Agach Identity System (internal/identity/)

Overview

Authentication, authorization, SSO, team management, and daemon node onboarding.

Domain Types

Core (domain/types.go)

• UserID, TeamID — UUID-based identifiers
• MemberRole — "admin" or "member"
• Team — ID, Name, Slug, Description, timestamps
• User — ID, Email, DisplayName, PasswordHash, SSOProvider, SSOSubject, Role, TeamID, timestamps
• Actor — UserID, Email, Role + IsAdmin() method (request-scoped auth context)
• DaemonActor — NodeID, OwnerUserID, Mode + IsZero() method

Nodes (domain/node.go)

• NodeID, OnboardingCodeID — UUID-based identifiers
• NodeMode — "default" or "shared"
• NodeStatus — "active" or "revoked"
• Node — ID, OwnerUserID, Name, Mode, Status, RefreshTokenHash, LastSeenAt, RevokedAt, timestamps
• OnboardingCode — ID, Code (6-digit), CreatedByUserID, NodeMode, NodeName, ExpiresAt, UsedAt, UsedByNodeID
• NodeAccess — ID, NodeID, UserID (nullable), TeamID (nullable)

SSO Config (domain/ssoconfig.go)

• SsoProvider — Name, Icon, SAML (nullable), OIDC (nullable)
• OIDCConfig — IssuerURL, ClientID, ClientSecret, RedirectURL, Scopes
• SAMLConfig — MetadataURL, EntityID, ACSURL, Certificate (not yet supported)

Token TTLs (domain/ttl.go)

• DefaultRefreshTokenTTL = 7 days
• DefaultRememberMeTokenTTL = 30 days
• DefaultDaemonJWTTTL = 30 days

Errors (domain/errors.go)

ErrUnauthorized, ErrForbidden, ErrUserNotFound, ErrInvalidCredentials, ErrEmailAlreadyExists, ErrSSOUserNoPassword, ErrTeamNotFound, ErrTeamSlugConflict, ErrSSOProviderNotFound, ErrSSONotSupported, ErrNodeNotFound, ErrNodeRevoked, ErrOnboardingCodeNotFound/Expired/Used

Repository Interfaces

• UserRepository — Create, FindByID, FindByEmail, FindBySSO, Update, ListAll, ListByTeam
• TeamRepository — Create, FindByID, FindBySlug, List, Update, Delete
• NodeRepository — Create, FindByID, ListByOwner, ListActiveByOwner, Update, UpdateLastSeen
• OnboardingCodeRepository — Create, FindByCode, MarkUsed (FOR UPDATE lock), DeleteExpired
• NodeAccessRepository — GrantUser/Team, RevokeUser/Team, ListByNode, HasAccess (ON CONFLICT DO NOTHING)

Service Interfaces

• AuthCommands — Register, Login, LoginSSO, RefreshToken, Logout, UpdateProfile, ChangePassword, RefreshDaemonToken
• AuthQueries — ValidateJWT, ValidateDaemonJWT, GetCurrentUser
• TeamCommands — CreateTeam, UpdateTeam, DeleteTeam, AddUserToTeam, RemoveUserFromTeam, SetUserRole
• TeamQueries — ListTeams, GetTeam, ListUsers, ListTeamMembers
• OnboardingCommands — GenerateCode, CompleteOnboarding
• NodeCommands — RevokeNode, UpdateNodeAccess, RenameNode
• NodeQueries — ListNodes, GetNode

App Layer

Auth (app/auth.go)

• bcrypt cost 12, min password 8 chars, min secret 32 bytes
• Access token TTL: 15 minutes
• Refresh token: 7 days (30 days with remember_me)
• JWT claims: sub, email, role, token_type, iat, exp
• Daemon JWT claims: sub (nodeID), owner_id, mode, token_type

SSO (app/sso.go)

• OIDC only (SAML not yet supported)
• Full flow: discovery → code exchange → JWK fetch → ID token validation
• RSA + ECDSA (P-256/P-384/P-521) key support
• Auto-creates user on first SSO login

Teams (app/teams.go)

• All mutations require actor.IsAdmin()

Onboarding (app/onboarding.go)

• 6-digit numeric codes with uniqueness retries (3 attempts)
• 15-minute code expiry
• Refresh token: 32 random bytes, bcrypt hashed (cost 12)

Nodes (app/nodes.go)

• All mutations require node ownership (node.OwnerUserID == actor.UserID)
• UpdateNodeAccess requires NodeModeShared

HTTP Routes

Auth (rate limited: 5 requests / 15 minutes per IP)

POST   /api/auth/register     — Register new user
POST   /api/auth/login        — Login (email/password, remember_me)
POST   /api/auth/refresh      — Refresh access token (refresh_token cookie)
POST   /api/auth/logout       — Clear refresh_token cookie
GET    /api/auth/me           — Get current user
PATCH  /api/auth/me           — Update display name
POST   /api/auth/me/password  — Change password

SSO

GET    /api/auth/sso/providers              — List configured providers
GET    /api/auth/sso/{provider}/authorize   — OIDC authorization initiation
GET    /api/auth/sso/{provider}/callback    — OIDC callback (returns #sso_token=...)

Teams

GET    /api/identity/teams           — List teams
POST   /api/identity/teams           — Create team (admin)
DELETE /api/identity/teams/{id}      — Delete team (admin)
GET    /api/identity/users           — List users (admins see emails)
PUT    /api/identity/users/{id}/team — Add user to team (admin)
DELETE /api/identity/users/{id}/team — Remove from team (admin)
PUT    /api/identity/users/{id}/role — Set user role (admin)

Onboarding & Nodes

POST   /api/onboarding/codes       — Generate onboarding code (auth required)
POST   /api/onboarding/complete    — Complete onboarding (unauthenticated)
POST   /api/daemon/refresh         — Refresh daemon token (unauthenticated)
GET    /api/nodes                  — List nodes (auth required)
GET    /api/nodes/{id}             — Get node (ownership required)
DELETE /api/nodes/{id}             — Revoke node (ownership required)
PATCH  /api/nodes/{id}/name        — Rename node
PUT    /api/nodes/{id}/access      — Update access grants (shared mode only)

Security

• Bcrypt password hashing (cost 12)
• HMAC-SHA256 JWT signing (≥ 32 byte secret)
• pgp_sym_encrypt for sensitive DB columns (password_hash, sso_subject)
• HttpOnly, Secure, SameSite=Strict cookies
• OIDC state verification with HMAC signatures
• Default admin seeded on first run: [email protected] / admin (env overridable)

Init Wiring (init.go)

1. Create repositories (runs migrations)
2. Create SSOService if providers configured
3. Wire auth service (with/without nodes)
4. Wire team, onboarding, node services
5. Seed default admin if no users exist
6. Return System struct with all services