'use strict';
// 淘宝云网关签名：真实网关请求不带 sign_method，缺省等价于 md5(secret+content+secret)。
// 2026-11-01 用 nginx access.log 抓到的真实请求离线复算确认（原先按 md5(content+secret) 实现，
// 导致真机登录一直 401「淘宝身份校验失败」）。
const assert = require('node:assert/strict');
const TaobaoAuth = require('../lib/taobao-auth');

const body = '{"consent":true,"challenge":"nonce"}';
const secret = 'secret';
const base = { app_key: 'app', env: 'online', open_id: 'open-account' };

// 1) 显式 sign_method=md5
assert.equal(
  TaobaoAuth.signature({ ...base, sign_method: 'md5' }, body, secret),
  'E673310E672C9EB7E918857C6C64D247');

// 2) 没有 sign_method（真实网关的形态）
assert.equal(
  TaobaoAuth.signature({ ...base }, body, secret),
  'DD2B95886A5E8F61D6111A5659E4FBD5');

// 3) 旧的错误实现 md5(content+secret) 必须不再被采用
assert.notEqual(
  TaobaoAuth.signature({ ...base }, body, secret),
  'E3EB6341161C9ED8CAE8E161F19D1729');

// 4) 不认识的 sign_method 仍然拒绝
assert.equal(TaobaoAuth.signature({ ...base, sign_method: 'none' }, body, secret), null);

// 5) verify 缺凭据直接返回 null
assert.equal(TaobaoAuth.verify('/api/taobao/session', body, {}), null);

// 6) verify 正例：按缺省 md5 形态算出的 sign 必须通过，并返回 providerKey
const digest = TaobaoAuth.signature({ app_key: 'app', open_id: 'open-account' }, body, secret);
assert.equal(digest, 'F3C8634FF590F83DBE269783A9038ECA');
const identity = TaobaoAuth.verify(
  `/api/taobao/session?app_key=app&open_id=open-account&sign=${digest}`,
  body,
  { TAOBAO_APP_KEY: 'app', TAOBAO_APP_SECRET: secret });
assert.equal(identity.providerKey,
  require('node:crypto').createHash('sha256').update('app:open-account').digest('hex'));

// 7) verify 反例：body 被改动后签名失效
assert.equal(TaobaoAuth.verify(
  `/api/taobao/session?app_key=app&open_id=open-account&sign=${digest}`,
  body + ' ',
  { TAOBAO_APP_KEY: 'app', TAOBAO_APP_SECRET: secret }), null);

console.log('PASS Taobao gateway signature: default md5 form, explicit md5, unknown method, verify positive/negative');