75 lines
2.5 KiB
Python
75 lines
2.5 KiB
Python
from datetime import datetime, timedelta
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from typing import Annotated
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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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fake_users = [
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# password foo
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{'id': 1, 'username': 'admin', 'password': '$2b$12$N.i74Kle18n5Toxhas.rVOjZreVC2WM34fCidNDyhSNgxVlbKwX7i',
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'permissions': ['items:read', 'items:write', 'users:read', 'users:write']
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},
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# password bar
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{'id': 2, 'username': 'client', 'password': '$2b$12$KUgpw1m0LF/s9NS1ZB5rRO2cA5D13MqRm56ab7ik2ixftXW/aqEyq',
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'permissions': ['items:read']}
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]
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SECRET_KEY = "09d25e094faa6ca2556c818166b7a9563b93f7099f6f0f4caa6cf63b88e8d3e7"
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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="token")
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def verify_password(plain_password, hashed_password):
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return pwd_context.verify(plain_password, hashed_password)
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def get_password_hash(password):
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return pwd_context.hash(password)
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def get_user(db, username: str):
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for user in db:
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if username == user.username:
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return UserInDB(**user)
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def authenticate_user(fake_db, username: str, password: str):
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user = get_user(fake_db, username)
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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: timedelta | None = 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, SECRET_KEY, algorithm=ALGORITHM)
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return encoded_jwt
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async def get_current_user(token: Annotated[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, 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:
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raise credentials_exception
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user = get_user(fake_users, 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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