mirror of https://github.com/tfussell/xlnt
110 lines
3.0 KiB
C++
110 lines
3.0 KiB
C++
// Copyright (c) 2017-2021 Thomas Fussell
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE
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//
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// @license: http://www.opensource.org/licenses/mit-license.php
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// @author: see AUTHORS file
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#include <algorithm>
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#include <array>
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#include <cstring>
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#include <iomanip>
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#include <sstream>
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#include <string>
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#include <detail/cryptography/sha.hpp>
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extern "C" {
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extern void sha1_hash(const uint8_t *message, size_t len, uint32_t hash[5]);
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extern void sha512_hash(const uint8_t *message, size_t len, uint64_t hash[8]);
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}
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namespace {
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#ifdef _MSC_VER
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inline std::uint32_t byteswap32(std::uint32_t i)
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{
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return _byteswap_ulong(i);
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}
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inline std::uint64_t byteswap64(std::uint64_t i)
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{
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return _byteswap_uint64(i);
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}
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#else
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inline std::uint32_t byteswap32(std::uint32_t i)
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{
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return __builtin_bswap32(i);
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}
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inline std::uint64_t byteswap64(std::uint64_t i)
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{
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return __builtin_bswap64(i);
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}
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#endif
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void byteswap(std::uint32_t *arr, std::size_t len)
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{
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for (auto i = std::size_t(0); i < len; ++i)
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{
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arr[i] = byteswap32(arr[i]);
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}
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}
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void byteswap(std::uint64_t *arr, std::size_t len)
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{
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for (auto i = std::size_t(0); i < len; ++i)
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{
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arr[i] = byteswap64(arr[i]);
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}
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}
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} // namespace
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namespace xlnt {
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namespace detail {
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void sha1(const std::vector<std::uint8_t> &input, std::vector<std::uint8_t> &output)
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{
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static const auto sha1_bytes = 20;
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output.resize(sha1_bytes);
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auto output_pointer_u32 = reinterpret_cast<std::uint32_t *>(output.data());
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sha1_hash(input.data(), input.size(), output_pointer_u32);
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byteswap(output_pointer_u32, sha1_bytes / sizeof(std::uint32_t));
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}
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void sha512(const std::vector<std::uint8_t> &input, std::vector<std::uint8_t> &output)
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{
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static const auto sha512_bytes = 64;
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output.resize(sha512_bytes);
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auto output_pointer_u64 = reinterpret_cast<std::uint64_t *>(output.data());
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sha512_hash(input.data(), input.size(), output_pointer_u64);
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byteswap(output_pointer_u64, sha512_bytes / sizeof(std::uint64_t));
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}
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} // namespace detail
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} // namespace xlnt
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