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/*
KeePass Password Safe - The Open-Source Password Manager
Copyright (C) 2003-2024 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.IO;
using System.Text;
using System.Windows.Forms;
using KeePass.Forms;
using KeePass.Resources;
using KeePass.UI;
using KeePassLib;
using KeePassLib.Interfaces;
using KeePassLib.Resources;
using KeePassLib.Security;
namespace KeePass.DataExchange.Formats
{
internal sealed class PwPrompterDat12 : FileFormatProvider
{
public override bool SupportsImport { get { return true; } }
public override bool SupportsExport { get { return false; } }
public override string FormatName { get { return "Password Prompter DAT"; } }
public override string DefaultExtension { get { return "dat"; } }
public override string ApplicationGroup { get { return KPRes.PasswordManagers; } }
public override bool ImportAppendsToRootGroupOnly { get { return true; } }
public override void Import(PwDatabase pwStorage, Stream sInput,
IStatusLogger slLogger)
{
SingleLineEditForm dlg = new SingleLineEditForm();
dlg.InitEx(KPRes.Password, KPRes.Import + ": " + this.FormatName,
KPRes.PasswordPrompt, Properties.Resources.B48x48_KGPG_Key2,
string.Empty, null);
dlg.FlagsEx |= SlfFlags.Sensitive;
if(UIUtil.ShowDialogNotValue(dlg, DialogResult.OK)) return;
string strPassword = dlg.ResultString;
UIUtil.DestroyForm(dlg);
byte[] pbPassword = Encoding.Default.GetBytes(strPassword);
BinaryReader br = new BinaryReader(sInput, Encoding.Default);
ushort usFileVersion = br.ReadUInt16();
if(usFileVersion != 0x0100)
throw new Exception(KLRes.FileVersionUnsupported);
uint uEntries = br.ReadUInt32();
uint uKeySize = br.ReadUInt32();
Debug.Assert(uKeySize == 50); // It's a constant
byte btKeyArrayLen = br.ReadByte();
byte[] pbKey = br.ReadBytes(btKeyArrayLen);
byte btValidArrayLen = br.ReadByte();
byte[] pbValid = br.ReadBytes(btValidArrayLen);
if(pbPassword.Length > 0)
{
MangleSetKey(pbPassword);
MangleDecode(pbKey);
}
MangleSetKey(pbKey);
MangleDecode(pbValid);
string strValid = Encoding.Default.GetString(pbValid);
if(strValid != "aacaaaadaaeabaacyuioqaqqaaaaaertaaajkadaadaaxywqea")
throw new Exception(KLRes.InvalidCompositeKey);
for(uint uEntry = 0; uEntry < uEntries; ++uEntry)
{
PwEntry pe = new PwEntry(true, true);
pwStorage.RootGroup.AddEntry(pe, true);
pe.Strings.Set(PwDefs.TitleField, new ProtectedString(
pwStorage.MemoryProtection.ProtectTitle, ReadString(br)));
pe.Strings.Set(PwDefs.UserNameField, new ProtectedString(
pwStorage.MemoryProtection.ProtectUserName, ReadString(br)));
pe.Strings.Set(PwDefs.PasswordField, new ProtectedString(
pwStorage.MemoryProtection.ProtectPassword, ReadString(br)));
pe.Strings.Set("Hint", new ProtectedString(false, ReadString(br)));
pe.Strings.Set(PwDefs.NotesField, new ProtectedString(
pwStorage.MemoryProtection.ProtectNotes, ReadString(br)));
pe.Strings.Set(PwDefs.UrlField, new ProtectedString(
pwStorage.MemoryProtection.ProtectUrl, ReadString(br)));
}
br.Close();
sInput.Close();
}
private string ReadString(BinaryReader br)
{
byte btLen = br.ReadByte();
byte[] pbData = br.ReadBytes(btLen);
MangleDecode(pbData);
return Encoding.Default.GetString(pbData);
}
byte[] m_pbMangleKey = null;
private void MangleSetKey(byte[] pbKey)
{
if(pbKey == null) { Debug.Assert(false); return; }
m_pbMangleKey = new byte[pbKey.Length];
Array.Copy(pbKey, m_pbMangleKey, pbKey.Length);
}
private void MangleDecode(byte[] pbData)
{
if(m_pbMangleKey == null) { Debug.Assert(false); return; }
int nKeyIndex = 0, nIndex = 0, nRemLen = pbData.Length;
bool bUp = true;
while(nRemLen > 0)
{
if(nKeyIndex > (m_pbMangleKey.Length - 1))
{
nKeyIndex = m_pbMangleKey.Length - 1;
bUp = false;
}
else if(nKeyIndex < 0)
{
nKeyIndex = 0;
bUp = true;
}
pbData[nIndex] ^= m_pbMangleKey[nKeyIndex];
nKeyIndex += (bUp ? 1 : -1);
++nIndex;
--nRemLen;
}
}
}
}
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