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/* $OpenBSD: sm2crypttest.c,v 1.2 2022/11/26 16:08:56 tb Exp $ */
/*
* Copyright (c) 2017, 2019 Ribose Inc
*
* 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/bio.h>
#include <openssl/evp.h>
#include <openssl/bn.h>
#include <openssl/crypto.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#ifdef OPENSSL_NO_SM2
int main(int argc, char *argv[])
{
printf("No SM2 support\n");
return (0);
}
#else
#include <openssl/sm2.h>
#include "sm2_local.h"
static EC_GROUP *
create_EC_group(const char *p_hex, const char *a_hex, const char *b_hex,
const char *x_hex, const char *y_hex, const char *order_hex,
const char *cof_hex)
{
BIGNUM *p = NULL;
BIGNUM *a = NULL;
BIGNUM *b = NULL;
BIGNUM *g_x = NULL;
BIGNUM *g_y = NULL;
BIGNUM *order = NULL;
BIGNUM *cof = NULL;
EC_POINT *generator = NULL;
EC_GROUP *group = NULL;
BN_hex2bn(&p, p_hex);
BN_hex2bn(&a, a_hex);
BN_hex2bn(&b, b_hex);
group = EC_GROUP_new_curve_GFp(p, a, b, NULL);
BN_free(p);
BN_free(a);
BN_free(b);
if (group == NULL)
return NULL;
generator = EC_POINT_new(group);
if (generator == NULL)
return NULL;
BN_hex2bn(&g_x, x_hex);
BN_hex2bn(&g_y, y_hex);
if (EC_POINT_set_affine_coordinates(group, generator, g_x, g_y,
NULL) == 0)
return NULL;
BN_free(g_x);
BN_free(g_y);
BN_hex2bn(&order, order_hex);
BN_hex2bn(&cof, cof_hex);
if (EC_GROUP_set_generator(group, generator, order, cof) == 0)
return NULL;
EC_POINT_free(generator);
BN_free(order);
BN_free(cof);
return group;
}
static int
test_sm2(const EC_GROUP *group, const EVP_MD *digest, const char *privkey_hex,
const char *message)
{
const size_t msg_len = strlen(message);
BIGNUM *priv = NULL;
EC_KEY *key = NULL;
EC_POINT *pt = NULL;
size_t ctext_len = 0;
uint8_t *ctext = NULL;
uint8_t *recovered = NULL;
size_t recovered_len = msg_len;
int rc = 0;
BN_hex2bn(&priv, privkey_hex);
key = EC_KEY_new();
EC_KEY_set_group(key, group);
EC_KEY_set_private_key(key, priv);
pt = EC_POINT_new(group);
EC_POINT_mul(group, pt, priv, NULL, NULL, NULL);
EC_KEY_set_public_key(key, pt);
BN_free(priv);
EC_POINT_free(pt);
if (!SM2_ciphertext_size(key, digest, msg_len, &ctext_len))
goto done;
ctext = calloc(1, ctext_len);
if (ctext == NULL)
goto done;
rc = SM2_encrypt(key, digest, (const uint8_t *)message, msg_len, ctext, &ctext_len);
if (rc == 0)
goto done;
recovered = calloc(1, msg_len);
if (recovered == NULL)
goto done;
rc = SM2_decrypt(key, digest, ctext, ctext_len, recovered, &recovered_len);
if (rc == 0)
goto done;
if (recovered_len != msg_len)
goto done;
if (memcmp(recovered, message, msg_len) != 0)
goto done;
rc = 1;
done:
free(ctext);
free(recovered);
EC_KEY_free(key);
return rc;
}
int
main(int argc, char **argv)
{
int rc;
EC_GROUP *test_group =
create_EC_group
("8542D69E4C044F18E8B92435BF6FF7DE457283915C45517D722EDB8B08F1DFC3",
"787968B4FA32C3FD2417842E73BBFEFF2F3C848B6831D7E0EC65228B3937E498",
"63E4C6D3B23B0C849CF84241484BFE48F61D59A5B16BA06E6E12D1DA27C5249A",
"421DEBD61B62EAB6746434EBC3CC315E32220B3BADD50BDC4C4E6C147FEDD43D",
"0680512BCBB42C07D47349D2153B70C4E5D7FDFCBFA36EA1A85841B9E46E09A2",
"8542D69E4C044F18E8B92435BF6FF7DD297720630485628D5AE74EE7C32E79B7",
"1");
if (test_group == NULL)
return 1;
rc = test_sm2(test_group, EVP_sm3(),
"1649AB77A00637BD5E2EFE283FBF353534AA7F7CB89463F208DDBC2920BB0DA0",
"encryption standard");
if (rc == 0)
return 1;
/* Same test as above except using SHA-256 instead of SM3 */
rc = test_sm2(test_group, EVP_sha256(),
"1649AB77A00637BD5E2EFE283FBF353534AA7F7CB89463F208DDBC2920BB0DA0",
"encryption standard");
if (rc == 0)
return 1;
EC_GROUP_free(test_group);
printf("SUCCESS\n");
return 0;
}
#endif
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