mirror of
https://github.com/araxiaonline/TrinityCore.git
synced 2026-06-13 19:53:02 -04:00
85 lines
2.4 KiB
C++
85 lines
2.4 KiB
C++
/*
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* This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "WorldPacketCrypt.h"
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#include <array>
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#include <cstring>
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WorldPacketCrypt::WorldPacketCrypt() : _clientDecrypt(false), _serverEncrypt(true), _clientCounter(0), _serverCounter(0), _initialized(false)
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{
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}
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void WorldPacketCrypt::Init(Trinity::Crypto::AES::Key const& key)
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{
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_clientDecrypt.Init(key);
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_serverEncrypt.Init(key);
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_initialized = true;
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}
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struct WorldPacketCryptIV
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{
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WorldPacketCryptIV(uint64 counter, uint32 magic)
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{
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memcpy(Value.data(), &counter, sizeof(uint64));
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memcpy(Value.data() + sizeof(uint64), &magic, sizeof(uint32));
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}
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std::array<uint8, 12> Value;
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};
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bool WorldPacketCrypt::PeekDecryptRecv(uint8* data, size_t length)
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{
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if (_initialized)
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{
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WorldPacketCryptIV iv{ _clientCounter, 0x544E4C43 };
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if (!_clientDecrypt.ProcessNoIntegrityCheck(iv.Value, data, length))
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return false;
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}
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return true;
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}
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bool WorldPacketCrypt::DecryptRecv(uint8* data, size_t length, Trinity::Crypto::AES::Tag& tag)
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{
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if (_initialized)
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{
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WorldPacketCryptIV iv{ _clientCounter, 0x544E4C43 };
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if (!_clientDecrypt.Process(iv.Value, data, length, tag))
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return false;
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}
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else
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memset(tag, 0, sizeof(tag));
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++_clientCounter;
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return true;
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}
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bool WorldPacketCrypt::EncryptSend(uint8* data, size_t length, Trinity::Crypto::AES::Tag& tag)
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{
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if (_initialized)
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{
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WorldPacketCryptIV iv{ _serverCounter, 0x52565253 };
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if (!_serverEncrypt.Process(iv.Value, data, length, tag))
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return false;
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}
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else
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memset(tag, 0, sizeof(tag));
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++_serverCounter;
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return true;
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}
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