Question

我在C＃中有这个代码，我需要将它迁移到Java。我需要使用3DES加密。这是强制性的。

C＃：

public void test() 
{
    string sKSN = "ffff1234560006800010";
    string sBDK = "E08A46B616230152230DB9C8DF94C75E";
    byte[] dikKSN = new byte[10];
    byte[] KSN8 = new byte[8];
    byte[] BDK = new byte[16];
    byte[] lKey = new byte[8];
    byte[] rKey = new byte[8];
    string retKey = string.Empty;
    string lgTxt = string.Empty;
    dikKSN = this.FromHex(sKSN);  // convert hex to byte array
    BDK = this.FromHex(sBDK); // convert hex to byte array
    KSN8 = this.CopyByte8(dikKSN); //use the first 8 values
    lKey = this.TDESEncrypt(KSN8, BDK);
}
private byte[] TDESEncrypt(byte[] data, byte[] key) 
{
    byte[] retVal = null;
    byte[] IV = new byte[16];
    System.IO.MemoryStream ms = null;
    System.Security.Cryptography.TripleDES tDES = System.Security.Cryptography.TripleDES.Create();
    tDES.BlockSize = 64;
    tDES.KeySize = 128;
    tDES.Padding = System.Security.Cryptography.PaddingMode.None;
    tDES.Mode = System.Security.Cryptography.CipherMode.ECB;
    System.Security.Cryptography.CryptoStream csEncrypt = null;
    try
    {
        ms = new System.IO.MemoryStream(data);
        csEncrypt = new System.Security.Cryptography.CryptoStream(ms, tDES.CreateEncryptor(key, IV), System.Security.Cryptography.CryptoStreamMode.Write);
        retVal = new byte[data.Length];
        csEncrypt.Write(data, 0, data.Length);
        retVal = ms.ToArray();
    }
    catch (Exception ex)
    {
        Console.WriteLine(ex.Message);
    }
    finally
    {
        ms.Close();
    }
    return retVal;
}

JAVA ：

public void test() {
    String sKSN = "ffff1234560006800010";
    String sBDK = "E08A46B616230152230DB9C8DF94C75E";
    byte[] dikKSN = new byte[10];
    byte[] KSN8 = new byte[8];
    byte[] BDK = new byte[16];
    byte[] lKey = new byte[8];
    byte[] rKey = new byte[8];
    String retKey = "";
    String lgTxt = "";
    dikKSN = this.fromHex(sKSN);  // convert hex to byte array
    BDK = this.fromHex(sBDK); // convert hex to byte array
    KSN8 = this.copyByte8(dikKSN); //use the first 8 values
    lKey = this.tDESEncrypt(KSN8, BDK);
}
private byte[] tDESEncrypt(byte[] plainTextBytes, byte[] kb) {
  byte[] cipherText = null;
  try {
    final MessageDigest md = MessageDigest.getInstance("md5");
    final byte[] digestOfPassword = md.digest(kb);
    final byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
    for (int j = 0, k = 16; j < 8;) {
      keyBytes[k++] = keyBytes[j++];
    }
    final SecretKey key = new SecretKeySpec(keyBytes, "DESede");
    final Cipher cipher = Cipher.getInstance("DESede/CBC/NoPadding"); 
    final IvParameterSpec iv = new IvParameterSpec(new byte[8]);
    cipher.init(Cipher.ENCRYPT_MODE, key, iv);
    cipherText = cipher.doFinal(plainTextBytes);
  } catch (Exception ex) {
    ex.printStackTrace();
  }
  return cipherText;
}

执行desEncrypt方法时测试：

C＃

data = {255, 255, 18, 52, 86, 0, 6, 128};
key = {224, 138, 70, 182, 22, 35, 1, 82, 35, 13, 185, 200, 223, 148, 199, 94};

JAVA

plainBytes = {-1, -1, 18, 52, 86, 0, 6, -128};
kb = {-32, -118, 70, -74, 22, 35, 1, 82, 35, 13, -71, -56, -33, -108, -57, 94}

我认为我的主要问题是在Java中一个字节在-128和127之间，而在C＃中，字节原语可以包含255个数字。数据和关键变量的值是从相同的十六进制字符串转换为字节。

我需要Java代码返回与C＃代码相同的值。在这一刻，下面的值是回报：

Java = {99, -104, 95, 92, 59, -75, -30, -16};
C# = {171, 58, 144, 248, 46, 146, 227, 224};

我在两个结果之间没有任何共同的价值。

Answer 1

解决方案在这里：

3DES Decryption Error Invalid Key Length

我删除了MessageDigest密钥生成，并使用了以下代码：

private byte[] genTwoKey3DES(byte[] key) {
    byte[] keyAux;
    if (key.length == 16) {
        keyAux = new byte[24];
        System.arraycopy(key, 0, keyAux, 0, 16);
        System.arraycopy(key, 0, keyAux, 16, 8);
    } else {
        keyAux = key;
    }
    return keyAux;
}

3DES从C＃加密到JAVA

1 个答案: