private static void Encrypt()
{
var ice = new IceKey(2);
ice.Set(new byte[] { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 });
using (var reader = new BinaryReader(File.OpenRead("plain.txt")))
{
byte[] temp = new byte[reader.BaseStream.Length];
int bytesLeft = (int)reader.BaseStream.Length;
while (bytesLeft >= 8)
{
byte[] tmp = new byte[8];
byte[] buffer = reader.ReadBytes(8);
ice.Encrypt(buffer, ref tmp);
bytesLeft -= 8;
Array.Copy(tmp, temp, 8);
}
File.WriteAllBytes("out.ice", temp);
}
}
private static void DecipherPayload(byte[] payload)
{
var ice = new IceKey(2);
ice.Set(iceKey);
var blockSize = ice.BlockSize();
var ciphertextBlock = new byte[blockSize];
var plaintextBlock = new byte[blockSize];
using (var plaintext = new MemoryStream(payload.Length))
{
using (var ciphertext = new MemoryStream(payload))
{
while (true)
{
var bytesRead = ciphertext.Read(ciphertextBlock, 0, blockSize);
if (bytesRead < blockSize)
{
// The end is not ciphered !?!?
plaintext.Write(ciphertextBlock, 0, bytesRead);
break;
}
ice.Decrypt(ciphertextBlock, ref plaintextBlock);
plaintext.Write(plaintextBlock, 0, blockSize);
}
}
plaintext.Seek(0, SeekOrigin.Begin);
var plaintextData = plaintext.ToArray();
GetOnlyValidMsg(plaintextData, payload.Length);
}
}
