public async Task <String> RetrieveDHSessionKey(String PublickKey)
{
String DecryptedServerNumber;
String readString = await ActivitySocket.read();
ReadObj = JsonParse.ReadObject(readString);
if (FingerPrint.Verification(ReadObj.getServerPrimeNumber(), PublickKey, ReadObj.getFingerPrint()))
{
if (MacAlgProvider.VerifyHMAC(ReadObj.getServerPrimeNumber(), SymmetricKey.StrKeyBase64,
ReadObj.getHmacHash()))
{
DecryptedServerNumber = AesEncryption.AES_Decrypt(ReadObj.getServerPrimeNumber(),
SymmetricKey.StrKeyBase64);
}
else
{
throw new Exception("Integrity of SymmetricKey canot verified");
}
}
else
{
throw new Exception("Integrity of RSA canot verified");
}
return(GeneratoreMachine.SessionDHGenerator(DecryptedServerNumber));
}
public async Task <String> ReceiveDHEncryptedMessage(String PublicKey)
{
ReadObj = JsonParse.ReadObject(await ActivitySocket.read());
if (FingerPrint.Verification(ReadObj.getEncryptedMessage(), PublicKey, ReadObj.getFingerPrint()))
{
if (MacAlgProvider.VerifyHMAC(ReadObj.getEncryptedMessage(), sessionKey.SessionKey,
ReadObj.getHmacHash()))
{
return(AesEncryption.AES_Decrypt(ReadObj.getEncryptedMessage(),
sessionKey.SessionKey));
}
else
{
throw new Exception("Integrity of SymmetricKey canot verified");
}
}
else
{
throw new Exception("Integrity of RSA canot verified");
}
}