132 lines
4.3 KiB
C++
132 lines
4.3 KiB
C++
/*
|
|
* This file is part of the AzerothCore Project. See AUTHORS file for Copyright information
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU Affero General Public License as published by the
|
|
* Free Software Foundation; either version 3 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef AZEROTHCORE_HMAC_H
|
|
#define AZEROTHCORE_HMAC_H
|
|
|
|
#include "CryptoConstants.h"
|
|
#include "Define.h"
|
|
#include "Errors.h"
|
|
#include <array>
|
|
#include <openssl/hmac.h>
|
|
#include <string>
|
|
#include <string_view>
|
|
|
|
class BigNumber;
|
|
|
|
namespace Acore::Impl
|
|
{
|
|
struct HMACImpl
|
|
{
|
|
typedef EVP_MD const* (*HashCreator)();
|
|
|
|
#if defined(OPENSSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x10100000L
|
|
static HMAC_CTX* MakeCTX()
|
|
{
|
|
HMAC_CTX* ctx = new HMAC_CTX();
|
|
HMAC_CTX_init(ctx);
|
|
return ctx;
|
|
}
|
|
|
|
static void DestroyCTX(HMAC_CTX* ctx)
|
|
{
|
|
HMAC_CTX_cleanup(ctx);
|
|
delete ctx;
|
|
}
|
|
#else
|
|
static HMAC_CTX* MakeCTX() { return HMAC_CTX_new(); }
|
|
static void DestroyCTX(HMAC_CTX* ctx) { HMAC_CTX_free(ctx); }
|
|
#endif
|
|
};
|
|
|
|
template <HMACImpl::HashCreator HashCreator, size_t DigestLength>
|
|
class GenericHMAC
|
|
{
|
|
public:
|
|
static constexpr size_t DIGEST_LENGTH = DigestLength;
|
|
using Digest = std::array<uint8, DIGEST_LENGTH>;
|
|
|
|
template <typename Container>
|
|
static Digest GetDigestOf(Container const& seed, uint8 const* data, size_t len)
|
|
{
|
|
GenericHMAC hash(seed);
|
|
hash.UpdateData(data, len);
|
|
hash.Finalize();
|
|
return hash.GetDigest();
|
|
}
|
|
|
|
template <typename Container, typename... Ts>
|
|
static auto GetDigestOf(Container const& seed, Ts&& ... pack) -> std::enable_if_t < !(std::is_integral_v<std::decay_t<Ts>> || ...), Digest >
|
|
{
|
|
GenericHMAC hash(seed);
|
|
(hash.UpdateData(std::forward<Ts>(pack)), ...);
|
|
hash.Finalize();
|
|
return hash.GetDigest();
|
|
}
|
|
|
|
GenericHMAC(uint8 const* seed, size_t len) : _ctx(HMACImpl::MakeCTX())
|
|
{
|
|
int result = HMAC_Init_ex(_ctx, seed, len, HashCreator(), nullptr);
|
|
ASSERT(result == 1);
|
|
}
|
|
template <typename Container> GenericHMAC(Container const& container) : GenericHMAC(std::data(container), std::size(container)) {}
|
|
|
|
~GenericHMAC()
|
|
{
|
|
if (!_ctx)
|
|
{
|
|
return;
|
|
}
|
|
HMACImpl::DestroyCTX(_ctx);
|
|
_ctx = nullptr;
|
|
}
|
|
|
|
void UpdateData(uint8 const* data, size_t len)
|
|
{
|
|
int result = HMAC_Update(_ctx, data, len);
|
|
ASSERT(result == 1);
|
|
}
|
|
void UpdateData(std::string_view str) { UpdateData(reinterpret_cast<uint8 const*>(str.data()), str.size()); }
|
|
void UpdateData(std::string const& str) { UpdateData(std::string_view(str)); } /* explicit overload to avoid using the container template */
|
|
void UpdateData(char const* str) { UpdateData(std::string_view(str)); } /* explicit overload to avoid using the container template */
|
|
template <typename Container>
|
|
void UpdateData(Container const& c) { UpdateData(std::data(c), std::size(c)); }
|
|
|
|
void Finalize()
|
|
{
|
|
uint32 length = 0;
|
|
int result = HMAC_Final(_ctx, _digest.data(), &length);
|
|
ASSERT(result == 1);
|
|
ASSERT(length == DIGEST_LENGTH);
|
|
HMACImpl::DestroyCTX(_ctx);
|
|
_ctx = nullptr;
|
|
}
|
|
|
|
Digest const& GetDigest() const { return _digest; }
|
|
private:
|
|
HMAC_CTX* _ctx;
|
|
Digest _digest = { };
|
|
};
|
|
}
|
|
|
|
namespace Acore::Crypto
|
|
{
|
|
using HMAC_SHA1 = Acore::Impl::GenericHMAC<EVP_sha1, Constants::SHA1_DIGEST_LENGTH_BYTES>;
|
|
using HMAC_SHA256 = Acore::Impl::GenericHMAC<EVP_sha256, Constants::SHA256_DIGEST_LENGTH_BYTES>;
|
|
}
|
|
#endif
|