frost/secp256k1-zkp
3
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Avoid normalize conditional on VERIFY

Browse Source
This commit is contained in:
Pieter Wuille 2023-05-09 13:52:16 -04:00
parent 341cc19726
commit 97c63b9039
2 changed files with 3 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
src/ecmult_impl.h
View File

@ -279,9 +279,6 @@ static void secp256k1_ecmult_strauss_wnaf(const struct secp256k1_strauss_state *
*/
tmp = a[np];
if (no) {
#ifdef VERIFY
secp256k1_fe_normalize_var(&Z);
#endif
secp256k1_gej_rescale(&tmp, &Z);
}
secp256k1_ecmult_odd_multiples_table(ECMULT_TABLE_SIZE(WINDOW_A), state->pre_a + no * ECMULT_TABLE_SIZE(WINDOW_A), state->aux + no * ECMULT_TABLE_SIZE(WINDOW_A), &Z, &tmp);

4
src/group_impl.h
View File

@ -748,7 +748,9 @@ static void secp256k1_gej_rescale(secp256k1_gej *r, const secp256k1_fe *s) {
secp256k1_fe zz;
secp256k1_gej_verify(r);
secp256k1_fe_verify(s);
VERIFY_CHECK(!secp256k1_fe_is_zero(s));
#ifdef VERIFY
VERIFY_CHECK(!secp256k1_fe_normalizes_to_zero_var(s));
#endif
secp256k1_fe_sqr(&zz, s);
secp256k1_fe_mul(&r->x, &r->x, &zz); /* r->x *= s^2 */
secp256k1_fe_mul(&r->y, &r->y, &zz);