stacks-auth

name	stacks-auth
description	Use when implementing authentication, authorization, passkeys, TOTP/2FA, RBAC, gates, policies, session auth, token management, email verification, password resets, or rate limiting in a Stacks application. Covers the @stacksjs/auth package, config/auth.ts, app/Gates.ts, and app/Middleware/.
license	MIT
compatibility	Bun >= 1.3.0, TypeScript
allowed-tools	Read Edit Write Bash Grep Glob

Stacks Authentication & Authorization

The @stacksjs/auth package provides comprehensive authentication and authorization for Stacks applications, built on @stacksjs/ts-auth.

Key Paths

• Core package source: storage/framework/core/auth/src/
• Configuration: config/auth.ts
• Security config: config/security.ts
• Hashing config: config/hashing.ts
• Application gates: app/Gates.ts
• Application middleware: app/Middleware/
• Middleware aliases: app/Middleware.ts
• Auth types: storage/framework/core/types/src/auth.ts

Source Files

auth/src/
├── index.ts              # All re-exports
├── authentication.ts     # Auth class - core auth logic
├── authenticator.ts      # 2FA and personal access client
├── client.ts             # Client re-exports
├── middleware.ts          # Auth middleware handler
├── rate-limiter.ts        # RateLimiter class (5 attempts, 15min lockout)
├── passkey.ts             # WebAuthn/Passkey support
├── password/reset.ts      # Password reset flow
├── register.ts            # User registration
├── user.ts                # Auth user helpers
├── tokens.ts              # Token CRUD, scopes, refresh tokens, OAuth clients
├── gate.ts                # Authorization gates & policies
├── policy.ts              # BasePolicy class + discovery
├── authorizable.ts        # User authorization mixin
├── rbac.ts                # Full RBAC system
├── email-verification.ts  # Email verification flow
└── session-auth.ts        # Session-based SPA auth

Auth Class (authentication.ts) — Static Methods

Login & Authentication

• Auth.attempt(credentials: AuthCredentials): Promise<boolean> — validate credentials without creating token
• Auth.validate(credentials: AuthCredentials): Promise<boolean> — alias for attempt
• Auth.login(credentials: AuthCredentials, options?: TokenCreateOptions): Promise<{ user, token } | null> — login and create token
• Auth.loginUsingId(userId: number, options?: TokenCreateOptions): Promise<{ user, token } | null> — login by user ID
• Auth.logout(): Promise<void> — revoke current token
• Auth.once(credentials: AuthCredentials): Promise<boolean> — one-time auth without token
• Auth.requestToken(credentials, clientId, clientSecret): Promise<{ token } | null> — OAuth token request

User State

• Auth.user(): Promise<UserModel | undefined> — get authenticated user from bearer token
• Auth.check(): Promise<boolean> — is user authenticated?
• Auth.guest(): Promise<boolean> — is user a guest?
• Auth.id(): Promise<number | undefined> — get authenticated user ID
• Auth.setUser(user: UserModel): void — manually set user

Token Creation

• Auth.createTokenForUser(user, options?: TokenCreateOptions): Promise<NewAccessToken>
• Auth.createToken(user, name?, abilities?): Promise<AuthToken>

Token Validation

• Auth.validateToken(token: string): Promise<boolean> — validate bearer token
• Auth.getUserFromToken(token: string): Promise<UserModel | undefined>
• Auth.currentAccessToken(): Promise<PersonalAccessToken | undefined>

Token Abilities (Scopes)

• Auth.tokenCan(ability: string): Promise<boolean>
• Auth.tokenCant(ability: string): Promise<boolean>
• Auth.tokenAbilities(): Promise<string[]>
• Auth.tokenCanAll(abilities: string[]): Promise<boolean>
• Auth.tokenCanAny(abilities: string[]): Promise<boolean>

Token Management

• Auth.tokens(userId?: number): Promise<PersonalAccessToken[]>
• Auth.revokeToken(token: string): Promise<void>
• Auth.revokeTokenById(tokenId: number): Promise<void>
• Auth.revokeAllTokens(userId?: number): Promise<void>
• Auth.revokeOtherTokens(userId?: number): Promise<void>
• Auth.pruneExpiredTokens(): Promise<number>
• Auth.pruneRevokedTokens(): Promise<number>
• Auth.rotateToken(oldToken: string): Promise<AuthToken | null>
• Auth.findToken(tokenId: number): Promise<PersonalAccessToken | null>

Utility

• Auth.guard(name?: string): typeof Auth — select guard (returns self)
• Auth.viaRemember(): boolean — always false currently
• Auth.clearState(): void — clear cached user/token

Token System (tokens.ts)

Access Tokens

• tokens(userId: number): Promise<AccessToken[]>
• findToken(plainTextToken: string): Promise<AccessToken | null>
• currentAccessToken(): Promise<AccessToken | null>
• createToken(userId, name?, scopes?, options?): Promise<PersonalAccessTokenResult>
  • Options: { expiresInMinutes?, withRefreshToken?, refreshExpiresInDays? }

Refresh Tokens

• refreshToken(refreshTokenPlain, options?): Promise<RefreshTokenResult>
• validateRefreshToken(refreshTokenPlain): Promise<boolean>
• revokeRefreshToken(refreshTokenPlain): Promise<void>
• revokeAllRefreshTokens(userId): Promise<void>
• deleteExpiredRefreshTokens(): Promise<number>
• deleteRevokedRefreshTokens(daysOld?): Promise<number>

Token Revocation

• revokeToken(plainTextToken): Promise<void>
• revokeTokenById(tokenId): Promise<void>
• revokeAllTokens(userId): Promise<void>
• revokeOtherTokens(userId): Promise<void>
• deleteExpiredTokens(): Promise<number>
• deleteRevokedTokens(daysOld?): Promise<number>

Token Scopes

• tokenCan(scope): Promise<boolean>
• tokenCant(scope): Promise<boolean>
• tokenCanAll(scopes): Promise<boolean>
• tokenCanAny(scopes): Promise<boolean>
• tokenAbilities(): Promise<string[]>
• parseScopes(scopes: string | string[] | null | undefined): TokenScopes

OAuth Clients

• clients(userId): Promise<OAuthClient[]>
• findClient(clientId): Promise<OAuthClient | null>
• createClient(options: CreateClientOptions): Promise<CreateClientResult>
• revokeClient(clientId): Promise<void>

Two-Factor Authentication (authenticator.ts)

• generateTwoFactorSecret(): string
• generateTwoFactorToken(secret: Secret): Promise<Token>
• verifyTwoFactorCode(token: Token, secret: Secret): Promise<boolean>
• generateTwoFactorUri(user?, service?, secret?): string
• createPersonalAccessClient(): Promise<Result<string, never>>

Re-exported from @stacksjs/ts-auth

• generateTOTP, verifyTOTP, generateTOTPSecret, totpKeyUri

Authorization Gates (gate.ts)

Gate Functions

• define<T>(ability: string, callback: GateCallback<T>): void
• policy(model: string | { name }, policyClass: new () => Policy): void
• before(callback): void — run before any gate check
• after(callback): void — run after any gate check
• allows(ability, user, ...args): Promise<boolean>
• denies(ability, user, ...args): Promise<boolean>
• can(ability, user, ...args): Promise<boolean>
• cannot(ability, user, ...args): Promise<boolean>
• any(abilities[], user, ...args): Promise<boolean>
• all(abilities[], user, ...args): Promise<boolean>
• none(abilities[], user, ...args): Promise<boolean>
• authorize(ability, user, ...args): Promise<AuthorizationResponse> — throws on deny
• inspect(ability, user, ...args): Promise<AuthorizationResponse> — never throws
• has(ability): boolean
• hasPolicy(model): boolean
• abilities(): string[]
• getPolicyFor<T>(model: T): Policy<T> | null
• flush(): void — clear all gates

Gate Facade — Gate.define(), Gate.can(), etc

AuthorizationResponse Class

• static allow(message?): AuthorizationResponse
• static deny(message?, code?): AuthorizationResponse
• allowed(): boolean, denied(): boolean
• authorize(): void — throws AuthorizationException if denied

Policy Interface

Methods: before?, viewAny?, view?, create?, update?, delete?, restore?, forceDelete?

BasePolicy Abstract Class

Protected helpers: allow(message?), deny(message?, code?), denyIf(condition), denyUnless(condition), allowIf(condition)

RBAC System (rbac.ts)

Role Management

• Rbac.createRole(name, guardName?, description?): Promise<RoleRecord>
• Rbac.findRole(name, guardName?): Promise<RoleRecord | null>
• Rbac.deleteRole(name, guardName?): Promise<void>
• Rbac.getAllRoles(guardName?): Promise<RoleRecord[]>

Permission Management

• Rbac.createPermission(name, guardName?, description?): Promise<PermissionRecord>
• Rbac.findPermission(name, guardName?): Promise<PermissionRecord | null>
• Rbac.deletePermission(name, guardName?): Promise<void>
• Rbac.getAllPermissions(guardName?): Promise<PermissionRecord[]>

User-Role Operations

• Rbac.getUserRoles(user): Promise<RoleRecord[]>
• Rbac.assignRole(user, roleName, guardName?): Promise<void>
• Rbac.removeRole(user, roleName, guardName?): Promise<void>
• Rbac.removeAllRoles(user): Promise<void>
• Rbac.syncRoles(user, roleNames[], guardName?): Promise<void> - replaces assignments for that guard and preserves roles from other guards
• Rbac.hasRole(user, roleName, guardName?): Promise<boolean>
• Rbac.hasAnyRole(user, roleNames[], guardName?): Promise<boolean>
• Rbac.hasAllRoles(user, roleNames[], guardName?): Promise<boolean>

User-Permission Operations

• Rbac.getUserPermissions(user): Promise<PermissionRecord[]>
• Rbac.givePermission(user, permissionName, guardName?): Promise<void>
• Rbac.revokePermission(user, permissionName, guardName?): Promise<void>
• Rbac.revokeAllPermissions(user): Promise<void>
• Rbac.syncPermissions(user, permissionNames[], guardName?): Promise<void>
• Rbac.hasPermission(user, permissionName, guardName?): Promise<boolean>
• Rbac.hasAnyPermission(user, permissionNames[], guardName?): Promise<boolean>
• Rbac.hasAllPermissions(user, permissionNames[], guardName?): Promise<boolean>

Role-Permission Operations

• Rbac.getRolePermissions(roleId): Promise<PermissionRecord[]>
• Rbac.givePermissionToRole(roleName, permissionName, guardName?): Promise<void>
• Rbac.revokePermissionFromRole(roleName, permissionName, guardName?): Promise<void>
• Rbac.syncRolePermissions(roleName, permissionNames[], guardName?): Promise<void>

withRbac Mixin

withRbac(user) — adds hasRole(), hasPermission(), assignRole(), givePermission(), etc. to any user object

RBAC Types

interface RoleRecord { id, name, guard_name, description?, created_at?, updated_at? }
interface PermissionRecord { id, name, guard_name, description?, created_at?, updated_at? }
interface RbacStore { findRoleByName, createRole, deleteRole, getAllRoles, findPermissionByName, createPermission, ... }

Session Auth (session-auth.ts)

• SessionAuth.login(email, password): Promise<{ user, sessionId }>
• SessionAuth.logout(sessionId): void
• SessionAuth.user(sessionId): Promise<UserModel | undefined>
• SessionAuth.check(sessionId): boolean
• SessionAuth.refresh(sessionId, ttlMs?): boolean

Internal: in-memory Map with 10k session limit, 5-minute eviction interval, timing-safe password comparison with dummy bcrypt hash.

Email Verification (email-verification.ts)

• EmailVerification.isVerified(user): boolean
• EmailVerification.send(user): Promise<void>
• EmailVerification.verify(userId, token): Promise<EmailVerificationResult>
• EmailVerification.resend(user): Promise<EmailVerificationResult>

Password Reset (password/reset.ts)

const actions = passwordResets(email)
await actions.sendEmail()
const valid = await actions.verifyToken(token)
const result = await actions.resetPassword(token, newPassword)

Registration (register.ts)

• register(credentials: NewUser): Promise<{ token: AuthToken }>

User Helpers (user.ts)

• authUser(): Promise<UserModel | undefined>
• check(): Promise<boolean>
• id(): Promise<number | undefined>
• email(): Promise<string | undefined>
• name(): Promise<string | undefined>
• isAuthenticated(): Promise<boolean>
• logout(): Promise<void>
• refresh(): Promise<void>

Passkey/WebAuthn (passkey.ts)

• getUserPasskeys(userId): Promise<PasskeyAttribute[]>
• getUserPasskey(userId, passkeyId): Promise<PasskeyAttribute | undefined>
• setCurrentRegistrationOptions(user, verified): Promise<void>

Re-exported from @stacksjs/ts-auth

• generateRegistrationOptions, generateAuthenticationOptions
• verifyRegistrationResponse, verifyAuthenticationResponse
• startRegistration, startAuthentication (browser)
• browserSupportsWebAuthn, browserSupportsWebAuthnAutofill
• platformAuthenticatorIsAvailable

Auth Middleware (middleware.ts)

export const authMiddlewareHandler = {
  name: 'auth',
  handle: authMiddleware, // validates bearer token, throws 401
}

Rate Limiter (rate-limiter.ts)

class RateLimiter {
  static MAX_ATTEMPTS = 5
  static LOCKOUT_DURATION = 15 * 60 * 1000  // 15 minutes
  static MAX_STORE_SIZE = 10_000
  static EVICTION_INTERVAL = 5 * 60 * 1000  // 5 minutes

  static isRateLimited(email): boolean
  static recordFailedAttempt(email): void
  static resetAttempts(email): void
  static validateAttempt(email): void  // throws HttpError 429
}

Authorizable Mixin (authorizable.ts)

const authUser = withAuthorization(user)
await authUser.can('edit-post', post)
await authUser.cannot('delete-post', post)
await authUser.canAny(['edit', 'delete'], post)
await authUser.canAll(['edit', 'publish'], post)
await authUser.authorize('edit-post', post)  // throws if denied

Configuration

config/auth.ts

{
  default: 'api',
  guards: { api: { driver: 'token', provider: 'users' } },
  providers: { users: { driver: 'database', table: 'users' } },
  username: 'email',      // AUTH_USERNAME_FIELD env
  password: 'password',   // AUTH_PASSWORD_FIELD env
  tokenExpiry: 30,         // days, AUTH_TOKEN_EXPIRY env
  tokenRotation: 7,        // days, AUTH_TOKEN_ROTATION env
  defaultAbilities: ['*'],
  defaultTokenName: 'auth_token',
  passwordReset: { expire: 60, throttle: 60 }
}

config/hashing.ts

{
  driver: 'bcrypt',         // 'bcrypt' | 'argon2'
  bcrypt: { rounds: 12 },
  argon2: { memory: 65536, time: 3 }
}

config/security.ts

{
  firewall: {
    enabled: true,
    countryCodes: [],
    ipAddresses: { allowlist: [], blocklist: [] },
    rateLimitPerMinute: 500,
    useIpReputationLists: true,
    useKnownBadInputsRuleSet: true
  }
}

Middleware Aliases (app/Middleware.ts)

Available middleware names: maintenance, auth, guest, api, team, logger, abilities, can, throttle, local, development, staging, production, env.local, env.development, env.staging, env.production, role, permission, verified (EnsureEmailIsVerified)

Application Gates Example (app/Gates.ts)

Gate.define('access-admin', (user) => user?.email?.endsWith('@stacksjs.org') ?? false)
Gate.define('edit-settings', (user) => !!user)
Gate.define('view-dashboard', (user) => !!user)

Default API Routes

• POST /login → LoginAction (validates email + password)
• POST /register → RegisterAction
• POST /auth/refresh → RefreshTokenAction
• POST /auth/token → CreateTokenAction
• GET /auth/tokens → ListTokensAction (auth middleware)
• DELETE /auth/tokens/{id} → RevokeTokenAction (auth middleware)
• GET /me → GetMeAction (auth middleware)
• POST /logout → LogoutAction (auth middleware)

User Model Traits

// User model uses:
traits: {
  useAuth: { usePasskey: true },
  useUuid: true,
  useTimestamps: true,
  useSocials: ['github'],
}

Gotchas

• Auth depends on @stacksjs/ts-auth for TOTP and passkey functions
• Password hashing defaults to bcrypt with 12 rounds (config/hashing.ts)
• Rate limiter uses in-memory Map, resets on server restart — not shared across workers
• Session auth also uses in-memory Map with 10k limit — for SPA cookie auth
• Token format is tokenId|plainText — the | separates the encrypted ID from the plain token
• The parseToken() helper splits on | to extract both parts
• Bearer tokens come from the Authorization: Bearer <token> header
• Auth.user() internally calls getBearerToken() → parseToken() → getTokenFromId() → validates hash
• RBAC has an internal cache (userRoles, userPermissions, rolePermissions) — call Rbac.flushCache() after direct DB changes
• syncRoles() and syncPermissions() are guard-scoped replacements: they preserve assignments belonging to other guards
• Gate before callbacks can short-circuit — return true to allow, null to continue checking
• withRbac() and withAuthorization() return new objects with methods mixed in
• The RbacStore interface must be implemented and set via Rbac.setStore() for RBAC to work
• Password reset tokens expire after 60 minutes by default
• Default token abilities are ['*'] — wildcard access
• Token expiry defaults to 30 days
• Session auth uses timing-safe bcrypt comparison even for failed lookups (dummy hash prevents timing attacks)

Build

cd storage/framework/core/auth && bun build.ts