public byte[] createSharedSecret(KeyAgreement keyAgreement)
{
string aG_x = BitConverter.ToString(keyAgreement.X).Replace("-", string.Empty);
string aG_y = BitConverter.ToString(keyAgreement.Y).Replace("-", string.Empty);
var bG_x = new StringBuilder(256);
var bG_y = new StringBuilder(256);
var strSharedSecret = new StringBuilder(256);
int st = ECDH.CreateSharedSecret(aG_x, aG_y, bG_x, bG_y, strSharedSecret);
// byte配列(32)にする
var sharedSecret = Common.HexStringToBytes(strSharedSecret.ToString());
My_KeyAgreement = new KeyAgreement(2, -7, 1, bG_x.ToString(), bG_y.ToString());
return(sharedSecret);
}
public async Task <CTAPResponse> GetKeyAgreement(DevParam devParam)
{
var cbor = CBORObject.NewMap();
// 0x01:pinProtocol = 1固定
cbor.Add(0x01, 1);
// 0x02:subCommand = 0x02:getKeyAgreement
cbor.Add(0x02, 0x02);
var resi = await sendCommandandResponse(devParam, 0x06, cbor);
var response = new CTAPResponse(resi);
if (resi.ResponseDataCbor != null)
{
Authenticator_KeyAgreement = new KeyAgreement(resi.ResponseDataCbor);
}
return(response);
}
