Java TripleDESCryptoServiceProvider等效于Java

Question

拜托,请不要问我为什么.我只是在.NET中使用此代码来加密/解密数据字符串.我现在需要在java中制作"完全"相同的功能.我已经尝试了几个DESede crypt的例子,但是它们都没有给出与.net中这个类相同的结果.

我甚至在ssl后面制作一个.net webserbvice来服务于.net写的这两种方法但是如果不用尽所有的可能性就太愚蠢了.

也许你们中的一些在这个领域更有相关性的java人将会在你的头脑中如何制作它.

谢谢 !!!

public class Encryption
{
  private static byte[] sharedkey = {...};
  private static byte[] sharedvector = {...};

  public static String Decrypt(String val)
  {
    TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
    byte[] toDecrypt = Convert.FromBase64String(val);
    MemoryStream ms = new MemoryStream();
    CryptoStream cs = new CryptoStream(ms, tdes.CreateDecryptor( sharedkey, sharedvector ), CryptoStreamMode.Write);

    cs.Write(toDecrypt, 0, toDecrypt.Length);
    cs.FlushFinalBlock();
    return Encoding.UTF8.GetString(ms.ToArray());
  }

  public static String Encrypt(String val)
  {
    TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
    byte[] toEncrypt = Encoding.UTF8.GetBytes(val);
    MemoryStream ms = new MemoryStream();
    CryptoStream cs = new CryptoStream(ms, tdes.CreateEncryptor( sharedkey, sharedvector ), CryptoStreamMode.Write);
    cs.Write(toEncrypt, 0, toEncrypt.Length);
    cs.FlushFinalBlock();
    return Convert.ToBase64String(ms.ToArray());
  }
}

---

Samle输入/输出

String plain = "userNameHere:passwordHere";
Console.WriteLine("plain: " + plain);


String encrypted = Encrypt(plain);
Console.WriteLine("encrypted: " + encrypted);
// "zQPZgQHpjxR+41Bc6+2Bvqo7+pQAxBBVN+0V1tRXcOc="

String decripted = Decrypt(encrypted);
Console.WriteLine("decripted: " + decripted); 
// "userNameHere:passwordHere"

Answer 1

代码如下,但首先是几个注释.

1. 必须为每个消息选择不同的初始化向量.硬编码初始化向量没有意义.IV应与密文一起发送给消息接收者(这不是秘密).
2. 我使用自己的实用程序类进行base-64编码.您可以使用sun.misc.BASE64Encoder和sun.misc.BASE64Decoder替代使用像BouncyCastle这样的第三方库,或者编写自己的库.
3. 您正在使用双键三重DES,其中第一个键和第三个键是相同的.我修改sharedkey后反映了这一点,因为Java DESede密码总是需要192位密钥; 由键生成器来处理键控选项.
4. CBC IV仅为64位.我只使用了前64位sharedvector.

该类应与C#版本互操作.

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public class Encryption
{

  private static byte[] sharedkey = {
    0x01, 0x02, 0x03, 0x05, 0x07, 0x0B, 0x0D, 0x11, 
    0x12, 0x11, 0x0D, 0x0B, 0x07, 0x02, 0x04, 0x08, 
    0x01, 0x02, 0x03, 0x05, 0x07, 0x0B, 0x0D, 0x11
  };

  private static byte[] sharedvector = {
    0x01, 0x02, 0x03, 0x05, 0x07, 0x0B, 0x0D, 0x11
  };

  public static void main(String... argv)
    throws Exception
  {
    String plaintext = "userNameHere:passwordHere";
    String ciphertext = encrypt(plaintext);
    System.out.println(ciphertext);
    System.out.println(decrypt(ciphertext));
  }

  public static String encrypt(String plaintext)
    throws Exception
  {
    Cipher c = Cipher.getInstance("DESede/CBC/PKCS5Padding");
    c.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(sharedkey, "DESede"), new IvParameterSpec(sharedvector));
    byte[] encrypted = c.doFinal(plaintext.getBytes("UTF-8"));
    return Base64.encode(encrypted);
  }

  public static String decrypt(String ciphertext)
    throws Exception
  {
    Cipher c = Cipher.getInstance("DESede/CBC/PKCS5Padding");
    c.init(Cipher.DECRYPT_MODE, new SecretKeySpec(sharedkey, "DESede"), new IvParameterSpec(sharedvector));
    byte[] decrypted = c.doFinal(Base64.decode(ciphertext));
    return new String(decrypted, "UTF-8");
  }

}

输出:

zQPZgQHpjxR + 41Bc6 + 2Bvqo7 + pQAxBBVN + 0V1tRXcOc =

userNameHere:passwordHere