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/*
KeePass Password Safe - The Open-Source Password Manager
Copyright (C) 2003-2012 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;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
namespace KeePassLib.Keys
{
public sealed class KeyProviderPool : IEnumerable<KeyProvider>
{
private List<KeyProvider> m_vProviders = new List<KeyProvider>();
public int Count
{
get { return m_vProviders.Count; }
}
IEnumerator IEnumerable.GetEnumerator()
{
return m_vProviders.GetEnumerator();
}
public IEnumerator<KeyProvider> GetEnumerator()
{
return m_vProviders.GetEnumerator();
}
public void Add(KeyProvider prov)
{
Debug.Assert(prov != null); if(prov == null) throw new ArgumentNullException("prov");
m_vProviders.Add(prov);
}
public bool Remove(KeyProvider prov)
{
Debug.Assert(prov != null); if(prov == null) throw new ArgumentNullException("prov");
return m_vProviders.Remove(prov);
}
public KeyProvider Get(string strProviderName)
{
if(strProviderName == null) throw new ArgumentNullException("strProviderName");
foreach(KeyProvider prov in m_vProviders)
{
if(prov.Name == strProviderName) return prov;
}
return null;
}
public bool IsKeyProvider(string strName)
{
Debug.Assert(strName != null); if(strName == null) throw new ArgumentNullException("strName");
foreach(KeyProvider prov in m_vProviders)
{
if(prov.Name == strName) return true;
}
return false;
}
internal byte[] GetKey(string strProviderName, KeyProviderQueryContext ctx,
out bool bPerformHash)
{
Debug.Assert(strProviderName != null); if(strProviderName == null) throw new ArgumentNullException("strProviderName");
bPerformHash = true;
foreach(KeyProvider prov in m_vProviders)
{
if(prov.Name == strProviderName)
{
bPerformHash = !prov.DirectKey;
return prov.GetKey(ctx);
}
}
Debug.Assert(false);
return null;
}
}
}
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