src/shared/Auth/AuthCrypt.cpp

   1 /*
   2  * Copyright (C) 2005-2010 MaNGOS <http://getmangos.com/>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #include "AuthCrypt.h"
  20 #include "Hmac.h"
  21 #include "Log.h"
  22 #include "BigNumber.h"
  23
  24 AuthCrypt::AuthCrypt()
  25 {
  26     _initialized = false;
  27 }
  28
  29 AuthCrypt::~AuthCrypt()
  30 {
  31
  32 }
  33
  34 void AuthCrypt::Init(BigNumber *K)
  35 {
  36     uint8 ServerEncryptionKey[SEED_KEY_SIZE] = { 0x22, 0xBE, 0xE5, 0xCF, 0xBB, 0x07, 0x64, 0xD9, 0x00, 0x45, 0x1B, 0xD0, 0x24, 0xB8, 0xD5, 0x45 };
  37     HmacHash serverEncryptHmac(SEED_KEY_SIZE, (uint8*)ServerEncryptionKey);
  38     uint8 *encryptHash = serverEncryptHmac.ComputeHash(K);
  39
  40     uint8 ServerDecryptionKey[SEED_KEY_SIZE] = { 0xF4, 0x66, 0x31, 0x59, 0xFC, 0x83, 0x6E, 0x31, 0x31, 0x02, 0x51, 0xD5, 0x44, 0x31, 0x67, 0x98 };
  41     HmacHash clientDecryptHmac(SEED_KEY_SIZE, (uint8*)ServerDecryptionKey);
  42     uint8 *decryptHash = clientDecryptHmac.ComputeHash(K);
  43
  44     //SARC4 _serverDecrypt(encryptHash);
  45     _clientDecrypt.Init(decryptHash);
  46     _serverEncrypt.Init(encryptHash);
  47     //SARC4 _clientEncrypt(decryptHash);
  48
  49     uint8 syncBuf[1024];
  50
  51     memset(syncBuf, 0, 1024);
  52
  53     _serverEncrypt.UpdateData(1024, syncBuf);
  54     //_clientEncrypt.UpdateData(1024, syncBuf);
  55
  56     memset(syncBuf, 0, 1024);
  57
  58     //_serverDecrypt.UpdateData(1024, syncBuf);
  59     _clientDecrypt.UpdateData(1024, syncBuf);
  60
  61     _initialized = true;
  62 }
  63
  64 void AuthCrypt::DecryptRecv(uint8 *data, size_t len)
  65 {
  66     if (!_initialized)
  67         return;
  68
  69     _clientDecrypt.UpdateData(len, data);
  70 }
  71
  72 void AuthCrypt::EncryptSend(uint8 *data, size_t len)
  73 {
  74     if (!_initialized)
  75         return;
  76
  77     _serverEncrypt.UpdateData(len, data);
  78 }