i am writing an application, with a few crypto-libraries.
In this application i must transfer ECDSA-Keys from the Crypto++ library to another library. To achieve this, i read out the key parameter like cofactor, field, group order, the curve parameters a and b, etc. But, and this is my problem, i can't figure out how i can get the base point G out of the private Key. I am using Crypto++ 5.1. Please, can someone explain this to me?
Below is my test code so you can see what i mean.
Thanks Hendrik
CryptoPP::DL_PrivateKey_EC<CryptoPP::ECP>* privKey = new CryptoPP::DL_PrivateKey_EC<CryptoPP::ECP>;
CryptoPP::DL_GroupParameters_EC<CryptoPP::ECP> parameter =
CryptoPP::DL_GroupParameters_EC<CryptoPP::ECP>(CryptoPP::ASN1::secp192r1());
privKey->Initialize(random_pool, parameter);
std::cout << std::hex << parameter.GetGroupOrder() << std::endl;
std::cout << std::hex << parameter.GetCofactor() << std::endl;
std::cout << std::hex << parameter.GetMaxExponent() << std::endl;
CryptoPP::ECP curve = parameter.GetCurve();
std::cout << std::hex << curve.GetA() << std::endl;
std::cout << std::hex << curve.GetB() << std::endl;
std::cout << std::dec << curve.FieldSize() << std::endl;
std::cout << std::dec << curve.GetField().GetModulus() << std::endl;
