/*	Authnet verifies signature of Authenticode-signed files
	Requires CAPICOM 2 COM interop assembly with namespace "CAPICOM"
				Copyright  M. Gallant  02/18/2003  */

using System;
using System.IO;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Collections;
using CAPICOM;

public class authnet {
 static String title = "AuthNet";

   public static void Main(){ 
	DialogResult result;
	Certificates oCerts;
	SignedCodeClass oSigCode;

	String[] args = Environment.GetCommandLineArgs();
	   if(args.Length<2)
	   {
		   MessageBox.Show("Usage:\nauthnet.exe <filename>", title,
				MessageBoxButtons.OK, MessageBoxIcon.Information);
		   return;
	   }
	String fname = args[1];
	if (!File.Exists(fname)){
	MessageBox.Show("File '" + fname + "' not found ", title
	,MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
	 return;
	}

	oSigCode = new SignedCodeClass() ;
	oSigCode.FileName = fname;
	try{
	 oSigCode.Verify(false) ;
	  result = MessageBox.Show("Authenticode signature VERIFIED on file:\n" + fname + 
	  "  \n\nDisplay certificates? ", title ,MessageBoxButtons.YesNo, MessageBoxIcon.Information);
	  oCerts = oSigCode.Certificates ;
	  if(result == DialogResult.Yes)
		  ShowAllCerts(oCerts);
	 }
	catch(COMException) {
	  MessageBox.Show("NO VALID SIGNATURE on file:\n" + fname + "  ", title
	  ,MessageBoxButtons.OK, MessageBoxIcon.Error);
	}

   }

 private static void ShowAllCerts(Certificates oCerts) {
	Certificate oCert;
	IEnumerator _enum = (IEnumerator)oCerts.GetEnumerator();
	int i = 0;
	while (_enum.MoveNext() == true)
		{
		 oCert  = (Certificate) _enum.Current;
		 oCert.Display();
		 i++;
		}	
 }

}