60 lines
2.1 KiB
Python
60 lines
2.1 KiB
Python
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from datetime import datetime, timedelta
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from typing import Optional
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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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import bcrypt
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from .schemas import TokenData
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from .settings import settings
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from .models import User
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")
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def verify_password(plain_password, hashed_password):
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password_bytes = plain_password[:72].encode('utf-8')
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hashed_bytes = hashed_password.encode('utf-8') if isinstance(hashed_password, str) else hashed_password
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return bcrypt.checkpw(password_bytes, hashed_bytes)
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def get_password_hash(password):
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password_bytes = password[:72].encode('utf-8')
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return bcrypt.hashpw(password_bytes, bcrypt.gensalt()).decode('utf-8')
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async def authenticate_user(username: str, password: str):
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user = await User.get_or_none(username=username)
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if not user:
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return None
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if not verify_password(password, user.hashed_password):
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return None
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return user
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def create_access_token(data: dict, expires_delta: Optional[timedelta] = None):
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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.ACCESS_TOKEN_EXPIRE_MINUTES)
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to_encode.update({"exp": expire})
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encoded_jwt = jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)
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return encoded_jwt
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async def get_current_user(token: str = Depends(oauth2_scheme)):
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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, settings.SECRET_KEY, algorithms=[settings.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:
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raise credentials_exception
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user = await User.get_or_none(username=token_data.username)
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if user is None:
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raise credentials_exception
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return user
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