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(); }