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[test] Make sm2_internal_test less fragile to changes in the ec module

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Since these are KATs, the trailing randomness consumed by the ec module
does not really matter. So make the fake random buffer circular.

Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/11435)
This commit is contained in:
Billy Brumley 2020-03-29 10:38:37 +03:00 committed by Nicola Tuveri
parent cd81ac7be3
commit 09736245b1
1 changed files with 9 additions and 10 deletions
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19
test/sm2_internal_test.c
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@ -37,17 +37,18 @@ static size_t fake_rand_size = 0;
static int get_faked_bytes(unsigned char *buf, int num)
{
int i;
if (fake_rand_bytes == NULL)
return saved_rand->bytes(buf, num);
if (!TEST_size_t_le(fake_rand_bytes_offset + num, fake_rand_size))
if (!TEST_size_t_gt(fake_rand_size, 0))
return 0;
for (i = 0; i != num; ++i)
buf[i] = fake_rand_bytes[fake_rand_bytes_offset + i];
fake_rand_bytes_offset += num;
while (num-- > 0) {
if (fake_rand_bytes_offset >= fake_rand_size)
fake_rand_bytes_offset = 0;
*buf++ = fake_rand_bytes[fake_rand_bytes_offset++];
}
return 1;
}
@ -180,8 +181,7 @@ static int test_sm2_crypt(const EC_GROUP *group,
start_fake_rand(k_hex);
if (!TEST_true(sm2_encrypt(key, digest, (const uint8_t *)message, msg_len,
ctext, &ctext_len))
|| !TEST_size_t_eq(fake_rand_bytes_offset, fake_rand_size)) {
ctext, &ctext_len))) {
restore_rand();
goto done;
}
@ -301,8 +301,7 @@ static int test_sm2_sign(const EC_GROUP *group,
start_fake_rand(k_hex);
sig = sm2_do_sign(key, EVP_sm3(), (const uint8_t *)userid, strlen(userid),
(const uint8_t *)message, msg_len);
if (!TEST_ptr(sig)
|| !TEST_size_t_eq(fake_rand_bytes_offset, fake_rand_size)) {
if (!TEST_ptr(sig)) {
restore_rand();
goto done;
}