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Fix VERIFY calculations in _fe_cmov methods

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This commit is contained in:
Peter Dettman
2015-07-04 13:50:15 +09:30
parent 17f7148606
commit a0601cd79c
3 changed files with 22 additions and 8 deletions
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18
src/tests.c
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@@ -737,6 +737,15 @@ void run_field_convert(void) {
CHECK(memcmp(&fes2, &fes, sizeof(fes)) == 0);
}
int fe_memcmp(const secp256k1_fe_t *a, const secp256k1_fe_t *b) {
secp256k1_fe_t t = *b;
#ifdef VERIFY
t.magnitude = a->magnitude;
t.normalized = a->normalized;
#endif
return memcmp(a, &t, sizeof(secp256k1_fe_t));
}
void run_field_misc(void) {
secp256k1_fe_t x;
secp256k1_fe_t y;
@@ -757,12 +766,13 @@ void run_field_misc(void) {
q = x;
secp256k1_fe_cmov(&x, &z, 0);
secp256k1_fe_cmov(&x, &x, 1);
CHECK(memcmp(&x, &z, sizeof(x)) != 0);
CHECK(memcmp(&x, &q, sizeof(x)) == 0);
CHECK(fe_memcmp(&x, &z) != 0);
CHECK(fe_memcmp(&x, &q) == 0);
secp256k1_fe_cmov(&q, &z, 1);
CHECK(memcmp(&q, &z, sizeof(q)) == 0);
CHECK(fe_memcmp(&q, &z) == 0);
/* Test storage conversion and conditional moves. */
secp256k1_fe_normalize(&z);
secp256k1_fe_normalize_var(&x);
secp256k1_fe_normalize_var(&z);
CHECK(!secp256k1_fe_equal_var(&x, &z));
secp256k1_fe_to_storage(&xs, &x);
secp256k1_fe_to_storage(&ys, &y);