203 lines
6.6 KiB
C
203 lines
6.6 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Based on BLAKE3 v1.3.1, https://github.com/BLAKE3-team/BLAKE3
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* Copyright (c) 2019-2020 Samuel Neves and Jack O'Connor
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* Copyright (c) 2021-2022 Tino Reichardt <milky-zfs@mcmilk.de>
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*/
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#include <sys/zfs_context.h>
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#include "blake3_impl.h"
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#define rotr32(x, n) (((x) >> (n)) | ((x) << (32 - (n))))
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static inline void g(uint32_t *state, size_t a, size_t b, size_t c, size_t d,
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uint32_t x, uint32_t y)
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{
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state[a] = state[a] + state[b] + x;
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state[d] = rotr32(state[d] ^ state[a], 16);
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state[c] = state[c] + state[d];
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state[b] = rotr32(state[b] ^ state[c], 12);
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state[a] = state[a] + state[b] + y;
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state[d] = rotr32(state[d] ^ state[a], 8);
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state[c] = state[c] + state[d];
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state[b] = rotr32(state[b] ^ state[c], 7);
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}
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static inline void round_fn(uint32_t state[16], const uint32_t *msg,
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size_t round)
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{
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/* Select the message schedule based on the round. */
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const uint8_t *schedule = BLAKE3_MSG_SCHEDULE[round];
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/* Mix the columns. */
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g(state, 0, 4, 8, 12, msg[schedule[0]], msg[schedule[1]]);
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g(state, 1, 5, 9, 13, msg[schedule[2]], msg[schedule[3]]);
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g(state, 2, 6, 10, 14, msg[schedule[4]], msg[schedule[5]]);
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g(state, 3, 7, 11, 15, msg[schedule[6]], msg[schedule[7]]);
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/* Mix the rows. */
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g(state, 0, 5, 10, 15, msg[schedule[8]], msg[schedule[9]]);
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g(state, 1, 6, 11, 12, msg[schedule[10]], msg[schedule[11]]);
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g(state, 2, 7, 8, 13, msg[schedule[12]], msg[schedule[13]]);
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g(state, 3, 4, 9, 14, msg[schedule[14]], msg[schedule[15]]);
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}
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static inline void compress_pre(uint32_t state[16], const uint32_t cv[8],
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const uint8_t block[BLAKE3_BLOCK_LEN], uint8_t block_len,
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uint64_t counter, uint8_t flags)
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{
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uint32_t block_words[16];
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block_words[0] = load32(block + 4 * 0);
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block_words[1] = load32(block + 4 * 1);
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block_words[2] = load32(block + 4 * 2);
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block_words[3] = load32(block + 4 * 3);
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block_words[4] = load32(block + 4 * 4);
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block_words[5] = load32(block + 4 * 5);
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block_words[6] = load32(block + 4 * 6);
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block_words[7] = load32(block + 4 * 7);
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block_words[8] = load32(block + 4 * 8);
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block_words[9] = load32(block + 4 * 9);
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block_words[10] = load32(block + 4 * 10);
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block_words[11] = load32(block + 4 * 11);
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block_words[12] = load32(block + 4 * 12);
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block_words[13] = load32(block + 4 * 13);
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block_words[14] = load32(block + 4 * 14);
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block_words[15] = load32(block + 4 * 15);
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state[0] = cv[0];
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state[1] = cv[1];
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state[2] = cv[2];
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state[3] = cv[3];
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state[4] = cv[4];
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state[5] = cv[5];
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state[6] = cv[6];
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state[7] = cv[7];
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state[8] = BLAKE3_IV[0];
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state[9] = BLAKE3_IV[1];
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state[10] = BLAKE3_IV[2];
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state[11] = BLAKE3_IV[3];
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state[12] = counter_low(counter);
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state[13] = counter_high(counter);
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state[14] = (uint32_t)block_len;
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state[15] = (uint32_t)flags;
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round_fn(state, &block_words[0], 0);
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round_fn(state, &block_words[0], 1);
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round_fn(state, &block_words[0], 2);
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round_fn(state, &block_words[0], 3);
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round_fn(state, &block_words[0], 4);
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round_fn(state, &block_words[0], 5);
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round_fn(state, &block_words[0], 6);
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}
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static inline void blake3_compress_in_place_generic(uint32_t cv[8],
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const uint8_t block[BLAKE3_BLOCK_LEN], uint8_t block_len,
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uint64_t counter, uint8_t flags)
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{
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uint32_t state[16];
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compress_pre(state, cv, block, block_len, counter, flags);
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cv[0] = state[0] ^ state[8];
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cv[1] = state[1] ^ state[9];
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cv[2] = state[2] ^ state[10];
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cv[3] = state[3] ^ state[11];
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cv[4] = state[4] ^ state[12];
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cv[5] = state[5] ^ state[13];
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cv[6] = state[6] ^ state[14];
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cv[7] = state[7] ^ state[15];
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}
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static inline void hash_one_generic(const uint8_t *input, size_t blocks,
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const uint32_t key[8], uint64_t counter, uint8_t flags,
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uint8_t flags_start, uint8_t flags_end, uint8_t out[BLAKE3_OUT_LEN])
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{
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uint32_t cv[8];
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memcpy(cv, key, BLAKE3_KEY_LEN);
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uint8_t block_flags = flags | flags_start;
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while (blocks > 0) {
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if (blocks == 1) {
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block_flags |= flags_end;
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}
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blake3_compress_in_place_generic(cv, input, BLAKE3_BLOCK_LEN,
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counter, block_flags);
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input = &input[BLAKE3_BLOCK_LEN];
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blocks -= 1;
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block_flags = flags;
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}
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store_cv_words(out, cv);
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}
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static inline void blake3_compress_xof_generic(const uint32_t cv[8],
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const uint8_t block[BLAKE3_BLOCK_LEN], uint8_t block_len,
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uint64_t counter, uint8_t flags, uint8_t out[64])
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{
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uint32_t state[16];
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compress_pre(state, cv, block, block_len, counter, flags);
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store32(&out[0 * 4], state[0] ^ state[8]);
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store32(&out[1 * 4], state[1] ^ state[9]);
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store32(&out[2 * 4], state[2] ^ state[10]);
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store32(&out[3 * 4], state[3] ^ state[11]);
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store32(&out[4 * 4], state[4] ^ state[12]);
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store32(&out[5 * 4], state[5] ^ state[13]);
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store32(&out[6 * 4], state[6] ^ state[14]);
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store32(&out[7 * 4], state[7] ^ state[15]);
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store32(&out[8 * 4], state[8] ^ cv[0]);
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store32(&out[9 * 4], state[9] ^ cv[1]);
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store32(&out[10 * 4], state[10] ^ cv[2]);
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store32(&out[11 * 4], state[11] ^ cv[3]);
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store32(&out[12 * 4], state[12] ^ cv[4]);
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store32(&out[13 * 4], state[13] ^ cv[5]);
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store32(&out[14 * 4], state[14] ^ cv[6]);
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store32(&out[15 * 4], state[15] ^ cv[7]);
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}
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static inline void blake3_hash_many_generic(const uint8_t * const *inputs,
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size_t num_inputs, size_t blocks, const uint32_t key[8], uint64_t counter,
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boolean_t increment_counter, uint8_t flags, uint8_t flags_start,
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uint8_t flags_end, uint8_t *out)
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{
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while (num_inputs > 0) {
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hash_one_generic(inputs[0], blocks, key, counter, flags,
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flags_start, flags_end, out);
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if (increment_counter) {
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counter += 1;
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}
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inputs += 1;
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num_inputs -= 1;
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out = &out[BLAKE3_OUT_LEN];
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}
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}
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static inline boolean_t blake3_is_generic_supported(void)
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{
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return (B_TRUE);
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}
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const blake3_impl_ops_t blake3_generic_impl = {
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.compress_in_place = blake3_compress_in_place_generic,
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.compress_xof = blake3_compress_xof_generic,
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.hash_many = blake3_hash_many_generic,
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.is_supported = blake3_is_generic_supported,
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.degree = 4,
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.name = "generic"
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};
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