mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 01:52:43 +00:00
264 lines
9.2 KiB
C++
264 lines
9.2 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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#include <AK/Types.h>
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#include <LibCrypto/Hash/SHA2.h>
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namespace Crypto {
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namespace Hash {
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constexpr inline static auto ROTRIGHT(u32 a, size_t b) { return (a >> b) | (a << (32 - b)); }
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constexpr inline static auto CH(u32 x, u32 y, u32 z) { return (x & y) ^ (z & ~x); }
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constexpr inline static auto MAJ(u32 x, u32 y, u32 z) { return (x & y) ^ (x & z) ^ (y & z); }
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constexpr inline static auto EP0(u32 x) { return ROTRIGHT(x, 2) ^ ROTRIGHT(x, 13) ^ ROTRIGHT(x, 22); }
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constexpr inline static auto EP1(u32 x) { return ROTRIGHT(x, 6) ^ ROTRIGHT(x, 11) ^ ROTRIGHT(x, 25); }
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constexpr inline static auto SIGN0(u32 x) { return ROTRIGHT(x, 7) ^ ROTRIGHT(x, 18) ^ (x >> 3); }
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constexpr inline static auto SIGN1(u32 x) { return ROTRIGHT(x, 17) ^ ROTRIGHT(x, 19) ^ (x >> 10); }
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constexpr inline static auto ROTRIGHT(u64 a, size_t b) { return (a >> b) | (a << (64 - b)); }
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constexpr inline static auto CH(u64 x, u64 y, u64 z) { return (x & y) ^ (z & ~x); }
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constexpr inline static auto MAJ(u64 x, u64 y, u64 z) { return (x & y) ^ (x & z) ^ (y & z); }
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constexpr inline static auto EP0(u64 x) { return ROTRIGHT(x, 28) ^ ROTRIGHT(x, 34) ^ ROTRIGHT(x, 39); }
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constexpr inline static auto EP1(u64 x) { return ROTRIGHT(x, 14) ^ ROTRIGHT(x, 18) ^ ROTRIGHT(x, 41); }
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constexpr inline static auto SIGN0(u64 x) { return ROTRIGHT(x, 1) ^ ROTRIGHT(x, 8) ^ (x >> 7); }
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constexpr inline static auto SIGN1(u64 x) { return ROTRIGHT(x, 19) ^ ROTRIGHT(x, 61) ^ (x >> 6); }
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inline void SHA256::transform(const u8* data)
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{
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u32 m[64];
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size_t i = 0;
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for (size_t j = 0; i < 16; ++i, j += 4) {
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m[i] = (data[j] << 24) | (data[j + 1] << 16) | (data[j + 2] << 8) | data[j + 3];
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}
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for (; i < BlockSize; ++i) {
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m[i] = SIGN1(m[i - 2]) + m[i - 7] + SIGN0(m[i - 15]) + m[i - 16];
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}
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auto a = m_state[0], b = m_state[1],
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c = m_state[2], d = m_state[3],
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e = m_state[4], f = m_state[5],
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g = m_state[6], h = m_state[7];
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for (size_t i = 0; i < Rounds; ++i) {
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auto temp0 = h + EP1(e) + CH(e, f, g) + SHA256Constants::RoundConstants[i] + m[i];
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auto temp1 = EP0(a) + MAJ(a, b, c);
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h = g;
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g = f;
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f = e;
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e = d + temp0;
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d = c;
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c = b;
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b = a;
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a = temp0 + temp1;
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}
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m_state[0] += a;
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m_state[1] += b;
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m_state[2] += c;
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m_state[3] += d;
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m_state[4] += e;
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m_state[5] += f;
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m_state[6] += g;
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m_state[7] += h;
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}
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void SHA256::update(const u8* message, size_t length)
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{
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for (size_t i = 0; i < length; ++i) {
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if (m_data_length == BlockSize) {
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transform(m_data_buffer);
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m_bit_length += 512;
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m_data_length = 0;
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}
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m_data_buffer[m_data_length++] = message[i];
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}
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}
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SHA256::DigestType SHA256::digest()
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{
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auto digest = peek();
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reset();
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return digest;
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}
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SHA256::DigestType SHA256::peek()
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{
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DigestType digest;
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size_t i = m_data_length;
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if (m_data_length < FinalBlockDataSize) {
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m_data_buffer[i++] = 0x80;
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while (i < FinalBlockDataSize)
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m_data_buffer[i++] = 0x00;
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} else {
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m_data_buffer[i++] = 0x80;
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while (i < BlockSize)
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m_data_buffer[i++] = 0x00;
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transform(m_data_buffer);
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__builtin_memset(m_data_buffer, 0, FinalBlockDataSize);
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}
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// append total message length
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m_bit_length += m_data_length * 8;
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m_data_buffer[BlockSize - 1] = m_bit_length;
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m_data_buffer[BlockSize - 2] = m_bit_length >> 8;
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m_data_buffer[BlockSize - 3] = m_bit_length >> 16;
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m_data_buffer[BlockSize - 4] = m_bit_length >> 24;
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m_data_buffer[BlockSize - 5] = m_bit_length >> 32;
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m_data_buffer[BlockSize - 6] = m_bit_length >> 40;
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m_data_buffer[BlockSize - 7] = m_bit_length >> 48;
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m_data_buffer[BlockSize - 8] = m_bit_length >> 56;
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transform(m_data_buffer);
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// SHA uses big-endian and we assume little-endian
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// FIXME: looks like a thing for AK::NetworkOrdered,
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// but he doesn't support shifting operations
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for (size_t i = 0; i < 4; ++i) {
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digest.data[i + 0] = (m_state[0] >> (24 - i * 8)) & 0x000000ff;
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digest.data[i + 4] = (m_state[1] >> (24 - i * 8)) & 0x000000ff;
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digest.data[i + 8] = (m_state[2] >> (24 - i * 8)) & 0x000000ff;
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digest.data[i + 12] = (m_state[3] >> (24 - i * 8)) & 0x000000ff;
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digest.data[i + 16] = (m_state[4] >> (24 - i * 8)) & 0x000000ff;
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digest.data[i + 20] = (m_state[5] >> (24 - i * 8)) & 0x000000ff;
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digest.data[i + 24] = (m_state[6] >> (24 - i * 8)) & 0x000000ff;
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digest.data[i + 28] = (m_state[7] >> (24 - i * 8)) & 0x000000ff;
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}
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return digest;
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}
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inline void SHA512::transform(const u8* data)
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{
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u64 m[80];
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size_t i = 0;
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for (size_t j = 0; i < 16; ++i, j += 8) {
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m[i] = ((u64)data[j] << 56) | ((u64)data[j + 1] << 48) | ((u64)data[j + 2] << 40) | ((u64)data[j + 3] << 32) | ((u64)data[j + 4] << 24) | ((u64)data[j + 5] << 16) | ((u64)data[j + 6] << 8) | (u64)data[j + 7];
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}
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for (; i < Rounds; ++i) {
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m[i] = SIGN1(m[i - 2]) + m[i - 7] + SIGN0(m[i - 15]) + m[i - 16];
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}
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auto a = m_state[0], b = m_state[1],
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c = m_state[2], d = m_state[3],
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e = m_state[4], f = m_state[5],
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g = m_state[6], h = m_state[7];
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for (size_t i = 0; i < Rounds; ++i) {
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auto temp0 = h + EP1(e) + CH(e, f, g) + SHA512Constants::RoundConstants[i] + m[i];
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auto temp1 = EP0(a) + MAJ(a, b, c);
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h = g;
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g = f;
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f = e;
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e = d + temp0;
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d = c;
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c = b;
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b = a;
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a = temp0 + temp1;
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}
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m_state[0] += a;
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m_state[1] += b;
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m_state[2] += c;
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m_state[3] += d;
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m_state[4] += e;
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m_state[5] += f;
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m_state[6] += g;
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m_state[7] += h;
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}
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void SHA512::update(const u8* message, size_t length)
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{
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for (size_t i = 0; i < length; ++i) {
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if (m_data_length == BlockSize) {
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transform(m_data_buffer);
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m_bit_length += 1024;
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m_data_length = 0;
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}
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m_data_buffer[m_data_length++] = message[i];
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}
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}
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SHA512::DigestType SHA512::digest()
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{
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auto digest = peek();
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reset();
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return digest;
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}
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SHA512::DigestType SHA512::peek()
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{
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DigestType digest;
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size_t i = m_data_length;
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if (m_data_length < FinalBlockDataSize) {
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m_data_buffer[i++] = 0x80;
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while (i < FinalBlockDataSize)
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m_data_buffer[i++] = 0x00;
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} else {
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m_data_buffer[i++] = 0x80;
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while (i < BlockSize)
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m_data_buffer[i++] = 0x00;
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transform(m_data_buffer);
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__builtin_memset(m_data_buffer, 0, FinalBlockDataSize);
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}
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// append total message length
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m_bit_length += m_data_length * 8;
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m_data_buffer[BlockSize - 1] = m_bit_length;
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m_data_buffer[BlockSize - 2] = m_bit_length >> 8;
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m_data_buffer[BlockSize - 3] = m_bit_length >> 16;
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m_data_buffer[BlockSize - 4] = m_bit_length >> 24;
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m_data_buffer[BlockSize - 5] = m_bit_length >> 32;
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m_data_buffer[BlockSize - 6] = m_bit_length >> 40;
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m_data_buffer[BlockSize - 7] = m_bit_length >> 48;
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m_data_buffer[BlockSize - 8] = m_bit_length >> 56;
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transform(m_data_buffer);
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// SHA uses big-endian and we assume little-endian
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// FIXME: looks like a thing for AK::NetworkOrdered,
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// but he doesn't support shifting operations
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for (size_t i = 0; i < 8; ++i) {
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digest.data[i + 0] = (m_state[0] >> (56 - i * 8)) & 0x000000ff;
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digest.data[i + 8] = (m_state[1] >> (56 - i * 8)) & 0x000000ff;
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digest.data[i + 16] = (m_state[2] >> (56 - i * 8)) & 0x000000ff;
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digest.data[i + 24] = (m_state[3] >> (56 - i * 8)) & 0x000000ff;
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digest.data[i + 32] = (m_state[4] >> (56 - i * 8)) & 0x000000ff;
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digest.data[i + 40] = (m_state[5] >> (56 - i * 8)) & 0x000000ff;
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digest.data[i + 48] = (m_state[6] >> (56 - i * 8)) & 0x000000ff;
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digest.data[i + 56] = (m_state[7] >> (56 - i * 8)) & 0x000000ff;
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}
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return digest;
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}
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}
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}
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