mirror of
https://github.com/azerothcore/azerothcore-wotlk.git
synced 2025-12-05 18:20:24 -08:00
65 lines
2 KiB
C++
65 lines
2 KiB
C++
/*
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* This file is part of the AzerothCore 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
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your 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 "AES.h"
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#include "Errors.h"
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#include <limits>
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Acore::Crypto::AES::AES(bool encrypting) : _ctx(EVP_CIPHER_CTX_new()), _encrypting(encrypting)
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{
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EVP_CIPHER_CTX_init(_ctx);
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int status = EVP_CipherInit_ex(_ctx, EVP_aes_128_gcm(), nullptr, nullptr, nullptr, _encrypting ? 1 : 0);
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ASSERT(status);
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}
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Acore::Crypto::AES::~AES()
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{
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EVP_CIPHER_CTX_free(_ctx);
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}
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void Acore::Crypto::AES::Init(Key const& key)
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{
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int status = EVP_CipherInit_ex(_ctx, nullptr, nullptr, key.data(), nullptr, -1);
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ASSERT(status);
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}
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bool Acore::Crypto::AES::Process(IV const& iv, uint8* data, std::size_t length, Tag& tag)
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{
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ASSERT(length <= static_cast<size_t>(std::numeric_limits<int>::max()));
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int len = static_cast<int>(length);
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if (!EVP_CipherInit_ex(_ctx, nullptr, nullptr, nullptr, iv.data(), -1))
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return false;
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int outLen;
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if (!EVP_CipherUpdate(_ctx, data, &outLen, data, len))
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return false;
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len -= outLen;
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if (!_encrypting && !EVP_CIPHER_CTX_ctrl(_ctx, EVP_CTRL_GCM_SET_TAG, sizeof(tag), tag))
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return false;
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if (!EVP_CipherFinal_ex(_ctx, data + outLen, &outLen))
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return false;
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ASSERT(len == outLen);
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if (_encrypting && !EVP_CIPHER_CTX_ctrl(_ctx, EVP_CTRL_GCM_GET_TAG, sizeof(tag), tag))
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return false;
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return true;
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}
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