143 lines
4.0 KiB
Python
143 lines
4.0 KiB
Python
from datetime import datetime, timedelta
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from typing import List, Union
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from modules.database import col_users
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from modules.app import app
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from fastapi import Depends, HTTPException, Security, status
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from starlette.status import HTTP_204_NO_CONTENT
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from fastapi.security import (
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OAuth2PasswordBearer,
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SecurityScopes,
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)
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from jose import JWTError, jwt
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from passlib.context import CryptContext
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from pydantic import BaseModel, ValidationError
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with open("secret_key", "r", encoding="utf-8") as f:
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SECRET_KEY = f.read()
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ALGORITHM = "HS256"
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ACCESS_TOKEN_EXPIRE_DAYS = 180
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fake_users_db = {
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"johndoe": {
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"user": "johndoe",
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"email": "johndoe@example.com",
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"hash": "$2b$12$EixZaYVK1fsbw1ZfbX3OXePaWxn96p36WQoeG6Lruj3vjPGga31lW",
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"disabled": False,
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},
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"alice": {
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"user": "alice",
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"email": "alicechains@example.com",
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"hash": "$2b$12$gSvqqUPvlXP2tfVFaWK1Be7DlH.PKZbv5H8KnzzVgXXbVxpva.pFm",
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"disabled": True,
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},
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}
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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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user: Union[str, None] = None
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scopes: List[str] = []
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class User(BaseModel):
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user: str
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email: Union[str, None] = None
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disabled: Union[bool, None] = None
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class UserInDB(User):
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hash: str
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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oauth2_scheme = OAuth2PasswordBearer(
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tokenUrl="token",
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scopes={
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"me": "Get current user's data.",
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"list": "List albums and images.",
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"read": "View albums and images.",
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"write": "Manage albums and images."},
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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(user: str):
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found_user = col_users.find_one( {"user": user} )
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return UserInDB(user=found_user["user"], email=found_user["email"], disabled=found_user["disabled"], hash=found_user["hash"])
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def authenticate_user(user_name: str, password: str):
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user = get_user(user_name)
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if not user:
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return False
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if not verify_password(password, user.hash):
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return False
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return user
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def create_access_token(data: dict, expires_delta: Union[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(days=ACCESS_TOKEN_EXPIRE_DAYS)
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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(
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security_scopes: SecurityScopes, token: str = Depends(oauth2_scheme)
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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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try:
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payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
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user: str = payload.get("sub")
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if user 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, user=user)
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except (JWTError, ValidationError):
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raise credentials_exception
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user = get_user(user=token_data.user)
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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: User = Security(get_current_user, scopes=["me"])
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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 |