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/* $OpenBSD: mlkem768_decap_tests.c,v 1.2 2024/12/14 19:16:24 tb Exp $ */
/*
* Copyright (c) 2024, Google Inc.
* Copyright (c) 2024, Bob Beck <beck@obtuse.com>
*
* 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 <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/bytestring.h>
#include <openssl/mlkem.h>
#include "mlkem_tests_util.h"
static void
MlkemDecapFileTest(CBS *c, CBS *k, CBS *dk, int should_fail)
{
uint8_t shared_secret[MLKEM_SHARED_SECRET_BYTES];
struct MLKEM768_private_key priv;
int parse_ok, decap_ok;
parse_ok = MLKEM768_parse_private_key(&priv, dk);
if (!parse_ok) {
TEST(!should_fail, "parse_private_key");
return;
}
decap_ok = MLKEM768_decap(shared_secret, CBS_data(c), CBS_len(c),
&priv);
if (!decap_ok) {
TEST(!should_fail, "decap");
return;
}
TEST_DATAEQ(shared_secret, CBS_data(k),
MLKEM_SHARED_SECRET_BYTES, "shared_secret");
}
#define S_START 0
#define S_COMMENT 1
#define S_PRIVATE_KEY 2
#define S_CIPHERTEXT 3
#define S_RESULT 4
#define S_SHARED_SECRET 5
int
main(int argc, char **argv)
{
CBS ciphertext, shared_secret, private_key;
const uint8_t *p = NULL;
int should_fail = 0;
char *buf;
FILE *fp;
int state;
fprintf(stderr, "Testing decap test vectors in %s\n", argv[1]);
TEST((fp = fopen(argv[1], "r")) == NULL, "can't open test file");
MALLOC(buf, 16*1024);
state = S_COMMENT;
test_number = 1;
while (fgets(buf, 16*1024, fp) != NULL) {
switch (state) {
case S_START:
if (strcmp(buf, "\n") != 0)
break;
state = S_COMMENT;
break;
case S_COMMENT:
if (strncmp(buf, "#", 1) != 0)
break;
state = S_PRIVATE_KEY;
break;
case S_PRIVATE_KEY:
if (strncmp(buf, "private_key: ",
strlen("private_key: ")) != 0)
break;
grab_data(&private_key, buf, strlen("private_key: "));
p = CBS_data(&private_key);
state = S_CIPHERTEXT;
break;
case S_CIPHERTEXT:
if (strncmp(buf, "ciphertext: ",
strlen("ciphertext: ")) != 0)
break;
grab_data(&ciphertext, buf, strlen("ciphertext: "));
state = S_RESULT;
break;
case S_RESULT:
if (strncmp(buf, "result: pass",
strlen("result: pass")) != 0)
should_fail = 1;
else
should_fail = 0;
state = S_SHARED_SECRET;
break;
case S_SHARED_SECRET:
if (strncmp(buf, "shared_secret: ",
strlen("shared_secret: ")) != 0)
break;
grab_data(&shared_secret, buf,
strlen("shared_secret: "));
MlkemDecapFileTest(&ciphertext, &shared_secret,
&private_key, should_fail);
free((void *)CBS_data(&ciphertext));
free((void *)CBS_data(&shared_secret));
free((void *)p);
test_number++;
state = S_START;
break;
}
}
free(buf);
exit(failure);
}
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