Address memory management in hashlib

src/HashLib4CSharp/HashLib4CSharp.csproj

@@ -28,4 +28,8 @@
       <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="6.0.0" />
     </ItemGroup>
 
+    <ItemGroup>
+      <ProjectReference Include="..\Hydrogen\Hydrogen.csproj" />
+    </ItemGroup>
+
 </Project>

src/HashLib4CSharp/src/Base/Hash.cs

@@ -14,10 +14,11 @@ This library was sponsored by Sphere 10 Software (https://www.sphere10.com)
 using System;
 using System.Diagnostics;
 using HashLib4CSharp.Interfaces;
+using Hydrogen;
 
 namespace HashLib4CSharp.Base
 {
-    internal abstract class Hash : IHash
+    internal abstract class Hash : SyncDisposable, IHash
     {
         private const string CloneNotYetImplemented = "Clone not yet implemented for '{0}'";
         private const string InvalidBufferSize = "'BufferSize' must be greater than zero";
@@ -55,5 +56,7 @@ public virtual IHash Clone() =>
 
         public abstract void Initialize();
         public abstract IHashResult TransformFinal();
-    }
+
+		protected override void FreeManagedResources() {}
+	}
 }

src/HashLib4CSharp/src/Base/MultipleTransformNonBlock.cs

@@ -30,12 +30,6 @@ protected MultipleTransformNonBlock(int hashSize, int blockSize) : base(hashSize
 
         private MemoryStream Buffer { get; }
 
-        ~MultipleTransformNonBlock()
-        {
-            Buffer?.Flush();
-            Buffer?.Close();
-        }
-
         private byte[] Aggregate()
         {
             var aggregate = new byte[0];
@@ -97,5 +91,11 @@ public override IHashResult TransformFinal()
             return result;
         }
         protected abstract IHashResult ComputeAggregatedBytes(byte[] data);
-    }
+
+		protected override void FreeManagedResources() 
+		{
+			Buffer?.Flush();
+			Buffer?.Close();
+		}
+	}
 }

src/HashLib4CSharp/src/Interfaces/IHash.cs

@@ -22,7 +22,7 @@ This library was sponsored by Sphere 10 Software (https://www.sphere10.com)
 
 namespace HashLib4CSharp.Interfaces
 {
-    public interface IHash
+    public interface IHash : IDisposable
     {
         string Name { get; }
         int BlockSize { get; }