141 lines
5.0 KiB
Python
141 lines
5.0 KiB
Python
"""Authentication service."""
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from typing import Optional
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from datetime import datetime, timedelta
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from fastapi import Depends, HTTPException, status
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from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
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from sqlalchemy.orm import Session
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import jwt
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import bcrypt
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from ..core.config import settings
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from ..db.database import get_db
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from ..models.user import User
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security = HTTPBearer()
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class AuthService:
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"""Authentication service."""
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@staticmethod
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def verify_password(plain_password: str, hashed_password: str) -> bool:
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"""Verify a password against its hash."""
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# Bcrypt has a maximum password length of 72 bytes
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plain_password = plain_password[:72]
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return bcrypt.checkpw(plain_password.encode('utf-8'), hashed_password.encode('utf-8'))
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@staticmethod
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def get_password_hash(password: str) -> str:
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"""Generate password hash."""
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# Bcrypt has a maximum password length of 72 bytes
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password = password[:72]
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salt = bcrypt.gensalt()
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hashed = bcrypt.hashpw(password.encode('utf-8'), salt)
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return hashed.decode('utf-8')
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@staticmethod
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def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
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"""Create JWT access token."""
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to_encode = data.copy()
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if expires_delta:
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expire = datetime.utcnow() + expires_delta
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else:
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expire = datetime.utcnow() + timedelta(minutes=settings.security.access_token_expire_minutes)
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to_encode.update({"exp": expire})
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encoded_jwt = jwt.encode(
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to_encode,
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settings.security.secret_key,
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algorithm=settings.security.algorithm
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)
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return encoded_jwt
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@staticmethod
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def verify_token(token: str) -> Optional[dict]:
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"""Verify JWT token."""
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try:
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payload = jwt.decode(
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token,
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settings.security.secret_key,
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algorithms=[settings.security.algorithm]
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)
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return payload
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except jwt.PyJWTError as e:
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import logging
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logging.error(f"Token verification failed: {e}")
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logging.error(f"Token: {token[:50]}...")
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logging.error(f"Secret key: {settings.security.secret_key[:20]}...")
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logging.error(f"Algorithm: {settings.security.algorithm}")
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return None
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@staticmethod
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def authenticate_user(db: Session, username: str, password: str) -> Optional[User]:
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"""Authenticate user with username and password."""
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user = db.query(User).filter(User.username == username).first()
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if not user:
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return None
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if not AuthService.verify_password(password, user.hashed_password):
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return None
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return user
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@staticmethod
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def authenticate_user_by_email(db: Session, email: str, password: str) -> Optional[User]:
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"""Authenticate user with email and password."""
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user = db.query(User).filter(User.email == email).first()
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if not user:
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return None
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if not AuthService.verify_password(password, user.hashed_password):
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return None
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return user
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@staticmethod
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def get_current_user(
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credentials: HTTPAuthorizationCredentials = Depends(security),
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db: Session = Depends(get_db)
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) -> User:
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"""Get current authenticated user."""
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import logging
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from ..core.context import UserContext
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credentials_exception = HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Could not validate credentials",
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headers={"WWW-Authenticate": "Bearer"},
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)
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token = credentials.credentials
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logging.info(f"Received token: {token[:50]}...")
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payload = AuthService.verify_token(token)
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if payload is None:
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logging.error("Token verification failed")
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raise credentials_exception
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logging.info(f"Token payload: {payload}")
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username: str = payload.get("sub")
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if username is None:
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logging.error("No username in token payload")
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raise credentials_exception
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logging.info(f"Looking for user with username: {username}")
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user = db.query(User).filter(User.username == username).first()
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if user is None:
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logging.error(f"User not found with username: {username}")
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raise credentials_exception
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# Set user in context for global access
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UserContext.set_current_user(user)
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logging.info(f"User {user.username} (ID: {user.id}) set in UserContext")
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return user
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@staticmethod
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def get_current_active_user(current_user: User = Depends(get_current_user)) -> User:
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"""Get current active user."""
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if not current_user.is_active:
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raise HTTPException(
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status_code=status.HTTP_400_BAD_REQUEST,
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detail="Inactive user"
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)
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return current_user |