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100 lines
2.4 KiB
C++
100 lines
2.4 KiB
C++
/*
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* Copyright (c) 2020, Ali Mohammad Pur <mpfard@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Types.h>
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#include <LibCrypto/Hash/HashFunction.h>
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#ifndef KERNEL
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# include <AK/DeprecatedString.h>
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#endif
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namespace Crypto::Hash {
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namespace MD5Constants {
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constexpr u32 init_A = 0x67452301;
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constexpr u32 init_B = 0xefcdab89;
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constexpr u32 init_C = 0x98badcfe;
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constexpr u32 init_D = 0x10325476;
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constexpr u32 S11 = 7;
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constexpr u32 S12 = 12;
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constexpr u32 S13 = 17;
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constexpr u32 S14 = 22;
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constexpr u32 S21 = 5;
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constexpr u32 S22 = 9;
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constexpr u32 S23 = 14;
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constexpr u32 S24 = 20;
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constexpr u32 S31 = 4;
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constexpr u32 S32 = 11;
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constexpr u32 S33 = 16;
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constexpr u32 S34 = 23;
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constexpr u32 S41 = 6;
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constexpr u32 S42 = 10;
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constexpr u32 S43 = 15;
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constexpr u32 S44 = 21;
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constexpr u8 PADDING[] = {
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0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0
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};
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}
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class MD5 final : public HashFunction<512, 128> {
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public:
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using HashFunction::update;
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virtual void update(u8 const*, size_t) override;
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virtual DigestType digest() override;
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virtual DigestType peek() override;
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#ifndef KERNEL
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virtual DeprecatedString class_name() const override
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{
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return "MD5";
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}
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#endif
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static DigestType hash(u8 const* data, size_t length)
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{
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MD5 md5;
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md5.update(data, length);
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return md5.digest();
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}
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static DigestType hash(ByteBuffer const& buffer) { return hash(buffer.data(), buffer.size()); }
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static DigestType hash(StringView buffer) { return hash((u8 const*)buffer.characters_without_null_termination(), buffer.length()); }
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virtual void reset() override
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{
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m_A = MD5Constants::init_A;
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m_B = MD5Constants::init_B;
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m_C = MD5Constants::init_C;
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m_D = MD5Constants::init_D;
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m_count[0] = 0;
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m_count[1] = 0;
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__builtin_memset(m_data_buffer, 0, sizeof(m_data_buffer));
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}
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private:
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inline void transform(u8 const*);
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static void encode(u32 const* from, u8* to, size_t length);
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static void decode(u8 const* from, u32* to, size_t length);
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u32 m_A { MD5Constants::init_A }, m_B { MD5Constants::init_B }, m_C { MD5Constants::init_C }, m_D { MD5Constants::init_D };
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u32 m_count[2] { 0, 0 };
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u8 m_data_buffer[64] {};
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};
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}
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