identity(without persist & without test)

src/main/java/minsecurity/crypto/KeyUtils.java

@@ -0,0 +1,62 @@
+package minsecurity.crypto;
+
+import minsecurity.Common;
+import minsecurity.crypto.sm2.SM2PrivateKey;
+import minsecurity.crypto.sm2.SM2PublicKey;
+
+/*
+ * @Author: hongyu guo
+ * @Description:
+ * @Version: 1.0.0
+ * @Date: 16:02 2021/03/06
+ * @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 KeyUtils {
+    /**
+     * 返回的数据类型为PublicKeyInterface接口, 必要时调用者需要手动将类型强制转化为需要的类型
+     * @param bytesOfPublicKey 公钥的bytes数组
+	 * @param algorithm 公钥类型
+     * @return minsecurity.crypto.PublicKeyInterface
+     * @author ghy
+     * @date 2021/3/7
+    **/
+    public static PublicKeyInterface unMarshalPublicKey(byte[] bytesOfPublicKey, int algorithm) {
+        if (bytesOfPublicKey == null || bytesOfPublicKey.length == 0) {
+            return null;
+        }
+        switch (algorithm) {
+            case Common.SM2:
+                SM2PublicKey sm2PublicKey = new SM2PublicKey();
+                sm2PublicKey.setBytes(bytesOfPublicKey);
+                return sm2PublicKey;
+            default:
+                return null;
+        }
+    }
+
+    public static PrivateKeyInterface unMarshalPrivateKey(byte[] bytesOfPrivateKey, int algorithm){
+        if(bytesOfPrivateKey == null || bytesOfPrivateKey.length == 0){
+            return null;
+        }
+        switch (algorithm) {
+            case Common.SM2:
+                SM2PrivateKey sm2PrivateKey = new SM2PrivateKey();
+                sm2PrivateKey.setBytes(bytesOfPrivateKey);
+                return sm2PrivateKey;
+            default:
+                return null;
+        }
+    }
+
+    public static byte[] get16bytePasswd(byte[] passwd) {
+        byte[] hashPasswd = HashAlgo.sm3(passwd);
+        if( hashPasswd.length == 32){
+            for(int i = 0; i < 16; i++){
+                hashPasswd[i] += hashPasswd[i + 16];
+            }
+        }
+        byte[] sm4Key = new byte[16];
+        System.arraycopy(hashPasswd,0,sm4Key,0,16);
+        return sm4Key;
+    }
+}