/// <summary>
/// Decrypts hexadecimal data using a DES key.
/// </summary>
/// <param name="key">DES key to use with the decrypt operation.</param>
/// <param name="data">Hexadecimal data to decrypt.</param>
/// <returns>Decrypted hexadecimal data.</returns>
public static string Decrypt(DESKey key, string data)
{
return(DESDecrypt(key.FirstKeyPart.ToString().HexToByteArray(),
DESEncrypt(key.SecondKeyPart.ToString().HexToByteArray(),
DESDecrypt(key.ThirdKeyPart.ToString().HexToByteArray(), data.HexToByteArray()))
).ByteArrayToHex());
}
/// <summary>
/// Decrypts hexadecimal data using a single-length DES key.
/// </summary>
/// <param name="key">DES key to use with the decrypt operation.</param>
/// <param name="data">Hexadecimal data to decrypt.</param>
/// <returns>Decrypted hexadecimal data.</returns>
private static string DESDecrypt(DESKey key, String data)
{
return(DESDecrypt(key.FirstKeyPart.ToString().HexToByteArray(), data.HexToByteArray()).ByteArrayToHex());
}
