Add user authentication system with API key management (#50)

- Add User, Session, AuthSettings models with bcrypt password hashing - Add auth endpoints: login, logout, change-password, me - Add API key CRUD: create (orch_xxx format), list, revoke - Add admin user management: list, create, update, reset-password - Create default admin user on startup (admin/admin) - Add frontend: Login page, API Keys page, Admin Users page - Add AuthContext for session state management - Add user menu to Layout header with login/logout/settings - Add 15 integration tests for auth system - Add migration 006_auth_tables.sql
2026-01-08 15:01:37 -06:00
parent 1cbd335443
commit 2a68708a79
20 changed files with 4690 additions and 19 deletions
--- a/backend/app/auth.py
+++ b/backend/app/auth.py
@@ -0,0 +1,412 @@
+"""Authentication service for Orchard.
+
+Handles password hashing, session management, and API key operations.
+"""
+
+import hashlib
+import secrets
+from datetime import datetime, timedelta
+from typing import Optional
+from passlib.context import CryptContext
+from sqlalchemy.orm import Session
+
+from .models import User, Session as UserSession, APIKey
+
+
+# Password hashing context (bcrypt with cost factor 12)
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+# API key prefix
+API_KEY_PREFIX = "orch_"
+
+# Session duration (24 hours default)
+SESSION_DURATION_HOURS = 24
+
+
+def hash_password(password: str) -> str:
+    """Hash a password using bcrypt."""
+    return pwd_context.hash(password)
+
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    """Verify a password against its hash."""
+    return pwd_context.verify(plain_password, hashed_password)
+
+
+def hash_token(token: str) -> str:
+    """Hash a token (session or API key) using SHA256."""
+    return hashlib.sha256(token.encode()).hexdigest()
+
+
+def generate_session_token() -> str:
+    """Generate a cryptographically secure session token."""
+    return secrets.token_urlsafe(32)
+
+
+def generate_api_key() -> str:
+    """Generate a new API key with prefix.
+
+    Format: orch_<32 random bytes as hex>
+    """
+    random_part = secrets.token_hex(32)
+    return f"{API_KEY_PREFIX}{random_part}"
+
+
+class AuthService:
+    """Authentication service for user management and session handling."""
+
+    def __init__(self, db: Session):
+        self.db = db
+
+    # --- User Operations ---
+
+    def create_user(
+        self,
+        username: str,
+        password: Optional[str] = None,
+        email: Optional[str] = None,
+        is_admin: bool = False,
+        must_change_password: bool = False,
+    ) -> User:
+        """Create a new user account."""
+        user = User(
+            username=username,
+            password_hash=hash_password(password) if password else None,
+            email=email,
+            is_admin=is_admin,
+            must_change_password=must_change_password,
+        )
+        self.db.add(user)
+        self.db.commit()
+        self.db.refresh(user)
+        return user
+
+    def get_user_by_username(self, username: str) -> Optional[User]:
+        """Get a user by username."""
+        return self.db.query(User).filter(User.username == username).first()
+
+    def get_user_by_id(self, user_id: str) -> Optional[User]:
+        """Get a user by ID."""
+        return self.db.query(User).filter(User.id == user_id).first()
+
+    def authenticate_user(self, username: str, password: str) -> Optional[User]:
+        """Authenticate a user with username and password.
+
+        Returns the user if authentication succeeds, None otherwise.
+        """
+        user = self.get_user_by_username(username)
+        if not user:
+            return None
+        if not user.password_hash:
+            return None  # OIDC-only user
+        if not user.is_active:
+            return None
+        if not verify_password(password, user.password_hash):
+            return None
+        return user
+
+    def change_password(self, user: User, new_password: str) -> None:
+        """Change a user's password."""
+        user.password_hash = hash_password(new_password)
+        user.must_change_password = False
+        self.db.commit()
+
+    def update_last_login(self, user: User) -> None:
+        """Update the user's last login timestamp."""
+        user.last_login = datetime.utcnow()
+        self.db.commit()
+
+    def list_users(self, include_inactive: bool = False) -> list[User]:
+        """List all users."""
+        query = self.db.query(User)
+        if not include_inactive:
+            query = query.filter(User.is_active == True)
+        return query.order_by(User.username).all()
+
+    def set_user_active(self, user: User, is_active: bool) -> None:
+        """Enable or disable a user account."""
+        user.is_active = is_active
+        self.db.commit()
+
+    def set_user_admin(self, user: User, is_admin: bool) -> None:
+        """Grant or revoke admin privileges."""
+        user.is_admin = is_admin
+        self.db.commit()
+
+    def reset_user_password(self, user: User, new_password: str) -> None:
+        """Reset a user's password (admin action)."""
+        user.password_hash = hash_password(new_password)
+        user.must_change_password = True
+        self.db.commit()
+
+    # --- Session Operations ---
+
+    def create_session(
+        self,
+        user: User,
+        user_agent: Optional[str] = None,
+        ip_address: Optional[str] = None,
+    ) -> tuple[UserSession, str]:
+        """Create a new session for a user.
+
+        Returns a tuple of (session, token) where token is the plaintext
+        token that should be sent to the client. The token is only returned
+        once and should be stored securely.
+        """
+        token = generate_session_token()
+        token_hash = hash_token(token)
+
+        session = UserSession(
+            user_id=user.id,
+            token_hash=token_hash,
+            expires_at=datetime.utcnow() + timedelta(hours=SESSION_DURATION_HOURS),
+            user_agent=user_agent,
+            ip_address=ip_address,
+        )
+        self.db.add(session)
+        self.db.commit()
+        self.db.refresh(session)
+
+        return session, token
+
+    def get_session_by_token(self, token: str) -> Optional[UserSession]:
+        """Get a session by its token.
+
+        Returns None if the session doesn't exist or has expired.
+        """
+        token_hash = hash_token(token)
+        session = (
+            self.db.query(UserSession)
+            .filter(UserSession.token_hash == token_hash)
+            .first()
+        )
+
+        if not session:
+            return None
+
+        if session.expires_at < datetime.utcnow():
+            # Session has expired, delete it
+            self.db.delete(session)
+            self.db.commit()
+            return None
+
+        # Update last accessed time
+        session.last_accessed = datetime.utcnow()
+        self.db.commit()
+
+        return session
+
+    def delete_session(self, session: UserSession) -> None:
+        """Delete a session (logout)."""
+        self.db.delete(session)
+        self.db.commit()
+
+    def delete_user_sessions(self, user: User) -> int:
+        """Delete all sessions for a user. Returns count of deleted sessions."""
+        count = (
+            self.db.query(UserSession).filter(UserSession.user_id == user.id).delete()
+        )
+        self.db.commit()
+        return count
+
+    def cleanup_expired_sessions(self) -> int:
+        """Delete all expired sessions. Returns count of deleted sessions."""
+        count = (
+            self.db.query(UserSession)
+            .filter(UserSession.expires_at < datetime.utcnow())
+            .delete()
+        )
+        self.db.commit()
+        return count
+
+    # --- API Key Operations ---
+
+    def create_api_key(
+        self,
+        user: User,
+        name: str,
+        description: Optional[str] = None,
+        scopes: Optional[list[str]] = None,
+        expires_at: Optional[datetime] = None,
+    ) -> tuple[APIKey, str]:
+        """Create a new API key for a user.
+
+        Returns a tuple of (api_key, key) where key is the plaintext
+        API key that should be sent to the client. The key is only returned
+        once and should be stored securely by the user.
+        """
+        key = generate_api_key()
+        key_hash = hash_token(key)
+
+        api_key = APIKey(
+            key_hash=key_hash,
+            name=name,
+            user_id=user.username,  # Legacy field
+            owner_id=user.id,
+            description=description,
+            scopes=scopes or ["read", "write"],
+            expires_at=expires_at,
+        )
+        self.db.add(api_key)
+        self.db.commit()
+        self.db.refresh(api_key)
+
+        return api_key, key
+
+    def get_api_key_by_key(self, key: str) -> Optional[APIKey]:
+        """Get an API key by its plaintext key.
+
+        Returns None if the key doesn't exist or has expired.
+        """
+        if not key.startswith(API_KEY_PREFIX):
+            return None
+
+        key_hash = hash_token(key)
+        api_key = self.db.query(APIKey).filter(APIKey.key_hash == key_hash).first()
+
+        if not api_key:
+            return None
+
+        # Check expiration
+        if api_key.expires_at and api_key.expires_at < datetime.utcnow():
+            return None
+
+        # Update last used time
+        api_key.last_used = datetime.utcnow()
+        self.db.commit()
+
+        return api_key
+
+    def get_api_key_by_id(self, key_id: str) -> Optional[APIKey]:
+        """Get an API key by its ID."""
+        return self.db.query(APIKey).filter(APIKey.id == key_id).first()
+
+    def list_user_api_keys(self, user: User) -> list[APIKey]:
+        """List all API keys for a user."""
+        return (
+            self.db.query(APIKey)
+            .filter(APIKey.owner_id == user.id)
+            .order_by(APIKey.created_at.desc())
+            .all()
+        )
+
+    def delete_api_key(self, api_key: APIKey) -> None:
+        """Delete an API key."""
+        self.db.delete(api_key)
+        self.db.commit()
+
+    def get_user_from_api_key(self, key: str) -> Optional[User]:
+        """Get the user associated with an API key.
+
+        Returns None if the key is invalid or the user is inactive.
+        """
+        api_key = self.get_api_key_by_key(key)
+        if not api_key:
+            return None
+
+        if not api_key.owner_id:
+            return None
+
+        user = self.db.query(User).filter(User.id == api_key.owner_id).first()
+        if not user or not user.is_active:
+            return None
+
+        return user
+
+
+def create_default_admin(db: Session) -> Optional[User]:
+    """Create the default admin user if no users exist.
+
+    Returns the created user, or None if users already exist.
+    """
+    # Check if any users exist
+    user_count = db.query(User).count()
+    if user_count > 0:
+        return None
+
+    # Create default admin
+    auth_service = AuthService(db)
+    admin = auth_service.create_user(
+        username="admin",
+        password="admin",
+        is_admin=True,
+        must_change_password=True,
+    )
+
+    return admin
+
+
+# --- FastAPI Dependencies ---
+
+from fastapi import Depends, HTTPException, status, Cookie, Header
+from .database import get_db
+
+# Cookie name for session token
+SESSION_COOKIE_NAME = "orchard_session"
+
+
+def get_current_user_optional(
+    db: Session = Depends(get_db),
+    session_token: Optional[str] = Cookie(None, alias=SESSION_COOKIE_NAME),
+    authorization: Optional[str] = Header(None),
+) -> Optional[User]:
+    """Get the current user from session cookie or API key.
+
+    Returns None if no valid authentication is provided.
+    Does not raise an exception for unauthenticated requests.
+    """
+    auth_service = AuthService(db)
+
+    # First try session cookie (web UI)
+    if session_token:
+        session = auth_service.get_session_by_token(session_token)
+        if session:
+            user = auth_service.get_user_by_id(str(session.user_id))
+            if user and user.is_active:
+                return user
+
+    # Then try API key (CLI/programmatic access)
+    if authorization:
+        if authorization.startswith("Bearer "):
+            api_key = authorization[7:]  # Remove "Bearer " prefix
+            user = auth_service.get_user_from_api_key(api_key)
+            if user:
+                return user
+
+    return None
+
+
+def get_current_user(
+    user: Optional[User] = Depends(get_current_user_optional),
+) -> User:
+    """Get the current authenticated user.
+
+    Raises HTTPException 401 if not authenticated.
+    """
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Not authenticated",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+    return user
+
+
+def require_admin(
+    user: User = Depends(get_current_user),
+) -> User:
+    """Require the current user to be an admin.
+
+    Raises HTTPException 403 if user is not an admin.
+    """
+    if not user.is_admin:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Admin privileges required",
+        )
+    return user
+
+
+def get_auth_service(db: Session = Depends(get_db)) -> AuthService:
+    """Get an AuthService instance."""
+    return AuthService(db)
--- a/backend/app/main.py
+++ b/backend/app/main.py
@@ -9,6 +9,7 @@ from .config import get_settings
 from .database import init_db, SessionLocal
 from .routes import router
 from .seed import seed_database
+from .auth import create_default_admin

 settings = get_settings()
 logging.basicConfig(level=logging.INFO)
@@ -20,6 +21,18 @@ async def lifespan(app: FastAPI):
    # Startup: initialize database
    init_db()

+    # Create default admin user if no users exist
+    db = SessionLocal()
+    try:
+        admin = create_default_admin(db)
+        if admin:
+            logger.warning(
+                "Default admin user created with username 'admin' and password 'admin'. "
+                "CHANGE THIS PASSWORD IMMEDIATELY!"
+            )
+    finally:
+        db.close()
+
    # Seed test data in development mode
    if settings.is_development:
        logger.info(f"Running in {settings.env} mode - checking for seed data")
@@ -48,7 +61,11 @@ app.include_router(router)
 # Serve static files (React build) if the directory exists
 static_dir = os.path.join(os.path.dirname(__file__), "..", "..", "frontend", "dist")
 if os.path.exists(static_dir):
-    app.mount("/assets", StaticFiles(directory=os.path.join(static_dir, "assets")), name="assets")
+    app.mount(
+        "/assets",
+        StaticFiles(directory=os.path.join(static_dir, "assets")),
+        name="assets",
+    )

    @app.get("/")
    async def serve_spa():
@@ -60,6 +77,7 @@ if os.path.exists(static_dir):
        # Don't catch API routes or health endpoint
        if full_path.startswith("api/") or full_path.startswith("health"):
            from fastapi import HTTPException
+
            raise HTTPException(status_code=404, detail="Not found")

        # Serve SPA for all other routes (including /project/*)
@@ -68,4 +86,5 @@ if os.path.exists(static_dir):
            return FileResponse(index_path)

        from fastapi import HTTPException
+
        raise HTTPException(status_code=404, detail="Not found")
--- a/backend/app/models.py
+++ b/backend/app/models.py
@@ -11,6 +11,7 @@ from sqlalchemy import (
    CheckConstraint,
    Index,
    JSON,
+    ARRAY,
 )
 from sqlalchemy.dialects.postgresql import UUID
 from sqlalchemy.orm import relationship, declarative_base
@@ -302,20 +303,104 @@ class AccessPermission(Base):
    )


+class User(Base):
+    """User account for authentication."""
+
+    __tablename__ = "users"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    username = Column(String(255), unique=True, nullable=False)
+    password_hash = Column(String(255))  # NULL if OIDC-only user
+    email = Column(String(255))
+    is_admin = Column(Boolean, default=False)
+    is_active = Column(Boolean, default=True)
+    must_change_password = Column(Boolean, default=False)
+    oidc_subject = Column(String(255))  # OIDC subject claim
+    oidc_issuer = Column(String(512))  # OIDC issuer URL
+    created_at = Column(DateTime(timezone=True), default=datetime.utcnow)
+    updated_at = Column(
+        DateTime(timezone=True), default=datetime.utcnow, onupdate=datetime.utcnow
+    )
+    last_login = Column(DateTime(timezone=True))
+
+    # Relationships
+    api_keys = relationship(
+        "APIKey", back_populates="owner", cascade="all, delete-orphan"
+    )
+    sessions = relationship(
+        "Session", back_populates="user", cascade="all, delete-orphan"
+    )
+
+    __table_args__ = (
+        Index("idx_users_username", "username"),
+        Index("idx_users_email", "email"),
+        Index("idx_users_oidc_subject", "oidc_subject"),
+    )
+
+
+class Session(Base):
+    """User session for web login."""
+
+    __tablename__ = "sessions"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    user_id = Column(
+        UUID(as_uuid=True),
+        ForeignKey("users.id", ondelete="CASCADE"),
+        nullable=False,
+    )
+    token_hash = Column(String(64), unique=True, nullable=False)
+    created_at = Column(DateTime(timezone=True), default=datetime.utcnow)
+    expires_at = Column(DateTime(timezone=True), nullable=False)
+    last_accessed = Column(DateTime(timezone=True), default=datetime.utcnow)
+    user_agent = Column(String(512))
+    ip_address = Column(String(45))
+
+    user = relationship("User", back_populates="sessions")
+
+    __table_args__ = (
+        Index("idx_sessions_user_id", "user_id"),
+        Index("idx_sessions_token_hash", "token_hash"),
+        Index("idx_sessions_expires_at", "expires_at"),
+    )
+
+
+class AuthSettings(Base):
+    """Authentication settings for OIDC configuration."""
+
+    __tablename__ = "auth_settings"
+
+    key = Column(String(255), primary_key=True)
+    value = Column(Text, nullable=False)
+    updated_at = Column(DateTime(timezone=True), default=datetime.utcnow)
+
+
 class APIKey(Base):
    __tablename__ = "api_keys"

    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    key_hash = Column(String(64), unique=True, nullable=False)
    name = Column(String(255), nullable=False)
-    user_id = Column(String(255), nullable=False)
+    user_id = Column(
+        String(255), nullable=False
+    )  # Legacy field, kept for compatibility
+    owner_id = Column(
+        UUID(as_uuid=True),
+        ForeignKey("users.id", ondelete="CASCADE"),
+        nullable=True,  # Nullable for migration compatibility
+    )
+    description = Column(Text)
+    scopes = Column(ARRAY(String), default=["read", "write"])
    created_at = Column(DateTime(timezone=True), default=datetime.utcnow)
    expires_at = Column(DateTime(timezone=True))
    last_used = Column(DateTime(timezone=True))

+    owner = relationship("User", back_populates="api_keys")
+
    __table_args__ = (
        Index("idx_api_keys_user_id", "user_id"),
        Index("idx_api_keys_key_hash", "key_hash"),
+        Index("idx_api_keys_owner_id", "owner_id"),
    )


--- a/backend/app/routes.py
+++ b/backend/app/routes.py
@@ -11,6 +11,8 @@ from fastapi import (
    Query,
    Header,
    Response,
+    Cookie,
+    status,
 )
 from fastapi.responses import StreamingResponse, RedirectResponse
 from sqlalchemy.orm import Session
@@ -42,6 +44,7 @@ from .models import (
    UploadLock,
    Consumer,
    AuditLog,
+    User,
 )
 from .schemas import (
    ProjectCreate,
@@ -94,6 +97,16 @@ from .schemas import (
    StatsReportResponse,
    GlobalArtifactResponse,
    GlobalTagResponse,
+    LoginRequest,
+    LoginResponse,
+    ChangePasswordRequest,
+    UserResponse,
+    UserCreate,
+    UserUpdate,
+    ResetPasswordRequest,
+    APIKeyCreate,
+    APIKeyResponse,
+    APIKeyCreateResponse,
 )
 from .metadata import extract_metadata
 from .config import get_settings
@@ -118,14 +131,39 @@ def sanitize_filename(filename: str) -> str:
    return re.sub(r'[\r\n"]', "", filename)


+def get_user_id_from_request(
+    request: Request,
+    db: Session,
+    current_user: Optional[User] = None,
+) -> str:
+    """Extract user ID from request using auth system.
+
+    If a current_user is provided (from auth dependency), use their username.
+    Otherwise, try to authenticate from headers and fall back to 'anonymous'.
+    """
+    if current_user:
+        return current_user.username
+
+    # Try to authenticate from API key header
+    auth_header = request.headers.get("Authorization")
+    if auth_header and auth_header.startswith("Bearer "):
+        api_key = auth_header[7:]
+        auth_service = AuthService(db)
+        user = auth_service.get_user_from_api_key(api_key)
+        if user:
+            return user.username
+
+    return "anonymous"
+
+
 def get_user_id(request: Request) -> str:
-    """Extract user ID from request (simplified for now)"""
-    api_key = request.headers.get("X-Orchard-API-Key")
-    if api_key:
-        return "api-user"
+    """Legacy function for backward compatibility.
+
+    DEPRECATED: Use get_user_id_from_request with db session for proper auth.
+    """
    auth = request.headers.get("Authorization")
-    if auth:
-        return "bearer-user"
+    if auth and auth.startswith("Bearer "):
+        return "authenticated-user"
    return "anonymous"


@@ -320,6 +358,460 @@ def health_check(
    )


+# --- Authentication Routes ---
+
+from .auth import (
+    AuthService,
+    get_current_user,
+    get_current_user_optional,
+    require_admin,
+    get_auth_service,
+    SESSION_COOKIE_NAME,
+    verify_password,
+)
+
+
+@router.post("/api/v1/auth/login", response_model=LoginResponse)
+def login(
+    login_request: LoginRequest,
+    request: Request,
+    response: Response,
+    auth_service: AuthService = Depends(get_auth_service),
+):
+    """
+    Login with username and password.
+    Returns user info and sets a session cookie.
+    """
+    user = auth_service.authenticate_user(
+        login_request.username, login_request.password
+    )
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Invalid username or password",
+        )
+
+    # Create session
+    session, token = auth_service.create_session(
+        user,
+        user_agent=request.headers.get("User-Agent"),
+        ip_address=request.client.host if request.client else None,
+    )
+
+    # Update last login
+    auth_service.update_last_login(user)
+
+    # Set session cookie
+    response.set_cookie(
+        key=SESSION_COOKIE_NAME,
+        value=token,
+        httponly=True,
+        secure=request.url.scheme == "https",
+        samesite="lax",
+        max_age=24 * 60 * 60,  # 24 hours
+    )
+
+    # Log audit
+    _log_audit(
+        auth_service.db,
+        "auth.login",
+        f"user:{user.username}",
+        user.username,
+        request,
+        {"user_id": str(user.id)},
+    )
+
+    return LoginResponse(
+        id=user.id,
+        username=user.username,
+        email=user.email,
+        is_admin=user.is_admin,
+        must_change_password=user.must_change_password,
+    )
+
+
+@router.post("/api/v1/auth/logout")
+def logout(
+    request: Request,
+    response: Response,
+    db: Session = Depends(get_db),
+    session_token: Optional[str] = Cookie(None, alias=SESSION_COOKIE_NAME),
+):
+    """
+    Logout and invalidate the session.
+    """
+    if session_token:
+        auth_service = AuthService(db)
+        session = auth_service.get_session_by_token(session_token)
+        if session:
+            auth_service.delete_session(session)
+
+    # Clear the session cookie
+    response.delete_cookie(key=SESSION_COOKIE_NAME)
+
+    return {"message": "Logged out successfully"}
+
+
+@router.get("/api/v1/auth/me", response_model=UserResponse)
+def get_current_user_info(
+    current_user: User = Depends(get_current_user),
+):
+    """
+    Get information about the currently authenticated user.
+    """
+    return UserResponse(
+        id=current_user.id,
+        username=current_user.username,
+        email=current_user.email,
+        is_admin=current_user.is_admin,
+        is_active=current_user.is_active,
+        must_change_password=current_user.must_change_password,
+        created_at=current_user.created_at,
+        last_login=current_user.last_login,
+    )
+
+
+@router.post("/api/v1/auth/change-password")
+def change_password(
+    password_request: ChangePasswordRequest,
+    request: Request,
+    current_user: User = Depends(get_current_user),
+    auth_service: AuthService = Depends(get_auth_service),
+):
+    """
+    Change the current user's password.
+    Requires the current password for verification.
+    """
+    # Verify current password
+    if not verify_password(
+        password_request.current_password, current_user.password_hash
+    ):
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Current password is incorrect",
+        )
+
+    # Change password
+    auth_service.change_password(current_user, password_request.new_password)
+
+    # Log audit
+    _log_audit(
+        auth_service.db,
+        "auth.password_change",
+        f"user:{current_user.username}",
+        current_user.username,
+        request,
+    )
+
+    return {"message": "Password changed successfully"}
+
+
+# --- API Key Routes ---
+
+
+@router.post("/api/v1/auth/keys", response_model=APIKeyCreateResponse)
+def create_api_key(
+    key_request: APIKeyCreate,
+    request: Request,
+    current_user: User = Depends(get_current_user),
+    auth_service: AuthService = Depends(get_auth_service),
+):
+    """
+    Create a new API key for the current user.
+    The key is only returned once - store it securely!
+    """
+    api_key, key = auth_service.create_api_key(
+        user=current_user,
+        name=key_request.name,
+        description=key_request.description,
+        scopes=key_request.scopes,
+    )
+
+    # Log audit
+    _log_audit(
+        auth_service.db,
+        "auth.api_key_create",
+        f"api_key:{api_key.id}",
+        current_user.username,
+        request,
+        {"key_name": key_request.name},
+    )
+
+    return APIKeyCreateResponse(
+        id=api_key.id,
+        name=api_key.name,
+        description=api_key.description,
+        scopes=api_key.scopes,
+        key=key,
+        created_at=api_key.created_at,
+        expires_at=api_key.expires_at,
+    )
+
+
+@router.get("/api/v1/auth/keys", response_model=List[APIKeyResponse])
+def list_api_keys(
+    current_user: User = Depends(get_current_user),
+    auth_service: AuthService = Depends(get_auth_service),
+):
+    """
+    List all API keys for the current user.
+    Does not include the secret key.
+    """
+    keys = auth_service.list_user_api_keys(current_user)
+    return [
+        APIKeyResponse(
+            id=k.id,
+            name=k.name,
+            description=k.description,
+            scopes=k.scopes,
+            created_at=k.created_at,
+            expires_at=k.expires_at,
+            last_used=k.last_used,
+        )
+        for k in keys
+    ]
+
+
+@router.delete("/api/v1/auth/keys/{key_id}")
+def delete_api_key(
+    key_id: str,
+    request: Request,
+    current_user: User = Depends(get_current_user),
+    auth_service: AuthService = Depends(get_auth_service),
+):
+    """
+    Revoke an API key.
+    Users can only delete their own keys, unless they are an admin.
+    """
+    api_key = auth_service.get_api_key_by_id(key_id)
+    if not api_key:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="API key not found",
+        )
+
+    # Check ownership (admins can delete any key)
+    if api_key.owner_id != current_user.id and not current_user.is_admin:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Cannot delete another user's API key",
+        )
+
+    key_name = api_key.name
+    auth_service.delete_api_key(api_key)
+
+    # Log audit
+    _log_audit(
+        auth_service.db,
+        "auth.api_key_delete",
+        f"api_key:{key_id}",
+        current_user.username,
+        request,
+        {"key_name": key_name},
+    )
+
+    return {"message": "API key deleted successfully"}
+
+
+# --- Admin User Management Routes ---
+
+
+@router.get("/api/v1/admin/users", response_model=List[UserResponse])
+def list_users(
+    include_inactive: bool = Query(default=False),
+    current_user: User = Depends(require_admin),
+    auth_service: AuthService = Depends(get_auth_service),
+):
+    """
+    List all users (admin only).
+    """
+    users = auth_service.list_users(include_inactive=include_inactive)
+    return [
+        UserResponse(
+            id=u.id,
+            username=u.username,
+            email=u.email,
+            is_admin=u.is_admin,
+            is_active=u.is_active,
+            must_change_password=u.must_change_password,
+            created_at=u.created_at,
+            last_login=u.last_login,
+        )
+        for u in users
+    ]
+
+
+@router.post("/api/v1/admin/users", response_model=UserResponse)
+def create_user(
+    user_create: UserCreate,
+    request: Request,
+    current_user: User = Depends(require_admin),
+    auth_service: AuthService = Depends(get_auth_service),
+):
+    """
+    Create a new user (admin only).
+    """
+    # Check if username already exists
+    existing = auth_service.get_user_by_username(user_create.username)
+    if existing:
+        raise HTTPException(
+            status_code=status.HTTP_409_CONFLICT,
+            detail="Username already exists",
+        )
+
+    user = auth_service.create_user(
+        username=user_create.username,
+        password=user_create.password,
+        email=user_create.email,
+        is_admin=user_create.is_admin,
+    )
+
+    # Log audit
+    _log_audit(
+        auth_service.db,
+        "admin.user_create",
+        f"user:{user.username}",
+        current_user.username,
+        request,
+        {"new_user": user_create.username, "is_admin": user_create.is_admin},
+    )
+
+    return UserResponse(
+        id=user.id,
+        username=user.username,
+        email=user.email,
+        is_admin=user.is_admin,
+        is_active=user.is_active,
+        must_change_password=user.must_change_password,
+        created_at=user.created_at,
+        last_login=user.last_login,
+    )
+
+
+@router.get("/api/v1/admin/users/{username}", response_model=UserResponse)
+def get_user(
+    username: str,
+    current_user: User = Depends(require_admin),
+    auth_service: AuthService = Depends(get_auth_service),
+):
+    """
+    Get a specific user by username (admin only).
+    """
+    user = auth_service.get_user_by_username(username)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="User not found",
+        )
+
+    return UserResponse(
+        id=user.id,
+        username=user.username,
+        email=user.email,
+        is_admin=user.is_admin,
+        is_active=user.is_active,
+        must_change_password=user.must_change_password,
+        created_at=user.created_at,
+        last_login=user.last_login,
+    )
+
+
+@router.put("/api/v1/admin/users/{username}", response_model=UserResponse)
+def update_user(
+    username: str,
+    user_update: UserUpdate,
+    request: Request,
+    current_user: User = Depends(require_admin),
+    auth_service: AuthService = Depends(get_auth_service),
+):
+    """
+    Update a user (admin only).
+    """
+    user = auth_service.get_user_by_username(username)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="User not found",
+        )
+
+    # Prevent removing the last admin
+    if user_update.is_admin is False and user.is_admin:
+        admin_count = (
+            auth_service.db.query(User)
+            .filter(User.is_admin == True, User.is_active == True)
+            .count()
+        )
+        if admin_count <= 1:
+            raise HTTPException(
+                status_code=status.HTTP_400_BAD_REQUEST,
+                detail="Cannot remove the last admin",
+            )
+
+    # Update fields
+    if user_update.email is not None:
+        user.email = user_update.email
+    if user_update.is_admin is not None:
+        user.is_admin = user_update.is_admin
+    if user_update.is_active is not None:
+        user.is_active = user_update.is_active
+
+    auth_service.db.commit()
+
+    # Log audit
+    _log_audit(
+        auth_service.db,
+        "admin.user_update",
+        f"user:{username}",
+        current_user.username,
+        request,
+        {"updates": user_update.model_dump(exclude_none=True)},
+    )
+
+    return UserResponse(
+        id=user.id,
+        username=user.username,
+        email=user.email,
+        is_admin=user.is_admin,
+        is_active=user.is_active,
+        must_change_password=user.must_change_password,
+        created_at=user.created_at,
+        last_login=user.last_login,
+    )
+
+
+@router.post("/api/v1/admin/users/{username}/reset-password")
+def reset_user_password(
+    username: str,
+    reset_request: ResetPasswordRequest,
+    request: Request,
+    current_user: User = Depends(require_admin),
+    auth_service: AuthService = Depends(get_auth_service),
+):
+    """
+    Reset a user's password (admin only).
+    Sets must_change_password to True.
+    """
+    user = auth_service.get_user_by_username(username)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="User not found",
+        )
+
+    auth_service.reset_user_password(user, reset_request.new_password)
+
+    # Log audit
+    _log_audit(
+        auth_service.db,
+        "admin.password_reset",
+        f"user:{username}",
+        current_user.username,
+        request,
+    )
+
+    return {"message": f"Password reset for user {username}"}
+
+
 # Global search
@router.get("/api/v1/search", response_model=GlobalSearchResponse)
 def global_search(
@@ -513,9 +1005,12 @@ def list_projects(

@router.post("/api/v1/projects", response_model=ProjectResponse)
 def create_project(
-    project: ProjectCreate, request: Request, db: Session = Depends(get_db)
+    project: ProjectCreate,
+    request: Request,
+    db: Session = Depends(get_db),
+    current_user: Optional[User] = Depends(get_current_user_optional),
 ):
-    user_id = get_user_id(request)
+    user_id = get_user_id_from_request(request, db, current_user)

    existing = db.query(Project).filter(Project.name == project.name).first()
    if existing:
@@ -1150,6 +1645,7 @@ def upload_artifact(
    content_length: Optional[int] = Header(None, alias="Content-Length"),
    user_agent: Optional[str] = Header(None, alias="User-Agent"),
    client_checksum: Optional[str] = Header(None, alias="X-Checksum-SHA256"),
+    current_user: Optional[User] = Depends(get_current_user_optional),
 ):
    """
    Upload an artifact to a package.
@@ -1157,9 +1653,10 @@ def upload_artifact(
    Headers:
    - X-Checksum-SHA256: Optional client-provided SHA256 for verification
    - User-Agent: Captured for audit purposes
+    - Authorization: Bearer <api-key> for authentication
    """
    start_time = time.time()
-    user_id = get_user_id(request)
+    user_id = get_user_id_from_request(request, db, current_user)
    settings = get_settings()
    storage_result = None

--- a/backend/app/schemas.py
+++ b/backend/app/schemas.py
@@ -686,3 +686,93 @@ class StatsReportResponse(BaseModel):
    format: str  # "json", "csv", "markdown"
    generated_at: datetime
    content: str  # The report content
+
+
+# Authentication schemas
+class LoginRequest(BaseModel):
+    """Login request with username and password"""
+    username: str
+    password: str
+
+
+class LoginResponse(BaseModel):
+    """Login response with user info"""
+    id: UUID
+    username: str
+    email: Optional[str]
+    is_admin: bool
+    must_change_password: bool
+
+
+class ChangePasswordRequest(BaseModel):
+    """Change password request"""
+    current_password: str
+    new_password: str
+
+
+class UserResponse(BaseModel):
+    """User information response"""
+    id: UUID
+    username: str
+    email: Optional[str]
+    is_admin: bool
+    is_active: bool
+    must_change_password: bool
+    created_at: datetime
+    last_login: Optional[datetime]
+
+    class Config:
+        from_attributes = True
+
+
+class UserCreate(BaseModel):
+    """Create user request (admin only)"""
+    username: str
+    password: str
+    email: Optional[str] = None
+    is_admin: bool = False
+
+
+class UserUpdate(BaseModel):
+    """Update user request (admin only)"""
+    email: Optional[str] = None
+    is_admin: Optional[bool] = None
+    is_active: Optional[bool] = None
+
+
+class ResetPasswordRequest(BaseModel):
+    """Reset password request (admin only)"""
+    new_password: str
+
+
+class APIKeyCreate(BaseModel):
+    """Create API key request"""
+    name: str
+    description: Optional[str] = None
+    scopes: Optional[List[str]] = None
+
+
+class APIKeyResponse(BaseModel):
+    """API key response (without the secret key)"""
+    id: UUID
+    name: str
+    description: Optional[str]
+    scopes: Optional[List[str]]
+    created_at: datetime
+    expires_at: Optional[datetime]
+    last_used: Optional[datetime]
+
+    class Config:
+        from_attributes = True
+
+
+class APIKeyCreateResponse(BaseModel):
+    """API key creation response (includes the secret key - only shown once)"""
+    id: UUID
+    name: str
+    description: Optional[str]
+    scopes: Optional[List[str]]
+    key: str  # The actual API key - only returned on creation
+    created_at: datetime
+    expires_at: Optional[datetime]
+