ecc_point.cpp

#include <vanetza/security/ecc_point.hpp>
#include <boost/variant/apply_visitor.hpp>
#include <boost/variant/static_visitor.hpp>
 
namespace vanetza
{
namespace security
{
 
class EccPointVisitor : public boost::static_visitor<ByteBuffer>
{
public:
    template<typename T>
    ByteBuffer operator()(const T& point)
    {
        return point.x;
    }
};
 
ByteBuffer convert_for_signing(const EccPoint& ecc_point)
{
    EccPointVisitor visit;
    return boost::apply_visitor(visit, ecc_point);
}
 
class EccPointLengthVisitor : public boost::static_visitor<std::size_t>
{
public:
    std::size_t operator()(const X_Coordinate_Only& x_only) const
    {
        return x_only.x.size();
    }
 
    std::size_t operator()(const Compressed_Lsb_Y_0& y0) const
    {
        return y0.x.size();
    }
 
    std::size_t operator()(const Compressed_Lsb_Y_1& y1) const
    {
        return y1.x.size();
    }
 
    std::size_t operator()(const Uncompressed& unc) const
    {
        return unc.x.size() + unc.y.size();
    }
};
 
std::size_t get_length(const EccPoint& point)
{
    EccPointLengthVisitor visitor;
    return boost::apply_visitor(visitor, point);
}
 
} // namespace security
} // namespace vanetza