Setup solution

ModernKeePassLib/Keys/KeyValidator.cs

@@ -0,0 +1,51 @@
+/*
+  KeePass Password Safe - The Open-Source Password Manager
+  Copyright (C) 2003-2019 Dominik Reichl <dominik.reichl@t-online.de>
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace ModernKeePassLib.Keys
+{
+	public enum KeyValidationType
+	{
+		MasterPassword = 0
+	}
+
+	public abstract class KeyValidator
+	{
+		/// <summary>
+		/// Name of your key validator (should be unique).
+		/// </summary>
+		public abstract string Name
+		{
+			get;
+		}
+
+		/// <summary>
+		/// Validate a key.
+		/// </summary>
+		/// <param name="strKey">Key to validate.</param>
+		/// <param name="t">Type of the validation to perform.</param>
+		/// <returns>Returns <c>null</c>, if the validation is successful.
+		/// If there's a problem with the key, the returned string describes
+		/// the problem.</returns>
+		public abstract string Validate(string strKey, KeyValidationType t);
+	}
+}