lookyloo/website/web/helpers.py

116 lines
3.8 KiB
Python

#!/usr/bin/env python3
from __future__ import annotations
import hashlib
import json
import os
import re
from functools import lru_cache
from pathlib import Path
import flask_login # type: ignore[import-untyped]
from flask import Request
from werkzeug.security import generate_password_hash
from lookyloo import Lookyloo
from lookyloo.default import get_config, get_homedir
__global_lookyloo_instance = None
def get_lookyloo_instance() -> Lookyloo:
global __global_lookyloo_instance
if __global_lookyloo_instance is None:
__global_lookyloo_instance = Lookyloo()
return __global_lookyloo_instance
def src_request_ip(request: Request) -> str | None:
# NOTE: X-Real-IP is the IP passed by the reverse proxy in the headers.
real_ip = request.headers.get('X-Real-IP')
if not real_ip:
real_ip = request.remote_addr
return real_ip
class User(flask_login.UserMixin): # type: ignore[misc]
pass
def load_user_from_request(request: Request) -> User | None:
api_key = request.headers.get('Authorization')
if not api_key:
return None
user = User()
api_key = api_key.strip()
keys_table = build_keys_table()
if api_key in keys_table:
user.id = keys_table[api_key]
return user
return None
def is_valid_username(username: str) -> bool:
return bool(re.match("^[A-Za-z0-9]+$", username))
@lru_cache(64)
def build_keys_table() -> dict[str, str]:
keys_table = {}
for username, authstuff in build_users_table().items():
if 'authkey' in authstuff:
keys_table[authstuff['authkey']] = username
return keys_table
@lru_cache(64)
def get_users() -> dict[str, str | list[str]]:
try:
# Use legacy user mgmt, no need to print a warning, and it will fail on new install.
return get_config('generic', 'cache_clean_user', quiet=True)
except Exception:
return get_config('generic', 'users')
@lru_cache(64)
def build_users_table() -> dict[str, dict[str, str]]:
users_table: dict[str, dict[str, str]] = {}
for username, authstuff in get_users().items():
if not is_valid_username(username):
raise Exception('Invalid username, can only contain characters and numbers.')
if isinstance(authstuff, str):
# just a password, make a key
users_table[username] = {}
users_table[username]['password'] = generate_password_hash(authstuff)
users_table[username]['authkey'] = hashlib.pbkdf2_hmac('sha256', get_secret_key(),
authstuff.encode(),
100000).hex()
elif isinstance(authstuff, list) and len(authstuff) == 2:
if isinstance(authstuff[0], str) and isinstance(authstuff[1], str) and len(authstuff[1]) == 64:
users_table[username] = {}
users_table[username]['password'] = generate_password_hash(authstuff[0])
users_table[username]['authkey'] = authstuff[1]
else:
raise Exception('User setup invalid. Must be "username": "password" or "username": ["password", "token 64 chars (sha256)"]')
return users_table
@lru_cache(64)
def get_secret_key() -> bytes:
secret_file_path: Path = get_homedir() / 'secret_key'
if not secret_file_path.exists() or secret_file_path.stat().st_size < 64:
if not secret_file_path.exists() or secret_file_path.stat().st_size < 64:
with secret_file_path.open('wb') as f:
f.write(os.urandom(64))
with secret_file_path.open('rb') as f:
return f.read()
@lru_cache(64)
def sri_load() -> dict[str, dict[str, str]]:
with (get_homedir() / 'website' / 'web' / 'sri.txt').open() as f:
return json.load(f)