public static string DeserializateMessage(byte[] message, TlsManager tlsManager, RsaManager rsaManager, out bool isAllSuccess)
{
isAllSuccess = false;
byte[] IV = new byte[16],
hashSum,
digitalSignature = new byte[256],
messageBytes;
for (int i = 0; i < IV.Length; i++)
{
IV[i] = message[i];
}
hashSum = new byte[message[16]];
for (int i = IV.Length + 1, j = 0; j < hashSum.Length; i++, j++)
{
hashSum[j] = message[i];
}
for (int i = IV.Length + 1 + hashSum.Length, j = 0; j < digitalSignature.Length; i++, j++)
{
digitalSignature[j] = message[i];
}
messageBytes = new byte[message.Length - IV.Length - 1 - hashSum.Length - digitalSignature.Length];
for (int i = IV.Length + 1 + hashSum.Length + digitalSignature.Length, j = 0;
j < messageBytes.Length;
i++, j++)
{
messageBytes[j] = message[i];
}
bool isSuccess;
string decryptMessage = tlsManager.DecryptMessage(messageBytes, IV, hashSum, out isSuccess);
string rsaNotParsedKey = decryptMessage.Substring(decryptMessage.IndexOf("|rsaKeyStart|"),
decryptMessage.LastIndexOf("|rsaKeyEnd|") + "|rsaKeyEnd|".Length);
string rsaKey = rsaNotParsedKey.Replace("|rsaKeyStart|", "");
rsaKey = rsaKey.Replace("|rsaKeyEnd|", "");
bool isValidDigitalSignature = rsaManager.IsValidDigitalSignature(hashSum, digitalSignature, rsaKey);
decryptMessage = decryptMessage.Replace(rsaNotParsedKey, "");
if ((isSuccess == true) & (isValidDigitalSignature == true))
{
isAllSuccess = true;
}
return(decryptMessage);
}
public static byte[] SerializateMessage(string message, TlsManager tlsManager, RsaManager rsaManager)
{
byte[] IV,
hashSum,
digitalSignature,
hashSumCount,
messageBytes;
string publicRSAKey = rsaManager.PublicKey;
message = $"|rsaKeyStart|{publicRSAKey}|rsaKeyEnd|{message}";
messageBytes = tlsManager.EncryptMessage(message, out IV, out hashSum);
hashSumCount = new byte[] { (byte)hashSum.Length };
digitalSignature = rsaManager.GetDigitalSignature(hashSum);
return(IV.Concat(hashSumCount.Concat(hashSum.Concat(digitalSignature.Concat(messageBytes)))).ToArray());
}