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109 lines
3.4 KiB
C++
109 lines
3.4 KiB
C++
/*
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* Copyright (c) 2020, Ali Mohammad Pur <ali.mpfard@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/String.h>
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#include <LibCrypto/Hash/HashFunction.h>
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namespace Crypto {
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namespace Hash {
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namespace SHA1Constants {
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constexpr static u32 InitializationHashes[5] { 0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476, 0xC3D2E1F0 };
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constexpr static u32 RoundConstants[4] {
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0X5a827999,
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0X6ed9eba1,
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0X8f1bbcdc,
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0Xca62c1d6,
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};
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}
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template<size_t Bytes>
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struct SHA1Digest {
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u8 data[Bytes];
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constexpr static size_t Size = Bytes;
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const u8* immutable_data() const { return data; }
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size_t data_length() { return Bytes; }
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};
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class SHA1 final : public HashFunction<512, SHA1Digest<160 / 8>> {
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public:
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SHA1()
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{
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reset();
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}
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virtual void update(const u8*, size_t) override;
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virtual void update(const ByteBuffer& buffer) override { update(buffer.data(), buffer.size()); };
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virtual void update(const StringView& string) override { update((const u8*)string.characters_without_null_termination(), string.length()); };
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virtual DigestType digest() override;
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virtual DigestType peek() override;
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inline static DigestType hash(const u8* data, size_t length)
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{
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SHA1 sha;
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sha.update(data, length);
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return sha.digest();
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}
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inline static DigestType hash(const ByteBuffer& buffer) { return hash(buffer.data(), buffer.size()); }
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inline static DigestType hash(const StringView& buffer) { return hash((const u8*)buffer.characters_without_null_termination(), buffer.length()); }
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virtual String class_name() const override
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{
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return "SHA1";
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};
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inline virtual void reset() override
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{
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m_data_length = 0;
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m_bit_length = 0;
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for (auto i = 0; i < 5; ++i)
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m_state[i] = SHA1Constants::InitializationHashes[i];
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}
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private:
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inline void transform(const u8*);
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u8 m_data_buffer[BlockSize];
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size_t m_data_length { 0 };
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u64 m_bit_length { 0 };
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u32 m_state[5];
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constexpr static auto FinalBlockDataSize = BlockSize - 8;
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constexpr static auto Rounds = 80;
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};
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}
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}
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