public void TestTwofishFileDecryption()
{
byte[] data = new byte[10000];
new Random().NextBytes(data); // fill random data
using (var senderRsa = new RSACryptoServiceProvider())
{
var senderPrivateKey = senderRsa.ExportParameters(true);
using (var receiverRsa = new RSACryptoServiceProvider())
{
var receiverPrivateKey = receiverRsa.ExportParameters(true);
var receiverPublicKey = receiverRsa.ExportParameters(false);
CryptCombo combo = new CryptCombo(MD5.Create(), new TwofishMachine());
MemoryStream cryptedFileStream = new MemoryStream();
OriginalFile originFile = new OriginalFile(new MemoryStream(data), ".java");
FileCryptor cryptor = new FileCryptor(senderPrivateKey, receiverPublicKey);
cryptor.Encrypt(originFile, cryptedFileStream, combo);
MemoryStream decryptedStream = new MemoryStream();
EncryptedFile newCryptedFile = EncryptedFileChecker.Parse(cryptedFileStream);
FileDecryptor decryptor = new FileDecryptor(receiverPrivateKey);
decryptor.Decrypt(newCryptedFile, decryptedStream);
Assert.IsTrue(decryptedStream.ToArray().SequenceEqual(data));
}
}
}
public void EncryptFile(OriginalFile input, FileStream output, ProgressReporter reporter = null)
{
var cert = new X509Certificate2(this.receiver.PublicCertificate);
if (cert == null)
{
reporter?.Log("Receiver certificate error. Aborting.");
}
else
{
reporter?.Log("Verifying certificate...");
if (CertificateValidator.VerifyCertificate(cert) is false)
{
reporter?.Log("Receiver's certificate is invalid. Aborting.");
}
else
{
reporter?.Log("Receiver's certificate is valid.");
reporter?.Log("Encrypting file...");
FileCryptor cryptor = new FileCryptor(this.currentUser.PrivateKey, ((RSACryptoServiceProvider)cert.PublicKey.Key).ExportParameters(false));
cryptor.Encrypt(input, output, this.combo, reporter.SetPercentage);
reporter?.Log("File encryption complete.");
}
}
}
private static void FileEncrypt()
{
Console.WriteLine("Введите простые числа P и Q");
var p = ulong.Parse(Console.ReadLine() ??
throw new InvalidOperationException("Пустая строка - число"));
var q = ulong.Parse(Console.ReadLine() ??
throw new InvalidOperationException("Пустая строка - число"));
var fc = new FileCryptor(p, q);
Console.WriteLine("Введите имя файла");
fc.Encrypt(Console.ReadLine());
}