mirror of
https://gitcode.com/GitHub_Trending/az/azerothcore-wotlk.git
synced 2026-07-11 03:13:10 +00:00
Kitzunu
108 lines
3.6 KiB
C++
108 lines
3.6 KiB
C++
/*
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* Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
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* Copyright (C) 2008-2021 TrinityCore <http://www.trinitycore.org/>
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*/
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#ifndef AZEROTHCORE_CRYPTOHASH_H
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#define AZEROTHCORE_CRYPTOHASH_H
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#include "CryptoConstants.h"
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#include "Define.h"
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#include "Errors.h"
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#include <array>
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#include <string>
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#include <string_view>
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#include <openssl/evp.h>
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class BigNumber;
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namespace Acore::Impl
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{
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struct GenericHashImpl
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{
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typedef EVP_MD const* (*HashCreator)();
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#if defined(OPENSSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x10100000L
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static EVP_MD_CTX* MakeCTX() { return EVP_MD_CTX_create(); }
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static void DestroyCTX(EVP_MD_CTX* ctx) { EVP_MD_CTX_destroy(ctx); }
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#else
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static EVP_MD_CTX* MakeCTX() { return EVP_MD_CTX_new(); }
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static void DestroyCTX(EVP_MD_CTX* ctx) { EVP_MD_CTX_free(ctx); }
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#endif
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};
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template <GenericHashImpl::HashCreator HashCreator, size_t DigestLength>
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class GenericHash
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{
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public:
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static constexpr size_t DIGEST_LENGTH = DigestLength;
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using Digest = std::array<uint8, DIGEST_LENGTH>;
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static Digest GetDigestOf(uint8 const* data, size_t len)
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{
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GenericHash hash;
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hash.UpdateData(data, len);
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hash.Finalize();
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return hash.GetDigest();
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}
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template <typename... Ts>
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static auto GetDigestOf(Ts&&... pack) -> std::enable_if_t<!(std::is_integral_v<std::decay_t<Ts>> || ...), Digest>
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{
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GenericHash hash;
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(hash.UpdateData(std::forward<Ts>(pack)), ...);
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hash.Finalize();
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return hash.GetDigest();
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}
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GenericHash() : _ctx(GenericHashImpl::MakeCTX())
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{
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int result = EVP_DigestInit_ex(_ctx, HashCreator(), nullptr);
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ASSERT(result == 1);
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}
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~GenericHash()
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{
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if (!_ctx)
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return;
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GenericHashImpl::DestroyCTX(_ctx);
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_ctx = nullptr;
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}
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void UpdateData(uint8 const* data, size_t len)
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{
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int result = EVP_DigestUpdate(_ctx, data, len);
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ASSERT(result == 1);
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}
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void UpdateData(std::string_view str) { UpdateData(reinterpret_cast<uint8 const*>(str.data()), str.size()); }
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void UpdateData(std::string const& str) { UpdateData(std::string_view(str)); } /* explicit overload to avoid using the container template */
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void UpdateData(char const* str) { UpdateData(std::string_view(str)); } /* explicit overload to avoid using the container template */
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template <typename Container>
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void UpdateData(Container const& c) { UpdateData(std::data(c), std::size(c)); }
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void Finalize()
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{
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uint32 length;
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int result = EVP_DigestFinal_ex(_ctx, _digest.data(), &length);
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ASSERT(result == 1);
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ASSERT(length == DIGEST_LENGTH);
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GenericHashImpl::DestroyCTX(_ctx);
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_ctx = nullptr;
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}
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Digest const& GetDigest() const { return _digest; }
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private:
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EVP_MD_CTX* _ctx;
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Digest _digest = { };
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};
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}
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namespace Acore::Crypto
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{
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using SHA1 = Acore::Impl::GenericHash<EVP_sha1, Constants::SHA1_DIGEST_LENGTH_BYTES>;
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using SHA256 = Acore::Impl::GenericHash<EVP_sha256, Constants::SHA256_DIGEST_LENGTH_BYTES>;
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}
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#endif
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