JAVA和.NET的系统类库里都有封装DES对称加密的实现方式，但是对外暴露的接口却各不相同，甚至有时会让自己难以解决其中的问题，比如JAVA加密后的结果在.NET中解密不出来等，由于最近项目有跨JAVA和.NET的加解密，经过我的分析调试，终于让它们可以互相加密解密了。直接上代码：
C# 代码
using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
/// <summary>
/// DES3加密解密
/// </summary>
public class Des3
{
public static void Main()
{
byte[] key = Convert.FromBase64String("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4"); //key为abcdefghijklmnopqrstuvwx的Base64编码
byte[] iv = { 1, 2, 3, 4, 5, 6, 7, 8 };
var data = Encoding.UTF8.GetBytes("中国ABCabc123:{}");
Console.WriteLine("ECB模式:");//当模式为ECB时，IV无用
var encode = Des3EncodeECB(key, iv, data);
var decode = Des3DecodeECB(key, iv, encode);
Console.WriteLine("加密：" + Convert.ToBase64String(encode));
Console.WriteLine("解密：" + Encoding.UTF8.GetString(decode));
Console.WriteLine();
Console.WriteLine("CBC模式:");
encode = Des3EncodeCBC(key, iv, data);
decode = Des3DecodeCBC(key, iv, encode);
Console.WriteLine("加密：" + Convert.ToBase64String(encode));
Console.WriteLine("解密：" + Encoding.UTF8.GetString(decode));
Console.WriteLine();
Console.Read();
}
#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)
{
try
{
byte[] bytes;
using (var memoryStream = new MemoryStream())
{
var provider = new TripleDESCryptoServiceProvider { Mode = CipherMode.CBC, Padding = PaddingMode.PKCS7 };
using (var stream = new CryptoStream(memoryStream, provider.CreateEncryptor(key, iv), CryptoStreamMode.Write))
{
stream.Write(data, 0, data.Length);
stream.FlushFinalBlock();
bytes = memoryStream.ToArray();
stream.Close();
}
memoryStream.Close();
}
return bytes;
}
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
{
var memoryStream = new MemoryStream(data);
var provider = new TripleDESCryptoServiceProvider { Mode = CipherMode.CBC, Padding = PaddingMode.PKCS7 };
byte[] bytes;
using (var stream = new CryptoStream(memoryStream, provider.CreateDecryptor(key, iv), CryptoStreamMode.Read))
{
bytes = new byte[data.Length];
stream.Read(bytes, 0, bytes.Length);
}
return bytes;
}
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="data">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
{
var memoryStream = new MemoryStream();
var provider = new TripleDESCryptoServiceProvider {Mode = CipherMode.ECB, Padding = PaddingMode.PKCS7};
byte[] bytes;
using (var stream = new CryptoStream(memoryStream, provider.CreateEncryptor(key, iv), CryptoStreamMode.Write))
{
stream.Write(data, 0, data.Length);
stream.FlushFinalBlock();
bytes = memoryStream.ToArray();
stream.Close();
}
memoryStream.Close();
return bytes;
}
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="data">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
{
var memoryStream = new MemoryStream(data);
var provider = new TripleDESCryptoServiceProvider {Mode = CipherMode.ECB, Padding = PaddingMode.PKCS7};
byte[] bytes;
using (var stream = new CryptoStream(memoryStream, provider.CreateDecryptor(key, iv), CryptoStreamMode.Read))
{
bytes = new byte[data.Length];
stream.Read(bytes, 0, bytes.Length);
}
return bytes;
}
catch (CryptographicException e)
{
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message);
return null;
}
}
#endregion
}运行结果
JAVA代码
import java.security.Key;
import java.util.Base64;
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 = decryptBASE64("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4");// key为abcdefghijklmnopqrstuvwx的Base64编码
byte[] keyiv = { 1, 2, 3, 4, 5, 6, 7, 8 };
byte[] data = "中国ABCabc123:{}".getBytes("UTF-8");
System.out.println("ECB模式：");// 当模式为ECB时，IV无用
byte[] encode = des3EncodeECB(key, data);
byte[] decode = ees3DecodeECB(key, encode);
System.out.println("加密：" + encryptBASE64(encode));
System.out.println("解密：" + new String(decode, "UTF-8"));
System.out.println();
System.out.println("CBC模式：");
encode = des3EncodeCBC(key, keyiv, data);
decode = des3DecodeCBC(key, keyiv, encode);
System.out.println("加密：" + encryptBASE64(encode));
System.out.println("解密：" + new String(decode, "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 factory = SecretKeyFactory.getInstance("desede");
deskey = factory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, deskey);
byte[] out = cipher.doFinal(data);
return out;
}
/**
* 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 factory = SecretKeyFactory.getInstance("desede");
deskey = factory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, deskey);
byte[] out = cipher.doFinal(data);
return out;
}
/**
* 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 factory = SecretKeyFactory.getInstance("desede");
deskey = factory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");
IvParameterSpec ips = new IvParameterSpec(keyiv);
cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);
byte[] out = cipher.doFinal(data);
return out;
}
/**
* 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 factory = SecretKeyFactory.getInstance("desede");
deskey = factory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");
IvParameterSpec ips = new IvParameterSpec(keyiv);
cipher.init(Cipher.DECRYPT_MODE, deskey, ips);
byte[] out = cipher.doFinal(data);
return out;
}
// Base64解码
public static String encryptBASE64(byte[] data) {
Base64.Encoder encoder = Base64.getEncoder();
String encode = encoder.encodeToString(data);
return encode;
}
// Base64编码
public static byte[] decryptBASE64(String data) throws Exception {
Base64.Decoder decoder = Base64.getDecoder();
byte[] buffer = decoder.decode(data);
return buffer;
}
}运行结果
