C#和JAVA 3DES加密解密

最近 一个项目.net 要调用JAVA的WEB SERVICE，数据采用3DES加密，涉及到两种语言3DES一致性的问题， 下面分享一下， 这里的KEY采用Base64编码，便用分发，因为Java的Byte范围为-128至127，c#的Byte范围是0-255 核心是确定Mode和Padding，关于这两个的意思可以搜索3DES算法相关文章 一个是C#采用CBC Mode，PKCS7 Padding,Java采用CBC Mode，PKCS5Padding Padding, 另一个是C#采用ECB Mode，PKCS7
Padding,Java采用ECB Mode，PKCS5Padding Padding, Java的ECB模式不需要IV 对字符加密时，双方采用的都是UTF-8编码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Security.Cryptography;

/// <summary>
/// DES3加密解密
/// </summary>
public class Des3
{
#region CBC模式**
/// <summary>
/// DES3 CBC模式加密
/// </summary>
/// <param name="key">密钥</param>
/// <param name="iv">IV</param>
/// <param name="data">明文的byte数组</param>
/// <returns>密文的byte数组</returns>
public static byte[] Des3EncodeCBC(byte[] key, byte[] iv, byte[] data)
{
//复制于MSDN
try
{
// Create a MemoryStream.
MemoryStream mStream = new MemoryStream();
TripleDESCryptoServiceProvider tdsp = new TripleDESCryptoServiceProvider();
tdsp.Mode = CipherMode.CBC;             //默认值
tdsp.Padding = PaddingMode.PKCS7;       //默认值
// Create a CryptoStream using the MemoryStream
// and the passed key and initialization vector (IV).
CryptoStream cStream = new CryptoStream(mStream,
tdsp.CreateEncryptor(key, iv),
CryptoStreamMode.Write);
// Write the byte array to the crypto stream and flush it.
cStream.Write(data, 0, data.Length);
cStream.FlushFinalBlock();
// Get an array of bytes from the
// MemoryStream that holds the
// encrypted data.
byte[] ret = mStream.ToArray();
// Close the streams.
cStream.Close();
mStream.Close();
// Return the encrypted buffer.
return ret;
}
catch (CryptographicException e)
{
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message);
return null;
}
}
/// <summary>
/// DES3 CBC模式解密
/// </summary>
/// <param name="key">密钥</param>
/// <param name="iv">IV</param>
/// <param name="data">密文的byte数组</param>
/// <returns>明文的byte数组</returns>
public static byte[] Des3DecodeCBC(byte[] key, byte[] iv, byte[] data)
{
try
{
// Create a new MemoryStream using the passed
// array of encrypted data.
MemoryStream msDecrypt = new MemoryStream(data);
TripleDESCryptoServiceProvider tdsp = new TripleDESCryptoServiceProvider();
tdsp.Mode = CipherMode.CBC;
tdsp.Padding = PaddingMode.PKCS7;
// Create a CryptoStream using the MemoryStream
// and the passed key and initialization vector (IV).
CryptoStream csDecrypt = new CryptoStream(msDecrypt,
tdsp.CreateDecryptor(key, iv),
CryptoStreamMode.Read);
// Create buffer to hold the decrypted data.
byte[] fromEncrypt = new byte[data.Length];
// Read the decrypted data out of the crypto stream
// and place it into the temporary buffer.
csDecrypt.Read(fromEncrypt, 0, fromEncrypt.Length);
//Convert the buffer into a string and return it.
return fromEncrypt;
}
catch (CryptographicException e)
{
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message);
return null;
}
}
#endregion
#region ECB模式
/// <summary>
/// DES3 ECB模式加密
/// </summary>
/// <param name="key">密钥</param>
/// <param name="iv">IV(当模式为ECB时，IV无用)</param>
/// <param name="str">明文的byte数组</param>
/// <returns>密文的byte数组</returns>
public static byte[] Des3EncodeECB(byte[] key, byte[] iv, byte[] data)
{
try
{
// Create a MemoryStream.
MemoryStream mStream = new MemoryStream();
TripleDESCryptoServiceProvider tdsp = new TripleDESCryptoServiceProvider();
tdsp.Mode = CipherMode.ECB;
tdsp.Padding = PaddingMode.PKCS7;
// Create a CryptoStream using the MemoryStream
// and the passed key and initialization vector (IV).
CryptoStream cStream = new CryptoStream(mStream,
tdsp.CreateEncryptor(key, iv),
CryptoStreamMode.Write);
// Write the byte array to the crypto stream and flush it.
cStream.Write(data, 0, data.Length);
cStream.FlushFinalBlock();
// Get an array of bytes from the
// MemoryStream that holds the
// encrypted data.
byte[] ret = mStream.ToArray();
// Close the streams.
cStream.Close();
mStream.Close();
// Return the encrypted buffer.
return ret;
}
catch (CryptographicException e)
{
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message);
return null;
}
}
/// <summary>
/// DES3 ECB模式解密
/// </summary>
/// <param name="key">密钥</param>
/// <param name="iv">IV(当模式为ECB时，IV无用)</param>
/// <param name="str">密文的byte数组</param>
/// <returns>明文的byte数组</returns>
public static byte[] Des3DecodeECB(byte[] key, byte[] iv, byte[] data)
{
try
{
// Create a new MemoryStream using the passed
// array of encrypted data.
MemoryStream msDecrypt = new MemoryStream(data);
TripleDESCryptoServiceProvider tdsp = new TripleDESCryptoServiceProvider();
tdsp.Mode = CipherMode.ECB;
tdsp.Padding = PaddingMode.PKCS7;
// Create a CryptoStream using the MemoryStream
// and the passed key and initialization vector (IV).
CryptoStream csDecrypt = new CryptoStream(msDecrypt,
tdsp.CreateDecryptor(key, iv),
CryptoStreamMode.Read);
// Create buffer to hold the decrypted data.
byte[] fromEncrypt = new byte[data.Length];
// Read the decrypted data out of the crypto stream
// and place it into the temporary buffer.
csDecrypt.Read(fromEncrypt, 0, fromEncrypt.Length);
//Convert the buffer into a string and return it.
return fromEncrypt;
}
catch (CryptographicException e)
{
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message);
return null;
}
}
#endregion
/// <summary>
/// 类测试
/// </summary>
public static void Test()
{
System.Text.Encoding utf8 = System.Text.Encoding.UTF8;
//key为abcdefghijklmnopqrstuvwx的Base64编码
byte[] key = Convert.FromBase64String("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4");
byte[] iv = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };      //当模式为ECB时，IV无用
byte[] data = utf8.GetBytes("中国ABCabc123");
System.Console.WriteLine("ECB模式:");
byte[] str1 = Des3.Des3EncodeECB(key, iv, data);
byte[] str2 = Des3.Des3DecodeECB(key, iv, str1);
System.Console.WriteLine(Convert.ToBase64String(str1));
System.Console.WriteLine(System.Text.Encoding.UTF8.GetString(str2));
System.Console.WriteLine();
System.Console.WriteLine("CBC模式:");
byte[] str3 = Des3.Des3EncodeCBC(key, iv, data);
byte[] str4 = Des3.Des3DecodeCBC(key, iv, str3);
System.Console.WriteLine(Convert.ToBase64String(str3));
System.Console.WriteLine(utf8.GetString(str4));
System.Console.WriteLine();
}
}

接着是Java代码

import java.security.Key; 
import javax.crypto.Cipher; 
import javax.crypto.SecretKeyFactory; 
import javax.crypto.spec.DESedeKeySpec; 
import javax.crypto.spec.IvParameterSpec; 
import sun.misc.BASE64Decoder; 
import sun.misc.BASE64Encoder; 
public class Des3 { 
    public static void main(String[] args) throws Exception { 
        byte[] key=new BASE64Decoder().decodeBuffer("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4"); 
        byte[] keyiv = { 1, 2, 3, 4, 5, 6, 7, 8 }; 
        byte[] data="中国ABCabc123".getBytes("UTF-8"); 
         
        System.out.println("ECB加密解密"); 
        byte[] str3 = des3EncodeECB(key,data ); 
        byte[] str4 = ees3DecodeECB(key, str3); 
        System.out.println(new BASE64Encoder().encode(str3)); 
        System.out.println(new String(str4, "UTF-8")); 
        System.out.println(); 
        System.out.println("CBC加密解密"); 
        byte[] str5 = des3EncodeCBC(key, keyiv, data); 
        byte[] str6 = des3DecodeCBC(key, keyiv, str5); 
        System.out.println(new BASE64Encoder().encode(str5)); 
        System.out.println(new String(str6, "UTF-8")); 
    } 
    /**
     * ECB加密,不要IV
     * @param key 密钥
     * @param data 明文
     * @return Base64编码的密文
     * @throws Exception
     */ 
    public static byte[] des3EncodeECB(byte[] key, byte[] data) 
            throws Exception { 
        Key deskey = null; 
        DESedeKeySpec spec = new DESedeKeySpec(key); 
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede"); 
        deskey = keyfactory.generateSecret(spec); 
        Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding"); 
        cipher.init(Cipher.ENCRYPT_MODE, deskey); 
        byte[] bOut = cipher.doFinal(data); 
        return bOut; 
    } 
    /**
     * ECB解密,不要IV
     * @param key 密钥
     * @param data Base64编码的密文
     * @return 明文
     * @throws Exception
     */ 
    public static byte[] ees3DecodeECB(byte[] key, byte[] data) 
            throws Exception { 
        Key deskey = null; 
        DESedeKeySpec spec = new DESedeKeySpec(key); 
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede"); 
        deskey = keyfactory.generateSecret(spec); 
        Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding"); 
        cipher.init(Cipher.DECRYPT_MODE, deskey); 
        byte[] bOut = cipher.doFinal(data); 
        return bOut; 
    } 
    /**
     * CBC加密
     * @param key 密钥
     * @param keyiv IV
     * @param data 明文
     * @return Base64编码的密文
     * @throws Exception
     */ 
    public static byte[] des3EncodeCBC(byte[] key, byte[] keyiv, byte[] data) 
            throws Exception { 
        Key deskey = null; 
        DESedeKeySpec spec = new DESedeKeySpec(key); 
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede"); 
        deskey = keyfactory.generateSecret(spec); 
        Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding"); 
        IvParameterSpec ips = new IvParameterSpec(keyiv); 
        cipher.init(Cipher.ENCRYPT_MODE, deskey, ips); 
        byte[] bOut = cipher.doFinal(data); 
        return bOut; 
    } 
    /**
     * CBC解密
     * @param key 密钥
     * @param keyiv IV
     * @param data Base64编码的密文
     * @return 明文
     * @throws Exception
     */ 
    public static byte[] des3DecodeCBC(byte[] key, byte[] keyiv, byte[] data) 
            throws Exception { 
        Key deskey = null; 
        DESedeKeySpec spec = new DESedeKeySpec(key); 
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede"); 
        deskey = keyfactory.generateSecret(spec); 
        Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding"); 
        IvParameterSpec ips = new IvParameterSpec(keyiv); 
        cipher.init(Cipher.DECRYPT_MODE, deskey, ips); 
        byte[] bOut = cipher.doFinal(data); 
        return bOut; 
    }

ECB模式:

rmWB4+r9Ug93WI0KAEuMig==

中国ABCabc123

CBC模式:

4aabWF8UFour/vNfnzJrjw==

中国ABCabc123

特别注意：

1当 key 是中文的时候

byte[] key = Convert.FromBase64String( "我是中国人" );   执行会报错，只支持英文或者数字

2.当key的长度不是24时候回报错 :"指定键的大小对于此算法无效"

解决办法如下：

var miyaoBytes = System.Text.Encoding.UTF8.GetBytes("我是中国人");
var key = new byte[24];
for (int i = 0; (i < miyaoBytes.Length) && i<24; i++)
{
key[i] = miyaoBytes[i];
}
var iv = new byte[] { 1,2,3,4,5,6,7,8};

var data= System.Text.Encoding.UTF8.GetBytes("加密前的数据");

var ll = Des3.Des3EncodeECB(key, iv, data);
var res =  Convert.ToBase64String(ll);
var te= Des3.Des3DecodeECB(key, iv, ll);
MessageBox.Show(System.Text.Encoding.UTF8.GetString(te));

如果对加密后得到的 byte数组 进行 
var res = Convert.ToBase64String(ll);    是不能够直接调用解密方法进行解密的负责会报错。     

转换后必须  调用 byteToHexStr(); 把byte数组转化为  16进制字符串

var bytes = Des3.Des3EncodeECB(key, iv, data);

var jiamiHou = byteToHexStr(bytes);

然后进行解密，同样解密前先转化为 16进制数组然后再进行解密：

var bytes =   strToToHexByte(jiamiHou);

Des3.Des3DecodeECB(key, iv, ll);          

/// <summary>
        /// 字符串转16进制字节数组
        /// </summary>
       /// <param name="hexString"></param>
        /// <returns></returns>
        private static byte[] strToToHexByte(string hexString)
        {
             hexString = hexString.Replace(" ", "");
           if ((hexString.Length % 2) != 0)
                 hexString += " ";
            byte[] returnBytes = new byte[hexString.Length / 2];
            for (int i = 0; i < returnBytes.Length; i++)
                returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);
            return returnBytes;
         }
 
 

/// <summary>
        /// 字节数组转16进制字符串
        /// </summary>
        /// <param name="bytes"></param>
        /// <returns></returns>
        public static string byteToHexStr(byte[] bytes)
       {
            string returnStr = "";
            if (bytes != null)
            {
                for (int i = 0; i < bytes.Length; i++)
                {
                     returnStr += bytes[i].ToString("X2");
                 }
             }
            return returnStr;
         }

原文地址：http://www.cnblogs.com/liluping860122/p/4026015.html