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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src/group.h
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@@ -132,7 +132,7 @@ static void secp256k1_ge_to_storage(secp256k1_ge_storage *r, const secp256k1_ge
/** Convert a group element back from the storage type. */
static void secp256k1_ge_from_storage(secp256k1_ge *r, const secp256k1_ge_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_ge_storage_cmov(secp256k1_ge_storage *r, const secp256k1_ge_storage *a, int flag);
/** Rescale a jacobian point by b which must be non-zero. Constant-time. */