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/* $OpenBSD: mlkem_unittest.c,v 1.3 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_internal.h"
#include "mlkem_tests_util.h"
static int
encode_public_key(const struct MLKEM768_public_key *pub, uint8_t **out_buf,
size_t *out_len)
{
CBB cbb;
if (!CBB_init(&cbb, MLKEM768_PUBLIC_KEY_BYTES))
return 0;
if (!MLKEM768_marshal_public_key(&cbb, pub))
return 0;
if (!CBB_finish(&cbb, out_buf, out_len))
return 0;
CBB_cleanup(&cbb);
return 1;
}
static int
encode_private_key(const struct MLKEM768_private_key *priv, uint8_t **out_buf,
size_t *out_len)
{
CBB cbb;
if (!CBB_init(&cbb, MLKEM768_PUBLIC_KEY_BYTES))
return 0;
if (!MLKEM768_marshal_private_key(&cbb, priv))
return 0;
if (!CBB_finish(&cbb, out_buf, out_len))
return 0;
CBB_cleanup(&cbb);
return 1;
}
static void
MlKem768UnitTest()
{
struct MLKEM768_private_key *priv, *priv2;
struct MLKEM768_public_key *pub, *pub2;
uint8_t encoded_public_key[MLKEM768_PUBLIC_KEY_BYTES];
uint8_t ciphertext[MLKEM768_CIPHERTEXT_BYTES];
uint8_t shared_secret1[MLKEM_SHARED_SECRET_BYTES];
uint8_t shared_secret2[MLKEM_SHARED_SECRET_BYTES];
uint8_t first_two_bytes[2];
uint8_t *encoded_private_key = NULL, *tmp_buf = NULL;
size_t encoded_private_key_len, tmp_buf_len;
CBS cbs;
fprintf(stderr, "ML-KEM 768...\n");
MALLOC(priv, sizeof(struct MLKEM768_private_key));
MLKEM768_generate_key(encoded_public_key, NULL, priv);
memcpy(first_two_bytes, encoded_public_key, sizeof(first_two_bytes));
memset(encoded_public_key, 0xff, sizeof(first_two_bytes));
CBS_init(&cbs, encoded_public_key,
sizeof(encoded_public_key));
MALLOC(pub, sizeof(struct MLKEM768_public_key));
/* Parsing should fail because the first coefficient is >= kPrime; */
TEST(MLKEM768_parse_public_key(pub, &cbs),
"Kyber_parse_public_key should have failed");
memcpy(encoded_public_key, first_two_bytes, sizeof(first_two_bytes));
CBS_init(&cbs, encoded_public_key, sizeof(encoded_public_key));
TEST(!MLKEM768_parse_public_key(pub, &cbs),
"MLKEM768_parse_public_key");
TEST(CBS_len(&cbs) != 0u, "CBS_len must be 0");
TEST(!encode_public_key(pub, &tmp_buf, &tmp_buf_len),
"encode_public_key");
TEST(sizeof(encoded_public_key) != tmp_buf_len,
"encoded public key lengths differ");
TEST_DATAEQ(tmp_buf, encoded_public_key, tmp_buf_len,
"encoded public keys");
free(tmp_buf);
tmp_buf = NULL;
MALLOC(pub2, sizeof(struct MLKEM768_public_key));
MLKEM768_public_from_private(pub2, priv);
TEST(!encode_public_key(pub2, &tmp_buf, &tmp_buf_len),
"encode_public_key");
TEST(sizeof(encoded_public_key) != tmp_buf_len,
"encoded public key lengths differ");
TEST_DATAEQ(tmp_buf, encoded_public_key, tmp_buf_len,
"encoded pubic keys");
free(tmp_buf);
tmp_buf = NULL;
TEST(!encode_private_key(priv, &encoded_private_key,
&encoded_private_key_len), "encode_private_key");
memcpy(first_two_bytes, encoded_private_key, sizeof(first_two_bytes));
memset(encoded_private_key, 0xff, sizeof(first_two_bytes));
CBS_init(&cbs, encoded_private_key, encoded_private_key_len);
MALLOC(priv2, sizeof(struct MLKEM768_private_key));
/* Parsing should fail because the first coefficient is >= kPrime. */
TEST(MLKEM768_parse_private_key(priv2, &cbs), "Should not have parsed");
memcpy(encoded_private_key, first_two_bytes, sizeof(first_two_bytes));
CBS_init(&cbs, encoded_private_key, encoded_private_key_len);
TEST(!MLKEM768_parse_private_key(priv2, &cbs),
"MLKEM768_parse_private_key");
TEST(!encode_private_key(priv2, &tmp_buf, &tmp_buf_len),
"encode_private_key");
TEST(encoded_private_key_len != tmp_buf_len,
"encoded private key lengths differ");
TEST_DATAEQ(tmp_buf, encoded_private_key, encoded_private_key_len,
"encoded private keys");
free(tmp_buf);
tmp_buf = NULL;
MLKEM768_encap(ciphertext, shared_secret1, pub);
MLKEM768_decap(shared_secret2, ciphertext, MLKEM768_CIPHERTEXT_BYTES,
priv);
TEST_DATAEQ(shared_secret1, shared_secret2, MLKEM_SHARED_SECRET_BYTES,
"shared secrets with priv");
MLKEM768_decap(shared_secret2, ciphertext, MLKEM768_CIPHERTEXT_BYTES,
priv2);
TEST_DATAEQ(shared_secret1, shared_secret2, MLKEM_SHARED_SECRET_BYTES,
"shared secrets with priv2");
free(encoded_private_key);
free(pub);
free(pub2);
free(priv);
free(priv2);
}
static int
encode_1024public_key(const struct MLKEM1024_public_key *pub, uint8_t **out_buf,
size_t *out_len)
{
CBB cbb;
if (!CBB_init(&cbb, MLKEM1024_PUBLIC_KEY_BYTES))
return 0;
if (!MLKEM1024_marshal_public_key(&cbb, pub))
return 0;
if (!CBB_finish(&cbb, out_buf, out_len))
return 0;
CBB_cleanup(&cbb);
return 1;
}
static int
encode_1024private_key(const struct MLKEM1024_private_key *priv, uint8_t **out_buf,
size_t *out_len)
{
CBB cbb;
if (!CBB_init(&cbb, MLKEM1024_PUBLIC_KEY_BYTES))
return 0;
if (!MLKEM1024_marshal_private_key(&cbb, priv))
return 0;
if (!CBB_finish(&cbb, out_buf, out_len))
return 0;
CBB_cleanup(&cbb);
return 1;
}
static void
MlKem1024UnitTest()
{
struct MLKEM1024_private_key *priv, *priv2;
struct MLKEM1024_public_key *pub, *pub2;
uint8_t encoded_public_key[MLKEM1024_PUBLIC_KEY_BYTES];
uint8_t ciphertext[MLKEM1024_CIPHERTEXT_BYTES];
uint8_t shared_secret1[MLKEM_SHARED_SECRET_BYTES];
uint8_t shared_secret2[MLKEM_SHARED_SECRET_BYTES];
uint8_t first_two_bytes[2];
uint8_t *encoded_private_key = NULL, *tmp_buf = NULL;
size_t encoded_private_key_len, tmp_buf_len;
CBS cbs;
fprintf(stderr, "ML-KEM 1024...\n");
MALLOC(priv, sizeof(struct MLKEM1024_private_key));
MLKEM1024_generate_key(encoded_public_key, NULL, priv);
memcpy(first_two_bytes, encoded_public_key, sizeof(first_two_bytes));
memset(encoded_public_key, 0xff, sizeof(first_two_bytes));
CBS_init(&cbs, encoded_public_key,
sizeof(encoded_public_key));
MALLOC(pub, sizeof(struct MLKEM1024_public_key));
/* Parsing should fail because the first coefficient is >= kPrime; */
TEST(MLKEM1024_parse_public_key(pub, &cbs),
"Kyber_parse_public_key should have failed");
memcpy(encoded_public_key, first_two_bytes, sizeof(first_two_bytes));
CBS_init(&cbs, encoded_public_key, sizeof(encoded_public_key));
TEST(!MLKEM1024_parse_public_key(pub, &cbs),
"MLKEM1024_parse_public_key");
TEST(CBS_len(&cbs) != 0u, "CBS_len must be 0");
TEST(!encode_1024public_key(pub, &tmp_buf, &tmp_buf_len),
"encode_1024public_key");
TEST(sizeof(encoded_public_key) != tmp_buf_len,
"encoded public key lengths differ");
TEST_DATAEQ(tmp_buf, encoded_public_key, tmp_buf_len,
"encoded public keys");
free(tmp_buf);
tmp_buf = NULL;
MALLOC(pub2, sizeof(struct MLKEM1024_public_key));
MLKEM1024_public_from_private(pub2, priv);
TEST(!encode_1024public_key(pub2, &tmp_buf, &tmp_buf_len),
"encode_public_key");
TEST(sizeof(encoded_public_key) != tmp_buf_len,
"encoded public key lengths differ");
TEST_DATAEQ(tmp_buf, encoded_public_key, tmp_buf_len,
"encoded pubic keys");
free(tmp_buf);
tmp_buf = NULL;
TEST(!encode_1024private_key(priv, &encoded_private_key,
&encoded_private_key_len), "encode_1024private_key");
memcpy(first_two_bytes, encoded_private_key, sizeof(first_two_bytes));
memset(encoded_private_key, 0xff, sizeof(first_two_bytes));
CBS_init(&cbs, encoded_private_key, encoded_private_key_len);
MALLOC(priv2, sizeof(struct MLKEM1024_private_key));
/* Parsing should fail because the first coefficient is >= kPrime. */
TEST(MLKEM1024_parse_private_key(priv2, &cbs), "Should not have parsed");
memcpy(encoded_private_key, first_two_bytes, sizeof(first_two_bytes));
CBS_init(&cbs, encoded_private_key, encoded_private_key_len);
TEST(!MLKEM1024_parse_private_key(priv2, &cbs),
"MLKEM1024_parse_private_key");
TEST(!encode_1024private_key(priv2, &tmp_buf, &tmp_buf_len),
"encode_private_key");
TEST(encoded_private_key_len != tmp_buf_len,
"encoded private key lengths differ");
TEST_DATAEQ(tmp_buf, encoded_private_key, encoded_private_key_len,
"encoded private keys");
free(tmp_buf);
tmp_buf = NULL;
MLKEM1024_encap(ciphertext, shared_secret1, pub);
MLKEM1024_decap(shared_secret2, ciphertext, MLKEM1024_CIPHERTEXT_BYTES,
priv);
TEST_DATAEQ(shared_secret1, shared_secret2, MLKEM_SHARED_SECRET_BYTES,
"shared secrets with priv");
MLKEM1024_decap(shared_secret2, ciphertext, MLKEM1024_CIPHERTEXT_BYTES,
priv2);
TEST_DATAEQ(shared_secret1, shared_secret2, MLKEM_SHARED_SECRET_BYTES,
"shared secrets with priv2");
free(encoded_private_key);
free(pub);
free(pub2);
free(priv);
free(priv2);
}
int
main(int argc, char **argv)
{
MlKem768UnitTest();
MlKem1024UnitTest();
exit(failure);
}
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