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Use Montgomery's Trick on sm2_fast_sign_pre_compute

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This commit is contained in:
Zhi Guan
2024-04-22 17:43:05 +08:00
parent bdd2149dc8
commit e05fd9c1b9
3 changed files with 90 additions and 89 deletions
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55
tests/sm2_signtest.c
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@@ -106,6 +106,7 @@ static int test_sm2_fast_sign(void)
{
SM2_KEY sm2_key;
sm2_z256_t fast_private;
SM2_SIGN_PRE_COMP pre_comp[32];
uint8_t dgst[32];
SM2_SIGNATURE sig;
size_t i;
@@ -118,17 +119,15 @@ static int test_sm2_fast_sign(void)
error_print();
return -1;
}
if (sm2_fast_sign_pre_compute(pre_comp) != 1) {
error_print();
return -1;
}
rand_bytes(dgst, sizeof(dgst));
for (i = 0; i < TEST_COUNT; i++) {
sm2_z256_t k;
sm2_z256_t x1_modn;
for (i = 0; i < TEST_COUNT && i < sizeof(pre_comp)/sizeof(pre_comp[0]); i++) {
if (sm2_fast_sign_pre_compute(k, x1_modn) != 1) {
error_print();
return -1;
}
if (sm2_fast_sign(fast_private, k, x1_modn, dgst, &sig) != 1) {
if (sm2_fast_sign(fast_private, &pre_comp[i], dgst, &sig) != 1) {
error_print();
return -1;
}
@@ -143,45 +142,6 @@ static int test_sm2_fast_sign(void)
return 1;
}
static int test_sm2_do_sign_pre_compute(void)
{
SM2_KEY sm2_key;
uint64_t d[4];
uint64_t k[4];
uint64_t x1[4];
uint8_t dgst[32];
SM2_SIGNATURE sig;
sm2_key_generate(&sm2_key);
const uint64_t *one = sm2_z256_one();
sm2_z256_copy(d, sm2_key.private_key);
sm2_z256_modn_add(d, d, one);
sm2_z256_modn_inv(d, d);
if (sm2_fast_sign_pre_compute(k, x1) != 1) {
error_print();
return -1;
}
rand_bytes(dgst, sizeof(dgst));
if (sm2_fast_sign(d, k, x1, dgst, &sig) != 1) {
error_print();
return -1;
}
if (sm2_do_verify(&sm2_key, dgst, &sig) != 1) {
error_print();
return -1;
}
printf("%s() ok\n", __FUNCTION__);
return 1;
}
static int test_sm2_sign(void)
{
SM2_KEY sm2_key;
@@ -334,7 +294,6 @@ int main(void)
{
if (test_sm2_signature() != 1) goto err;
if (test_sm2_do_sign() != 1) goto err;
if (test_sm2_do_sign_pre_compute() != 1) goto err;
if (test_sm2_fast_sign() != 1) goto err;
if (test_sm2_sign() != 1) goto err;
if (test_sm2_sign_ctx() != 1) goto err;