124 lines
4.2 KiB
Python
124 lines
4.2 KiB
Python
from typing import Annotated
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from datetime import datetime, timedelta, timezone
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from fastapi import APIRouter, HTTPException, Depends, status
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from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
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from sqlmodel import Session, select
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from pwdlib import PasswordHash
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import jwt
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from jwt.exceptions import InvalidTokenError
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from ..model.models import UserDB, Token, TokenData, UserCreate
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from ..services.database import *
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import secrets, string
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SECRET_KEY = "8b14d0b447bff7efa24d5019cc59a999786e31f6f865173bbd642bf18de5ad85" #Encrypt and change later or store in env file or somehthing
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ALGORITHM = "HS256"
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ACCESS_TOKEN_EXPIRE_MINUTES = 30
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")
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token_router = APIRouter(tags=["Token"])
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password_hash = PasswordHash.recommended()
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def verify_password(plain_password, hashed_password):
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return password_hash.verify(plain_password, hashed_password)
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def get_password_hash(password):
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return password_hash.hash(password)
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def get_user(db, username: str):
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user = db.exec(select(UserDB).where(UserDB.name == username)).first()
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return user
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def authenticate_user(db, username: str, password: str):
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user = get_user(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.passwordhash):
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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.now(timezone.utc) + expires_delta
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else:
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expire = datetime.now(timezone.utc) + 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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def get_current_user(
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token: Annotated[str, Depends(oauth2_scheme)],
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db: Session = Depends(get_session),
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):
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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 = 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 InvalidTokenError:
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raise credentials_exception
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user = get_user(db, 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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def auth_is_admin(
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token: str = Depends(oauth2_scheme),
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db: Session = Depends(get_session),
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):
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user = get_current_user(token=token, db=db)
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if not user.is_admin:
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN,
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detail="Not authorized to perform this action",
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headers={"WWW-Authenticate": "Bearer"}
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)
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return True
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def create_first_user():
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print("Checking for admin user")
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with Session(engine) as db:
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admin_user = db.exec(select(UserDB)).first()
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if admin_user is None:
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password = ''.join(secrets.choice(string.digits) for i in range(8))
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print("Creating first admin user with password", password)
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user = UserDB(
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name="admin",
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passwordhash=get_password_hash(password),
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is_admin=True
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)
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return add_and_refresh(db, user)
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print(f"Admin user already exists: {admin_user.name}")
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@token_router.post("/token")
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def login_for_access_token(
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form_data: Annotated[OAuth2PasswordRequestForm, Depends()],
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db: Session = Depends(get_session)
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) -> Token:
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user = authenticate_user(db, form_data.username, form_data.password)
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if not user:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Incorrect username or pw",
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headers={"WWW-Authenticate": "Bearer"}
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)
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access_token_expires = timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
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access_token = create_access_token(
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data={"sub": user.name}, expires_delta=access_token_expires
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)
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return Token(access_token=access_token, token_type="bearer")
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@token_router.get("/test/login")
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def test_login(
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current_user: Annotated[UserDB, Depends(get_current_user)]
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) -> UserDB:
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return current_user |