C# 与Java 通信DES 加密/解密

[b]C#[/b]
EncryptString("42728ff2118430bdff5f9a189e0034ec","4;13pew*");

//DES加密
public string EncryptString(string sinputString, string Skey) {
byte[] data = Encoding.UTF8.GetBytes(sinputString);
DESCryptoServiceProvider DES = new DESCryptoServiceProvider();
DES.Key = ASCIIEncoding.ASCII.GetBytes(Skey);
DES.IV = ASCIIEncoding.ASCII.GetBytes(Skey);
//DES.Mode = CipherMode.ECB;
[b][color=darkred]DES.Mode = CipherMode.CBC;
DES.Padding = PaddingMode.PKCS7;//补位[/color][/b]

ICryptoTransform desEncrypt = DES.CreateEncryptor();
byte[] result = desEncrypt.TransformFinalBlock(data, 0, data.Length);
return System.Convert.ToBase64String(result);
}
//////////////////////////////////////////////////////////////////////////////////
[b]Java[/b]
//DES 解密
public static String decrypt(String data) throws IOException, Exception {
if (data == null)
return null;
BASE64Decoder decoder = new BASE64Decoder();
byte[] buf = decoder.decodeBuffer(data);
byte[] bt = decrypt(buf, KEY.getBytes("UTF-8"));
return new String(bt);
}

private static byte[] decrypt(byte[] data, byte[] key) throws Exception {
// 生成一个可信任的随机数源
[b][color=darkred] IvParameterSpec iv = new IvParameterSpec(key); [/color][/b]
// 从原始密钥数据创建DESKeySpec对象
DESKeySpec dks = new DESKeySpec(key);

// 创建一个密钥工厂，然后用它把DESKeySpec转换成SecretKey对象
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey securekey = keyFactory.generateSecret(dks);

// Cipher对象实际完成解密操作
[b][color=darkred] Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");[/color][/b]

// 用密钥初始化Cipher对象
cipher.init(Cipher.DECRYPT_MODE, securekey,iv);

return cipher.doFinal(data);

}

参照:http://www.cnblogs.com/Lawson/archive/2012/05/20/2510781.html