300 lines
9.2 KiB
Python
300 lines
9.2 KiB
Python
from datetime import timedelta, timezone, datetime
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from typing import Annotated
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from fastapi import Depends, HTTPException, Request, Response, status
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from fastapi.responses import PlainTextResponse
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from pydantic import BaseModel, ValidationError
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import jwt
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from jwt.exceptions import ExpiredSignatureError, InvalidTokenError
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from sqlmodel import Session, select
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from db import TokenDB, engine, Player
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from fastapi.security import (
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OAuth2PasswordBearer,
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OAuth2PasswordRequestForm,
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SecurityScopes,
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)
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from pydantic_settings import BaseSettings, SettingsConfigDict
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from passlib.context import CryptContext
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from sqlalchemy.exc import OperationalError
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class Config(BaseSettings):
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secret_key: str = ""
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access_token_expire_minutes: int = 15
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model_config = SettingsConfigDict(
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env_file=".env", env_file_encoding="utf-8", extra="ignore"
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)
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config = Config()
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class Token(BaseModel):
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access_token: str
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class TokenData(BaseModel):
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username: str | None = None
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scopes: list[str] = []
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pwd_context = CryptContext(schemes=["argon2"], deprecated="auto")
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class CookieOAuth2(OAuth2PasswordBearer):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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async def __call__(self, request: Request):
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cookie_token = request.cookies.get("access_token")
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if cookie_token:
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return cookie_token
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else:
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header_token = await super().__call__(request)
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if header_token:
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return header_token
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else:
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raise HTTPException(status_code=401)
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oauth2_scheme = CookieOAuth2(
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tokenUrl="api/token",
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scopes={
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"analysis": "Access the results.",
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"admin": "Maintain DB etc.",
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},
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)
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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(username: str | None):
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if username:
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try:
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with Session(engine) as session:
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return session.exec(
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select(Player).where(Player.username == username)
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).one_or_none()
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except OperationalError:
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return
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def authenticate_user(username: str, password: str):
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user = get_user(username)
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if not user:
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return False
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if not verify_password(password, user.hashed_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.now(timezone.utc) + expires_delta
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else:
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expire = datetime.now(timezone.utc) + timedelta(
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minutes=config.access_token_expire_minutes
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)
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to_encode.update({"exp": expire})
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encoded_jwt = jwt.encode(to_encode, config.secret_key, algorithm="HS256")
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return encoded_jwt
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async def get_current_user(
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token: Annotated[str, Depends(oauth2_scheme)],
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security_scopes: SecurityScopes,
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):
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if security_scopes.scopes:
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authenticate_value = f'Bearer scope="{security_scopes.scope_str}"'
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else:
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authenticate_value = "Bearer"
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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": authenticate_value},
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)
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# access_token = request.cookies.get("access_token")
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access_token = token
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if not access_token:
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raise credentials_exception
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try:
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payload = jwt.decode(access_token, config.secret_key, algorithms=["HS256"])
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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_scopes = payload.get("scopes", [])
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token_data = TokenData(username=username, scopes=token_scopes)
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except ExpiredSignatureError:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Access token expired",
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headers={"WWW-Authenticate": authenticate_value},
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)
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except (InvalidTokenError, ValidationError):
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raise credentials_exception
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user = get_user(username=token_data.username)
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if user is None:
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raise credentials_exception
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for scope in security_scopes.scopes:
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if scope not in token_data.scopes:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Not enough permissions",
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headers={"WWW-Authenticate": authenticate_value},
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)
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return user
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async def get_current_active_user(
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current_user: Annotated[Player, Depends(get_current_user)],
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):
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if current_user.disabled:
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raise HTTPException(status_code=400, detail="Inactive user")
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return current_user
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async def login_for_access_token(
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form_data: Annotated[OAuth2PasswordRequestForm, Depends()], response: Response
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) -> Token:
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user = authenticate_user(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 password",
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headers={"WWW-Authenticate": "Bearer"},
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)
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allowed_scopes = set(user.scopes.split())
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requested_scopes = set(form_data.scopes)
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access_token = create_access_token(
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data={"sub": user.username, "scopes": list(allowed_scopes)}
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)
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response.set_cookie(
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"access_token",
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value=access_token,
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httponly=True,
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samesite="strict",
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max_age=config.access_token_expire_minutes * 60,
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)
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return Token(access_token=access_token)
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async def logout(response: Response):
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response.set_cookie("access_token", "", expires=0, httponly=True, samesite="strict")
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return {"message": "Successfully logged out"}
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def generate_one_time_token(username):
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user = get_user(username)
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if user:
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expire = timedelta(days=7)
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token = create_access_token(
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data={"sub": username, "name": user.display_name},
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expires_delta=expire,
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)
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return token
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class FirstPassword(BaseModel):
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token: str
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password: str
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async def set_first_password(req: FirstPassword):
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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 token",
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)
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with Session(engine) as session:
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token_in_db = session.exec(
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select(TokenDB)
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.where(TokenDB.token == req.token)
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.where(TokenDB.used == False)
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).one_or_none()
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if token_in_db:
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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 token",
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)
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try:
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payload = jwt.decode(req.token, config.secret_key, algorithms=["HS256"])
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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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except ExpiredSignatureError:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Access token expired",
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)
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except (InvalidTokenError, ValidationError):
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raise credentials_exception
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user = get_user(username)
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if user:
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user.hashed_password = get_password_hash(req.password)
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session.add(user)
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token_in_db.used = True
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session.add(token_in_db)
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session.commit()
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return Response(
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"Password set successfully", status_code=status.HTTP_200_OK
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)
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elif session.exec(
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select(TokenDB)
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.where(TokenDB.token == req.token)
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.where(TokenDB.used == True)
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).one_or_none():
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Token already used",
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)
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else:
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raise credentials_exception
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class ChangedPassword(BaseModel):
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current_password: str
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new_password: str
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async def change_password(
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request: ChangedPassword,
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user: Annotated[Player, Depends(get_current_active_user)],
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):
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if (
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request.new_password
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and user.hashed_password
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and verify_password(request.current_password, user.hashed_password)
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):
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with Session(engine) as session:
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user.hashed_password = get_password_hash(request.new_password)
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session.add(user)
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session.commit()
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return PlainTextResponse(
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"Password changed successfully",
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status_code=status.HTTP_200_OK,
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media_type="text/plain",
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)
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else:
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raise HTTPException(
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status_code=status.HTTP_400_BAD_REQUEST,
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detail="Wrong password",
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)
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async def read_player_me(
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current_user: Annotated[Player, Depends(get_current_active_user)],
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):
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return current_user.model_dump(exclude={"hashed_password", "disabled"})
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async def read_own_items(
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current_user: Annotated[Player, Depends(get_current_active_user)],
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):
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return [{"item_id": "Foo", "owner": current_user.username}]
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