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Description: using System;
using System.Collections.Generic;
using System.Text;
namespace NewestCOServer
{
public class Cryption
{
class CryptCounter
{
UInt16 m_Counter = 0;
public byte Key2
{
get { return (byte)(m_Counter >> 8); }
}
public byte Key1
{
get { return (byte)(m_Counter & 0xFF); }
}
public void Increment()
{
m_Counter++;
}
}
private CryptCounter _decryptCounter;
private CryptCounter _encryptCounter;
private byte[] _cryptKey1;
private byte[] _cryptKey2;
private byte[] _cryptKey3;
private byte[] _cryptKey4;
private bool Decrypt2 = false;
public Cryption()
{
_decryptCounter = new CryptCounter();
_encryptCounter = new CryptCounter();
_cryptKey1 = new byte[0x100];
_cryptKey2 = new byte[0x100];
byte i_key1 = 0x9D;
byte i_key2 = 0x62;
for (int i = 0; i 4 | buffer[i] < 4 | buffer[i] < 4 | buffer[i] << 4);
buffer[i] ^= (byte)(_cryptKey4[_decryptCounter.Key2] ^ _cryptKey3[_decryptCounter.Key1]);
_decryptCounter.Increment();
}
}
}
public void GenerateKeys(UInt32 CryptoKey, UInt32 AccountID)
{
UInt32 tmpkey1 = 0, tmpkey2 = 0;
tmpkey1 = ((CryptoKey + AccountID) ^ (0x4321)) ^ CryptoKey;
tmpkey2 = tmpkey1 * tmpkey1;
_cryptKey3 = new byte[256];
_cryptKey4 = new byte[256];
for (int i = 0; i < 256; i++)
{
int right = ((3 - (i % 4)) * 8);
int left = ((i % 4)) * 8 + right;
_cryptKey3[i] = (byte)(_cryptKey1[i] ^ tmpkey1 left);
_cryptKey4[i] = (byte)(_cryptKey2[i] ^ tmpkey2 left);
}
Decrypt2 = true;
}
public void GenerateKeys2(byte[] InKey1, byte[] InKey2)
{
byte[] addKey1 = new byte[4];
byte[] addKey2 = new byte[4];
byte[] addResult = new byte[4];
//addKey1.i = 0;
//addKey2.i = 0;
byte[] tempKey = new byte[4];
long LMULer;
// InKey1[0] = 0x20;
// InKey1[1] = 0x5c;
// InKey1[2] = 0x48;
// InKey1[3] = 0xf4;
// InKey2[0] = 0x00;
// InKey2[1] = 0x44;
// InKey2[2] = 0xa6;
// InKey2[3] = 0x2e;
//if (Key3) delete [] Key3;
//if (Key4) delete [] Key4;
_cryptKey3 = new byte[256];
_cryptKey4 = new byte[256];
for (int x = 0; x < 4; x++)
{
addKey1[x] = InKey1[3 - x];
addKey2[x] = InKey2[3 - x];
}
//cout << "Key1: " << addKey1.i << endl;
//cout << "Key2: " << addKey2.i << endl;
uint Adder1;
uint Adder2;
uint Adder3;
Adder1 = (uint)((addKey1[3] << 24) | (addKey1[2] << 16) | (addKey1[1] << 8) | (addKey1[0]));
Adder2 = (uint)((addKey2[3] << 24) | (addKey2[2] << 16) | (addKey2[1] 8) & 0xff);
addResult[2] = (byte)((Adder3 >> 16) & 0xff);
addResult[3] = (byte)((Adder3 >> 24) & 0xff);
for (int b = 3; b >= 0; b--)
{
// printf("%.2x ", addResult.c[b]);
tempKey[3 - b] = addResult[b];
}
tempKey[2] = (byte)(tempKey[2] ^ (byte)0x43);
tempKey[3] = (byte)(tempKey[3] ^ (byte)0x21);
for (int b = 0; b < 4; b++)
{
tempKey[b] = (byte)(tempKey[b] ^ InKey1[b]);
}
//Build the 3rd Key
for (int b = 0; b < 256; b++)
{
_cryptKey3[b] = (byte)(tempKey[3 - (b % 4)] ^ _cryptKey1[b]);
}
for (int x = 0; x < 4; x++)
{
addResult[x] = tempKey[3 - x];
}
Adder3 = (uint)((addResult[3] << 24) | (addResult[2] << 16) | (addResult[1] << 8) | (addResult[0]));
LMULer = Adder3 * Adder3;
LMULer = LMULer 32;
Adder3 = Convert.ToUInt32(LMULer & 0xffffffff);
addResult[0] = (byte)(Adder3 & 0xff);
addResult[1] = (byte)((Adder3 >> 8) & 0xff);
addResult[2] = (byte)((Adder3 >> 16) & 0xff);
addResult[3] = (byte)((Adder3 >> 24) & 0xff);
for (int b = 3; b >= 0; b--)
{
tempKey[3 - b] = addResult[b];
}
//Build the 4th Key
for (int b = 0; b < 256; b++)
{
_cryptKey4[b] = Convert.ToByte(tempKey[3 - (b % 4)] ^ _cryptKey2[b]);
}
Decrypt2 = true;
//cout << "Int representation: " << charadd.i << endl;
}
}
}
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