ec_lib.c

		return -1;
		}
	return group->meth->point_cmp(group, a, b, ctx);
	}


int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx)
	{
	if (group->meth->make_affine == 0)
		{
		ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
		return 0;
		}
	if (group->meth != point->meth)
		{
		ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS);
		return 0;
		}
	return group->meth->make_affine(group, point, ctx);
	}


int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, EC_POINT *points[], BN_CTX *ctx)
	{
	size_t i;

	if (group->meth->points_make_affine == 0)
		{
		ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
		return 0;
		}
	for (i = 0; i < num; i++)
		{
		if (group->meth != points[i]->meth)
			{
			ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS);
			return 0;
			}
		}
	return group->meth->points_make_affine(group, num, points, ctx);
	}


/* Functions for point multiplication.
 *
 * If group->meth->mul is 0, we use the wNAF-based implementations in ec_mult.c;
 * otherwise we dispatch through methods.
 */

int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar,
	size_t num, const EC_POINT *points[], const BIGNUM *scalars[], BN_CTX *ctx)
	{
	if (group->meth->mul == 0)
		/* use default */
		return ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx);

	return group->meth->mul(group, r, scalar, num, points, scalars, ctx);
	}

int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *g_scalar,
	const EC_POINT *point, const BIGNUM *p_scalar, BN_CTX *ctx)
	{
	/* just a convenient interface to EC_POINTs_mul() */

	const EC_POINT *points[1];
	const BIGNUM *scalars[1];

	points[0] = point;
	scalars[0] = p_scalar;

	return EC_POINTs_mul(group, r, g_scalar, (point != NULL && p_scalar != NULL), points, scalars, ctx);
	}

int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx)
	{
	if (group->meth->mul == 0)
		/* use default */
		return ec_wNAF_precompute_mult(group, ctx);

	if (group->meth->precompute_mult != 0)
		return group->meth->precompute_mult(group, ctx);
	else
		return 1; /* nothing to do, so report success */
	}

int EC_GROUP_have_precompute_mult(const EC_GROUP *group)
	{
	if (group->meth->mul == 0)
		/* use default */
		return ec_wNAF_have_precompute_mult(group);

	if (group->meth->have_precompute_mult != 0)
		return group->meth->have_precompute_mult(group);
	else
		return 0; /* cannot tell whether precomputation has been performed */
	}