private byte[] xorData; // This table is used for encrypting the server->client stream
#endregion Fields
#region Constructors
public GameEncryption(uint seed)
{
cipherTable = new byte[0x100];
// Set up the crypt key
byte[] key = new byte[16];
key[0] = key[4] = key[8] = key[12] = (byte)((seed >> 24) & 0xff);
key[1] = key[5] = key[9] = key[13] = (byte)((seed >> 16) & 0xff);
key[2] = key[6] = key[10] = key[14] = (byte)((seed >> 8) & 0xff);
key[3] = key[7] = key[11] = key[15] = (byte)(seed & 0xff);
byte[] iv = new byte[0];
engine = new TwofishEncryption(128, ref key, ref iv, CipherMode.ECB, TwofishBase.EncryptionDirection.Decrypting);
// Initialize table
for ( int i = 0; i < 256; ++i )
cipherTable[i] = (byte)i;
sendPos = 0;
// We need to fill the table initially to calculate the MD5 hash of it
refreshCipherTable();
// Create a MD5 hash of the twofish crypt data and use it as a 16-byte xor table
// for encrypting the server->client stream.
MD5 md5 = new MD5CryptoServiceProvider();
xorData = md5.ComputeHash(cipherTable);
}
private byte[] xorData; // This table is used for encrypting the server->client stream
public GameEncryption(uint seed)
{
cipherTable = new byte[0x100];
// Set up the crypt key
byte[] key = new byte[16];
key[0] = key[4] = key[8] = key[12] = (byte)((seed >> 24) & 0xff);
key[1] = key[5] = key[9] = key[13] = (byte)((seed >> 16) & 0xff);
key[2] = key[6] = key[10] = key[14] = (byte)((seed >> 8) & 0xff);
key[3] = key[7] = key[11] = key[15] = (byte)(seed & 0xff);
byte[] iv = new byte[0];
engine = new TwofishEncryption(128, ref key, ref iv, CipherMode.ECB, TwofishBase.EncryptionDirection.Decrypting);
// Initialize table
for (int i = 0; i < 256; ++i)
{
cipherTable[i] = (byte)i;
}
sendPos = 0;
// We need to fill the table initially to calculate the MD5 hash of it
refreshCipherTable();
// Create a MD5 hash of the twofish crypt data and use it as a 16-byte xor table
// for encrypting the server->client stream.
MD5 md5 = new MD5CryptoServiceProvider();
xorData = md5.ComputeHash(cipherTable);
}