DES算法的C#解密方法，请大家帮帮忙
在网上看到了尹学渊的DES加密解密工具，写的非常好
网址如下
http://www.cnblogs.com/erwin/archive/2009/04/14/1435288.html
但是我不会用C#解密 主要原因还是对DES算法不太了解，我试着用DESCryptoServiceProvider解密，但在尹学渊的《DES加密解密工具》中没有找到默认密钥向量rgbIV，最后解出来的字符串都是错误的。
这个问题已经折磨我半个月了，还请高手帮帮忙啊，如何写C#代码才能解密 尹学渊的那个《DES加密解密》程序？
如果能给个提示，就非常感激了，谢谢!
我使用的方法如下：
先把十六进制转成String，然后进行比较
//默认密钥向量
private byte[] Keys = { 0xEF, 0xAB, 0x56, 0x78, 0x90, 0x34, 0xCD, 0x12 };
/// <summary>
/// DES加密字符串
/// </summary>
/// <param name="encryptString">待加密的字符串</param>
/// <param name="encryptKey">加密密钥,要求为8位</param>
/// <returns>加密成功返回加密后的字符串，失败返回源串</returns>
public string EncryptDES(string encryptString, string encryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
byte[] rgbIV = Keys;
byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Convert.ToBase64String(mStream.ToArray());
}
catch
{
return encryptString;
}
}
/// <summary>
/// DES解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
/// <returns>解密成功返回解密后的字符串，失败返源串</returns>
public string DecryptDES(string decryptString, string decryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8));
byte[] rgbIV = Keys;
byte[] inputByteArray = Convert.FromBase64String(decryptString);
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Encoding.UTF8.GetString(mStream.ToArray());
}
catch
{
return decryptString;
}
}
/// <summary>
/// 将十六进制串转换为指定编码的字符串
/// </summary>
/// <param name="hex">十六进制串</param>
/// <param name="encode">要转换成的字符串的编码</param>
/// <returns>指定编码的字符串</returns>
public static string ConvertStringFromHex(string hex, Encoding encode)
{
string src = string.Empty;
int len = hex.Length / 2;
byte[] buffer = new byte[len];
for (int i = 0; i < len; i++)
{
buffer[i] = Convert.ToByte(hex.Substring(i * 2, 2), 16);
}
src = encode.GetString(buffer);
return src;
}
