Method Initialize

src/cryptopp/eccrypto.cpp:442–466

}

template <class EC> void DL_GroupParameters_EC<EC>::Initialize(const OID &oid)
{
	const EcRecommendedParameters<EllipticCurve> *begin, *end;
	GetRecommendedParameters(begin, end);
	const EcRecommendedParameters<EllipticCurve> *it = std::lower_bound(begin, end, oid, OIDLessThan());
	if (it == end || it->oid != oid)
		throw UnknownOID();

	const EcRecommendedParameters<EllipticCurve> &param = *it;
	m_oid = oid;
	member_ptr<EllipticCurve> ec(param.NewEC());
	this->m_groupPrecomputation.SetCurve(*ec);

	StringSource ssG(param.g, true, new HexDecoder);
	Element G;
	bool result = GetCurve().DecodePoint(G, ssG, (size_t)ssG.MaxRetrievable());
	this->SetSubgroupGenerator(G);

	// TODO: this fails in practice. Should it throw?
	CRYPTOPP_UNUSED(result); CRYPTOPP_ASSERT(result);

	StringSource ssN(param.n, true, new HexDecoder);
	m_n.Decode(ssN, (size_t)ssN.MaxRetrievable());
	m_k = param.h;
}

template <class EC>
bool DL_GroupParameters_EC<EC>::GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const