frost/secp256k1-zkp
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Label variable-time functions correctly and don't use those in sign

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This commit is contained in:
Pieter Wuille
2014-11-04 02:34:11 -08:00
parent 784e62f3b2
commit da55986fdf
5 changed files with 56 additions and 41 deletions
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4
src/ecdsa_impl.h
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@@ -70,7 +70,7 @@ int static secp256k1_ecdsa_sig_recompute(secp256k1_num_t *r2, const secp256k1_ec
secp256k1_gej_t pubkeyj; secp256k1_gej_set_ge(&pubkeyj, pubkey);
secp256k1_gej_t pr; secp256k1_ecmult(&pr, &pubkeyj, &u2, &u1);
if (!secp256k1_gej_is_infinity(&pr)) {
secp256k1_fe_t xr; secp256k1_gej_get_x(&xr, &pr);
secp256k1_fe_t xr; secp256k1_gej_get_x_var(&xr, &pr);
secp256k1_fe_normalize(&xr);
unsigned char xrb[32]; secp256k1_fe_get_b32(xrb, &xr);
secp256k1_num_set_bin(r2, xrb, 32);
@@ -121,7 +121,7 @@ int static secp256k1_ecdsa_sig_recover(const secp256k1_ecdsa_sig_t *sig, secp256
secp256k1_num_mod_mul(&u2, &rn, &sig->s, &c->order);
secp256k1_gej_t qj;
secp256k1_ecmult(&qj, &xj, &u2, &u1);
secp256k1_ge_set_gej(pubkey, &qj);
secp256k1_ge_set_gej_var(pubkey, &qj);
secp256k1_num_free(&rn);
secp256k1_num_free(&u1);
secp256k1_num_free(&u2);