Init Repo

2026-02-28 03:22:04 +08:00
commit de59b57ee7
883 changed files with 156857 additions and 0 deletions
@@ -0,0 +1,473 @@
+from passlib.context import CryptContext
+from jose import JWTError, jwt
+from datetime import datetime, timedelta
+from typing import Optional, Union
+from fastapi import HTTPException, status, Depends, Request
+from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
+from sqlalchemy.orm import Session
+import os
+import secrets
+import hashlib
+import json
+import logging
+
+# Setup logger
+logger = logging.getLogger("vfx_auth")
+
+# Password hashing
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+# JWT settings
+SECRET_KEY = os.getenv("SECRET_KEY", "your-secret-key-here-change-in-production")
+REFRESH_SECRET_KEY = os.getenv("REFRESH_SECRET_KEY", "your-refresh-secret-key-here-change-in-production")
+ALGORITHM = "HS256"
+ACCESS_TOKEN_EXPIRE_MINUTES = 30
+REFRESH_TOKEN_EXPIRE_DAYS = 7
+
+# Security scheme
+security = HTTPBearer()
+
+# API Key settings
+API_KEY_PREFIX = "vfx_"
+API_KEY_LENGTH = 32
+
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    """Verify a plain password against its hash."""
+    return pwd_context.verify(plain_password, hashed_password)
+
+
+def get_password_hash(password: str) -> str:
+    """Hash a password using bcrypt."""
+    return pwd_context.hash(password)
+
+
+def create_access_token(data: dict, expires_delta: Optional[timedelta] = None):
+    """Create a JWT access token."""
+    to_encode = data.copy()
+    if expires_delta:
+        expire = datetime.utcnow() + expires_delta
+    else:
+        expire = datetime.utcnow() + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
+    
+    to_encode.update({"exp": expire, "type": "access"})
+    encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
+    return encoded_jwt
+
+
+def create_refresh_token(data: dict, expires_delta: Optional[timedelta] = None):
+    """Create a JWT refresh token."""
+    to_encode = data.copy()
+    if expires_delta:
+        expire = datetime.utcnow() + expires_delta
+    else:
+        expire = datetime.utcnow() + timedelta(days=REFRESH_TOKEN_EXPIRE_DAYS)
+    
+    to_encode.update({"exp": expire, "type": "refresh"})
+    encoded_jwt = jwt.encode(to_encode, REFRESH_SECRET_KEY, algorithm=ALGORITHM)
+    return encoded_jwt
+
+
+def verify_token(token: str, token_type: str = "access") -> Optional[dict]:
+    """Verify and decode a JWT token."""
+    try:
+        secret_key = SECRET_KEY if token_type == "access" else REFRESH_SECRET_KEY
+        logger.debug(f"🔐 Decoding {token_type} token with secret: {secret_key[:10]}...")
+        
+        payload = jwt.decode(token, secret_key, algorithms=[ALGORITHM])
+        logger.debug(f"🔐 Token decoded successfully: {payload}")
+        
+        # Verify token type
+        if payload.get("type") != token_type:
+            logger.warning(f"🔐 Token type mismatch: expected {token_type}, got {payload.get('type')}")
+            return None
+            
+        return payload
+    except JWTError as e:
+        logger.warning(f"🔐 JWT decode error: {e}")
+        return None
+
+
+def get_current_user_from_token(credentials: HTTPAuthorizationCredentials = Depends(security)):
+    """Extract user information from JWT token."""
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+        headers={"WWW-Authenticate": "Bearer"},
+    )
+    
+    try:
+        logger.debug(f"🔐 Verifying token: {credentials.credentials[:20]}...")
+        payload = verify_token(credentials.credentials, "access")
+        if payload is None:
+            logger.warning("🔐 Token verification failed - invalid token")
+            raise credentials_exception
+            
+        logger.debug(f"🔐 Token payload: {payload}")
+        
+        user_id_str = payload.get("sub")
+        if user_id_str is None:
+            logger.warning("🔐 Token verification failed - no sub field")
+            raise credentials_exception
+        
+        try:
+            user_id = int(user_id_str)
+            logger.debug(f"🔐 Extracted user_id: {user_id}")
+        except (ValueError, TypeError):
+            logger.warning(f"🔐 Token verification failed - invalid user_id: {user_id_str}")
+            raise credentials_exception
+            
+        return {"user_id": user_id, "email": payload.get("email")}
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error(f"🔐 Token verification error: {e}")
+        raise credentials_exception
+
+
+
+
+
+def get_current_user(
+    token_data: dict = Depends(get_current_user_from_token),
+    db: Session = Depends(lambda: None)
+):
+    """Get current user from database using token data."""
+    from database import get_db
+    
+    # Get database session if not provided
+    if db is None:
+        db_gen = get_db()
+        db = next(db_gen)
+        try:
+            return _get_user_from_db(db, token_data["user_id"])
+        finally:
+            db.close()
+    else:
+        return _get_user_from_db(db, token_data["user_id"])
+
+
+def _get_user_from_db(db: Session, user_id: int):
+    """Helper function to get user from database."""
+    from models.user import User
+    
+    logger.debug(f"🔐 Looking up user_id: {user_id}")
+    user = db.query(User).filter(User.id == user_id).first()
+    if user is None:
+        logger.warning(f"🔐 User not found: {user_id}")
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="User not found"
+        )
+    
+    logger.debug(f"🔐 Found user: {user.email} (approved: {user.is_approved})")
+    if not user.is_approved:
+        logger.warning(f"🔐 User not approved: {user.email}")
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="User account not approved"
+        )
+    
+    return user
+
+
+def get_current_user_with_db(
+    token_data: dict = Depends(get_current_user_from_token),
+    db: Session = Depends(lambda: None)
+):
+    """Get current user with database dependency injection."""
+    from database import get_db
+    
+    if db is None:
+        # This should not happen in normal FastAPI usage
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail="Database session not available"
+        )
+    
+    return _get_user_from_db(db, token_data["user_id"])
+
+
+def require_role(required_roles: list):
+    """Decorator to require specific user roles."""
+    def role_checker(
+        token_data: dict = Depends(get_current_user_from_token),
+        db: Session = Depends(lambda: None)
+    ):
+        from database import get_db
+        
+        # Get database session if not provided
+        if db is None:
+            db_gen = get_db()
+            db = next(db_gen)
+            try:
+                current_user = _get_user_from_db(db, token_data["user_id"])
+            finally:
+                db.close()
+        else:
+            current_user = _get_user_from_db(db, token_data["user_id"])
+        
+        if current_user.role not in required_roles:
+            raise HTTPException(
+                status_code=status.HTTP_403_FORBIDDEN,
+                detail="Insufficient permissions"
+            )
+        return current_user
+    return role_checker
+
+
+def require_admin_permission():
+    """Decorator to require admin permission regardless of role."""
+    def admin_checker(
+        token_data: dict = Depends(get_current_user_from_token),
+        db: Session = Depends(lambda: None)
+    ):
+        from database import get_db
+        
+        # Get database session if not provided
+        if db is None:
+            db_gen = get_db()
+            db = next(db_gen)
+            try:
+                current_user = _get_user_from_db(db, token_data["user_id"])
+            finally:
+                db.close()
+        else:
+            current_user = _get_user_from_db(db, token_data["user_id"])
+        
+        if not current_user.is_admin:
+            raise HTTPException(
+                status_code=status.HTTP_403_FORBIDDEN,
+                detail="Admin permission required"
+            )
+        return current_user
+    return admin_checker
+
+
+def create_role_dependency(required_roles: list):
+    """Create a dependency that requires specific user roles with proper DB injection."""
+    def role_checker(
+        token_data: dict = Depends(get_current_user_from_token),
+        db: Session = None
+    ):
+        from database import get_db
+        
+        # Get database session if not provided
+        if db is None:
+            db_gen = get_db()
+            db = next(db_gen)
+            try:
+                current_user = _get_user_from_db(db, token_data["user_id"])
+            finally:
+                db.close()
+        else:
+            current_user = _get_user_from_db(db, token_data["user_id"])
+        
+        if current_user.role not in required_roles:
+            raise HTTPException(
+                status_code=status.HTTP_403_FORBIDDEN,
+                detail="Insufficient permissions"
+            )
+        return current_user
+    return role_checker
+
+
+# API Key utilities
+def generate_api_key() -> str:
+    """Generate a new API key."""
+    random_part = secrets.token_urlsafe(API_KEY_LENGTH)
+    return f"{API_KEY_PREFIX}{random_part}"
+
+
+def hash_api_key(api_key: str) -> str:
+    """Hash an API key for secure storage."""
+    return hashlib.sha256(api_key.encode()).hexdigest()
+
+
+def verify_api_key_format(api_key: str) -> bool:
+    """Verify that an API key has the correct format."""
+    return api_key.startswith(API_KEY_PREFIX) and len(api_key) > len(API_KEY_PREFIX)
+
+
+def get_current_user_from_api_key(
+    request: Request,
+    db: Session = Depends(lambda: None)
+) -> Optional[dict]:
+    """Extract user information from API key."""
+    from database import get_db
+    from models.api_key import APIKey
+    from models.api_key_usage import APIKeyUsage
+    
+    # Get API key from header
+    api_key = request.headers.get("X-API-Key")
+    if not api_key:
+        return None
+    
+    # Verify format
+    if not verify_api_key_format(api_key):
+        return None
+    
+    # Get database session if not provided
+    if db is None:
+        db_gen = get_db()
+        db = next(db_gen)
+        try:
+            return _verify_api_key_and_get_user(db, api_key, request)
+        finally:
+            db.close()
+    else:
+        return _verify_api_key_and_get_user(db, api_key, request)
+
+
+def _verify_api_key_and_get_user(db: Session, api_key: str, request: Request) -> Optional[dict]:
+    """Helper function to verify API key and get user."""
+    from models.api_key import APIKey
+    from models.api_key_usage import APIKeyUsage
+    from models.user import User
+    
+    # Hash the provided key
+    key_hash = hash_api_key(api_key)
+    
+    # Find the API key in database
+    api_key_record = db.query(APIKey).filter(
+        APIKey.key_hash == key_hash,
+        APIKey.is_active == True
+    ).first()
+    
+    if not api_key_record:
+        return None
+    
+    # Check if key is expired
+    if api_key_record.expires_at and api_key_record.expires_at < datetime.utcnow():
+        return None
+    
+    # Get the user
+    user = db.query(User).filter(User.id == api_key_record.user_id).first()
+    if not user or not user.is_approved:
+        return None
+    
+    # Log API key usage
+    usage_log = APIKeyUsage(
+        api_key_id=api_key_record.id,
+        endpoint=str(request.url.path),
+        method=request.method,
+        ip_address=request.client.host if request.client else None,
+        user_agent=request.headers.get("User-Agent")
+    )
+    db.add(usage_log)
+    
+    # Update last used timestamp
+    api_key_record.last_used_at = datetime.utcnow()
+    db.commit()
+    
+    # Parse scopes
+    try:
+        scopes = json.loads(api_key_record.scopes)
+    except json.JSONDecodeError:
+        scopes = []
+    
+    return {
+        "user_id": user.id,
+        "email": user.email,
+        "role": user.role,
+        "api_key_id": api_key_record.id,
+        "scopes": scopes,
+        "auth_type": "api_key"
+    }
+
+
+def get_current_user_flexible(
+    request: Request,
+    credentials: Optional[HTTPAuthorizationCredentials] = Depends(security),
+    db: Session = Depends(lambda: None)
+):
+    """Get current user from either JWT token or API key."""
+    from database import get_db
+    
+    # Get database session if not provided
+    if db is None:
+        db_gen = get_db()
+        db = next(db_gen)
+        try:
+            return _get_current_user_flexible_with_db(request, credentials, db)
+        finally:
+            db.close()
+    else:
+        return _get_current_user_flexible_with_db(request, credentials, db)
+
+
+def _get_current_user_flexible_with_db(
+    request: Request,
+    credentials: Optional[HTTPAuthorizationCredentials],
+    db: Session
+):
+    """Helper function for flexible authentication with database session."""
+    # Try API key first
+    api_key_user = get_current_user_from_api_key(request, db)
+    if api_key_user:
+        # Get full user object
+        user = _get_user_from_db(db, api_key_user["user_id"])
+        # Add API key specific data
+        user.api_key_id = api_key_user["api_key_id"]
+        user.scopes = api_key_user["scopes"]
+        user.auth_type = "api_key"
+        return user
+    
+    # Try JWT token
+    if credentials:
+        try:
+            payload = verify_token(credentials.credentials, "access")
+            if payload:
+                user = _get_user_from_db(db, payload.get("sub"))
+                user.auth_type = "jwt"
+                return user
+        except Exception:
+            pass
+    
+    # No valid authentication found
+    raise HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+        headers={"WWW-Authenticate": "Bearer"},
+    )
+
+
+def check_api_key_scope(user, required_scope: str) -> bool:
+    """Check if the current user (authenticated via API key) has the required scope."""
+    if not hasattr(user, 'auth_type') or user.auth_type != 'api_key':
+        # JWT tokens have full access based on user role
+        return True
+    
+    if not hasattr(user, 'scopes'):
+        return False
+    
+    # Check if user has the specific scope or full access
+    return required_scope in user.scopes or "full:access" in user.scopes
+
+
+def require_api_key_scope(required_scope: str):
+    """Decorator to require specific API key scope."""
+    def scope_checker(
+        request: Request,
+        credentials: Optional[HTTPAuthorizationCredentials] = Depends(security),
+        db: Session = Depends(lambda: None)
+    ):
+        from database import get_db
+        
+        if db is None:
+            db_gen = get_db()
+            db = next(db_gen)
+            try:
+                user = _get_current_user_flexible_with_db(request, credentials, db)
+            finally:
+                db.close()
+        else:
+            user = _get_current_user_flexible_with_db(request, credentials, db)
+        
+        if not check_api_key_scope(user, required_scope):
+            raise HTTPException(
+                status_code=status.HTTP_403_FORBIDDEN,
+                detail=f"Insufficient permissions. Required scope: {required_scope}"
+            )
+        return user
+    return scope_checker