88 lines
3.2 KiB
Python
88 lines
3.2 KiB
Python
from __future__ import annotations
|
|
|
|
import os
|
|
import secrets
|
|
import time
|
|
from datetime import datetime, timedelta, timezone
|
|
from typing import Any
|
|
|
|
from fastapi import Depends, HTTPException, Request, status
|
|
from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
|
|
import bcrypt
|
|
from jose import JWTError, jwt
|
|
|
|
ADMIN_USERNAME = os.getenv("ADMIN_USERNAME", "admin")
|
|
ADMIN_PASSWORD_HASH = os.getenv("ADMIN_PASSWORD_HASH", "")
|
|
ADMIN_JWT_SECRET = os.getenv("ADMIN_JWT_SECRET", "")
|
|
ADMIN_JWT_EXPIRE_HOURS = int(os.getenv("ADMIN_JWT_EXPIRE_HOURS", "8"))
|
|
ADMIN_LOGIN_MAX_ATTEMPTS = int(os.getenv("ADMIN_LOGIN_MAX_ATTEMPTS", "5"))
|
|
ADMIN_LOGIN_WINDOW_SECONDS = int(os.getenv("ADMIN_LOGIN_WINDOW_SECONDS", "300"))
|
|
|
|
bearer_scheme = HTTPBearer(auto_error=False)
|
|
|
|
_login_attempts: dict[str, list[float]] = {}
|
|
|
|
|
|
def admin_configured() -> bool:
|
|
return bool(ADMIN_PASSWORD_HASH and ADMIN_JWT_SECRET and len(ADMIN_JWT_SECRET) >= 32)
|
|
|
|
|
|
def verify_password(plain_password: str, password_hash: str) -> bool:
|
|
try:
|
|
return bcrypt.checkpw(plain_password.encode("utf-8"), password_hash.encode("utf-8"))
|
|
except (ValueError, TypeError):
|
|
return False
|
|
|
|
|
|
def hash_password(plain_password: str) -> str:
|
|
return bcrypt.hashpw(plain_password.encode("utf-8"), bcrypt.gensalt()).decode("utf-8")
|
|
|
|
|
|
def _client_key(request: Request) -> str:
|
|
return request.client.host if request.client else "unknown"
|
|
|
|
|
|
def check_login_rate_limit(request: Request) -> None:
|
|
key = _client_key(request)
|
|
now = time.time()
|
|
attempts = [ts for ts in _login_attempts.get(key, []) if now - ts < ADMIN_LOGIN_WINDOW_SECONDS]
|
|
if len(attempts) >= ADMIN_LOGIN_MAX_ATTEMPTS:
|
|
raise HTTPException(status_code=429, detail="Too many login attempts. Try again later.")
|
|
_login_attempts[key] = attempts
|
|
|
|
|
|
def record_failed_login(request: Request) -> None:
|
|
key = _client_key(request)
|
|
_login_attempts.setdefault(key, []).append(time.time())
|
|
|
|
|
|
def create_access_token(username: str) -> str:
|
|
expire = datetime.now(timezone.utc) + timedelta(hours=ADMIN_JWT_EXPIRE_HOURS)
|
|
payload = {"sub": username, "exp": expire, "scope": "admin"}
|
|
return jwt.encode(payload, ADMIN_JWT_SECRET, algorithm="HS256")
|
|
|
|
|
|
def decode_access_token(token: str) -> dict[str, Any]:
|
|
return jwt.decode(token, ADMIN_JWT_SECRET, algorithms=["HS256"])
|
|
|
|
|
|
async def require_admin(
|
|
request: Request,
|
|
credentials: HTTPAuthorizationCredentials | None = Depends(bearer_scheme),
|
|
) -> dict[str, Any]:
|
|
if not admin_configured():
|
|
raise HTTPException(status_code=503, detail="Admin access is not configured")
|
|
if credentials is None or credentials.scheme.lower() != "bearer":
|
|
raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Missing bearer token")
|
|
try:
|
|
payload = decode_access_token(credentials.credentials)
|
|
except JWTError as exc:
|
|
raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid or expired token") from exc
|
|
if payload.get("sub") != ADMIN_USERNAME or payload.get("scope") != "admin":
|
|
raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid token scope")
|
|
return payload
|
|
|
|
|
|
def generate_secret(length: int = 48) -> str:
|
|
return secrets.token_urlsafe(length)
|