Setup solution

ModernKeePassLib/Cryptography/KeyDerivation/KdfPool.cs

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+/*
+  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.Diagnostics;
+using System.Text;
+
+using ModernKeePassLib.Utility;
+
+namespace ModernKeePassLib.Cryptography.KeyDerivation
+{
+	public static class KdfPool
+	{
+		private static List<KdfEngine> g_l = new List<KdfEngine>();
+
+		public static IEnumerable<KdfEngine> Engines
+		{
+			get
+			{
+				EnsureInitialized();
+				return g_l;
+			}
+		}
+
+		private static void EnsureInitialized()
+		{
+			if(g_l.Count > 0) return;
+
+			g_l.Add(new AesKdf());
+			g_l.Add(new Argon2Kdf());
+		}
+
+		internal static KdfParameters GetDefaultParameters()
+		{
+			EnsureInitialized();
+			return g_l[0].GetDefaultParameters();
+		}
+
+		public static KdfEngine Get(PwUuid pu)
+		{
+			if(pu == null) { Debug.Assert(false); return null; }
+
+			EnsureInitialized();
+
+			foreach(KdfEngine kdf in g_l)
+			{
+				if(pu.Equals(kdf.Uuid)) return kdf;
+			}
+
+			return null;
+		}
+
+		public static KdfEngine Get(string strName)
+		{
+			if(string.IsNullOrEmpty(strName)) { Debug.Assert(false); return null; }
+
+			EnsureInitialized();
+
+			foreach(KdfEngine kdf in g_l)
+			{
+				if(strName.Equals(kdf.Name, StrUtil.CaseIgnoreCmp)) return kdf;
+			}
+
+			return null;
+		}
+
+		public static void Add(KdfEngine kdf)
+		{
+			if(kdf == null) { Debug.Assert(false); return; }
+
+			EnsureInitialized();
+
+			if(Get(kdf.Uuid) != null) { Debug.Assert(false); return; }
+			if(Get(kdf.Name) != null) { Debug.Assert(false); return; }
+
+			g_l.Add(kdf);
+		}
+	}
+}