95 lines
3.3 KiB
Python
95 lines
3.3 KiB
Python
from datetime import datetime, timedelta
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from typing import Optional, Union
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from fastapi import Depends, HTTPException, status
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from fastapi.security import OAuth2PasswordBearer
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from jose import JWTError, jwt
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from passlib.context import CryptContext
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from sqlalchemy.orm import Session
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from api.schemas.user import TokenData
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from db.database import get_db
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from db.models import User
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# to get a string like this run: openssl rand -hex 32
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# In production, this should be stored in environment variables
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SECRET_KEY = "09d25e094faa6ca2556c818166b7a9563b93f7099f6f0f4caa6cf63b88e8d3e7" # noqa: S105
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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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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="api/auth/token")
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def verify_password(plain_password: str, hashed_password: str) -> bool:
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"""Verify a password against a hash"""
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return pwd_context.verify(plain_password, hashed_password)
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def get_password_hash(password: str) -> str:
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"""Hash a password"""
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return pwd_context.hash(password)
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def authenticate_user(db: Session, username: str, password: str) -> Union[User, bool]:
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"""Authenticate a user"""
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user = db.query(User).filter(User.username == username).first()
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if not user or not verify_password(password, user.hashed_password):
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return False
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if not user.is_active:
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raise HTTPException(
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status_code=status.HTTP_400_BAD_REQUEST, detail="Inactive user",
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)
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return user
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def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
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"""Create a JWT 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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async def get_current_user(
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token: str = Depends(oauth2_scheme), db: Session = Depends(get_db),
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) -> User:
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"""Get the current user from a JWT token"""
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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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try:
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payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
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username: str = payload.get("sub")
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if username is None:
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raise credentials_exception
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token_data = TokenData(username=username)
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except JWTError as err:
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raise credentials_exception from err
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user = db.query(User).filter(User.username == token_data.username).first()
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if user is None or not user.is_active:
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raise credentials_exception
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return user
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async def get_current_active_user(current_user: User = Depends(get_current_user)) -> User:
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"""Get the current active user"""
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if not current_user.is_active:
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raise HTTPException(status_code=400, detail="Inactive user")
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return current_user
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async def get_current_superuser(current_user: User = Depends(get_current_user)) -> User:
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"""Get the current superuser"""
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if not current_user.is_superuser:
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN, detail="Not enough permissions",
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)
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return current_user
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