Mawoka
148 lines
4.7 KiB
Python
148 lines
4.7 KiB
Python
from datetime import timedelta
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from typing import Dict
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from typing import Optional
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from typing import Union
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from fastapi import Depends
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from fastapi import HTTPException
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from fastapi import Request
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from fastapi import status
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from fastapi.openapi.models import OAuthFlows as OAuthFlowsModel
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from fastapi.security import OAuth2
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from fastapi.security.utils import get_authorization_scheme_param
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from jose import JWTError, jwt
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from passlib.hash import argon2
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from classquiz.cache import get_cache
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from classquiz.config import settings
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from datetime import datetime
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from classquiz.db.models import User, TokenData
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settings = settings()
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# pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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pwd_context = argon2
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ALGORITHM = "HS256"
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ACCESS_TOKEN_EXPIRE_MINUTES = settings.access_token_expire_minutes
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class OAuth2PasswordBearerWithCookie(OAuth2):
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def __init__(
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self,
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tokenUrl: str,
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scheme_name: Optional[str] = None,
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scopes: Optional[Dict[str, str]] = None,
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auto_error: bool = True,
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):
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if not scopes:
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scopes = {}
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flows = OAuthFlowsModel(password={"tokenUrl": tokenUrl, "scopes": scopes})
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super().__init__(flows=flows, scheme_name=scheme_name, auto_error=auto_error)
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async def __call__(self, request: Request) -> Optional[str]:
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authorization: str = request.cookies.get("access_token") # changed to accept access token from httpOnly Cookie
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scheme, param = get_authorization_scheme_param(authorization)
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if not authorization or scheme.lower() != "bearer":
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if self.auto_error:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Not authenticated",
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headers={"WWW-Authenticate": "Bearer"},
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)
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else:
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return None
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return param
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oauth2_scheme = OAuth2PasswordBearerWithCookie(tokenUrl="/api/v1/users/token/cookie")
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def verify_password(plain_password: str, hashed_password: str) -> bool:
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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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return pwd_context.hash(password)
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async def get_user_from_mail(email: str) -> Union[User, None]:
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return await get_cache(criteria="email", content=email)
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async def get_user_from_username(username: str) -> Union[User, None]:
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return await get_cache(criteria="username", content=username)
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async def get_user_from_id(id: str) -> Union[User, None]:
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return await get_cache(criteria="id", content=id)
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async def authenticate_user(email: str, password: str) -> Union[User, bool]:
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user = await get_user_from_mail(email)
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if not user:
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return False
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if not verify_password(password, user.password):
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return False
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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=15)
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to_encode.update({"exp": expire})
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encoded_jwt = jwt.encode(to_encode, settings.secret_key, algorithm=ALGORITHM)
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return encoded_jwt
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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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async def get_current_user(token: str = Depends(oauth2_scheme)):
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try:
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payload = jwt.decode(token, settings.secret_key, algorithms=[ALGORITHM])
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email: str = payload.get("sub")
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if email is None:
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raise credentials_exception
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token_data = TokenData(email=email)
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except JWTError:
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raise credentials_exception
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user = await get_user_from_mail(email=token_data.email)
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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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async def get_current_user_optional(token: str = Depends(oauth2_scheme)) -> User | None:
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try:
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payload = jwt.decode(token, settings.secret_key, algorithms=[ALGORITHM])
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email: str = payload.get("sub")
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if email is None:
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return None
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token_data = TokenData(email=email)
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except JWTError:
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return None
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user = await get_user_from_mail(email=token_data.email)
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if user is None:
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return None
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return user
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async def check_token(token: str = Depends(oauth2_scheme)):
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try:
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payload = jwt.decode(token, settings.secret_key, algorithms=[ALGORITHM])
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email: str = payload.get("sub")
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if email is None:
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raise credentials_exception
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token_data = TokenData(email=email)
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except JWTError:
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raise credentials_exception
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return token_data.email
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