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fixed clobbed z and t for Double

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orignal 2015-11-11 15:19:00 -05:00
parent 64295e3541
commit 79517a0ba3
1 changed files with 9 additions and 9 deletions
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18
Signature.cpp
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@ -200,24 +200,24 @@ namespace crypto
BIGNUM * x2 = BN_new (), * y2 = BN_new (), * z2 = BN_new (), * t2 = BN_new ();
BIGNUM * z = p.z, * t = p.t;
if (!z) { z = BN_new (); BN_one (z); }
BN_sqr (z, z, ctx); // z^2 (D)
if (!t) { t = BN_new (); BN_mul (t, p.x, p.y, ctx); }
BN_sqr (t, t, ctx);
BN_mul (t, t, d, ctx); // d*t^2 (C)
if (!t) { t = BN_new (); BN_mul (t, p.x, p.y, ctx); }
BIGNUM * A = BN_new (), * B = BN_new ();
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 (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
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, z, t); // F = D - C = z - t
BN_add (G, z, t); // G = D + C = z + t
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_free (A); BN_free (B);
BN_free (A); BN_free (B); BN_free (C); BN_free (D);
if (!p.z) BN_free (z);
if (!p.t) BN_free (t);