# apps/api/src/auth
dir: apps/api/src/auth

index: apps/api/src/auth/.pi-map.index.md

## role
Provides authentication and authorization infrastructure for the API, including OIDC login, session management, and dependency injection for protected routes.
## files
- __init__.py | Exposes authentication utility functions as a public API through module-level imports | dep: src.auth.cookies, src.auth.oidc, src.auth.session
- cookies.py | Builds a dictionary of HTTP cookie options from application settings | exp: func:build_cookie_options(settings: Settings) → dict[str, str | bool | None] | dep: src.config, src.config.Settings
- dependencies.py | Provides FastAPI dependency injection functions for database sessions, user authentication, and project ownership verification. | exp: func:get_db_session(), call:SessionLocal, func:get_current_user_id(session_cookie) → uuid.UUID, call:Settings, call:decode_session_cookie, call:uuid.UUID, call:str, raise:HTTPException, func:get_current_user(session_cookie, db_session) → User, call:Settings, call:decode_session_cookie, call:uuid.UUID, call:str, call:db_session.get, raise:HTTPException, func:_get_user(session: AsyncSession, user_id: uuid.UUID) → User, call:session.get, raise:HTTPException, func:_get_owned_project(project_id: uuid.UUID, user_id: uuid.UUID, session: AsyncSession) → "Project", call:session.get, raise:HTTPException | dep: uuid, typing, fastapi, sqlalchemy.ext.asyncio, src.auth.session, src.config, src.database, src.models.project, src.models.user, sqlalchemy
- oidc.py | Implements OIDC authentication flow with Authentik for login redirect URL construction, authorization code exchange, and user info retrieval. | exp: func:build_login_redirect_url(settings: Settings, redirect_uri: str, state: str) → str, call:urlencode, func:exchange_code_for_tokens(settings: Settings, code: str, redirect_uri: str, client: httpx.AsyncClient) → dict[str, str], call:client.post, call:response.raise_for_status, call:response.json, call:payload.get, func:fetch_user_info(settings: Settings, access_token: str, client: httpx.AsyncClient) → dict[str, Any], call:client.get, call:response.raise_for_status, call:response.json | dep: typing, urllib.parse, httpx, src.config
- session.py | Creates and verifies signed JWT-like session cookies with HMAC-SHA256 signatures and expiration checks. | exp: func:_base64url_encode(data: bytes) → str, call:base64.urlsafe_b64encode(data).rstrip(b"=").decode, func:_base64url_decode(data: str) → bytes, call:len, call:base64.urlsafe_b64decode, func:create_session_cookie(settings: Settings, user_id: str) → str, call:int, call:(datetime.now(timezone.utc) + timedelta(hours=settings.session_ttl_hours)).timestamp, call:datetime.now, call:timedelta, call:_base64url_encode, call:json.dumps({"alg": "HS256", "typ": "session"}).encode, call:json.dumps(payload).encode, call:hmac.new( settings.session_secret.encode(), message.encode(), hashlib.sha256, ).digest, call:settings.session_secret.encode, call:message.encode, func:decode_session_cookie(settings: Settings, cookie_value: str) → dict[str, Any], call:cookie_value.split, call:len, call:hmac.new( settings.session_secret.encode(), message.encode(), hashlib.sha256, ).digest, call:settings.session_secret.encode, call:message.encode, call:_base64url_encode, call:hmac.compare_digest, call:_base64url_decode, call:json.loads, call:payload.get, call:int, call:datetime.now(timezone.utc).timestamp, raise:ValueError | dep: hmac, hashlib, json, base64, datetime, typing, src.config, src.config.Settings
## arch
Modular security layer using FastAPI dependency injection pattern, with separation of concerns across cookie handling, OIDC flow, session state, and reusable auth dependencies.
## tags
session, src, cookie, user, get, base64url, raise:httpexception, call:
## symbols
- build_cookie_options
- get_db_session
- get_current_user_id
- get_current_user
- _get_user
- _get_owned_project
- build_login_redirect_url
- exchange_code_for_tokens
## workflows
- change auth behavior
  read: __init__.py, cookies.py, dependencies.py
## dirty
-