models.SET_NULL, related_name="telemetry_events"
+    )
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        null=True,
+        blank=True,
+        on_delete=models.SET_NULL,
+        related_name="telemetry_events",
+    )
+    success = models.BooleanField(default=True, db_index=True)
+    source = models.CharField(
+        max_length=16, choices=Source.choices, default=Source.API, db_index=True
+    )
+    message = models.TextField(blank=True)
+    metadata = models.JSONField(default=dict, blank=True)
+    created_at = models.DateTimeField(default=timezone.now, editable=False, db_index=True)
+
+    class Meta:
+        verbose_name = "Telemetry event"
+        verbose_name_plural = "Telemetry events"
+        indexes = [
+            models.Index(fields=["created_at"], name="telemetry_created_at_idx"),
+            models.Index(fields=["event_type"], name="telemetry_event_type_idx"),
+            models.Index(fields=["server", "created_at"], name="telemetry_server_created_idx"),
+            models.Index(fields=["user", "created_at"], name="telemetry_user_created_idx"),
+        ]
+        ordering = ["-created_at"]
+
+    def __str__(self) -> str:
+        return f"{self.event_type} ({'ok' if self.success else 'fail'})"

app/entrypoint.sh

@@ -1,6 +1,31 @@
 #!/bin/sh
 set -eu
 
+DOMAIN="${KEYWARDEN_DOMAIN:-localhost}"
+CERT_DIR="/etc/nginx/certs"
+NGINX_TEMPLATE="/etc/nginx/nginx.conf.template"
+NGINX_CONF="/etc/nginx/nginx.conf"
+
+# Replaces server_name in nginx.conf with $KEYWARDEN_DOMAIN
+if [ -f "$NGINX_TEMPLATE" ]; then
+    ESCAPED_DOMAIN=$(printf '%s' "$DOMAIN" | sed 's/[&/]/\\&/g')
+    sed "s/__SERVER_NAME__/${ESCAPED_DOMAIN}/g" "$NGINX_TEMPLATE" > "$NGINX_CONF"
+fi
+
+# Creates self-signed certs using mkcert $KEYWARDEN_DOMAIN, and renaming them.
+if [ ! -f "$CERT_DIR/certificate.pem" ] || [ ! -f "$CERT_DIR/key.pem" ]; then
+    mkdir -p "$CERT_DIR"
+    if command -v mkcert >/dev/null 2>&1; then
+        mkcert -install >/dev/null 2>&1 || true
+        mkcert -cert-file "$CERT_DIR/certificate.pem" -key-file "$CERT_DIR/key.pem" "$DOMAIN"
+    else
+        openssl req -x509 -nodes -newkey rsa:2048 -days 365 \
+            -subj "/CN=$DOMAIN" \
+            -keyout "$CERT_DIR/key.pem" \
+            -out "$CERT_DIR/certificate.pem"
+    fi
+fi
+
 # Build Tailwind CSS (best-effort; skip if not configured)
 python manage.py tailwind install || true
 python manage.py tailwind build || true
@@ -12,4 +37,3 @@ python manage.py migrate --noinput
 python manage.py ensure_admin
 
 exec /usr/bin/supervisord -c /etc/supervisor/supervisord.conf
-

app/keywarden/__init__.py

@@ -0,0 +1,3 @@
+from .celery import app as celery_app
+
+__all__ = ("celery_app",)