Initial linux agent and api functionality for enrolling servers

.env.example

@@ -21,6 +21,7 @@ KEYWARDEN_ADMIN_PASSWORD=password
 # Auth mode: native | oidc | hybrid
 KEYWARDEN_AUTH_MODE=native
 
+
 # OIDC (optional)
 # KEYWARDEN_OIDC_CLIENT_ID=
 # KEYWARDEN_OIDC_CLIENT_SECRET=

agent/README.md

@@ -0,0 +1,23 @@
+# keywarden-agent
+
+Minimal Go agent scaffold 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.
+
+See `config.example.json`.

agent/cmd/keywarden-agent/main.go

@@ -0,0 +1,223 @@
+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/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 := apiClient.SyncAccounts(ctx, cfg.ServerID); err != nil {
+		log.Printf("sync accounts error: %v", err)
+	}
+	if err := shipLogs(ctx, apiClient, cfg); err != nil {
+		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 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 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
+	}
+	hostname, _ := os.Hostname()
+	resp, err := client.Enroll(context.Background(), cfg.ServerURL, client.EnrollRequest{
+		Token:  enrollToken,
+		CSRPEM: csrPEM,
+		Host:   hostname,
+	})
+	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 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 +1,14 @@
+{
+  "server_url": "https://keywarden.example.com",
+  "server_id": "",
+  "sync_interval_seconds": 30,
+  "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/client/client.go

@@ -0,0 +1,132 @@
+package client
+
+import (
+	"bytes"
+	"context"
+	"crypto/tls"
+	"crypto/x509"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
+	"os"
+	"strings"
+	"time"
+
+	"keywarden/agent/internal/config"
+)
+
+const defaultTimeout = 15 * time.Second
+
+type Client struct {
+	baseURL string
+	http    *http.Client
+}
+
+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)
+	}
+	caData, err := os.ReadFile(cfg.CACertPath())
+	if err != nil {
+		return nil, fmt.Errorf("read ca cert: %w", err)
+	}
+	caPool := x509.NewCertPool()
+	if !caPool.AppendCertsFromPEM(caData) {
+		return nil, errors.New("parse 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,
+	}
+
+	return &Client{baseURL: baseURL, http: httpClient}, nil
+}
+
+type EnrollRequest struct {
+	Token   string `json:"token"`
+	CSRPEM  string `json:"csr_pem"`
+	Host    string `json:"host"`
+	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"`
+}
+
+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, serverID string) error {
+	_ = ctx
+	_ = serverID
+	// TODO: call API to fetch account policy + approved access list.
+	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 fmt.Errorf("log batch failed: status %s", resp.Status)
+	}
+	return nil
+}

agent/internal/config/config.go

@@ -0,0 +1,148 @@
+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"`
+	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}
+		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)
+	}
+	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/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/servers/admin.py

@@ -1,17 +1,27 @@
 from django.contrib import admin
-from guardian.admin import GuardedModelAdmin
 from django.utils.html import format_html
-from .models import Server
+from guardian.admin import GuardedModelAdmin
+
+from .models import AgentCertificateAuthority, EnrollmentToken, Server
 
 
 @admin.register(Server)
 class ServerAdmin(GuardedModelAdmin):
-    list_display = ("avatar", "display_name", "hostname", "ipv4", "ipv6", "created_at")
+    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")
+    readonly_fields = ("created_at", "updated_at", "agent_enrolled_at")
-    fields = ("display_name", "hostname", "ipv4", "ipv6", "image", "created_at", "updated_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 +37,52 @@ class ServerAdmin(GuardedModelAdmin):
         )
     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 = ("fingerprint", "serial", "created_at", "revoked_at", "created_by")
+    fields = (
+        "name",
+        "is_active",
+        "cert_pem",
+        "key_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/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/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 +25,9 @@ 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)
     created_at = models.DateTimeField(auto_now_add=True)
     updated_at = models.DateTimeField(auto_now=True)
 
@@ -41,3 +52,108 @@ 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")

app/keywarden/api/routers/access.py

@@ -70,7 +70,14 @@ def build_router() -> Router:
 
     @router.get("/", response=List[AccessRequestOut])
     def list_requests(request: HttpRequest, filters: AccessQuery = Query(...)):
-        """List access requests for the user, or all if admin/operator."""
+        """List access requests with pagination and filters.
+
+        Auth: required.
+        Permissions:
+        - If user has global `access.view_accessrequest`, returns all requests.
+        - Otherwise, returns only objects with `access.view_accessrequest` object permission.
+        Filters: status, server_id, requester_id (requester_id is honored only with global view).
+        """
         require_authenticated(request)
         user = request.user
         if _has_global_perm(request, "access.view_accessrequest"):
@@ -94,7 +101,12 @@ def build_router() -> Router:
 
     @router.post("/", response=AccessRequestOut)
     def create_request(request: HttpRequest, payload: AccessRequestCreateIn):
-        """Create a new access request for a server."""
+        """Create a new access request for the current user.
+
+        Auth: required.
+        Permissions: requires global `access.add_accessrequest`.
+        Side effects: grants owner object perms on the new request.
+        """
         require_authenticated(request)
         if not request.user.has_perm("access.add_accessrequest"):
             raise HttpError(403, "Forbidden")
@@ -116,7 +128,11 @@ def build_router() -> Router:
 
     @router.get("/{request_id}", response=AccessRequestOut)
     def get_request(request: HttpRequest, request_id: int):
-        """Get an access request if permitted."""
+        """Get a single access request by id.
+
+        Auth: required.
+        Permissions: requires `access.view_accessrequest` on the object.
+        """
         require_authenticated(request)
         try:
             access_request = AccessRequest.objects.get(id=request_id)
@@ -128,7 +144,15 @@ def build_router() -> Router:
 
     @router.patch("/{request_id}", response=AccessRequestOut)
     def update_request(request: HttpRequest, request_id: int, payload: AccessRequestUpdateIn):
-        """Update request status or expiry (admin/operator or owner with restrictions)."""
+        """Update request status or expiry.
+
+        Auth: required.
+        Permissions: requires `access.change_accessrequest` on the object.
+        Rules:
+        - Admin/operator (global change) can set status to approved/denied/revoked/cancelled and
+          update expires_at.
+        - Non-admin can only set status to cancelled, and only while pending.
+        """
         require_authenticated(request)
         try:
             access_request = AccessRequest.objects.get(id=request_id)
@@ -171,7 +195,11 @@ def build_router() -> Router:
 
     @router.delete("/{request_id}", response={204: None})
     def delete_request(request: HttpRequest, request_id: int):
-        """Delete an access request if permitted."""
+        """Delete an access request.
+
+        Auth: required.
+        Permissions: requires `access.delete_accessrequest` on the object.
+        """
         require_authenticated(request)
         try:
             access_request = AccessRequest.objects.get(id=request_id)

app/keywarden/api/routers/agent.py

@@ -1,7 +1,13 @@
 from __future__ import annotations
 
+from datetime import datetime, timedelta
 from typing import List, Optional
 
+from cryptography import x509
+from cryptography.hazmat.primitives import hashes, serialization
+from cryptography.x509.oid import ExtendedKeyUsageOID, NameOID
+from django.conf import settings
+from django.core.exceptions import ValidationError
 from django.db import models
 from django.http import HttpRequest
 from django.utils import timezone
@@ -12,7 +18,7 @@ from pydantic import Field
 from apps.core.rbac import require_perms
 from apps.access.models import AccessRequest
 from apps.keys.models import SSHKey
-from apps.servers.models import Server
+from apps.servers.models import AgentCertificateAuthority, EnrollmentToken, Server, hostname_validator
 from apps.telemetry.models import TelemetryEvent
 
 
@@ -35,9 +41,82 @@ class SyncReportOut(Schema):
     status: str
 
 
+class AgentEnrollIn(Schema):
+    token: str
+    csr_pem: str
+    host: Optional[str] = None
+
+
+class AgentEnrollOut(Schema):
+    server_id: str
+    client_cert_pem: str
+    ca_cert_pem: str
+
+
+class LogEventIn(Schema):
+    timestamp: str
+    category: str
+    event_type: str
+    unit: Optional[str] = None
+    priority: Optional[str] = None
+    hostname: Optional[str] = None
+    username: Optional[str] = None
+    principal: Optional[str] = None
+    source_ip: Optional[str] = None
+    session_id: Optional[str] = None
+    message: Optional[str] = None
+    raw: Optional[str] = None
+    fields: Optional[dict] = None
+
+
+class LogIngestOut(Schema):
+    status: str
+    accepted: int
+
+
 def build_router() -> Router:
     router = Router()
 
+    @router.post("/enroll", response=AgentEnrollOut, auth=None)
+    def enroll_agent(request: HttpRequest, payload: AgentEnrollIn):
+        """Enroll a server agent using a one-time token."""
+        token_value = (payload.token or "").strip()
+        if not token_value:
+            raise HttpError(422, "Token required")
+        try:
+            token = EnrollmentToken.objects.get(token=token_value)
+        except EnrollmentToken.DoesNotExist:
+            raise HttpError(403, "Invalid token")
+        if not token.is_valid():
+            raise HttpError(403, "Token expired or already used")
+
+        host = (payload.host or "").strip()[:253]
+        display_name = host or "server"
+        hostname = None
+        if host:
+            try:
+                hostname_validator(host)
+                hostname = host
+            except ValidationError:
+                hostname = None
+
+        server = Server.objects.create(display_name=display_name, hostname=hostname)
+        token.mark_used(server)
+        token.save(update_fields=["used_at", "server"])
+
+        csr = _load_csr((payload.csr_pem or "").strip())
+        cert_pem, ca_pem, fingerprint, serial = _issue_client_cert(csr, host, server.id)
+        server.agent_enrolled_at = timezone.now()
+        server.agent_cert_fingerprint = fingerprint
+        server.agent_cert_serial = serial
+        server.save(update_fields=["agent_enrolled_at", "agent_cert_fingerprint", "agent_cert_serial"])
+
+        return AgentEnrollOut(
+            server_id=str(server.id),
+            client_cert_pem=cert_pem,
+            ca_cert_pem=ca_pem,
+        )
+
     @router.get("/servers/{server_id}/authorized-keys", response=List[AuthorizedKeyOut])
     def authorized_keys(request: HttpRequest, server_id: int):
         """Return authorized public keys for a server (admin or operator)."""
@@ -96,7 +175,75 @@ def build_router() -> Router:
         )
         return SyncReportOut(status="ok")
 
+    @router.post("/servers/{server_id}/logs", response=LogIngestOut, auth=None)
+    def ingest_logs(request: HttpRequest, server_id: int, payload: List[LogEventIn]):
+        """Accept log batches from agents (mTLS required at the edge)."""
+        try:
+            Server.objects.get(id=server_id)
+        except Server.DoesNotExist:
+            raise HttpError(404, "Server not found")
+        # TODO: enqueue to Valkey and persist to SQLite slices.
+        return LogIngestOut(status="accepted", accepted=len(payload))
+
     return router
 
 
+def _load_agent_ca() -> tuple[x509.Certificate, object, str]:
+    ca = (
+        AgentCertificateAuthority.objects.filter(is_active=True, revoked_at__isnull=True)
+        .order_by("-created_at")
+        .first()
+    )
+    if not ca:
+        raise HttpError(500, "Agent CA not configured")
+    try:
+        ca_cert = x509.load_pem_x509_certificate(ca.cert_pem.encode("utf-8"))
+        ca_key = serialization.load_pem_private_key(ca.key_pem.encode("utf-8"), password=None)
+    except (ValueError, TypeError):
+        raise HttpError(500, "Invalid agent CA material")
+    return ca_cert, ca_key, ca.cert_pem
+
+
+def _load_csr(csr_pem: str) -> x509.CertificateSigningRequest:
+    try:
+        csr = x509.load_pem_x509_csr(csr_pem.encode("utf-8"))
+    except ValueError:
+        raise HttpError(422, "Invalid CSR")
+    if not csr.is_signature_valid:
+        raise HttpError(422, "Invalid CSR signature")
+    return csr
+
+
+def _issue_client_cert(
+    csr: x509.CertificateSigningRequest, host: str | None, server_id: int
+) -> tuple[str, str, str, str]:
+    ca_cert, ca_key, ca_pem = _load_agent_ca()
+    now = datetime.utcnow()
+    subject = csr.subject
+    if len(subject) == 0:
+        subject = x509.Name([x509.NameAttribute(NameOID.COMMON_NAME, f"keywarden-agent-{server_id}")])
+    builder = (
+        x509.CertificateBuilder()
+        .subject_name(subject)
+        .issuer_name(ca_cert.subject)
+        .public_key(csr.public_key())
+        .serial_number(x509.random_serial_number())
+        .not_valid_before(now - timedelta(minutes=5))
+        .not_valid_after(now + timedelta(days=settings.KEYWARDEN_AGENT_CERT_VALIDITY_DAYS))
+        .add_extension(x509.BasicConstraints(ca=False, path_length=None), critical=True)
+        .add_extension(x509.ExtendedKeyUsage([ExtendedKeyUsageOID.CLIENT_AUTH]), critical=False)
+    )
+    if host:
+        try:
+            hostname_validator(host)
+            builder = builder.add_extension(x509.SubjectAlternativeName([x509.DNSName(host)]), critical=False)
+        except ValidationError:
+            pass
+    cert = builder.sign(private_key=ca_key, algorithm=hashes.SHA256())
+    cert_pem = cert.public_bytes(serialization.Encoding.PEM).decode("utf-8")
+    fingerprint = cert.fingerprint(hashes.SHA256()).hex()
+    serial = format(cert.serial_number, "x")
+    return cert_pem, ca_pem, fingerprint, serial
+
+
 router = build_router()

app/keywarden/api/routers/keys.py

@@ -69,7 +69,14 @@ def build_router() -> Router:
 
     @router.get("/", response=List[KeyOut])
     def list_keys(request: HttpRequest, filters: KeysQuery = Query(...)):
-        """List SSH keys for the current user, or any user if admin/operator."""
+        """List SSH keys with pagination and filters.
+
+        Auth: required.
+        Permissions:
+        - If user has global `keys.view_sshkey`, returns all keys.
+        - Otherwise, returns only objects with `keys.view_sshkey` object permission.
+        Filter: user_id (honored only with global view).
+        """
         require_authenticated(request)
         user = request.user
         if _has_global_perm(request, "keys.view_sshkey"):
@@ -89,7 +96,15 @@ def build_router() -> Router:
 
     @router.post("/", response=KeyOut)
     def create_key(request: HttpRequest, payload: KeyCreateIn):
-        """Create an SSH public key for the current user (admin/operator can specify user_id)."""
+        """Create an SSH public key.
+
+        Auth: required.
+        Permissions: requires global `keys.add_sshkey`.
+        Rules:
+        - Default owner is the current user.
+        - If caller has global `keys.add_sshkey` and `keys.view_sshkey`, they may specify user_id.
+        Side effects: grants owner object perms on the new key.
+        """
         require_authenticated(request)
         if not request.user.has_perm("keys.add_sshkey"):
             raise HttpError(403, "Forbidden")
@@ -121,7 +136,11 @@ def build_router() -> Router:
 
     @router.get("/{key_id}", response=KeyOut)
     def get_key(request: HttpRequest, key_id: int):
-        """Get a specific SSH key if permitted."""
+        """Get a specific SSH key by id.
+
+        Auth: required.
+        Permissions: requires `keys.view_sshkey` on the object.
+        """
         require_authenticated(request)
         try:
             key = SSHKey.objects.get(id=key_id)
@@ -133,7 +152,11 @@ def build_router() -> Router:
 
     @router.patch("/{key_id}", response=KeyOut)
     def update_key(request: HttpRequest, key_id: int, payload: KeyUpdateIn):
-        """Update key name or active state if permitted."""
+        """Update key name or active state.
+
+        Auth: required.
+        Permissions: requires `keys.change_sshkey` on the object.
+        """
         require_authenticated(request)
         try:
             key = SSHKey.objects.get(id=key_id)
@@ -159,7 +182,12 @@ def build_router() -> Router:
 
     @router.delete("/{key_id}", response={204: None})
     def delete_key(request: HttpRequest, key_id: int):
-        """Revoke an SSH key if permitted (soft delete)."""
+        """Revoke (soft delete) an SSH key.
+
+        Auth: required.
+        Permissions: requires `keys.delete_sshkey` on the object.
+        Behavior: sets is_active false and revoked_at if key is active.
+        """
         require_authenticated(request)
         try:
             key = SSHKey.objects.get(id=key_id)

app/keywarden/api/routers/servers.py

@@ -78,21 +78,7 @@ def build_router() -> Router:
     def create_server_json(request: HttpRequest, payload: ServerCreate):
         """Create a server using JSON payload (admin only)."""
         require_perms(request, "servers.add_server")
-        server = Server.objects.create(
+        raise HttpError(403, "Servers are created via agent enrollment tokens.")
-            display_name=payload.display_name.strip(),
-            hostname=(payload.hostname or "").strip() or None,
-            ipv4=(payload.ipv4 or "").strip() or None,
-            ipv6=(payload.ipv6 or "").strip() or None,
-        )
-        return {
-            "id": server.id,
-            "display_name": server.display_name,
-            "hostname": server.hostname,
-            "ipv4": server.ipv4,
-            "ipv6": server.ipv6,
-            "image_url": server.image_url,
-            "initial": server.initial,
-        }
 
     @router.post("/upload", response=ServerOut)
     def create_server_multipart(
@@ -105,24 +91,7 @@ def build_router() -> Router:
     ):
         """Create a server with optional image upload (admin only)."""
         require_perms(request, "servers.add_server")
-        server = Server(
+        raise HttpError(403, "Servers are created via agent enrollment tokens.")
-            display_name=display_name.strip(),
-            hostname=(hostname or "").strip() or None,
-            ipv4=(ipv4 or "").strip() or None,
-            ipv6=(ipv6 or "").strip() or None,
-        )
-        if image:
-            server.image.save(image.name, image)  # type: ignore[arg-type]
-        server.save()
-        return {
-            "id": server.id,
-            "display_name": server.display_name,
-            "hostname": server.hostname,
-            "ipv4": server.ipv4,
-            "ipv6": server.ipv6,
-            "image_url": server.image_url,
-            "initial": server.initial,
-        }
 
     @router.patch("/{server_id}", response=ServerOut)
     def update_server(request: HttpRequest, server_id: int, payload: ServerUpdate):

app/keywarden/settings/base.py

@@ -94,6 +94,8 @@ CACHES = {
 SESSION_ENGINE = "django.contrib.sessions.backends.cache"
 SESSION_CACHE_ALIAS = "default"
 
+KEYWARDEN_AGENT_CERT_VALIDITY_DAYS = int(os.getenv("KEYWARDEN_AGENT_CERT_VALIDITY_DAYS", "90"))
+
 PASSWORD_HASHERS = [
     "django.contrib.auth.hashers.Argon2PasswordHasher",
     "django.contrib.auth.hashers.PBKDF2PasswordHasher",