commit f00a93afae0910871ff9c2915c18ef9656f24b7a
Author: renzhiyuan <465386466@qq.com>
Date:   Tue Jul 21 18:16:22 2026 +0800

    添加文件: go.mod

diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..1751c48
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,5 @@
+module xy-shanghai
+
+go 1.21
+
+require github.com/tjfoc/gmsm v1.4.1
\ No newline at end of file