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Abstract out verify logic for fe_from_storage

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Pieter Wuille
2022-01-28 19:02:03 -05:00
parent 76d31e5047
commit 3167646072
4 changed files with 17 additions and 13 deletions
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8
src/field.h
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@@ -94,6 +94,7 @@ static const secp256k1_fe secp256k1_const_beta = SECP256K1_FE_CONST(
# define secp256k1_fe_sqr secp256k1_fe_impl_sqr
# define secp256k1_fe_cmov secp256k1_fe_impl_cmov
# define secp256k1_fe_to_storage secp256k1_fe_impl_to_storage
# define secp256k1_fe_from_storage secp256k1_fe_impl_from_storage
#endif /* !defined(VERIFY) */
/** Normalize a field element.
@@ -271,7 +272,12 @@ static void secp256k1_fe_inv_var(secp256k1_fe *r, const secp256k1_fe *a);
*/
static void secp256k1_fe_to_storage(secp256k1_fe_storage *r, const secp256k1_fe *a);
/** Convert a field element back from the storage type. */
/** Convert a field element back from secp256k1_fe_storage.
*
* On input, r need not be initialized.
* Performs {r = a}.
* On output, r will be normalized and will have magnitude 1.
*/
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. Both *r and *a must be initialized.*/