84 lines
2.3 KiB
Python
84 lines
2.3 KiB
Python
from datetime import datetime, timedelta
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from typing import Optional
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from jose import JWTError, jwt
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from pydantic import BaseModel
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from fastapi import Depends, HTTPException, status
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from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
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import pam
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from app.core.config import settings
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class TokenData(BaseModel):
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username: str
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exp: datetime
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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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username: str
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class User(BaseModel):
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username: str
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is_authenticated: bool = True
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def authenticate_user(username: str, password: str) -> Optional[User]:
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"""
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Authentifie un utilisateur via PAM (Pluggable Authentication Module)
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Validé contre le système Debian/Linux
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"""
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try:
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pam_auth = pam.pam()
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if pam_auth.authenticate(username, password):
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return User(username=username)
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return None
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except Exception as e:
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print(f"Erreur PAM: {e}")
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return None
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def create_access_token(username: str, expires_delta: Optional[timedelta] = None) -> str:
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"""Crée un token JWT"""
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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(
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minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES
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)
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to_encode = {"sub": username, "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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security = HTTPBearer()
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async def get_current_user(credentials: HTTPAuthorizationCredentials = Depends(security)) -> User:
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"""
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Valide le token JWT et retourne l'utilisateur actuel
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"""
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credential_exception = HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Impossible de valider les credentials",
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headers={"WWW-Authenticate": "Bearer"},
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)
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try:
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token = credentials.credentials
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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 credential_exception
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token_data = TokenData(username=username, exp=payload.get("exp"))
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except JWTError:
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raise credential_exception
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return User(username=token_data.username)
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