implemented passwort encryption for new entries and decryption to show the password

Project.Controller/AppController.cs

@@ -22,9 +22,9 @@ public partial class AppController
     //save new entry - hashes the password and gives it to persistence
     public static void NewEntrySave(string name, string mailusername, string url, string password, string note)
     {
-        string hashedPassword = ShaHash.HashPassword(password);
+        string encrptedPassword = Crypto.EncryptPassword(password);
         string ownerUsername = _currentUser;
-        SQLite.SaveEntry(name, hashedPassword, mailusername, url, note, ownerUsername);
+        SQLite.SaveEntry(name, encrptedPassword, mailusername, url, note, ownerUsername);
         //string name, string pass, string mailUsername, url, string? note, string ownerUsername
     }
 

Project.Persistence/Crypto.cs

@@ -0,0 +1,68 @@
+using System.Security.Cryptography;
+using System.Text;
+namespace Project.Persistence;
+
+public class Crypto
+{
+    private static readonly string _key = "myKeyIsSecureAsFuck"; 
+    
+    public static string EncryptPassword(string password)
+    {
+        using (Aes aes = Aes.Create())
+        {
+            byte[] key = DeriveKey(_key);
+            aes.Key = key;
+            aes.GenerateIV(); // generate new IV
+            
+            ICryptoTransform encryptor = aes.CreateEncryptor();
+            
+            using (MemoryStream msEncrypt = new MemoryStream())
+            {
+                // save IV
+                msEncrypt.Write(aes.IV, 0, aes.IV.Length);
+                
+                using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
+                using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
+                {
+                    swEncrypt.Write(password);
+                }
+                
+                return Convert.ToBase64String(msEncrypt.ToArray());
+            }
+        }
+    }
+    
+    public static string DecryptPassword(string encryptedPassword)
+    {
+        byte[] fullCipher = Convert.FromBase64String(encryptedPassword);
+        
+        using (Aes aes = Aes.Create())
+        {
+            byte[] key = DeriveKey(_key);
+            aes.Key = key;
+            
+            // extract IV from encryption
+            byte[] iv = new byte[aes.BlockSize / 8];
+            Array.Copy(fullCipher, 0, iv, 0, iv.Length);
+            aes.IV = iv;
+            
+            ICryptoTransform decryptor = aes.CreateDecryptor();
+            
+            using (MemoryStream msDecrypt = new MemoryStream(fullCipher, iv.Length, fullCipher.Length - iv.Length))
+            using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
+            using (StreamReader srDecrypt = new StreamReader(csDecrypt))
+            {
+                return srDecrypt.ReadToEnd();
+            }
+        }
+    }
+    
+    private static byte[] DeriveKey(string key)
+    {
+        // 256 bits for AES-256
+        using (var deriveBytes = new Rfc2898DeriveBytes(key, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 }, 1000))
+        {
+            return deriveBytes.GetBytes(32); 
+        }
+    }
+}

Project.View/MenuView/MenuView.axaml

@@ -25,7 +25,7 @@
             VerticalAlignment="Bottom" />
 
         <Border Background="RosyBrown" Grid.Column="1">
-            <StackPanel Orientation="Horizontal">
+            <StackPanel Orientation="Horizontal" x:Name="ShowEntryDetails">
 
                 <StackPanel Margin="20,20,100,20" Orientation="Vertical">
                     <TextBlock

Project.View/MenuView/MenuView.axaml.cs

@@ -3,6 +3,7 @@ using Avalonia.Controls;
 using Avalonia.Interactivity;
 using Avalonia.Media;
 using Project.Controller;
+using Project.Model;
 using Project.Persistence;
 
 namespace Project.View;
@@ -46,15 +47,51 @@ public partial class MenuView : Window
                 Padding = new Thickness(10),
                 Width = 200
             };
-            // Add click handler for the button
+            // add click handler for the button
-            //button.Click += (sender, args) => ShowEntryDetails(entry);
+            button.Click += (object? sender, Avalonia.Interactivity.RoutedEventArgs e) => EntryDetails(entry);
             // Add the button to your container
             entriesContainer.Children.Add(button);
         }
     }
+    //refreshing the buttons when saving a new entry
     public void AfterSavingNewEntry()
     {
-        CreateEntryButtons();  // Refresh the buttons
+        CreateEntryButtons();
     }
 
+    public void EntryDetails(SavedEntries entry)
+    {
+        ShowEntryDetails.Children.Clear();
+        
+        ShowEntryDetails.Children.Add(new TextBlock 
+        { 
+            Text = $"Name: {entry.Name}",
+            Margin = new Thickness(0, 0, 0, 5)
+        });
+        ShowEntryDetails.Children.Add(new TextBlock 
+        { 
+            Text = $"Email/Username: {entry.MailUsername}",
+            Margin = new Thickness(0, 0, 0, 5)
+        });
+        ShowEntryDetails.Children.Add(new TextBlock 
+        { 
+            Text = $"URL: {entry.Url}",
+            Margin = new Thickness(0, 0, 0, 5)
+        });
+        ShowEntryDetails.Children.Add(new TextBlock 
+        { 
+            Text = $"Password: {Crypto.DecryptPassword(entry.Pass)}",
+            Margin = new Thickness(0, 0, 0, 5)
+        });
+
+        if (!string.IsNullOrEmpty(entry.Note))
+        {
+            ShowEntryDetails.Children.Add(new TextBlock
+                {
+                    Text = $"Note: {entry.Note}",
+                    Margin = new Thickness(0, 0, 0, 5)
+                });
+        }
+        
+    }
 }