ruslan
c3efdc5a8f
5 failed attempts per IP within 5 minutes triggers 15-minute block. Counter resets on successful login. State is per-worker (in-memory).
145 lines
4.3 KiB
Python
145 lines
4.3 KiB
Python
import secrets
|
|
from typing import Optional
|
|
|
|
from fastapi import Depends, HTTPException, Request, status
|
|
from fastapi.responses import RedirectResponse
|
|
from itsdangerous import BadSignature, URLSafeTimedSerializer
|
|
from passlib.context import CryptContext
|
|
from sqlalchemy.orm import Session
|
|
|
|
from config import COOKIE_MAX_AGE, COOKIE_NAME, CSRF_COOKIE
|
|
from database import get_db
|
|
from models import User, UserServiceAccess
|
|
from utils import now_utc
|
|
from sqlalchemy import select
|
|
|
|
import os
|
|
|
|
_SIGNING_KEY = os.getenv("SIGNING_KEY", secrets.token_urlsafe(32))
|
|
serializer = URLSafeTimedSerializer(_SIGNING_KEY, salt="portal-auth")
|
|
pwd_context = CryptContext(schemes=["argon2"], deprecated="auto")
|
|
|
|
|
|
def hash_password(password: str) -> str:
|
|
return pwd_context.hash(password)
|
|
|
|
|
|
def verify_password(password: str, password_hash: str) -> bool:
|
|
return pwd_context.verify(password, password_hash)
|
|
|
|
|
|
def user_is_valid(user: User) -> bool:
|
|
return bool(user.active and user.expires_at > now_utc())
|
|
|
|
|
|
def issue_auth_cookie(response: RedirectResponse, user: User) -> None:
|
|
token = serializer.dumps({"user_id": user.id})
|
|
response.set_cookie(
|
|
key=COOKIE_NAME,
|
|
value=token,
|
|
httponly=True,
|
|
secure=True,
|
|
samesite="strict",
|
|
max_age=COOKIE_MAX_AGE,
|
|
path="/",
|
|
)
|
|
|
|
|
|
def issue_csrf_cookie(response: RedirectResponse) -> str:
|
|
token = secrets.token_urlsafe(24)
|
|
response.set_cookie(
|
|
key=CSRF_COOKIE,
|
|
value=token,
|
|
httponly=False,
|
|
secure=True,
|
|
samesite="lax",
|
|
max_age=COOKIE_MAX_AGE,
|
|
path="/",
|
|
)
|
|
return token
|
|
|
|
|
|
def get_current_user(request: Request, db: Session = Depends(get_db)) -> Optional[User]:
|
|
raw = request.cookies.get(COOKIE_NAME)
|
|
if not raw:
|
|
return None
|
|
try:
|
|
payload = serializer.loads(raw, max_age=COOKIE_MAX_AGE)
|
|
except BadSignature:
|
|
return None
|
|
user = db.get(User, int(payload["user_id"]))
|
|
if not user or not user_is_valid(user):
|
|
return None
|
|
return user
|
|
|
|
|
|
def require_user(user: Optional[User] = Depends(get_current_user)) -> User:
|
|
if not user:
|
|
raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Unauthorized")
|
|
return user
|
|
|
|
|
|
def require_admin(user: User = Depends(require_user)) -> User:
|
|
if not user.is_admin:
|
|
raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="Admin only")
|
|
return user
|
|
|
|
|
|
def validate_csrf(request: Request) -> None:
|
|
cookie = request.cookies.get(CSRF_COOKIE)
|
|
form_val = request.headers.get("X-CSRF-Token")
|
|
if request.headers.get("content-type", "").startswith("application/x-www-form-urlencoded"):
|
|
return
|
|
if not cookie or not form_val or cookie != form_val:
|
|
raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="CSRF failed")
|
|
|
|
|
|
def has_access(db: Session, user_id: int, service_id: int) -> bool:
|
|
q = select(UserServiceAccess).where(
|
|
UserServiceAccess.user_id == user_id,
|
|
UserServiceAccess.service_id == service_id,
|
|
)
|
|
return db.scalar(q) is not None
|
|
|
|
import threading
|
|
import time
|
|
|
|
_login_attempts: dict = {}
|
|
_login_lock = threading.Lock()
|
|
|
|
_LOGIN_MAX_ATTEMPTS = 5
|
|
_LOGIN_WINDOW = 300 # сброс счётчика через 5 минут
|
|
_LOGIN_BLOCK = 900 # блокировка на 15 минут
|
|
|
|
|
|
def check_login_rate_limit(ip: str) -> Optional[float]:
|
|
"""Возвращает blocked_until (time.monotonic) если IP заблокирован, иначе None."""
|
|
now = time.monotonic()
|
|
with _login_lock:
|
|
entry = _login_attempts.get(ip)
|
|
if not entry:
|
|
return None
|
|
if entry["blocked_until"] > now:
|
|
return entry["blocked_until"]
|
|
if now - entry["first"] > _LOGIN_WINDOW:
|
|
del _login_attempts[ip]
|
|
return None
|
|
|
|
|
|
def record_login_failure(ip: str) -> None:
|
|
now = time.monotonic()
|
|
with _login_lock:
|
|
entry = _login_attempts.get(ip)
|
|
if not entry or now - entry["first"] > _LOGIN_WINDOW:
|
|
_login_attempts[ip] = {"count": 1, "first": now, "blocked_until": 0.0}
|
|
entry = _login_attempts[ip]
|
|
else:
|
|
entry["count"] += 1
|
|
if entry["count"] >= _LOGIN_MAX_ATTEMPTS:
|
|
entry["blocked_until"] = now + _LOGIN_BLOCK
|
|
|
|
|
|
def record_login_success(ip: str) -> None:
|
|
with _login_lock:
|
|
_login_attempts.pop(ip, None)
|