frost/secp256k1-zkp
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Fixed UB(arithmetics on uninit values) in cmovs

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Elichai Turkel
2020-05-20 15:09:13 +03:00
parent 3a6fd7f636
commit a39c2b09de
5 changed files with 12 additions and 7 deletions
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4
src/field.h
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@@ -125,10 +125,10 @@ static void secp256k1_fe_to_storage(secp256k1_fe_storage *r, const secp256k1_fe
/** Convert a field element back from the storage type. */
static void secp256k1_fe_from_storage(secp256k1_fe *r, const secp256k1_fe_storage *a);
/** If flag is true, set *r equal to *a; otherwise leave it. Constant-time. */
/** If flag is true, set *r equal to *a; otherwise leave it. Constant-time. Both *r and *a must be initialized.*/
static void secp256k1_fe_storage_cmov(secp256k1_fe_storage *r, const secp256k1_fe_storage *a, int flag);
/** If flag is true, set *r equal to *a; otherwise leave it. Constant-time. */
/** If flag is true, set *r equal to *a; otherwise leave it. Constant-time. Both *r and *a must be initialized.*/
static void secp256k1_fe_cmov(secp256k1_fe *r, const secp256k1_fe *a, int flag);
#endif /* SECP256K1_FIELD_H */