Lines Matching refs:z1
107 /* Compute the x-coordinate x1/z1 for the point (x1/z1)+(x2/x2) in Montgomery
113 static int gf2m_Madd(const EC_GROUP *group, const BIGNUM *x, BIGNUM *x1, BIGNUM *z1,
127 if (!group->meth->field_mul(group, z1, z1, x2, ctx)) goto err;
128 if (!group->meth->field_mul(group, t2, x1, z1, ctx)) goto err;
129 if (!BN_GF2m_add(z1, z1, x1)) goto err;
130 if (!group->meth->field_sqr(group, z1, z1, ctx)) goto err;
131 if (!group->meth->field_mul(group, x1, z1, t1, ctx)) goto err;
141 /* Compute the x, y affine coordinates from the point (x1, z1) (x2, z2)
151 BIGNUM *z1, BIGNUM *x2, BIGNUM *z2, BN_CTX *ctx)
156 if (BN_is_zero(z1))
179 if (!group->meth->field_mul(group, t3, z1, z2, ctx)) goto err;
181 if (!group->meth->field_mul(group, z1, z1, x, ctx)) goto err;
182 if (!BN_GF2m_add(z1, z1, x1)) goto err;
187 if (!group->meth->field_mul(group, z2, z2, z1, ctx)) goto err;
218 BIGNUM *x1, *x2, *z1, *z2;
241 z1 = BN_CTX_get(ctx);
242 if (z1 == NULL) goto err;
248 if (!BN_one(z1)) goto err; /* z1 = 1 */
273 if (!gf2m_Madd(group, &point->X, x1, z1, x2, z2, ctx)) goto err;
278 if (!gf2m_Madd(group, &point->X, x2, z2, x1, z1, ctx)) goto err;
279 if (!gf2m_Mdouble(group, x1, z1, ctx)) goto err;
287 i = gf2m_Mxy(group, &point->X, &point->Y, x1, z1, x2, z2, ctx);
