}//end method
/// <summary>
/// 3des解密字符串
/// </summary>
/// <param name="text">要解密的字符串</param>
/// <param name="key">密钥</param>
/// <returns>解密后的字符串</returns>
/// <exception cref="">密钥错误</exception>
/// <remarks>静态方法，采用默认ascii编码</remarks>
public static string Decrypt(string text, string key)
{
TripleDESCryptoServiceProvider DES = new
TripleDESCryptoServiceProvider();
MD5CryptoServiceProvider hashMD5 = new MD5CryptoServiceProvider();
DES.Key = hashMD5.ComputeHash(ASCIIEncoding.ASCII.GetBytes(key));
DES.Mode = CipherMode.ECB;
ICryptoTransform DESDecrypt = DES.CreateDecryptor();
string result = "";
try
{
byte[] Buffer = Base64Helper.FromBase64String(text);
result = ASCIIEncoding.UTF8.GetString(DESDecrypt.TransformFinalBlock
(Buffer, 0, Buffer.Length));
}
catch
{
return(text);
}
return(result);
}
public static string Base64Decode(string source)
{
byte[] barray = Base64Helper.FromBase64String(source);
return(Encoding.Default.GetString(barray));
}