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;
}
private void MenuItemVerifyFile_Click(object sender, EventArgs e)
{
if (lwVerify.SelectedItems.Count < 1)
{
LogLine("You must select a key");
return;
}
string pubKeyFilename = tbSettingsPublicKeyFolder.Text + Path.DirectorySeparatorChar + lwVerify.SelectedItems[0].Text + ".pubkey";
if (!File.Exists(pubKeyFilename))
{
LogLine("Public key " + pubKeyFilename + " does not exist");
return;
}
DigitalSignature sig = new DigitalSignature();
sig.LoadPublicKey(pubKeyFilename);
FileDialog.Multiselect = false;
FileDialog.Title = "Select file for verification";
if (FileDialog.ShowDialog() != DialogResult.OK)
return;
string dataFilename = FileDialog.FileName;
string sigFilename = dataFilename + ".signature";
if (!File.Exists(sigFilename))
{
LogLine("Signature file " + sigFilename + " does not exist");
return;
}
Enabled = false;
LogLine("Verifying file " + dataFilename + ". Please wait...");
Application.DoEvents();
byte[] signature = null;
bool verified = false;
try
{
signature = sig.LoadSignature(sigFilename);
byte[] bytes = File.ReadAllBytes(dataFilename);
var sha256 = SHA256.Create();
var hashedData = sha256.ComputeHash(bytes);
verified = sig.VerifySignature(hashedData, signature);
}
catch (DigitalSignatureException ex)
{
LogLine(ex.Message);
return;
}
catch (Exception ex)
{
LogLine("Verify error: " + ex.Message);
return;
}
finally
{
Enabled = true;
}
if (verified)
LogLine("Verify ok");
else
LogLine("Verify failed");
}
private void MenuItemNewKey_Click(object sender, EventArgs e)
{
FormName form = new FormName();
if (form.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
string basePrivKeyName = tbSettingsPrivateKeyFolder.Text + Path.DirectorySeparatorChar + form.NewName + ".privkey";
string basePubKeyName = tbSettingsPublicKeyFolder.Text + Path.DirectorySeparatorChar + form.NewName + ".pubkey";
if (File.Exists(basePrivKeyName))
{
LogLine("A private key named " + form.NewName + " already exists");
return;
}
if (File.Exists(basePubKeyName))
{
LogLine("A public key named " + form.NewName + " already exists");
return;
}
Enabled = false;
LogLine("Generating new key. Please wait...");
Application.DoEvents();
DigitalSignature sig = new DigitalSignature();
sig.CreateNewKey();
LogLine("Storing new key as files...");
sig.SaveKeys(basePrivKeyName, basePubKeyName, form.NewPassword);
PopulatePrivateKeyList(ref lwKeys);
LogLine("New key created");
Enabled = true;
}
}
