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ffsengine.cpp
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ffsengine.cpp
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/* ffsengine.cpp
Copyright (c) 2015, Nikolaj Schlej. All rights reserved.
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHWARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
*/
#include <math.h>
#include "ffsengine.h"
#include "types.h"
#include "treemodel.h"
#include "descriptor.h"
#include "ffs.h"
#include "gbe.h"
#include "me.h"
#include "Tiano/EfiTianoCompress.h"
#include "Tiano/EfiTianoDecompress.h"
#include "LZMA/LzmaCompress.h"
#include "LZMA/LzmaDecompress.h"
#include "LZMA/x86Convert.h"
#ifdef _CONSOLE
#include <iostream>
#endif
QString errorMessage(UINT8 errorCode)
{
switch (errorCode) {
case ERR_SUCCESS: return QObject::tr("Success");
case ERR_NOT_IMPLEMENTED: return QObject::tr("Not implemented");
case ERR_INVALID_PARAMETER: return QObject::tr("Function called with invalid parameter");
case ERR_BUFFER_TOO_SMALL: return QObject::tr("Buffer too small");
case ERR_OUT_OF_RESOURCES: return QObject::tr("Out of resources");
case ERR_OUT_OF_MEMORY: return QObject::tr("Out of memory");
case ERR_FILE_OPEN: return QObject::tr("File can't be opened");
case ERR_FILE_READ: return QObject::tr("File can't be read");
case ERR_FILE_WRITE: return QObject::tr("File can't be written");
case ERR_ITEM_NOT_FOUND: return QObject::tr("Item not found");
case ERR_UNKNOWN_ITEM_TYPE: return QObject::tr("Unknown item type");
case ERR_INVALID_FLASH_DESCRIPTOR: return QObject::tr("Invalid flash descriptor");
case ERR_INVALID_REGION: return QObject::tr("Invalid region");
case ERR_EMPTY_REGION: return QObject::tr("Empty region");
case ERR_BIOS_REGION_NOT_FOUND: return QObject::tr("BIOS region not found");
case ERR_VOLUMES_NOT_FOUND: return QObject::tr("UEFI volumes not found");
case ERR_INVALID_VOLUME: return QObject::tr("Invalid UEFI volume");
case ERR_VOLUME_REVISION_NOT_SUPPORTED: return QObject::tr("Volume revision not supported");
case ERR_VOLUME_GROW_FAILED: return QObject::tr("Volume grow failed");
case ERR_UNKNOWN_FFS: return QObject::tr("Unknown file system");
case ERR_INVALID_FILE: return QObject::tr("Invalid file");
case ERR_INVALID_SECTION: return QObject::tr("Invalid section");
case ERR_UNKNOWN_SECTION: return QObject::tr("Unknown section");
case ERR_STANDARD_COMPRESSION_FAILED: return QObject::tr("Standard compression failed");
case ERR_CUSTOMIZED_COMPRESSION_FAILED: return QObject::tr("Customized compression failed");
case ERR_STANDARD_DECOMPRESSION_FAILED: return QObject::tr("Standard decompression failed");
case ERR_CUSTOMIZED_DECOMPRESSION_FAILED: return QObject::tr("Customized compression failed");
case ERR_UNKNOWN_COMPRESSION_ALGORITHM: return QObject::tr("Unknown compression method");
case ERR_UNKNOWN_EXTRACT_MODE: return QObject::tr("Unknown extract mode");
case ERR_UNKNOWN_INSERT_MODE: return QObject::tr("Unknown insert mode");
case ERR_UNKNOWN_IMAGE_TYPE: return QObject::tr("Unknown executable image type");
case ERR_UNKNOWN_PE_OPTIONAL_HEADER_TYPE: return QObject::tr("Unknown PE optional header type");
case ERR_UNKNOWN_RELOCATION_TYPE: return QObject::tr("Unknown relocation type");
case ERR_GENERIC_CALL_NOT_SUPPORTED: return QObject::tr("Generic call not supported");
case ERR_VOLUME_BASE_NOT_FOUND: return QObject::tr("Volume base address not found");
case ERR_PEI_CORE_ENTRY_POINT_NOT_FOUND: return QObject::tr("PEI core entry point not found");
case ERR_COMPLEX_BLOCK_MAP: return QObject::tr("Block map structure too complex for correct analysis");
case ERR_DIR_ALREADY_EXIST: return QObject::tr("Directory already exists");
case ERR_DIR_CREATE: return QObject::tr("Directory can't be created");
case ERR_UNKNOWN_PATCH_TYPE: return QObject::tr("Unknown patch type");
case ERR_PATCH_OFFSET_OUT_OF_BOUNDS: return QObject::tr("Patch offset out of bounds");
case ERR_INVALID_SYMBOL: return QObject::tr("Invalid symbol");
case ERR_NOTHING_TO_PATCH: return QObject::tr("Nothing to patch");
case ERR_DEPEX_PARSE_FAILED: return QObject::tr("Dependency expression parsing failed");
case ERR_TRUNCATED_IMAGE: return QObject::tr("Image is truncated");
case ERR_BAD_RELOCATION_ENTRY: return QObject::tr("Bad image relocation entry");
default: return QObject::tr("Unknown error %1").arg(errorCode);
}
}
FfsEngine::FfsEngine(QObject *parent)
: QObject(parent)
{
model = new TreeModel();
oldPeiCoreEntryPoint = 0;
newPeiCoreEntryPoint = 0;
dumped = false;
}
FfsEngine::~FfsEngine(void)
{
delete model;
}
TreeModel* FfsEngine::treeModel() const
{
return model;
}
void FfsEngine::msg(const QString & message, const QModelIndex & index)
{
#ifndef _DISABLE_ENGINE_MESSAGES
#ifndef _CONSOLE
messageItems.enqueue(MessageListItem(message, NULL, 0, index));
#else
(void) index;
std::cout << message.toLatin1().constData() << std::endl;
#endif
#else
(void)message;
(void)index;
#endif
}
#ifndef _CONSOLE
QQueue<MessageListItem> FfsEngine::messages() const
{
return messageItems;
}
void FfsEngine::clearMessages()
{
messageItems.clear();
}
#endif
bool FfsEngine::hasIntersection(const UINT32 begin1, const UINT32 end1, const UINT32 begin2, const UINT32 end2)
{
if (begin1 < begin2 && begin2 < end1)
return true;
if (begin1 < end2 && end2 < end1)
return true;
if (begin2 < begin1 && begin1 < end2)
return true;
if (begin2 < end1 && end1 < end2)
return true;
return false;
}
// Firmware image parsing
UINT8 FfsEngine::parseImageFile(const QByteArray & buffer)
{
oldPeiCoreEntryPoint = 0;
newPeiCoreEntryPoint = 0;
// Check buffer size to be more then or equal to size of EFI_CAPSULE_HEADER
if ((UINT32)buffer.size() <= sizeof(EFI_CAPSULE_HEADER)) {
msg(tr("parseImageFile: image file is smaller then minimum size of %1h (%2) bytes").hexarg(sizeof(EFI_CAPSULE_HEADER)).arg(sizeof(EFI_CAPSULE_HEADER)));
return ERR_INVALID_PARAMETER;
}
// Check buffer for being normal EFI capsule header
UINT32 capsuleHeaderSize = 0;
QModelIndex index;
if (buffer.startsWith(EFI_CAPSULE_GUID)
|| buffer.startsWith(INTEL_CAPSULE_GUID)) {
// Get info
const EFI_CAPSULE_HEADER* capsuleHeader = (const EFI_CAPSULE_HEADER*)buffer.constData();
capsuleHeaderSize = capsuleHeader->HeaderSize;
QByteArray header = buffer.left(capsuleHeaderSize);
QByteArray body = buffer.right(buffer.size() - capsuleHeaderSize);
QString name = tr("UEFI capsule");
QString info = tr("Capsule GUID: %1\nFull size: %2h (%3)\nHeader size: %4h (%5)\nImage size: %6h (%7)\nFlags: %8h")
.arg(guidToQString(capsuleHeader->CapsuleGuid))
.hexarg(buffer.size()).arg(buffer.size())
.hexarg(capsuleHeader->HeaderSize).arg(capsuleHeader->HeaderSize)
.hexarg(capsuleHeader->CapsuleImageSize).arg(capsuleHeader->CapsuleImageSize)
.hexarg2(capsuleHeader->Flags, 8);
// Add tree item
index = model->addItem(Types::Capsule, Subtypes::UefiCapsule, COMPRESSION_ALGORITHM_NONE, name, "", info, header, body);
}
// Check buffer for being Toshiba capsule header
else if (buffer.startsWith(TOSHIBA_CAPSULE_GUID)) {
// Get info
const TOSHIBA_CAPSULE_HEADER* capsuleHeader = (const TOSHIBA_CAPSULE_HEADER*)buffer.constData();
capsuleHeaderSize = capsuleHeader->HeaderSize;
QByteArray header = buffer.left(capsuleHeaderSize);
QByteArray body = buffer.right(buffer.size() - capsuleHeaderSize);
QString name = tr("UEFI capsule");
QString info = tr("Capsule GUID: %1\nFull size: %2h (%3)\nHeader size: %4h (%5)\nImage size: %6h (%7)\nFlags: %8h")
.arg(guidToQString(capsuleHeader->CapsuleGuid))
.hexarg(buffer.size()).arg(buffer.size())
.hexarg(capsuleHeader->HeaderSize).arg(capsuleHeader->HeaderSize)
.hexarg(capsuleHeader->FullSize - capsuleHeader->HeaderSize).arg(capsuleHeader->FullSize - capsuleHeader->HeaderSize)
.hexarg2(capsuleHeader->Flags, 8);
// Add tree item
index = model->addItem(Types::Capsule, Subtypes::ToshibaCapsule, COMPRESSION_ALGORITHM_NONE, name, "", info, header, body);
}
// Check buffer for being extended Aptio signed capsule header
else if (buffer.startsWith(APTIO_SIGNED_CAPSULE_GUID) || buffer.startsWith(APTIO_UNSIGNED_CAPSULE_GUID)) {
// Get info
bool signedCapsule = buffer.startsWith(APTIO_SIGNED_CAPSULE_GUID);
const APTIO_CAPSULE_HEADER* capsuleHeader = (const APTIO_CAPSULE_HEADER*)buffer.constData();
capsuleHeaderSize = capsuleHeader->RomImageOffset;
QByteArray header = buffer.left(capsuleHeaderSize);
QByteArray body = buffer.right(buffer.size() - capsuleHeaderSize);
QString name = tr("AMI Aptio capsule");
QString info = tr("Capsule GUID: %1\nFull size: %2h (%3)\nHeader size: %4h (%5)\nImage size: %6h (%7)\nFlags: %8h")
.arg(guidToQString(capsuleHeader->CapsuleHeader.CapsuleGuid))
.hexarg(buffer.size()).arg(buffer.size())
.hexarg(capsuleHeaderSize).arg(capsuleHeaderSize)
.hexarg(capsuleHeader->CapsuleHeader.CapsuleImageSize - capsuleHeaderSize).arg(capsuleHeader->CapsuleHeader.CapsuleImageSize - capsuleHeaderSize)
.hexarg2(capsuleHeader->CapsuleHeader.Flags, 8);
//!TODO: more info about Aptio capsule
// Add tree item
index = model->addItem(Types::Capsule, signedCapsule ? Subtypes::AptioSignedCapsule : Subtypes::AptioUnsignedCapsule, COMPRESSION_ALGORITHM_NONE, name, "", info, header, body);
// Show message about possible Aptio signature break
if (signedCapsule) {
msg(tr("parseImageFile: Aptio capsule signature may become invalid after image modifications"), index);
}
}
// Skip capsule header to have flash chip image
QByteArray flashImage = buffer.right(buffer.size() - capsuleHeaderSize);
// Check for Intel flash descriptor presence
const FLASH_DESCRIPTOR_HEADER* descriptorHeader = (const FLASH_DESCRIPTOR_HEADER*)flashImage.constData();
// Check descriptor signature
UINT8 result;
if (descriptorHeader->Signature == FLASH_DESCRIPTOR_SIGNATURE) {
// Parse as Intel image
QModelIndex imageIndex;
result = parseIntelImage(flashImage, imageIndex, index);
if (result != ERR_INVALID_FLASH_DESCRIPTOR)
return result;
}
// Get info
QString name = tr("UEFI image");
QString info = tr("Full size: %1h (%2)")
.hexarg(flashImage.size()).arg(flashImage.size());
// Add tree item
index = model->addItem(Types::Image, Subtypes::UefiImage, COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), flashImage, index);
return parseBios(flashImage, index);
}
UINT8 FfsEngine::parseIntelImage(const QByteArray & intelImage, QModelIndex & index, const QModelIndex & parent)
{
// Sanity check
if (intelImage.isEmpty())
return EFI_INVALID_PARAMETER;
// Store the beginning of descriptor as descriptor base address
const UINT8* descriptor = (const UINT8*)intelImage.constData();
UINT32 descriptorBegin = 0;
UINT32 descriptorEnd = FLASH_DESCRIPTOR_SIZE;
// Check for buffer size to be greater or equal to descriptor region size
if (intelImage.size() < FLASH_DESCRIPTOR_SIZE) {
msg(tr("parseIntelImage: input file is smaller than minimum descriptor size of 1000h (4096) bytes"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
// Parse descriptor map
const FLASH_DESCRIPTOR_MAP* descriptorMap = (const FLASH_DESCRIPTOR_MAP*)(descriptor + sizeof(FLASH_DESCRIPTOR_HEADER));
const FLASH_DESCRIPTOR_UPPER_MAP* upperMap = (const FLASH_DESCRIPTOR_UPPER_MAP*)(descriptor + FLASH_DESCRIPTOR_UPPER_MAP_BASE);
// Check sanity of base values
if (descriptorMap->MasterBase > FLASH_DESCRIPTOR_MAX_BASE
|| descriptorMap->MasterBase == descriptorMap->RegionBase
|| descriptorMap->MasterBase == descriptorMap->ComponentBase) {
msg(tr("parseIntelImage: invalid descriptor master base %1h").hexarg2(descriptorMap->MasterBase, 2));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
if (descriptorMap->RegionBase > FLASH_DESCRIPTOR_MAX_BASE
|| descriptorMap->RegionBase == descriptorMap->ComponentBase) {
msg(tr("parseIntelImage: invalid descriptor region base %1h").hexarg2(descriptorMap->RegionBase, 2));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
if (descriptorMap->ComponentBase > FLASH_DESCRIPTOR_MAX_BASE) {
msg(tr("parseIntelImage: invalid descriptor component base %1h").hexarg2(descriptorMap->ComponentBase, 2));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
const FLASH_DESCRIPTOR_REGION_SECTION* regionSection = (const FLASH_DESCRIPTOR_REGION_SECTION*)calculateAddress8(descriptor, descriptorMap->RegionBase);
const FLASH_DESCRIPTOR_COMPONENT_SECTION* componentSection = (const FLASH_DESCRIPTOR_COMPONENT_SECTION*)calculateAddress8(descriptor, descriptorMap->ComponentBase);
// Check for legacy descriptor version by getting hardcoded value of FlashParameters.ReadClockFrequency
UINT8 descriptorVersion = 2; // Skylake+ descriptor
if (componentSection->FlashParameters.ReadClockFrequency == FLASH_FREQUENCY_20MHZ) // Legacy descriptor
descriptorVersion = 1;
// ME region
QByteArray me;
UINT32 meBegin = 0;
UINT32 meEnd = 0;
if (regionSection->MeLimit) {
meBegin = calculateRegionOffset(regionSection->MeBase);
meEnd = calculateRegionSize(regionSection->MeBase, regionSection->MeLimit);
me = intelImage.mid(meBegin, meEnd);
meEnd += meBegin;
}
// BIOS region
QByteArray bios;
UINT32 biosBegin = 0;
UINT32 biosEnd = 0;
if (regionSection->BiosLimit) {
biosBegin = calculateRegionOffset(regionSection->BiosBase);
biosEnd = calculateRegionSize(regionSection->BiosBase, regionSection->BiosLimit);
// Check for Gigabyte specific descriptor map
if (biosEnd - biosBegin == (UINT32)intelImage.size()) {
if (!meEnd) {
msg(tr("parseIntelImage: can't determine BIOS region start from Gigabyte-specific descriptor"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
biosBegin = meEnd;
bios = intelImage.mid(biosBegin, biosEnd);
// biosEnd will point to the end of the image file
// it may be wrong, but it's pretty hard to detect a padding after BIOS region
// with malformed descriptor
}
// Normal descriptor map
else {
bios = intelImage.mid(biosBegin, biosEnd);
// Calculate biosEnd
biosEnd += biosBegin;
}
}
else {
msg(tr("parseIntelImage: descriptor parsing failed, BIOS region not found in descriptor"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
// GbE region
QByteArray gbe;
UINT32 gbeBegin = 0;
UINT32 gbeEnd = 0;
if (regionSection->GbeLimit) {
gbeBegin = calculateRegionOffset(regionSection->GbeBase);
gbeEnd = calculateRegionSize(regionSection->GbeBase, regionSection->GbeLimit);
gbe = intelImage.mid(gbeBegin, gbeEnd);
gbeEnd += gbeBegin;
}
// PDR region
QByteArray pdr;
UINT32 pdrBegin = 0;
UINT32 pdrEnd = 0;
if (regionSection->PdrLimit) {
pdrBegin = calculateRegionOffset(regionSection->PdrBase);
pdrEnd = calculateRegionSize(regionSection->PdrBase, regionSection->PdrLimit);
pdr = intelImage.mid(pdrBegin, pdrEnd);
pdrEnd += pdrBegin;
}
// EC region
QByteArray ec;
UINT32 ecBegin = 0;
UINT32 ecEnd = 0;
if (descriptorVersion == 2) {
if (regionSection->EcLimit) {
ecBegin = calculateRegionOffset(regionSection->EcBase);
ecEnd = calculateRegionSize(regionSection->EcBase, regionSection->EcLimit);
ec = intelImage.mid(ecBegin, ecEnd);
ecEnd += ecBegin;
}
}
// Check for intersections between regions
// Descriptor
if (hasIntersection(descriptorBegin, descriptorEnd, gbeBegin, gbeEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, descriptor region has intersection with GbE region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
if (hasIntersection(descriptorBegin, descriptorEnd, meBegin, meEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, descriptor region has intersection with ME region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
if (hasIntersection(descriptorBegin, descriptorEnd, biosBegin, biosEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, descriptor region has intersection with BIOS region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
if (hasIntersection(descriptorBegin, descriptorEnd, pdrBegin, pdrEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, descriptor region has intersection with PDR region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
if (descriptorVersion == 2 && hasIntersection(descriptorBegin, descriptorEnd, ecBegin, ecEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, descriptor region has intersection with EC region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
// GbE
if (hasIntersection(gbeBegin, gbeEnd, meBegin, meEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, GbE region has intersection with ME region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
if (hasIntersection(gbeBegin, gbeEnd, biosBegin, biosEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, GbE region has intersection with BIOS region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
if (hasIntersection(gbeBegin, gbeEnd, pdrBegin, pdrEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, GbE region has intersection with PDR region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
if (descriptorVersion == 2 && hasIntersection(gbeBegin, gbeEnd, ecBegin, ecEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, GbE region has intersection with EC region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
// ME
if (hasIntersection(meBegin, meEnd, biosBegin, biosEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, ME region has intersection with BIOS region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
if (hasIntersection(meBegin, meEnd, pdrBegin, pdrEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, ME region has intersection with PDR region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
if (descriptorVersion == 2 && hasIntersection(meBegin, meEnd, ecBegin, ecEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, ME region has intersection with EC region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
// BIOS
if (hasIntersection(biosBegin, biosEnd, pdrBegin, pdrEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, BIOS region has intersection with PDR region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
if (descriptorVersion == 2 && hasIntersection(biosBegin, biosEnd, ecBegin, ecEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, BIOS region has intersection with EC region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
// PDR
if (descriptorVersion == 2 && hasIntersection(pdrBegin, pdrEnd, ecBegin, ecEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, PDR region has intersection with EC region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
// Region map is consistent
// Intel image
QString name = tr("Intel image");
QString info = tr("Full size: %1h (%2)\nFlash chips: %3\nMasters: %4\nPCH straps: %5\nCPU straps: %6\n")
.hexarg(intelImage.size()).arg(intelImage.size())
.arg(descriptorMap->NumberOfFlashChips + 1)
.arg(descriptorMap->NumberOfMasters + 1)
.arg(descriptorMap->NumberOfPchStraps)
.arg(descriptorMap->NumberOfProcStraps);
// Add Intel image tree item
index = model->addItem(Types::Image, Subtypes::IntelImage, COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), intelImage, parent);
// Descriptor
// Get descriptor info
QByteArray body = intelImage.left(FLASH_DESCRIPTOR_SIZE);
name = tr("Descriptor region");
info = tr("Full size: %1h (%2)").hexarg(FLASH_DESCRIPTOR_SIZE).arg(FLASH_DESCRIPTOR_SIZE);
// Check regions presence once again
QVector<UINT32> offsets;
if (regionSection->GbeLimit) {
offsets.append(gbeBegin);
info += tr("\nGbE region offset: %1h").hexarg(gbeBegin);
}
if (regionSection->MeLimit) {
offsets.append(meBegin);
info += tr("\nME region offset: %1h").hexarg(meBegin);
}
if (regionSection->BiosLimit) {
offsets.append(biosBegin);
info += tr("\nBIOS region offset: %1h").hexarg(biosBegin);
}
if (regionSection->PdrLimit) {
offsets.append(pdrBegin);
info += tr("\nPDR region offset: %1h").hexarg(pdrBegin);
}
if (descriptorVersion == 2 && regionSection->EcLimit) {
offsets.append(ecBegin);
info += tr("\nEC region offset: %1h").hexarg(ecBegin);
}
// Region access settings
if (descriptorVersion == 1) {
const FLASH_DESCRIPTOR_MASTER_SECTION* masterSection = (const FLASH_DESCRIPTOR_MASTER_SECTION*)calculateAddress8(descriptor, descriptorMap->MasterBase);
info += tr("\nRegion access settings:");
info += tr("\nBIOS:%1%2h ME:%3%4h GbE:%5%6h")
.hexarg2(masterSection->BiosRead, 2)
.hexarg2(masterSection->BiosWrite, 2)
.hexarg2(masterSection->MeRead, 2)
.hexarg2(masterSection->MeWrite, 2)
.hexarg2(masterSection->GbeRead, 2)
.hexarg2(masterSection->GbeWrite, 2);
// BIOS access table
info += tr("\nBIOS access table:");
info += tr("\n Read Write");
info += tr("\nDesc %1 %2")
.arg(masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_DESC ? "Yes " : "No ")
.arg(masterSection->BiosWrite & FLASH_DESCRIPTOR_REGION_ACCESS_DESC ? "Yes " : "No ");
info += tr("\nBIOS Yes Yes");
info += tr("\nME %1 %2")
.arg(masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_ME ? "Yes " : "No ")
.arg(masterSection->BiosWrite & FLASH_DESCRIPTOR_REGION_ACCESS_ME ? "Yes " : "No ");
info += tr("\nGbE %1 %2")
.arg(masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_GBE ? "Yes " : "No ")
.arg(masterSection->BiosWrite & FLASH_DESCRIPTOR_REGION_ACCESS_GBE ? "Yes " : "No ");
info += tr("\nPDR %1 %2")
.arg(masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_PDR ? "Yes " : "No ")
.arg(masterSection->BiosWrite & FLASH_DESCRIPTOR_REGION_ACCESS_PDR ? "Yes " : "No ");
}
else if (descriptorVersion == 2) {
const FLASH_DESCRIPTOR_MASTER_SECTION_V2* masterSection = (const FLASH_DESCRIPTOR_MASTER_SECTION_V2*)calculateAddress8(descriptor, descriptorMap->MasterBase);
info += tr("\nRegion access settings:");
info += tr("\nBIOS: %1h %2h ME: %3h %4h\nGbE: %5h %6h EC: %7h %8h")
.hexarg2(masterSection->BiosRead, 3)
.hexarg2(masterSection->BiosWrite, 3)
.hexarg2(masterSection->MeRead, 3)
.hexarg2(masterSection->MeWrite, 3)
.hexarg2(masterSection->GbeRead, 3)
.hexarg2(masterSection->GbeWrite, 3)
.hexarg2(masterSection->EcRead, 3)
.hexarg2(masterSection->EcWrite, 3);
// BIOS access table
info += tr("\nBIOS access table:");
info += tr("\n Read Write");
info += tr("\nDesc %1 %2")
.arg(masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_DESC ? "Yes " : "No ")
.arg(masterSection->BiosWrite & FLASH_DESCRIPTOR_REGION_ACCESS_DESC ? "Yes " : "No ");
info += tr("\nBIOS Yes Yes");
info += tr("\nME %1 %2")
.arg(masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_ME ? "Yes " : "No ")
.arg(masterSection->BiosWrite & FLASH_DESCRIPTOR_REGION_ACCESS_ME ? "Yes " : "No ");
info += tr("\nGbE %1 %2")
.arg(masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_GBE ? "Yes " : "No ")
.arg(masterSection->BiosWrite & FLASH_DESCRIPTOR_REGION_ACCESS_GBE ? "Yes " : "No ");
info += tr("\nPDR %1 %2")
.arg(masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_PDR ? "Yes " : "No ")
.arg(masterSection->BiosWrite & FLASH_DESCRIPTOR_REGION_ACCESS_PDR ? "Yes " : "No ");
info += tr("\nEC %1 %2")
.arg(masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_EC ? "Yes " : "No ")
.arg(masterSection->BiosWrite & FLASH_DESCRIPTOR_REGION_ACCESS_EC ? "Yes " : "No ");
// Prepend descriptor version if present
if (descriptorMap->DescriptorVersion != FLASH_DESCRIPTOR_VERSION_INVALID) {
const FLASH_DESCRIPTOR_VERSION* version = (const FLASH_DESCRIPTOR_VERSION*)&descriptorMap->DescriptorVersion;
QString versionStr = tr("Flash descriptor version: %1.%2").arg(version->Major).arg(version->Minor);
if (version->Major != FLASH_DESCRIPTOR_VERSION_MAJOR || version->Minor != FLASH_DESCRIPTOR_VERSION_MINOR) {
versionStr += tr(", unknown");
msg(tr("parseIntelImage: unknown flash descriptor version %1.%2").arg(version->Major).arg(version->Minor));
}
info = versionStr + "\n" + info;
}
}
// VSCC table
const VSCC_TABLE_ENTRY* vsccTableEntry = (const VSCC_TABLE_ENTRY*)(descriptor + ((UINT16)upperMap->VsccTableBase << 4));
info += tr("\nFlash chips in VSCC table:");
UINT8 vsscTableSize = upperMap->VsccTableSize * sizeof(UINT32) / sizeof(VSCC_TABLE_ENTRY);
for (int i = 0; i < vsscTableSize; i++) {
info += tr("\n%1%2%3h")
.hexarg2(vsccTableEntry->VendorId, 2)
.hexarg2(vsccTableEntry->DeviceId0, 2)
.hexarg2(vsccTableEntry->DeviceId1, 2);
vsccTableEntry++;
}
// Add descriptor tree item
model->addItem(Types::Region, Subtypes::DescriptorRegion, COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), body, index);
// Sort regions in ascending order
qSort(offsets);
// Parse regions
UINT8 result = 0;
for (int i = 0; i < offsets.count(); i++) {
// Parse GbE region
if (offsets.at(i) == gbeBegin) {
QModelIndex gbeIndex;
result = parseGbeRegion(gbe, gbeIndex, index);
}
// Parse ME region
else if (offsets.at(i) == meBegin) {
QModelIndex meIndex;
result = parseMeRegion(me, meIndex, index);
}
// Parse BIOS region
else if (offsets.at(i) == biosBegin) {
QModelIndex biosIndex;
result = parseBiosRegion(bios, biosIndex, index);
}
// Parse PDR region
else if (offsets.at(i) == pdrBegin) {
QModelIndex pdrIndex;
result = parsePdrRegion(pdr, pdrIndex, index);
}
// Parse EC region
else if (descriptorVersion == 2 && offsets.at(i) == ecBegin) {
QModelIndex ecIndex;
result = parseEcRegion(ec, ecIndex, index);
}
if (result)
return result;
}
// Add the data after the last region as padding
UINT32 IntelDataEnd = 0;
UINT32 LastRegionOffset = offsets.last();
if (LastRegionOffset == gbeBegin)
IntelDataEnd = gbeEnd;
else if (LastRegionOffset == meBegin)
IntelDataEnd = meEnd;
else if (LastRegionOffset == biosBegin)
IntelDataEnd = biosEnd;
else if (LastRegionOffset == pdrBegin)
IntelDataEnd = pdrEnd;
else if (descriptorVersion == 2 && LastRegionOffset == ecBegin)
IntelDataEnd = ecEnd;
if (IntelDataEnd > (UINT32)intelImage.size()) { // Image file is truncated
msg(tr("parseIntelImage: image size %1 (%2) is smaller than the end of last region %3 (%4), may be damaged")
.hexarg(intelImage.size()).arg(intelImage.size())
.hexarg(IntelDataEnd).arg(IntelDataEnd), index);
return ERR_TRUNCATED_IMAGE;
}
else if (IntelDataEnd < (UINT32)intelImage.size()) { // Insert padding
QByteArray padding = intelImage.mid(IntelDataEnd);
// Get info
name = tr("Padding");
info = tr("Full size: %1h (%2)")
.hexarg(padding.size()).arg(padding.size());
// Add tree item
model->addItem(Types::Padding, getPaddingType(padding), COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), padding, index);
}
return ERR_SUCCESS;
}
UINT8 FfsEngine::parseGbeRegion(const QByteArray & gbe, QModelIndex & index, const QModelIndex & parent, const UINT8 mode)
{
// Check sanity
if (gbe.isEmpty())
return ERR_EMPTY_REGION;
// Get info
QString name = tr("GbE region");
const GBE_MAC_ADDRESS* mac = (const GBE_MAC_ADDRESS*)gbe.constData();
const GBE_VERSION* version = (const GBE_VERSION*)(gbe.constData() + GBE_VERSION_OFFSET);
QString info = tr("Full size: %1h (%2)\nMAC: %3:%4:%5:%6:%7:%8\nVersion: %9.%10")
.hexarg(gbe.size()).arg(gbe.size())
.hexarg2(mac->vendor[0], 2)
.hexarg2(mac->vendor[1], 2)
.hexarg2(mac->vendor[2], 2)
.hexarg2(mac->device[0], 2)
.hexarg2(mac->device[1], 2)
.hexarg2(mac->device[2], 2)
.arg(version->major)
.arg(version->minor);
// Add tree item
index = model->addItem(Types::Region, Subtypes::GbeRegion, COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), gbe, parent, mode);
return ERR_SUCCESS;
}
UINT8 FfsEngine::parseMeRegion(const QByteArray & me, QModelIndex & index, const QModelIndex & parent, const UINT8 mode)
{
// Check sanity
if (me.isEmpty())
return ERR_EMPTY_REGION;
// Get info
QString name = tr("ME region");
QString info = tr("Full size: %1h (%2)").
hexarg(me.size()).arg(me.size());
// Parse region
bool versionFound = true;
bool emptyRegion = false;
// Check for empty region
if (me.count() == me.count('\xFF') || me.count() == me.count('\x00')) {
// Further parsing not needed
emptyRegion = true;
info += tr("\nState: empty");
}
else {
// Search for new signature
INT32 versionOffset = me.indexOf(ME_VERSION_SIGNATURE2);
if (versionOffset < 0){ // New signature not found
// Search for old signature
versionOffset = me.indexOf(ME_VERSION_SIGNATURE);
if (versionOffset < 0){
info += tr("\nVersion: unknown");
versionFound = false;
}
}
// Add version information
if (versionFound) {
const ME_VERSION* version = (const ME_VERSION*)(me.constData() + versionOffset);
info += tr("\nVersion: %1.%2.%3.%4")
.arg(version->major)
.arg(version->minor)
.arg(version->bugfix)
.arg(version->build);
}
}
// Add tree item
index = model->addItem(Types::Region, Subtypes::MeRegion, COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), me, parent, mode);
// Show messages
if (emptyRegion) {
msg(tr("parseRegion: ME region is empty"), index);
}
else if (!versionFound) {
msg(tr("parseRegion: ME region version is unknown, it can be damaged"), index);
}
return ERR_SUCCESS;
}
UINT8 FfsEngine::parsePdrRegion(const QByteArray & pdr, QModelIndex & index, const QModelIndex & parent, const UINT8 mode)
{
// Check sanity
if (pdr.isEmpty())
return ERR_EMPTY_REGION;
// Get info
QString name = tr("PDR region");
QString info = tr("Full size: %1h (%2)").
hexarg(pdr.size()).arg(pdr.size());
// Add tree item
index = model->addItem(Types::Region, Subtypes::PdrRegion, COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), pdr, parent, mode);
// Parse PDR region as BIOS space
UINT8 result = parseBios(pdr, index);
if (result && result != ERR_VOLUMES_NOT_FOUND && result != ERR_INVALID_VOLUME)
return result;
return ERR_SUCCESS;
}
UINT8 FfsEngine::parseEcRegion(const QByteArray & ec, QModelIndex & index, const QModelIndex & parent, const UINT8 mode)
{
// Check sanity
if (ec.isEmpty())
return ERR_EMPTY_REGION;
// Get info
QString name = tr("EC region");
QString info = tr("Full size: %1h (%2)").
hexarg(ec.size()).arg(ec.size());
// Add tree item
index = model->addItem(Types::Region, Subtypes::EcRegion, COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), ec, parent, mode);
return ERR_SUCCESS;
}
UINT8 FfsEngine::parseBiosRegion(const QByteArray & bios, QModelIndex & index, const QModelIndex & parent, const UINT8 mode)
{
if (bios.isEmpty())
return ERR_EMPTY_REGION;
// Get info
QString name = tr("BIOS region");
QString info = tr("Full size: %1h (%2)").
hexarg(bios.size()).arg(bios.size());
// Add tree item
index = model->addItem(Types::Region, Subtypes::BiosRegion, COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), bios, parent, mode);
return parseBios(bios, index);
}
UINT32 FfsEngine::getPaddingType(const QByteArray & padding)
{
if (padding.count('\x00') == padding.count())
return Subtypes::ZeroPadding;
if (padding.count('\xFF') == padding.count())
return Subtypes::OnePadding;
return Subtypes::DataPadding;
}
UINT8 FfsEngine::parseBios(const QByteArray & bios, const QModelIndex & parent)
{
// Search for first volume
UINT32 prevVolumeOffset;
UINT8 result;
result = findNextVolume(bios, 0, prevVolumeOffset);
if (result)
return result;
// First volume is not at the beginning of BIOS space
QString name;
QString info;
if (prevVolumeOffset > 0) {
// Get info
QByteArray padding = bios.left(prevVolumeOffset);
name = tr("Padding");
info = tr("Full size: %1h (%2)")
.hexarg(padding.size()).arg(padding.size());
// Add tree item
model->addItem(Types::Padding, getPaddingType(padding), COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), padding, parent);
}
// Search for and parse all volumes
UINT32 volumeOffset = prevVolumeOffset;
UINT32 prevVolumeSize = 0;
UINT32 volumeSize = 0;
UINT32 bmVolumeSize = 0;
while (true)
{
bool msgAlignmentBitsSet = false;
bool msgUnaligned = false;
bool msgUnknownRevision = false;
bool msgSizeMismach = false;
// Padding between volumes
if (volumeOffset > prevVolumeOffset + prevVolumeSize) {
UINT32 paddingSize = volumeOffset - prevVolumeOffset - prevVolumeSize;
QByteArray padding = bios.mid(prevVolumeOffset + prevVolumeSize, paddingSize);
// Get info
name = tr("Padding");
info = tr("Full size: %1h (%2)")
.hexarg(padding.size()).arg(padding.size());
// Add tree item
model->addItem(Types::Padding, getPaddingType(padding), COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), padding, parent);
}
// Get volume size
result = getVolumeSize(bios, volumeOffset, volumeSize, bmVolumeSize);
if (result) {
msg(tr("parseBios: getVolumeSize failed with error \"%1\"").arg(errorMessage(result)), parent);
return result;
}
// Check that volume is fully present in input
if (volumeSize > (UINT32)bios.size() || volumeOffset + volumeSize > (UINT32)bios.size()) {
msg(tr("parseBios: one of volumes inside overlaps the end of data"), parent);
return ERR_INVALID_VOLUME;
}
// Check reported size against a size calculated using block map
if (volumeSize != bmVolumeSize)
msgSizeMismach = true;
// Check volume revision and alignment
const EFI_FIRMWARE_VOLUME_HEADER* volumeHeader = (const EFI_FIRMWARE_VOLUME_HEADER*)(bios.constData() + volumeOffset);
UINT32 alignment;
if (volumeHeader->Revision == 1) {
// Acquire alignment capability bit
bool alignmentCap = volumeHeader->Attributes & EFI_FVB_ALIGNMENT_CAP;
if (!alignmentCap) {
if (volumeHeader->Attributes & 0xFFFF0000)
msgAlignmentBitsSet = true;
}
}
else if (volumeHeader->Revision == 2) {
// Acquire alignment
alignment = (UINT32)(1UL << ((volumeHeader->Attributes & EFI_FVB2_ALIGNMENT) >> 16));
// Check alignment
if (volumeOffset % alignment)
msgUnaligned = true;
}
else
msgUnknownRevision = true;
// Parse volume
QModelIndex index;
UINT8 result = parseVolume(bios.mid(volumeOffset, volumeSize), index, parent);
if (result)
msg(tr("parseBios: volume parsing failed with error \"%1\"").arg(errorMessage(result)), parent);
// Show messages
if (msgAlignmentBitsSet)
msg("parseBios: alignment bits set on volume without alignment capability", index);
if (msgUnaligned)
msg(tr("parseBios: unaligned revision 2 volume"), index);
if (msgUnknownRevision)
msg(tr("parseBios: unknown volume revision %1").arg(volumeHeader->Revision), index);
if (msgSizeMismach)
msg(tr("parseBios: volume size stored in header %1h differs from calculated using block map %2h")
.hexarg(volumeSize).arg(bmVolumeSize),
index);
// Go to next volume
prevVolumeOffset = volumeOffset;
prevVolumeSize = volumeSize;
result = findNextVolume(bios, volumeOffset + prevVolumeSize, volumeOffset);
if (result) {
UINT32 endPaddingSize = bios.size() - prevVolumeOffset - prevVolumeSize;
// Padding at the end of BIOS space
if (endPaddingSize > 0) {
QByteArray padding = bios.right(endPaddingSize);
// Get info
name = tr("Padding");
info = tr("Full size: %1h (%2)")
.hexarg(padding.size()).arg(padding.size());
// Add tree item
model->addItem(Types::Padding, getPaddingType(padding), COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), padding, parent);
}
break;
}
}
return ERR_SUCCESS;
}
UINT8 FfsEngine::findNextVolume(const QByteArray & bios, UINT32 volumeOffset, UINT32 & nextVolumeOffset)
{
int nextIndex = bios.indexOf(EFI_FV_SIGNATURE, volumeOffset);
if (nextIndex < EFI_FV_SIGNATURE_OFFSET) {
return ERR_VOLUMES_NOT_FOUND;
}
nextVolumeOffset = nextIndex - EFI_FV_SIGNATURE_OFFSET;
return ERR_SUCCESS;
}
UINT8 FfsEngine::getVolumeSize(const QByteArray & bios, UINT32 volumeOffset, UINT32 & volumeSize, UINT32 & bmVolumeSize)
{
// Check that there is space for the volume header and at least two block map entries.
if ((UINT32)bios.size() < volumeOffset + sizeof(EFI_FIRMWARE_VOLUME_HEADER) + 2 * sizeof(EFI_FV_BLOCK_MAP_ENTRY))
return ERR_INVALID_VOLUME;
// Populate volume header
const EFI_FIRMWARE_VOLUME_HEADER* volumeHeader = (const EFI_FIRMWARE_VOLUME_HEADER*)(bios.constData() + volumeOffset);
// Check volume signature
if (QByteArray((const char*)&volumeHeader->Signature, sizeof(volumeHeader->Signature)) != EFI_FV_SIGNATURE)
return ERR_INVALID_VOLUME;
// Calculate volume size using BlockMap
const EFI_FV_BLOCK_MAP_ENTRY* entry = (const EFI_FV_BLOCK_MAP_ENTRY*)(bios.constData() + volumeOffset + sizeof(EFI_FIRMWARE_VOLUME_HEADER));
UINT32 calcVolumeSize = 0;
while (entry->NumBlocks != 0 && entry->Length != 0) {
if ((void*)entry > bios.constData() + bios.size())
return ERR_INVALID_VOLUME;
calcVolumeSize += entry->NumBlocks * entry->Length;
entry += 1;
}
volumeSize = volumeHeader->FvLength;
bmVolumeSize = calcVolumeSize;
if (volumeSize == 0)
return ERR_INVALID_VOLUME;
return ERR_SUCCESS;
}
UINT8 FfsEngine::parseVolume(const QByteArray & volume, QModelIndex & index, const QModelIndex & parent, const UINT8 mode)
{
// Check that there is space for the volume header
if ((UINT32)volume.size() < sizeof(EFI_FIRMWARE_VOLUME_HEADER)) {
msg(tr("parseVolume: input volume size %1h (%2) is smaller than volume header size 40h (64)").hexarg(volume.size()).arg(volume.size()));
return ERR_INVALID_VOLUME;
}
// Populate volume header
const EFI_FIRMWARE_VOLUME_HEADER* volumeHeader = (const EFI_FIRMWARE_VOLUME_HEADER*)(volume.constData());
// Check sanity of HeaderLength value
if (ALIGN8(volumeHeader->HeaderLength) > volume.size()) {
msg(tr("parseVolume: volume header overlaps the end of data"));
return ERR_INVALID_VOLUME;
}
// Check sanity of ExtHeaderOffset value
if (volumeHeader->ExtHeaderOffset > 0
&& (UINT32)volume.size() < ALIGN8(volumeHeader->ExtHeaderOffset + sizeof(EFI_FIRMWARE_VOLUME_EXT_HEADER))) {
msg(tr("parseVolume: extended volume header overlaps the end of data"));
return ERR_INVALID_VOLUME;
}
// Calculate volume header size
UINT32 headerSize;
if (volumeHeader->Revision > 1 && volumeHeader->ExtHeaderOffset) {
const EFI_FIRMWARE_VOLUME_EXT_HEADER* extendedHeader = (const EFI_FIRMWARE_VOLUME_EXT_HEADER*)(volume.constData() + volumeHeader->ExtHeaderOffset);
headerSize = volumeHeader->ExtHeaderOffset + extendedHeader->ExtHeaderSize;
}
else
headerSize = volumeHeader->HeaderLength;
// Sanity check after some crazy MSI images
headerSize = ALIGN8(headerSize);
// Check for FFS v2/v3 volume
UINT8 subtype = Subtypes::UnknownVolume;
if (FFSv2Volumes.contains(QByteArray::fromRawData((const char*)volumeHeader->FileSystemGuid.Data, sizeof(EFI_GUID)))){
subtype = Subtypes::Ffs2Volume;
}
else if (FFSv3Volumes.contains(QByteArray::fromRawData((const char*)volumeHeader->FileSystemGuid.Data, sizeof(EFI_GUID)))) {
subtype = Subtypes::Ffs3Volume;