init commit

shared/auth.py

@@ -0,0 +1,68 @@
+"""
+Authentication utilities for all services.
+This module provides common authentication functionality to avoid circular imports.
+"""
+
+from datetime import datetime, timedelta
+from typing import Optional
+import jwt
+from jwt.exceptions import InvalidTokenError
+from fastapi import Depends, HTTPException, status
+from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
+from passlib.context import CryptContext
+from shared.config import settings
+
+# Password hashing
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+# Bearer token scheme
+security = HTTPBearer()
+
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    """Verify password against hash."""
+    return pwd_context.verify(plain_password, hashed_password)
+
+
+def get_password_hash(password: str) -> str:
+    """Get password hash."""
+    return pwd_context.hash(password)
+
+
+def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
+    """Create access token."""
+    to_encode = data.copy()
+    if expires_delta:
+        expire = datetime.utcnow() + expires_delta
+    else:
+        expire = datetime.utcnow() + timedelta(minutes=15)
+    to_encode.update({"exp": expire})
+    encoded_jwt = jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)
+    return encoded_jwt
+
+
+def verify_token(token: str) -> Optional[dict]:
+    """Verify and decode JWT token."""
+    try:
+        payload = jwt.decode(token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM])
+        user_id: str = payload.get("sub")
+        if user_id is None:
+            return None
+        return {"user_id": int(user_id), "email": payload.get("email")}
+    except InvalidTokenError:
+        return None
+
+
+async def get_current_user_from_token(credentials: HTTPAuthorizationCredentials = Depends(security)) -> dict:
+    """Get current user from JWT token."""
+    token = credentials.credentials
+    user_data = verify_token(token)
+    
+    if user_data is None:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Could not validate credentials",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+    
+    return user_data