/* ffsengine.cpp Copyright (c) 2013, 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 #include "ffsengine.h" #include "treeitem.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" FfsEngine::FfsEngine(QObject *parent) : QObject(parent) { rootItem = new TreeItem(TreeItem::Root); rootItem->setName("Name"); rootItem->setTypeName("Type"); rootItem->setSubtypeName("Subtype"); rootItem->setText("Text"); treeModel = new TreeModel(rootItem); } FfsEngine::~FfsEngine(void) { delete treeModel; delete rootItem; } TreeModel* FfsEngine::model() const { return treeModel; } void FfsEngine::msg(const QString & message, const QModelIndex index) { messageItems.enqueue(MessageListItem(message, NULL, 0, index)); } QQueue FfsEngine::message() { return messageItems; } QModelIndex FfsEngine::findParentOfType(UINT8 type, const QModelIndex& index) const { if(!index.isValid()) return QModelIndex(); TreeItem *item; QModelIndex parent = index; for(item = static_cast(parent.internalPointer()); item != NULL && item != rootItem && item->type() != type; item = static_cast(parent.internalPointer())) parent = parent.parent(); if (item != NULL && item != rootItem) return parent; return QModelIndex(); } 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::parseInputFile(const QByteArray & buffer) { UINT32 capsuleHeaderSize = 0; FLASH_DESCRIPTOR_HEADER* descriptorHeader = NULL; QModelIndex index; QByteArray flashImage; // Check buffer size to be more or equal then sizeof(EFI_CAPSULE_HEADER) if (buffer.size() <= sizeof(EFI_CAPSULE_HEADER)) { msg(tr("parseInputFile: Input file is smaller then minimum size of %1 bytes").arg(sizeof(EFI_CAPSULE_HEADER))); return ERR_INVALID_PARAMETER; } // Check buffer for being normal EFI capsule header if (buffer.startsWith(EFI_CAPSULE_GUID)) { // Get info EFI_CAPSULE_HEADER* capsuleHeader = (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("Header size: %1\nFlags: %2\nImage size: %3") .arg(capsuleHeader->HeaderSize, 8, 16, QChar('0')) .arg(capsuleHeader->Flags, 8, 16, QChar('0')) .arg(capsuleHeader->CapsuleImageSize, 8, 16, QChar('0')); // Add tree item index = treeModel->addItem(TreeItem::Capsule, TreeItem::UefiCapsule, COMPRESSION_ALGORITHM_NONE, name, "", info, header, body); } // Check buffer for being extended Aptio capsule header else if (buffer.startsWith(APTIO_CAPSULE_GUID)) { // Get info APTIO_CAPSULE_HEADER* aptioCapsuleHeader = (APTIO_CAPSULE_HEADER*) buffer.constData(); capsuleHeaderSize = aptioCapsuleHeader->RomImageOffset; QByteArray header = buffer.left(capsuleHeaderSize); QByteArray body = buffer.right(buffer.size() - capsuleHeaderSize); QString name = tr("AMI Aptio capsule"); QString info = tr("Header size: %1\nFlags: %2\nImage size: %3") .arg(aptioCapsuleHeader->RomImageOffset, 4, 16, QChar('0')) .arg(aptioCapsuleHeader->CapsuleHeader.Flags, 8, 16, QChar('0')) .arg(aptioCapsuleHeader->CapsuleHeader.CapsuleImageSize - aptioCapsuleHeader->RomImageOffset, 8, 16, QChar('0')); //!TODO: more info about Aptio capsule // Add tree item index = treeModel->addItem(TreeItem::Capsule, TreeItem::AptioCapsule, COMPRESSION_ALGORITHM_NONE, name, "", info, header, body); } // Skip capsule header to have flash chip image flashImage = buffer.right(buffer.size() - capsuleHeaderSize); // Check for Intel flash descriptor presence descriptorHeader = (FLASH_DESCRIPTOR_HEADER*) flashImage.constData(); // Check descriptor signature UINT8 result; if (descriptorHeader->Signature == FLASH_DESCRIPTOR_SIGNATURE) { // Parse as Intel image result = parseIntelImage(flashImage, index); if (result != ERR_INVALID_FLASH_DESCRIPTOR) return result; } // Get info QString name = tr("BIOS image"); QString info = tr("Size: %1") .arg(flashImage.size(), 8, 16, QChar('0')); // Add tree item index = treeModel->addItem(TreeItem::Image, TreeItem::BiosImage, COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), flashImage, QByteArray(), index); return parseBios(flashImage, index); } UINT8 FfsEngine::parseIntelImage(const QByteArray & flashImage, const QModelIndex & parent) { FLASH_DESCRIPTOR_MAP* descriptorMap; FLASH_DESCRIPTOR_REGION_SECTION* regionSection; FLASH_DESCRIPTOR_COMPONENT_SECTION* componentSection; // Store the beginning of descriptor as descriptor base address UINT8* descriptor = (UINT8*) flashImage.constData(); UINT32 descriptorBegin = 0; UINT32 descriptorEnd = FLASH_DESCRIPTOR_SIZE; // Check for buffer size to be greater or equal to descriptor region size if (flashImage.size() < FLASH_DESCRIPTOR_SIZE) { msg(tr("parseInputFile: Input file is smaller then minimum descriptor size of %1 bytes").arg(FLASH_DESCRIPTOR_SIZE)); return ERR_INVALID_FLASH_DESCRIPTOR; } // Parse descriptor map descriptorMap = (FLASH_DESCRIPTOR_MAP*) (descriptor + sizeof(FLASH_DESCRIPTOR_HEADER)); regionSection = (FLASH_DESCRIPTOR_REGION_SECTION*) calculateAddress8(descriptor, descriptorMap->RegionBase); componentSection = (FLASH_DESCRIPTOR_COMPONENT_SECTION*) calculateAddress8(descriptor, descriptorMap->ComponentBase); // GbE region QByteArray gbe; UINT32 gbeBegin = 0; UINT32 gbeEnd = 0; if (regionSection->GbeLimit) { gbeBegin = calculateRegionOffset(regionSection->GbeBase); gbeEnd = calculateRegionSize(regionSection->GbeBase, regionSection->GbeLimit); gbe = flashImage.mid(gbeBegin, gbeEnd); gbeEnd += gbeBegin; } // ME region QByteArray me; UINT32 meBegin = 0; UINT32 meEnd = 0; if (regionSection->MeLimit) { meBegin = calculateRegionOffset(regionSection->MeBase); meEnd = calculateRegionSize(regionSection->MeBase, regionSection->MeLimit); me = flashImage.mid(meBegin, meEnd); meEnd += meBegin; } // PDR region QByteArray pdr; UINT32 pdrBegin = 0; UINT32 pdrEnd = 0; if (regionSection->PdrLimit) { pdrBegin = calculateRegionOffset(regionSection->PdrBase); pdrEnd = calculateRegionSize(regionSection->PdrBase, regionSection->PdrLimit); pdr = flashImage.mid(pdrBegin, pdrEnd); pdrEnd += pdrBegin; } // BIOS region QByteArray bios; UINT32 biosBegin = 0; UINT32 biosEnd = 0; if (regionSection->BiosLimit) { biosBegin = calculateRegionOffset(regionSection->BiosBase); biosEnd = calculateRegionSize(regionSection->BiosBase, regionSection->BiosLimit); bios = flashImage.mid(biosBegin, biosEnd); biosEnd += biosBegin; } else { msg(tr("parseInputFile: descriptor parsing failed, BIOS region not found in descriptor")); return ERR_INVALID_FLASH_DESCRIPTOR; } // Check for intersections between regions if (hasIntersection(descriptorBegin, descriptorEnd, gbeBegin, gbeEnd)) { msg(tr("parseInputFile: descriptor parsing failed, descriptor region has intersection with GbE region")); return ERR_INVALID_FLASH_DESCRIPTOR; } if (hasIntersection(descriptorBegin, descriptorEnd, meBegin, meEnd)) { msg(tr("parseInputFile: descriptor parsing failed, descriptor region has intersection with ME region")); return ERR_INVALID_FLASH_DESCRIPTOR; } if (hasIntersection(descriptorBegin, descriptorEnd, biosBegin, biosEnd)) { msg(tr("parseInputFile: descriptor parsing failed, descriptor region has intersection with BIOS region")); return ERR_INVALID_FLASH_DESCRIPTOR; } if (hasIntersection(descriptorBegin, descriptorEnd, pdrBegin, pdrEnd)) { msg(tr("parseInputFile: descriptor parsing failed, descriptor region has intersection with PDR region")); return ERR_INVALID_FLASH_DESCRIPTOR; } if (hasIntersection(gbeBegin, gbeEnd, meBegin, meEnd)) { msg(tr("parseInputFile: descriptor parsing failed, GbE region has intersection with ME region")); return ERR_INVALID_FLASH_DESCRIPTOR; } if (hasIntersection(gbeBegin, gbeEnd, biosBegin, biosEnd)) { msg(tr("parseInputFile: descriptor parsing failed, GbE region has intersection with BIOS region")); return ERR_INVALID_FLASH_DESCRIPTOR; } if (hasIntersection(gbeBegin, gbeEnd, pdrBegin, pdrEnd)) { msg(tr("parseInputFile: descriptor parsing failed, GbE region has intersection with PDR region")); return ERR_INVALID_FLASH_DESCRIPTOR; } if (hasIntersection(meBegin, meEnd, biosBegin, biosEnd)) { msg(tr("parseInputFile: descriptor parsing failed, ME region has intersection with BIOS region")); return ERR_INVALID_FLASH_DESCRIPTOR; } if (hasIntersection(meBegin, meEnd, pdrBegin, pdrEnd)) { msg(tr("parseInputFile: descriptor parsing failed, ME region has intersection with PDR region")); return ERR_INVALID_FLASH_DESCRIPTOR; } if (hasIntersection(biosBegin, biosEnd, pdrBegin, pdrEnd)) { msg(tr("parseInputFile: descriptor parsing failed, BIOS region has intersection with PDR region")); return ERR_INVALID_FLASH_DESCRIPTOR; } // Region map is consistent QByteArray body; QString name; QString info; // Intel image name = tr("Intel image"); info = tr("Size: %1\nFlash chips: %2\nRegions: %3\nMasters: %4\nPCH straps: %5\nPROC straps: %6\nICC table entries: %7") .arg(flashImage.size(), 8, 16, QChar('0')) .arg(descriptorMap->NumberOfFlashChips + 1) // .arg(descriptorMap->NumberOfRegions + 1) // Zero-based numbers in storage .arg(descriptorMap->NumberOfMasters + 1) // .arg(descriptorMap->NumberOfPchStraps) .arg(descriptorMap->NumberOfProcStraps) .arg(descriptorMap->NumberOfIccTableEntries); // Add Intel image tree item QModelIndex index = treeModel->addItem(TreeItem::Image, TreeItem::IntelImage, COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), flashImage, QByteArray(), parent); // Descriptor // Get descriptor info body = flashImage.left(FLASH_DESCRIPTOR_SIZE); name = tr("Descriptor region"); info = tr("Size: %1").arg(FLASH_DESCRIPTOR_SIZE, 4, 16, QChar('0')); // Check regions presence once again QVector offsets; if (regionSection->GbeLimit) { offsets.append(gbeBegin); info += tr("\nGbE region offset: %1").arg(gbeBegin, 8, 16, QChar('0')); } if (regionSection->MeLimit) { offsets.append(meBegin); info += tr("\nME region offset: %1").arg(meBegin, 8, 16, QChar('0')); } if (regionSection->BiosLimit) { offsets.append(biosBegin); info += tr("\nBIOS region offset: %1").arg(biosBegin, 8, 16, QChar('0')); } if (regionSection->PdrLimit) { offsets.append(pdrBegin); info += tr("\nPDR region offset: %1").arg(pdrBegin, 8, 16, QChar('0')); } // Add descriptor tree item treeModel->addItem(TreeItem::Region, TreeItem::DescriptorRegion, COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), body, QByteArray(), index); // Sort regions in ascending order qSort(offsets); // Parse regions UINT8 result; for (int i = 0; i < offsets.count(); i++) { // Parse GbE region if (offsets.at(i) == gbeBegin) { result = parseGbeRegion(gbe, index); } // Parse ME region else if (offsets.at(i) == meBegin) { result = parseMeRegion(me, index); } // Parse BIOS region else if (offsets.at(i) == biosBegin) { result = parseBiosRegion(bios, index); } // Parse PDR region else if (offsets.at(i) == pdrBegin) { result = parsePdrRegion(pdr, index); } if (result) return result; } return ERR_SUCCESS; } UINT8 FfsEngine::parseGbeRegion(const QByteArray & gbe, const QModelIndex & parent) { if (gbe.isEmpty()) return ERR_EMPTY_REGION; // Get info QString name = tr("GbE region"); GBE_MAC* mac = (GBE_MAC*) gbe.constData(); GBE_VERSION* version = (GBE_VERSION*) (gbe.constData() + GBE_VERSION_OFFSET); QString info = tr("Size: %1\nMAC: %2:%3:%4:%5:%6:%7\nVersion: %8.%9") .arg(gbe.size(), 8, 16, QChar('0')) .arg(mac->vendor[0], 2, 16, QChar('0')) .arg(mac->vendor[1], 2, 16, QChar('0')) .arg(mac->vendor[2], 2, 16, QChar('0')) .arg(mac->device[0], 2, 16, QChar('0')) .arg(mac->device[1], 2, 16, QChar('0')) .arg(mac->device[2], 2, 16, QChar('0')) .arg(version->major) .arg(version->minor); // Add tree item treeModel->addItem(TreeItem::Region, TreeItem::GbeRegion, COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), gbe, QByteArray(), parent); return ERR_SUCCESS; } UINT8 FfsEngine::parseMeRegion(const QByteArray & me, const QModelIndex & parent) { if (me.isEmpty()) return ERR_EMPTY_REGION; // Get info QString name = tr("ME region"); QString info = tr("Size: %1"). arg(me.size(), 8, 16, QChar('0')); ME_VERSION* version; UINT32 versionOffset = me.indexOf(ME_VERSION_SIGNATURE); if (versionOffset < 0){ info += tr("\nVersion: unknown"); msg(tr("parseRegion: ME region version is unknown, it can be damaged"), parent); } else { version = (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 treeModel->addItem(TreeItem::Region, TreeItem::MeRegion, COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), me, QByteArray(), parent); return ERR_SUCCESS; } UINT8 FfsEngine::parsePdrRegion(const QByteArray & pdr, const QModelIndex & parent) { if (pdr.isEmpty()) return ERR_EMPTY_REGION; // Get info QString name = tr("PDR region"); QString info = tr("Size: %1"). arg(pdr.size(), 8, 16, QChar('0')); // Add tree item treeModel->addItem(TreeItem::Region, TreeItem::PdrRegion, COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), pdr, QByteArray(), parent); return ERR_SUCCESS; } UINT8 FfsEngine::parseBiosRegion(const QByteArray & bios, const QModelIndex & parent) { if (bios.isEmpty()) return ERR_EMPTY_REGION; // Get info QString name = tr("BIOS region"); QString info = tr("Size: %1"). arg(bios.size(), 8, 16, QChar('0')); // Add tree item QModelIndex index = treeModel->addItem(TreeItem::Region, TreeItem::BiosRegion, COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), bios, QByteArray(), parent); return parseBios(bios, index); } 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("Size: %1") .arg(padding.size(), 8, 16, QChar('0')); // Add tree item treeModel->addItem(TreeItem::Padding, 0, COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), padding, QByteArray(), parent); } // Search for and parse all volumes UINT32 volumeOffset = prevVolumeOffset; UINT32 prevVolumeSize = 0; UINT32 volumeSize = 0; while(true) { // 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("Size: %1") .arg(padding.size(), 8, 16, QChar('0')); // Add tree item treeModel->addItem(TreeItem::Padding, 0, COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), padding, QByteArray(), parent); } // Get volume size result = getVolumeSize(bios, volumeOffset, volumeSize); if (result) return result; //Check that volume is fully present in input if (volumeOffset + volumeSize > (UINT32) bios.size()) { msg(tr("parseBios: Volume overlaps the end of input buffer"), parent); return ERR_INVALID_VOLUME; } // Check volume revision and alignment EFI_FIRMWARE_VOLUME_HEADER* volumeHeader = (EFI_FIRMWARE_VOLUME_HEADER*) (bios.constData() + volumeOffset); UINT32 alignment; if (volumeHeader->Revision == 1) { // Acquire alignment bits bool alignmentCap = volumeHeader->Attributes & EFI_FVB_ALIGNMENT_CAP; bool alignment2 = volumeHeader->Attributes & EFI_FVB_ALIGNMENT_2; bool alignment4 = volumeHeader->Attributes & EFI_FVB_ALIGNMENT_4; bool alignment8 = volumeHeader->Attributes & EFI_FVB_ALIGNMENT_8; bool alignment16 = volumeHeader->Attributes & EFI_FVB_ALIGNMENT_16; bool alignment32 = volumeHeader->Attributes & EFI_FVB_ALIGNMENT_32; bool alignment64 = volumeHeader->Attributes & EFI_FVB_ALIGNMENT_64; bool alignment128 = volumeHeader->Attributes & EFI_FVB_ALIGNMENT_128; bool alignment256 = volumeHeader->Attributes & EFI_FVB_ALIGNMENT_256; bool alignment512 = volumeHeader->Attributes & EFI_FVB_ALIGNMENT_512; bool alignment1k = volumeHeader->Attributes & EFI_FVB_ALIGNMENT_1K; bool alignment2k = volumeHeader->Attributes & EFI_FVB_ALIGNMENT_2K; bool alignment4k = volumeHeader->Attributes & EFI_FVB_ALIGNMENT_4K; bool alignment8k = volumeHeader->Attributes & EFI_FVB_ALIGNMENT_8K; bool alignment16k = volumeHeader->Attributes & EFI_FVB_ALIGNMENT_16K; bool alignment32k = volumeHeader->Attributes & EFI_FVB_ALIGNMENT_32K; bool alignment64k = volumeHeader->Attributes & EFI_FVB_ALIGNMENT_64K; // Check alignment setup if (!alignmentCap && ( alignment2 || alignment4 || alignment8 || alignment16 || alignment32 || alignment64 || alignment128 || alignment256 || alignment512 || alignment1k || alignment2k || alignment4k || alignment8k || alignment16k || alignment32k || alignment64k)) msg("parseBios: Incompatible revision 1 volume alignment setup", parent); // Assume that smaller alignment value consumes greater //!TODO: refactor this code alignment = 0x01; if (alignment2) alignment = 0x02; else if (alignment4) alignment = 0x04; else if (alignment8) alignment = 0x08; else if (alignment16) alignment = 0x10; else if (alignment32) alignment = 0x20; else if (alignment64) alignment = 0x40; else if (alignment128) alignment = 0x80; else if (alignment256) alignment = 0x100; else if (alignment512) alignment = 0x200; else if (alignment1k) alignment = 0x400; else if (alignment2k) alignment = 0x800; else if (alignment4k) alignment = 0x1000; else if (alignment8k) alignment = 0x2000; else if (alignment16k) alignment = 0x4000; else if (alignment32k) alignment = 0x8000; else if (alignment64k) alignment = 0x10000; // Check alignment if (volumeOffset % alignment) { msg(tr("parseBios: Unaligned revision 1 volume"), parent); } } else if (volumeHeader->Revision == 2) { // Acquire alignment alignment = pow(2, (volumeHeader->Attributes & EFI_FVB2_ALIGNMENT) >> 16); // Check alignment if (volumeOffset % alignment) { msg(tr("parseBios: Unaligned revision 2 volume"), parent); } } else msg(tr("parseBios: Unknown volume revision (%1)").arg(volumeHeader->Revision), parent); // Parse volume UINT8 result = parseVolume(bios.mid(volumeOffset, volumeSize), parent); if (result) msg(tr("parseBios: Volume parsing failed (%1)").arg(result), parent); // 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("Size: %2") .arg(padding.size(), 8, 16, QChar('0')); // Add tree item treeModel->addItem(TreeItem::Padding, 0, COMPRESSION_ALGORITHM_NONE, name, "", info, QByteArray(), padding, QByteArray(), 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) { // Populate volume header EFI_FIRMWARE_VOLUME_HEADER* volumeHeader = (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; // Use BlockMap to determine volume size EFI_FV_BLOCK_MAP_ENTRY* entry = (EFI_FV_BLOCK_MAP_ENTRY*) (bios.constData() + volumeOffset + sizeof(EFI_FIRMWARE_VOLUME_HEADER)); volumeSize = 0; while(entry->NumBlocks != 0 && entry->Length != 0) { if ((void*) entry > bios.constData() + bios.size()) { return ERR_INVALID_VOLUME; } volumeSize += entry->NumBlocks * entry->Length; entry += 1; } return ERR_SUCCESS; } UINT8 FfsEngine::parseVolume(const QByteArray & volume, const QModelIndex & parent, const UINT8 mode) { // Populate volume header EFI_FIRMWARE_VOLUME_HEADER* volumeHeader = (EFI_FIRMWARE_VOLUME_HEADER*) (volume.constData()); // Check filesystem GUID to be known // Do not parse volume with unknown FFS, because parsing will fail bool parseCurrentVolume = true; // FFS GUID v1 if (QByteArray((const char*) &volumeHeader->FileSystemGuid, sizeof(EFI_GUID)) == EFI_FIRMWARE_FILE_SYSTEM_GUID) { // Code can be added here } // FFS GUID v2 else if (QByteArray((const char*) &volumeHeader->FileSystemGuid, sizeof(EFI_GUID)) == EFI_FIRMWARE_FILE_SYSTEM2_GUID) { // Code can be added here } // Other GUID else { msg(tr("parseBios: Unknown file system (%1)").arg(guidToQString(volumeHeader->FileSystemGuid)), parent); parseCurrentVolume = false; } // Check attributes // Determine value of empty byte char empty = volumeHeader->Attributes & EFI_FVB_ERASE_POLARITY ? '\xFF' : '\x00'; // Check header checksum by recalculating it if (calculateChecksum16((UINT16*) volumeHeader, volumeHeader->HeaderLength)) { msg(tr("parseBios: Volume header checksum is invalid"), parent); } // Check for presence of extended header, only if header revision is greater then 1 UINT32 headerSize; if (volumeHeader->Revision > 1 && volumeHeader->ExtHeaderOffset) { EFI_FIRMWARE_VOLUME_EXT_HEADER* extendedHeader = (EFI_FIRMWARE_VOLUME_EXT_HEADER*) ((UINT8*) volumeHeader + volumeHeader->ExtHeaderOffset); headerSize = volumeHeader->ExtHeaderOffset + extendedHeader->ExtHeaderSize; } else { headerSize = volumeHeader->HeaderLength; } // Get volume size UINT8 result; UINT32 volumeSize; result = getVolumeSize(volume, 0, volumeSize); if (result) return result; // Check reported size if (volumeSize != volumeHeader->FvLength) { msg(tr("%1: volume size stored in header %2 differs from calculated size %3") .arg(guidToQString(volumeHeader->FileSystemGuid)) .arg(volumeHeader->FvLength, 8, 16, QChar('0')) .arg(volumeSize, 8, 16, QChar('0')), parent); } // Get info QString name = guidToQString(volumeHeader->FileSystemGuid); QString info = tr("Size: %1\nRevision: %2\nAttributes: %3\nHeader size: %4") .arg(volumeSize, 8, 16, QChar('0')) .arg(volumeHeader->Revision) .arg(volumeHeader->Attributes, 8, 16, QChar('0')) .arg(volumeHeader->HeaderLength, 4, 16, QChar('0')); // Add tree item QByteArray header = volume.left(headerSize); QByteArray body = volume.mid(headerSize, volumeSize - headerSize); QModelIndex index = treeModel->addItem(TreeItem::Volume, 0, COMPRESSION_ALGORITHM_NONE, name, "", info, header, body, QByteArray(), parent, mode); // Do not parse volumes with unknown FS if (!parseCurrentVolume) return ERR_SUCCESS; // Search for and parse all files UINT32 fileOffset = headerSize; UINT32 fileSize; QQueue files; while (true) { result = getFileSize(volume, fileOffset, fileSize); if (result) return result; // Check file size to be at least sizeof(EFI_FFS_FILE_HEADER) if (fileSize < sizeof(EFI_FFS_FILE_HEADER)) { msg(tr("parseVolume: File with invalid size"), index); return ERR_INVALID_FILE; } QByteArray file = volume.mid(fileOffset, fileSize); QByteArray header = file.left(sizeof(EFI_FFS_FILE_HEADER)); // If we are at empty space in the end of volume if (header.count(empty) == header.size()) break; // Exit from loop // Check file alignment EFI_FFS_FILE_HEADER* fileHeader = (EFI_FFS_FILE_HEADER*) header.constData(); UINT8 alignmentPower = ffsAlignmentTable[(fileHeader->Attributes & FFS_ATTRIB_DATA_ALIGNMENT) >> 3]; UINT32 alignment = pow(2, alignmentPower); if ((fileOffset + sizeof(EFI_FFS_FILE_HEADER)) % alignment) { msg(tr("parseVolume: %1, unaligned file").arg(guidToQString(fileHeader->Name)), index); } // Check file GUID if (fileHeader->Type != EFI_FV_FILETYPE_PAD && files.indexOf(header.left(sizeof(EFI_GUID))) != -1) msg(tr("%1: file with duplicate GUID").arg(guidToQString(fileHeader->Name)), index); // Add file GUID to queue files.enqueue(header.left(sizeof(EFI_GUID))); // Parse file result = parseFile(file, volumeHeader->Revision, empty, index); if (result) msg(tr("parseVolume: Parse FFS file failed (%1)").arg(result), index); // Move to next file fileOffset += fileSize; fileOffset = ALIGN8(fileOffset); // Exit from loop if no files left if (fileOffset >= (UINT32) volume.size()) break; } return ERR_SUCCESS; } UINT8 FfsEngine::getFileSize(const QByteArray & volume, const UINT32 fileOffset, UINT32 & fileSize) { EFI_FFS_FILE_HEADER* fileHeader = (EFI_FFS_FILE_HEADER*) (volume.constData() + fileOffset); fileSize = uint24ToUint32(fileHeader->Size); return ERR_SUCCESS; } UINT8 FfsEngine::parseFile(const QByteArray & file, UINT8 revision, const UINT8 erasePolarity, const QModelIndex & parent, const UINT8 mode) { // Populate file header EFI_FFS_FILE_HEADER* fileHeader = (EFI_FFS_FILE_HEADER*) file.constData(); // Check file state // Determine file erase polarity bool fileErasePolarity = fileHeader->State | EFI_FILE_ERASE_POLARITY; // Check file erase polarity to be the same as parent erase polarity if (erasePolarity != ERASE_POLARITY_UNKNOWN && (bool) erasePolarity != fileErasePolarity) { msg(tr("parseFile: %1, erase polarity differs from parent erase polarity"), parent); } // Construct empty byte for this file char empty = fileErasePolarity ? '\xFF' : '\x00'; // Check header checksum QByteArray header = file.left(sizeof(EFI_FFS_FILE_HEADER)); QByteArray tempHeader = header; EFI_FFS_FILE_HEADER* tempFileHeader = (EFI_FFS_FILE_HEADER*) (tempHeader.data()); tempFileHeader->IntegrityCheck.Checksum.Header = 0; tempFileHeader->IntegrityCheck.Checksum.File = 0; UINT8 calculated = calculateChecksum8((UINT8*) tempFileHeader, sizeof(EFI_FFS_FILE_HEADER) - 1); if (fileHeader->IntegrityCheck.Checksum.Header != calculated) { msg(tr("parseFile: %1, stored header checksum %2 differs from calculated %3") .arg(guidToQString(fileHeader->Name)) .arg(fileHeader->IntegrityCheck.Checksum.Header, 2, 16, QChar('0')) .arg(calculated, 2, 16, QChar('0')), parent); } // Check data checksum // Data checksum must be calculated if (fileHeader->Attributes & FFS_ATTRIB_CHECKSUM) { UINT32 bufferSize = file.size() - sizeof(EFI_FFS_FILE_HEADER); // Exclude file tail from data checksum calculation if(revision == 1 && fileHeader->Attributes & FFS_ATTRIB_TAIL_PRESENT) bufferSize -= sizeof(UINT16); calculated = calculateChecksum8((UINT8*)(file.constData() + sizeof(EFI_FFS_FILE_HEADER)), bufferSize); if (fileHeader->IntegrityCheck.Checksum.File != calculated) { msg(tr("parseFile: %1, stored data checksum %2 differs from calculated %3") .arg(guidToQString(fileHeader->Name)) .arg(fileHeader->IntegrityCheck.Checksum.File, 2, 16, QChar('0')) .arg(calculated, 2, 16, QChar('0')), parent); } } // Data checksum must be one of predefined values else { if (fileHeader->IntegrityCheck.Checksum.File != FFS_FIXED_CHECKSUM && fileHeader->IntegrityCheck.Checksum.File != FFS_FIXED_CHECKSUM2) { msg(tr("parseVolume: %1, stored data checksum %2 differs from standard value") .arg(guidToQString(fileHeader->Name)) .arg(fileHeader->IntegrityCheck.Checksum.File, 2, 16, QChar('0')), parent); } } // Get file body QByteArray body = file.right(file.size() - sizeof(EFI_FFS_FILE_HEADER)); // For files in Revision 1 volumes, check for file tail presence QByteArray tail; if (revision == 1 && fileHeader->Attributes & FFS_ATTRIB_TAIL_PRESENT) { //Check file tail; tail = body.right(sizeof(UINT16)); if (!fileHeader->IntegrityCheck.TailReference == *(UINT16*)tail.constData()) msg(tr("parseFile: %1, file tail value %2 is not a bitwise not of %3 stored in file header") .arg(guidToQString(fileHeader->Name)) .arg(*tail, 4, 16, QChar('0')) .arg(fileHeader->IntegrityCheck.TailReference, 4, 16, QChar('0')), parent); // Remove tail from file body body = body.left(body.size() - sizeof(UINT16)); } // Parse current file by default bool parseCurrentFile = true; bool parseAsBios = false; // Check file type //!TODO: add more file specific checks switch (fileHeader->Type) { case EFI_FV_FILETYPE_ALL: parseAsBios = true; break; case EFI_FV_FILETYPE_RAW: parseAsBios = true; break; case EFI_FV_FILETYPE_FREEFORM: break; case EFI_FV_FILETYPE_SECURITY_CORE: break; case EFI_FV_FILETYPE_PEI_CORE: break; case EFI_FV_FILETYPE_DXE_CORE: break; case EFI_FV_FILETYPE_PEIM: break; case EFI_FV_FILETYPE_DRIVER: break; case EFI_FV_FILETYPE_COMBINED_PEIM_DRIVER: break; case EFI_FV_FILETYPE_APPLICATION: break; case EFI_FV_FILETYPE_SMM: break; case EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE: break; case EFI_FV_FILETYPE_COMBINED_SMM_DXE: break; case EFI_FV_FILETYPE_SMM_CORE: break; case EFI_FV_FILETYPE_PAD: parseCurrentFile = false; break; default: parseCurrentFile = false; msg(tr("parseFile: Unknown file type (%1)").arg(fileHeader->Type, 2, 16, QChar('0')), parent); }; // Check for empty file if (body.count(empty) == body.size()) { // No need to parse empty files parseCurrentFile = false; } // Get info QString name; QString info; if (fileHeader->Type != EFI_FV_FILETYPE_PAD) name = guidToQString(fileHeader->Name); else name = tr("Padding"); info = tr("Type: %1\nAttributes: %2\nSize: %3\nState: %4") .arg(fileHeader->Type, 2, 16, QChar('0')) .arg(fileHeader->Attributes, 2, 16, QChar('0')) .arg(uint24ToUint32(fileHeader->Size), 6, 16, QChar('0')) .arg(fileHeader->State, 2, 16, QChar('0')); // Add tree item QModelIndex index = treeModel->addItem(TreeItem::File, fileHeader->Type, COMPRESSION_ALGORITHM_NONE, name, "", info, header, body, tail, parent, mode); if (!parseCurrentFile) return ERR_SUCCESS; // Parse file as BIOS space UINT8 result; if (parseAsBios) { result = parseBios(body, index); if (result && result != ERR_VOLUMES_NOT_FOUND) msg(tr("parseFile: Parse file as BIOS failed (%1)").arg(result), index); return ERR_SUCCESS; } // Parse sections result = parseSections(body, index); if (result) return result; return ERR_SUCCESS; } UINT8 FfsEngine::getSectionSize(const QByteArray & file, const UINT32 sectionOffset, UINT32 & sectionSize) { EFI_COMMON_SECTION_HEADER* sectionHeader = (EFI_COMMON_SECTION_HEADER*) (file.constData() + sectionOffset); sectionSize = uint24ToUint32(sectionHeader->Size); return ERR_SUCCESS; } UINT8 FfsEngine::parseSections(const QByteArray & body, const QModelIndex & parent) { // Search for and parse all sections UINT32 sectionOffset = 0; UINT32 sectionSize; UINT32 bodySize = body.size(); UINT8 result; while (true) { // Get section size result = getSectionSize(body, sectionOffset, sectionSize); if (result) return result; // Parse section result = parseSection(body.mid(sectionOffset, sectionSize), parent); if (result) return result; // Move to next section sectionOffset += sectionSize; sectionOffset = ALIGN4(sectionOffset); // Exit from loop if no sections left if (sectionOffset >= bodySize) break; } return ERR_SUCCESS; } UINT8 FfsEngine::parseSection(const QByteArray & section, const QModelIndex & parent, const UINT8 mode) { EFI_COMMON_SECTION_HEADER* sectionHeader = (EFI_COMMON_SECTION_HEADER*) (section.constData()); UINT32 sectionSize = uint24ToUint32(sectionHeader->Size); QString name = sectionTypeToQString(sectionHeader->Type) + tr(" section"); QString info; QByteArray header; QByteArray body; UINT32 headerSize; UINT8 result; QModelIndex index; switch (sectionHeader->Type) { // Encapsulated sections case EFI_SECTION_COMPRESSION: { bool parseCurrentSection = true; QByteArray decompressed; UINT8 algorithm; EFI_COMPRESSION_SECTION* compressedSectionHeader = (EFI_COMPRESSION_SECTION*) sectionHeader; header = section.left(sizeof(EFI_COMPRESSION_SECTION)); body = section.mid(sizeof(EFI_COMPRESSION_SECTION), sectionSize - sizeof(EFI_COMPRESSION_SECTION)); algorithm = COMPRESSION_ALGORITHM_UNKNOWN; // Decompress section result = decompress(body, compressedSectionHeader->CompressionType, decompressed, &algorithm); if (result) { msg(tr("parseSection: Section decompression failed (%1)").arg(result), parent); parseCurrentSection = false; } // Get info info = tr("Type: %1\nSize: %2\nCompression type: %3\nDecompressed size: %4") .arg(sectionHeader->Type, 2, 16, QChar('0')) .arg(body.size(), 8, 16, QChar('0')) .arg(compressionTypeToQString(algorithm)) .arg(compressedSectionHeader->UncompressedLength, 8, 16, QChar('0')); // Add tree item index = treeModel->addItem(TreeItem::Section, sectionHeader->Type, algorithm, name, "", info, header, body, QByteArray(), parent, mode); // Parse decompressed data if (parseCurrentSection) { result = parseSections(decompressed, index); if (result) return result; } } break; case EFI_SECTION_GUID_DEFINED: { bool parseCurrentSection = true; EFI_GUID_DEFINED_SECTION* guidDefinedSectionHeader; header = section.left(sizeof(EFI_GUID_DEFINED_SECTION)); guidDefinedSectionHeader = (EFI_GUID_DEFINED_SECTION*) (header.constData()); header = section.left(guidDefinedSectionHeader->DataOffset); guidDefinedSectionHeader = (EFI_GUID_DEFINED_SECTION*) (header.constData()); body = section.mid(guidDefinedSectionHeader->DataOffset, sectionSize - guidDefinedSectionHeader->DataOffset); QByteArray decompressed = body; UINT8 algorithm = COMPRESSION_ALGORITHM_NONE; // Check if section requires processing if (guidDefinedSectionHeader->Attributes & EFI_GUIDED_SECTION_PROCESSING_REQUIRED) { // Try to decompress section body using both known compression algorithms algorithm = COMPRESSION_ALGORITHM_UNKNOWN; // Tiano result = decompress(body, EFI_STANDARD_COMPRESSION, decompressed, &algorithm); if (result) { result = decompress(body, EFI_CUSTOMIZED_COMPRESSION, decompressed, &algorithm); if (result) { msg(tr("parseSection: GUID defined section can not be decompressed (%1)").arg(result), parent); parseCurrentSection = false; } } } // Get info name = guidToQString(guidDefinedSectionHeader->SectionDefinitionGuid); info = tr("Type: %1\nSize: %2\nData offset: %3\nAttributes: %4\nCompression type: %5") .arg(sectionHeader->Type, 2, 16, QChar('0')) .arg(body.size(), 8, 16, QChar('0')) .arg(guidDefinedSectionHeader->DataOffset, 4, 16, QChar('0')) .arg(guidDefinedSectionHeader->Attributes, 4, 16, QChar('0')) .arg(compressionTypeToQString(algorithm)); // Add tree item index = treeModel->addItem(TreeItem::Section, sectionHeader->Type, algorithm, name, "", info, header, body, QByteArray(), parent, mode); // Parse decompressed data if (parseCurrentSection) { result = parseSections(decompressed, index); if (result) return result; } } break; case EFI_SECTION_DISPOSABLE: { header = section.left(sizeof(EFI_DISPOSABLE_SECTION)); body = section.mid(sizeof(EFI_DISPOSABLE_SECTION), sectionSize - sizeof(EFI_DISPOSABLE_SECTION)); // Get info info = tr("parseSection: %1\nSize: %2") .arg(sectionHeader->Type, 2, 16, QChar('0')) .arg(body.size(), 8, 16, QChar('0')); // Add tree item index = treeModel->addItem(TreeItem::Section, sectionHeader->Type, COMPRESSION_ALGORITHM_NONE, name, "", info, header, body, QByteArray(), parent, mode); // Parse section body result = parseSections(body, index); if (result) return result; } break; // Leaf sections case EFI_SECTION_PE32: case EFI_SECTION_PIC: case EFI_SECTION_TE: case EFI_SECTION_VERSION: case EFI_SECTION_FREEFORM_SUBTYPE_GUID: case EFI_SECTION_DXE_DEPEX: case EFI_SECTION_PEI_DEPEX: case EFI_SECTION_SMM_DEPEX: case EFI_SECTION_COMPATIBILITY16: headerSize = sizeOfSectionHeaderOfType(sectionHeader->Type); header = section.left(headerSize); body = section.mid(headerSize, sectionSize - headerSize); // Get info info = tr("Type: %1\nSize: %2") .arg(sectionHeader->Type, 2, 16, QChar('0')) .arg(body.size(), 8, 16, QChar('0')); // Add tree item index = treeModel->addItem(TreeItem::Section, sectionHeader->Type, COMPRESSION_ALGORITHM_NONE, name, "", info, header, body, QByteArray(), parent, mode); break; case EFI_SECTION_USER_INTERFACE: { header = section.left(sizeof(EFI_USER_INTERFACE_SECTION)); body = section.mid(sizeof(EFI_USER_INTERFACE_SECTION), sectionSize - sizeof(EFI_USER_INTERFACE_SECTION)); // Get info info = tr("Type: %1\nSize: %2") .arg(sectionHeader->Type, 2, 16, QChar('0')) .arg(body.size(), 8, 16, QChar('0')); // Add tree item index = treeModel->addItem(TreeItem::Section, sectionHeader->Type, COMPRESSION_ALGORITHM_NONE, name, "", info, header, body, QByteArray(), parent, mode); // Rename parent file QString text = QString::fromUtf16((const ushort*)body.constData()); treeModel->setItemText(text, findParentOfType(TreeItem::File, parent)); } break; case EFI_SECTION_FIRMWARE_VOLUME_IMAGE: header = section.left(sizeof(EFI_FIRMWARE_VOLUME_IMAGE_SECTION)); body = section.mid(sizeof(EFI_FIRMWARE_VOLUME_IMAGE_SECTION), sectionSize - sizeof(EFI_FIRMWARE_VOLUME_IMAGE_SECTION)); // Get info info = tr("Type: %1\nSize: %2") .arg(sectionHeader->Type, 2, 16, QChar('0')) .arg(body.size(), 8, 16, QChar('0')); // Add tree item index = treeModel->addItem(TreeItem::Section, sectionHeader->Type, COMPRESSION_ALGORITHM_NONE, name, "", info, header, body, QByteArray(), parent, mode); // Parse section body as BIOS space result = parseBios(body, index); if (result && result != ERR_VOLUMES_NOT_FOUND) { msg(tr("parseSection: Firmware volume image can not be parsed as BIOS (%1)").arg(result), index); return result; } break; case EFI_SECTION_RAW: header = section.left(sizeof(EFI_RAW_SECTION)); body = section.mid(sizeof(EFI_RAW_SECTION), sectionSize - sizeof(EFI_RAW_SECTION)); // Get info info = tr("Type: %1\nSize: %2") .arg(sectionHeader->Type, 2, 16, QChar('0')) .arg(body.size(), 8, 16, QChar('0')); // Add tree item index = treeModel->addItem(TreeItem::Section, sectionHeader->Type, COMPRESSION_ALGORITHM_NONE, name, "", info, header, body, QByteArray(), parent, mode); // Parse section body as BIOS space result = parseBios(body, index); if (result && result != ERR_VOLUMES_NOT_FOUND) { msg(tr("parseSection: Raw section can not be parsed as BIOS (%1)").arg(result), index); return result; } break; default: header = section.left(sizeof(EFI_COMMON_SECTION_HEADER)); body = section.mid(sizeof(EFI_COMMON_SECTION_HEADER), sectionSize - sizeof(EFI_COMMON_SECTION_HEADER)); // Get info info = tr("Type: %1\nSize: %2") .arg(sectionHeader->Type, 2, 16, QChar('0')) .arg(body.size(), 8, 16, QChar('0')); // Add tree item index = treeModel->addItem(TreeItem::Section, sectionHeader->Type, COMPRESSION_ALGORITHM_NONE, name, "", info, header, body, QByteArray(), parent, mode); msg(tr("parseSection: Section with unknown type (%1)").arg(sectionHeader->Type, 2, 16, QChar('0')), index); } return ERR_SUCCESS; } // Operations on tree items UINT8 FfsEngine::extract(const QModelIndex & index, QByteArray & extracted, const UINT8 mode) { if (!index.isValid()) return ERR_INVALID_PARAMETER; TreeItem* item = static_cast(index.internalPointer()); if (mode == EXTRACT_MODE_AS_IS) { // Extract as is, with header, body and tail extracted.clear(); extracted.append(item->header()); extracted.append(item->body()); extracted.append(item->tail()); } else if (mode == EXTRACT_MODE_BODY_ONLY) { // Extract without header and tail extracted.clear(); extracted.append(item->body()); } else if (mode == EXTRACT_MODE_UNCOMPRESSED) { // Only possible for files with compressed sections return ERR_NOT_IMPLEMENTED; } else return ERR_UNKNOWN_EXTRACT_MODE; return ERR_SUCCESS; } UINT8 FfsEngine::insert(const QModelIndex & index, const QByteArray & object, const UINT8 type, const UINT8 mode) { if (!index.isValid()) return ERR_INVALID_PARAMETER; // Only files and sections can now be inserted if (type == TreeItem::File) { QModelIndex parent; if (mode == INSERT_MODE_BEFORE || mode == INSERT_MODE_AFTER) parent = index.parent(); else parent = index; // Parent type must be volume TreeItem * parentItem = static_cast(parent.internalPointer()); if (parentItem->type() != TreeItem::Volume) { msg(tr("insert: file can't be inserted into something that is not volume"), parent); return ERR_INVALID_VOLUME; } EFI_FIRMWARE_VOLUME_HEADER* header = (EFI_FIRMWARE_VOLUME_HEADER*) parentItem->header().constData(); // Parse file UINT8 result = parseFile(object, header->Revision, ERASE_POLARITY_UNKNOWN, index, mode); if (result) return result; // Set rebuild action for parent treeModel->setItemAction(TreeItem::Rebuild, parent); } else if (type == TreeItem::Section) { QModelIndex parent; if (mode == INSERT_MODE_BEFORE || mode == INSERT_MODE_AFTER) parent = index.parent(); else parent = index; // Parent type must be file or encapsulation section TreeItem * parentItem = static_cast(parent.internalPointer()); if (parentItem->type() == TreeItem::File || (parentItem->type() == TreeItem::Section && (parentItem->subtype() == EFI_SECTION_COMPRESSION || parentItem->subtype() == EFI_SECTION_GUID_DEFINED || parentItem->subtype() == EFI_SECTION_DISPOSABLE))) { // Parse section UINT8 result = parseSection(object, index, mode); if (result) return result; // Set rebuild action for parent treeModel->setItemAction(TreeItem::Rebuild, parent); } else { msg(tr("insert: section can't be inserted into something that is not file or encapsulation section"), parent); return ERR_INVALID_FILE; } } else return ERR_NOT_IMPLEMENTED; return ERR_SUCCESS; } UINT8 FfsEngine::remove(const QModelIndex & index) { if (!index.isValid()) return ERR_INVALID_PARAMETER; // Set action for the item treeModel->setItemAction(TreeItem::Remove, index); return ERR_SUCCESS; } UINT8 FfsEngine::rebuild(const QModelIndex & index) { if (!index.isValid()) return ERR_INVALID_PARAMETER; // Set action for the item treeModel->setItemAction(TreeItem::Rebuild, index); return ERR_SUCCESS; } UINT8 FfsEngine::changeCompression(const QModelIndex & index, const UINT8 algorithm) { if (!index.isValid()) return ERR_INVALID_PARAMETER; // Set action for the item treeModel->setItemCompression(algorithm, index); return ERR_SUCCESS; } // Compression routines UINT8 FfsEngine::decompress(const QByteArray & compressedData, const UINT8 compressionType, QByteArray & decompressedData, UINT8 * algorithm) { UINT8* data; UINT32 dataSize; UINT8* decompressed; UINT32 decompressedSize = 0; UINT8* scratch; UINT32 scratchSize = 0; EFI_TIANO_HEADER* header; switch (compressionType) { case EFI_NOT_COMPRESSED: decompressedData = compressedData; if (algorithm) *algorithm = COMPRESSION_ALGORITHM_NONE; return ERR_SUCCESS; case EFI_STANDARD_COMPRESSION: // Get buffer sizes data = (UINT8*) compressedData.constData(); dataSize = compressedData.size(); // Check header to be valid header = (EFI_TIANO_HEADER*) data; if (header->CompSize + sizeof(EFI_TIANO_HEADER) != dataSize) return ERR_STANDARD_DECOMPRESSION_FAILED; // Get info function is the same for both algorithms if (ERR_SUCCESS != EfiTianoGetInfo(data, dataSize, &decompressedSize, &scratchSize)) return ERR_STANDARD_DECOMPRESSION_FAILED; // Allocate memory decompressed = new UINT8[decompressedSize]; scratch = new UINT8[scratchSize]; // Decompress section data //!TODO: better check needed // Try EFI1.1 decompression first if (ERR_SUCCESS != EfiDecompress(data, dataSize, decompressed, decompressedSize, scratch, scratchSize)) { // Not EFI 1.1, try Tiano if (ERR_SUCCESS != TianoDecompress(data, dataSize, decompressed, decompressedSize, scratch, scratchSize)) { if (algorithm) *algorithm = COMPRESSION_ALGORITHM_UNKNOWN; return ERR_STANDARD_DECOMPRESSION_FAILED; } else if (algorithm) *algorithm = COMPRESSION_ALGORITHM_TIANO; } else { // Possible EFI 1.1 // Try decompressing it as Tiano UINT8* tianoDecompressed = new UINT8[decompressedSize]; UINT8* tianoScratch = new UINT8[scratchSize]; if (ERR_SUCCESS != TianoDecompress(data, dataSize, tianoDecompressed, decompressedSize, tianoScratch, scratchSize)) { // Not Tiano, definitely EFI 1.1 if (algorithm) *algorithm = COMPRESSION_ALGORITHM_EFI11; } else { // Both algorithms work if(memcmp(decompressed, tianoDecompressed, decompressedSize)) { // If decompressed data are different - it's Tiano for sure delete decompressed; delete scratch; decompressed = tianoDecompressed; scratch = tianoScratch; if (algorithm) *algorithm = COMPRESSION_ALGORITHM_TIANO; } else { // Data are same - it's EFI 1.1 if (algorithm) *algorithm = COMPRESSION_ALGORITHM_EFI11; } } } decompressedData = QByteArray((const char*) decompressed, decompressedSize); // Free allocated memory delete[] decompressed; delete[] scratch; return ERR_SUCCESS; case EFI_CUSTOMIZED_COMPRESSION: // Get buffer sizes data = (UINT8*) compressedData.constData(); dataSize = compressedData.size(); // Get info if (ERR_SUCCESS != LzmaGetInfo(data, dataSize, &decompressedSize)) return ERR_CUSTOMIZED_DECOMPRESSION_FAILED; // Allocate memory decompressed = new UINT8[decompressedSize]; // Decompress section data if (ERR_SUCCESS != LzmaDecompress(data, dataSize, decompressed)) { // Intel modified LZMA workaround EFI_COMMON_SECTION_HEADER* shittySectionHeader; UINT32 shittySectionSize; // Shitty compressed section with a section header between COMPRESSED_SECTION_HEADER and LZMA_HEADER // We must determine section header size by checking it's type before we can unpack that non-standard compressed section shittySectionHeader = (EFI_COMMON_SECTION_HEADER*) data; shittySectionSize = sizeOfSectionHeaderOfType(shittySectionHeader->Type); // Decompress section data once again data += shittySectionSize; // Get info again if (ERR_SUCCESS != LzmaGetInfo(data, dataSize, &decompressedSize)) return ERR_CUSTOMIZED_DECOMPRESSION_FAILED; // Decompress section data again if (ERR_SUCCESS != LzmaDecompress(data, dataSize, decompressed)) { if (algorithm) *algorithm = COMPRESSION_ALGORITHM_UNKNOWN; return ERR_CUSTOMIZED_DECOMPRESSION_FAILED; } else { if (algorithm) *algorithm = COMPRESSION_ALGORITHM_IMLZMA; decompressedData = QByteArray((const char*) decompressed, decompressedSize); } } else { if (algorithm) *algorithm = COMPRESSION_ALGORITHM_LZMA; decompressedData = QByteArray((const char*) decompressed, decompressedSize); } // Free memory delete[] decompressed; return ERR_SUCCESS; default: msg(tr("decompress: Unknown compression type (%1)").arg(compressionType)); if (algorithm) *algorithm = COMPRESSION_ALGORITHM_UNKNOWN; return ERR_UNKNOWN_COMPRESSION_ALGORITHM; } } UINT8 FfsEngine::compress(const QByteArray & data, const UINT8 algorithm, QByteArray & compressedData) { UINT8* compressed; UINT32 compressedSize = 0; switch (algorithm) { case COMPRESSION_ALGORITHM_NONE: { compressedData = data; return ERR_SUCCESS; } break; case COMPRESSION_ALGORITHM_EFI11: { if (EfiCompress((UINT8*) data.constData(), data.size(), NULL, &compressedSize) != ERR_BUFFER_TOO_SMALL) return ERR_STANDARD_COMPRESSION_FAILED; compressed = new UINT8[compressedSize]; if (EfiCompress((UINT8*) data.constData(), data.size(), compressed, &compressedSize) != ERR_SUCCESS) return ERR_STANDARD_COMPRESSION_FAILED; compressedData = QByteArray((const char*) compressed, compressedSize); delete[] compressed; return ERR_SUCCESS; } break; case COMPRESSION_ALGORITHM_TIANO: { if (TianoCompress((UINT8*) data.constData(), data.size(), NULL, &compressedSize) != ERR_BUFFER_TOO_SMALL) return ERR_STANDARD_COMPRESSION_FAILED; compressed = new UINT8[compressedSize]; if (TianoCompress((UINT8*) data.constData(), data.size(), compressed, &compressedSize) != ERR_SUCCESS) return ERR_STANDARD_COMPRESSION_FAILED; compressedData = QByteArray((const char*) compressed, compressedSize); delete[] compressed; return ERR_SUCCESS; } break; case COMPRESSION_ALGORITHM_LZMA: { if (LzmaCompress((UINT8*) data.constData(), data.size(), NULL, &compressedSize) != ERR_BUFFER_TOO_SMALL) return ERR_CUSTOMIZED_COMPRESSION_FAILED; compressed = new UINT8[compressedSize]; if (LzmaCompress((UINT8*) data.constData(), data.size(), compressed, &compressedSize) != ERR_SUCCESS) return ERR_CUSTOMIZED_COMPRESSION_FAILED; compressedData = QByteArray((const char*) compressed, compressedSize); delete[] compressed; return ERR_SUCCESS; } break; case COMPRESSION_ALGORITHM_IMLZMA: { QByteArray header = data.left(sizeof(EFI_COMMON_SECTION_HEADER)); EFI_COMMON_SECTION_HEADER* sectionHeader = (EFI_COMMON_SECTION_HEADER*) header.constData(); UINT32 headerSize = sizeOfSectionHeaderOfType(sectionHeader->Type); header = data.left(headerSize); QByteArray newData = data.mid(headerSize); if (LzmaCompress((UINT8*) newData.constData(), newData.size(), NULL, &compressedSize) != ERR_BUFFER_TOO_SMALL) return ERR_CUSTOMIZED_COMPRESSION_FAILED; compressed = new UINT8[compressedSize]; if (LzmaCompress((UINT8*) newData.constData(), newData.size(), compressed, &compressedSize) != ERR_SUCCESS) return ERR_CUSTOMIZED_COMPRESSION_FAILED; compressedData = header.append(QByteArray((const char*) compressed, compressedSize)); delete[] compressed; return ERR_SUCCESS; } break; default: msg(tr("compress: Unknown compression algorithm (%1)").arg(algorithm)); return ERR_UNKNOWN_COMPRESSION_ALGORITHM; } } // Construction routines UINT8 FfsEngine::reconstructImage(QByteArray & reconstructed) { QQueue queue; UINT8 result = reconstruct(treeModel->index(0,0), queue); if (result) return result; reconstructed.clear(); while (!queue.isEmpty()) reconstructed.append(queue.dequeue()); return ERR_SUCCESS; } UINT8 FfsEngine::constructPadFile(const UINT32 size, const UINT8 revision, const UINT8 erasePolarity, QByteArray & pad) { if (size < sizeof(EFI_FFS_FILE_HEADER) || erasePolarity == ERASE_POLARITY_UNKNOWN) return ERR_INVALID_PARAMETER; pad = QByteArray(size, erasePolarity == ERASE_POLARITY_TRUE ? '\xFF' : '\x00'); EFI_FFS_FILE_HEADER* header = (EFI_FFS_FILE_HEADER*) pad.data(); uint32ToUint24(size, header->Size); header->Attributes = 0x00; header->Type = EFI_FV_FILETYPE_PAD; header->State = EFI_FILE_HEADER_CONSTRUCTION | EFI_FILE_HEADER_VALID | EFI_FILE_DATA_VALID; // Invert state bits if erase polarity is true if (erasePolarity == ERASE_POLARITY_TRUE) header->State = ~header->State; // Calculate header checksum header->IntegrityCheck.Checksum.Header = 0; header->IntegrityCheck.Checksum.File = 0; header->IntegrityCheck.Checksum.Header = calculateChecksum8((UINT8*) header, sizeof(EFI_FFS_FILE_HEADER) - 1); // Set data checksum if (revision == 1) header->IntegrityCheck.Checksum.File = FFS_FIXED_CHECKSUM; else header->IntegrityCheck.Checksum.File = FFS_FIXED_CHECKSUM2; return ERR_SUCCESS; } UINT8 FfsEngine::reconstruct(const QModelIndex & index, QQueue & queue, const UINT8 revision, const UINT8 erasePolarity) { if (!index.isValid()) return ERR_SUCCESS; TreeItem* item = static_cast(index.internalPointer()); if (item == rootItem) return ERR_SUCCESS; QByteArray reconstructed; UINT8 result; // No action is needed, just return header + body if (item->action() == TreeItem::NoAction) { reconstructed = item->header().append(item->body()).append(item->tail()); queue.enqueue(reconstructed); return ERR_SUCCESS; } // Remove item else if (item->action() == TreeItem::Remove) { // Volume can be removed by replacing all it's contents with empty bytes if (item->type() == TreeItem::Volume) { EFI_FIRMWARE_VOLUME_HEADER* volumeHeader = (EFI_FIRMWARE_VOLUME_HEADER*) item->header().constData(); char empty = volumeHeader->Attributes & EFI_FVB_ERASE_POLARITY ? '\xFF' : '\x00'; reconstructed.fill(empty, item->header().size() + item->body().size() + item->tail().size()); queue.enqueue(reconstructed); return ERR_SUCCESS; } // File can be removed if (item->type() == TreeItem::File) // Add nothing to queue return ERR_SUCCESS; // Section can be removed else if (item->type() == TreeItem::Section) // Add nothing to queue return ERR_SUCCESS; // Other item types can't be removed else return ERR_NOT_IMPLEMENTED; } // Reconstruct item and it's children recursive else if (item->action() == TreeItem::Rebuild) { QQueue childrenQueue; switch (item->type()) { case TreeItem::Image: if (item->subtype() == TreeItem::IntelImage) { // Reconstruct Intel image // First child will always be descriptor for this type of image result = reconstruct(index.child(0, index.column()), childrenQueue); if (result) return result; QByteArray descriptor = childrenQueue.dequeue(); reconstructed.append(descriptor); FLASH_DESCRIPTOR_MAP* descriptorMap = (FLASH_DESCRIPTOR_MAP*) (descriptor.constData() + sizeof(FLASH_DESCRIPTOR_HEADER)); FLASH_DESCRIPTOR_REGION_SECTION* regionSection = (FLASH_DESCRIPTOR_REGION_SECTION*) calculateAddress8((UINT8*)descriptor.constData(), descriptorMap->RegionBase); QByteArray gbe; UINT32 gbeBegin = calculateRegionOffset(regionSection->GbeBase); UINT32 gbeEnd = gbeBegin + calculateRegionSize(regionSection->GbeBase, regionSection->GbeLimit); QByteArray me; UINT32 meBegin = calculateRegionOffset(regionSection->MeBase); UINT32 meEnd = meBegin + calculateRegionSize(regionSection->MeBase, regionSection->MeLimit); QByteArray bios; UINT32 biosBegin = calculateRegionOffset(regionSection->BiosBase); UINT32 biosEnd = biosBegin + calculateRegionSize(regionSection->BiosBase, regionSection->BiosLimit); QByteArray pdr; UINT32 pdrBegin = calculateRegionOffset(regionSection->PdrBase); UINT32 pdrEnd = pdrBegin + calculateRegionSize(regionSection->PdrBase, regionSection->PdrLimit); UINT32 offset = descriptor.size(); // Reconstruct other regions char empty = '\xFF'; //!TODO: determine empty char using one of reserved descriptor fields for (int i = 1; i < item->childCount(); i++) { result = reconstruct(index.child(i, index.column()), childrenQueue); if (result) return result; switch(item->child(i)->subtype()) { case TreeItem::GbeRegion: gbe = childrenQueue.dequeue(); if (gbeBegin > offset) reconstructed.append(QByteArray(gbeBegin - offset, empty)); reconstructed.append(gbe); offset = gbeEnd; break; case TreeItem::MeRegion: me = childrenQueue.dequeue(); if (meBegin > offset) reconstructed.append(QByteArray(meBegin - offset, empty)); reconstructed.append(me); offset = meEnd; break; case TreeItem::BiosRegion: bios = childrenQueue.dequeue(); if (biosBegin > offset) reconstructed.append(QByteArray(biosBegin - offset, empty)); reconstructed.append(bios); offset = biosEnd; break; case TreeItem::PdrRegion: pdr = childrenQueue.dequeue(); if (pdrBegin > offset) reconstructed.append(QByteArray(pdrBegin - offset, empty)); reconstructed.append(pdr); offset = pdrEnd; break; default: msg(tr("reconstruct: unknown region type found while reconstructing Intel image"), index); return ERR_INVALID_REGION; } } if ((UINT32)item->body().size() > offset) reconstructed.append(QByteArray((UINT32)item->body().size() - offset, empty)); // Check size of reconstructed image, it must be same if (reconstructed.size() > item->body().size()) { msg(tr("reconstruct: reconstructed body %1 is bigger then original %2") .arg(reconstructed.size(), 8, 16, QChar('0')) .arg(item->body().size(), 8, 16, QChar('0')), index); return ERR_INVALID_PARAMETER; } else if (reconstructed.size() < item->body().size()) { msg(tr("reconstruct: reconstructed body %1 is smaller then original %2") .arg(reconstructed.size(), 8, 16, QChar('0')) .arg(item->body().size(), 8, 16, QChar('0')), index); return ERR_INVALID_PARAMETER; } // Enqueue reconstructed item queue.enqueue(item->header().append(reconstructed)); return ERR_SUCCESS; } // BIOS Image must be treated like region case TreeItem::Capsule: if (item->subtype() == TreeItem::AptioCapsule) msg(tr("reconstruct: Aptio capsule checksum and signature can now become invalid"), index); case TreeItem::Region: { // Reconstruct item body if (item->childCount()) { // Reconstruct item children for (int i = 0; i < item->childCount(); i++) { result = reconstruct(index.child(i, index.column()), childrenQueue); if (result) return result; } // No additional checks needed while (!childrenQueue.isEmpty()) reconstructed.append(childrenQueue.dequeue()); } // Use stored item body else reconstructed = item->body(); // Check size of reconstructed image, it must be same if (item->type() != TreeItem::Root) { if (reconstructed.size() > item->body().size()) { msg(tr("reconstructed: reconstructed body %1 is bigger then original %2") .arg(reconstructed.size(), 8, 16, QChar('0')) .arg(item->body().size(), 8, 16, QChar('0')), index); return ERR_INVALID_PARAMETER; } else if (reconstructed.size() < item->body().size()) { msg(tr("reconstructed: reconstructed body %1 is smaller then original %2") .arg(reconstructed.size(), 8, 16, QChar('0')) .arg(item->body().size(), 8, 16, QChar('0')), index); return ERR_INVALID_PARAMETER; } } // Enqueue reconstructed item queue.enqueue(item->header().append(reconstructed)); } break; case TreeItem::Volume: { //!TODO: add check for weak aligned volumes QByteArray header = item->header(); EFI_FIRMWARE_VOLUME_HEADER* volumeHeader = (EFI_FIRMWARE_VOLUME_HEADER*) header.data(); // Recalculate volume header checksum volumeHeader->Checksum = 0; volumeHeader->Checksum = calculateChecksum16((UINT16*) volumeHeader, volumeHeader->HeaderLength); // Reconstruct volume body if (item->childCount()) { UINT8 polarity = volumeHeader->Attributes & EFI_FVB_ERASE_POLARITY ? ERASE_POLARITY_TRUE : ERASE_POLARITY_FALSE; char empty = volumeHeader->Attributes & EFI_FVB_ERASE_POLARITY ? '\xFF' : '\x00'; // Reconstruct files in volume for (int i = 0; i < item->childCount(); i++) { // Reconstruct files result = reconstruct(index.child(i, index.column()), childrenQueue, volumeHeader->Revision, polarity); if (result) return result; } // Remove all pad files, they will be recreated later foreach(const QByteArray & child, childrenQueue) { EFI_FFS_FILE_HEADER* fileHeader = (EFI_FFS_FILE_HEADER*) child.constData(); if (fileHeader->Type == EFI_FV_FILETYPE_PAD) childrenQueue.removeAll(child); } // Get volume size UINT32 volumeSize; result = getVolumeSize(header, 0, volumeSize); if (result) return result; // Construct new volume body UINT32 offset = 0; while (!childrenQueue.isEmpty()) { // Align to 8 byte boundary UINT32 alignment = offset % 8; if (alignment) { alignment = 8 - alignment; offset += alignment; reconstructed.append(QByteArray(alignment, empty)); } // Get file from queue QByteArray file = childrenQueue.dequeue(); EFI_FFS_FILE_HEADER* fileHeader = (EFI_FFS_FILE_HEADER*) file.data(); // Check alignment UINT8 alignmentPower; UINT32 base; alignmentPower = ffsAlignmentTable[(fileHeader->Attributes & FFS_ATTRIB_DATA_ALIGNMENT) >> 3]; alignment = pow(2, alignmentPower); base = header.size() + offset + sizeof(EFI_FFS_FILE_HEADER); if (base % alignment) { // File will be unaligned if added as is, so we must add pad file before it // Determine pad file size UINT32 size = alignment - (base % alignment); // Required padding is smaler then minimal pad file size while (size < sizeof(EFI_FFS_FILE_HEADER)) { size += alignment; } // Construct pad file QByteArray pad; result = constructPadFile(size, revision, polarity, pad); if (result) return result; // Append constructed pad file to volume body reconstructed.append(pad); offset += size; } // If this is the last file in volume if (childrenQueue.isEmpty()) { // Last file of the volume can be Volume Top File if (file.left(sizeof(EFI_GUID)) == EFI_FFS_VOLUME_TOP_FILE_GUID) { // Determine correct VTF offset UINT32 vtfOffset = volumeSize - header.size() - file.size(); if (vtfOffset % 8) { msg(tr("reconstruct: %1: Wrong size of Volume Top File") .arg(guidToQString(volumeHeader->FileSystemGuid)), index); return ERR_INVALID_FILE; } // Insert pad file to fill the gap if (vtfOffset > offset) { // Determine pad file size UINT32 size = vtfOffset - offset; // Construct pad file QByteArray pad; result = constructPadFile(size, revision, polarity, pad); if (result) return result; // Append constructed pad file to volume body reconstructed.append(pad); offset = vtfOffset; } // No more space left in volume else if (vtfOffset < offset) { // Check if volume can be grown UINT8 parentType = item->parent()->type(); if(parentType != TreeItem::File && parentType != TreeItem::Section) { msg(tr("%1: can't grow root volume").arg(guidToQString(volumeHeader->FileSystemGuid)), index); return ERR_INVALID_VOLUME; } // Grow volume to fit VTF UINT32 newSize = volumeSize + (offset - vtfOffset) + sizeof(EFI_FFS_FILE_HEADER); result = growVolume(header, volumeSize, newSize); if (result) return result; // Determine new VTF offset vtfOffset = newSize - header.size() - file.size(); if (vtfOffset % 8) { msg(tr("reconstruct: %1: Wrong size of Volume Top File") .arg(guidToQString(volumeHeader->FileSystemGuid)), index); return ERR_INVALID_FILE; } // Construct pad file QByteArray pad; result = constructPadFile(vtfOffset - offset, revision, polarity, pad); if (result) return result; // Append constructed pad file to volume body reconstructed.append(pad); reconstructed.append(file); volumeSize = newSize; break; } } // Append last file and fill the rest with empty char else { reconstructed.append(file); UINT32 volumeBodySize = volumeSize - header.size(); if (volumeBodySize > (UINT32) reconstructed.size()) { // Fill volume end with empty char reconstructed.append(QByteArray(volumeBodySize - reconstructed.size(), empty)); } else { // Check if volume can be grown UINT8 parentType = item->parent()->type(); if(parentType != TreeItem::File && parentType != TreeItem::Section) { msg(tr("%1: can't grow root volume").arg(guidToQString(volumeHeader->FileSystemGuid)), index); return ERR_INVALID_VOLUME; } // Grow volume to fit new body UINT32 newSize = header.size() + reconstructed.size(); result = growVolume(header, volumeSize, newSize); // Fill volume end with empty char reconstructed.append(QByteArray(newSize - header.size() - reconstructed.size(), empty)); volumeSize = newSize; } break; } } // Append current file to new volume body reconstructed.append(file); // Change current file offset offset += file.size(); } // Check new volume size if ((UINT32)(header.size() + reconstructed.size()) > volumeSize) { msg(tr("reconstruct: Volume grow failed")); return ERR_INVALID_VOLUME; } } // Use current volume body else reconstructed = item->body(); // Enqueue reconstructed item queue.enqueue(header.append(reconstructed)); } break; case TreeItem::File: { QByteArray header = item->header(); EFI_FFS_FILE_HEADER* fileHeader = (EFI_FFS_FILE_HEADER*) header.data(); // Check erase polarity if (erasePolarity == ERASE_POLARITY_UNKNOWN) { msg(tr("reconstruct: %1, unknown erase polarity").arg(guidToQString(fileHeader->Name)), index); return ERR_INVALID_PARAMETER; } // Construct empty char for this file char empty = erasePolarity == ERASE_POLARITY_TRUE ? '\xFF' : '\x00'; // Check file state // Invert it first if erase polarity is true UINT8 state = fileHeader->State; if (erasePolarity == ERASE_POLARITY_TRUE) state = ~state; // Order of this checks must be preserved // Check file to have valid state, or delete it otherwise if (state & EFI_FILE_HEADER_INVALID) { // File marked to have invalid header and must be deleted // Do not add anything to queue msg(tr("reconstruct: %1, file is HEADER_INVALID state, and will be removed from reconstructed image") .arg(guidToQString(fileHeader->Name)), index); return ERR_SUCCESS; } else if (state & EFI_FILE_DELETED) { // File marked to have been deleted form and must be deleted // Do not add anything to queue msg(tr("reconstruct: %1, file is in DELETED state, and will be removed from reconstructed image") .arg(guidToQString(fileHeader->Name)), index); return ERR_SUCCESS; } else if (state & EFI_FILE_MARKED_FOR_UPDATE) { // File is marked for update, the mark must be removed msg(tr("reconstruct: %1, file MARKED_FOR_UPDATE state cleared") .arg(guidToQString(fileHeader->Name)), index); state &= ~EFI_FILE_MARKED_FOR_UPDATE; } else if (state & EFI_FILE_DATA_VALID) { // File is in good condition, reconstruct it } else if (state & EFI_FILE_HEADER_VALID) { // Header is valid, but data is not, so file must be deleted msg(tr("reconstruct: %1, file is in HEADER_VALID (but not in DATA_VALID) state, and will be removed from reconstructed image") .arg(guidToQString(fileHeader->Name)), index); return ERR_SUCCESS; } else if (state & EFI_FILE_HEADER_CONSTRUCTION) { // Header construction not finished, so file must be deleted msg(tr("reconstruct: %1, file is in HEADER_CONSTRUCTION (but not in DATA_VALID) state, and will be removed from reconstructed image") .arg(guidToQString(fileHeader->Name)), index); return ERR_SUCCESS; } // Reconstruct file body if (item->childCount()) { for (int i = 0; i < item->childCount(); i++) { // Reconstruct sections result = reconstruct(index.child(i, index.column()), childrenQueue, revision, empty); if (result) return result; } // Construct new file body UINT32 offset = 0; while (!childrenQueue.isEmpty()) { // Align to 4 byte boundary UINT8 alignment = offset % 4; if (alignment) { alignment = 4 - alignment; offset += alignment; reconstructed.append(QByteArray(alignment, empty)); } // Get section from queue QByteArray section = childrenQueue.dequeue(); // Append current section to new file body reconstructed.append(section); // Change current file offset offset += section.size(); } // Correct file size UINT8 tailSize = item->hasEmptyTail() ? 0 : sizeof(UINT16); uint32ToUint24(sizeof(EFI_FFS_FILE_HEADER) + reconstructed.size() + tailSize, fileHeader->Size); // Recalculate header checksum fileHeader->IntegrityCheck.Checksum.Header = 0; fileHeader->IntegrityCheck.Checksum.File = 0; fileHeader->IntegrityCheck.Checksum.Header = calculateChecksum8((UINT8*) fileHeader, sizeof(EFI_FFS_FILE_HEADER) - 1); } // Use current file body else reconstructed = item->body(); // Recalculate data checksum, if needed if (fileHeader->Attributes & FFS_ATTRIB_CHECKSUM) { fileHeader->IntegrityCheck.Checksum.File = calculateChecksum8((UINT8*) reconstructed.constData(), reconstructed.size()); } else if (revision == 1) fileHeader->IntegrityCheck.Checksum.File = FFS_FIXED_CHECKSUM; else fileHeader->IntegrityCheck.Checksum.File = FFS_FIXED_CHECKSUM2; // Append tail, if needed if (!item->hasEmptyTail()) reconstructed.append(!fileHeader->IntegrityCheck.TailReference); // Set file state state = EFI_FILE_DATA_VALID | EFI_FILE_HEADER_VALID | EFI_FILE_HEADER_CONSTRUCTION; if (erasePolarity == ERASE_POLARITY_TRUE) state = ~state; // Enqueue reconstructed item queue.enqueue(header.append(reconstructed)); } break; case TreeItem::Section: { QByteArray header = item->header(); EFI_COMMON_SECTION_HEADER* commonHeader = (EFI_COMMON_SECTION_HEADER*) header.data(); // Section with children if (item->childCount()) { // Reconstruct section body for (int i = 0; i < item->childCount(); i++) { // Reconstruct subsections result = reconstruct(index.child(i, index.column()), childrenQueue); if (result) return result; } // Construct new section body UINT32 offset = 0; while (!childrenQueue.isEmpty()) { // Align to 4 byte boundary UINT8 alignment = offset % 4; if (alignment) { alignment = 4 - alignment; offset += alignment; reconstructed.append(QByteArray(alignment, '\x00')); } // Get section from queue QByteArray section = childrenQueue.dequeue(); // Append current subsection to new section body reconstructed.append(section); // Change current file offset offset += section.size(); } // Only this 2 sections can have compressed body if (item->subtype() == EFI_SECTION_COMPRESSION) { EFI_COMPRESSION_SECTION* compessionHeader = (EFI_COMPRESSION_SECTION*) header.data(); // Set new uncompressed size compessionHeader->UncompressedLength = reconstructed.size(); // Compress new section body QByteArray compressed; result = compress(reconstructed, item->compression(), compressed); if (result) return result; // Correct compression type if (item->compression() == COMPRESSION_ALGORITHM_NONE) compessionHeader->CompressionType = EFI_NOT_COMPRESSED; else if (item->compression() == COMPRESSION_ALGORITHM_LZMA || item->compression() == COMPRESSION_ALGORITHM_IMLZMA) compessionHeader->CompressionType = EFI_CUSTOMIZED_COMPRESSION; else compessionHeader->CompressionType = EFI_STANDARD_COMPRESSION; // Replace new section body reconstructed = compressed; } else if (item->subtype() == EFI_SECTION_GUID_DEFINED) { EFI_GUID_DEFINED_SECTION* guidDefinedHeader = (EFI_GUID_DEFINED_SECTION*) header.data(); // Compress new section body QByteArray compressed; result = compress(reconstructed, item->compression(), compressed); if (result) return result; // Check for auth status valid attribute if (guidDefinedHeader->Attributes & EFI_GUIDED_SECTION_AUTH_STATUS_VALID) { msg(tr("reconstruct: %1: GUID defined section signature can now become invalid") .arg(guidToQString(guidDefinedHeader->SectionDefinitionGuid))); } // Replace new section body reconstructed = compressed; } else if (item->compression() != COMPRESSION_ALGORITHM_NONE) { msg(tr("reconstruct: compression required for section of type %1") .arg(item->subtype())); return ERR_INVALID_SECTION; } // Correct section size uint32ToUint24(header.size() + reconstructed.size(), commonHeader->Size); } // Leaf section else reconstructed = item->body(); // Enqueue reconstructed item queue.enqueue(header.append(reconstructed)); } break; default: msg(tr("reconstruct: Unknown item type (%1)").arg(item->type())); return ERR_UNKNOWN_ITEM_TYPE; } return ERR_SUCCESS; } return ERR_NOT_IMPLEMENTED; } UINT8 FfsEngine::growVolume(QByteArray & header, const UINT32 size, UINT32 & newSize) { // Adjust new size to be representable by current FvBlockMap EFI_FIRMWARE_VOLUME_HEADER* volumeHeader = (EFI_FIRMWARE_VOLUME_HEADER*) header.data(); EFI_FV_BLOCK_MAP_ENTRY* blockMap = (EFI_FV_BLOCK_MAP_ENTRY*) (header.data() + sizeof(EFI_FIRMWARE_VOLUME_HEADER)); // Get block map size UINT32 extHeaderOffset = volumeHeader->Revision == 2 ? volumeHeader->ExtHeaderOffset : 0; UINT32 blockMapSize = header.size() - extHeaderOffset - sizeof(EFI_FIRMWARE_VOLUME_HEADER); if (blockMapSize % sizeof(EFI_FV_BLOCK_MAP_ENTRY)) return ERR_INVALID_VOLUME; UINT32 blockMapCount = blockMapSize / sizeof(EFI_FV_BLOCK_MAP_ENTRY); // Check blockMap validity if (blockMap[blockMapCount-1].NumBlocks != 0 || blockMap[blockMapCount-1].Length != 0) return ERR_INVALID_VOLUME; // Calculate new size if (newSize <= size) return ERR_INVALID_PARAMETER; newSize += blockMap->Length - newSize % blockMap->Length; // Recalculate number of blocks blockMap->NumBlocks = newSize / blockMap->Length; // Set new volume size volumeHeader->FvLength = 0; for(UINT8 i = 0; i < blockMapCount; i++) { volumeHeader->FvLength += blockMap[i].NumBlocks * blockMap[i].Length; } // Recalculate volume header checksum volumeHeader->Checksum = 0; volumeHeader->Checksum = calculateChecksum16((UINT16*) volumeHeader, volumeHeader->HeaderLength); return ERR_SUCCESS; } // Will be refactored later /*QByteArray FfsEngine::decompressFile(const QModelIndex& index) const { if (!index.isValid()) return QByteArray(); // Check index item to be FFS file TreeItem *item = static_cast(index.internalPointer()); if(item->type() != TreeItem::File) return QByteArray(); QByteArray file; UINT32 offset = 0; // Construct new item body for (int i = 0; i < item->childCount(); i++) { // If section is not compressed, add it to new body as is TreeItem* sectionItem = item->child(i); if (sectionItem->subtype() != EFI_SECTION_COMPRESSION) { QByteArray section = sectionItem->header().append(sectionItem->body()); UINT32 align = ALIGN4(offset) - offset; file.append(QByteArray(align, '\x00')).append(section); offset += align + section.size(); } else { // Construct new section body by adding all child sections to this new section QByteArray section; UINT32 subOffset = 0; for (int j = 0; j < sectionItem->childCount(); j++) { TreeItem* subSectionItem = sectionItem->child(j); QByteArray subSection = subSectionItem->header().append(subSectionItem->body()); UINT32 align = ALIGN4(subOffset) - subOffset; section.append(QByteArray(align, '\x00')).append(subSection); subOffset += align + subSection.size(); } // Add newly constructed section to file body EFI_COMPRESSION_SECTION sectionHeader; sectionHeader.Type = EFI_SECTION_COMPRESSION; sectionHeader.CompressionType = EFI_NOT_COMPRESSED; sectionHeader.UncompressedLength = section.size(); uint32ToUint24(section.size() + sizeof(EFI_COMPRESSION_SECTION), sectionHeader.Size); UINT32 align = ALIGN4(offset) - offset; file.append(QByteArray(align, '\x00')) .append(QByteArray((const char*) §ionHeader, sizeof(EFI_COMPRESSION_SECTION))) .append(section); offset += align + section.size(); } } QByteArray header = item->header(); EFI_FFS_FILE_HEADER* fileHeader = (EFI_FFS_FILE_HEADER*) header.data(); // Correct file data checksum, if needed if (fileHeader->Attributes & FFS_ATTRIB_CHECKSUM) { UINT32 bufferSize = file.size() - sizeof(EFI_FFS_FILE_HEADER); fileHeader->IntegrityCheck.Checksum.File = calculateChecksum8((UINT8*)(file.data() + sizeof(EFI_FFS_FILE_HEADER)), bufferSize); } // Add file tail, if needed if(fileHeader->Attributes & FFS_ATTRIB_TAIL_PRESENT) file.append(!fileHeader->IntegrityCheck.TailReference); return header.append(file); }*/ /*bool FfsEngine::isCompressedFile(const QModelIndex& index) const { if (!index.isValid()) return false; TreeItem *item = static_cast(index.internalPointer()); if(item->type() != TreeItem::File) return false; for (int i = 0; i < item->childCount(); i++) { if (item->child(i)->subtype() == EFI_SECTION_COMPRESSION) return true; } return false; }*/