private void encryptButton_Click(object sender, EventArgs e)
{
try
{
if (IsSignatureMode())
{
Signer s = GetSigner();
if (s != null)
{
outputText.Text = s.sign(inputText.Text, signKey).ToString();
lblIntermediateValues.Text = s.SignIntermediateValues;
}
}
else
{
EncryptionStrategy s = GetEncryptionStrategy();
if (s != null)
{
outputText.Text = s.encrypt();
}
}
}
catch (Exception err)
{
MessageBox.Show(err.Message, "Ошибка!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
private void decryptButton_Click(object sender, EventArgs e)
{
try
{
if (IsSignatureMode())
{
Signer s = GetSigner(Mode.CheckSignature);
if (s != null)
{
if (s.checkSignature(new DSASignedString(inputText.Text), signKey))
{
System.Windows.Forms.MessageBox.Show("Подпись верна");
}
else
{
System.Windows.Forms.MessageBox.Show("Подпись НЕ верна");
}
lblIntermediateValues.Text = s.CheckSignatureIntermediateValues;
}
}
else
{
EncryptionStrategy s = GetEncryptionStrategy(Mode.Decrypt);
if (s != null)
{
outputText.Text = s.decrypt();
}
}
}
catch (Exception err)
{
MessageBox.Show(err.Message, "Ошибка!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
public EncryptedWorkspaceTests()
{
_workspace = new Workspace("Name", "Description");
_workspace.Version = "1.2.3";
_workspace.Id = 1234;
_workspace.Configuration.AddUser("*****@*****.**", Role.ReadOnly);
_encryptionStrategy = new MockEncryptionStrategy();
}
private EncryptionStrategy GetEncryptionStrategy(Mode mode = Mode.Encrypt)
{
EncryptionStrategy result = null;
String input = inputText.Text;
switch (algorithmDrowdown.Text)
{
case "Железнодорожная изгородь":
try
{
int key = int.Parse(keyInput.Text);
result = new EncryptionStrategies.RailwayFenceEncryptionStrategy(input, key);
}
catch (FormatException err)
{
throw new ArgumentException("Ключ должен быть числом");
}
break;
case "\"Ключевая фраза\"":
result = new EncryptionStrategies.PassPhraseEncryptionStrategy(input, keyInput.Text); break;
case "Метод поворачивающейся решетки":
GridForm gridForm = new GridForm();
if (gridForm.ShowDialog() == DialogResult.OK)
{
result = new EncryptionStrategies.RotatingGridEncryptionStrategy(input, gridForm.GetGrid());
}
break;
case "Шифр Вижинера":
result = new EncryptionStrategies.VigenereEncryptionStrategy(input, keyInput.Text); break;
case "Криптосистема Рабина":
if (rabinKeyForm == null)
{
rabinKeyForm = new RabinKeyForm(mode);
}
rabinKeyForm.Mode = mode;
if (rabinKeyForm.ShowDialog() == DialogResult.OK)
{
result = new EncryptionStrategies.RabinEncryptionStrategy(input, mode == Mode.Encrypt ? rabinKeyForm.PublicKey : rabinKeyForm.PrivateKey);
}
break;
default:
throw new ArgumentException("Выберите метод шифрования");
}
return(result);
}
public IFileReaderBuilder UseEncryption(EncryptionStrategy encryptionStrategy)
{
if (_fileReader == null)
{
InitFileReader(FileType.Text);
}
if (_fileType == FileType.Xml)
{
var reader = (XmlFileReader)_fileReader;
reader.Strict = false;
}
_fileReader = new EncryptedFileReader(_fileReader, encryptionStrategy);
return(this);
}
/// <summary>
/// Encrypts the message and its attachments.
/// </summary>
/// <param name="encryptionStrategy"></param>
internal void Encrypt(EncryptionStrategy encryptionStrategy)
{
if (encryptionStrategy == null)
{
throw new ArgumentNullException(nameof(encryptionStrategy));
}
encryptionStrategy.EncryptMessage();
IsEncrypted = true;
var securityHeader = CreateSecurityHeaderElement();
encryptionStrategy.AppendEncryptionElements(securityHeader);
_encryptionElements = securityHeader.ChildNodes;
}
public EncryptedFileReader(FileReader fileReader,
EncryptionStrategy encryptionStrategy)
: base(fileReader)
{
_encryptionStrategy = encryptionStrategy;
}
public void SetEncryptionStrategy(EncryptionStrategy encryptionStrategy)
{
_encryptionStrategy = encryptionStrategy;
}
