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field: Static-assert that int args affecting magnitude are constant

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See #1001.
This commit is contained in:
Tim Ruffing
2023-06-13 13:34:49 +02:00
parent 67214f5f7d
commit be8ff3a02a
6 changed files with 43 additions and 18 deletions
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4
src/tests.c
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@@ -108,7 +108,7 @@ static void random_field_element_magnitude(secp256k1_fe *fe) {
}
secp256k1_fe_clear(&zero);
secp256k1_fe_negate(&zero, &zero, 0);
secp256k1_fe_mul_int(&zero, n - 1);
secp256k1_fe_mul_int_unchecked(&zero, n - 1);
secp256k1_fe_add(fe, &zero);
#ifdef VERIFY
CHECK(fe->magnitude == n);
@@ -3223,7 +3223,7 @@ static void run_field_misc(void) {
CHECK(q.normalized && q.magnitude == 1);
#endif
for (j = 0; j < 6; j++) {
secp256k1_fe_negate(&z, &z, j+1);
secp256k1_fe_negate_unchecked(&z, &z, j+1);
secp256k1_fe_normalize_var(&q);
secp256k1_fe_cmov(&q, &z, (j&1));
#ifdef VERIFY