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from typing import Optional
from datetime import timedelta, datetime
from pydantic import BaseModel
from jose import JWTError, jwt
from fastapi import Depends, HTTPException, status
from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
from passlib.context import CryptContext
from nacsos_data.models.users import User
from server.data.users import get_user
from server.util.config import settings
from server.util.logging import get_logger
logger = get_logger('nacsos.util.security')
class Token(BaseModel):
access_token: str
token_type: str
class TokenData(BaseModel):
username: Optional[str] = None
pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
oauth2_scheme = OAuth2PasswordBearer(tokenUrl="api/login/token")
def verify_password(plain_password, hashed_password):
return pwd_context.verify(plain_password, hashed_password)
def get_password_hash(password):
return pwd_context.hash(password)
def authenticate_user(username: str, password: str):
user = get_user(username=username)
if not user:
return False
if not verify_password(password, user.password):
return False
return user
def create_access_token(data: dict, expires_delta: Optional[timedelta] = None):
to_encode = data.copy()
if expires_delta:
expire = datetime.utcnow() + expires_delta
else:
expire = datetime.utcnow() + timedelta(minutes=15)
to_encode.update({"exp": expire})
encoded_jwt = jwt.encode(to_encode, settings.SERVER.SECRET_KEY, algorithm=settings.SERVER.HASH_ALGORITHM)
return encoded_jwt
async def get_current_user(token: str = Depends(oauth2_scheme)):
credentials_exception = HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail="Could not validate credentials",
headers={"WWW-Authenticate": "Bearer"},
)
try:
payload = jwt.decode(token, settings.SERVER.SECRET_KEY, algorithms=[settings.SERVER.HASH_ALGORITHM])
username: str = payload.get("sub")
if username is None:
raise credentials_exception
token_data = TokenData(username=username)
except JWTError:
raise credentials_exception
user = get_user(username=token_data.username)
if user is None:
raise credentials_exception
return user
async def get_current_active_user(current_user: User = Depends(get_current_user)) -> User:
if not current_user.is_active:
raise HTTPException(status_code=400, detail="Inactive user")
return current_user
def get_current_active_superuser(current_user: User = Depends(get_current_user)) -> User:
if not current_user.is_superuser:
raise HTTPException(
status_code=400, detail="The user doesn't have enough privileges"
)
return current_user
# def get_current_user(
# db: Session = Depends(get_db), token: str = Depends(reusable_oauth2)
# ) -> models.User:
# try:
# payload = jwt.decode(
# token, settings.SERVER.SECRET_KEY, algorithms=[security.ALGORITHM]
# )
# token_data = schemas.TokenPayload(**payload)
# except (jwt.JWTError, ValidationError):
# raise HTTPException(
# status_code=status.HTTP_403_FORBIDDEN,
# detail="Could not validate credentials",
# )
# user = crud.user.get(db, id=token_data.sub)
# if not user:
# raise HTTPException(status_code=404, detail="User not found")
# return user