KeePassLib finally portable (but version 2.19)

Windows Store project stub

ModernKeePassLib/Cryptography/SHA256Managed.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Windows.Security.Cryptography;
+using Windows.Security.Cryptography.Core;
+using Windows.Storage.Streams;
+
+namespace ModernKeePassLib.Cryptography
+{
+    // Singleton adaptor that provides a part of the .net SHA256Managed class
+
+    class SHA256Managed
+    {
+        private static SHA256Managed instance;
+        private static HashAlgorithmProvider m_AlgProv;
+
+        private SHA256Managed() 
+        {
+            String strAlgName = "SHA256";
+            m_AlgProv = HashAlgorithmProvider.OpenAlgorithm(strAlgName);
+            m_AlgProv.CreateHash();
+        }
+
+        public static SHA256Managed Instance
+        {
+            get
+            {
+                if (instance == null)
+                {
+                    instance = new SHA256Managed();
+                }
+                return instance;
+            }
+        }
+
+        public byte[] ComputeHash(byte[] buffer )
+        {
+            IBuffer input = CryptographicBuffer.CreateFromByteArray( buffer);
+            IBuffer hashBuffer = m_AlgProv.HashData(input);
+            byte[] hash;
+            CryptographicBuffer.CopyToByteArray(hashBuffer, out hash);
+            return hash;
+        }
+
+    }
+}