/// <summary>
/// 3des加密字符串
/// </summary>
/// <param name="text">要加密的字符串</param>
/// <param name="key">密钥</param>
/// <returns>加密后并经base64编码的字符串</returns>
/// <remarks>静态方法，采用默认ascii编码</remarks>
public static string Encrypt(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 DESEncrypt = DES.CreateEncryptor();
byte[] Buffer = ASCIIEncoding.UTF8.GetBytes(text);
string pass = Base64Helper.ToBase64String(DESEncrypt.TransformFinalBlock
(Buffer, 0, Buffer.Length));
return(pass);
}//end method
public static string Base64Decode(string source)
{
byte[] barray = Base64Helper.FromBase64String(source);
return(Encoding.Default.GetString(barray));
}
public static string Base64Encode(string source)
{
byte[] barray = Encoding.Default.GetBytes(source);
return(Base64Helper.ToBase64String(barray));
}