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327 lines
16 KiB
C++
327 lines
16 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <vapours.hpp>
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#if defined(ATMOSPHERE_IS_STRATOSPHERE)
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#include <arm_neon.h>
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namespace ams::crypto::impl {
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namespace {
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alignas(Sha256Impl::BlockSize) constexpr const u32 RoundConstants[0x40] = {
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0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5,
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0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,
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0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,
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0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,
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0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC,
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0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
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0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7,
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0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,
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0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,
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0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,
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0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3,
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0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
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0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5,
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0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,
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0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
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0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2,
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};
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}
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void Sha256Impl::Initialize() {
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/* Reset buffered bytes/bits. */
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m_buffered_bytes = 0;
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m_bits_consumed = 0;
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/* Set intermediate hash. */
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m_intermediate_hash[0] = 0x6A09E667;
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m_intermediate_hash[1] = 0xBB67AE85;
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m_intermediate_hash[2] = 0x3C6EF372;
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m_intermediate_hash[3] = 0xA54FF53A;
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m_intermediate_hash[4] = 0x510E527F;
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m_intermediate_hash[5] = 0x9B05688C;
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m_intermediate_hash[6] = 0x1F83D9AB;
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m_intermediate_hash[7] = 0x5BE0CD19;
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/* Set state. */
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m_state = State_Initialized;
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}
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void Sha256Impl::Update(const void *data, size_t size) {
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/* Verify we're in a state to update. */
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AMS_ASSERT(m_state == State_Initialized);
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/* Advance our input bit count. */
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m_bits_consumed += BITSIZEOF(u8) * (((m_buffered_bytes + size) / BlockSize) * BlockSize);
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/* Process anything we have buffered. */
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const u8 *data8 = static_cast<const u8 *>(data);
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size_t remaining = size;
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if (m_buffered_bytes > 0) {
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const size_t copy_size = std::min(BlockSize - m_buffered_bytes, remaining);
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std::memcpy(m_buffer + m_buffered_bytes, data8, copy_size);
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data8 += copy_size;
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remaining -= copy_size;
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m_buffered_bytes += copy_size;
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/* Process a block, if we filled one. */
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if (m_buffered_bytes == BlockSize) {
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this->ProcessBlock(m_buffer);
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m_buffered_bytes = 0;
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}
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}
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/* Process blocks, if we have any. */
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if (remaining >= BlockSize) {
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const size_t blocks = remaining / BlockSize;
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this->ProcessBlocks(data8, blocks);
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data8 += BlockSize * blocks;
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remaining -= BlockSize * blocks;
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}
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/* Copy any leftover data to our buffer. */
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if (remaining > 0) {
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m_buffered_bytes = remaining;
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std::memcpy(m_buffer, data8, remaining);
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}
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}
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void Sha256Impl::GetHash(void *dst, size_t size) {
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/* Verify we're in a state to get hash. */
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AMS_ASSERT(m_state == State_Initialized || m_state == State_Done);
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AMS_ASSERT(size >= HashSize);
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AMS_UNUSED(size);
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/* If we need to, process the last block. */
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if (m_state == State_Initialized) {
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this->ProcessLastBlock();
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m_state = State_Done;
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}
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/* Copy the output hash. */
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if constexpr (util::IsLittleEndian()) {
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static_assert(HashSize % sizeof(u32) == 0);
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u32 *dst_32 = static_cast<u32 *>(dst);
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for (size_t i = 0; i < HashSize / sizeof(u32); ++i) {
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dst_32[i] = util::LoadBigEndian<u32>(m_intermediate_hash + i);
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}
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} else {
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std::memcpy(dst, m_intermediate_hash, HashSize);
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}
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}
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void Sha256Impl::InitializeWithContext(const Sha256Context *context) {
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/* Copy state in from the context. */
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std::memcpy(m_intermediate_hash, context->intermediate_hash, sizeof(m_intermediate_hash));
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m_bits_consumed = context->bits_consumed;
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/* Reset other fields. */
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m_buffered_bytes = 0;
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m_state = State_Initialized;
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}
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size_t Sha256Impl::GetContext(Sha256Context *context) const {
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/* Check our state. */
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AMS_ASSERT(m_state == State_Initialized);
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/* Copy out the context. */
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std::memcpy(context->intermediate_hash, m_intermediate_hash, sizeof(context->intermediate_hash));
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context->bits_consumed = m_bits_consumed;
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return m_buffered_bytes;
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}
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ALWAYS_INLINE void Sha256Impl::ProcessBlock(const void *data) {
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return this->ProcessBlocks(static_cast<const u8 *>(data), 1);
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}
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void Sha256Impl::ProcessBlocks(const u8 *data, size_t block_count) {
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/* Load previous hash with intermediate state, current hash with zeroes. */
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uint32x4_t prev_hash0 = vld1q_u32(m_intermediate_hash + 0);
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uint32x4_t prev_hash1 = vld1q_u32(m_intermediate_hash + 4);
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uint32x4_t cur_hash0 = vdupq_n_u32(0);
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uint32x4_t cur_hash1 = vdupq_n_u32(0);
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/* Process blocks. */
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do {
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uint32x4_t round_constant0, round_constant1;
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uint32x4_t data0, data1, data2, data3;
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uint32x4_t tmp0, tmp1, tmp2, tmp3;
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uint32x4_t tmp_hash;
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/* Use optimized ASM implementation to process the block. */
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__asm__ __volatile__ (
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"ldp %q[data0], %q[data1], [%[data]], #0x20\n"
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"ldp %q[data2], %q[data3], [%[data]], #0x20\n"
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"add %[cur_hash0].4s, %[cur_hash0].4s, %[prev_hash0].4s\n"
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"ldp %q[round_constant0], %q[round_constant1], [%[round_constants], 0x00]\n"
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"add %[cur_hash1].4s, %[cur_hash1].4s, %[prev_hash1].4s\n"
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"rev32 %[data0].16b, %[data0].16b\n"
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"rev32 %[data1].16b, %[data1].16b\n"
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"rev32 %[data2].16b, %[data2].16b\n"
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"rev32 %[data3].16b, %[data3].16b\n"
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"add %[tmp0].4s, %[data0].4s, %[round_constant0].4s\n"
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"add %[tmp1].4s, %[data1].4s, %[round_constant1].4s\n"
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"ldp %q[round_constant0], %q[round_constant1], [%[round_constants], 0x20]\n"
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"sha256su0 %[data0].4s, %[data1].4s\n"
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"mov %[prev_hash0].16b, %[cur_hash0].16b\n"
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"sha256h %q[cur_hash0], %q[cur_hash1], %[tmp0].4s\n"
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"mov %[prev_hash1].16b, %[cur_hash1].16b\n"
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"sha256h2 %q[cur_hash1], %q[prev_hash0], %[tmp0].4s\n"
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"sha256su0 %[data1].4s, %[data2].4s\n"
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"sha256su1 %[data0].4s, %[data2].4s, %[data3].4s\n"
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"add %[tmp2].4s, %[data2].4s, %[round_constant0].4s\n"
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"mov %[tmp_hash].16b, %[cur_hash0].16b\n"
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"sha256h %q[cur_hash0], %q[cur_hash1], %[tmp1].4s\n"
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"sha256h2 %q[cur_hash1], %q[tmp_hash], %[tmp1].4s\n"
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"sha256su0 %[data2].4s, %[data3].4s\n"
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"sha256su1 %[data1].4s, %[data3].4s, %[data0].4s\n"
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"add %[tmp3].4s, %[data3].4s, %[round_constant1].4s\n"
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"mov %[tmp_hash].16b, %[cur_hash0].16b\n"
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"ldp %q[round_constant0], %q[round_constant1], [%[round_constants], 0x40]\n"
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"sha256h %q[cur_hash0], %q[cur_hash1], %[tmp2].4s\n"
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"sha256h2 %q[cur_hash1], %q[tmp_hash], %[tmp2].4s\n"
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"sha256su0 %[data3].4s, %[data0].4s\n"
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"sha256su1 %[data2].4s, %[data0].4s, %[data1].4s\n"
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"add %[tmp0].4s, %[data0].4s, %[round_constant0].4s\n"
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"mov %[tmp_hash].16b, %[cur_hash0].16b\n"
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"sha256h %q[cur_hash0], %q[cur_hash1], %[tmp3].4s\n"
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"sha256h2 %q[cur_hash1], %q[tmp_hash], %[tmp3].4s\n"
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"sha256su0 %[data0].4s, %[data1].4s\n"
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"sha256su1 %[data3].4s, %[data1].4s, %[data2].4s\n"
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"add %[tmp1].4s, %[data1].4s, %[round_constant1].4s\n"
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"mov %[tmp_hash].16b, %[cur_hash0].16b\n"
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"ldp %q[round_constant0], %q[round_constant1], [%[round_constants], 0x60]\n"
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"sha256h %q[cur_hash0], %q[cur_hash1], %[tmp0].4s\n"
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"sha256h2 %q[cur_hash1], %q[tmp_hash], %[tmp0].4s\n"
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"sha256su0 %[data1].4s, %[data2].4s\n"
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"sha256su1 %[data0].4s, %[data2].4s, %[data3].4s\n"
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"add %[tmp2].4s, %[data2].4s, %[round_constant0].4s\n"
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"mov %[tmp_hash].16b, %[cur_hash0].16b\n"
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"sha256h %q[cur_hash0], %q[cur_hash1], %[tmp1].4s\n"
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"sha256h2 %q[cur_hash1], %q[tmp_hash], %[tmp1].4s\n"
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"sha256su0 %[data2].4s, %[data3].4s\n"
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"sha256su1 %[data1].4s, %[data3].4s, %[data0].4s\n"
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"add %[tmp3].4s, %[data3].4s, %[round_constant1].4s\n"
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"mov %[tmp_hash].16b, %[cur_hash0].16b\n"
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"ldp %q[round_constant0], %q[round_constant1], [%[round_constants], 0x80]\n"
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"sha256h %q[cur_hash0], %q[cur_hash1], %[tmp2].4s\n"
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"sha256h2 %q[cur_hash1], %q[tmp_hash], %[tmp2].4s\n"
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"sha256su0 %[data3].4s, %[data0].4s\n"
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"sha256su1 %[data2].4s, %[data0].4s, %[data1].4s\n"
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"add %[tmp0].4s, %[data0].4s, %[round_constant0].4s\n"
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"mov %[tmp_hash].16b, %[cur_hash0].16b\n"
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"sha256h %q[cur_hash0], %q[cur_hash1], %[tmp3].4s\n"
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"sha256h2 %q[cur_hash1], %q[tmp_hash], %[tmp3].4s\n"
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"sha256su0 %[data0].4s, %[data1].4s\n"
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"sha256su1 %[data3].4s, %[data1].4s, %[data2].4s\n"
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"add %[tmp1].4s, %[data1].4s, %[round_constant1].4s\n"
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"mov %[tmp_hash].16b, %[cur_hash0].16b\n"
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"ldp %q[round_constant0], %q[round_constant1], [%[round_constants], 0xA0]\n"
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"sha256h %q[cur_hash0], %q[cur_hash1], %[tmp0].4s\n"
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"sha256h2 %q[cur_hash1], %q[tmp_hash], %[tmp0].4s\n"
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"sha256su0 %[data1].4s, %[data2].4s\n"
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"sha256su1 %[data0].4s, %[data2].4s, %[data3].4s\n"
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"add %[tmp2].4s, %[data2].4s, %[round_constant0].4s\n"
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"mov %[tmp_hash].16b, %[cur_hash0].16b\n"
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"sha256h %q[cur_hash0], %q[cur_hash1], %[tmp1].4s\n"
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"sha256h2 %q[cur_hash1], %q[tmp_hash], %[tmp1].4s\n"
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"sha256su0 %[data2].4s, %[data3].4s\n"
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"sha256su1 %[data1].4s, %[data3].4s, %[data0].4s\n"
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"add %[tmp3].4s, %[data3].4s, %[round_constant1].4s\n"
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"mov %[tmp_hash].16b, %[cur_hash0].16b\n"
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"ldp %q[round_constant0], %q[round_constant1], [%[round_constants], 0xC0]\n"
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"sha256h %q[cur_hash0], %q[cur_hash1], %[tmp2].4s\n"
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"sha256h2 %q[cur_hash1], %q[tmp_hash], %[tmp2].4s\n"
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"sha256su0 %[data3].4s, %[data0].4s\n"
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"sha256su1 %[data2].4s, %[data0].4s, %[data1].4s\n"
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"add %[tmp0].4s, %[data0].4s, %[round_constant0].4s\n"
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"mov %[tmp_hash].16b, %[cur_hash0].16b\n"
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"sha256h %q[cur_hash0], %q[cur_hash1], %[tmp3].4s\n"
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"sha256h2 %q[cur_hash1], %q[tmp_hash], %[tmp3].4s\n"
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"sha256su1 %[data3].4s, %[data1].4s, %[data2].4s\n"
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"add %[tmp1].4s, %[data1].4s, %[round_constant1].4s\n"
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"mov %[tmp_hash].16b, %[cur_hash0].16b\n"
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"ldp %q[round_constant0], %q[round_constant1], [%[round_constants], 0xE0]\n"
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"sha256h %q[cur_hash0], %q[cur_hash1], %[tmp0].4s\n"
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"sha256h2 %q[cur_hash1], %q[tmp_hash], %[tmp0].4s\n"
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"add %[tmp2].4s, %[data2].4s, %[round_constant0].4s\n"
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"mov %[tmp_hash].16b, %[cur_hash0].16b\n"
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"sha256h %q[cur_hash0], %q[cur_hash1], %[tmp1].4s\n"
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"sha256h2 %q[cur_hash1], %q[tmp_hash], %[tmp1].4s\n"
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"add %[tmp3].4s, %[data3].4s, %[round_constant1].4s\n"
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"mov %[tmp_hash].16b, %[cur_hash0].16b\n"
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"sha256h %q[cur_hash0], %q[cur_hash1], %[tmp2].4s\n"
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"sha256h2 %q[cur_hash1], %q[tmp_hash], %[tmp2].4s\n"
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"mov %[tmp_hash].16b, %[cur_hash0].16b\n"
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"sha256h %q[cur_hash0], %q[cur_hash1], %[tmp3].4s\n"
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"sha256h2 %q[cur_hash1], %q[tmp_hash], %[tmp3].4s\n"
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: [data0]"=w"(data0), [data1]"=w"(data1), [data2]"=w"(data2), [data3]"=w"(data3),
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[tmp0]"=w"(tmp0), [tmp1]"=w"(tmp1), [tmp2]"=w"(tmp2), [tmp3]"=w"(tmp3),
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[round_constant0]"=w"(round_constant0), [round_constant1]"=w"(round_constant1),
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[cur_hash0]"+w"(cur_hash0), [cur_hash1]"+w"(cur_hash1),
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[prev_hash0]"+w"(prev_hash0), [prev_hash1]"+w"(prev_hash1),
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[tmp_hash]"=w"(tmp_hash), [data]"+r"(data)
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: [round_constants]"r"(RoundConstants)
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:
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);
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} while (--block_count != 0);
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/* Add hashes together, and store. */
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cur_hash0 = vaddq_u32(prev_hash0, cur_hash0);
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cur_hash1 = vaddq_u32(prev_hash1, cur_hash1);
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vst1q_u32(m_intermediate_hash + 0, cur_hash0);
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vst1q_u32(m_intermediate_hash + 4, cur_hash1);
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}
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void Sha256Impl::ProcessLastBlock() {
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/* Setup the final block. */
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constexpr const auto BlockSizeWithoutSizeField = BlockSize - sizeof(u64);
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/* Increment our bits consumed. */
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m_bits_consumed += BITSIZEOF(u8) * m_buffered_bytes;
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/* Add 0x80 terminator. */
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m_buffer[m_buffered_bytes++] = 0x80;
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/* If we can process the size field directly, do so, otherwise set up to process it. */
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if (m_buffered_bytes <= BlockSizeWithoutSizeField) {
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/* Clear up to size field. */
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std::memset(m_buffer + m_buffered_bytes, 0, BlockSizeWithoutSizeField - m_buffered_bytes);
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} else {
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/* Consume full block */
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std::memset(m_buffer + m_buffered_bytes, 0, BlockSize - m_buffered_bytes);
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this->ProcessBlock(m_buffer);
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/* Clear up to size field. */
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std::memset(m_buffer, 0, BlockSizeWithoutSizeField);
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}
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/* Store the size field. */
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util::StoreBigEndian<u64>(reinterpret_cast<u64 *>(m_buffer + BlockSizeWithoutSizeField), m_bits_consumed);
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/* Process the final block. */
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this->ProcessBlock(m_buffer);
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}
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}
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#endif |