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/* $OpenBSD: mlkem_tests_util.c,v 1.3 2024/12/20 00:07:12 tb Exp $ */
/*
* Copyright (c) 2024 Google Inc.
* Copyright (c) 2024 Bob Beck <beck@obtuse.com>
* Copyright (c) 2024 Theo Buehler <tb@openbsd.org>
*
* 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 <err.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "bytestring.h"
#include "mlkem.h"
#include "mlkem_internal.h"
#include "mlkem_tests_util.h"
int failure;
int test_number;
static void
hexdump(const uint8_t *buf, size_t len, const uint8_t *compare)
{
const char *mark = "";
size_t i;
for (i = 1; i <= len; i++) {
if (compare != NULL)
mark = (buf[i - 1] != compare[i - 1]) ? "*" : " ";
fprintf(stderr, " %s0x%02hhx,%s", mark, buf[i - 1],
i % 8 && i != len ? "" : "\n");
}
fprintf(stderr, "\n");
}
int
compare_data(const uint8_t *want, const uint8_t *got, size_t len, size_t line,
const char *msg)
{
if (memcmp(want, got, len) == 0)
return 0;
warnx("FAIL: #%zu - %s differs", line, msg);
fprintf(stderr, "want:\n");
hexdump(want, len, got);
fprintf(stderr, "got:\n");
hexdump(got, len, want);
fprintf(stderr, "\n");
return 1;
}
int
compare_length(size_t want, size_t got, size_t line, const char *msg)
{
if (want == got)
return 1;
warnx("#%zu: %s: want %zu, got %zu", line, msg, want, got);
return 0;
}
static int
hex_get_nibble_cbs(CBS *cbs, uint8_t *out_nibble)
{
uint8_t c;
if (!CBS_get_u8(cbs, &c))
return 0;
if (c >= '0' && c <= '9') {
*out_nibble = c - '0';
return 1;
}
if (c >= 'a' && c <= 'f') {
*out_nibble = c - 'a' + 10;
return 1;
}
if (c >= 'A' && c <= 'F') {
*out_nibble = c - 'A' + 10;
return 1;
}
return 0;
}
void
hex_decode_cbs(CBS *cbs, CBB *cbb, size_t line, const char *msg)
{
if (!CBB_init(cbb, 0))
errx(1, "#%zu %s: %s CBB_init", line, msg, __func__);
while (CBS_len(cbs) > 0) {
uint8_t hi, lo;
if (!hex_get_nibble_cbs(cbs, &hi))
errx(1, "#%zu %s: %s nibble", line, msg, __func__);
if (!hex_get_nibble_cbs(cbs, &lo))
errx(1, "#%zu %s: %s nibble", line, msg, __func__);
if (!CBB_add_u8(cbb, hi << 4 | lo))
errx(1, "#%zu %s: %s CBB_add_u8", line, msg, __func__);
}
}
int
get_string_cbs(CBS *cbs_in, const char *str, size_t line, const char *msg)
{
CBS cbs;
size_t len = strlen(str);
if (!CBS_get_bytes(cbs_in, &cbs, len))
errx(1, "#%zu %s: %s CBB_get_bytes", line, msg, __func__);
return CBS_mem_equal(&cbs, str, len);
}
int
mlkem768_encode_private_key(const struct MLKEM768_private_key *priv,
uint8_t **out_buf, size_t *out_len)
{
CBB cbb;
int ret = 0;
if (!CBB_init(&cbb, MLKEM768_PUBLIC_KEY_BYTES))
goto err;
if (!MLKEM768_marshal_private_key(&cbb, priv))
goto err;
if (!CBB_finish(&cbb, out_buf, out_len))
goto err;
ret = 1;
err:
CBB_cleanup(&cbb);
return ret;
}
int
mlkem768_encode_public_key(const struct MLKEM768_public_key *pub,
uint8_t **out_buf, size_t *out_len)
{
CBB cbb;
int ret = 0;
if (!CBB_init(&cbb, MLKEM768_PUBLIC_KEY_BYTES))
goto err;
if (!MLKEM768_marshal_public_key(&cbb, pub))
goto err;
if (!CBB_finish(&cbb, out_buf, out_len))
goto err;
ret = 1;
err:
CBB_cleanup(&cbb);
return ret;
}
int
mlkem1024_encode_private_key(const struct MLKEM1024_private_key *priv,
uint8_t **out_buf, size_t *out_len)
{
CBB cbb;
int ret = 0;
if (!CBB_init(&cbb, MLKEM1024_PUBLIC_KEY_BYTES))
goto err;
if (!MLKEM1024_marshal_private_key(&cbb, priv))
goto err;
if (!CBB_finish(&cbb, out_buf, out_len))
goto err;
ret = 1;
err:
CBB_cleanup(&cbb);
return ret;
}
int
mlkem1024_encode_public_key(const struct MLKEM1024_public_key *pub,
uint8_t **out_buf, size_t *out_len)
{
CBB cbb;
int ret = 0;
if (!CBB_init(&cbb, MLKEM1024_PUBLIC_KEY_BYTES))
goto err;
if (!MLKEM1024_marshal_public_key(&cbb, pub))
goto err;
if (!CBB_finish(&cbb, out_buf, out_len))
goto err;
ret = 1;
err:
CBB_cleanup(&cbb);
return ret;
}
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