src/App.xaml.cs

   1 using System;
   2 using System.Runtime.CompilerServices;
   3 using System.Runtime.InteropServices;
   4 using System.Security;
   5 using System.Windows;
   6 using System.Windows.Interop;
   7 using System.Windows.Media;
   8 using Org.BouncyCastle.Asn1;
   9
  10 namespace CertViewer
  11 {
  12     public partial class App : Application
  13     {
  14         private static class Const
  15         {
  16             internal static readonly string MAX_KEY_SIZE = (1U << 16).ToString();
  17         }
  18
  19         public App()
  20         {
  21             AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(ExceptionHandler);
  22         }
  23
  24         protected override void OnStartup(StartupEventArgs e)
  25         {
  26             const string BOUNCY = "Org.BouncyCastle.";
  27             try
  28             {
  29                 Environment.SetEnvironmentVariable(BOUNCY + "EC.Fp_MaxSize", Const.MAX_KEY_SIZE);
  30                 Environment.SetEnvironmentVariable(BOUNCY + "Rsa.MaxSize", Const.MAX_KEY_SIZE);
  31                 Environment.SetEnvironmentVariable(BOUNCY + "Asn1.AllowUnsafeInteger", string.Empty);
  32                 Environment.SetEnvironmentVariable(BOUNCY + "EC.Fp_Certainty", string.Empty);
  33                 Environment.SetEnvironmentVariable(BOUNCY + "Fpe.Disable", string.Empty);
  34                 Environment.SetEnvironmentVariable(BOUNCY + "Fpe.Disable_Ff1", string.Empty);
  35                 Environment.SetEnvironmentVariable(BOUNCY + "Pkcs1.Strict", string.Empty);
  36                 Environment.SetEnvironmentVariable(BOUNCY + "Pkcs12.IgnoreUselessPassword", string.Empty);
  37                 Environment.SetEnvironmentVariable(BOUNCY + "X509.Allow_Non-DER_TBSCert", string.Empty);
  38             }
  39             catch { }
  40             try
  41             {
  42                 if (Array.Exists(e.Args, str => StrCaseCmp(str, "--render-mode=software")) || StrCaseCmp(Environment.GetEnvironmentVariable("CertViewer.RenderMode"), "software"))
  43                 {
  44                     RenderOptions.ProcessRenderMode = RenderMode.SoftwareOnly;
  45                 }
  46             }
  47             catch { }
  48             Require(typeof(Asn1Encodable));
  49         }
  50
  51         private static void ExceptionHandler(object sender, UnhandledExceptionEventArgs args)
  52         {
  53             try
  54             {
  55                 if (args.ExceptionObject is Exception exception)
  56                 {
  57                     FatalAppExit(0, $"{exception.GetType().Name}: {exception.Message}");
  58                 }
  59             }
  60             catch { }
  61             Environment.Exit(-1);
  62         }
  63
  64         private static bool StrCaseCmp(string s1, string s2)
  65         {
  66             if ((!ReferenceEquals(s1, null)) && (!ReferenceEquals(s2, null)))
  67             {
  68                 return string.Equals(s1.Trim(), s2.Trim(), StringComparison.OrdinalIgnoreCase);
  69             }
  70             return false;
  71         }
  72
  73         [MethodImpl(MethodImplOptions.NoInlining)]
  74         private static void Require(Type _) { }
  75
  76         [DllImport("kernel32.dll", ExactSpelling=true, CharSet=CharSet.Unicode, EntryPoint="FatalAppExitW")]
  77         [SuppressUnmanagedCodeSecurity]
  78         private static extern void FatalAppExit(uint reserved, string message);
  79     }
  80 }