private void btnExportPubKey_Click(object sender, EventArgs e)
{
if (lwKeys.SelectedItems.Count < 1)
return;
string privKeyFilename = tbSettingsPrivateKeyFolder.Text + Path.DirectorySeparatorChar + lwKeys.SelectedItems[0].Text + ".privkey";
if (!File.Exists(privKeyFilename))
{
LogLine("Private key " + privKeyFilename + " does not exist");
return;
}
FormPass form = new FormPass();
if (form.ShowDialog() != DialogResult.OK)
return;
string password = form.Password;
DigitalSignature sig = new DigitalSignature();
try
{
sig.LoadKeys(privKeyFilename, password);
}
catch (DigitalSignatureException ex)
{
LogLine(ex.Message);
}
catch (Exception ex)
{
LogLine("LoadKeys: An error has occurred. " + ex.Message);
return;
}
SaveFileDialog.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
SaveFileDialog.Filter = "Public keys | *.pubkey";
if (SaveFileDialog.ShowDialog() == DialogResult.OK)
sig.SavePublicKey(SaveFileDialog.FileName);
}
private void MenuItemSignFile_Click(object sender, EventArgs e)
{
if (lwSign.SelectedItems.Count < 1)
{
LogLine("You must select a key");
return;
}
string privKeyFilename = tbSettingsPrivateKeyFolder.Text + Path.DirectorySeparatorChar + lwSign.SelectedItems[0].Text + ".privkey";
string pubKeyFilename = tbSettingsPublicKeyFolder.Text + Path.DirectorySeparatorChar + lwSign.SelectedItems[0].Text + ".pubkey";
if (!File.Exists(privKeyFilename))
{
LogLine("Private key " + privKeyFilename + " does not exist");
return;
}
if (!File.Exists(pubKeyFilename))
{
LogLine("Public key " + pubKeyFilename + " does not exist");
return;
}
FormPass form = new FormPass();
if (form.ShowDialog() != DialogResult.OK)
return;
string password = form.Password;
DigitalSignature sig = new DigitalSignature();
try
{
sig.LoadKeys(privKeyFilename, password);
}
catch(Exception ex)
{
LogLine("Invalid password");
return;
}
FileDialog.Multiselect = true;
FileDialog.Title = "Select files for signing";
if (FileDialog.ShowDialog() != DialogResult.OK)
return;
Enabled = false;
LogLine("Signing files. Please wait...");
Application.DoEvents();
foreach (string filename in FileDialog.FileNames)
{
byte[] bytes = File.ReadAllBytes(filename);
var sha256 = SHA256.Create();
var hashedData = sha256.ComputeHash(bytes);
var signature = sig.SignData(hashedData);
string signatureFilename = filename + ".signature";
sig.SaveSignature(signatureFilename, signature);
}
string dirName = "";
if(FileDialog.FileNames.Length > 0)
dirName = Path.GetDirectoryName(FileDialog.FileNames[0]);
LogLine("Signatures created in directory " + dirName);
Enabled = true;
}