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KdbxFile.Read.Streamed.cs
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KdbxFile.Read.Streamed.cs
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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.IO;
using System.Text;
using System.Xml;
#if !KeePassUAP
using System.Drawing;
#endif
using KeePassLib;
using KeePassLib.Collections;
using KeePassLib.Interfaces;
using KeePassLib.Resources;
using KeePassLib.Security;
using KeePassLib.Utility;
namespace KeePassLib.Serialization
{
/// <summary>
/// Serialization to KeePass KDBX files.
/// </summary>
public sealed partial class KdbxFile
{
private enum KdbContext
{
Null,
KeePassFile,
Meta,
Root,
MemoryProtection,
CustomIcons,
CustomIcon,
Binaries,
CustomData,
CustomDataItem,
RootDeletedObjects,
DeletedObject,
Group,
GroupTimes,
GroupCustomData,
GroupCustomDataItem,
Entry,
EntryTimes,
EntryString,
EntryBinary,
EntryAutoType,
EntryAutoTypeItem,
EntryHistory,
EntryCustomData,
EntryCustomDataItem
}
private bool m_bReadNextNode = true;
private Stack<PwGroup> m_ctxGroups = new Stack<PwGroup>();
private PwGroup m_ctxGroup = null;
private PwEntry m_ctxEntry = null;
private string m_ctxStringName = null;
private ProtectedString m_ctxStringValue = null;
private string m_ctxBinaryName = null;
private ProtectedBinary m_ctxBinaryValue = null;
private string m_ctxATName = null;
private string m_ctxATSeq = null;
private bool m_bEntryInHistory = false;
private PwEntry m_ctxHistoryBase = null;
private PwDeletedObject m_ctxDeletedObject = null;
private PwUuid m_uuidCustomIconID = PwUuid.Zero;
private byte[] m_pbCustomIconData = null;
private string m_strCustomIconName = null;
private DateTime? m_odtCustomIconLastMod = null;
private string m_strCustomDataKey = null;
private string m_strCustomDataValue = null;
private DateTime? m_odtCustomDataLastMod = null;
private string m_strGroupCustomDataKey = null;
private string m_strGroupCustomDataValue = null;
private string m_strEntryCustomDataKey = null;
private string m_strEntryCustomDataValue = null;
private void ReadXmlStreamed(Stream sXml, Stream sParent)
{
using(XmlReader xr = XmlUtilEx.CreateXmlReader(sXml))
{
ReadDocumentStreamed(xr, sParent);
}
}
private void ReadDocumentStreamed(XmlReader xr, Stream sParentStream)
{
Debug.Assert(xr != null);
if(xr == null) throw new ArgumentNullException("xr");
m_ctxGroups.Clear();
KdbContext ctx = KdbContext.Null;
uint uTagCounter = 0;
bool bSupportsStatus = (m_slLogger != null);
long lStreamLength = 1;
try
{
sParentStream.Position.ToString(); // Test Position support
lStreamLength = sParentStream.Length;
}
catch(Exception) { bSupportsStatus = false; }
if(lStreamLength <= 0) { Debug.Assert(false); lStreamLength = 1; }
m_bReadNextNode = true;
while(true)
{
if(m_bReadNextNode)
{
if(!xr.Read()) break;
}
else m_bReadNextNode = true;
switch(xr.NodeType)
{
case XmlNodeType.Element:
ctx = ReadXmlElement(ctx, xr);
break;
case XmlNodeType.EndElement:
ctx = EndXmlElement(ctx, xr);
break;
case XmlNodeType.XmlDeclaration:
break; // Ignore
default:
Debug.Assert(false);
break;
}
++uTagCounter;
if(((uTagCounter & 0xFFU) == 0) && bSupportsStatus)
{
Debug.Assert(lStreamLength == sParentStream.Length);
uint uPct = (uint)((sParentStream.Position * 100) /
lStreamLength);
// Clip percent value in case the stream reports incorrect
// position/length values (M120413)
if(uPct > 100) { Debug.Assert(false); uPct = 100; }
if(!m_slLogger.SetProgress(uPct))
throw new OperationCanceledException();
}
}
Debug.Assert(ctx == KdbContext.Null);
if(ctx != KdbContext.Null) throw new FormatException();
Debug.Assert(m_ctxGroups.Count == 0);
if(m_ctxGroups.Count != 0) throw new FormatException();
}
private KdbContext ReadXmlElement(KdbContext ctx, XmlReader xr)
{
Debug.Assert(xr.NodeType == XmlNodeType.Element);
switch(ctx)
{
case KdbContext.Null:
if(xr.Name == ElemDocNode)
return SwitchContext(ctx, KdbContext.KeePassFile, xr);
else ReadUnknown(xr);
break;
case KdbContext.KeePassFile:
if(xr.Name == ElemMeta)
return SwitchContext(ctx, KdbContext.Meta, xr);
else if(xr.Name == ElemRoot)
return SwitchContext(ctx, KdbContext.Root, xr);
else ReadUnknown(xr);
break;
case KdbContext.Meta:
if(xr.Name == ElemGenerator)
ReadString(xr); // Ignore
else if(xr.Name == ElemHeaderHash)
{
// The header hash is typically only stored in
// KDBX <= 3.1 files, not in KDBX >= 4 files
// (here, the header is verified via a HMAC),
// but we also support it for KDBX >= 4 files
// (i.e. if it's present, we check it)
string strHash = ReadString(xr);
if(!string.IsNullOrEmpty(strHash) && (m_pbHashOfHeader != null) &&
!m_bRepairMode)
{
Debug.Assert(m_uFileVersion < FileVersion32_4);
byte[] pbHash = Convert.FromBase64String(strHash);
if(!MemUtil.ArraysEqual(pbHash, m_pbHashOfHeader))
throw new InvalidDataException(KLRes.FileCorrupted);
}
}
else if(xr.Name == ElemSettingsChanged)
m_pwDatabase.SettingsChanged = ReadTime(xr);
else if(xr.Name == ElemDbName)
m_pwDatabase.Name = ReadString(xr);
else if(xr.Name == ElemDbNameChanged)
m_pwDatabase.NameChanged = ReadTime(xr);
else if(xr.Name == ElemDbDesc)
m_pwDatabase.Description = ReadString(xr);
else if(xr.Name == ElemDbDescChanged)
m_pwDatabase.DescriptionChanged = ReadTime(xr);
else if(xr.Name == ElemDbDefaultUser)
m_pwDatabase.DefaultUserName = ReadString(xr);
else if(xr.Name == ElemDbDefaultUserChanged)
m_pwDatabase.DefaultUserNameChanged = ReadTime(xr);
else if(xr.Name == ElemDbMntncHistoryDays)
m_pwDatabase.MaintenanceHistoryDays = ReadUInt(xr, 365);
else if(xr.Name == ElemDbColor)
{
string strColor = ReadString(xr);
if(!string.IsNullOrEmpty(strColor))
m_pwDatabase.Color = ColorTranslator.FromHtml(strColor);
}
else if(xr.Name == ElemDbKeyChanged)
m_pwDatabase.MasterKeyChanged = ReadTime(xr);
else if(xr.Name == ElemDbKeyChangeRec)
m_pwDatabase.MasterKeyChangeRec = ReadLong(xr, -1);
else if(xr.Name == ElemDbKeyChangeForce)
m_pwDatabase.MasterKeyChangeForce = ReadLong(xr, -1);
else if(xr.Name == ElemDbKeyChangeForceOnce)
m_pwDatabase.MasterKeyChangeForceOnce = ReadBool(xr, false);
else if(xr.Name == ElemMemoryProt)
return SwitchContext(ctx, KdbContext.MemoryProtection, xr);
else if(xr.Name == ElemCustomIcons)
return SwitchContext(ctx, KdbContext.CustomIcons, xr);
else if(xr.Name == ElemRecycleBinEnabled)
m_pwDatabase.RecycleBinEnabled = ReadBool(xr, true);
else if(xr.Name == ElemRecycleBinUuid)
m_pwDatabase.RecycleBinUuid = ReadUuid(xr);
else if(xr.Name == ElemRecycleBinChanged)
m_pwDatabase.RecycleBinChanged = ReadTime(xr);
else if(xr.Name == ElemEntryTemplatesGroup)
m_pwDatabase.EntryTemplatesGroup = ReadUuid(xr);
else if(xr.Name == ElemEntryTemplatesGroupChanged)
m_pwDatabase.EntryTemplatesGroupChanged = ReadTime(xr);
else if(xr.Name == ElemHistoryMaxItems)
m_pwDatabase.HistoryMaxItems = ReadInt(xr, -1);
else if(xr.Name == ElemHistoryMaxSize)
m_pwDatabase.HistoryMaxSize = ReadLong(xr, -1);
else if(xr.Name == ElemLastSelectedGroup)
m_pwDatabase.LastSelectedGroup = ReadUuid(xr);
else if(xr.Name == ElemLastTopVisibleGroup)
m_pwDatabase.LastTopVisibleGroup = ReadUuid(xr);
else if(xr.Name == ElemBinaries)
return SwitchContext(ctx, KdbContext.Binaries, xr);
else if(xr.Name == ElemCustomData)
return SwitchContext(ctx, KdbContext.CustomData, xr);
else ReadUnknown(xr);
break;
case KdbContext.MemoryProtection:
if(xr.Name == ElemProtTitle)
m_pwDatabase.MemoryProtection.ProtectTitle = ReadBool(xr, false);
else if(xr.Name == ElemProtUserName)
m_pwDatabase.MemoryProtection.ProtectUserName = ReadBool(xr, false);
else if(xr.Name == ElemProtPassword)
m_pwDatabase.MemoryProtection.ProtectPassword = ReadBool(xr, true);
else if(xr.Name == ElemProtUrl)
m_pwDatabase.MemoryProtection.ProtectUrl = ReadBool(xr, false);
else if(xr.Name == ElemProtNotes)
m_pwDatabase.MemoryProtection.ProtectNotes = ReadBool(xr, false);
// else if(xr.Name == ElemProtAutoHide)
// m_pwDatabase.MemoryProtection.AutoEnableVisualHiding = ReadBool(xr, true);
else ReadUnknown(xr);
break;
case KdbContext.CustomIcons:
if(xr.Name == ElemCustomIconItem)
return SwitchContext(ctx, KdbContext.CustomIcon, xr);
else ReadUnknown(xr);
break;
case KdbContext.CustomIcon:
if(xr.Name == ElemCustomIconItemID)
m_uuidCustomIconID = ReadUuid(xr);
else if(xr.Name == ElemCustomIconItemData)
{
string strData = ReadString(xr);
if(!string.IsNullOrEmpty(strData))
m_pbCustomIconData = Convert.FromBase64String(strData);
else { Debug.Assert(false); }
}
else if(xr.Name == ElemName)
m_strCustomIconName = ReadString(xr);
else if(xr.Name == ElemLastModTime)
m_odtCustomIconLastMod = ReadTime(xr);
else ReadUnknown(xr);
break;
case KdbContext.Binaries:
if(xr.Name == ElemBinary)
{
if(xr.MoveToAttribute(AttrId))
{
string strKey = xr.Value;
ProtectedBinary pbData = ReadProtectedBinary(xr);
int iKey;
if(!StrUtil.TryParseIntInvariant(strKey, out iKey))
throw new FormatException();
if(iKey < 0) throw new FormatException();
Debug.Assert(m_pbsBinaries.Get(iKey) == null);
Debug.Assert(m_pbsBinaries.Find(pbData) < 0);
m_pbsBinaries.Set(iKey, pbData);
}
else ReadUnknown(xr);
}
else ReadUnknown(xr);
break;
case KdbContext.CustomData:
if(xr.Name == ElemStringDictExItem)
return SwitchContext(ctx, KdbContext.CustomDataItem, xr);
else ReadUnknown(xr);
break;
case KdbContext.CustomDataItem:
if(xr.Name == ElemKey)
m_strCustomDataKey = ReadString(xr);
else if(xr.Name == ElemValue)
m_strCustomDataValue = ReadString(xr);
else if(xr.Name == ElemLastModTime)
m_odtCustomDataLastMod = ReadTime(xr);
else ReadUnknown(xr);
break;
case KdbContext.Root:
if(xr.Name == ElemGroup)
{
Debug.Assert(m_ctxGroups.Count == 0);
if(m_ctxGroups.Count != 0) throw new FormatException();
m_pwDatabase.RootGroup = new PwGroup(false, false);
m_ctxGroups.Push(m_pwDatabase.RootGroup);
m_ctxGroup = m_ctxGroups.Peek();
return SwitchContext(ctx, KdbContext.Group, xr);
}
else if(xr.Name == ElemDeletedObjects)
return SwitchContext(ctx, KdbContext.RootDeletedObjects, xr);
else ReadUnknown(xr);
break;
case KdbContext.Group:
if(xr.Name == ElemUuid)
m_ctxGroup.Uuid = ReadUuid(xr);
else if(xr.Name == ElemName)
m_ctxGroup.Name = ReadString(xr);
else if(xr.Name == ElemNotes)
m_ctxGroup.Notes = ReadString(xr);
else if(xr.Name == ElemIcon)
m_ctxGroup.IconId = ReadIconId(xr, PwIcon.Folder);
else if(xr.Name == ElemCustomIconID)
m_ctxGroup.CustomIconUuid = ReadUuid(xr);
else if(xr.Name == ElemTimes)
return SwitchContext(ctx, KdbContext.GroupTimes, xr);
else if(xr.Name == ElemIsExpanded)
m_ctxGroup.IsExpanded = ReadBool(xr, true);
else if(xr.Name == ElemGroupDefaultAutoTypeSeq)
m_ctxGroup.DefaultAutoTypeSequence = ReadString(xr);
else if(xr.Name == ElemEnableAutoType)
m_ctxGroup.EnableAutoType = StrUtil.StringToBoolEx(ReadString(xr));
else if(xr.Name == ElemEnableSearching)
m_ctxGroup.EnableSearching = StrUtil.StringToBoolEx(ReadString(xr));
else if(xr.Name == ElemLastTopVisibleEntry)
m_ctxGroup.LastTopVisibleEntry = ReadUuid(xr);
else if(xr.Name == ElemPreviousParentGroup)
m_ctxGroup.PreviousParentGroup = ReadUuid(xr);
else if(xr.Name == ElemTags)
m_ctxGroup.Tags = StrUtil.StringToTags(ReadString(xr));
else if(xr.Name == ElemCustomData)
return SwitchContext(ctx, KdbContext.GroupCustomData, xr);
else if(xr.Name == ElemGroup)
{
m_ctxGroup = new PwGroup(false, false);
m_ctxGroups.Peek().AddGroup(m_ctxGroup, true);
m_ctxGroups.Push(m_ctxGroup);
return SwitchContext(ctx, KdbContext.Group, xr);
}
else if(xr.Name == ElemEntry)
{
m_ctxEntry = new PwEntry(false, false);
m_ctxGroup.AddEntry(m_ctxEntry, true);
m_bEntryInHistory = false;
return SwitchContext(ctx, KdbContext.Entry, xr);
}
else ReadUnknown(xr);
break;
case KdbContext.GroupCustomData:
if(xr.Name == ElemStringDictExItem)
return SwitchContext(ctx, KdbContext.GroupCustomDataItem, xr);
else ReadUnknown(xr);
break;
case KdbContext.GroupCustomDataItem:
if(xr.Name == ElemKey)
m_strGroupCustomDataKey = ReadString(xr);
else if(xr.Name == ElemValue)
m_strGroupCustomDataValue = ReadString(xr);
else ReadUnknown(xr);
break;
case KdbContext.Entry:
if(xr.Name == ElemUuid)
m_ctxEntry.Uuid = ReadUuid(xr);
else if(xr.Name == ElemIcon)
m_ctxEntry.IconId = ReadIconId(xr, PwIcon.Key);
else if(xr.Name == ElemCustomIconID)
m_ctxEntry.CustomIconUuid = ReadUuid(xr);
else if(xr.Name == ElemFgColor)
{
string strColor = ReadString(xr);
if(!string.IsNullOrEmpty(strColor))
m_ctxEntry.ForegroundColor = ColorTranslator.FromHtml(strColor);
}
else if(xr.Name == ElemBgColor)
{
string strColor = ReadString(xr);
if(!string.IsNullOrEmpty(strColor))
m_ctxEntry.BackgroundColor = ColorTranslator.FromHtml(strColor);
}
else if(xr.Name == ElemOverrideUrl)
m_ctxEntry.OverrideUrl = ReadString(xr);
else if(xr.Name == ElemQualityCheck)
m_ctxEntry.QualityCheck = ReadBool(xr, true);
else if(xr.Name == ElemTags)
m_ctxEntry.Tags = StrUtil.StringToTags(ReadString(xr));
else if(xr.Name == ElemPreviousParentGroup)
m_ctxEntry.PreviousParentGroup = ReadUuid(xr);
else if(xr.Name == ElemTimes)
return SwitchContext(ctx, KdbContext.EntryTimes, xr);
else if(xr.Name == ElemString)
return SwitchContext(ctx, KdbContext.EntryString, xr);
else if(xr.Name == ElemBinary)
return SwitchContext(ctx, KdbContext.EntryBinary, xr);
else if(xr.Name == ElemAutoType)
return SwitchContext(ctx, KdbContext.EntryAutoType, xr);
else if(xr.Name == ElemCustomData)
return SwitchContext(ctx, KdbContext.EntryCustomData, xr);
else if(xr.Name == ElemHistory)
{
Debug.Assert(m_bEntryInHistory == false);
if(m_bEntryInHistory == false)
{
m_ctxHistoryBase = m_ctxEntry;
return SwitchContext(ctx, KdbContext.EntryHistory, xr);
}
else ReadUnknown(xr);
}
else ReadUnknown(xr);
break;
case KdbContext.GroupTimes:
case KdbContext.EntryTimes:
ITimeLogger tl = ((ctx == KdbContext.GroupTimes) ?
(ITimeLogger)m_ctxGroup : (ITimeLogger)m_ctxEntry);
Debug.Assert(tl != null);
if(xr.Name == ElemCreationTime)
tl.CreationTime = ReadTime(xr);
else if(xr.Name == ElemLastModTime)
tl.LastModificationTime = ReadTime(xr);
else if(xr.Name == ElemLastAccessTime)
tl.LastAccessTime = ReadTime(xr);
else if(xr.Name == ElemExpiryTime)
tl.ExpiryTime = ReadTime(xr);
else if(xr.Name == ElemExpires)
tl.Expires = ReadBool(xr, false);
else if(xr.Name == ElemUsageCount)
tl.UsageCount = ReadULong(xr, 0);
else if(xr.Name == ElemLocationChanged)
tl.LocationChanged = ReadTime(xr);
else ReadUnknown(xr);
break;
case KdbContext.EntryString:
if(xr.Name == ElemKey)
m_ctxStringName = ReadString(xr);
else if(xr.Name == ElemValue)
m_ctxStringValue = ReadProtectedString(xr);
else ReadUnknown(xr);
break;
case KdbContext.EntryBinary:
if(xr.Name == ElemKey)
m_ctxBinaryName = ReadString(xr);
else if(xr.Name == ElemValue)
m_ctxBinaryValue = ReadProtectedBinary(xr);
else ReadUnknown(xr);
break;
case KdbContext.EntryAutoType:
if(xr.Name == ElemAutoTypeEnabled)
m_ctxEntry.AutoType.Enabled = ReadBool(xr, true);
else if(xr.Name == ElemAutoTypeObfuscation)
m_ctxEntry.AutoType.ObfuscationOptions =
(AutoTypeObfuscationOptions)ReadInt(xr, 0);
else if(xr.Name == ElemAutoTypeDefaultSeq)
m_ctxEntry.AutoType.DefaultSequence = ReadString(xr);
else if(xr.Name == ElemAutoTypeItem)
return SwitchContext(ctx, KdbContext.EntryAutoTypeItem, xr);
else ReadUnknown(xr);
break;
case KdbContext.EntryAutoTypeItem:
if(xr.Name == ElemWindow)
m_ctxATName = ReadString(xr);
else if(xr.Name == ElemKeystrokeSequence)
m_ctxATSeq = ReadString(xr);
else ReadUnknown(xr);
break;
case KdbContext.EntryCustomData:
if(xr.Name == ElemStringDictExItem)
return SwitchContext(ctx, KdbContext.EntryCustomDataItem, xr);
else ReadUnknown(xr);
break;
case KdbContext.EntryCustomDataItem:
if(xr.Name == ElemKey)
m_strEntryCustomDataKey = ReadString(xr);
else if(xr.Name == ElemValue)
m_strEntryCustomDataValue = ReadString(xr);
else ReadUnknown(xr);
break;
case KdbContext.EntryHistory:
if(xr.Name == ElemEntry)
{
m_ctxEntry = new PwEntry(false, false);
m_ctxHistoryBase.History.Add(m_ctxEntry);
m_bEntryInHistory = true;
return SwitchContext(ctx, KdbContext.Entry, xr);
}
else ReadUnknown(xr);
break;
case KdbContext.RootDeletedObjects:
if(xr.Name == ElemDeletedObject)
{
m_ctxDeletedObject = new PwDeletedObject();
m_pwDatabase.DeletedObjects.Add(m_ctxDeletedObject);
return SwitchContext(ctx, KdbContext.DeletedObject, xr);
}
else ReadUnknown(xr);
break;
case KdbContext.DeletedObject:
if(xr.Name == ElemUuid)
m_ctxDeletedObject.Uuid = ReadUuid(xr);
else if(xr.Name == ElemDeletionTime)
m_ctxDeletedObject.DeletionTime = ReadTime(xr);
else ReadUnknown(xr);
break;
default:
ReadUnknown(xr);
break;
}
return ctx;
}
private KdbContext EndXmlElement(KdbContext ctx, XmlReader xr)
{
Debug.Assert(xr.NodeType == XmlNodeType.EndElement);
if((ctx == KdbContext.KeePassFile) && (xr.Name == ElemDocNode))
return KdbContext.Null;
else if((ctx == KdbContext.Meta) && (xr.Name == ElemMeta))
return KdbContext.KeePassFile;
else if((ctx == KdbContext.Root) && (xr.Name == ElemRoot))
return KdbContext.KeePassFile;
else if((ctx == KdbContext.MemoryProtection) && (xr.Name == ElemMemoryProt))
return KdbContext.Meta;
else if((ctx == KdbContext.CustomIcons) && (xr.Name == ElemCustomIcons))
return KdbContext.Meta;
else if((ctx == KdbContext.CustomIcon) && (xr.Name == ElemCustomIconItem))
{
if(!m_uuidCustomIconID.Equals(PwUuid.Zero) &&
(m_pbCustomIconData != null))
{
PwCustomIcon ci = new PwCustomIcon(m_uuidCustomIconID,
m_pbCustomIconData);
if(m_strCustomIconName != null) ci.Name = m_strCustomIconName;
ci.LastModificationTime = m_odtCustomIconLastMod;
m_pwDatabase.CustomIcons.Add(ci);
}
else { Debug.Assert(false); }
m_uuidCustomIconID = PwUuid.Zero;
m_pbCustomIconData = null;
m_strCustomIconName = null;
m_odtCustomIconLastMod = null;
return KdbContext.CustomIcons;
}
else if((ctx == KdbContext.Binaries) && (xr.Name == ElemBinaries))
return KdbContext.Meta;
else if((ctx == KdbContext.CustomData) && (xr.Name == ElemCustomData))
return KdbContext.Meta;
else if((ctx == KdbContext.CustomDataItem) && (xr.Name == ElemStringDictExItem))
{
if((m_strCustomDataKey != null) && (m_strCustomDataValue != null))
m_pwDatabase.CustomData.Set(m_strCustomDataKey,
m_strCustomDataValue, m_odtCustomDataLastMod);
else { Debug.Assert(false); }
m_strCustomDataKey = null;
m_strCustomDataValue = null;
m_odtCustomDataLastMod = null;
return KdbContext.CustomData;
}
else if((ctx == KdbContext.Group) && (xr.Name == ElemGroup))
{
if(PwUuid.Zero.Equals(m_ctxGroup.Uuid))
m_ctxGroup.Uuid = new PwUuid(true); // No assert (import)
m_ctxGroups.Pop();
if(m_ctxGroups.Count == 0)
{
m_ctxGroup = null;
return KdbContext.Root;
}
else
{
m_ctxGroup = m_ctxGroups.Peek();
return KdbContext.Group;
}
}
else if((ctx == KdbContext.GroupTimes) && (xr.Name == ElemTimes))
return KdbContext.Group;
else if((ctx == KdbContext.GroupCustomData) && (xr.Name == ElemCustomData))
return KdbContext.Group;
else if((ctx == KdbContext.GroupCustomDataItem) && (xr.Name == ElemStringDictExItem))
{
if((m_strGroupCustomDataKey != null) && (m_strGroupCustomDataValue != null))
m_ctxGroup.CustomData.Set(m_strGroupCustomDataKey, m_strGroupCustomDataValue);
else { Debug.Assert(false); }
m_strGroupCustomDataKey = null;
m_strGroupCustomDataValue = null;
return KdbContext.GroupCustomData;
}
else if((ctx == KdbContext.Entry) && (xr.Name == ElemEntry))
{
// Create new UUID if absent
if(PwUuid.Zero.Equals(m_ctxEntry.Uuid))
m_ctxEntry.Uuid = new PwUuid(true); // No assert (import)
if(m_bEntryInHistory)
{
m_ctxEntry = m_ctxHistoryBase;
return KdbContext.EntryHistory;
}
return KdbContext.Group;
}
else if((ctx == KdbContext.EntryTimes) && (xr.Name == ElemTimes))
return KdbContext.Entry;
else if((ctx == KdbContext.EntryString) && (xr.Name == ElemString))
{
m_ctxEntry.Strings.Set(m_ctxStringName, m_ctxStringValue);
m_ctxStringName = null;
m_ctxStringValue = null;
return KdbContext.Entry;
}
else if((ctx == KdbContext.EntryBinary) && (xr.Name == ElemBinary))
{
if(string.IsNullOrEmpty(m_strDetachBins))
m_ctxEntry.Binaries.Set(m_ctxBinaryName, m_ctxBinaryValue);
else
{
SaveBinary(m_ctxBinaryName, m_ctxBinaryValue, m_strDetachBins);
m_ctxBinaryValue = null;
GC.Collect();
}
m_ctxBinaryName = null;
m_ctxBinaryValue = null;
return KdbContext.Entry;
}
else if((ctx == KdbContext.EntryAutoType) && (xr.Name == ElemAutoType))
return KdbContext.Entry;
else if((ctx == KdbContext.EntryAutoTypeItem) && (xr.Name == ElemAutoTypeItem))
{
AutoTypeAssociation atAssoc = new AutoTypeAssociation(m_ctxATName,
m_ctxATSeq);
m_ctxEntry.AutoType.Add(atAssoc);
m_ctxATName = null;
m_ctxATSeq = null;
return KdbContext.EntryAutoType;
}
else if((ctx == KdbContext.EntryCustomData) && (xr.Name == ElemCustomData))
return KdbContext.Entry;
else if((ctx == KdbContext.EntryCustomDataItem) && (xr.Name == ElemStringDictExItem))
{
if((m_strEntryCustomDataKey != null) && (m_strEntryCustomDataValue != null))
m_ctxEntry.CustomData.Set(m_strEntryCustomDataKey, m_strEntryCustomDataValue);
else { Debug.Assert(false); }
m_strEntryCustomDataKey = null;
m_strEntryCustomDataValue = null;
return KdbContext.EntryCustomData;
}
else if((ctx == KdbContext.EntryHistory) && (xr.Name == ElemHistory))
{
m_bEntryInHistory = false;
return KdbContext.Entry;
}
else if((ctx == KdbContext.RootDeletedObjects) && (xr.Name == ElemDeletedObjects))
return KdbContext.Root;
else if((ctx == KdbContext.DeletedObject) && (xr.Name == ElemDeletedObject))
{
m_ctxDeletedObject = null;
return KdbContext.RootDeletedObjects;
}
else
{
Debug.Assert(false);
throw new FormatException();
}
}
private string ReadString(XmlReader xr)
{
XorredBuffer xb = ProcessNode(xr);
if(xb != null)
{
Debug.Assert(false); // Protected data is unexpected here
try
{
byte[] pb = xb.ReadPlainText();
if(pb.Length == 0) return string.Empty;
try { return StrUtil.Utf8.GetString(pb, 0, pb.Length); }
finally { MemUtil.ZeroByteArray(pb); }
}
finally { xb.Dispose(); }
}
m_bReadNextNode = false; // ReadElementString skips end tag
return xr.ReadElementString();
}
private string ReadStringRaw(XmlReader xr)
{
m_bReadNextNode = false; // ReadElementString skips end tag
return xr.ReadElementString();
}
private byte[] ReadBase64(XmlReader xr, bool bRaw)
{
// if(bRaw) return ReadBase64RawInChunks(xr);
string str = (bRaw ? ReadStringRaw(xr) : ReadString(xr));
if(string.IsNullOrEmpty(str)) return MemUtil.EmptyByteArray;
return Convert.FromBase64String(str);
}
/* private byte[] m_pbBase64ReadBuf = new byte[1024 * 1024 * 3];
private byte[] ReadBase64RawInChunks(XmlReader xr)
{
xr.MoveToContent();
List<byte[]> lParts = new List<byte[]>();
byte[] pbBuf = m_pbBase64ReadBuf;
while(true)
{
int cb = xr.ReadElementContentAsBase64(pbBuf, 0, pbBuf.Length);
if(cb == 0) break;
byte[] pb = new byte[cb];
Array.Copy(pbBuf, 0, pb, 0, cb);
lParts.Add(pb);
// No break when cb < pbBuf.Length, because ReadElementContentAsBase64
// moves to the next XML node only when returning 0
}
m_bReadNextNode = false;
if(lParts.Count == 0) return MemUtil.EmptyByteArray;
if(lParts.Count == 1) return lParts[0];
long cbRes = 0;
for(int i = 0; i < lParts.Count; ++i)
cbRes += lParts[i].Length;
byte[] pbRes = new byte[cbRes];
int cbCur = 0;
for(int i = 0; i < lParts.Count; ++i)
{
Array.Copy(lParts[i], 0, pbRes, cbCur, lParts[i].Length);
cbCur += lParts[i].Length;
}
return pbRes;
} */
private bool ReadBool(XmlReader xr, bool bDefault)
{
string str = ReadString(xr);
if(str == ValTrue) return true;
else if(str == ValFalse) return false;
Debug.Assert(false);
return bDefault;
}
private PwUuid ReadUuid(XmlReader xr)
{
byte[] pb = ReadBase64(xr, false);
if(pb.Length == 0) return PwUuid.Zero;
return new PwUuid(pb);
}
private int ReadInt(XmlReader xr, int nDefault)
{
string str = ReadString(xr);
int n;
if(StrUtil.TryParseIntInvariant(str, out n)) return n;
// Backward compatibility
if(StrUtil.TryParseInt(str, out n)) return n;
Debug.Assert(false);
return nDefault;
}
private uint ReadUInt(XmlReader xr, uint uDefault)
{
string str = ReadString(xr);
uint u;
if(StrUtil.TryParseUIntInvariant(str, out u)) return u;
// Backward compatibility
if(StrUtil.TryParseUInt(str, out u)) return u;
Debug.Assert(false);
return uDefault;
}
private long ReadLong(XmlReader xr, long lDefault)
{
string str = ReadString(xr);
long l;
if(StrUtil.TryParseLongInvariant(str, out l)) return l;
// Backward compatibility
if(StrUtil.TryParseLong(str, out l)) return l;
Debug.Assert(false);
return lDefault;
}
private ulong ReadULong(XmlReader xr, ulong uDefault)
{
string str = ReadString(xr);
ulong u;
if(StrUtil.TryParseULongInvariant(str, out u)) return u;
// Backward compatibility
if(StrUtil.TryParseULong(str, out u)) return u;
Debug.Assert(false);
return uDefault;
}
private DateTime ReadTime(XmlReader xr)
{
// Cf. WriteObject(string, DateTime)
if((m_format == KdbxFormat.Default) && (m_uFileVersion >= FileVersion32_4))
{
// long l = ReadLong(xr, -1);
// if(l != -1) return DateTime.FromBinary(l);
byte[] pb = ReadBase64(xr, false);
if(pb.Length != 8)
{
Debug.Assert(false);
byte[] pb8 = new byte[8];
Array.Copy(pb, pb8, Math.Min(pb.Length, 8)); // Little-endian
pb = pb8;
}
long lSec = MemUtil.BytesToInt64(pb);
return new DateTime(lSec * TimeSpan.TicksPerSecond, DateTimeKind.Utc);
}
else
{
string str = ReadString(xr);
DateTime dt;
if(TimeUtil.TryDeserializeUtc(str, out dt)) return dt;
}
Debug.Assert(false);
return m_dtNow;
}
private PwIcon ReadIconId(XmlReader xr, PwIcon icDefault)
{
int i = ReadInt(xr, (int)icDefault);
if((i >= 0) && (i < (int)PwIcon.Count)) return (PwIcon)i;
Debug.Assert(false);
return icDefault;
}
private ProtectedString ReadProtectedString(XmlReader xr)
{
XorredBuffer xb = ProcessNode(xr);
if(xb != null)
{
try { return new ProtectedString(true, xb); }
finally { xb.Dispose(); }
}
bool bProtect = false;
if(m_format == KdbxFormat.PlainXml)
{
if(xr.MoveToAttribute(AttrProtectedInMemPlainXml))
{
string strProtect = xr.Value;
bProtect = ((strProtect != null) && (strProtect == ValTrue));
}
}
return new ProtectedString(bProtect, ReadString(xr));
}
private ProtectedBinary ReadProtectedBinary(XmlReader xr)
{
if(xr.MoveToAttribute(AttrRef))
{
string strRef = xr.Value;
if(!string.IsNullOrEmpty(strRef))
{
int iRef;
if(StrUtil.TryParseIntInvariant(strRef, out iRef))
{
ProtectedBinary pb = m_pbsBinaries.Get(iRef);
if(pb != null)
{
// https://sourceforge.net/p/keepass/feature-requests/2023/
xr.MoveToElement();
#if DEBUG
string strInner = ReadStringRaw(xr);
Debug.Assert(string.IsNullOrEmpty(strInner));
#else
ReadStringRaw(xr);
#endif
return pb;
}