mirror of
https://github.com/wismna/ModernKeePassLib.git
synced 2025-10-03 15:40:20 -04:00
117 lines
3.1 KiB
C#
117 lines
3.1 KiB
C#
/*
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KeePass Password Safe - The Open-Source Password Manager
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Copyright (C) 2003-2020 Dominik Reichl <dominik.reichl@t-online.de>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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using System;
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using System.Diagnostics;
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using System.Text;
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using ModernKeePassLib.Cryptography;
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using ModernKeePassLib.Security;
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using ModernKeePassLib.Utility;
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namespace ModernKeePassLib.Keys
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{
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/// <summary>
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/// Master password/passphrase as provided by the user.
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/// </summary>
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public sealed class KcpPassword : IUserKey
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{
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private ProtectedString m_psPassword = null; // Optional
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private ProtectedBinary m_pbKeyData;
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/// <summary>
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/// Get the password as protected string. This is <c>null</c>
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/// unless remembering the password has been turned on.
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/// </summary>
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public ProtectedString Password
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{
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get { return m_psPassword; }
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}
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/// <summary>
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/// Get key data. Querying this property is fast (it returns a
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/// reference to a cached <c>ProtectedBinary</c> object).
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/// If no key data is available, <c>null</c> is returned.
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/// </summary>
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public ProtectedBinary KeyData
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{
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get { return m_pbKeyData; }
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}
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public KcpPassword(byte[] pbPasswordUtf8)
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{
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SetKey(pbPasswordUtf8, true);
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}
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public KcpPassword(byte[] pbPasswordUtf8, bool bRememberPassword)
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{
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SetKey(pbPasswordUtf8, bRememberPassword);
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}
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public KcpPassword(string strPassword)
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{
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byte[] pb = StrUtil.Utf8.GetBytes(strPassword);
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try { SetKey(pb, true); }
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finally { MemUtil.ZeroByteArray(pb); }
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}
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private void SetKey(byte[] pbPasswordUtf8, bool bRememberPassword)
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{
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Debug.Assert(pbPasswordUtf8 != null);
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if(pbPasswordUtf8 == null) throw new ArgumentNullException("pbPasswordUtf8");
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#if (DEBUG && !KeePassLibSD)
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Debug.Assert(ValidatePassword(pbPasswordUtf8));
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#endif
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byte[] pbRaw = CryptoUtil.HashSha256(pbPasswordUtf8);
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try { m_pbKeyData = new ProtectedBinary(true, pbRaw); }
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finally { MemUtil.ZeroByteArray(pbRaw); }
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if(bRememberPassword)
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m_psPassword = new ProtectedString(true, pbPasswordUtf8);
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}
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// public void Clear()
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// {
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// m_psPassword = null;
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// m_pbKeyData = null;
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// }
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#if (DEBUG && !KeePassLibSD)
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private static bool ValidatePassword(byte[] pb)
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{
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try
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{
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#if ModernKeePassLib
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// TODO: find a way to implement this
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return true;
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#else
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string str = StrUtil.Utf8.GetString(pb);
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return str.IsNormalized(NormalizationForm.FormC);
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#endif
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}
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catch(Exception) { Debug.Assert(false); }
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return false;
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}
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#endif
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}
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}
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