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/*
KeePass Password Safe - The Open-Source Password Manager
Copyright (C) 2003-2017 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 KeePass.Resources;
#if !KeePassUAP
using KeePass.Util.Spr;
#endif
using KeePassLib;
using KeePassLib.Cryptography.PasswordGenerator;
using KeePassLib.Security;
using KeePassLib.Utility;
namespace KeePass.Util
{
public static class PwGeneratorUtil
{
private static string m_strBuiltInSuffix = null;
internal static string BuiltInSuffix
{
get
{
if(m_strBuiltInSuffix == null)
m_strBuiltInSuffix = " (" + KPRes.BuiltIn + ")";
return m_strBuiltInSuffix;
}
}
private static List<PwProfile> m_lBuiltIn = null;
public static List<PwProfile> BuiltInProfiles
{
get
{
if(m_lBuiltIn == null) AllocStandardProfiles();
return m_lBuiltIn;
}
}
private static void AllocStandardProfiles()
{
m_lBuiltIn = new List<PwProfile>();
AddStdPattern(KPRes.RandomMacAddress, @"HH\-HH\-HH\-HH\-HH\-HH");
string strHex = KPRes.HexKeyEx;
AddStdPattern(strHex.Replace(@"{PARAM}", "40"), @"h{10}");
AddStdPattern(strHex.Replace(@"{PARAM}", "128"), @"h{32}");
AddStdPattern(strHex.Replace(@"{PARAM}", "256"), @"h{64}");
}
private static void AddStdPattern(string strName, string strPattern)
{
PwProfile p = new PwProfile();
p.Name = strName + PwGeneratorUtil.BuiltInSuffix;
p.CollectUserEntropy = false;
p.GeneratorType = PasswordGeneratorType.Pattern;
p.Pattern = strPattern;
m_lBuiltIn.Add(p);
}
/// <summary>
/// Get a list of all password generator profiles (built-in
/// and user-defined ones).
/// </summary>
public static List<PwProfile> GetAllProfiles(bool bSort)
{
List<PwProfile> lUser = Program.Config.PasswordGenerator.UserProfiles;
// Sort it in the configuration file
if(bSort) lUser.Sort(PwGeneratorUtil.CompareProfilesByName);
// Remove old built-in profiles by KeePass <= 2.17
for(int i = lUser.Count - 1; i >= 0; --i)
{
if(IsBuiltInProfile(lUser[i].Name)) lUser.RemoveAt(i);
}
List<PwProfile> l = new List<PwProfile>();
l.AddRange(PwGeneratorUtil.BuiltInProfiles);
l.AddRange(lUser);
if(bSort) l.Sort(PwGeneratorUtil.CompareProfilesByName);
return l;
}
public static bool IsBuiltInProfile(string strName)
{
if(strName == null) { Debug.Assert(false); return false; }
string strWithSuffix = strName + PwGeneratorUtil.BuiltInSuffix;
foreach(PwProfile p in PwGeneratorUtil.BuiltInProfiles)
{
if(p.Name.Equals(strName, StrUtil.CaseIgnoreCmp) ||
p.Name.Equals(strWithSuffix, StrUtil.CaseIgnoreCmp))
return true;
}
return false;
}
public static int CompareProfilesByName(PwProfile a, PwProfile b)
{
if(a == b) return 0;
if(a == null) { Debug.Assert(false); return -1; }
if(b == null) { Debug.Assert(false); return 1; }
return StrUtil.CompareNaturally(a.Name, b.Name);
}
#if !KeePassUAP
internal static ProtectedString GenerateAcceptable(PwProfile prf,
byte[] pbUserEntropy, PwEntry peOptCtx, PwDatabase pdOptCtx)
{
bool b = false;
return GenerateAcceptable(prf, pbUserEntropy, peOptCtx, pdOptCtx, ref b);
}
internal static ProtectedString GenerateAcceptable(PwProfile prf,
byte[] pbUserEntropy, PwEntry peOptCtx, PwDatabase pdOptCtx,
ref bool bAcceptAlways)
{
ProtectedString ps = ProtectedString.Empty;
SprContext ctx = new SprContext(peOptCtx, pdOptCtx,
SprCompileFlags.NonActive, false, false);
bool bAcceptable = false;
while(!bAcceptable)
{
bAcceptable = true;
PwGenerator.Generate(out ps, prf, pbUserEntropy, Program.PwGeneratorPool);
if(ps == null) { Debug.Assert(false); ps = ProtectedString.Empty; }
if(bAcceptAlways) { }
else
{
string str = ps.ReadString();
string strCmp = SprEngine.Compile(str, ctx);
if(str != strCmp)
{
if(prf.GeneratorType == PasswordGeneratorType.CharSet)
bAcceptable = false; // Silently try again
else
{
string strText = str + MessageService.NewParagraph +
KPRes.GenPwSprVariant + MessageService.NewParagraph +
KPRes.GenPwAccept;
if(!MessageService.AskYesNo(strText, null, false))
bAcceptable = false;
else bAcceptAlways = true;
}
}
}
}
return ps;
}
#endif
}
}
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