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util: add constant-time is_zero_array function

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This commit is contained in:
Jonas Nick
2024-09-25 16:03:14 +00:00
parent c8fbdb1b97
commit 0be79660f3
2 changed files with 29 additions and 0 deletions
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13
src/tests.c
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@@ -7467,6 +7467,18 @@ static void run_secp256k1_memczero_test(void) {
CHECK(secp256k1_memcmp_var(buf1, buf2, sizeof(buf1)) == 0);
}
static void run_secp256k1_is_zero_array_test(void) {
unsigned char buf1[3] = {0, 1};
unsigned char buf2[3] = {1, 0};
CHECK(secp256k1_is_zero_array(buf1, 0) == 1);
CHECK(secp256k1_is_zero_array(buf1, 1) == 1);
CHECK(secp256k1_is_zero_array(buf1, 2) == 0);
CHECK(secp256k1_is_zero_array(buf2, 1) == 0);
CHECK(secp256k1_is_zero_array(buf2, 2) == 0);
}
static void run_secp256k1_byteorder_tests(void) {
{
const uint32_t x = 0xFF03AB45;
@@ -7806,6 +7818,7 @@ int main(int argc, char **argv) {
/* util tests */
run_secp256k1_memczero_test();
run_secp256k1_is_zero_array_test();
run_secp256k1_byteorder_tests();
run_cmov_tests();