Feature

Author: Lamparter

src/Files.App/Strings/en-US/Resources.resw

@@ -4043,4 +4043,20 @@
     <value>Add to shelf</value>
     <comment>Tooltip that displays when dragging items to the Shelf Pane</comment>
   </data>
+  <data name="SelectAlgorithm" xml:space="preserve">
+    <value>Select algorithm</value>
+    <comment>Placeholder that displays in the hash properties combo box</comment>
+  </data>
+  <data name="EnterHashToCompare" xml:space="preserve">
+    <value>Enter a hash to compare</value>
+    <comment>Placeholder that appears in the compare hash text box</comment>
+  </data>
+  <data name="HashesMatch" xml:space="preserve">
+    <value>Hashes match!</value>
+    <comment>Appears when two compared hashes match</comment>
+  </data>
+  <data name="HashesDoNotMatch" xml:space="preserve">
+    <value>Hashes don't match</value>
+    <comment>Appears when two compared hashes don't match</comment>
+  </data>
 </root>

src/Files.App/ViewModels/Properties/HashesViewModel.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Files Community
+// Copyright (c) Files Community
 // Licensed under the MIT License.
 
 using Files.Shared.Helpers;
@@ -120,6 +120,17 @@ private void ToggleIsEnabled(string? algorithm)
 			}
 		}
 
+		public bool CompareHash(string algorithm, string hashToCompare)
+		{
+			var hashInfoItem = Hashes.FirstOrDefault(x => x.Algorithm == algorithm);
+			if (hashInfoItem == null || hashInfoItem.HashValue == null)
+			{
+				return false;
+			}
+
+			return hashInfoItem.HashValue.Equals(hashToCompare, StringComparison.OrdinalIgnoreCase);
+		}
+
 		public void Dispose()
 		{
 			_cancellationTokenSource.Cancel();

src/Files.App/Views/Properties/HashesPage.xaml

@@ -109,7 +109,6 @@
 										Text="SHA1" />
 									<ToggleMenuFlyoutItem
 										Click="ToggleMenuFlyoutItem_Click"
-										Command="{x:Bind HashesViewModel.ToggleIsEnabledCommand}"
 										CommandParameter="SHA256"
 										IsChecked="{x:Bind HashesViewModel.ShowHashes['SHA256']}"
 										Text="SHA256" />
@@ -201,5 +200,56 @@
 			</ListView>
 		</Grid>
 
+		<!--  Hash Comparison Section  -->
+		<Grid
+			x:Name="HashComparisonGrid"
+			Margin="12,0,12,12"
+			VerticalAlignment="Bottom"
+			Background="{ThemeResource CardBackgroundFillColorDefaultBrush}"
+			BorderBrush="{ThemeResource CardStrokeColorDefaultBrush}"
+			BorderThickness="1"
+			CornerRadius="4">
+			<Grid.RowDefinitions>
+				<RowDefinition Height="Auto" />
+				<RowDefinition Height="Auto" />
+			</Grid.RowDefinitions>
+			<Grid.ColumnDefinitions>
+				<ColumnDefinition Width="*" />
+				<ColumnDefinition Width="*" />
+				<ColumnDefinition Width="Auto" />
+			</Grid.ColumnDefinitions>
+
+			<!--  Algorithm Selection  -->
+			<ComboBox
+				x:Name="AlgorithmComboBox"
+				Grid.Row="0"
+				Grid.Column="0"
+				Margin="12"
+				DisplayMemberPath="Algorithm"
+				ItemsSource="{x:Bind HashesViewModel.Hashes}"
+				PlaceholderText="{helpers:ResourceString Name=SelectAlgorithm}"
+				SelectedValue="{x:Bind HashesViewModel.SelectedItem.Algorithm, Mode=TwoWay}"
+				SelectedValuePath="Algorithm"
+				SelectionChanged="AlgorithmComboBox_SelectionChanged" />
+
+			<!--  Hash Input  -->
+			<TextBox
+				x:Name="HashInputTextBox"
+				Grid.Row="0"
+				Grid.Column="1"
+				Margin="12"
+				PlaceholderText="{helpers:ResourceString Name=EnterHashToCompare}"
+				TextChanged="HashInputTextBox_TextChanged" />
+
+			<!--  Comparison Result  -->
+			<TextBlock
+				x:Name="ComparisonResultTextBlock"
+				Grid.Row="0"
+				Grid.Column="2"
+				Margin="12"
+				VerticalAlignment="Center"
+				Style="{StaticResource App.Theme.BodyTextBlockStyle}" />
+		</Grid>
 	</Grid>
 </vm:BasePropertiesPage>
+

src/Files.App/Views/Properties/HashesPage.xaml.cs

@@ -46,6 +46,24 @@ private void ToggleMenuFlyoutItem_Click(object sender, RoutedEventArgs e)
 			_cancel = true;
 		}
 
+		private void HashInputTextBox_TextChanged(object sender, TextChangedEventArgs e)
+			=> CompareHashes();
+
+		private void AlgorithmComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
+			=> CompareHashes();
+
+		private void CompareHashes()
+		{
+			var selectedAlgorithm = AlgorithmComboBox.SelectedValue as string;
+			var hashToCompare = HashInputTextBox.Text;
+
+			if (string.IsNullOrEmpty(selectedAlgorithm) || string.IsNullOrEmpty(hashToCompare))
+				return;
+
+			var result = HashesViewModel.CompareHash(selectedAlgorithm, hashToCompare);
+			ComparisonResultTextBlock.Text = result ? Strings.HashesMatch.GetLocalizedResource() : Strings.HashesDoNotMatch.GetLocalizedResource();
+		}
+
 		private void MenuFlyout_Closing(FlyoutBase sender, FlyoutBaseClosingEventArgs e)
 		{
 			e.Cancel = _cancel;