66 lines
1.9 KiB
C#
66 lines
1.9 KiB
C#
/*
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KeePass Password Safe - The Open-Source Password Manager
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Copyright (C) 2003-2017 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.Collections.Generic;
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using System.Text;
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using System.Diagnostics;
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using KeePassLib.Security;
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using KeePassLib.Utility;
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namespace KeePassLib.Cryptography.PasswordGenerator
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{
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internal static class CharSetBasedGenerator
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{
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internal static PwgError Generate(out ProtectedString psOut,
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PwProfile pwProfile, CryptoRandomStream crsRandomSource)
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{
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psOut = ProtectedString.Empty;
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if(pwProfile.Length == 0) return PwgError.Success;
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PwCharSet pcs = new PwCharSet(pwProfile.CharSet.ToString());
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char[] vGenerated = new char[pwProfile.Length];
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PwGenerator.PrepareCharSet(pcs, pwProfile);
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for(int nIndex = 0; nIndex < (int)pwProfile.Length; ++nIndex)
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{
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char ch = PwGenerator.GenerateCharacter(pwProfile, pcs,
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crsRandomSource);
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if(ch == char.MinValue)
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{
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MemUtil.ZeroArray<char>(vGenerated);
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return PwgError.TooFewCharacters;
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}
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vGenerated[nIndex] = ch;
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}
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byte[] pbUtf8 = StrUtil.Utf8.GetBytes(vGenerated);
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psOut = new ProtectedString(true, pbUtf8);
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MemUtil.ZeroByteArray(pbUtf8);
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MemUtil.ZeroArray<char>(vGenerated);
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return PwgError.Success;
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}
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}
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}
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