public Message FormMessageFor(PubKey receiversKey, string message)
{
var messageNums = m_converter.ToNumbers(message).ToList();
var encoded = RsaUtility.Encode(messageNums, receiversKey).ToList();
var signature = RsaSignature.MakeSignature(message, m_converter, m_sigSecret).ToList();
var m = Message.FromNumbers(encoded, signature);
_ReleaseList(messageNums);
_ReleaseList(encoded);
_ReleaseList(signature);
return(m);
}
public string ReceiveMessageFrom(SignCertificate senderCertificate, Message received, out bool signatureIsOk)
{
var messageNums = received.GetMessage().ToList();
var messageDecodedNums = RsaUtility.Decode(messageNums, m_decodingKey).ToList();
string message = m_converter.FromNumbers(messageDecodedNums);
var signatureNums = received.GetSignature();
signatureIsOk = RsaSignature.SignatureIsValid(message, signatureNums, m_converter, senderCertificate);
_ReleaseList(messageNums);
_ReleaseList(messageDecodedNums);
_ReleaseList(signatureNums);
return(message);
}
private static void SpeedTest()
{
if (File.Exists(c_speedTestFile))
{
File.Delete(c_speedTestFile);
}
List <string> testPoints = new List <string>();
var sb = new StringBuilder();
for (int i = 1; i <= 200; i++)
{
sb.Append(System.Guid.NewGuid());
if (i % 20 == 0)
{
testPoints.Add(sb.ToString());
}
}
var keyGen = new KeyGenerator();
var keys = new List <KeyGenerator.Key>();
for (int i = 0; i < 15; i++)
{
int byteLength = 16 + 8 * i;
keys.Add(keyGen.GenerateKey(byteLength));
Console.WriteLine($"Generated key with size: {byteLength * 8}");
}
string header = "keyBits, mode (enc/dec), ";
for (int i = 0; i < testPoints.Count; i++)
{
header += $"{testPoints[i].Length} chars, ";
}
header = header.Substring(0, header.Length - 2);
_LogToFile(header);
var watch = new Stopwatch();
for (int keyInd = 0; keyInd < keys.Count; keyInd++)
{
int keySize = 8 * (16 + 8 * keyInd);
var encripted = new List <List <OmgNum> >();
string row = $"{keySize}, enc, ";
var converter = new MessageConverter(16 + 8 * keyInd - 1);
for (int i = 0; i < testPoints.Count; i++)
{
watch.Restart();
var mesageNums = converter.ToNumbers(testPoints[i]).ToList();
encripted.Add(RsaUtility.Encode(mesageNums, keys[keyInd].pub).ToList());
foreach (var n in mesageNums)
{
n.Release();
}
watch.Stop();
row += $"{watch.ElapsedMilliseconds}, ";
}
row = row.Substring(0, row.Length - 2);
_LogToFile(row);
row = $"{keySize}, dec, ";
for (int i = 0; i < testPoints.Count; i++)
{
watch.Restart();
var decodedNums = RsaUtility.Decode(encripted[i], keys[keyInd].priv).ToList();
string text = converter.FromNumbers(decodedNums);
foreach (var n in decodedNums)
{
n.Release();
}
watch.Stop();
row += $"{watch.ElapsedMilliseconds}, ";
if (text != testPoints[i])
{
Console.WriteLine($"Failed at index {i} with keylength {keySize}");
}
}
row = row.Substring(0, row.Length - 2);
_LogToFile(row);
Console.WriteLine($"Tested key {keyInd + 1} / {keys.Count}.");
}
}
