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/*
KeePass Password Safe - The Open-Source Password Manager
Copyright (C) 2003-2021 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 System.Windows.Forms;
using KeePass.App;
using KeePass.Forms;
using KeePass.Resources;
using KeePass.UI;
using KeePassLib;
using KeePassLib.Keys;
using KeePassLib.Resources;
using KeePassLib.Security;
using KeePassLib.Serialization;
using KeePassLib.Utility;
namespace KeePass.Util
{
public static class KeyUtil
{
public static CompositeKey KeyFromCommandLine(CommandLineArgs args)
{
if(args == null) throw new ArgumentNullException("args");
CompositeKey cmpKey = new CompositeKey();
string strPassword = args[AppDefs.CommandLineOptions.Password];
string strPasswordEnc = args[AppDefs.CommandLineOptions.PasswordEncrypted];
string strPasswordStdIn = args[AppDefs.CommandLineOptions.PasswordStdIn];
string strKeyFile = args[AppDefs.CommandLineOptions.KeyFile];
string strUserAcc = args[AppDefs.CommandLineOptions.UserAccount];
Action<byte[]> fAddPwB = delegate(byte[] pbPw)
{
cmpKey.AddUserKey(new KcpPassword(pbPw,
Program.Config.Security.MasterPassword.RememberWhileOpen));
};
Action<string> fAddPwS = delegate(string strPw)
{
byte[] pb = StrUtil.Utf8.GetBytes(strPw);
try { fAddPwB(pb); }
finally { MemUtil.ZeroByteArray(pb); }
};
if(strPassword != null)
fAddPwS(strPassword);
else if(strPasswordEnc != null)
fAddPwS(StrUtil.DecryptString(strPasswordEnc));
else if(strPasswordStdIn != null)
{
ProtectedString ps = ReadPasswordStdIn(true);
if(ps != null)
{
byte[] pb = ps.ReadUtf8();
try { fAddPwB(pb); }
finally { MemUtil.ZeroByteArray(pb); }
}
}
if(strKeyFile != null)
{
if(Program.KeyProviderPool.IsKeyProvider(strKeyFile))
{
KeyProviderQueryContext ctxKP = new KeyProviderQueryContext(
IOConnectionInfo.FromPath(args.FileName), false, false);
bool bPerformHash;
byte[] pbProvKey = Program.KeyProviderPool.GetKey(strKeyFile, ctxKP,
out bPerformHash);
if((pbProvKey != null) && (pbProvKey.Length > 0))
{
try { cmpKey.AddUserKey(new KcpCustomKey(strKeyFile, pbProvKey, bPerformHash)); }
catch(Exception exCKP)
{
MessageService.ShowWarning(strKeyFile, exCKP);
return null;
}
finally { MemUtil.ZeroByteArray(pbProvKey); }
}
else return null; // Provider has shown error message
}
else // Key file
{
try { cmpKey.AddUserKey(new KcpKeyFile(strKeyFile)); }
catch(Exception exFile)
{
MessageService.ShowWarning(strKeyFile, KLRes.FileLoadFailed, exFile);
return null;
}
}
}
if(strUserAcc != null)
{
try { cmpKey.AddUserKey(new KcpUserAccount()); }
catch(Exception exUA)
{
MessageService.ShowWarning(exUA);
return null;
}
}
if(cmpKey.UserKeyCount > 0)
{
ClearKeyOptions(args, true);
return cmpKey;
}
return null;
}
private static void ClearKeyOptions(CommandLineArgs args, bool bOnlyIfOptionEnabled)
{
if(args == null) { Debug.Assert(false); return; }
if(bOnlyIfOptionEnabled && !Program.Config.Security.ClearKeyCommandLineParams)
return;
args.Remove(AppDefs.CommandLineOptions.Password);
args.Remove(AppDefs.CommandLineOptions.PasswordEncrypted);
args.Remove(AppDefs.CommandLineOptions.PasswordStdIn);
args.Remove(AppDefs.CommandLineOptions.KeyFile);
args.Remove(AppDefs.CommandLineOptions.PreSelect);
args.Remove(AppDefs.CommandLineOptions.UserAccount);
}
private static bool g_bReadPwStdIn = false;
private static ProtectedString g_psReadPwStdIn = null;
/// <summary>
/// Read a password from StdIn. The password is read only once
/// and then cached.
/// </summary>
internal static ProtectedString ReadPasswordStdIn(bool bFailWithUI)
{
if(g_bReadPwStdIn) return g_psReadPwStdIn;
try
{
string str = Console.ReadLine();
if(str != null)
g_psReadPwStdIn = new ProtectedString(true, str.Trim());
}
catch(Exception ex)
{
if(bFailWithUI) MessageService.ShowWarning(ex);
}
g_bReadPwStdIn = true;
return g_psReadPwStdIn;
}
internal static string[] MakeCtxIndependent(string[] vCmdLineArgs)
{
if(vCmdLineArgs == null) { Debug.Assert(false); return new string[0]; }
CommandLineArgs cl = new CommandLineArgs(vCmdLineArgs);
List<string> lFlt = new List<string>();
foreach(string strArg in vCmdLineArgs)
{
KeyValuePair<string, string> kvpArg = CommandLineArgs.GetParameter(strArg);
if(kvpArg.Key.Equals(AppDefs.CommandLineOptions.PasswordStdIn, StrUtil.CaseIgnoreCmp))
{
ProtectedString ps = ReadPasswordStdIn(true);
if((cl[AppDefs.CommandLineOptions.Password] == null) &&
(cl[AppDefs.CommandLineOptions.PasswordEncrypted] == null) &&
(ps != null))
{
lFlt.Add("-" + AppDefs.CommandLineOptions.Password + ":" +
ps.ReadString()); // No quote wrapping/encoding
}
}
else lFlt.Add(strArg);
}
return lFlt.ToArray();
}
public static bool ReAskKey(PwDatabase pwDatabase, bool bFailWithUI)
{
if(pwDatabase == null) { Debug.Assert(false); return false; }
KeyPromptForm dlg = new KeyPromptForm();
dlg.InitEx(pwDatabase.IOConnectionInfo, false, true,
KPRes.EnterCurrentCompositeKey);
if(UIUtil.ShowDialogNotValue(dlg, DialogResult.OK)) return false;
CompositeKey ck = dlg.CompositeKey;
bool bResult = ck.EqualsValue(pwDatabase.MasterKey);
if(!bResult)
MessageService.ShowWarning(KLRes.InvalidCompositeKey,
KLRes.InvalidCompositeKeyHint);
UIUtil.DestroyForm(dlg);
return bResult;
}
}
}
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