identity(without persist & without test)

src/main/java/minsecurity/crypto/sm2/SM4Exception.java

@@ -0,0 +1,14 @@
+package minsecurity.crypto.sm2;
+
+/*
+ * @Author: hongyu guo
+ * @Description:
+ * @Version: 1.0.0
+ * @Date: 15:19 2021/03/09
+ * @Copyright: MIN-Group；国家重大科技基础设施——未来网络北大实验室；深圳市信息论与未来网络重点实验室
+ */
+public class SM4Exception extends Exception{
+    SM4Exception(String msg){
+        super(msg);
+    }
+}