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fix: use new CN APIManager keyset for app version 6.4.0+ - #3
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The CN server now selects the API AES keyset by the X-App-Version header. Clients reporting 6.4.0 or later receive responses encrypted with a new key/IV (extracted from the 6.4.0 global-metadata), so decrypting them with the old keyset yielded empty data and msgpack failed with 'Unpack failed: incomplete input'. - Add get_keyset(region, app_version) that falls back to the legacy keyset for CN versions below 6.4.0 - Use it for request encryption / response decryption in AbCache - Add 'cn-legacy' region to apidecrypt for old dumps Fixes #2
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Fixes #2
问题
国服服务端会根据请求头
X-App-Version选择 API 的 AES keyset。客户端版本为 6.4.0 及以上时，响应用的是一组新的 key/IV。sssekai 仍用旧 keyset 解密，结果是空数据，于是msgpack报Unpack failed: incomplete input。对
GET /api/system的实测结果：新 key/IV 来自国服 6.4.0 APK 的
global-metadata.dat：P**************Or**************O改动
crypto/APIManager.py：cn换成新 keyset，旧 keyset 改名为cn-legacy；新增get_keyset(region, app_version)，国服版本低于 6.4.0 时用 legacy keysetabcache：请求加密和响应解密都改用get_keysetapidecrypt：--region新增cn-legacy，用于解密旧版本的抓包数据测试
AbCache._update_system_data()实际请求国服：6.4.0 用新 keyset 解密成功；6.3.0 和 5.4.0 用 legacy keyset 解密成功POSTuser auth）以及 6.4.0 之后的 AssetBundleInfo 还没验证。🤖 Generated with Claude Code