chromium/third_party/boringssl/src/crypto/spx/wots.c

/* Copyright (c) 2023, Google LLC
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */

#include <openssl/base.h>

#include <stdint.h>
#include <stdio.h>
#include <string.h>

#include "./address.h"
#include "./params.h"
#include "./spx_util.h"
#include "./thash.h"
#include "./wots.h"

// Chaining function used in WOTS+.
static void chain(uint8_t *output, const uint8_t *input, uint32_t start,
                  uint32_t steps, const uint8_t *pub_seed, uint8_t addr[32]) { … }

void spx_wots_pk_from_sig(uint8_t *pk, const uint8_t *sig, const uint8_t *msg,
                          const uint8_t pub_seed[SPX_N], uint8_t addr[32]) { … }

void spx_wots_pk_gen(uint8_t *pk, const uint8_t sk_seed[SPX_N],
                     const uint8_t pub_seed[SPX_N], uint8_t addr[32]) { … }

void spx_wots_sign(uint8_t *sig, const uint8_t msg[SPX_N],
                   const uint8_t sk_seed[SPX_N], const uint8_t pub_seed[SPX_N],
                   uint8_t addr[32]) { … }