From 5d94760cce509f7e98694589d979255139715195 Mon Sep 17 00:00:00 2001 From: orignal Date: Wed, 11 Nov 2015 16:24:56 -0500 Subject: [PATCH] eliminate some transient BIGNUM allocations --- Signature.cpp | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) diff --git a/Signature.cpp b/Signature.cpp index 5951c74f..a415775f 100644 --- a/Signature.cpp +++ b/Signature.cpp @@ -202,22 +202,20 @@ namespace crypto if (!z) { z = BN_new (); BN_one (z); } if (!t) { t = BN_new (); BN_mul (t, p.x, p.y, ctx); } - BIGNUM * A = BN_new (), * B = BN_new (), * C = BN_new (), * D = BN_new (); - BN_sqr (A, p.x, ctx); // A = x^2 - BN_sqr (B, p.y, ctx); // B = y^2 - BN_sqr (C, t, ctx); - BN_mul (C, C, d, ctx); // C = d*t^2 - BN_sqr (D, z, ctx); // D = z^2 + BN_sqr (x2, p.x, ctx); // x2 = A = x^2 + BN_sqr (y2, p.y, ctx); // y2 = B = y^2 + BN_sqr (t2, t, ctx); + BN_mul (t2, t2, d, ctx); // t2 = C = d*t^2 + BN_sqr (z2, z, ctx); // z2 = D = z^2 BIGNUM * E = BN_new (), * F = BN_new (), * G = BN_new (), * H = BN_new (); // E = (x+y)*(x+y)-A-B = x^2+y^2+2xy-A-B = 2xy BN_mul (E, p.x, p.y, ctx); BN_mul_word (E, 2); // E =2*x*y - BN_sub (F, D, C); // F = D - C - BN_add (G, D, C); // G = D + C - BN_add (H, B, A); // H = B + A + BN_sub (F, z2, t2); // F = D - C + BN_add (G, z2, t2); // G = D + C + BN_add (H, y2, x2); // H = B + A - BN_free (A); BN_free (B); BN_free (C); BN_free (D); if (!p.z) BN_free (z); if (!p.t) BN_free (t);