Hi there, I'm trying to retrieve a public key, given x and y with the following code:
//x and y came from a webservice std::string x = "40BA49FCBA45C7EEB2261B1BE0EBC7C14D6484B9EF8A23B060EBE67F97252BBC"; std::string y = "00987BA49DF364A0C9926F2B6DE1BAF46068A13A2C5C9812B2F3451F48B75719EE"; std::string pt = x + y; CryptoPP::HexDecoder decoder; decoder.Put((byte*)pt.data(), pt.size()); decoder.MessageEnd(); CryptoPP::ECP::Point q; size_t len = decoder.MaxRetrievable(); q.identity = false; q.x.Decode(decoder, len / 2); q.y.Decode(decoder, len / 2); //Wrong value CryptoPP::ECDSA<CryptoPP::ECP, CryptoPP::SHA256>::PublicKey publicKey; publicKey.Initialize(CryptoPP::ASN1::brainpoolP256r1(), q); After Initializing the public key, I try to validate it: CryptoPP::ECDSA<CryptoPP::ECP, CryptoPP::SHA256>::Verifier verifier(publicKey); CryptoPP::AutoSeededRandomPool prng; bool result = publicKey.Validate(prng, 3); result is always false and I tried to get the int-values of x and y with the following: const CryptoPP::ECP::Point& qq = publicKey.GetPublicElement(); std::ostringstream cou; cou << "Q.x: " << qq.x; cou << "Q.y: " << qq.y; OutputDebugStringA(cou.str().c_str()); While x seems to be okay, y is not. And I don't know what to do... Is there anybody with a similar problem and a possible solution? Best regards -- You received this message because you are subscribed to the Google Groups "Crypto++ Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to cryptopp-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/cryptopp-users/0e460928-1dde-4d4e-8326-934e0427ea46n%40googlegroups.com.