private async void GenerateCertificatesAsync()
{
try
{
if (!this.ValidateControls())
{
UpdateStatusStrip("Please fill all required fields.");
return;
}
var savePath = this.textBoxSavePath.Text;
if (!Directory.Exists(savePath))
{
throw new Exception("Destination directory does not exist.");
}
if (Directory.GetFiles(savePath).Length > 0)
{
throw new Exception("Destination directory must be empty.");
}
UpdateStatusStrip("Generating Certificate files...");
ToogleControls(enabled: false);
var now = DateTime.UtcNow;
var keySize = Convert.ToUInt32(this.comboBoxKeySize.SelectedItem);
var validityInMonths = Convert.ToInt32(this.comboBoxValidity.SelectedItem);
var serialNumber = Convert.ToInt64(this.numericUpDownSerialNumber.Value);
await Task.Run(() =>
{
var certificateBuilderResult = new CACertificateBuilder()
.WithSerialNumberConfiguration(this.checkBoxRandomSerialNumber.Checked, serialNumber - 1)
.SetKeySize(keySize)
.SetSubjectDN(this.textBoxCN.Text + " CA", this.textBoxOU.Text, this.textBoxO.Text, null, this.textBoxC.Text)
.SetNotBefore(now)
.SetNotAfter(now.AddMonths(validityInMonths))
.Build();
var pkcs12Data = certificateBuilderResult.ExportCertificate(this.textBoxPassword.Text.ToSecureString());
var sslCertificateBuilder = new SSLCertificateBuilder()
.WithSerialNumberConfiguration(this.checkBoxRandomSerialNumber.Checked, serialNumber)
.SetKeySize(keySize)
.SetSubjectDN(this.textBoxCN.Text, this.textBoxOU.Text, this.textBoxO.Text, null, this.textBoxC.Text)
.SetNotBefore(now)
.SetNotAfter(now.AddMonths(validityInMonths))
.SetIssuerCertificate(pkcs12Data, this.textBoxPassword.Text.ToSecureString());
if (this.checkBoxClientAuthentication.Checked)
{
sslCertificateBuilder = sslCertificateBuilder.SetClientAuthKeyUsage();
}
;
if (this.checkBoxServerAuthentication.Checked)
{
sslCertificateBuilder = sslCertificateBuilder.SetServerAuthKeyUsage();
}
;
if (!this.textBoxSAN.Text.IsNullOrEmpty())
{
var sans = this.textBoxSAN.Text.Split(';').Select(x => x.Trim()).ToList();
sslCertificateBuilder = sslCertificateBuilder.SetSubjectAlternativeNames(sans);
}
;
var sslCertificateBuilderResult = sslCertificateBuilder.Build();
File.WriteAllBytes(Path.Combine(savePath, "caCertificate.p12"), pkcs12Data);
if (this.checkBoxCertificateExportCrt.Checked)
{
var certData = certificateBuilderResult.Certificate.ExportPublicKeyCertificate();
File.WriteAllBytes(Path.Combine(savePath, "caCertificate.crt"), certData);
}
var sslPkcs12Data = sslCertificateBuilderResult.ExportCertificate(this.textBoxPassword.Text.ToSecureString());
File.WriteAllBytes(Path.Combine(savePath, "sslCertificate.p12"), sslPkcs12Data);
if (this.checkBoxCertificateExportCrt.Checked)
{
var sslCertData = sslCertificateBuilderResult.Certificate.ExportPublicKeyCertificate();
File.WriteAllBytes(Path.Combine(savePath, "sslCertificate.crt"), sslCertData);
}
});
UpdateStatusStrip("Certificates generated successfully.");
}
catch (Exception ex)
{
MessageBox.Show(this, $"Error: {ex.Message}", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
UpdateStatusStrip(string.Empty);
}
ToogleControls(enabled: true);
}
