vpn connection 测试通过，可正常握手，可访问filegator并正确下载文件

app/src/main/java/com/pkusz/min_vpn_client/services/MINVpnConnection.java

@@ -342,8 +342,12 @@ public class MINVpnConnection implements Runnable{
                     byte[] decrpytedIPPackage = new byte[buf2.position()];
                     System.arraycopy(buf2.array(), 0, decrpytedIPPackage, 0, buf2.position());
                     ByteBuffer buf3 = ByteBuffer.allocate(5000);
+                    System.out.println("要解密啦,要解密的包是："+ Arrays.toString(decrpytedIPPackage));
+                    System.out.println("要解密啦,要解密的包长度是："+decrpytedIPPackage.length);
                     buf3.put(Objects.requireNonNull(AESHelperForConnection.decryptWithAES(mSharedSecretString, decrpytedIPPackage)));
 //                    buf3.put(Objects.requireNonNull(SM4HelperForConnection.decryptWithSM4(realSecret, decrpytedIPPackage)));
+                    System.out.println("解密结果："+ Arrays.toString(buf3.array()));
+                    System.out.println("解密结果-len："+ buf3.position());
                     int decryptedDataLen = buf3.position();
                     byte firstByte = buf3.get(0);
                     if (firstByte == 0) {

app/src/main/java/com/pkusz/min_vpn_client/utils/AESHelperForConnection.java

@@ -108,6 +108,10 @@ public class AESHelperForConnection {
 
     // AES without base64
     public static byte[] decryptWithAES(String key, final byte[] message) {
+//        System.out.println("key: "+key);
+//        System.out.println("aes解密: "+ Arrays.toString(message));
+//        System.out.println("aes解密: "+message.length);
+//        System.out.println("aes解密: "+toPos(message));
         try {
             // Use md5 value as the real key
             byte[] b = key.getBytes();
@@ -129,4 +133,18 @@ public class AESHelperForConnection {
         }
         return null;
     }
+
+    // 输出byte[]
+    private static String toPos(byte[] a){
+        String res="[";
+        for (int i = 0; i < a.length; i++) {
+            if(a[i]<0){
+                res+=a[i]+256+", ";
+            }else {
+                res+=a[i]+", ";
+            }
+        }
+        res+="]";
+        return res;
+    }
 }