72 lines
2.3 KiB
Python
72 lines
2.3 KiB
Python
"""Authentication utilities."""
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import os
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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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from passlib.context import CryptContext
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from fastapi import Depends, HTTPException, status
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from fastapi.security import HTTPBearer, HTTPAuthCredentials
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from sqlalchemy.orm import Session
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from app.database import get_db
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from app.models import User
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# Security configuration
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SECRET_KEY = os.getenv("SECRET_KEY", "your-secret-key-change-in-production")
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ALGORITHM = "HS256"
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ACCESS_TOKEN_EXPIRE_MINUTES = 30
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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security = HTTPBearer()
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def hash_password(password: str) -> str:
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"""Hash a password."""
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return pwd_context.hash(password)
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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 pwd_context.verify(plain_password, hashed_password)
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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 get_current_user(
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credentials: HTTPAuthCredentials = Depends(security),
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db: Session = Depends(get_db)
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) -> User:
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"""Get the current authenticated user."""
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token = credentials.credentials
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try:
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payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
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user_id: int = 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="Invalid authentication credentials",
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)
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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="Invalid authentication credentials",
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)
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user = db.query(User).filter(User.id == user_id).first()
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if user is None:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="User not found",
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)
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return user
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