private void CreateFirewall_Click(object sender, EventArgs e)
{
// Prompt the user...
DialogResult dialogresult = MessageBox.Show
(
this,
"Clicking 'Yes' creates an inbound firewall rule for the " +
"TwainDirect.Scanner program, so that TWAIN Local applications " +
"on other PCs can use your scanner." + Environment.NewLine +
Environment.NewLine +
"Would you like to continue?",
"Create Firewall Rule",
MessageBoxButtons.YesNo
);
// If yes, then do the refresh...
if (dialogresult == DialogResult.Yes)
{
// Issue the command...
string szFirewallBat = Path.Combine(Path.GetTempPath(), "twaindirectfirewall.bat");
File.WriteAllText
(
szFirewallBat,
"@echo off" + Environment.NewLine +
"netsh advfirewall firewall add rule name=TwainDirect.Scanner dir=in action=allow program=system enable=yes profile=any interfacetype=any protocol=tcp localport=" + m_szPort + " remoteport=any security=notrequired localip=any remoteip=any edge=yes"
);
ManageCertificates.RunBatchFile(szFirewallBat);
File.Delete(szFirewallBat);
// Update the form...
SuspendLayout();
UpdateFirewallInfoOnForm();
ResumeLayout();
}
}
/// <summary>
/// Constructor for our main form...
/// </summary>
public FormMain()
{
// Init the form...
InitializeComponent();
this.MinimizeBox = false;
this.MaximizeBox = false;
// Are we running in reduced mode?
string szTwainDirectApp = System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location);
szTwainDirectApp = Path.Combine(szTwainDirectApp, "TwainDirect.App.exe");
if (File.Exists(szTwainDirectApp))
{
m_groupboxSelfSignedCertificates.Enabled = false;
m_labelRoot.Enabled = false;
m_labelExchange.Enabled = false;
m_labelUrlAcl.Enabled = false;
m_richtextboxRoot.Enabled = false;
m_richtextboxExchange.Enabled = false;
m_richtextboxUrlAcl.Enabled = false;
m_buttonDeleteCertificates.Enabled = false;
m_buttonRefreshCertificates.Enabled = false;
m_groupboxFirewall.Enabled = false;
m_labelFirewall.Enabled = false;
m_richtextboxFirewall.Enabled = false;
m_buttonDeleteFirewall.Enabled = false;
m_buttonCreateFirewall.Enabled = false;
}
// Init other stuff...
m_szRootCertificateName = "TWAIN Direct Self-Signed Root Authority for " + Environment.MachineName; // Our root certificate
m_szExchangeCertificateName = Environment.MachineName + ".local"; // The exchange name for this PC
m_szTwainDirectScannerApp = "{aadc29dd-1d81-42f5-873d-5d89cf6e58ee}"; // TwainDirect.Scanner's GUID
m_szPort = "34034"; // The port we'll be using
// Init the certificate manager...
m_managecertificates = new ManageCertificates(m_szRootCertificateName, m_szExchangeCertificateName, m_szTwainDirectScannerApp, m_szPort);
// Update the form...
UpdateBonjourInfoOnForm();
UpdateCertificateInfoOnForm();
UpdateFirewallInfoOnForm();
}
/// <summary>
/// Update the firewall info displayed on the form...
/// </summary>
private void UpdateFirewallInfoOnForm()
{
string szNoAccess = "Other PCs on this local area network cannot access this PC's scanner. If you'd like to change that, click on the 'Create Firewall Rule' button.";
// Update the firewall info...
try
{
// Issue the command...
string szFirewallBat = Path.Combine(Path.GetTempPath(), "twaindirectfirewall.bat");
File.WriteAllText
(
szFirewallBat,
"@echo off" + Environment.NewLine +
"netsh advfirewall firewall show rule TwainDirect.Scanner"
);
string szOutput = ManageCertificates.RunBatchFile(szFirewallBat);
File.Delete(szFirewallBat);
// Tokenize...
List <string> listSzTwainDirect = new List <string>();
string[] aszLines = szOutput.Split(new string[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);
// We have no rules...
if (aszLines.Length <= 2)
{
m_richtextboxFirewall.Text = szNoAccess;
}
// Show what we have...
else
{
m_richtextboxFirewall.Text = "Other PCs on this local area network can access this PC's scanner.";
foreach (string szLine in aszLines)
{
m_richtextboxFirewall.Text += Environment.NewLine + szLine;
}
}
}
catch
{
m_richtextboxUrlAcl.Text = szNoAccess;
}
}
private void DeleteFirewall_Click(object sender, EventArgs e)
{
// Prompt the user...
DialogResult dialogresult = MessageBox.Show
(
this,
"Clicking 'Yes' deletes the inbound firewall rule for the " +
"TwainDirect.Scanner program, preventing TWAIN Local applications " +
"on other PCs from using your scanner. You will still be able " +
"to run TWAIN Local applications on this PC." + Environment.NewLine +
Environment.NewLine +
"Would you like to continue?",
"Delete Firewall Rule",
MessageBoxButtons.YesNo
);
// If yes, then do the refresh...
if (dialogresult == DialogResult.Yes)
{
// Issue the command...
string szFirewallBat = Path.Combine(Path.GetTempPath(), "twaindirectfirewall.bat");
File.WriteAllText
(
szFirewallBat,
"@echo off" + Environment.NewLine +
"netsh advfirewall firewall delete rule \"name=TwainDirect.Scanner\""
);
ManageCertificates.RunBatchFile(szFirewallBat);
File.Delete(szFirewallBat);
// Update the form...
SuspendLayout();
UpdateFirewallInfoOnForm();
ResumeLayout();
}
}
/// <summary>
/// Update the certificate info displayed on the form...
/// </summary>
private void UpdateCertificateInfoOnForm()
{
bool blSuccess;
DateTime datetimeNotBefore;
DateTime datetimeNotAfter;
// Show the root certificate, if any...
blSuccess = m_managecertificates.IsCertificateInstalled
(
StoreLocation.LocalMachine,
StoreName.Root,
m_szRootCertificateName,
m_szRootCertificateName,
out datetimeNotBefore,
out datetimeNotAfter
);
if (!blSuccess)
{
m_richtextboxRoot.Text = "(no data)";
}
else
{
m_richtextboxRoot.Text = m_szRootCertificateName + ", " + datetimeNotBefore.ToShortDateString() + " to " + datetimeNotAfter.ToShortDateString();
}
// Show the exchange certificate, if any...
blSuccess = m_managecertificates.IsCertificateInstalled
(
StoreLocation.LocalMachine,
StoreName.My,
m_szExchangeCertificateName,
m_szRootCertificateName,
out datetimeNotBefore,
out datetimeNotAfter
);
if (!blSuccess)
{
m_richtextboxExchange.Text = "(no data)";
}
else
{
m_richtextboxExchange.Text = m_szExchangeCertificateName + ", " + datetimeNotBefore.ToShortDateString() + " to " + datetimeNotAfter.ToShortDateString();
}
// Update the URCACL info...
try
{
m_richtextboxUrlAcl.Text = "(no data)";
// Issue the command...
string szUrlAclBat = Path.Combine(Path.GetTempPath(), "twaindirecturlacl.bat");
File.WriteAllText(szUrlAclBat, "netsh http show urlacl");
string szOutput = ManageCertificates.RunBatchFile(szUrlAclBat);
File.Delete(szUrlAclBat);
// Tokenize...
List <string> listSzTwainDirect = new List <string>();
string[] aszLines = szOutput.Split(new string[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);
// Find the TWAIN Direct entry, if any, we shouldn't find more
// than one, but let's be prepared for that possibility...
foreach (string szLine in aszLines)
{
if (szLine.ToLowerInvariant().Contains("/twaindirect/session/") && szLine.ToLowerInvariant().Contains("https"))
{
listSzTwainDirect.Add(szLine.Substring(szLine.IndexOf("https")));
}
}
// Show what we found...
m_richtextboxUrlAcl.Text = "";
foreach (string szTwainDirect in listSzTwainDirect)
{
int iIndex = szTwainDirect.IndexOf('/', 8);
if ((iIndex < 0) || ((iIndex + 1) >= szTwainDirect.Length))
{
continue;
}
string szPort = szTwainDirect.Remove(iIndex + 1).ToLowerInvariant();
foreach (string szLine in aszLines)
{
if (szLine.ToLowerInvariant().Contains(szPort))
{
if (!string.IsNullOrEmpty(m_richtextboxUrlAcl.Text))
{
m_richtextboxUrlAcl.Text += Environment.NewLine;
}
m_richtextboxUrlAcl.Text += szLine.ToLowerInvariant().Substring(szLine.IndexOf("https"));
}
}
}
// Ruh-roh...
if (string.IsNullOrEmpty(m_richtextboxUrlAcl.Text))
{
m_richtextboxUrlAcl.Text = "(no data)";
}
}
catch
{
m_richtextboxUrlAcl.Text = "(no data)";
}
}