using System;
using System.Reflection;
using System.Runtime.Remoting;
using System.Threading;

namespace Microsoft.Samples.AppUpdater
{
	public class AppKeys
	{
		private const string KEYFILENAME = "AppUpdaterKeys.dll";

		private AppDomain AD;

		private byte[][] KeyList;

		private string[] ExceptionList;

		private KeyValidator Validator;

		private string AppUrl;

		public AppKeys(string appUrl)
		{
			AppUrl = appUrl;
		}

		public void InitializeKeyCheck()
		{
			UnInitializeKeyCheck();
			AD = AppDomain.CreateDomain("KeyValidatorDomain");
			BindingFlags bindingAttr = BindingFlags.Instance | BindingFlags.Public | BindingFlags.CreateInstance;
			ObjectHandle objectHandle = AD.CreateInstance("AppUpdater", "Microsoft.Samples.AppUpdater.KeyValidator", ignoreCase: false, bindingAttr, null, null, null, null, null);
			object obj = objectHandle.Unwrap();
			Validator = (KeyValidator)obj;
			KeyList = GetKeyList(AppUrl.TrimEnd('/') + "/AppUpdaterKeys.dll");
		}

		public void UnInitializeKeyCheck()
		{
			if (AD != null)
			{
				AppDomain.Unload(AD);
				Thread.Sleep(TimeSpan.FromSeconds(2.0));
				AD = null;
			}
		}

		public bool ValidateAssembly(string assemblyLocation)
		{
			return Validator.Validate(assemblyLocation, KeyList, ExceptionList);
		}

		public byte[][] GetKeyList(string keyFileUrl)
		{
			byte[][] array = null;
			try
			{
				AssemblyName assemblyName = new AssemblyName();
				assemblyName.CodeBase = keyFileUrl;
				Assembly assembly = AD.Load(assemblyName);
				if (KeyValidator.CompareKeys(assembly.GetName().GetPublicKey(), new byte[1][]
				{
					Assembly.GetEntryAssembly().GetName().GetPublicKey()
				}))
				{
					Type type = assembly.GetType("Microsoft.Samples.AppUpdater.KeyList");
					array = (byte[][])type.GetField("Keys").GetValue(null);
					ExceptionList = (string[])type.GetField("ExceptionList").GetValue(null);
				}
			}
			catch (Exception)
			{
			}
			byte[][] array2 = null;
			if (array == null)
			{
				array2 = new byte[1][]
				{
					Assembly.GetEntryAssembly().GetName().GetPublicKey()
				};
			}
			else
			{
				array2 = new byte[array.Length + 1][];
				array2[0] = Assembly.GetEntryAssembly().GetName().GetPublicKey();
				array.CopyTo(array2, 1);
			}
			return array2;
		}
	}
}