From 8f4949af80da3b44416b0190813e90d63fa71642 Mon Sep 17 00:00:00 2001
From: hongawen <83944980@qq.com>
Date: Mon, 16 Dec 2024 10:12:59 +0800
Subject: [PATCH] =?UTF-8?q?sm4=E8=A7=A3=E5=AF=86=E4=BC=98=E5=8C=96?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../com/njcn/common/utils/sm/Sm4Utils.java    | 100 +++++++-----------
 1 file changed, 39 insertions(+), 61 deletions(-)

diff --git a/pqs-common/common-core/src/main/java/com/njcn/common/utils/sm/Sm4Utils.java b/pqs-common/common-core/src/main/java/com/njcn/common/utils/sm/Sm4Utils.java
index b7c820b97..1bba92458 100644
--- a/pqs-common/common-core/src/main/java/com/njcn/common/utils/sm/Sm4Utils.java
+++ b/pqs-common/common-core/src/main/java/com/njcn/common/utils/sm/Sm4Utils.java
@@ -10,8 +10,7 @@ import java.util.regex.Pattern;
 /**
  * @author yexibao
  */
-public class Sm4Utils
-{
+public class Sm4Utils {
     //全局秘钥
     public final static String globalSecretKey = "11HDESaAhiHHug2z";
 
@@ -37,26 +36,20 @@ public class Sm4Utils
         this.iv = iv;
     }
 
-    public Sm4Utils(String secretKey)
-    {
+    public Sm4Utils(String secretKey) {
         this.secretKey = secretKey;
     }
 
-    public String encryptData_ECB(String plainText)
-    {
-        try
-        {
+    public String encryptData_ECB(String plainText) {
+        try {
             Sm4Context ctx = new Sm4Context();
             ctx.isPadding = true;
             ctx.mode = Sm4.SM4_ENCRYPT;
 
             byte[] keyBytes;
-            if (HEX_STRING)
-            {
+            if (HEX_STRING) {
                 keyBytes = util.hexStringToBytes(secretKey);
-            }
-            else
-            {
+            } else {
                 keyBytes = secretKey.getBytes();
             }
 
@@ -64,66 +57,59 @@ public class Sm4Utils
             sm4.sm4_setkey_enc(ctx, keyBytes);
             byte[] encrypted = sm4.sm4_crypt_ecb(ctx, plainText.getBytes("GBK"));
             String cipherText = new BASE64Encoder().encode(encrypted);
-            if (cipherText != null && cipherText.trim().length() > 0)
-            {
+            if (cipherText != null && cipherText.trim().length() > 0) {
                 Pattern p = Pattern.compile("\\s*|\t|\r|\n");
                 Matcher m = p.matcher(cipherText);
                 cipherText = m.replaceAll("");
             }
             return cipherText;
-        }
-        catch (Exception e)
-        {
+        } catch (Exception e) {
             return null;
         }
     }
 
-    public String decryptData_ECB(String cipherText)
-    {
-        try
-        {
+    public String decryptData_ECB(String cipherText) {
+        try {
             Sm4Context ctx = new Sm4Context();
             ctx.isPadding = true;
             ctx.mode = Sm4.SM4_DECRYPT;
 
             byte[] keyBytes;
-            if (HEX_STRING)
-            {
+            if (HEX_STRING) {
                 keyBytes = util.hexStringToBytes(secretKey);
-            }
-            else
-            {
+            } else {
                 keyBytes = secretKey.getBytes();
             }
 
             Sm4 sm4 = new Sm4();
             sm4.sm4_setkey_dec(ctx, keyBytes);
             byte[] decrypted = sm4.sm4_crypt_ecb(ctx, new BASE64Decoder().decodeBuffer(cipherText));
-            return new String(decrypted, "GBK");
-        }
-        catch (Exception e)
-        {
+            String tempText = new String(decrypted, "GBK");
+            String finalText = "";
+            for (int i = 0; i < tempText.length(); i++) {
+                char c = tempText.charAt(i);
+                if ((int) c != 0) {
+                    finalText += c;
+                }
+            }
+            return finalText;
+        } catch (Exception e) {
             return null;
         }
     }
 
-    public String encryptData_CBC(String plainText)
-    {
-        try
-        {
+    public String encryptData_CBC(String plainText) {
+        try {
             Sm4Context ctx = new Sm4Context();
             ctx.isPadding = true;
             ctx.mode = Sm4.SM4_ENCRYPT;
 
             byte[] keyBytes;
             byte[] ivBytes;
-            if (HEX_STRING)
-            {
+            if (HEX_STRING) {
                 keyBytes = util.hexStringToBytes(secretKey);
                 ivBytes = util.hexStringToBytes(iv);
-            }
-            else
-            {
+            } else {
                 keyBytes = secretKey.getBytes();
                 ivBytes = iv.getBytes();
             }
@@ -132,37 +118,29 @@ public class Sm4Utils
             sm4.sm4_setkey_enc(ctx, keyBytes);
             byte[] encrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, plainText.getBytes("GBK"));
             String cipherText = new BASE64Encoder().encode(encrypted);
-            if (cipherText != null && cipherText.trim().length() > 0)
-            {
+            if (cipherText != null && cipherText.trim().length() > 0) {
                 Pattern p = Pattern.compile("\\s*|\t|\r|\n");
                 Matcher m = p.matcher(cipherText);
                 cipherText = m.replaceAll("");
             }
             return cipherText;
-        }
-        catch (Exception e)
-        {
+        } catch (Exception e) {
             return null;
         }
     }
 
-    public String decryptData_CBC(String cipherText)
-    {
-        try
-        {
+    public String decryptData_CBC(String cipherText) {
+        try {
             Sm4Context ctx = new Sm4Context();
             ctx.isPadding = true;
             ctx.mode = Sm4.SM4_DECRYPT;
 
             byte[] keyBytes;
             byte[] ivBytes;
-            if (HEX_STRING)
-            {
+            if (HEX_STRING) {
                 keyBytes = util.hexStringToBytes(secretKey);
                 ivBytes = util.hexStringToBytes(iv);
-            }
-            else
-            {
+            } else {
                 keyBytes = secretKey.getBytes();
                 ivBytes = iv.getBytes();
             }
@@ -171,23 +149,23 @@ public class Sm4Utils
             sm4.sm4_setkey_dec(ctx, keyBytes);
             byte[] decrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, new BASE64Decoder().decodeBuffer(cipherText));
             return new String(decrypted, "GBK");
-        }
-        catch (Exception e)
-        {
+        } catch (Exception e) {
             return null;
         }
     }
 
-    public static void main(String[] args) throws IOException
-    {
-        String plainText ="@#001njcnpqs";
+    public static void main(String[] args) throws IOException {
+        String plainText = "@#001njcnpqs";
         //11HDESaAhiHHugDz
         String secretKey = "11HDESaAhiHHug2z";
         Sm4Utils sm4 = new Sm4Utils(secretKey);
 
         String cipherText = sm4.encryptData_ECB(plainText);
+        System.out.println("加密后：" + cipherText);
         String cipherText1 = sm4.decryptData_ECB(cipherText);
-        cipherText =  cipherText + "11HDESaAhiHHug2z";
+        System.out.println("解密后：" + cipherText1);
+
+        cipherText = cipherText + "11HDESaAhiHHug2z";
         sm4.setSecretKey("11HDESaAhiHHug2z");
         cipherText = sm4.encryptData_ECB(cipherText);
         plainText = sm4.decryptData_ECB(cipherText);