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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.Generic;
using System.Text;
using KeePassLib.Serialization;
namespace KeePassLib.Keys
{
public sealed class KeyProviderQueryContext
{
private IOConnectionInfo m_ioInfo;
public IOConnectionInfo DatabaseIOInfo
{
get { return m_ioInfo; }
}
public string DatabasePath
{
get { return m_ioInfo.Path; }
}
private bool m_bCreatingNewKey;
public bool CreatingNewKey
{
get { return m_bCreatingNewKey; }
}
private bool m_bSecDesktop;
public bool IsOnSecureDesktop
{
get { return m_bSecDesktop; }
}
public KeyProviderQueryContext(IOConnectionInfo ioInfo, bool bCreatingNewKey,
bool bOnSecDesktop)
{
if(ioInfo == null) throw new ArgumentNullException("ioInfo");
m_ioInfo = ioInfo.CloneDeep();
m_bCreatingNewKey = bCreatingNewKey;
m_bSecDesktop = bOnSecDesktop;
}
}
public abstract class KeyProvider
{
/// <summary>
/// Name of your key provider (should be unique).
/// </summary>
public abstract string Name
{
get;
}
/// <summary>
/// Property indicating whether the provider is exclusive.
/// If the provider is exclusive, KeePass doesn't allow other
/// key sources (master password, Windows user account, ...)
/// to be combined with the provider.
/// Key providers typically should return <c>false</c>
/// (to allow non-exclusive use), i.e. don't override this
/// property.
/// </summary>
public virtual bool Exclusive
{
get { return false; }
}
/// <summary>
/// Property that specifies whether the returned key data
/// gets hashed by KeePass first or is written directly to
/// the user key data stream.
/// Standard key provider plugins should return <c>false</c>
/// (i.e. don't overwrite this property). Returning <c>true</c>
/// may cause severe security problems and is highly
/// discouraged.
/// </summary>
public virtual bool DirectKey
{
get { return false; }
}
// public virtual PwIcon ImageIndex
// {
// get { return PwIcon.UserKey; }
// }
/// <summary>
/// This property specifies whether the <c>GetKey</c> method might
/// show a form or dialog. If there is any chance that the method shows
/// one, this property must return <c>true</c>. Only if it's guaranteed
/// that the <c>GetKey</c> method doesn't show any form or dialog, this
/// property should return <c>false</c>.
/// </summary>
public virtual bool GetKeyMightShowGui
{
get { return true; }
}
/// <summary>
/// This property specifies whether the key provider is compatible
/// with the secure desktop mode. This almost never is the case,
/// so you usually won't override this property.
/// </summary>
public virtual bool SecureDesktopCompatible
{
get { return false; }
}
public abstract byte[] GetKey(KeyProviderQueryContext ctx);
}
#if DEBUG
public sealed class SampleKeyProvider : KeyProvider
{
public override string Name
{
get { return "Built-In Sample Key Provider"; }
}
// Do not just copy this to your own key provider class! See above.
public override bool GetKeyMightShowGui
{
get { return false; }
}
public override byte[] GetKey(KeyProviderQueryContext ctx)
{
return new byte[]{ 2, 3, 5, 7, 11, 13 };
}
}
#endif
}
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