I do not find any function to load the public key. I've tried to use
BERDecode on DH
Domain http://www.cryptopp.com/docs/ref/class_d_h___domain.html but without
success. I've tried too declaring a CryptoPP::ECIES< CryptoPP::ECP
>::PublicKey and using .Load, but nothing. I've managed to pass from
SecByteBlock to Byte but now i would need to load a public key in .der
format on this.
Here's is the code I have at the moment.
int main( int, char** ) {
OID CURVE = secp256k1();
AutoSeededX917RNG<AES> rng;
/* A */
ECDH < ECP >::Domain dhA( CURVE );
byte privA[dhA.PrivateKeyLength()];
byte pubA[dhA.PublicKeyLength()];
dhA.GenerateKeyPair(rng, privA, pubA);
byte sharedA[dhA.AgreedValueLength()];
/* B */
ECDH < ECP >::Domain dhB( CURVE );
byte privB[dhB.PrivateKeyLength()];
byte pubB[dhB.PublicKeyLength()];
dhB.GenerateKeyPair(rng, privB, pubB);
byte sharedB[dhB.AgreedValueLength()];
/* AGREEMENT */
dhA.Agree (sharedA, privA, pubB);
dhB.Agree (sharedB, privB, pubA);
if ((dhA.AgreedValueLength() != dhB.AgreedValueLength()) || (memcmp
(sharedB, sharedA, dhA.AgreedValueLength()) != 0)) {
cout << "Something wrong" << endl;
}
else {
cout << "Agreed to shared secret" << endl;
}
return 0;
}
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