/// <summary>
/// Decrypts the specified packet buffer.
/// </summary>
/// <param name="packetData">The packet the way it was received.</param>
/// <returns>The decrypted packet data.</returns>
public byte[] DecryptPacket(byte[] packetData)
{
byte[] iv = Sequence.ReadBlock(packetData, 8, 8);
byte[] encryptedData = Sequence.ReadBlock(packetData, 16, packetData.Length - 10 - 16);
byte[] decryptedData = DESEncryption.DecryptData(encryptedData, iv, Key);
int paddingLength = (decryptedData.Last() + 2);
return(Sequence.ReadBlock(decryptedData, 0, decryptedData.Length - paddingLength));
}
/// <summary>
/// Decrypts the specified packet buffer.
/// </summary>
/// <param name="packetData">The packet the way it was received.</param>
/// <returns>The decrypted packet data.</returns>
public byte[] DecryptPacket(byte[] packetData)
{
byte[] iv = Sequence.ReadBlock(packetData, 8, 8);
byte[] encryptedData = Sequence.ReadBlock(packetData, 16, packetData.Length - 10 - 16);
byte[] decryptedData = DESEncryption.DecryptData(encryptedData, iv, Key);
int paddingLength = (decryptedData.Last() + 2);
//System.Console.WriteLine(decryptedData.Length);
//System.Console.WriteLine("padding data length: {0}", paddingLength);
return(Sequence.ReadBlock(decryptedData, 0, decryptedData.Length - paddingLength));
}
/// <summary>
/// Encrypts the given packet payload data.
/// </summary>
/// <param name="payload">The payload data to be encrypted.</param>
/// <param name="iv">The initialization vector (IV).</param>
/// <returns>The encrypted payload data.</returns>
public byte[] EncryptPacket(byte[] payload, byte[] iv)
{
byte[] paddedData = PadData(payload);
return(DESEncryption.EncryptData(paddedData, iv, Key));
}