method

to_bn

v2_4_6 - Show latest stable - 0 notes - Class: Point

to_bn(p1 = v1) public

Convert the EC point into an octet string and store in an OpenSSL::BN. If conversion_form is given, the point data is converted using the specified form. If not given, the default form set in the EC::Group object is used.

See also EC::Point#point_conversion_form=.

Show source

static VALUE
ossl_ec_point_to_bn(int argc, VALUE *argv, VALUE self)
{
    EC_POINT *point;
    VALUE form_obj, bn_obj;
    const EC_GROUP *group;
    point_conversion_form_t form;
    BIGNUM *bn;

    GetECPoint(self, point);
    GetECPointGroup(self, group);
    rb_scan_args(argc, argv, "01", &form_obj);
    if (NIL_P(form_obj))
        form = EC_GROUP_get_point_conversion_form(group);
    else
        form = parse_point_conversion_form_symbol(form_obj);

    bn_obj = rb_obj_alloc(cBN);
    bn = GetBNPtr(bn_obj);

    if (EC_POINT_point2bn(group, point, form, bn, ossl_bn_ctx) == NULL)
        ossl_raise(eEC_POINT, "EC_POINT_point2bn");

    return bn_obj;
}

to_bn

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