static void ComparisonTest()
{
var filePath = Directory.GetCurrentDirectory() + "/test.csv";
var lines = new List <string>();
var message = "AAAAAAAA";
var timer = new Stopwatch();
lines.Add("Characters,DES3,RSA");
for (var j = 0; j < 100; j++)
{
timer.Start();
for (var i = 0; i < 100; i++)
{
var symmetricKey = Symmetric.Generate3DESKey();
var encrypted = Symmetric.Encrypt3DES(symmetricKey, message.GetBytes());
var decrypted = Symmetric.Decrypt3DES(symmetricKey, encrypted);
if (decrypted.GetString() != message)
{
Console.WriteLine("ERROR: Encryption Failed");
return;
}
}
timer.Stop();
var symmetricTime = timer.ElapsedMilliseconds;
timer.Reset();
timer.Start();
for (var i = 0; i < 100; i++)
{
var asymetricKey = Asymmetric.GenerateRSAKeys();
var encrypted = Asymmetric.EncryptRSA(asymetricKey.Public, message.GetBytes());
var decrypted = Asymmetric.DecryptRSA(asymetricKey.Private, encrypted);
if (decrypted.GetString() != message)
{
Console.WriteLine("ERROR: Encryption Failed");
return;
}
}
timer.Stop();
var asymetricTime = timer.ElapsedMilliseconds;
lines.Add(string.Format("{0},{1},{2}", message.Length, symmetricTime, asymetricTime));
message += "AAAAAAAA";
}
File.WriteAllLines(filePath, lines);
}
static void RunBasicScenarioDebug(string message)
{
var messageBytes = message.GetBytes();
var hash = message.GetHash(HashTypes.SHALE);
var aliceKeys = Asymmetric.GenerateRSAKeys();
var bobKeys = Asymmetric.GenerateRSAKeys();
var encryptedHash = Asymmetric.EncryptRSA(aliceKeys.Private, hash);
var augmentedMessage = Helper.CombineByteArrays(messageBytes, encryptedHash);
var DES3Key = Symmetric.Generate3DESKey();
var encryptedMessage = Symmetric.Encrypt3DES(DES3Key, augmentedMessage);
var encryptedKey = Asymmetric.EncryptRSA(bobKeys.Public, DES3Key);
var transmissionMessage = Helper.CombineByteArrays(encryptedMessage, encryptedKey);
var recoveredEncryptedKey = new byte[30];
var recoveredCipherText = new byte[transmissionMessage.Length - recoveredEncryptedKey.Length];
SplitMessage(ref recoveredEncryptedKey, ref recoveredCipherText, transmissionMessage);
var decrypedDES3Key = Asymmetric.DecryptRSA(bobKeys.Private, recoveredEncryptedKey);
var decryptedMessage = Symmetric.Decrypt3DES(decrypedDES3Key, recoveredCipherText);
var recoveredSignature = new byte[5];
var recoveredMessage = new byte[decryptedMessage.Length - recoveredSignature.Length];
SplitMessage(ref recoveredSignature, ref recoveredMessage, decryptedMessage);
var decryptedHash = Asymmetric.DecryptRSA(aliceKeys.Public, recoveredSignature);
var recoveredMessageHash = recoveredMessage.GetString().GetHash(HashTypes.SHALE);
if (decryptedHash.SequenceEqual(recoveredMessageHash))
{
Console.WriteLine("Hashes are identical");
Console.WriteLine("This means we can be sure the message is from Alice and was unaltered");
}
else
{
Console.WriteLine("Hashes are different");
Console.WriteLine("This means either the message was not from Alice, or it was altered during transmission");
}
}
static void CompareSpeeds(string message)
{
var timer = new Stopwatch();
var messageBytes = message.GetBytes();
var symmetricKey = Symmetric.Generate3DESKey();
var asymetricKey = Asymmetric.GenerateRSAKeys();
timer.Start();
for (var i = 0; i < 100; i++)
{
var encrypted = Symmetric.Encrypt3DES(symmetricKey, messageBytes);
var decrypted = Symmetric.Decrypt3DES(symmetricKey, encrypted);
if (decrypted.GetString() != message)
{
Console.WriteLine("ERROR: Encryption Failed");
return;
}
}
timer.Stop();
var symmetricTime = timer.ElapsedMilliseconds;
timer.Reset();
timer.Start();
for (var i = 0; i < 100; i++)
{
var encrypted = Asymmetric.EncryptRSA(asymetricKey.Public, messageBytes);
var decrypted = Asymmetric.DecryptRSA(asymetricKey.Private, encrypted);
if (decrypted.GetString() != message)
{
Console.WriteLine("ERROR: Encryption Failed");
return;
}
}
timer.Stop();
var asymetricTime = timer.ElapsedMilliseconds;
Console.WriteLine("Symmetric Encryption took {0} ms to encrypt and decrypt 100 times", symmetricTime);
Console.WriteLine("Asymmetric Encryption took {0} ms to encrypt and decrypt 100 times", asymetricTime);
}
static void RunBasicScenario(string message, bool fileOutput = false, string filePath = null)
{
if (fileOutput)
{
if (filePath == null)
{
filePath = Directory.GetCurrentDirectory() + @"\BasicScenario.txt";
}
Output.SetFileOutPut(filePath);
}
var messageBytes = message.GetBytes();
Console.WriteLine("Begining basic scenario with message");
Console.WriteLine(message);
WriteByteArray(messageBytes);
WriteGap();
var hash = message.GetHash(HashTypes.SHALE);
Console.WriteLine("Hash computed");
WriteByteArray(hash);
WriteGap();
var aliceKeys = Asymmetric.GenerateRSAKeys();
var bobKeys = Asymmetric.GenerateRSAKeys();
Console.WriteLine("RSA keys generated");
Console.WriteLine("Alice: \n{0}", aliceKeys);
Console.WriteLine("Bob: \n{0}", bobKeys);
WriteGap();
var encryptedHash = Asymmetric.EncryptRSA(aliceKeys.Private, hash);
Console.WriteLine("Hash encrypted with Alice's private Key");
WriteByteArray(encryptedHash);
WriteGap();
var augmentedMessage = Helper.CombineByteArrays(messageBytes, encryptedHash);
Console.WriteLine("Combined original message and encrypted hash.");
WriteByteArray(augmentedMessage);
WriteGap();
var DES3Key = Symmetric.Generate3DESKey();
Console.WriteLine("DES3 Key Generated");
WriteByteArray(DES3Key);
WriteGap();
var encryptedMessage = Symmetric.Encrypt3DES(DES3Key, augmentedMessage);
Console.WriteLine("Combined message encrypted with DES3 encryption");
WriteByteArray(encryptedMessage);
WriteGap();
var encryptedKey = Asymmetric.EncryptRSA(bobKeys.Public, DES3Key);
Console.WriteLine("DES3 Encrypted with bob's public key");
WriteByteArray(encryptedKey);
WriteGap();
var transmissionMessage = Helper.CombineByteArrays(encryptedMessage, encryptedKey);
Console.WriteLine("Encrypted Message and encrypted session key combined for transmission");
WriteByteArray(encryptedKey);
WriteGap();
/** --------------------------------------------------------------------------------------- **/
Console.WriteLine("Simulating Transmission");
Console.Write("[");
Console.CursorLeft = 21;
Console.Write("]");
Console.CursorLeft = 1;
for (var i = 0; i < 20; i++)
{
Console.Write("-");
Thread.Sleep(100);
}
WriteGap();
/** --------------------------------------------------------------------------------------- **/
var recoveredEncryptedKey = new byte[30];
var recoveredCipherText = new byte[transmissionMessage.Length - recoveredEncryptedKey.Length];
SplitMessage(ref recoveredEncryptedKey, ref recoveredCipherText, transmissionMessage);
Console.WriteLine("Split transmission message into key and ciphertext\n");
Console.WriteLine("Key");
WriteByteArray(recoveredEncryptedKey);
Console.WriteLine();
Console.WriteLine("Ciphertext");
WriteByteArray(recoveredCipherText);
WriteGap();
var decrypedDES3Key = Asymmetric.DecryptRSA(bobKeys.Private, recoveredEncryptedKey);
Console.WriteLine("Decrypted DES3 key using bob's private key");
WriteByteArray(decrypedDES3Key);
WriteGap();
var decryptedMessage = Symmetric.Decrypt3DES(decrypedDES3Key, recoveredCipherText);
Console.WriteLine("Decrypted ciphertext using decrypted DES3 Key");
WriteByteArray(decryptedMessage);
WriteGap();
var recoveredSignature = new byte[5];
var recoveredMessage = new byte[decryptedMessage.Length - recoveredSignature.Length];
SplitMessage(ref recoveredSignature, ref recoveredMessage, decryptedMessage);
Console.WriteLine("Split ciphertext into message and signature\n");
Console.WriteLine("Message");
WriteByteArray(recoveredMessage);
Console.WriteLine();
Console.WriteLine("signature");
WriteByteArray(recoveredSignature);
WriteGap();
var decryptedHash = Asymmetric.DecryptRSA(aliceKeys.Public, recoveredSignature);
Console.WriteLine("Signature decrypted uusing alice's public key");
WriteByteArray(decryptedHash);
WriteGap();
var recoveredMessageHash = recoveredMessage.GetString().GetHash(HashTypes.SHALE);
Console.WriteLine("Compare two hashes\n");
Console.WriteLine("Generated by sender");
WriteByteArray(decryptedHash);
Console.WriteLine();
Console.WriteLine("Generated by reciever");
WriteByteArray(recoveredMessageHash);
WriteGap();
if (decryptedHash.SequenceEqual(recoveredMessageHash))
{
Console.WriteLine("Hashes are identical");
Console.WriteLine("This means we can be sure the message is from Alice and was unaltered");
}
else
{
Console.WriteLine("Hashes are different");
Console.WriteLine("This means either the message was not from Alice, or it was altered during transmission");
}
Output.Dispose();
}
