private byte[] ProcessSymmetricKeyDataForEcdh(IPgpPrivateKey privKey, IList <IBigInteger> symmetricKeyData)
{
var encSymKey = symmetricKeyData[1].ToByteArrayUnsigned();
var privateKey = (ECDHPrivateKeyParameters)privKey.Key;
var publicKey = privateKey.PublicKeyParameters;
var ephemeralKey = ECDHPublicKeyParameters.Create(symmetricKeyData[0], publicKey.PublicKeyParamSet, publicKey.HashAlgorithm, publicKey.SymmetricKeyAlgorithm);
var engine = new RFC6637ECDHEngine();
engine.InitForDecryption(privateKey, ephemeralKey);
return(engine.ProcessBlock(encSymKey, 0, encSymKey.Length));
}
private void AddEdchSessionInfo(byte[] si, ISecureRandom random)
{
ECDHPublicKeyParameters ephemeralPublicKey;
var engine = new RFC6637ECDHEngine();
engine.InitForEncryption(random, (ECDHPublicKeyParameters)_pubKey.GetKey(), _pubKey.GetFingerprint(), out ephemeralPublicKey);
var encSession = engine.ProcessBlock(si, 0, si.Length);
_data = new[]
{
new BigInteger(1, ephemeralPublicKey.Q.GetEncoded()),
};
_extraData = encSession;
}
