android 与C# 服务端DES加密解密不一致

[daniel_113]

为什么我在android客户端写的DES加密算法跟服务端解密的永远不一致。服务端是C#写的解密程序。参考了大量网上说的那些方式，都不行。能帮个忙吗，谢谢！
服务端加密是这样的，

public static string EncryptString(string sourceString, string sKey)
{
// string pToEncrypt1 = HttpContext.Current.Server.UrlEncode(pToEncrypt);
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = Encoding.GetEncoding("UTF-8").GetBytes(sourceString);


//建立加密对象的密钥和偏移量
//原文使用ASCIIEncoding.ASCII方法的GetBytes方法
//使得输入密码必须输入英文文本
des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
des.IV = ASCIIEncoding.ASCII.GetBytes("12345678");
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);


cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();




return Convert.ToBase64String(ms.ToArray());
}

[JavaNet的牛肉粉丝]

private String getMD5Str(String str) { MessageDigest messageDigest = null; try { messageDigest = MessageDigest.getInstance("MD5"); messageDigest.reset(); messageDigest.update(str.getBytes("UTF-8")); } catch (NoSuchAlgorithmException e) { System.out.println("NoSuchAlgorithmException caught!"); System.exit(-1); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } byte[] byteArray = messageDigest.digest(); StringBuffer md5StrBuff = new StringBuffer(); for (int i = 0; i < byteArray.length; i++) { if (Integer.toHexString(0xFF & byteArray[i]).length() == 1) md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i])); else md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i])); } //16位加密，从第9位到25位 return md5StrBuff.substring(8, 24).toString().toUpperCase(); }