153 lines
4.3 KiB
Python
153 lines
4.3 KiB
Python
import uuid
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from datetime import datetime, timedelta
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from typing import List, Optional
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from fastapi import Depends, HTTPException, Security, status
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from fastapi.security import OAuth2PasswordBearer, SecurityScopes
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from jose import jwt
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from jose.exceptions import ExpiredSignatureError
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from jwt import PyJWTError
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from pydantic import BaseModel, ValidationError
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from sqlalchemy.orm import Session
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from ..core.config import settings
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from ..db.session import SessionLocal
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from ..models.auth import Client
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from ..models.auth import User as UserModel
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# to get a string like this run:
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from ..schemas.auth import UserToken
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/token", scopes={})
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class Token(BaseModel):
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access_token: str
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token_type: str
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class TokenData(BaseModel):
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username: str = None
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scopes: List[str] = []
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def f7(seq):
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seen = set()
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seen_add = seen.add
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return [x for x in seq if not (x in seen or seen_add(x))]
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# Dependency
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def get_db():
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try:
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db = SessionLocal()
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yield db
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finally:
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db.close()
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def create_access_token(*, data: dict, expires_delta: 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(
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to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM
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)
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return encoded_jwt
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def get_user(username: str, id_: str, locked_out: bool, scopes: List[str]) -> UserToken:
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return UserToken(
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id_=uuid.UUID(id_),
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name=username,
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locked_out=locked_out,
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password="",
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permissions=scopes,
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)
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def authenticate_user(
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username: str, password: str, client_id: Optional[int], otp: int, db: Session
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) -> Optional[UserModel]:
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user = UserModel.auth(username, password, db)
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return user
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def client_allowed(
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user: UserModel, client_id: int, otp: Optional[int] = None, db: Session = None
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) -> (bool, int):
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client = (
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db.query(Client).filter(Client.code == client_id).first() if client_id else None
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)
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allowed = "clients" in set(
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[p.name.replace(" ", "-").lower() for r in user.roles for p in r.permissions]
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)
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if allowed:
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return True, 0
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elif client is None:
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client = Client.create(db)
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return False, client.code
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elif client.enabled:
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return True, client.code
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elif client.otp == otp:
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client.otp = None
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client.enabled = True
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return True, client.code
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else:
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return False, client.code
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async def get_current_user(
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security_scopes: SecurityScopes,
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token: str = Depends(oauth2_scheme),
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) -> UserToken:
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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 = f"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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try:
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payload = jwt.decode(
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token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM]
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)
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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(scopes=token_scopes, username=username)
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except (PyJWTError, ValidationError, ExpiredSignatureError):
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raise credentials_exception
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user = get_user(
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username=token_data.username,
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id_=payload.get("userId", None),
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locked_out=payload.get("lockedOut", True),
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scopes=token_scopes,
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)
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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: UserToken = Security(get_current_user, scopes=["authenticated"])
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) -> UserToken:
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if current_user.locked_out:
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raise HTTPException(status_code=400, detail="Inactive user")
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return current_user
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