julxxy/chinaport-data-signature

China E-Port Data Signature — Free, open-source solution for CEBXxxMessage & Customs 179 data signing. Plug-and-play: supports JSON push, sign failure email alerts, U-Key health check auto-restart. No middleware. 中国电子口岸 CEB 报文与 179 数据加签开源解决方案，支持 JSON 推送、加签失败邮件提醒、U-key 健康自动重启，开箱即用，无需中间件。