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Optimize verification: avoid field inverse

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Suggested by Greg Maxwell.
This commit is contained in:
Pieter Wuille
2014-11-29 00:07:33 +01:00
parent a098f783fc
commit ce7eb6fb3d
3 changed files with 28 additions and 21 deletions
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4
src/group.h
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@@ -81,8 +81,8 @@ static void secp256k1_gej_set_xy(secp256k1_gej_t *r, const secp256k1_fe_t *x, co
/** Set a group element (jacobian) equal to another which is given in affine coordinates. */
static void secp256k1_gej_set_ge(secp256k1_gej_t *r, const secp256k1_ge_t *a);
/** Get the X coordinate of a group element (jacobian). */
static void secp256k1_gej_get_x_var(secp256k1_fe_t *r, const secp256k1_gej_t *a);
/** Compare the X coordinate of a group element (jacobian). */
static int secp256k1_gej_eq_x_var(const secp256k1_fe_t *x, const secp256k1_gej_t *a);
/** Set r equal to the inverse of a (i.e., mirrored around the X axis) */
static void secp256k1_gej_neg_var(secp256k1_gej_t *r, const secp256k1_gej_t *a);