No OneTemporary
Actions

Size

42 KB

Referenced Files

None

Subscribers

None

View Options

	diff --git a/trunk/registryhive.cpp b/trunk/registryhive.cpp
	index f10d888..7547ae6 100644
	--- a/trunk/registryhive.cpp
	+++ b/trunk/registryhive.cpp
	@@ -1,1400 +1,1393 @@
	/*******************************************************************************
	* fred Copyright (c) 2011-2014 by Gillen Daniel <gillen.dan@pinguin.lu> *
	* *
	* Forensic Registry EDitor (fred) is a cross-platform M$ registry hive editor *
	* with special feautures useful during forensic analysis. *
	* *
	* 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 3 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, see <http://www.gnu.org/licenses/>. *
	*******************************************************************************/

	#include <QStringList>
	#include <QDateTime>
	#include <QtEndian>

	#include <QDebug>

	#include <stdlib.h>
	#include <stdio.h>

	#include "registryhive.h"

	// TODO: __WORDSIZE is not defined under mingw and I currently have no idea how
	// to identify a 64bit windows
	#ifndef __WORDSIZE
	#define __WORDSIZE 32
	#endif

	#if __WORDSIZE == 64
	#define EPOCH_DIFF 0x19DB1DED53E8000
	#else
	#define EPOCH_DIFF 0x19DB1DED53E8000LL
	#endif

	// Macros to ease UTF16 endianness conversions
	#undef UTF16LETOH
	#define UTF16LETOH(buf,buf_len) { \
	for(int buf_off=0;buf_off<((buf_len)-1);buf_off+=2) { \
	((quint16)((buf)+buf_off))=qFromLittleEndian(((quint16)((buf)+buf_off))); \
	} \
	}
	#undef UTF16BETOH
	#define UTF16BETOH(buf,buf_len) { \
	for(int buf_off=0;buf_off<((buf_len)-1);buf_off+=2) { \
	((quint16)((buf)+buf_off))=qFromBigEndian(((quint16)((buf)+buf_off))); \
	} \
	}
	#undef HTOUTF16LE
	#define HTOUTF16LE(buf,buf_len) { \
	for(int buf_off=0;buf_off<((buf_len)-1);buf_off+=2) { \
	((quint16)((buf)+buf_off))=qToLittleEndian(((quint16)((buf)+buf_off))); \
	} \
	}
	#undef HTOUTF16BE
	#define HTOUTF16BE(buf,buf_len) { \
	for(int buf_off=0;buf_off<((buf_len)-1);buf_off+=2) { \
	((quint16)((buf)+buf_off))=qToBigEndian(((quint16)((buf)+buf_off))); \
	} \
	}

	// Some errno numbers that hivex uses are not defined under Windows
	#if (defined _WIN32 \|\| defined __WIN32__) && ! defined __CYGWIN__
	// These are the same values as defined by MSVC 10, for interoperability.
	#ifndef ENOTSUP
	#define ENOTSUP 129
	#endif
	#ifndef ELOOP
	#define ELOOP 114
	#endif
	#endif

	/*******************************************************************************
	* Public
	******************************************************************************/

	/*
	* RegistryHive
	*/
	RegistryHive::RegistryHive(QObject *p_parent) : QObject(p_parent) {
	this->erro_msg="";
	this->is_error=false;
	this->hive_file="";
	this->p_hive=NULL;
	this->is_hive_open=false;
	this->is_hive_writable=false;
	this->has_changes_to_commit=false;
	}

	/*
	* ~RegistryHive
	*/
	RegistryHive::~RegistryHive() {
	if(this->is_hive_open) this->Close();
	}

	/*
	* Error
	*/
	bool RegistryHive::Error() {
	return this->is_error;
	}

	/*
	* GetErrorMsg
	*/
	QString RegistryHive::GetErrorMsg() {
	QString msg=this->erro_msg;
	this->erro_msg="";
	this->is_error=false;
	return msg;
	}

	/*
	* Open
	*/
	bool RegistryHive::Open(QString file, bool read_only) {
	if(this->is_hive_open) return false;

	// Open hive file
	- this->p_hive=hivex_open(file.toAscii().constData(),
	+ this->p_hive=hivex_open(file.toLocal8Bit().constData(),
	read_only ? 0 : HIVEX_OPEN_WRITE);
	- if(this->p_hive==NULL) return false;
	+ if(this->p_hive==NULL) {
	+ this->hive_file="";
	+ this->is_hive_open=false;
	+ this->is_hive_writable=false;
	+ this->has_changes_to_commit=false;
	+ return false;
	+ }

	// Set local vars
	this->hive_file=file;
	this->is_hive_open=true;
	this->is_hive_writable=!read_only;
	+ this->has_changes_to_commit=false;

	return true;
	}

	/*
	* Reopen
	*/
	bool RegistryHive::Reopen(bool read_only) {
	if(!this->is_hive_open) return false;

	// Close hive first
	if(hivex_close(this->p_hive)!=0) {
	// According to the docs, even if hivex_close fails, it frees all handles.
	// So we consider this fatal and final!
	this->hive_file="";
	this->is_hive_open=false;
	this->is_hive_writable=false;
	this->has_changes_to_commit=false;
	return false;
	}

	// Reopen same hive
	- this->p_hive=hivex_open(this->hive_file.toAscii().constData(),
	- read_only ? 0 : HIVEX_OPEN_WRITE);
	- if(this->p_hive==NULL) {
	- this->hive_file="";
	- this->is_hive_open=false;
	- this->is_hive_writable=false;
	- this->has_changes_to_commit=false;
	- return false;
	- }
	-
	- // Update local vars
	- this->is_hive_writable=!read_only;
	- this->has_changes_to_commit=false;
	-
	- return true;
	+ return this->Open(this->hive_file,read_only);
	}

	/*
	* CommitChanges
	*/
	bool RegistryHive::CommitChanges() {
	if(!this->is_hive_open \|\| !this->is_hive_writable) return false;
	if(!this->has_changes_to_commit) return true;

	// TODO: Maybe it would be more secure to commit changes to a new file and
	// then move it over the original one.
	if(hivex_commit(this->p_hive,NULL,0)!=0) {
	return false;
	}

	this->has_changes_to_commit=false;
	return true;
	}

	/*
	* Close
	*/
	bool RegistryHive::Close() {
	if(this->is_hive_open) {
	// As hivex_close will _ALWAYS_ free the handle, we don't need the following
	// values anymore
	this->hive_file="";
	this->is_hive_open=false;
	this->is_hive_writable=false;
	this->has_changes_to_commit=false;

	// Close hive
	if(hivex_close(this->p_hive)!=0) return false;
	}
	return true;
	}

	/*
	* Filename
	*/
	QString RegistryHive::Filename() {
	if(this->is_hive_open) return this->hive_file;
	return QString();
	}

	/*
	* HiveType
	*/
	RegistryHive::teHiveType RegistryHive::HiveType() {
	// Check for SYSTEM hive
	if(this->PathExists("\\Select") && this->PathExists("\\MountedDevices"))
	return RegistryHive::eHiveType_SYSTEM;
	// Check for SOFTWARE hive
	if(this->PathExists("\\Microsoft\\Windows\\CurrentVersion") &&
	this->PathExists("\\Microsoft\\Windows NT\\CurrentVersion"))
	return RegistryHive::eHiveType_SOFTWARE;
	// Check for SAM
	if(this->PathExists("SAM\\Domains\\Account\\Users"))
	return RegistryHive::eHiveType_SAM;
	// Check for SECURITY
	if(this->PathExists("\\Policy\\Accounts") &&
	this->PathExists("\\Policy\\PolAdtEv"))
	return RegistryHive::eHiveType_SECURITY;
	// Check for NTUSER.DAT
	if(this->PathExists("\\Software\\Microsoft\\Windows\\CurrentVersion"))
	return RegistryHive::eHiveType_NTUSER;
	// Unknown hive
	return RegistryHive::eHiveType_UNKNOWN;
	}

	/*
	* HiveTypeToString
	*/
	QString RegistryHive::HiveTypeToString(teHiveType hive_type) {
	switch(hive_type) {
	case RegistryHive::eHiveType_SYSTEM:
	return "SYSTEM";
	break;
	case RegistryHive::eHiveType_SOFTWARE:
	return "SOFTWARE";
	break;
	case RegistryHive::eHiveType_SAM:
	return "SAM";
	break;
	case RegistryHive::eHiveType_SECURITY:
	return "SECURITY";
	break;
	case RegistryHive::eHiveType_NTUSER:
	return "NTUSER";
	break;
	default:
	return "UNKNOWN";
	}
	}

	/*
	* HasChangesToCommit
	*/
	bool RegistryHive::HasChangesToCommit() {
	return this->has_changes_to_commit;
	}

	/*
	* GetNodes
	*/
	QMap<QString,int> RegistryHive::GetNodes(QString path) {
	hive_node_h parent_node;

	// Get handle to last node in path
	if(!this->GetNodeHandle(path,&parent_node)) return QMap<QString,int>();

	// Get and return nodes
	return this->GetNodesHelper(parent_node);
	}

	/*
	* GetNodes
	*/
	QMap<QString,int> RegistryHive::GetNodes(int parent_node) {
	if(parent_node==0) {
	this->SetError(tr("Invalid parent node handle specified!"));
	return QMap<QString,int>();
	}

	// Get and return nodes
	return this->GetNodesHelper(parent_node);
	}

	/*
	* GetKeys
	*/
	QMap<QString,int> RegistryHive::GetKeys(QString path) {
	hive_node_h parent_node;

	// Get handle to last node in path
	if(!this->GetNodeHandle(path,&parent_node)) return QMap<QString,int>();

	// Get and return keys
	return this->GetKeysHelper(parent_node);
	}

	/*
	* GetKeys
	*/
	QMap<QString,int> RegistryHive::GetKeys(int parent_node) {
	if(parent_node==0) {
	this->SetError(tr("Invalid parent node handle specified!"));
	return QMap<QString,int>();
	}

	// Get and return keys
	return this->GetKeysHelper(parent_node);
	}

	/*
	* GetKeyName
	*/
	bool RegistryHive::GetKeyName(int hive_key, QString &key_name) {
	char *buf;

	if(!this->is_hive_open) {
	this->SetError(tr("Need to operate on an open hive!"));
	return false;
	}

	buf=hivex_value_key(this->p_hive,(hive_value_h)hive_key);
	if(buf==NULL) {
	this->SetError(tr("Unable to get key name for key '%1'").arg(hive_key));
	return false;
	}

	key_name=QString(buf);
	free(buf);

	return true;
	}

	/*
	* GetKeyValue
	*/
	QByteArray RegistryHive::GetKeyValue(QString path,
	QString key,
	int *p_value_type,
	size_t *p_value_len)
	{
	hive_node_h parent_node;
	hive_value_h hive_key;

	// Get handle to last node in path
	if(!this->GetNodeHandle(path,&parent_node)) return QByteArray();

	// Get key handle
	hive_key=hivex_node_get_value(this->p_hive,
	parent_node,key.toAscii().constData());
	if(hive_key==0) {
	this->SetError(tr("Unable to get key handle!"));
	*p_value_len=-1;
	return QByteArray();
	}

	// Get and return key value
	return this->GetKeyValueHelper(hive_key,p_value_type,p_value_len);
	}

	/*
	* GetKeyValue
	*/
	QByteArray RegistryHive::GetKeyValue(int hive_key,
	int *p_value_type,
	size_t *p_value_len)
	{
	if(hive_key==0) {
	this->SetError(tr("Invalid key handle specified!"));
	*p_value_type=-1;
	return QByteArray();
	}

	// Get and return key value
	return this->GetKeyValueHelper(hive_key,p_value_type,p_value_len);
	}

	/*
	* GetKeyModTime
	*/
	qint64 RegistryHive::GetNodeModTime(QString path) {
	hive_node_h node;

	// Get handle to last node in path
	if(!this->GetNodeHandle(path,&node)) {
	this->SetError(tr("Unable to get node handle!"));
	return 0;
	}

	// Get and return node's last modification timestamp
	return this->GetNodeModTime(node);
	}

	/*
	* GetKeyModTime
	*/
	qint64 RegistryHive::GetNodeModTime(int node) {
	if(node==0) {
	this->SetError(tr("Invalid node handle specified!"));
	return 0;
	}

	// Get and return key's last modification timestamp
	return hivex_node_timestamp(this->p_hive,node);
	}

	/*
	* KeyValueToString
	*/
	QString RegistryHive::KeyValueToString(QByteArray value, int value_type) {
	QString ret="";

	#define ToHexStr() { \
	for(int i=0;i<value.size();i++) { \
	ret.append(QString("%1 ").arg((quint8)(value.constData()[i]), \
	2,16,QChar('0'))); \
	} \
	ret.chop(1); \
	}

	// Convert value according to it's type
	switch(value_type) {
	case hive_t_REG_SZ:
	case hive_t_REG_EXPAND_SZ:
	// A Windows string (REG_SZ), or a Windows string containing %env%
	// (environment variable expansion) elements (REG_EXPAND_SZ).
	// Encoding is unknown, but often UTF16-LE (isn't this great?)
	// Try to detect ANSI vs UNICODE encoding
	if(value.size()==0) {
	ret=QString();
	} else if(value.size()>=2 && value.endsWith(QByteArray("\x00\x00",2))) {
	// Seems to be a unicode string, convert to host endianness and return
	// TODO: What if it is UTF16-BE?? Thx Billy!
	QByteArray buf=value;
	UTF16LETOH(buf.data(),buf.size());
	ret=QString().fromUtf16((ushort*)(buf.constData()));
	} else if(value.endsWith(QByteArray("\x00",1))) {
	// Seems to be an ansi string
	ret=QString().fromAscii((char*)value.constData());
	} else {
	// If we can't detect encoding, return string as hex
	ToHexStr();
	}
	break;
	case hive_t_REG_MULTI_SZ:
	// Multiple Windows strings.
	// I suppose this is always LE encoded! M$ devs really suck!
	ret=RegistryHive::KeyValueToStringList(value).join("\n");
	break;
	case hive_t_REG_DWORD:
	// DWORD (32 bit integer), little endian
	ret=QString("0x%1")
	.arg(qFromLittleEndian((quint32)value.constData()),
	8,16,QChar('0'));
	break;
	case hive_t_REG_DWORD_BIG_ENDIAN:
	// DWORD (32 bit integer), big endian
	ret=QString("0x%1")
	.arg(qFromBigEndian((quint32)value.constData()),
	8,16,QChar('0'));
	break;
	case hive_t_REG_QWORD:
	// QWORD (64 bit integer). Usually little endian (grrrr).
	ret=QString("0x%1")
	.arg(qFromLittleEndian((quint64)value.constData()),
	16,16,QChar('0'));
	break;
	case hive_t_REG_NONE:
	case hive_t_REG_BINARY:
	case hive_t_REG_LINK:
	case hive_t_REG_RESOURCE_LIST:
	case hive_t_REG_FULL_RESOURCE_DESCRIPTOR:
	case hive_t_REG_RESOURCE_REQUIREMENTS_LIST:
	default:
	// A key without a value (REG_NONE), a blob of binary (REG_BINARY), a
	// symbolic link to another part of the registry tree (REG_LINK), a
	// resource list (REG_RESOURCE_LIST), a resource descriptor
	// (FULL_RESOURCE_DESCRIPTOR), a resource requirements list
	// (REG_RESOURCE_REQUIREMENTS_LIST) or something unknown.
	// All these are converted to hex.
	ToHexStr();
	}

	#undef ToHexStr

	return ret;
	}

	/*
	* KeyValueToString
	*/
	QString RegistryHive::KeyValueToString(QByteArray key_value,
	QString format,
	int offset,
	int length,
	bool little_endian)
	{
	int remaining_data_len;
	const char *p_data;
	QString ret="";

	// Calculate how many bytes are remainig after specified offset
	remaining_data_len=key_value.size()-offset;
	if(!remaining_data_len>0) {
	// Nothing to show
	return QString();
	}

	// Get pointer to data at specified offset
	p_data=key_value.constData();
	p_data+=offset;

	// Convert value
	if(format=="int8" && remaining_data_len>=1) {
	ret=QString("%1").arg((qint8)p_data);
	} else if(format=="uint8" && remaining_data_len>=1) {
	ret=QString("%1").arg((quint8)p_data);
	} else if(format=="int16" && remaining_data_len>=2) {
	qint16 val;
	if(little_endian) val=qFromLittleEndian((qint16)p_data);
	else val=qFromBigEndian((qint16)p_data);
	ret=QString("%1").arg(val);
	} else if(format=="uint16" && remaining_data_len>=2) {
	quint16 val;
	if(little_endian) val=qFromLittleEndian((quint16)p_data);
	else val=qFromBigEndian((quint16)p_data);
	ret=QString("%1").arg(val);
	} else if(format=="int32" && remaining_data_len>=4) {
	qint32 val;
	if(little_endian) val=qFromLittleEndian((qint32)p_data);
	else val=qFromBigEndian((qint32)p_data);
	ret=QString("%1").arg(val);
	} else if(format=="uint32" && remaining_data_len>=4) {
	quint32 val;
	if(little_endian) val=qFromLittleEndian((quint32)p_data);
	else val=qFromBigEndian((quint32)p_data);
	ret=QString("%1").arg(val);
	} else if(format=="unixtime" && remaining_data_len>=4) {
	quint32 val;
	if(little_endian) val=qFromLittleEndian((quint32)p_data);
	else val=qFromBigEndian((quint32)p_data);
	if(val==0) {
	ret="n/a";
	} else {
	QDateTime date_time;
	date_time.setTimeSpec(Qt::UTC);
	date_time.setTime_t(val);
	ret=date_time.toString("yyyy/MM/dd hh:mm:ss");
	}
	} else if(format=="int64" && remaining_data_len>=8) {
	qint64 val;
	if(little_endian) val=qFromLittleEndian((qint64)p_data);
	else val=qFromBigEndian((qint64)p_data);
	ret=QString("%1").arg(val);
	} else if(format=="uint64" && remaining_data_len>=8) {
	quint64 val;
	if(little_endian) val=qFromLittleEndian((quint64)p_data);
	else val=qFromBigEndian((quint64)p_data);
	ret=QString("%1").arg(val);
	/*
	// TODO: Check how one could implement this
	} else if(format=="unixtime64" && remaining_data_len>=8) {
	if((quint64)p_data==0) {
	ret="n/a";
	} else {
	quint64 secs=(quint64)p_data;
	QDateTime date_time;
	date_time.setTimeSpec(Qt::UTC);
	// Set 32bit part of date/time
	date_time.setTime_t(secs&0xFFFFFFFF);
	// Now add high 32bit part of date/time
	date_time.addSecs(secs>>32);
	ret=date_time.toString("yyyy/MM/dd hh:mm:ss");
	}
	*/
	} else if(format=="filetime" && remaining_data_len>=8) {
	quint64 val;
	if(little_endian) val=qFromLittleEndian((quint64)p_data);
	else val=qFromBigEndian((quint64)p_data);
	if(val==0) {
	ret="n/a";
	} else {
	// TODO: Warn if >32bit
	QDateTime date_time;
	date_time.setTimeSpec(Qt::UTC);
	date_time.setTime_t(RegistryHive::FiletimeToUnixtime(val));
	ret=date_time.toString("yyyy/MM/dd hh:mm:ss");
	}
	} else if(format=="ascii") {
	if(length!=-1) {
	// User specified how many bytes to convert
	ret=QString().fromAscii((char*)p_data,length);
	} else {
	// User did not specify how many bytes to convert, make sure data is 0
	// terminated
	if(key_value.indexOf("\x00",offset)!=-1) {
	// Data is 0 terminated
	ret=QString().fromAscii((char*)p_data);
	} else {
	// Data is not 0 terminated, convert all remaining_data_len bytes
	ret=QString().fromAscii((char*)p_data,remaining_data_len);
	}
	}
	} else if(format=="utf16" && remaining_data_len>=2) {
	QByteArray buf;
	if(length!=-1) {
	// User specified how many bytes to convert
	buf=key_value.mid(offset,(length%2)==0 ? length : length-1);
	buf.append("\x00\x00",2);
	} else {
	// User did not specify how many bytes to convert, make sure data is
	// double 0 terminated
	int null_offset=RegistryHive::FindUnicodeStringEnd(key_value.mid(offset));
	if(null_offset!=-1) {
	// Data is double 0 terminated
	buf=key_value.mid(offset,null_offset+2);
	} else {
	// Data is not double 0 terminated, convert all remaining_data_len bytes
	buf=key_value.mid(offset,
	(remaining_data_len%2)==0 ?
	remaining_data_len : remaining_data_len-1);
	buf.append("\x00\x00",2);
	}
	}
	// Convert from requested endianness to host
	if(little_endian) {
	UTF16LETOH(buf.data(),buf.size());
	} else {
	UTF16BETOH(buf.data(),buf.size());
	}
	ret=QString().fromUtf16((ushort*)buf.constData());
	} else {
	// Unknown variant type or another error
	// TODO: Maybe return an error
	return QString();
	}

	return ret;
	}

	/*
	* KeyValueToStringList
	*
	* Should only be used for REG_MULTI_SZ values
	*/
	QStringList RegistryHive::KeyValueToStringList(QByteArray value,
	bool little_endian,
	bool *p_ansi_encoded)
	{
	// Try to find value encoding (ANSI vs UNICODE)
	bool is_ansi;
	if(value.size()<=2) {
	// http://blogs.msdn.com/b/oldnewthing/archive/2009/10/08/9904646.aspx
	// Ansi version of a REG_MULTI_SZ needs to be terminated by 2 \0 chars.
	// So as long as the byte array has less or equal to 2 chars, it must be
	// empty.
	return QStringList();
	} else if(value.size()==3) {
	// Only 3 chars, this can only be an ansi string consisting of 1 char and 2
	// \0 to terminate it
	return QStringList()
	<<QString(QChar((char)((quint8)(value.constData()))));
	} else if(value.size()==4) {
	if((quint32)((quint32)(value.constData()))==0) {
	// http://blogs.msdn.com/b/oldnewthing/archive/2009/10/08/9904646.aspx
	// Unicode version of a REG_MULTI_SZ needs to be terminated by 4 \0 chars.
	// So as long as the byte array has less or equal to 4 chars, and they are
	// all 0 it must be empty.
	return QStringList();
	} else {
	// Must be the ansi version of REG_MULTI_SZ
	is_ansi=true;
	}
	} else if((quint32)((quint32)(value.right(4).constData()))==0) {
	// Value ends with 4 \0 chars, it must be unicode
	is_ansi=false;
	} else if((quint32)((quint32)(value.right(3).constData()))==0) {
	// Value ends with 3 \0 chars. Not possible according to the specs, but
	// already seen in values M$ is storing! Those were unicode.
	is_ansi=false;
	} else if((quint16)((quint16)(value.right(2).constData()))==0) {
	// Value only ends with 2 \0 chars, it must be ansi
	is_ansi=true;
	} else {
	// Value has more than 4 chars but does not end in 2 or 4 \0 chars. This
	// is not according to specs!
	return QStringList();
	}

	// Convert value to string list
	QStringList result=QStringList();
	QByteArray buf;
	int last_pos=0,cur_pos=0;
	if(!is_ansi) {
	// Extract unicode strings
	while(last_pos<value.size() &&
	(cur_pos=RegistryHive::FindUnicodeStringEnd(value,last_pos))!=-1)
	{
	if(cur_pos==last_pos) break;
	buf=value.mid(last_pos,(cur_pos-last_pos)+2);
	if(little_endian) {
	// Convert from LE to host
	UTF16LETOH(buf.data(),buf.size());
	} else {
	// Convert from BE to host
	UTF16BETOH(buf.data(),buf.size());
	}
	result.append(QString().fromUtf16((ushort*)buf.constData()));
	last_pos=cur_pos+2;
	}
	} else {
	// Extract ansi strings
	while(last_pos<value.count() &&
	(cur_pos=value.indexOf(QByteArray("\x00",1),last_pos))!=-1)
	{
	if(cur_pos==last_pos) break;
	result.append(QString().fromLocal8Bit(value.mid(last_pos,
	(cur_pos-last_pos)+1)
	.constData()));
	last_pos=cur_pos+1;
	}
	}

	if(p_ansi_encoded!=NULL) *p_ansi_encoded=is_ansi;
	return result;
	}

	/*
	* StringListToKeyValue
	*/
	QByteArray RegistryHive::StringListToKeyValue(QStringList strings,
	bool little_endian,
	bool ansi_encoded)
	{
	// Return empty key value if there are no strings
	if(strings.count()==0) {
	if(ansi_encoded) return QByteArray("\x00\x00",2);
	else return QByteArray("\x00\x00\x00\x00",4);
	}

	// Convert string list
	QByteArray result=QByteArray();
	QString cur_string;
	QByteArray buf;
	QListIterator<QString> strings_it(strings);
	while(strings_it.hasNext()) {
	cur_string=strings_it.next();
	if(ansi_encoded) {
	// Ansi encoding, simply append char string and terminating \0
	result.append(cur_string.toAscii().constData(),cur_string.size());
	result.append("\x00",1);
	} else {
	// Unicode encoding
	// First, convert value to utf16
	// TODO: May fail if there is a char that needs more than 16 bit
	buf=QByteArray((char)(cur_string.utf16()),cur_string.size()2);
	// Then convert to correct endianness
	if(little_endian) {
	HTOUTF16LE(buf.data(),buf.size());
	} else {
	HTOUTF16BE(buf.data(),buf.size());
	}
	// And finally append converted value and terminating \0\0 to result
	result.append(buf);
	result.append("\x00\x00",2);
	}
	}

	// Append terminating \0 chars and return
	if(ansi_encoded) result.append("\x00",1);
	else result.append("\x00\x00",2);
	return result;
	}

	/*
	* GetKeyValueTypes
	*/
	QStringList RegistryHive::GetKeyValueTypes() {
	return QStringList()<<"REG_NONE"
	<<"REG_SZ"
	<<"REG_EXPAND_SZ"
	<<"REG_BINARY"
	<<"REG_DWORD"
	<<"REG_DWORD_BIG_ENDIAN"
	<<"REG_LINK"
	<<"REG_MULTI_SZ"
	<<"REG_RESOURCE_LIST"
	<<"REG_FULL_RESOURCE_DESC"
	<<"REG_RESOURCE_REQ_LIST"
	<<"REG_QWORD";
	}

	/*
	* KeyTypeToString
	*/
	QString RegistryHive::KeyValueTypeToString(int value_type) {
	QString ret="";

	switch(value_type) {
	case hive_t_REG_NONE:
	ret="REG_NONE";
	break;
	case hive_t_REG_SZ:
	ret="REG_SZ";
	break;
	case hive_t_REG_EXPAND_SZ:
	ret="REG_EXPAND_SZ";
	break;
	case hive_t_REG_BINARY:
	ret="REG_BINARY";
	break;
	case hive_t_REG_DWORD:
	ret="REG_DWORD";
	break;
	case hive_t_REG_DWORD_BIG_ENDIAN:
	ret="REG_DWORD_BIG_ENDIAN";
	break;
	case hive_t_REG_LINK:
	ret="REG_LINK";
	break;
	case hive_t_REG_MULTI_SZ:
	ret="REG_MULTI_SZ";
	break;
	case hive_t_REG_RESOURCE_LIST:
	ret="REG_RESOURCE_LIST";
	break;
	case hive_t_REG_FULL_RESOURCE_DESCRIPTOR:
	ret="REG_FULL_RESOURCE_DESC";
	break;
	case hive_t_REG_RESOURCE_REQUIREMENTS_LIST:
	ret="REG_RESOURCE_REQ_LIST";
	break;
	case hive_t_REG_QWORD:
	ret="REG_QWORD";
	break;
	default:
	ret=QString("0x%1").arg((quint32)value_type,8,16,QChar('0'));
	}

	return ret;
	}

	/*
	* StringToKeyValueType
	*/
	int RegistryHive::StringToKeyValueType(QString value_type) {
	if(value_type=="REG_NONE") return hive_t_REG_NONE;
	if(value_type=="REG_SZ") return hive_t_REG_SZ;
	if(value_type=="REG_EXPAND_SZ") return hive_t_REG_EXPAND_SZ;
	if(value_type=="REG_BINARY") return hive_t_REG_BINARY;
	if(value_type=="REG_DWORD") return hive_t_REG_DWORD;
	if(value_type=="REG_DWORD_BIG_ENDIAN") return hive_t_REG_DWORD_BIG_ENDIAN;
	if(value_type=="REG_LINK") return hive_t_REG_LINK;
	if(value_type=="REG_MULTI_SZ") return hive_t_REG_MULTI_SZ;
	if(value_type=="REG_RESOURCE_LIST") return hive_t_REG_RESOURCE_LIST;
	if(value_type=="REG_FULL_RESOURCE_DESC")
	return hive_t_REG_FULL_RESOURCE_DESCRIPTOR;
	if(value_type=="REG_RESOURCE_REQ_LIST")
	return hive_t_REG_RESOURCE_REQUIREMENTS_LIST;
	if(value_type=="REG_QWORD") return hive_t_REG_QWORD;

	// I think this might be a good default :-)
	return hive_t_REG_BINARY;
	}

	/*
	* FiletimeToUnixtime
	*/
	quint64 RegistryHive::FiletimeToUnixtime(qint64 filetime) {
	return (unsigned)((filetime-EPOCH_DIFF)/10000000);
	}

	/*
	* AddNode
	*/
	int RegistryHive::AddNode(QString parent_node_path, QString node_name) {
	if(!this->is_hive_writable) return 0;

	// Make sure name does not contain a backslash char
	if(node_name.contains('\\')) {
	this->SetError(tr("Unable to add node with name '%1'. "
	"Names can not include a backslash character.")
	.arg(node_name));
	return 0;
	}

	// Get node handle to the parent where the new node should be created
	hive_node_h parent_node;
	if(!this->GetNodeHandle(parent_node_path,&parent_node)) {
	this->SetError(tr("Unable to get node handle for '%1'!")
	.arg(parent_node_path));
	return 0;
	}

	// Make sure there is no other node with same name
	QMap<QString,int> child_nodes=this->GetNodes(parent_node);
	if(child_nodes.contains(node_name.toAscii())) {
	this->SetError(tr("The node '%1\\%2' already exists!")
	.arg(parent_node_path,node_name));
	return 0;
	}

	// Add new node
	hive_node_h new_node=hivex_node_add_child(this->p_hive,
	parent_node,
	node_name.toAscii().constData());
	if(new_node==0) {
	this->SetError(tr("Unable to create new node '%1\\%2'!")
	.arg(parent_node_path,node_name));
	return 0;
	}

	this->has_changes_to_commit=true;
	return new_node;
	}

	/*
	* DeleteNode
	*/
	bool RegistryHive::DeleteNode(QString node_path) {
	if(!this->is_hive_writable) return false;

	// Get node handle to the node that should be deleted
	hive_node_h node;
	if(!this->GetNodeHandle(node_path,&node)) {
	this->SetError(tr("Unable to get node handle for '%1'!")
	.arg(node_path));
	return false;
	}

	// Delete node
	if(hivex_node_delete_child(this->p_hive,node)==-1) {
	this->SetError(tr("Unable to delete node '%1'!")
	.arg(node_path));
	return false;
	}

	this->has_changes_to_commit=true;
	return true;
	}

	/*
	* AddKey
	*/
	int RegistryHive::AddKey(QString parent_node_path,
	QString key_name,
	QString key_value_type,
	QByteArray key_value)
	{
	if(!this->is_hive_open \|\| !this->is_hive_writable) {
	this->SetError(tr("Hive has not been opened or opened read-only!"));
	return false;
	}

	return this->SetKey(parent_node_path,
	key_name,
	key_value_type,
	key_value,
	true);
	}

	/*
	* UpdateKey
	*/
	int RegistryHive::UpdateKey(QString parent_node_path,
	QString key_name,
	QString key_value_type,
	QByteArray key_value)
	{
	if(!this->is_hive_open \|\| !this->is_hive_writable) {
	this->SetError(tr("Hive has not been opened or opened read-only!"));
	return false;
	}

	return this->SetKey(parent_node_path,
	key_name,
	key_value_type,
	key_value,
	false);
	}

	/*
	* DeleteKey
	*/
	bool RegistryHive::DeleteKey(QString parent_node_path, QString key_name) {
	if(!this->is_hive_open \|\| !this->is_hive_writable) {
	this->SetError(tr("Hive has not been opened or opened read-only!"));
	return false;
	}

	// libhivex offers no possibility to delete a single key :-(
	// As a work around, this function temporarly stores all keys of the specified
	// node, then deletes them all an re-creates all but the one that should be
	// deleted.

	// Get handle to parent node
	hive_node_h parent_node;
	if(!this->GetNodeHandle(parent_node_path,&parent_node)) {
	return false;
	}

	// Get all child keys
	hive_value_h *p_keys=hivex_node_values(this->p_hive,parent_node);
	if(p_keys==NULL) {
	this->SetError(tr("Unable to enumerate child keys for parent '%1'!")
	.arg(parent_node_path));
	return false;
	}

	// Get all child key values except the one that should be deleted
	int i=0;
	char *p_name;
	int node_keys_count=0;
	hive_set_value *node_keys=NULL;

	#define FREE_NODE_KEYS() { \
	for(int x=0;x<node_keys_count;x++) { \
	free(node_keys[x].key); \
	free(node_keys[x].value); \
	} \
	free(node_keys); \
	}

	while(p_keys[i]) {
	p_name=hivex_value_key(this->p_hive,p_keys[i]);
	if(p_name==NULL) {
	this->SetError(tr("Unable to get key name for a child of '%1'!")
	.arg(parent_node_path));
	return false;
	}
	if(QString(p_name)!=key_name) {
	// Current key is not the one that should be deleted, save it
	// Alloc mem for new hive_set_value struct in node_keys array
	node_keys=(hive_set_value*)realloc(node_keys,
	sizeof(hive_set_value)*
	(node_keys_count+1));
	if(node_keys==NULL) {
	this->SetError(tr("Unable to alloc enough memory for all child keys!"));
	return false;
	}
	// Save key name in hive_set_value struct
	node_keys[node_keys_count].key=p_name;
	// Get key value, key value type and key value len and save to
	// hive_set_value struct
	node_keys[node_keys_count].value=
	hivex_value_value(this->p_hive,
	p_keys[i],
	&(node_keys[node_keys_count].t),
	&(node_keys[node_keys_count].len));
	if(node_keys[node_keys_count].value==NULL) {
	this->SetError(tr("Unable to get value for key '%1'!").arg(p_name));
	free(p_name);
	// Free all temporary stored keys
	FREE_NODE_KEYS();
	return false;
	}
	node_keys_count++;
	} else {
	// Current key is to be deleted, ignore it
	free(p_name);
	}
	i++;
	}

	// Save all stored keys to hive, which will discard the one that should be
	// deleted
	if(hivex_node_set_values(this->p_hive,
	parent_node,
	node_keys_count,
	node_keys,
	0)!=0)
	{
	this->SetError(tr("Unable to re-save all child keys! Please discard any "
	"changes you made and start over. No doing so might end "
	"in data loss!"));
	// Free all temporary stored keys
	FREE_NODE_KEYS();
	return false;
	}

	// Free all temporary stored keys and return
	FREE_NODE_KEYS();

	#undef FREE_NODE_KEYS

	this->has_changes_to_commit=true;
	return true;
	}

	/*******************************************************************************
	* Private
	******************************************************************************/

	/*
	* HivexError2String
	*/
	QString RegistryHive::HivexError2String(int error) {
	switch(error) {
	case ENOTSUP:
	return QString("Corrupt or unsupported Registry file format.");
	break;
	case HIVEX_NO_KEY:
	return QString("Missing root key.");
	break;
	case EINVAL:
	return QString("Passed an invalid argument to the function.");
	break;
	case EFAULT:
	return QString("Followed a Registry pointer which goes outside the "
	"registry or outside a registry block.");
	break;
	case ELOOP:
	return QString("Registry contains cycles.");
	break;
	case ERANGE:
	return QString("Field in the registry out of range.");
	break;
	case EEXIST:
	return QString("Registry key already exists.");
	break;
	case EROFS:
	return QString("Tried to write to a registry which is not opened for "
	"writing.");
	break;
	default:
	return QString("Unknown error.");
	}
	}

	/*
	* SetError
	*/
	void RegistryHive::SetError(QString msg) {
	this->erro_msg=msg;
	this->is_error=true;
	}

	/*
	* GetNodeHandle
	*/
	bool RegistryHive::GetNodeHandle(QString &path, hive_node_h *p_node) {
	QStringList nodes;
	int i=0;

	// Get root node handle
	*p_node=hivex_root(this->p_hive);
	if(*p_node==0) {
	this->SetError(tr("Unable to get root node!"));
	return false;
	}

	if(path!="\\") {
	// If we aren't listing the root node, we have to get a handle to the
	// last node in the path. Split path into nodes
	nodes=path.split('\\',QString::SkipEmptyParts);

	// Iterate to the correct parent node
	for(i=0;i<nodes.count();i++) {
	*p_node=hivex_node_get_child(this->p_hive,
	*p_node,
	nodes.value(i).toAscii().constData());
	if(*p_node==0) {
	this->SetError(tr("Unable to find node '%1'!").arg(nodes.value(i)));
	return false;
	}
	}
	}

	return true;
	}

	/*
	* GetKeyHandle
	*/
	bool RegistryHive::GetKeyHandle(QString &parent_node_path,
	QString &key_name,
	hive_value_h *p_key)
	{
	// Get handle to parent node
	hive_node_h parent_node;
	if(!this->GetNodeHandle(parent_node_path,&parent_node)) {
	return false;
	}

	// Get handle to key
	*p_key=hivex_node_get_value(this->p_hive,
	parent_node,
	key_name.toAscii().constData());
	if(*p_key==0) {
	this->SetError(tr("Unable to get handle to key '%1\\%2'!")
	.arg(parent_node_path,key_name));
	return false;
	}

	return true;
	}

	/*
	* GetNodesHelper
	*/
	QMap<QString,int> RegistryHive::GetNodesHelper(hive_node_h parent_node) {
	QMap<QString,int> keys;
	char *p_name;
	int i=0;

	// Get child nodes
	hive_node_h *child_nodes=hivex_node_children(this->p_hive,parent_node);
	if(child_nodes==NULL) {
	this->SetError(
	tr("Unable to enumerate child nodes!"));
	return QMap<QString,int>();
	}

	// Build result
	keys.clear();
	i=0;
	while(child_nodes[i]) {
	p_name=hivex_node_name(this->p_hive,child_nodes[i]);
	if(p_name==NULL) {
	this->SetError(tr("Unable to get node name!"));
	free(child_nodes);
	return QMap<QString,int>();
	}
	keys.insert(QString(p_name),(int)child_nodes[i]);
	free(p_name);
	i++;
	}
	free(child_nodes);

	return keys;
	}

	/*
	* GetKeysHelper
	*/
	QMap<QString,int> RegistryHive::GetKeysHelper(hive_node_h parent_node) {
	QMap<QString,int> keys;
	char *p_name;
	int i=0;

	// Get child keys
	hive_value_h *p_keys=hivex_node_values(this->p_hive,parent_node);
	if(p_keys==NULL) {
	this->SetError(
	tr("Unable to enumerate child keys!"));
	return QMap<QString,int>();
	}

	// Build result list
	keys.clear();
	i=0;

	while(p_keys[i]) {
	p_name=hivex_value_key(this->p_hive,p_keys[i]);
	if(p_name==NULL) {
	this->SetError(tr("Unable to get key name!"));
	return QMap<QString,int>();
	}
	keys.insert(QString(p_name),p_keys[i]);
	free(p_name);
	i++;
	}
	free(p_keys);

	return keys;
	}

	/*
	* GetKeyValueHelper
	*/
	QByteArray RegistryHive::GetKeyValueHelper(hive_value_h hive_key,
	int *p_value_type,
	size_t *p_value_len)
	{
	QByteArray key_value;
	char *p_key_value;

	p_key_value=hivex_value_value(this->p_hive,
	hive_key,
	(hive_type*)p_value_type,
	p_value_len);
	if(p_key_value==NULL) {
	this->SetError(tr("Unable to get key value!"));
	*p_value_type=-1;
	return QByteArray();
	}

	// Feed QByteArray and free p_key_value
	key_value=QByteArray(p_key_value,*p_value_len);
	free(p_key_value);

	return key_value;
	}

	/*
	* PathExists
	*/
	bool RegistryHive::PathExists(QString path) {
	bool ret;
	hive_node_h node;

	ret=this->GetNodeHandle(path,&node);
	if(!ret \|\| this->Error()) {
	// Clear error and return false
	this->GetErrorMsg();
	return false;
	}

	return true;
	}

	/*
	* SetKey
	*/
	int RegistryHive::SetKey(QString &parent_node_path,
	QString &key_name,
	QString &key_value_type,
	QByteArray &key_value,
	bool create_key)
	{
	// Get node handle to the node that holds the key to create/update
	hive_node_h parent_node;
	if(!this->GetNodeHandle(parent_node_path,&parent_node)) {
	return 0;
	}

	// Make sure key exists if we should update it
	if(!create_key) {
	hive_value_h temp_key=hivex_node_get_value(this->p_hive,
	parent_node,
	key_name.toAscii().constData());
	if(temp_key==0) {
	this->SetError(tr("Inexisting key '%1\\%2' can't be updated!")
	.arg(parent_node_path,key_name));
	return 0;
	}
	}

	// Create and populate hive_set_value structure
	hive_set_value key_val;
	key_val.key=(char)malloc((sizeof(char)key_name.toAscii().count())+1);
	key_val.value=(char)malloc(sizeof(char)key_value.size());
	if(key_val.key==NULL \|\| key_val.value==NULL) {
	this->SetError(tr("Unable to alloc memory for hive_set_value struct!"));
	return 0;
	}
	strcpy(key_val.key,key_name.toAscii().constData());
	key_val.t=(hive_type)this->StringToKeyValueType(key_value_type);
	key_val.len=key_value.size();
	memcpy(key_val.value,key_value.constData(),key_value.size());

	// Create/Update key
	if(hivex_node_set_value(this->p_hive,parent_node,&key_val,0)!=0) {
	this->SetError(tr("Unable to update key '%1\\%2'!")
	.arg(parent_node_path,key_name));
	return 0;
	}

	// Free the hive_set_value structure
	free(key_val.key);
	free(key_val.value);

	// To make sure everything worked, a hadle to the new key is now requeried
	// from hive and then returned
	hive_value_h key;
	if(!this->GetKeyHandle(parent_node_path,key_name,&key)) {
	return 0;
	}

	this->has_changes_to_commit=true;
	return key;
	}

	/*
	* FindUnicodeStringEnd
	*/
	int RegistryHive::FindUnicodeStringEnd(QByteArray data, int offset) {
	int end_pos;
	for(end_pos=offset;end_pos<(data.size()-1);end_pos+=2) {
	if(((quint16)(data.constData()+end_pos))==0) break;
	}
	return end_pos<(data.size()-1) ? end_pos : -1;
	}

File Metadata

Mime Type: text/x-diff
Expires: Tue, Dec 24, 3:04 AM (1 d, 8 h)
Storage Engine: blob
Storage Format: Raw Data
Storage Handle: 1176844
Default Alt Text: (42 KB)

No OneTemporaryActions

View Options

File Metadata

Event Timeline

No OneTemporary
Actions