feat: personal access tokens with scoped bearer auth

Add cnp_ personal access tokens so the CLI, MCP server, and external agents authenticate without a browser session — the agent-first spine from ROADMAP2 phase A. Modeled on agent_auth_tokens: raw token shown once, only SHA-256 hash stored. - user_tokens table (goose migration + sqlc), name/prefix/scope/expiry, owner-scoped revoke, last_used_at stamping - middleware: cnp_ bearer resolution, read scope gates mutations with 403 SCOPE_INSUFFICIENT, non-admin scopes cap is_admin even for admin owners — a token never outranks its scope or its owner - GET/POST/DELETE /api/v1/user/tokens + OpenAPI + generated types - Settings UI: create with scope/expiry pickers, one-time token display with copy, list with last-used/expiry, confirm-revoke - docs: OPERATIONS.md section, README feature line Verified end-to-end against live Postgres: create/list/revoke, read scope blocks PUT (403), write PAT on admin owner blocked from admin routes (403), admin scope works, revoked token returns 401. Authored By: TDvorak <[email protected]>
2026-10-28 07:41:27 +00:00 · 2026-10-08 14:31:29 +02:00
1 parent f9ae5b962c
commit e881747388
@@ -0,0 +1,194 @@
+package api
+
+import (
+	"crypto/rand"
+	"crypto/sha256"
+	"database/sql"
+	"encoding/hex"
+	"net/http"
+	"strings"
+	"time"
+
+	"containr/internal/database"
+	sqlcdb "containr/internal/database/sqlcdb"
+
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+)
+
+// Personal access tokens let the CLI, MCP server, and third-party agents
+// authenticate without a browser session. The raw token (cnp_…) is
+// returned exactly once at creation; only its sha256 hash persists.
+
+var userTokenScopes = map[string]bool{"read": true, "write": true, "admin": true}
+
+func generateUserToken() (token string, prefix string, hash string, err error) {
+	buf := make([]byte, 24)
+	if _, err = rand.Read(buf); err != nil {
+		return "", "", "", err
+	}
+	token = "cnp_" + hex.EncodeToString(buf)
+	prefix = token[:12] // cnp_ + 8 hex chars, enough to identify in a list
+	sum := sha256.Sum256([]byte(token))
+	return token, prefix, hex.EncodeToString(sum[:]), nil
+}
+
+func userTokenJSON(t sqlcdb.UserToken) gin.H {
+	row := gin.H{
+		"id":         t.ID.String(),
+		"name":       t.Name,
+		"key_prefix": t.KeyPrefix,
+		"scope":      t.Scope,
+	}
+	if t.CreatedAt.Valid {
+		row["created_at"] = t.CreatedAt.Time
+	}
+	if t.LastUsedAt.Valid {
+		row["last_used_at"] = t.LastUsedAt.Time
+	}
+	if t.ExpiresAt.Valid {
+		row["expires_at"] = t.ExpiresAt.Time
+	}
+	return row
+}
+
+func handleCreateUserToken(c *gin.Context) {
+	userID, ok := requireAuthenticatedUserID(c)
+	if !ok {
+		return
+	}
+	db := c.MustGet("db").(*database.DB)
+	queries := sqlcdb.New(db.DB)
+
+	var req struct {
+		Name          string `json:"name"`
+		Scope         string `json:"scope"`
+		ExpiresInDays int    `json:"expires_in_days"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	req.Name = strings.TrimSpace(req.Name)
+	if req.Name == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "name is required"})
+		return
+	}
+	if req.Scope == "" {
+		req.Scope = "write"
+	}
+	if !userTokenScopes[req.Scope] {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "scope must be one of: read, write, admin"})
+		return
+	}
+	// A token can never outrank its owner: non-admin users cannot mint
+	// admin-scope tokens even for themselves.
+	if req.Scope == "admin" && !c.GetBool("is_admin") {
+		c.JSON(http.StatusForbidden, gin.H{"error": "admin scope requires a platform admin account"})
+		return
+	}
+	if req.ExpiresInDays < 0 || req.ExpiresInDays > 3650 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "expires_in_days must be between 0 (never) and 3650"})
+		return
+	}
+
+	token, prefix, hash, err := generateUserToken()
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to generate token"})
+		return
+	}
+
+	ownerUUID, err := uuid.Parse(userID)
+	if err != nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid user context"})
+		return
+	}
+
+	expiresAt := sql.NullTime{}
+	if req.ExpiresInDays > 0 {
+		expiresAt = sql.NullTime{Time: time.Now().Add(time.Duration(req.ExpiresInDays) * 24 * time.Hour), Valid: true}
+	}
+
+	row, err := queries.CreateUserToken(c.Request.Context(), sqlcdb.CreateUserTokenParams{
+		UserID:    ownerUUID,
+		Name:      req.Name,
+		KeyPrefix: prefix,
+		TokenHash: hash,
+		Scope:     req.Scope,
+		ExpiresAt: expiresAt,
+	})
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to store token"})
+		return
+	}
+
+	LogAudit(userID, "user_token", row.ID.String(), "create", map[string]interface{}{"name": req.Name, "scope": req.Scope})
+
+	payload := userTokenJSON(row)
+	payload["token"] = token
+	c.JSON(http.StatusCreated, payload)
+}
+
+func handleListUserTokens(c *gin.Context) {
+	userID, ok := requireAuthenticatedUserID(c)
+	if !ok {
+		return
+	}
+	db := c.MustGet("db").(*database.DB)
+	queries := sqlcdb.New(db.DB)
+
+	ownerUUID, err := uuid.Parse(userID)
+	if err != nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid user context"})
+		return
+	}
+
+	rows, err := queries.ListUserTokens(c.Request.Context(), ownerUUID)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to fetch tokens"})
+		return
+	}
+
+	out := make([]gin.H, 0, len(rows))
+	for _, t := range rows {
+		out = append(out, userTokenJSON(t))
+	}
+	c.JSON(http.StatusOK, gin.H{"tokens": out})
+}
+
+func handleDeleteUserToken(c *gin.Context) {
+	userID, ok := requireAuthenticatedUserID(c)
+	if !ok {
+		return
+	}
+	db := c.MustGet("db").(*database.DB)
+	queries := sqlcdb.New(db.DB)
+
+	ownerUUID, err := uuid.Parse(userID)
+	if err != nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid user context"})
+		return
+	}
+	tokenUUID, err := uuid.Parse(c.Param("id"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid token ID"})
+		return
+	}
+
+	affected, err := queries.RevokeUserToken(c.Request.Context(), sqlcdb.RevokeUserTokenParams{
+		ID:     tokenUUID,
+		UserID: ownerUUID,
+	})
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to revoke token"})
+		return
+	}
+	if affected == 0 {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Token not found"})
+		return
+	}
+
+	LogAudit(userID, "user_token", tokenUUID.String(), "revoke", nil)
+	c.JSON(http.StatusOK, gin.H{"message": "Token revoked"})
+}