merge reactive username with encode

PolyChat/Controller.cs

@@ -8,9 +8,11 @@ using PolyChat.Models;
 using System.IO;
 using System.Threading;
 using System;
-using System.Text.Json;
 using System.Text;
 using System.Security.Cryptography;
+using Windows.Security.Cryptography.Core;
+using Windows.Security.Cryptography;
+using Windows.Storage.Streams;
 
 namespace PolyChat
 {
@@ -37,8 +39,8 @@ namespace PolyChat
         {
             UIController = uiController;
             OwnIP = getIP();
-            //loadChats();
+            loadChats();
-            //SaveChats("10", "{das ist ein test}");
+            encode("test");
             Serve();
 
             // test
@@ -79,6 +81,7 @@ namespace PolyChat
                 {
                     Debug.WriteLine("--- initial packet received ---");
                     string ForeignIp = data[0].ToString();
+
                     Debug.WriteLine($"--- this ip was in the inital packet: {ForeignIp} ---");
                     if (isInConnections(ForeignIp))
                     {
@@ -174,10 +177,13 @@ namespace PolyChat
 
         /// <summary>
         /// sends chatlogs as json array to uiController wit corrosponding ip
+        /// 
+        /// in ui when chat is clicked connection gets established
         /// </summary>
         /// <param name="ip"></param>
         public void loadChats()
         {
+            //TODO: also load chatlogs when user tries to connect
             //load dir and create if non existant
             if (Directory.Exists("U:\\PolyChat\\Saves"))
             {
@@ -206,7 +212,6 @@ namespace PolyChat
                     UIController.OnIncomingMessages(ip, jsonArr);
                 }
             }
-
         }
 
         /// <summary>
@@ -221,6 +226,14 @@ namespace PolyChat
             //writing flag setzen oder auch in der datei selbst ne flag setzen
             new Thread(() =>
             {
+                //breaking if namechange
+                JObject obj = JObject.Parse(json);
+                if (!obj["type"].ToString().Equals("username"))
+                {
+                    //adding timestamp
+                    obj = JObject.Parse(json);
+                    obj.Add(new JProperty("timestamp", timeStamp));
+                    json = obj.ToString();
                     if (File.Exists($"U:\\PolyChat\\Saves\\{ip}.txt"))
                     {
                         Debug.WriteLine("--File allready exists--");
@@ -231,7 +244,6 @@ namespace PolyChat
                         {
                             Debug.WriteLine("--adding new chatmessage--");
                             //structure intact
-                        JObject obj = JObject.Parse(json);
                             //save new chat
                             String saved = output.Substring(0, output.Length - 1);
                             output = saved + ", " + json + " ]";
@@ -254,20 +266,15 @@ namespace PolyChat
                         //setup file
                         File.WriteAllText($"U:\\PolyChat\\Saves\\{ip}.txt", $"[ {json} ]");
                     }
+                }
             }).Start();
         }
 
         private void encode(string json)
         {
-            byte[] plaintext = Encoding.UTF8.GetBytes(json);
+            String ecryptetText = FileManager.encrypt(json);
-            byte[] entropy = new byte[20];
+            Debug.WriteLine(ecryptetText);
-            using (RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider())
+            //Debug.WriteLine(FileManager.decrypt(ecryptetText));
-            {
-                rng.GetBytes(entropy);
-            }
-
-            /*byte[] ciphertext = ProtectedData.Protect(plaintext, entropy,
-                DataProtectionScope.CurrentUser);*/
         }
     }
 }

PolyChat/MainPage.xaml.cs

@@ -7,11 +7,11 @@ using System.Collections.ObjectModel;
 using System.Diagnostics;
 using System.Linq;
 using System.Text.Json;
-using System.Threading.Tasks;
+using Windows.Foundation;
 using Windows.UI.Core;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
-using Windows.UI.Xaml.Data;
+using Windows.UI.Xaml.Media;
 
 // The Blank Page item template is documented at https://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409
 
@@ -90,7 +90,7 @@ namespace PolyChat
                 DateTime.Now
              );
             NewChatDialog dialog = new NewChatDialog();
-            var result = await dialog.ShowAsync();
+            var result = await SafelyOpenDialog(dialog);
             if (result == ContentDialogResult.Primary)
             {
                 string ip = IP.GetIPFromCode(dialog.getValue());
@@ -106,7 +106,7 @@ namespace PolyChat
         public async void OnOpenEditUsernameDialog(object sender = null, RoutedEventArgs e = null)
         {
             EditUsernameDialog dialog = new EditUsernameDialog(username);
-            var result = await dialog.ShowAsync();
+            var result = await SafelyOpenDialog(dialog);
             if (result == ContentDialogResult.Primary)
             {
                 username = dialog.getValue();
@@ -216,6 +216,27 @@ namespace PolyChat
             }
         }
 
+        public static IAsyncOperation<ContentDialogResult> SafelyOpenDialog(Dialog d)
+        {
+            if(VisualTreeHelper.GetOpenPopups(Window.Current).Count == 0)
+                return d.ShowAsync();
+            return null;
+        }
+
+        public static IAsyncOperation<ContentDialogResult> SafelyOpenDialog(NewChatDialog d)
+        {
+            if (VisualTreeHelper.GetOpenPopups(Window.Current).Count == 0)
+                return d.ShowAsync();
+            return null;
+        }
+
+        public static IAsyncOperation<ContentDialogResult> SafelyOpenDialog(EditUsernameDialog d)
+        {
+            if (VisualTreeHelper.GetOpenPopups(Window.Current).Count == 0)
+                return d.ShowAsync();
+            return null;
+        }
+
         // UPDATE FUNCTIONS FOR UI PLACEHOLDERS
 
         private void updateNoChatsPlaceholder()

PolyChat/Models/ChatMessage.cs

@@ -12,11 +12,6 @@ namespace PolyChat.Models
         public DateTime TimeStamp;
         public readonly bool Foreign;
 
-
-        public ChatMessage()
-        {
-
-        }
         /// <summary>
         /// Create own Message (directly sent)
         /// </summary>

PolyChat/Models/FileManager.cs

@@ -0,0 +1,84 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.IO;
+using System.Security.Cryptography;
+
+
+namespace PolyChat.Models
+{
+    class FileManager
+    {
+        public static String encrypt(String toEncrypt)
+        {
+            try {
+                string textToEncrypt = toEncrypt;
+                string ToReturn = "";
+                string publickey = "santhosh";
+                string secretkey = "engineer";
+                byte[] secretkeyByte = { };
+                secretkeyByte = System.Text.Encoding.UTF8.GetBytes(secretkey);
+                byte[] publickeybyte = { };
+                publickeybyte = System.Text.Encoding.UTF8.GetBytes(publickey);
+                MemoryStream ms = null;
+                CryptoStream cs = null;
+                byte[] inputbyteArray = System.Text.Encoding.UTF8.GetBytes(textToEncrypt);
+                using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
+                {
+                    ms = new MemoryStream();
+                    cs = new CryptoStream(ms, des.CreateEncryptor(publickeybyte, secretkeyByte), CryptoStreamMode.Write);
+                    cs.Write(inputbyteArray, 0, inputbyteArray.Length);
+                    cs.FlushFinalBlock();
+                    ToReturn = Convert.ToBase64String(ms.ToArray());
+                }
+                return ToReturn;
+            } catch (Exception ex)
+            {
+                throw new Exception(ex.Message, ex.InnerException);
+            }
+
+        }
+
+
+        public static String decrypt(String toDecrypt)
+        {
+            try
+            {
+                string textToDecrypt = toDecrypt;
+                string ToReturn = "";
+                string publickey = "santhosh";
+                string privatekey = "engineer";
+                byte[] privatekeyByte = { };
+                privatekeyByte = System.Text.Encoding.UTF8.GetBytes(privatekey);
+                byte[] publickeybyte = { };
+                publickeybyte = System.Text.Encoding.UTF8.GetBytes(publickey);
+                MemoryStream ms = null;
+                CryptoStream cs = null;
+                byte[] inputbyteArray = new byte[textToDecrypt.Replace(" ", "+").Length];
+                inputbyteArray = Convert.FromBase64String(textToDecrypt.Replace(" ", "+"));
+                using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
+                {
+                    ms = new MemoryStream();
+                    cs = new CryptoStream(ms, des.CreateDecryptor(publickeybyte, privatekeyByte), CryptoStreamMode.Write);
+                    cs.Write(inputbyteArray, 0, inputbyteArray.Length);
+                    cs.FlushFinalBlock();
+                    Encoding encoding = Encoding.UTF8;
+                    ToReturn = encoding.GetString(ms.ToArray());
+                }
+                return ToReturn;
+            }
+            catch (Exception ae)
+            {
+                throw new Exception(ae.Message, ae.InnerException);
+            }
+        }
+    }
+
+
+
+
+
+
+}

PolyChat/PolyChat.csproj

@@ -137,6 +137,7 @@
     <Compile Include="Models\ChatPartner.cs" />
     <Compile Include="Models\Exceptions\MessageTimedOutException.cs" />
     <Compile Include="Models\Exceptions\ConnectionFailedException.cs" />
+    <Compile Include="Models\FileManager.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Util\IP.cs" />
     <Compile Include="Views\Dialog.xaml.cs">
@@ -203,9 +204,6 @@
       <Version>5.0.2</Version>
     </PackageReference>
   </ItemGroup>
-  <ItemGroup>
-    <None Include="PolyChat_TemporaryKey.pfx" />
-  </ItemGroup>
   <PropertyGroup Condition=" '$(VisualStudioVersion)' == '' or '$(VisualStudioVersion)' &lt; '14.0' ">
     <VisualStudioVersion>14.0</VisualStudioVersion>
   </PropertyGroup>

PolyChat/Views/Dialog.xaml.cs

@@ -3,6 +3,7 @@ using PolyChat.Util;
 using System;
 using System.Collections.ObjectModel;
 using System.Linq;
+using System.Threading;
 using Windows.Foundation;
 using Windows.UI.Core;
 using Windows.UI.Popups;
@@ -34,7 +35,7 @@ namespace PolyChat.Views
             Primary = primary.Action;
             Secondary = secondary.Action;
             // show
-            ShowDialogAsync();
+            MainPage.SafelyOpenDialog(this);
         }
 
         private void setType(string type, string message)