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Abstract out verify logic for fe_is_square_var

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This commit is contained in:
Pieter Wuille
2023-05-11 03:16:00 -04:00
parent 4371f98346
commit 4e176ad5b9
4 changed files with 18 additions and 11 deletions
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6
src/field_5x52_impl.h
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@@ -504,7 +504,7 @@ static void secp256k1_fe_impl_inv_var(secp256k1_fe *r, const secp256k1_fe *x) {
secp256k1_fe_from_signed62(r, &s);
}
static int secp256k1_fe_is_square_var(const secp256k1_fe *x) {
static int secp256k1_fe_impl_is_square_var(const secp256k1_fe *x) {
secp256k1_fe tmp;
secp256k1_modinv64_signed62 s;
int jac, ret;
@@ -522,10 +522,6 @@ static int secp256k1_fe_is_square_var(const secp256k1_fe *x) {
secp256k1_fe dummy;
ret = secp256k1_fe_sqrt(&dummy, &tmp);
} else {
#ifdef VERIFY
secp256k1_fe dummy;
VERIFY_CHECK(jac == 2*secp256k1_fe_sqrt(&dummy, &tmp) - 1);
#endif
ret = jac >= 0;
}
return ret;