Archived
snowy-yang
f0de0b65b1
为什么：登录是全部拒绝路径最密的端点（超长密码/锁定/密码错/封禁/ 禁用/管理员无邮箱/异地封禁七道闸），90 行单函数把「身份解析、锁定 计数、状态闸、2FA 转票据、会话建立」五件事揉在一个 try 里，改任何 一道闸都要在嵌套分支里核对上下文。 拆出五个成员（顺序 = 原执行顺序，逐条语义对应）： - _resolve_login_identity：邮箱→账号解析 + 锁定键（保留两处判定 差异：锁定键用真值判断，verify_name 用 is not None——历史口径， 契约测试分别钉住） - _allow_login_attempt：锁定闸 + 一次性审计日志（锁定周期内不重复落） - _check_account_status：封禁（原因落日志）/禁用，通过返回 None - _admin_two_factor_response：2FA 转票据，未绑定邮箱 fail-closed - _user_session_response：login_seq 顶号 + 异地多省封禁闸（封禁时 再递增一次顶掉在途会话）+ Cookie 签发 先写测试后动代码：新增 tests/test_login_flow.py 9 例，在未改动实现上 一次跑绿，覆盖此前零测试的路径——超长密码不碰 PBKDF2（monkeypatch verify_login 断言不被调用）、邮箱登录按归一化地址锁定、锁定日志幂等、 封禁/禁用文案、管理员 fail-closed、异地封禁双递增、非预期异常 500。 门禁：ruff 全过 · pyright 0/0 · pytest 348 passed（339→348）。
335 lines
14 KiB
Python
335 lines
14 KiB
Python
# -*- coding: utf-8 -*-
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"""认证操作端点。
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端点：
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- POST /api/v1/auth/logout ↔ Flask /auth/logout（顶号：递增 login_seq + 删 Cookie）
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- POST /api/v1/auth/heartbeat ↔ Flask /auth/heartbeat
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- POST /api/v1/auth/ann_seen ↔ Flask /auth/ann_seen
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- POST /api/v1/auth/login ↔ Flask /auth/login（密码校验 + 失败锁定 + 管理员 2FA 转票据）
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设计：
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- 登录失败锁定与管理员 2FA 票据表**复用 web.auth_state 的模块级状态**，全进程共享同一份
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计数/票据，避免「换个框架打就绕过锁定」。
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- 密码校验（PBKDF2，10 万次迭代，CPU 密集）与库操作经 asyncio.to_thread 执行，
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不阻塞事件循环。
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- 会话 Cookie 由 core.session 签发（沿用同一格式与密钥，存量会话继续有效），删 Cookie 亦同口径。
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"""
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import asyncio
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import os
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import time
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from typing import Annotated
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from fastapi import APIRouter, Depends, Request
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from fastapi.responses import JSONResponse
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import auth_system as auth
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import web.deps as deps
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from core import db, repo
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from core import session as cs
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from web import ratelimit
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from web.deps import SiteUser, current_user
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from web.request_utils import (
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request_data as _request_data,
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)
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from web.response import error, success
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from web.serializers import format_credits as _format_credits
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from web.serializers import user_public as _user_public
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router = APIRouter()
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SESSION_COOKIE = cs.COOKIE_NAME
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_SESSION_MAX_AGE = cs.SESSION_MAX_AGE
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def _cookie_kwargs() -> dict:
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secure = os.environ.get('ENABLE_SECURE_COOKIE', '').strip().lower() in ('1', 'true', 'yes')
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return {'max_age': _SESSION_MAX_AGE, 'httponly': True, 'samesite': 'lax',
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'path': '/', 'secure': secure}
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def _login_response(payload: dict, message: str, uid: int, seq: int) -> JSONResponse:
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"""构造带会话 Cookie 的成功响应（沿用同一 Cookie 格式）。"""
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resp = JSONResponse(content={'status': 200, 'success': True, 'message': message, 'data': payload})
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cookie = cs.dumps(deps.secret_key(), {
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'site_uid': uid, 'site_uid_seq': seq, 'site_uid_ts': int(time.time()),
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})
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resp.set_cookie(SESSION_COOKIE, cookie, **_cookie_kwargs())
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return resp
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@router.post('/auth/logout')
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async def logout(user: Annotated[SiteUser | None, Depends(current_user)]):
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"""退出登录：递增 login_seq 使本账号全部已签发会话失效，并删除本机 Cookie。"""
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if user is not None:
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try:
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await db.execute(
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'UPDATE users SET login_seq = COALESCE(login_seq, 0) + 1 WHERE id = ?',
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(user.id,))
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except Exception:
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pass
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resp = JSONResponse(content={'status': 200, 'success': True, 'message': '已退出登录'})
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resp.delete_cookie(SESSION_COOKIE)
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return resp
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@router.post('/auth/heartbeat')
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async def heartbeat(user: Annotated[SiteUser | None, Depends(current_user)]):
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"""会话保活：返回最新次数；超限/失效给 401（expired 语义不变）。"""
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if user is None:
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return error('登录已失效', 401, error_code='unauthorized')
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row = await repo.get_user_by_id(user.id)
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if row is None:
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return error('登录已失效', 401, error_code='unauthorized')
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credits = int(row.get('duration_seconds') or 0)
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if row.get('role') != 'admin' and credits != -1 and credits <= 0:
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return error('剩余次数已用完', 401, error_code='expired')
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return success({'duration_seconds': row.get('duration_seconds'),
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'duration_text': _format_credits(credits)})
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@router.post('/auth/ann_seen')
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async def ann_seen(user: Annotated[SiteUser | None, Depends(current_user)]):
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"""标记公告已读（记录当前公告版本）。"""
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if user is not None:
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ann = await repo.get_announcement()
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await db.execute('UPDATE users SET ann_seen = ? WHERE id = ?',
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(ann.get('updated_at', ''), user.id))
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return success()
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async def _resolve_login_identity(username: str) -> tuple:
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"""身份解析：含 @ 按归一化邮箱解析真实账号。
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返回 (邮箱命中的用户或 None, 锁定计数键)。邮箱登录的锁定键用
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真实用户名（命中时）或归一化邮箱（未命中时），防大小写变体绕过。
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"""
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if '@' not in username:
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return None, username
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iuser = await asyncio.to_thread(auth.get_user_by_email, username)
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lock_name = iuser['username'] if iuser else (auth._normalize_email(username) or username)
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return iuser, lock_name
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async def _allow_login_attempt(lock_name: str, ip: str) -> bool:
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"""失败锁定闸：允许尝试返回 True；锁定时落一条一次性审计日志并返回 False。"""
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from web.auth_state import (
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_login_fail_check,
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_login_fail_locked_log_once,
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)
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if _login_fail_check(lock_name):
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return True
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if _login_fail_locked_log_once(lock_name):
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await asyncio.to_thread(auth.add_log, 'fail', lock_name, ip,
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'登录', '失败次数过多，临时锁定')
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return False
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async def _check_account_status(user, lock_name: str, ip: str):
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"""账号状态闸：封禁（原因落日志）/禁用；通过返回 None。"""
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keys = user.keys()
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status = user['status'] if 'status' in keys else 1
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if status == 2:
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reason = user['ban_reason'] if 'ban_reason' in keys else ''
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await asyncio.to_thread(auth.add_log, 'fail', lock_name, ip,
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'登录', f'封禁账号尝试登录: {reason}')
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return error('账号已被封禁' + (f'：{reason}' if reason else '') + '，请联系管理员')
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if status == 0:
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return error('账号已被禁用，请联系管理员')
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return None
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async def _admin_two_factor_response(user, lock_name: str, ip: str) -> JSONResponse:
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"""管理员登录一律转两步验证通道（密码正确才签发票据；未绑定邮箱 fail-closed）。"""
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from web.auth_state import (
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_admin2fa_issue,
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_admin2fa_mask,
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)
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admin_email = user['email'] if 'email' in user.keys() else ''
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if not admin_email:
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await asyncio.to_thread(auth.add_log, 'fail', lock_name, ip,
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'管理员登录', '未绑定邮箱，两步验证不可用')
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return error('管理员账号未绑定邮箱，请联系管理员先完成绑定')
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ticket = _admin2fa_issue(user)
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await asyncio.to_thread(auth.add_log, 'success', lock_name, ip,
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'管理员登录', '密码验证通过，待邮箱验证')
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return success({'ticket': ticket, 'email_masked': _admin2fa_mask(admin_email),
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'username': user['username'], 'admin_2fa': True},
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'密码验证通过，请完成邮箱验证')
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async def _user_session_response(user, ip: str) -> JSONResponse:
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"""普通用户建会话：login_seq 原子递增顶号 → 异地多省封禁闸 → 签发 Cookie。"""
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uid = int(user['id'])
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now = int(time.time())
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await db.execute(
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'UPDATE users SET last_active = ?, last_login = ?, '
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'login_seq = COALESCE(login_seq, 0) + 1 WHERE id = ?', (now, now, uid))
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seq_row = await repo.get_user_by_id(uid)
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seq = int((seq_row or {}).get('login_seq') or 1)
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banned, _info = await asyncio.to_thread(auth.record_login_location, user, ip)
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if banned:
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await db.execute(
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'UPDATE users SET login_seq = COALESCE(login_seq, 0) + 1 WHERE id = ?', (uid,))
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return error('检测到账号在多个省份异常登录，已自动封禁，请联系管理员')
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fresh = await repo.get_user_by_id(uid) or {}
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return _login_response({
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'user': _user_public(fresh),
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'duration_text': _format_credits(int(fresh.get('duration_seconds') or 0)),
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'redirect': 'admin' if fresh.get('role') == 'admin' else 'user',
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}, '登录成功', uid, seq)
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@router.post('/auth/login')
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async def login(request: Request):
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"""登录：密码校验（含邮箱登录）、失败锁定、管理员两步验证转票据。
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分支顺序：超长密码直拒 → 身份解析 → 失败锁定 → 密码校验 →
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状态闸（封禁/禁用）→ 管理员转 2FA → 普通用户建会话（含异地封禁）。
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"""
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data = await _request_data(request)
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username = str(data.get('username') or '').strip()
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password = str(data.get('password') or '')
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ip = ratelimit.client_ip(request)
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if len(password) > 128:
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# 超长密码不做 PBKDF2（CPU 放大器），直接按密码错误拒绝
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return error('用户名或密码错误')
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try:
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iuser, lock_name = await _resolve_login_identity(username)
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if not await _allow_login_attempt(lock_name, ip):
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return error('尝试过于频繁，该账号已临时锁定，请 10 分钟后再试')
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verify_name = iuser['username'] if iuser is not None else username
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user = await asyncio.to_thread(auth.verify_login, verify_name, password)
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if not user:
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from web.auth_state import _login_fail_record
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_login_fail_record(lock_name)
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return error('用户名或密码错误')
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status_err = await _check_account_status(user, lock_name, ip)
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if status_err is not None:
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return status_err
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from web.auth_state import _login_fail_clear
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_login_fail_clear(lock_name)
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if user['role'] == 'admin':
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return await _admin_two_factor_response(user, lock_name, ip)
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return await _user_session_response(user, ip)
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except Exception:
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return error('登录失败，请稍后重试', 500)
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# ============ 管理员两步验证 Step2 / Step3 ============
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@router.post('/auth/admin_login/email')
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async def admin_login_email(request: Request):
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"""管理员 2FA Step2：比对绑定邮箱 → 发送 admin2fa 验证码。"""
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import hmac as _hmac
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from web.auth_state import (
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_ADMIN2FA_LAST_SEND,
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_ADMIN2FA_SEND_GAP,
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_ADMIN_2FA,
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_ADMIN_2FA_MAX_ATTEMPTS,
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_admin2fa_mask,
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_admin2fa_take,
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)
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data = await _request_data(request)
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ip = ratelimit.client_ip(request)
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ticket, v = _admin2fa_take(str(data.get('ticket') or ''))
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if not v:
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return error('登录会话已过期，请重新开始登录', 401, error_code='admin_2fa_expired')
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email_input = auth._normalize_email(str(data.get('email') or ''))
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# 第二因子比对走常时比较
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if (not email_input or not v.get('email')
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or not _hmac.compare_digest(email_input, v['email'])):
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v['attempts'] += 1
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await asyncio.to_thread(auth.add_log, 'fail', v['username'], ip, '管理员登录', '绑定邮箱不匹配')
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if v['attempts'] >= _ADMIN_2FA_MAX_ATTEMPTS:
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_ADMIN_2FA.pop(ticket, None)
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return error('错误次数过多，请重新开始登录')
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return error(f'绑定邮箱不正确，还可尝试 {_ADMIN_2FA_MAX_ATTEMPTS - v["attempts"]} 次')
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last_send = _ADMIN2FA_LAST_SEND.get(v['username'], 0)
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if time.time() - last_send < _ADMIN2FA_SEND_GAP:
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return error('验证码发送过于频繁，请 1 分钟后再试')
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try:
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await asyncio.to_thread(auth.send_verify_code, v['email'], 'admin2fa')
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_ADMIN2FA_LAST_SEND[v['username']] = time.time()
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await asyncio.to_thread(auth.add_log, 'success', v['username'], ip, '管理员登录',
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f'绑定邮箱验证通过，验证码已发送（{_admin2fa_mask(v["email"])}）')
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return success(message='验证码已发送至管理员邮箱，请查收')
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except (ValueError, RuntimeError) as e:
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return error(str(e))
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except Exception:
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return error('验证码发送失败，请稍后重试', 500)
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@router.post('/auth/admin_login/verify')
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async def admin_login_verify(request: Request):
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"""管理员 2FA Step3：验证码原子消费 → 建立管理员会话。"""
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from web.auth_state import (
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_ADMIN_2FA,
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_ADMIN_2FA_MAX_ATTEMPTS,
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_admin2fa_take,
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)
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data = await _request_data(request)
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ip = ratelimit.client_ip(request)
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ticket, v = _admin2fa_take(str(data.get('ticket') or ''))
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if not v:
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return error('登录会话已过期，请重新开始登录', 401, error_code='admin_2fa_expired')
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code = str(data.get('code') or '').strip()
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if not await asyncio.to_thread(auth.check_verify_code, v['email'], code, 'admin2fa'):
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v['attempts'] += 1
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if v['attempts'] >= _ADMIN_2FA_MAX_ATTEMPTS:
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_ADMIN_2FA.pop(ticket, None)
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return error('错误次数过多，请重新开始登录')
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await asyncio.to_thread(auth.add_log, 'fail', v['username'], ip, '管理员登录', '验证码错误')
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return error('验证码错误或已过期')
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_ADMIN_2FA.pop(ticket, None) # 一次性
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user = await asyncio.to_thread(auth.get_user_by_id, v['user_id'])
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if not user or user['role'] != 'admin':
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return error('登录会话已过期，请重新开始登录', 401, error_code='admin_2fa_expired')
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keys = user.keys()
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status = user['status'] if 'status' in keys else 1
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if status == 2:
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await asyncio.to_thread(auth.add_log, 'fail', v['username'], ip, '管理员登录', '封禁账号尝试登录')
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return error('账号已被封禁，请联系管理员')
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if status == 0:
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return error('账号已被禁用，请联系管理员')
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uid = int(user['id'])
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now = int(time.time())
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await db.execute('UPDATE users SET last_active=?, last_login=?, '
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'login_seq=COALESCE(login_seq,0)+1 WHERE id=?', (now, now, uid))
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seq_row = await repo.get_user_by_id(uid)
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seq = int((seq_row or {}).get('login_seq') or 1)
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banned, _info = await asyncio.to_thread(auth.record_login_location, user, ip)
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if banned:
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await db.execute('UPDATE users SET login_seq = COALESCE(login_seq, 0) + 1 WHERE id = ?', (uid,))
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return error('检测到账号在多个省份异常登录，已自动封禁，请联系管理员')
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fresh = await repo.get_user_by_id(uid) or {}
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await asyncio.to_thread(auth.add_log, 'success', v['username'], ip, '管理员登录', '两步验证通过')
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return _login_response({
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'user': _user_public(fresh),
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'duration_text': _format_credits(int(fresh.get('duration_seconds') or 0)),
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'redirect': 'admin',
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}, '登录成功', uid, seq)
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