82 lines
2.7 KiB
Python
82 lines
2.7 KiB
Python
from datetime import datetime, timedelta
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from typing import Optional
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from jose import JWTError, jwt
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import bcrypt
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from fastapi import Depends, HTTPException, status
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from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
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import os
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# JWT Configuration
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SECRET_KEY = os.getenv("JWT_SECRET_KEY", "your-secret-key-change-this-in-production")
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ALGORITHM = "HS256"
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ACCESS_TOKEN_EXPIRE_MINUTES = 60 * 24 * 7 # 7 days
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# HTTP Bearer token scheme
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security = HTTPBearer()
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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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return bcrypt.checkpw(plain_password.encode('utf-8'), hashed_password.encode('utf-8'))
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def get_password_hash(password: str) -> str:
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"""Hash a password using bcrypt"""
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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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def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
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"""Create a 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=ACCESS_TOKEN_EXPIRE_MINUTES)
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to_encode.update({"exp": expire})
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encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
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return encoded_jwt
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def decode_access_token(token: str) -> dict:
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"""Decode and verify a JWT token"""
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try:
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payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
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return payload
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except JWTError:
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raise 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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async def get_current_user(credentials: HTTPAuthorizationCredentials = Depends(security)) -> dict:
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"""Dependency to get the current authenticated user from JWT token"""
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try:
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token = credentials.credentials
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payload = decode_access_token(token)
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user_id = payload.get("sub")
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if user_id is None:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Could not validate credentials - no user_id",
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headers={"WWW-Authenticate": "Bearer"},
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)
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# Convert to int if it's a string
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if isinstance(user_id, str):
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user_id = int(user_id)
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return {"user_id": user_id, "username": payload.get("username")}
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except Exception as e:
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print(f"Auth error: {e}")
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail=f"Could not validate credentials: {str(e)}",
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headers={"WWW-Authenticate": "Bearer"},
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)
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