83 lines
2.9 KiB
Python
83 lines
2.9 KiB
Python
from fastapi import APIRouter, HTTPException, status, Depends
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from fastapi.security import OAuth2PasswordRequestForm
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from fastapi.security import OAuth2AuthorizationCodeBearer
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from app.schemas import loginToken, loginData
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import jwt
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from datetime import datetime, timedelta, timezone
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# Define an APIRouter for authentication
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router = APIRouter()
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mock_users_db = {
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"testuser": {
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"username": "testuser",
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"password": "testpass", # In a real scenario, store the hash of the password
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"pgroups": [20000, 20001, 20003],
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}
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}
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# https://fastapi.tiangolo.com/tutorial/security/oauth2-jwt/#hash-and-verify-the-passwords
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# SECRET_KEY taken from FastAPI documentation, so not that secret :D
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# openssl rand -hex 32
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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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oauth2_scheme = OAuth2AuthorizationCodeBearer(authorizationUrl="/login", tokenUrl="/token/login")
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def create_access_token(data: dict) -> str:
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to_encode = data.copy()
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expire = datetime.now(timezone.utc) + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
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to_encode.update({"exp": expire})
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return jwt.encode(to_encode, SECRET_KEY, algorithm="HS256")
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async def get_current_user(token: str = Depends(oauth2_scheme)) -> loginData:
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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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token_expired_exception = HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Token expired",
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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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pgroups = payload.get("pgroups")
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if username is None:
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raise credentials_exception
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token_data = loginData(username=username, pgroups=pgroups)
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except jwt.ExpiredSignatureError:
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raise token_expired_exception
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except jwt.InvalidTokenError:
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raise credentials_exception
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return token_data
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@router.post("/token/login", response_model=loginToken)
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async def login(form_data: OAuth2PasswordRequestForm = Depends()):
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user = mock_users_db.get(form_data.username)
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if user is None or user["password"] != form_data.password:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Incorrect username or password",
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headers={"WWW-Authenticate": "Bearer"},
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)
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# Create token
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access_token = create_access_token(
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data={"sub": user["username"], "pgroups": user["pgroups"]}
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)
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return loginToken(access_token=access_token, token_type="bearer")
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@router.get("/protected-route")
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async def read_protected_data(current_user: loginData = Depends(get_current_user)):
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return {"username": current_user.username, "pgroups": current_user.pgroups}
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