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UEFITool/common/ffsparser.cpp
Cr4sh 0f0bc32a42 NE Alpha 40
2017-02-14 09:39:16 +03:00

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/* ffsparser.cpp
Copyright (c) 2016, 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 "ffsparser.h"
#include <map>
#include <algorithm>
#include <math.h>
#include <inttypes.h>
#include "descriptor.h"
#include "ffs.h"
#include "gbe.h"
#include "me.h"
#include "fit.h"
#include "nvram.h"
#include "utility.h"
#include "peimage.h"
#include "parsingdata.h"
#include "types.h"
// Region info structure definition
struct REGION_INFO {
UINT32 offset;
UINT32 length;
UINT8 type;
UByteArray data;
friend bool operator< (const REGION_INFO & lhs, const REGION_INFO & rhs){ return lhs.offset < rhs.offset; }
};
// Firmware image parsing functions
USTATUS FfsParser::parse(const UByteArray & buffer)
{
UModelIndex root;
USTATUS result = performFirstPass(buffer, root);
addOffsetsRecursive(root);
if (result)
return result;
if (lastVtf.isValid())
result = performSecondPass(root);
else
msg(UString("parse: not a single Volume Top File is found, the image may be corrupted"));
return result;
}
USTATUS FfsParser::performFirstPass(const UByteArray & buffer, UModelIndex & index)
{
// Reset capsule offset fixup value
capsuleOffsetFixup = 0;
// Check buffer size to be more than or equal to size of EFI_CAPSULE_HEADER
if ((UINT32)buffer.size() <= sizeof(EFI_CAPSULE_HEADER)) {
msg(UString("performFirstPass: image file is smaller than minimum size of 1Ch (28) bytes"));
return U_INVALID_PARAMETER;
}
UINT32 capsuleHeaderSize = 0;
// Check buffer for being normal EFI capsule header
if (buffer.startsWith(EFI_CAPSULE_GUID)
|| buffer.startsWith(INTEL_CAPSULE_GUID)
|| buffer.startsWith(LENOVO_CAPSULE_GUID)
|| buffer.startsWith(LENOVO2_CAPSULE_GUID)) {
// Get info
const EFI_CAPSULE_HEADER* capsuleHeader = (const EFI_CAPSULE_HEADER*)buffer.constData();
// Check sanity of HeaderSize and CapsuleImageSize values
if (capsuleHeader->HeaderSize == 0 || capsuleHeader->HeaderSize > (UINT32)buffer.size() || capsuleHeader->HeaderSize > capsuleHeader->CapsuleImageSize) {
msg(usprintf("performFirstPass: UEFI capsule header size of %Xh (%u) bytes is invalid",
capsuleHeader->HeaderSize,
capsuleHeader->HeaderSize));
return U_INVALID_CAPSULE;
}
if (capsuleHeader->CapsuleImageSize == 0 || capsuleHeader->CapsuleImageSize > (UINT32)buffer.size()) {
msg(usprintf("performFirstPass: UEFI capsule image size of %Xh (%u) bytes is invalid",
capsuleHeader->CapsuleImageSize,
capsuleHeader->CapsuleImageSize));
return U_INVALID_CAPSULE;
}
capsuleHeaderSize = capsuleHeader->HeaderSize;
UByteArray header = buffer.left(capsuleHeaderSize);
UByteArray body = buffer.mid(capsuleHeaderSize);
UString name("UEFI capsule");
UString info = UString("Capsule GUID: ") + guidToUString(capsuleHeader->CapsuleGuid, false) +
usprintf("\nFull size: %Xh (%u)\nHeader size: %Xh (%u)\nImage size: %Xh (%u)\nFlags: %08Xh",
buffer.size(), buffer.size(),
capsuleHeaderSize, capsuleHeaderSize,
capsuleHeader->CapsuleImageSize - capsuleHeaderSize, capsuleHeader->CapsuleImageSize - capsuleHeaderSize,
capsuleHeader->Flags);
// Set capsule offset fixup for correct volume allignment warnings
capsuleOffsetFixup = capsuleHeaderSize;
// Add tree item
index = model->addItem(0, Types::Capsule, Subtypes::UefiCapsule, name, UString(), info, header, body, UByteArray(), Fixed);
}
// 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();
// Check sanity of HeaderSize and FullSize values
if (capsuleHeader->HeaderSize == 0 || capsuleHeader->HeaderSize > (UINT32)buffer.size() || capsuleHeader->HeaderSize > capsuleHeader->FullSize) {
msg(usprintf("performFirstPass: Toshiba capsule header size of %Xh (%u) bytes is invalid",
capsuleHeader->HeaderSize, capsuleHeader->HeaderSize));
return U_INVALID_CAPSULE;
}
if (capsuleHeader->FullSize == 0 || capsuleHeader->FullSize > (UINT32)buffer.size()) {
msg(usprintf("performFirstPass: Toshiba capsule full size of %Xh (%u) bytes is invalid",
capsuleHeader->FullSize, capsuleHeader->FullSize));
return U_INVALID_CAPSULE;
}
capsuleHeaderSize = capsuleHeader->HeaderSize;
UByteArray header = buffer.left(capsuleHeaderSize);
UByteArray body = buffer.mid(capsuleHeaderSize);
UString name("Toshiba capsule");
UString info = UString("Capsule GUID: ") + guidToUString(capsuleHeader->CapsuleGuid, false) +
usprintf("\nFull size: %Xh (%u)\nHeader size: %Xh (%u)\nImage size: %Xh (%u)\nFlags: %08Xh",
buffer.size(), buffer.size(),
capsuleHeaderSize, capsuleHeaderSize,
capsuleHeader->FullSize - capsuleHeaderSize, capsuleHeader->FullSize - capsuleHeaderSize,
capsuleHeader->Flags);
// Set capsule offset fixup for correct volume allignment warnings
capsuleOffsetFixup = capsuleHeaderSize;
// Add tree item
index = model->addItem(0, Types::Capsule, Subtypes::ToshibaCapsule, name, UString(), info, header, body, UByteArray(), Fixed);
}
// Check buffer for being extended Aptio capsule header
else if (buffer.startsWith(APTIO_SIGNED_CAPSULE_GUID) || buffer.startsWith(APTIO_UNSIGNED_CAPSULE_GUID)) {
bool signedCapsule = buffer.startsWith(APTIO_SIGNED_CAPSULE_GUID);
if ((UINT32)buffer.size() <= sizeof(APTIO_CAPSULE_HEADER)) {
msg(UString("performFirstPass: AMI capsule image file is smaller than minimum size of 20h (32) bytes"));
return U_INVALID_PARAMETER;
}
// Get info
const APTIO_CAPSULE_HEADER* capsuleHeader = (const APTIO_CAPSULE_HEADER*)buffer.constData();
// Check sanity of RomImageOffset and CapsuleImageSize values
if (capsuleHeader->RomImageOffset == 0 || capsuleHeader->RomImageOffset > (UINT32)buffer.size() || capsuleHeader->RomImageOffset > capsuleHeader->CapsuleHeader.CapsuleImageSize) {
msg(usprintf("performFirstPass: AMI capsule image offset of %Xh (%u) bytes is invalid",
capsuleHeader->RomImageOffset, capsuleHeader->RomImageOffset));
return U_INVALID_CAPSULE;
}
if (capsuleHeader->CapsuleHeader.CapsuleImageSize == 0 || capsuleHeader->CapsuleHeader.CapsuleImageSize > (UINT32)buffer.size()) {
msg(usprintf("performFirstPass: AMI capsule image size of %Xh (%u) bytes is invalid",
capsuleHeader->CapsuleHeader.CapsuleImageSize,
capsuleHeader->CapsuleHeader.CapsuleImageSize));
return U_INVALID_CAPSULE;
}
capsuleHeaderSize = capsuleHeader->RomImageOffset;
UByteArray header = buffer.left(capsuleHeaderSize);
UByteArray body = buffer.mid(capsuleHeaderSize);
UString name("AMI Aptio capsule");
UString info = UString("Capsule GUID: ") + guidToUString(capsuleHeader->CapsuleHeader.CapsuleGuid, false) +
usprintf("\nFull size: %Xh (%u)\nHeader size: %Xh (%u)\nImage size: %Xh (%u)\nFlags: %08Xh",
buffer.size(), buffer.size(),
capsuleHeaderSize, capsuleHeaderSize,
capsuleHeader->CapsuleHeader.CapsuleImageSize - capsuleHeaderSize, capsuleHeader->CapsuleHeader.CapsuleImageSize - capsuleHeaderSize,
capsuleHeader->CapsuleHeader.Flags);
// Set capsule offset fixup for correct volume allignment warnings
capsuleOffsetFixup = capsuleHeaderSize;
// Add tree item
index = model->addItem(0, Types::Capsule, signedCapsule ? Subtypes::AptioSignedCapsule : Subtypes::AptioUnsignedCapsule, name, UString(), info, header, body, UByteArray(), Fixed);
// Show message about possible Aptio signature break
if (signedCapsule) {
msg(UString("performFirstPass: Aptio capsule signature may become invalid after image modifications"), index);
}
}
// Skip capsule header to have flash chip image
UByteArray flashImage = buffer.mid(capsuleHeaderSize);
// Check for Intel flash descriptor presence
const FLASH_DESCRIPTOR_HEADER* descriptorHeader = (const FLASH_DESCRIPTOR_HEADER*)flashImage.constData();
// Check descriptor signature
USTATUS result;
if (descriptorHeader->Signature == FLASH_DESCRIPTOR_SIGNATURE) {
// Parse as Intel image
UModelIndex imageIndex;
result = parseIntelImage(flashImage, capsuleOffsetFixup, index, imageIndex);
if (result != U_INVALID_FLASH_DESCRIPTOR) {
if (!index.isValid()) {
index = imageIndex;
}
return result;
}
}
// Get info
UString name("UEFI image");
UString info = usprintf("Full size: %Xh (%u)", flashImage.size(), flashImage.size());
// Add tree item
UModelIndex biosIndex = model->addItem(capsuleOffsetFixup, Types::Image, Subtypes::UefiImage, name, UString(), info, UByteArray(), flashImage, UByteArray(), Fixed, index);
// Parse the image
result = parseRawArea(biosIndex);
if (!index.isValid())
index = biosIndex;
return result;
}
USTATUS FfsParser::parseIntelImage(const UByteArray & intelImage, const UINT32 localOffset, const UModelIndex & parent, UModelIndex & index)
{
// 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();
// Check for buffer size to be greater or equal to descriptor region size
if (intelImage.size() < FLASH_DESCRIPTOR_SIZE) {
msg(usprintf("parseIntelImage: input file is smaller than minimum descriptor size of %Xh (%u) bytes", FLASH_DESCRIPTOR_SIZE, FLASH_DESCRIPTOR_SIZE));
return U_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(usprintf("parseIntelImage: invalid descriptor master base %02Xh", descriptorMap->MasterBase));
return U_INVALID_FLASH_DESCRIPTOR;
}
if (descriptorMap->RegionBase > FLASH_DESCRIPTOR_MAX_BASE
|| descriptorMap->RegionBase == descriptorMap->ComponentBase) {
msg(usprintf("parseIntelImage: invalid descriptor region base %02Xh", descriptorMap->RegionBase));
return U_INVALID_FLASH_DESCRIPTOR;
}
if (descriptorMap->ComponentBase > FLASH_DESCRIPTOR_MAX_BASE) {
msg(usprintf("parseIntelImage: invalid descriptor component base %02Xh", descriptorMap->ComponentBase));
return U_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 descriptor version by getting hardcoded value of FlashParameters.ReadClockFrequency
UINT8 descriptorVersion = 0;
if (componentSection->FlashParameters.ReadClockFrequency == FLASH_FREQUENCY_20MHZ) // Old descriptor
descriptorVersion = 1;
else if (componentSection->FlashParameters.ReadClockFrequency == FLASH_FREQUENCY_17MHZ) // Skylake+ descriptor
descriptorVersion = 2;
else {
msg(usprintf("parseIntelImage: unknown descriptor version with ReadClockFrequency %02Xh", componentSection->FlashParameters.ReadClockFrequency));
return U_INVALID_FLASH_DESCRIPTOR;
}
// Regions
std::vector<REGION_INFO> regions;
// ME region
REGION_INFO me;
me.type = Subtypes::MeRegion;
me.offset = 0;
me.length = 0;
if (regionSection->MeLimit) {
me.offset = calculateRegionOffset(regionSection->MeBase);
me.length = calculateRegionSize(regionSection->MeBase, regionSection->MeLimit);
me.data = intelImage.mid(me.offset, me.length);
regions.push_back(me);
}
// BIOS region
REGION_INFO bios;
bios.type = Subtypes::BiosRegion;
bios.offset = 0;
bios.length = 0;
if (regionSection->BiosLimit) {
bios.offset = calculateRegionOffset(regionSection->BiosBase);
bios.length = calculateRegionSize(regionSection->BiosBase, regionSection->BiosLimit);
// Check for Gigabyte specific descriptor map
if (bios.length == (UINT32)intelImage.size()) {
if (!me.offset) {
msg(UString("parseIntelImage: can't determine BIOS region start from Gigabyte-specific descriptor"));
return U_INVALID_FLASH_DESCRIPTOR;
}
// Use ME region end as BIOS region offset
bios.offset = me.offset + me.length;
bios.length = (UINT32)intelImage.size() - bios.offset;
bios.data = intelImage.mid(bios.offset, bios.length);
}
// Normal descriptor map
else {
bios.data = intelImage.mid(bios.offset, bios.length);
}
regions.push_back(bios);
}
else {
msg(UString("parseIntelImage: descriptor parsing failed, BIOS region not found in descriptor"));
return U_INVALID_FLASH_DESCRIPTOR;
}
// GbE region
REGION_INFO gbe;
gbe.type = Subtypes::GbeRegion;
gbe.offset = 0;
gbe.length = 0;
if (regionSection->GbeLimit) {
gbe.offset = calculateRegionOffset(regionSection->GbeBase);
gbe.length = calculateRegionSize(regionSection->GbeBase, regionSection->GbeLimit);
gbe.data = intelImage.mid(gbe.offset, gbe.length);
regions.push_back(gbe);
}
// PDR region
REGION_INFO pdr;
pdr.type = Subtypes::PdrRegion;
pdr.offset = 0;
pdr.length = 0;
if (regionSection->PdrLimit) {
pdr.offset = calculateRegionOffset(regionSection->PdrBase);
pdr.length = calculateRegionSize(regionSection->PdrBase, regionSection->PdrLimit);
pdr.data = intelImage.mid(pdr.offset, pdr.length);
regions.push_back(pdr);
}
// Reserved1 region
REGION_INFO reserved1;
reserved1.type = Subtypes::Reserved1Region;
reserved1.offset = 0;
reserved1.length = 0;
if (regionSection->Reserved1Limit && regionSection->Reserved1Base != 0xFFFF && regionSection->Reserved1Limit != 0xFFFF) {
reserved1.offset = calculateRegionOffset(regionSection->Reserved1Base);
reserved1.length = calculateRegionSize(regionSection->Reserved1Base, regionSection->Reserved1Limit);
reserved1.data = intelImage.mid(reserved1.offset, reserved1.length);
regions.push_back(reserved1);
}
// Reserved2 region
REGION_INFO reserved2;
reserved2.type = Subtypes::Reserved2Region;
reserved2.offset = 0;
reserved2.length = 0;
if (regionSection->Reserved2Limit && regionSection->Reserved2Base != 0xFFFF && regionSection->Reserved2Limit != 0xFFFF) {
reserved2.offset = calculateRegionOffset(regionSection->Reserved2Base);
reserved2.length = calculateRegionSize(regionSection->Reserved2Base, regionSection->Reserved2Limit);
reserved2.data = intelImage.mid(reserved2.offset, reserved2.length);
regions.push_back(reserved2);
}
// Reserved3 region
REGION_INFO reserved3;
reserved3.type = Subtypes::Reserved3Region;
reserved3.offset = 0;
reserved3.length = 0;
// EC region
REGION_INFO ec;
ec.type = Subtypes::EcRegion;
ec.offset = 0;
ec.length = 0;
// Reserved4 region
REGION_INFO reserved4;
reserved3.type = Subtypes::Reserved4Region;
reserved4.offset = 0;
reserved4.length = 0;
// Check for EC and reserved region 4 only for v2 descriptor
if (descriptorVersion == 2) {
if (regionSection->Reserved3Limit) {
reserved3.offset = calculateRegionOffset(regionSection->Reserved3Base);
reserved3.length = calculateRegionSize(regionSection->Reserved3Base, regionSection->Reserved3Limit);
reserved3.data = intelImage.mid(reserved3.offset, reserved3.length);
regions.push_back(reserved3);
}
if (regionSection->EcLimit) {
ec.offset = calculateRegionOffset(regionSection->EcBase);
ec.length = calculateRegionSize(regionSection->EcBase, regionSection->EcLimit);
ec.data = intelImage.mid(ec.offset, ec.length);
regions.push_back(ec);
}
if (regionSection->Reserved4Limit) {
reserved4.offset = calculateRegionOffset(regionSection->Reserved4Base);
reserved4.length = calculateRegionSize(regionSection->Reserved4Base, regionSection->Reserved4Limit);
reserved4.data = intelImage.mid(reserved4.offset, reserved4.length);
regions.push_back(reserved4);
}
}
// Sort regions in ascending order
std::sort(regions.begin(), regions.end());
// Check for intersections and paddings between regions
REGION_INFO region;
// Check intersection with the descriptor
if (regions.front().offset < FLASH_DESCRIPTOR_SIZE) {
msg(UString("parseIntelImage: ") + itemSubtypeToUString(Types::Region, regions.front().type)
+ UString(" region has intersection with flash descriptor"),
index);
return U_INVALID_FLASH_DESCRIPTOR;
}
// Check for padding between descriptor and the first region
else if (regions.front().offset > FLASH_DESCRIPTOR_SIZE) {
region.offset = FLASH_DESCRIPTOR_SIZE;
region.length = regions.front().offset - FLASH_DESCRIPTOR_SIZE;
region.data = intelImage.mid(region.offset, region.length);
region.type = getPaddingType(region.data);
regions.insert(regions.begin(), region);
}
// Check for intersections/paddings between regions
for (size_t i = 1; i < regions.size(); i++) {
UINT32 previousRegionEnd = regions[i-1].offset + regions[i-1].length;
// Check that current region is fully present in the image
if ((UINT64)regions[i].offset + (UINT64)regions[i].length > (UINT64)intelImage.size()) {
msg(UString("parseIntelImage: ") + itemSubtypeToUString(Types::Region, regions[i].type)
+ UString(" region is located outside of the opened image. If your system uses dual-chip storage, please append another part to the opened image"),
index);
return U_TRUNCATED_IMAGE;
}
// Check for intersection with previous region
if (regions[i].offset < previousRegionEnd) {
msg(UString("parseIntelImage: ") + itemSubtypeToUString(Types::Region, regions[i].type)
+ UString(" region has intersection with ") + itemSubtypeToUString(Types::Region, regions[i - 1].type) +UString(" region"),
index);
return U_INVALID_FLASH_DESCRIPTOR;
}
// Check for padding between current and previous regions
else if (regions[i].offset > previousRegionEnd) {
region.offset = previousRegionEnd;
region.length = regions[i].offset - previousRegionEnd;
region.data = intelImage.mid(region.offset, region.length);
region.type = getPaddingType(region.data);
std::vector<REGION_INFO>::iterator iter = regions.begin();
std::advance(iter, i);
regions.insert(iter, region);
}
}
// Check for padding after the last region
if ((UINT64)regions.back().offset + (UINT64)regions.back().length < (UINT64)intelImage.size()) {
region.offset = regions.back().offset + regions.back().length;
region.length = intelImage.size() - region.offset;
region.data = intelImage.mid(region.offset, region.length);
region.type = getPaddingType(region.data);
regions.push_back(region);
}
// Region map is consistent
// Intel image
UString name("Intel image");
UString info = usprintf("Full size: %Xh (%u)\nFlash chips: %u\nRegions: %u\nMasters: %u\nPCH straps: %u\nPROC straps: %u",
intelImage.size(), intelImage.size(),
descriptorMap->NumberOfFlashChips + 1, //
descriptorMap->NumberOfRegions + 1, // Zero-based numbers in storage
descriptorMap->NumberOfMasters + 1, //
descriptorMap->NumberOfPchStraps,
descriptorMap->NumberOfProcStraps);
// Add Intel image tree item
index = model->addItem(localOffset, Types::Image, Subtypes::IntelImage, name, UString(), info, UByteArray(), intelImage, UByteArray(), Fixed, parent);
// Descriptor
// Get descriptor info
UByteArray body = intelImage.left(FLASH_DESCRIPTOR_SIZE);
name = UString("Descriptor region");
info = usprintf("Full size: %Xh (%u)", FLASH_DESCRIPTOR_SIZE, FLASH_DESCRIPTOR_SIZE);
// Add offsets of actual regions
for (size_t i = 0; i < regions.size(); i++) {
if (regions[i].type != Subtypes::ZeroPadding && regions[i].type != Subtypes::OnePadding && regions[i].type != Subtypes::DataPadding)
info += UString("\n") + itemSubtypeToUString(Types::Region, regions[i].type)
+ usprintf(" region offset: %Xh", regions[i].offset + localOffset);
}
// Region access settings
if (descriptorVersion == 1) {
const FLASH_DESCRIPTOR_MASTER_SECTION* masterSection = (const FLASH_DESCRIPTOR_MASTER_SECTION*)calculateAddress8(descriptor, descriptorMap->MasterBase);
info += UString("\nRegion access settings:");
info += usprintf("\nBIOS: %02Xh %02Xh ME: %02Xh %02Xh\nGbE: %02Xh %02Xh",
masterSection->BiosRead,
masterSection->BiosWrite,
masterSection->MeRead,
masterSection->MeWrite,
masterSection->GbeRead,
masterSection->GbeWrite);
// BIOS access table
info += UString("\nBIOS access table:")
+ UString("\n Read Write")
+ usprintf("\nDesc %s %s", masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_DESC ? "Yes " : "No ",
masterSection->BiosWrite & FLASH_DESCRIPTOR_REGION_ACCESS_DESC ? "Yes " : "No ");
info += UString("\nBIOS Yes Yes")
+ usprintf("\nME %s %s", masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_ME ? "Yes " : "No ",
masterSection->BiosWrite & FLASH_DESCRIPTOR_REGION_ACCESS_ME ? "Yes " : "No ");
info += usprintf("\nGbE %s %s", masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_GBE ? "Yes " : "No ",
masterSection->BiosWrite & FLASH_DESCRIPTOR_REGION_ACCESS_GBE ? "Yes " : "No ");
info += usprintf("\nPDR %s %s", masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_PDR ? "Yes " : "No ",
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 += UString("\nRegion access settings:");
info += usprintf("\nBIOS: %03Xh %03Xh ME: %03Xh %03Xh\nGbE: %03Xh %03Xh EC: %03Xh %03Xh",
masterSection->BiosRead,
masterSection->BiosWrite,
masterSection->MeRead,
masterSection->MeWrite,
masterSection->GbeRead,
masterSection->GbeWrite,
masterSection->EcRead,
masterSection->EcWrite);
// BIOS access table
info += UString("\nBIOS access table:")
+ UString("\n Read Write")
+ usprintf("\nDesc %s %s",
masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_DESC ? "Yes " : "No ",
masterSection->BiosWrite & FLASH_DESCRIPTOR_REGION_ACCESS_DESC ? "Yes " : "No ");
info += UString("\nBIOS Yes Yes")
+ usprintf("\nME %s %s",
masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_ME ? "Yes " : "No ",
masterSection->BiosWrite & FLASH_DESCRIPTOR_REGION_ACCESS_ME ? "Yes " : "No ");
info += usprintf("\nGbE %s %s",
masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_GBE ? "Yes " : "No ",
masterSection->BiosWrite & FLASH_DESCRIPTOR_REGION_ACCESS_GBE ? "Yes " : "No ");
info += usprintf("\nPDR %s %s",
masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_PDR ? "Yes " : "No ",
masterSection->BiosWrite & FLASH_DESCRIPTOR_REGION_ACCESS_PDR ? "Yes " : "No ");
info += usprintf("\nEC %s %s",
masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_EC ? "Yes " : "No ",
masterSection->BiosWrite & FLASH_DESCRIPTOR_REGION_ACCESS_EC ? "Yes " : "No ");
}
// VSCC table
const VSCC_TABLE_ENTRY* vsccTableEntry = (const VSCC_TABLE_ENTRY*)(descriptor + ((UINT16)upperMap->VsccTableBase << 4));
info += UString("\nFlash chips in VSCC table:");
UINT8 vsscTableSize = upperMap->VsccTableSize * sizeof(UINT32) / sizeof(VSCC_TABLE_ENTRY);
for (int i = 0; i < vsscTableSize; i++) {
info += usprintf("\n%02X%02X%02X (",
vsccTableEntry->VendorId, vsccTableEntry->DeviceId0, vsccTableEntry->DeviceId1)
+ jedecIdToUString(vsccTableEntry->VendorId, vsccTableEntry->DeviceId0, vsccTableEntry->DeviceId1)
+ UString(")");
vsccTableEntry++;
}
// Add descriptor tree item
UModelIndex regionIndex = model->addItem(localOffset, Types::Region, Subtypes::DescriptorRegion, name, UString(), info, UByteArray(), body, UByteArray(), Fixed, index);
// Parse regions
UINT8 result = U_SUCCESS;
UINT8 parseResult = U_SUCCESS;
for (size_t i = 0; i < regions.size(); i++) {
region = regions[i];
switch (region.type) {
case Subtypes::BiosRegion:
result = parseBiosRegion(region.data, region.offset, index, regionIndex);
break;
case Subtypes::MeRegion:
result = parseMeRegion(region.data, region.offset, index, regionIndex);
break;
case Subtypes::GbeRegion:
result = parseGbeRegion(region.data, region.offset, index, regionIndex);
break;
case Subtypes::PdrRegion:
result = parsePdrRegion(region.data, region.offset, index, regionIndex);
break;
case Subtypes::Reserved1Region:
case Subtypes::Reserved2Region:
case Subtypes::Reserved3Region:
case Subtypes::EcRegion:
case Subtypes::Reserved4Region:
result = parseGeneralRegion(region.type, region.data, region.offset, index, regionIndex);
break;
case Subtypes::ZeroPadding:
case Subtypes::OnePadding:
case Subtypes::DataPadding: {
// Add padding between regions
UByteArray padding = intelImage.mid(region.offset, region.length);
// Get info
name = UString("Padding");
info = usprintf("Full size: %Xh (%u)",
padding.size(), padding.size());
// Add tree item
regionIndex = model->addItem(localOffset + region.offset, Types::Padding, getPaddingType(padding), name, UString(), info, UByteArray(), padding, UByteArray(), Fixed, index);
result = U_SUCCESS;
} break;
default:
msg(UString("parseIntelImage: region of unknown type found"), index);
result = U_INVALID_FLASH_DESCRIPTOR;
}
// Store the first failed result as a final result
if (!parseResult && result) {
parseResult = result;
}
}
return parseResult;
}
USTATUS FfsParser::parseGbeRegion(const UByteArray & gbe, const UINT32 localOffset, const UModelIndex & parent, UModelIndex & index)
{
// Check sanity
if (gbe.isEmpty())
return U_EMPTY_REGION;
if ((UINT32)gbe.size() < GBE_VERSION_OFFSET + sizeof(GBE_VERSION))
return U_INVALID_REGION;
// Get info
UString name("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);
UString info = usprintf("Full size: %Xh (%u)\nMAC: %02X:%02X:%02X:%02X:%02X:%02X\nVersion: %u.%u",
gbe.size(), gbe.size(),
mac->vendor[0], mac->vendor[1], mac->vendor[2],
mac->device[0], mac->device[1], mac->device[2],
version->major,
version->minor);
// Add tree item
index = model->addItem(model->offset(parent) + localOffset, Types::Region, Subtypes::GbeRegion, name, UString(), info, UByteArray(), gbe, UByteArray(), Fixed, parent);
return U_SUCCESS;
}
USTATUS FfsParser::parseMeRegion(const UByteArray & me, const UINT32 localOffset, const UModelIndex & parent, UModelIndex & index)
{
// Check sanity
if (me.isEmpty())
return U_EMPTY_REGION;
// Get info
UString name("ME region");
UString info = usprintf("Full size: %Xh (%u)", me.size(), me.size());
// Parse region
bool versionFound = true;
bool emptyRegion = false;
// Check for empty region
if (me.size() == me.count('\xFF') || me.size() == me.count('\x00')) {
// Further parsing not needed
emptyRegion = true;
info += ("\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 += ("\nVersion: unknown");
versionFound = false;
}
}
// Check sanity
if ((UINT32)me.size() < (UINT32)versionOffset + sizeof(ME_VERSION))
return U_INVALID_REGION;
// Add version information
if (versionFound) {
const ME_VERSION* version = (const ME_VERSION*)(me.constData() + versionOffset);
info += usprintf("\nVersion: %u.%u.%u.%u",
version->major,
version->minor,
version->bugfix,
version->build);
}
}
// Add tree item
index = model->addItem(model->offset(parent) + localOffset, Types::Region, Subtypes::MeRegion, name, UString(), info, UByteArray(), me, UByteArray(), Fixed, parent);
// Show messages
if (emptyRegion) {
msg(UString("parseMeRegion: ME region is empty"), index);
}
else if (!versionFound) {
msg(UString("parseMeRegion: ME version is unknown, it can be damaged"), index);
}
else {
meParser.parseMeRegionBody(index);
}
return U_SUCCESS;
}
USTATUS FfsParser::parsePdrRegion(const UByteArray & pdr, const UINT32 localOffset, const UModelIndex & parent, UModelIndex & index)
{
// Check sanity
if (pdr.isEmpty())
return U_EMPTY_REGION;
// Get info
UString name("PDR region");
UString info = usprintf("Full size: %Xh (%u)", pdr.size(), pdr.size());
// Add tree item
index = model->addItem(model->offset(parent) + localOffset, Types::Region, Subtypes::PdrRegion, name, UString(), info, UByteArray(), pdr, UByteArray(), Fixed, parent);
// Parse PDR region as BIOS space
UINT8 result = parseRawArea(index);
if (result && result != U_VOLUMES_NOT_FOUND && result != U_INVALID_VOLUME)
return result;
return U_SUCCESS;
}
USTATUS FfsParser::parseGeneralRegion(const UINT8 subtype, const UByteArray & region, const UINT32 localOffset, const UModelIndex & parent, UModelIndex & index)
{
// Check sanity
if (region.isEmpty())
return U_EMPTY_REGION;
// Get info
UString name = itemSubtypeToUString(Types::Region, subtype) + UString(" region");
UString info = usprintf("Full size: %Xh (%u)", region.size(), region.size());
// Add tree item
index = model->addItem(model->offset(parent) + localOffset, Types::Region, subtype, name, UString(), info, UByteArray(), region, UByteArray(), Fixed, parent);
return U_SUCCESS;
}
USTATUS FfsParser::parseBiosRegion(const UByteArray & bios, const UINT32 localOffset, const UModelIndex & parent, UModelIndex & index)
{
// Sanity check
if (bios.isEmpty())
return U_EMPTY_REGION;
// Get info
UString name("BIOS region");
UString info = usprintf("Full size: %Xh (%u)", bios.size(), bios.size());
// Add tree item
index = model->addItem(model->offset(parent) + localOffset, Types::Region, Subtypes::BiosRegion, name, UString(), info, UByteArray(), bios, UByteArray(), Fixed, parent);
return parseRawArea(index);
}
USTATUS FfsParser::parseRawArea(const UModelIndex & index)
{
// Sanity check
if (!index.isValid())
return U_INVALID_PARAMETER;
// Get parsing data
UINT32 headerSize = model->header(index).size();
UINT32 offset = model->offset(index) + headerSize;
// Get item data
UByteArray data = model->body(index);
// Search for first volume
USTATUS result;
UINT32 prevVolumeOffset;
result = findNextVolume(index, data, offset, 0, prevVolumeOffset);
if (result)
return result;
// First volume is not at the beginning of RAW area
UString name;
UString info;
if (prevVolumeOffset > 0) {
// Get info
UByteArray padding = data.left(prevVolumeOffset);
name = UString("Padding");
info = usprintf("Full size: %Xh (%u)", padding.size(), padding.size());
// Add tree item
model->addItem(offset, Types::Padding, getPaddingType(padding), name, UString(), info, UByteArray(), padding, UByteArray(), Fixed, index);
}
// Search for and parse all volumes
UINT32 volumeOffset = prevVolumeOffset;
UINT32 prevVolumeSize = 0;
while (!result)
{
// Padding between volumes
if (volumeOffset > prevVolumeOffset + prevVolumeSize) {
UINT32 paddingOffset = prevVolumeOffset + prevVolumeSize;
UINT32 paddingSize = volumeOffset - paddingOffset;
UByteArray padding = data.mid(paddingOffset, paddingSize);
// Get info
name = UString("Padding");
info = usprintf("Full size: %Xh (%u)", padding.size(), padding.size());
// Add tree item
model->addItem(offset + paddingOffset, Types::Padding, getPaddingType(padding), name, UString(), info, UByteArray(), padding, UByteArray(), Fixed, index);
}
// Get volume size
UINT32 volumeSize = 0;
UINT32 bmVolumeSize = 0;
result = getVolumeSize(data, volumeOffset, volumeSize, bmVolumeSize);
if (result) {
msg(UString("parseRawArea: getVolumeSize failed with error ") + errorCodeToUString(result), index);
return result;
}
// Check that volume is fully present in input
if (volumeSize > (UINT32)data.size() || volumeOffset + volumeSize > (UINT32)data.size()) {
// Mark the rest as padding and finish the parsing
UByteArray padding = data.mid(volumeOffset);
// Get info
name = UString("Padding");
info = usprintf("Full size: %Xh (%u)", padding.size(), padding.size());
// Add tree item
UModelIndex paddingIndex = model->addItem(offset + volumeOffset, Types::Padding, getPaddingType(padding), name, UString(), info, UByteArray(), padding, UByteArray(), Fixed, index);
msg(UString("parseRawArea: one of volumes inside overlaps the end of data"), paddingIndex);
// Update variables
prevVolumeOffset = volumeOffset;
prevVolumeSize = padding.size();
break;
}
// Parse current volume's header
UModelIndex volumeIndex;
UByteArray volume = data.mid(volumeOffset, volumeSize);
result = parseVolumeHeader(volume, headerSize + volumeOffset, index, volumeIndex);
if (result)
msg(UString("parseRawArea: volume header parsing failed with error ") + errorCodeToUString(result), index);
else {
// Show messages
if (volumeSize != bmVolumeSize)
msg(usprintf("parseRawArea: volume size stored in header %Xh (%u) differs from calculated using block map %Xh (%u)",
volumeSize, volumeSize,
bmVolumeSize, bmVolumeSize),
volumeIndex);
}
// Go to next volume
prevVolumeOffset = volumeOffset;
prevVolumeSize = volumeSize;
result = findNextVolume(index, data, offset, volumeOffset + prevVolumeSize, volumeOffset);
}
// Padding at the end of RAW area
volumeOffset = prevVolumeOffset + prevVolumeSize;
if ((UINT32)data.size() > volumeOffset) {
UByteArray padding = data.mid(volumeOffset);
// Get info
name = UString("Padding");
info = usprintf("Full size: %Xh (%u)", padding.size(), padding.size());
// Add tree item
model->addItem(offset + volumeOffset, Types::Padding, getPaddingType(padding), name, UString(), info, UByteArray(), padding, UByteArray(), Fixed, index);
}
// Parse bodies
for (int i = 0; i < model->rowCount(index); i++) {
UModelIndex current = index.child(i, 0);
switch (model->type(current)) {
case Types::Volume:
parseVolumeBody(current);
break;
case Types::Padding:
// No parsing required
break;
default:
return U_UNKNOWN_ITEM_TYPE;
}
}
return U_SUCCESS;
}
USTATUS FfsParser::parseVolumeHeader(const UByteArray & volume, const UINT32 localOffset, const UModelIndex & parent, UModelIndex & index)
{
// Sanity check
if (volume.isEmpty())
return U_INVALID_PARAMETER;
// Check that there is space for the volume header
if ((UINT32)volume.size() < sizeof(EFI_FIRMWARE_VOLUME_HEADER)) {
msg(usprintf("parseVolumeHeader: input volume size %Xh (%u) is smaller than volume header size 40h (64)", volume.size(), volume.size()));
return U_INVALID_VOLUME;
}
// Populate volume header
const EFI_FIRMWARE_VOLUME_HEADER* volumeHeader = (const EFI_FIRMWARE_VOLUME_HEADER*)(volume.constData());
// Check sanity of HeaderLength value
if ((UINT32)ALIGN8(volumeHeader->HeaderLength) > (UINT32)volume.size()) {
msg(UString("parseVolumeHeader: volume header overlaps the end of data"));
return U_INVALID_VOLUME;
}
// Check sanity of ExtHeaderOffset value
if (volumeHeader->Revision > 1 && volumeHeader->ExtHeaderOffset
&& (UINT32)ALIGN8(volumeHeader->ExtHeaderOffset + sizeof(EFI_FIRMWARE_VOLUME_EXT_HEADER)) > (UINT32)volume.size()) {
msg(UString("parseVolumeHeader: extended volume header overlaps the end of data"));
return U_INVALID_VOLUME;
}
// Calculate volume header size
UINT32 headerSize;
EFI_GUID extendedHeaderGuid = {0, 0, 0, {0, 0, 0, 0, 0, 0, 0, 0 }};
bool hasExtendedHeader = false;
if (volumeHeader->Revision > 1 && volumeHeader->ExtHeaderOffset) {
hasExtendedHeader = true;
const EFI_FIRMWARE_VOLUME_EXT_HEADER* extendedHeader = (const EFI_FIRMWARE_VOLUME_EXT_HEADER*)(volume.constData() + volumeHeader->ExtHeaderOffset);
headerSize = volumeHeader->ExtHeaderOffset + extendedHeader->ExtHeaderSize;
extendedHeaderGuid = extendedHeader->FvName;
}
else
headerSize = volumeHeader->HeaderLength;
// Extended header end can be unaligned
headerSize = ALIGN8(headerSize);
// Check for volume structure to be known
bool isUnknown = true;
bool isNvramVolume = false;
UINT8 ffsVersion = 0;
// Check for FFS v2 volume
UByteArray guid = UByteArray((const char*)&volumeHeader->FileSystemGuid, sizeof(EFI_GUID));
if (std::find(FFSv2Volumes.begin(), FFSv2Volumes.end(), guid) != FFSv2Volumes.end()) {
isUnknown = false;
ffsVersion = 2;
}
// Check for FFS v3 volume
if (std::find(FFSv3Volumes.begin(), FFSv3Volumes.end(), guid) != FFSv3Volumes.end()) {
isUnknown = false;
ffsVersion = 3;
}
// Check for VSS NVRAM volume
if (guid == NVRAM_MAIN_STORE_VOLUME_GUID || guid == NVRAM_ADDITIONAL_STORE_VOLUME_GUID) {
isUnknown = false;
isNvramVolume = true;
}
// Check volume revision and alignment
bool msgAlignmentBitsSet = false;
bool msgUnaligned = false;
bool msgUnknownRevision = false;
UINT32 alignment = 65536; // Default volume alignment is 64K
if (volumeHeader->Revision == 1) {
// Acquire alignment capability bit
bool alignmentCap = (volumeHeader->Attributes & EFI_FVB_ALIGNMENT_CAP) != 0;
if (!alignmentCap) {
if (volumeHeader->Attributes & 0xFFFF0000)
msgAlignmentBitsSet = true;
}
// Do not check for volume alignment on revision 1 volumes
// No one gives a single damn about setting it correctly
}
else if (volumeHeader->Revision == 2) {
// Acquire alignment
alignment = (UINT32)pow(2.0, (int)(volumeHeader->Attributes & EFI_FVB2_ALIGNMENT) >> 16);
// Check alignment
if (!isUnknown && !model->compressed(parent) && ((model->offset(parent) + localOffset - capsuleOffsetFixup) % alignment))
msgUnaligned = true;
}
else
msgUnknownRevision = true;
// Check attributes
// Determine value of empty byte
UINT8 emptyByte = volumeHeader->Attributes & EFI_FVB_ERASE_POLARITY ? '\xFF' : '\x00';
// Check for AppleCRC32 and AppleFreeSpaceOffset in ZeroVector
bool hasAppleCrc32 = false;
bool hasAppleFSO = false;
UINT32 volumeSize = volume.size();
UINT32 appleCrc32 = *(UINT32*)(volume.constData() + 8);
UINT32 appleFSO = *(UINT32*)(volume.constData() + 12);
if (appleCrc32 != 0) {
// Calculate CRC32 of the volume body
UINT32 crc = crc32(0, (const UINT8*)(volume.constData() + volumeHeader->HeaderLength), volumeSize - volumeHeader->HeaderLength);
if (crc == appleCrc32) {
hasAppleCrc32 = true;
}
// Check if FreeSpaceOffset is non-zero
if (appleFSO != 0) {
hasAppleFSO = true;
}
}
// Check header checksum by recalculating it
bool msgInvalidChecksum = false;
UByteArray tempHeader((const char*)volumeHeader, volumeHeader->HeaderLength);
((EFI_FIRMWARE_VOLUME_HEADER*)tempHeader.data())->Checksum = 0;
UINT16 calculated = calculateChecksum16((const UINT16*)tempHeader.constData(), volumeHeader->HeaderLength);
if (volumeHeader->Checksum != calculated)
msgInvalidChecksum = true;
// Get info
UByteArray header = volume.left(headerSize);
UByteArray body = volume.mid(headerSize);
UString name = guidToUString(volumeHeader->FileSystemGuid);
UString info = usprintf("ZeroVector:\n%02X %02X %02X %02X %02X %02X %02X %02X\n"
"%02X %02X %02X %02X %02X %02X %02X %02X\nSignature: _FVH\nFileSystem GUID: ",
volumeHeader->ZeroVector[0], volumeHeader->ZeroVector[1], volumeHeader->ZeroVector[2], volumeHeader->ZeroVector[3],
volumeHeader->ZeroVector[4], volumeHeader->ZeroVector[5], volumeHeader->ZeroVector[6], volumeHeader->ZeroVector[7],
volumeHeader->ZeroVector[8], volumeHeader->ZeroVector[9], volumeHeader->ZeroVector[10], volumeHeader->ZeroVector[11],
volumeHeader->ZeroVector[12], volumeHeader->ZeroVector[13], volumeHeader->ZeroVector[14], volumeHeader->ZeroVector[15])
+ guidToUString(volumeHeader->FileSystemGuid, false) \
+ usprintf("\nFull size: %Xh (%u)\nHeader size: %Xh (%u)\nBody size: %Xh (%u)\nRevision: %u\nAttributes: %08Xh\nErase polarity: %u\nChecksum: %04Xh",
volumeSize, volumeSize,
headerSize, headerSize,
volumeSize - headerSize, volumeSize - headerSize,
volumeHeader->Revision,
volumeHeader->Attributes,
(emptyByte ? 1 : 0),
volumeHeader->Checksum) +
(msgInvalidChecksum ? usprintf(", invalid, should be %04Xh", calculated) : UString(", valid"));
// Extended header present
if (volumeHeader->Revision > 1 && volumeHeader->ExtHeaderOffset) {
const EFI_FIRMWARE_VOLUME_EXT_HEADER* extendedHeader = (const EFI_FIRMWARE_VOLUME_EXT_HEADER*)(volume.constData() + volumeHeader->ExtHeaderOffset);
info += usprintf("\nExtended header size: %Xh (%u)\nVolume GUID: ",
extendedHeader->ExtHeaderSize, extendedHeader->ExtHeaderSize) + guidToUString(extendedHeader->FvName, false);
name = guidToUString(extendedHeader->FvName); // Replace FFS GUID with volume GUID
}
// Add text
UString text;
if (hasAppleCrc32)
text += UString("AppleCRC32 ");
if (hasAppleFSO)
text += UString("AppleFSO ");
// Add tree item
UINT8 subtype = Subtypes::UnknownVolume;
if (!isUnknown) {
if (ffsVersion == 2)
subtype = Subtypes::Ffs2Volume;
else if (ffsVersion == 3)
subtype = Subtypes::Ffs3Volume;
else if (isNvramVolume)
subtype = Subtypes::NvramVolume;
}
index = model->addItem(model->offset(parent) + localOffset, Types::Volume, subtype, name, text, info, header, body, UByteArray(), Fixed, parent);
// Set parsing data for created volume
VOLUME_PARSING_DATA pdata;
pdata.emptyByte = emptyByte;
pdata.ffsVersion = ffsVersion;
pdata.hasExtendedHeader = hasExtendedHeader ? TRUE : FALSE;
pdata.extendedHeaderGuid = extendedHeaderGuid;
pdata.alignment = alignment;
pdata.revision = volumeHeader->Revision;
pdata.hasAppleCrc32 = hasAppleCrc32;
pdata.hasAppleFSO = hasAppleFSO;
pdata.isWeakAligned = (volumeHeader->Revision > 1 && (volumeHeader->Attributes & EFI_FVB2_WEAK_ALIGNMENT));
model->setParsingData(index, UByteArray((const char*)&pdata, sizeof(pdata)));
// Show messages
if (isUnknown)
msg(UString("parseVolumeHeader: unknown file system ") + guidToUString(volumeHeader->FileSystemGuid), index);
if (msgInvalidChecksum)
msg(UString("parseVolumeHeader: volume header checksum is invalid"), index);
if (msgAlignmentBitsSet)
msg(UString("parseVolumeHeader: alignment bits set on volume without alignment capability"), index);
if (msgUnaligned)
msg(UString("parseVolumeHeader: unaligned volume"), index);
if (msgUnknownRevision)
msg(usprintf("parseVolumeHeader: unknown volume revision %u", volumeHeader->Revision), index);
return U_SUCCESS;
}
USTATUS FfsParser::findNextVolume(const UModelIndex & index, const UByteArray & bios, const UINT32 localOffset, const UINT32 volumeOffset, UINT32 & nextVolumeOffset)
{
int nextIndex = bios.indexOf(EFI_FV_SIGNATURE, volumeOffset);
if (nextIndex < EFI_FV_SIGNATURE_OFFSET)
return U_VOLUMES_NOT_FOUND;
// Check volume header to be sane
for (; nextIndex > 0; nextIndex = bios.indexOf(EFI_FV_SIGNATURE, nextIndex + 1)) {
const EFI_FIRMWARE_VOLUME_HEADER* volumeHeader = (const EFI_FIRMWARE_VOLUME_HEADER*)(bios.constData() + nextIndex - EFI_FV_SIGNATURE_OFFSET);
if (volumeHeader->FvLength < sizeof(EFI_FIRMWARE_VOLUME_HEADER) + 2 * sizeof(EFI_FV_BLOCK_MAP_ENTRY) || volumeHeader->FvLength >= 0xFFFFFFFFUL) {
msg(usprintf("findNextVolume: volume candidate at offset %Xh skipped, has invalid FvLength %" PRIX64 "h",
localOffset + (nextIndex - EFI_FV_SIGNATURE_OFFSET),
volumeHeader->FvLength), index);
continue;
}
if (volumeHeader->Revision != 1 && volumeHeader->Revision != 2) {
msg(usprintf("findNextVolume: volume candidate at offset %Xh skipped, has invalid Revision byte value %02Xh",
localOffset + (nextIndex - EFI_FV_SIGNATURE_OFFSET),
volumeHeader->Revision), index);
continue;
}
// All checks passed, volume found
break;
}
// No more volumes found
if (nextIndex < EFI_FV_SIGNATURE_OFFSET)
return U_VOLUMES_NOT_FOUND;
nextVolumeOffset = nextIndex - EFI_FV_SIGNATURE_OFFSET;
return U_SUCCESS;
}
USTATUS FfsParser::getVolumeSize(const UByteArray & bios, const 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 U_INVALID_VOLUME;
// Populate volume header
const EFI_FIRMWARE_VOLUME_HEADER* volumeHeader = (const EFI_FIRMWARE_VOLUME_HEADER*)(bios.constData() + volumeOffset);
// Check volume signature
if (UByteArray((const char*)&volumeHeader->Signature, sizeof(volumeHeader->Signature)) != EFI_FV_SIGNATURE)
return U_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 U_INVALID_VOLUME;
calcVolumeSize += entry->NumBlocks * entry->Length;
entry += 1;
}
volumeSize = (UINT32)volumeHeader->FvLength;
bmVolumeSize = calcVolumeSize;
if (volumeSize == 0)
return U_INVALID_VOLUME;
return U_SUCCESS;
}
USTATUS FfsParser::parseVolumeNonUefiData(const UByteArray & data, const UINT32 localOffset, const UModelIndex & index)
{
// Sanity check
if (!index.isValid())
return U_INVALID_PARAMETER;
// Get info
UString info = usprintf("Full size: %Xh (%u)", data.size(), data.size());
// Add padding tree item
UModelIndex paddingIndex = model->addItem(model->offset(index) + localOffset, Types::Padding, Subtypes::DataPadding, UString("Non-UEFI data"), UString(), info, UByteArray(), data, UByteArray(), Fixed, index);
msg(UString("parseVolumeNonUefiData: non-UEFI data found in volume's free space"), paddingIndex);
// Parse contents as RAW area
return parseRawArea(paddingIndex);
}
USTATUS FfsParser::parseVolumeBody(const UModelIndex & index)
{
// Sanity check
if (!index.isValid())
return U_INVALID_PARAMETER;
// Get volume header size and body
UByteArray volumeBody = model->body(index);
UINT32 volumeHeaderSize = model->header(index).size();
// Parse VSS NVRAM volumes with a dedicated function
if (model->subtype(index) == Subtypes::NvramVolume)
return nvramParser.parseNvramVolumeBody(index);
// Get required values from parsing data
UINT8 emptyByte = 0xFF;
UINT8 ffsVersion = 2;
if (model->hasEmptyParsingData(index) == false) {
UByteArray data = model->parsingData(index);
const VOLUME_PARSING_DATA* pdata = (const VOLUME_PARSING_DATA*)data.constData();
emptyByte = pdata->emptyByte;
ffsVersion = pdata->ffsVersion;
}
// Check for unknown FFS version
if (ffsVersion != 2 && ffsVersion != 3)
return U_SUCCESS;
// Search for and parse all files
UINT32 volumeBodySize = volumeBody.size();
UINT32 fileOffset = 0;
while (fileOffset < volumeBodySize) {
UINT32 fileSize = getFileSize(volumeBody, fileOffset, ffsVersion);
// Check file size
if (fileSize < sizeof(EFI_FFS_FILE_HEADER) || fileSize > volumeBodySize - fileOffset) {
// Check that we are at the empty space
UByteArray header = volumeBody.mid(fileOffset, sizeof(EFI_FFS_FILE_HEADER));
if (header.count(emptyByte) == header.size()) { //Empty space
// Check free space to be actually free
UByteArray freeSpace = volumeBody.mid(fileOffset);
if (freeSpace.count(emptyByte) != freeSpace.size()) {
// Search for the first non-empty byte
UINT32 i;
UINT32 size = freeSpace.size();
const UINT8* current = (UINT8*)freeSpace.constData();
for (i = 0; i < size; i++) {
if (*current++ != emptyByte)
break;
}
// Align found index to file alignment
// It must be possible because minimum 16 bytes of empty were found before
if (i != ALIGN8(i)) {
i = ALIGN8(i) - 8;
}
// Add all bytes before as free space
if (i > 0) {
UByteArray free = freeSpace.left(i);
// Get info
UString info = usprintf("Full size: %Xh (%u)", free.size(), free.size());
// Add free space item
model->addItem(model->offset(index) + volumeHeaderSize + fileOffset, Types::FreeSpace, 0, UString("Volume free space"), UString(), info, UByteArray(), free, UByteArray(), Movable, index);
}
// Parse non-UEFI data
parseVolumeNonUefiData(freeSpace.mid(i), volumeHeaderSize + fileOffset + i, index);
}
else {
// Get info
UString info = usprintf("Full size: %Xh (%u)", freeSpace.size(), freeSpace.size());
// Add free space item
model->addItem(model->offset(index) + volumeHeaderSize + fileOffset, Types::FreeSpace, 0, UString("Volume free space"), UString(), info, UByteArray(), freeSpace, UByteArray(), Movable, index);
}
break; // Exit from parsing loop
}
else { //File space
// Parse non-UEFI data
parseVolumeNonUefiData(volumeBody.mid(fileOffset), volumeHeaderSize + fileOffset, index);
break; // Exit from parsing loop
}
}
// Get file header
UByteArray file = volumeBody.mid(fileOffset, fileSize);
UByteArray header = file.left(sizeof(EFI_FFS_FILE_HEADER));
const EFI_FFS_FILE_HEADER* fileHeader = (const EFI_FFS_FILE_HEADER*)header.constData();
if (ffsVersion == 3 && (fileHeader->Attributes & FFS_ATTRIB_LARGE_FILE)) {
header = file.left(sizeof(EFI_FFS_FILE_HEADER2));
}
//Parse current file's header
UModelIndex fileIndex;
USTATUS result = parseFileHeader(file, volumeHeaderSize + fileOffset, index, fileIndex);
if (result)
msg(UString("parseVolumeBody: file header parsing failed with error ") + errorCodeToUString(result), index);
// Move to next file
fileOffset += fileSize;
fileOffset = ALIGN8(fileOffset);
}
// Check for duplicate GUIDs
for (int i = 0; i < model->rowCount(index); i++) {
UModelIndex current = index.child(i, 0);
// Skip non-file entries and pad files
if (model->type(current) != Types::File || model->subtype(current) == EFI_FV_FILETYPE_PAD)
continue;
// Get current file GUID
UByteArray currentGuid(model->header(current).constData(), sizeof(EFI_GUID));
// Check files after current for having an equal GUID
for (int j = i + 1; j < model->rowCount(index); j++) {
UModelIndex another = index.child(j, 0);
// Skip non-file entries
if (model->type(another) != Types::File)
continue;
// Get another file GUID
UByteArray anotherGuid(model->header(another).constData(), sizeof(EFI_GUID));
// Check GUIDs for being equal
if (currentGuid == anotherGuid) {
msg(UString("parseVolumeBody: file with duplicate GUID ") + guidToUString(*(EFI_GUID*)(anotherGuid.data())), another);
}
}
}
//Parse bodies
for (int i = 0; i < model->rowCount(index); i++) {
UModelIndex current = index.child(i, 0);
switch (model->type(current)) {
case Types::File:
parseFileBody(current);
break;
case Types::Padding:
case Types::FreeSpace:
// No parsing required
break;
default:
return U_UNKNOWN_ITEM_TYPE;
}
}
return U_SUCCESS;
}
UINT32 FfsParser::getFileSize(const UByteArray & volume, const UINT32 fileOffset, const UINT8 ffsVersion)
{
if (ffsVersion == 2) {
if ((UINT32)volume.size() < fileOffset + sizeof(EFI_FFS_FILE_HEADER))
return 0;
const EFI_FFS_FILE_HEADER* fileHeader = (const EFI_FFS_FILE_HEADER*)(volume.constData() + fileOffset);
return uint24ToUint32(fileHeader->Size);
}
else if (ffsVersion == 3) {
if ((UINT32)volume.size() < fileOffset + sizeof(EFI_FFS_FILE_HEADER2))
return 0;
const EFI_FFS_FILE_HEADER2* fileHeader = (const EFI_FFS_FILE_HEADER2*)(volume.constData() + fileOffset);
if (fileHeader->Attributes & FFS_ATTRIB_LARGE_FILE)
return fileHeader->ExtendedSize;
else
return uint24ToUint32(fileHeader->Size);
}
else
return 0;
}
USTATUS FfsParser::parseFileHeader(const UByteArray & file, const UINT32 localOffset, const UModelIndex & parent, UModelIndex & index)
{
// Sanity check
if (file.isEmpty())
return U_INVALID_PARAMETER;
if ((UINT32)file.size() < sizeof(EFI_FFS_FILE_HEADER))
return U_INVALID_FILE;
// Obtain required information from parent volume
UINT8 ffsVersion = 2;
bool isWeakAligned = false;
UINT32 volumeAlignment = 0xFFFFFFFF;
UINT8 volumeRevision = 2;
UModelIndex parentVolumeIndex = model->findParentOfType(parent, Types::Volume);
if (parentVolumeIndex.isValid() && model->hasEmptyParsingData(parentVolumeIndex) == false) {
UByteArray data = model->parsingData(parentVolumeIndex);
const VOLUME_PARSING_DATA* pdata = (const VOLUME_PARSING_DATA*)data.constData();
ffsVersion = pdata->ffsVersion;
volumeAlignment = pdata->alignment;
volumeRevision = pdata->revision;
}
// Get file header
UByteArray header = file.left(sizeof(EFI_FFS_FILE_HEADER));
const EFI_FFS_FILE_HEADER* fileHeader = (const EFI_FFS_FILE_HEADER*)header.constData();
if (ffsVersion == 3 && (fileHeader->Attributes & FFS_ATTRIB_LARGE_FILE)) {
if ((UINT32)file.size() < sizeof(EFI_FFS_FILE_HEADER2))
return U_INVALID_FILE;
header = file.left(sizeof(EFI_FFS_FILE_HEADER2));
}
// Check file alignment
bool msgUnalignedFile = false;
UINT8 alignmentPower = ffsAlignmentTable[(fileHeader->Attributes & FFS_ATTRIB_DATA_ALIGNMENT) >> 3];
UINT32 alignment = (UINT32)pow(2.0, alignmentPower);
if ((localOffset + header.size()) % alignment)
msgUnalignedFile = true;
// Check file alignment agains volume alignment
bool msgFileAlignmentIsGreaterThanVolumeAlignment = false;
if (!isWeakAligned && volumeAlignment < alignment)
msgFileAlignmentIsGreaterThanVolumeAlignment = true;
// Check header checksum
UByteArray tempHeader = header;
EFI_FFS_FILE_HEADER* tempFileHeader = (EFI_FFS_FILE_HEADER*)(tempHeader.data());
tempFileHeader->IntegrityCheck.Checksum.Header = 0;
tempFileHeader->IntegrityCheck.Checksum.File = 0;
UINT8 calculatedHeader = calculateChecksum8((const UINT8*)tempFileHeader, header.size() - 1);
bool msgInvalidHeaderChecksum = false;
if (fileHeader->IntegrityCheck.Checksum.Header != calculatedHeader)
msgInvalidHeaderChecksum = true;
// Check data checksum
// Data checksum must be calculated
bool msgInvalidDataChecksum = false;
UINT8 calculatedData = 0;
if (fileHeader->Attributes & FFS_ATTRIB_CHECKSUM) {
UINT32 bufferSize = file.size() - header.size();
// Exclude file tail from data checksum calculation
if (volumeRevision == 1 && (fileHeader->Attributes & FFS_ATTRIB_TAIL_PRESENT))
bufferSize -= sizeof(UINT16);
calculatedData = calculateChecksum8((const UINT8*)(file.constData() + header.size()), bufferSize);
if (fileHeader->IntegrityCheck.Checksum.File != calculatedData)
msgInvalidDataChecksum = true;
}
// Data checksum must be one of predefined values
else if (volumeRevision == 1 && fileHeader->IntegrityCheck.Checksum.File != FFS_FIXED_CHECKSUM) {
calculatedData = FFS_FIXED_CHECKSUM;
msgInvalidDataChecksum = true;
}
else if (volumeRevision == 2 && fileHeader->IntegrityCheck.Checksum.File != FFS_FIXED_CHECKSUM2) {
calculatedData = FFS_FIXED_CHECKSUM2;
msgInvalidDataChecksum = true;
}
// Check file type
bool msgUnknownType = false;
if (fileHeader->Type > EFI_FV_FILETYPE_MM_CORE_STANDALONE && fileHeader->Type != EFI_FV_FILETYPE_PAD) {
msgUnknownType = true;
};
// Get file body
UByteArray body = file.mid(header.size());
// Check for file tail presence
UByteArray tail;
bool msgInvalidTailValue = false;
if (volumeRevision == 1 && (fileHeader->Attributes & FFS_ATTRIB_TAIL_PRESENT)) {
//Check file tail;
UINT16 tailValue = *(UINT16*)body.right(sizeof(UINT16)).constData();
if (fileHeader->IntegrityCheck.TailReference != (UINT16)~tailValue)
msgInvalidTailValue = true;
// Get tail and remove it from file body
tail = body.right(sizeof(UINT16));
body = body.left(body.size() - sizeof(UINT16));
}
// Get info
UString name;
UString info;
if (fileHeader->Type != EFI_FV_FILETYPE_PAD)
name = guidToUString(fileHeader->Name);
else
name = UString("Pad-file");
info = UString("File GUID: ") + guidToUString(fileHeader->Name, false) +
usprintf("\nType: %02Xh\nAttributes: %02Xh\nFull size: %Xh (%u)\nHeader size: %Xh (%u)\nBody size: %Xh (%u)\nTail size: %Xh (%u)\nState: %02Xh",
fileHeader->Type,
fileHeader->Attributes,
header.size() + body.size() + tail.size(), header.size() + body.size() + tail.size(),
header.size(), header.size(),
body.size(), body.size(),
tail.size(), tail.size(),
fileHeader->State) +
usprintf("\nHeader checksum: %02Xh", fileHeader->IntegrityCheck.Checksum.Header) + (msgInvalidHeaderChecksum ? usprintf(", invalid, should be %02Xh", calculatedHeader) : UString(", valid")) +
usprintf("\nData checksum: %02Xh", fileHeader->IntegrityCheck.Checksum.File) + (msgInvalidDataChecksum ? usprintf(", invalid, should be %02Xh", calculatedData) : UString(", valid"));
UString text;
bool isVtf = false;
// Check if the file is a Volume Top File
if (UByteArray((const char*)&fileHeader->Name, sizeof(EFI_GUID)) == EFI_FFS_VOLUME_TOP_FILE_GUID) {
// Mark it as the last VTF
// This information will later be used to determine memory addresses of uncompressed image elements
// Because the last byte of the last VFT is mapped to 0xFFFFFFFF physical memory address
isVtf = true;
text = UString("Volume Top File");
}
// Construct fixed state
ItemFixedState fixed = (ItemFixedState)((fileHeader->Attributes & FFS_ATTRIB_FIXED) != 0);
// Add tree item
index = model->addItem(model->offset(parent) + localOffset, Types::File, fileHeader->Type, name, text, info, header, body, tail, fixed, parent);
// Set parsing data for created file
FILE_PARSING_DATA pdata;
pdata.emptyByte = (fileHeader->State & EFI_FILE_ERASE_POLARITY) ? 0xFF : 0x00;
pdata.guid = fileHeader->Name;
model->setParsingData(index, UByteArray((const char*)&pdata, sizeof(pdata)));
// Override lastVtf index, if needed
if (isVtf) {
lastVtf = index;
}
// Show messages
if (msgUnalignedFile)
msg(UString("parseFileHeader: unaligned file"), index);
if (msgFileAlignmentIsGreaterThanVolumeAlignment)
msg(usprintf("parseFileHeader: file alignment %Xh is greater than parent volume alignment %Xh", alignment, volumeAlignment), index);
if (msgInvalidHeaderChecksum)
msg(UString("parseFileHeader: invalid header checksum"), index);
if (msgInvalidDataChecksum)
msg(UString("parseFileHeader: invalid data checksum"), index);
if (msgInvalidTailValue)
msg(UString("parseFileHeader: invalid tail value"), index);
if (msgUnknownType)
msg(usprintf("parseFileHeader: unknown file type %02Xh", fileHeader->Type), index);
return U_SUCCESS;
}
UINT32 FfsParser::getSectionSize(const UByteArray & file, const UINT32 sectionOffset, const UINT8 ffsVersion)
{
if (ffsVersion == 2) {
if ((UINT32)file.size() < sectionOffset + sizeof(EFI_COMMON_SECTION_HEADER))
return 0;
const EFI_COMMON_SECTION_HEADER* sectionHeader = (const EFI_COMMON_SECTION_HEADER*)(file.constData() + sectionOffset);
return uint24ToUint32(sectionHeader->Size);
}
else if (ffsVersion == 3) {
if ((UINT32)file.size() < sectionOffset + sizeof(EFI_COMMON_SECTION_HEADER2))
return 0;
const EFI_COMMON_SECTION_HEADER2* sectionHeader = (const EFI_COMMON_SECTION_HEADER2*)(file.constData() + sectionOffset);
UINT32 size = uint24ToUint32(sectionHeader->Size);
if (size == EFI_SECTION2_IS_USED)
return sectionHeader->ExtendedSize;
else
return size;
}
else
return 0;
}
USTATUS FfsParser::parseFileBody(const UModelIndex & index)
{
// Sanity check
if (!index.isValid())
return U_INVALID_PARAMETER;
// Do not parse non-file bodies
if (model->type(index) != Types::File)
return U_SUCCESS;
// Parse pad-file body
if (model->subtype(index) == EFI_FV_FILETYPE_PAD)
return parsePadFileBody(index);
// Parse raw files as raw areas
if (model->subtype(index) == EFI_FV_FILETYPE_RAW || model->subtype(index) == EFI_FV_FILETYPE_ALL) {
// Parse NVAR store
if (UByteArray(model->header(index).constData(), sizeof(EFI_GUID)) == NVRAM_NVAR_STORE_FILE_GUID)
return nvramParser.parseNvarStore(index);
return parseRawArea(index);
}
// Parse sections
return parseSections(model->body(index), index, true);
}
USTATUS FfsParser::parsePadFileBody(const UModelIndex & index)
{
// Sanity check
if (!index.isValid())
return U_INVALID_PARAMETER;
// Check if all bytes of the file are empty
UByteArray body = model->body(index);
// Obtain required information from parent file
UINT8 emptyByte = 0xFF;
UModelIndex parentFileIndex = model->findParentOfType(index, Types::File);
if (parentFileIndex.isValid() && model->hasEmptyParsingData(parentFileIndex) == false) {
UByteArray data = model->parsingData(index);
const FILE_PARSING_DATA* pdata = (const FILE_PARSING_DATA*)data.constData();
emptyByte = pdata->emptyByte;
}
// Check if the while PAD file is empty
if (body.size() == body.count(emptyByte))
return U_SUCCESS;
// Search for the first non-empty byte
UINT32 nonEmptyByteOffset;
UINT32 size = body.size();
const UINT8* current = (const UINT8*)body.constData();
for (nonEmptyByteOffset = 0; nonEmptyByteOffset < size; nonEmptyByteOffset++) {
if (*current++ != emptyByte)
break;
}
// Add all bytes before as free space...
if (nonEmptyByteOffset >= 8) {
// Align free space to 8 bytes boundary
if (nonEmptyByteOffset != ALIGN8(nonEmptyByteOffset))
nonEmptyByteOffset = ALIGN8(nonEmptyByteOffset) - 8;
UByteArray free = body.left(nonEmptyByteOffset);
// Get info
UString info = usprintf("Full size: %Xh (%u)", free.size(), free.size());
// Add tree item
model->addItem(model->offset(index) + model->header(index).size(), Types::FreeSpace, 0, UString("Free space"), UString(), info, UByteArray(), free, UByteArray(), Movable, index);
}
else {
nonEmptyByteOffset = 0;
}
// ... and all bytes after as a padding
UByteArray padding = body.mid(nonEmptyByteOffset);
// Get info
UString info = usprintf("Full size: %Xh (%u)", padding.size(), padding.size());
// Add tree item
UModelIndex dataIndex = model->addItem(model->offset(index) + model->header(index).size() + nonEmptyByteOffset, Types::Padding, Subtypes::DataPadding, UString("Non-UEFI data"), UString(), info, UByteArray(), padding, UByteArray(), Fixed, index);
// Show message
msg(UString("parsePadFileBody: non-UEFI data found in pad-file"), dataIndex);
// Rename the file
model->setName(index, UString("Non-empty pad-file"));
return U_SUCCESS;
}
USTATUS FfsParser::parseSections(const UByteArray & sections, const UModelIndex & index, const bool insertIntoTree)
{
// Sanity check
if (!index.isValid())
return U_INVALID_PARAMETER;
// Search for and parse all sections
UINT32 bodySize = sections.size();
UINT32 headerSize = model->header(index).size();
UINT32 sectionOffset = 0;
USTATUS result = U_SUCCESS;
// Obtain required information from parent volume
UINT8 ffsVersion = 2;
UModelIndex parentVolumeIndex = model->findParentOfType(index, Types::Volume);
if (parentVolumeIndex.isValid() && model->hasEmptyParsingData(parentVolumeIndex) == false) {
UByteArray data = model->parsingData(parentVolumeIndex);
const VOLUME_PARSING_DATA* pdata = (const VOLUME_PARSING_DATA*)data.constData();
ffsVersion = pdata->ffsVersion;
}
while (sectionOffset < bodySize) {
// Get section size
UINT32 sectionSize = getSectionSize(sections, sectionOffset, ffsVersion);
// Check section size
if (sectionSize < sizeof(EFI_COMMON_SECTION_HEADER) || sectionSize > (bodySize - sectionOffset)) {
// Final parsing
if (insertIntoTree) {
// Add padding to fill the rest of sections
UByteArray padding = sections.mid(sectionOffset);
// Get info
UString info = usprintf("Full size: %Xh (%u)", padding.size(), padding.size());
// Add tree item
UModelIndex dataIndex = model->addItem(model->offset(index) + headerSize + sectionOffset, Types::Padding, Subtypes::DataPadding, UString("Non-UEFI data"), UString(), info, UByteArray(), padding, UByteArray(), Fixed, index);
// Show message
msg(UString("parseSections: non-UEFI data found in sections area"), dataIndex);
// Exit from parsing loop
break;
}
// Preparsing
else {
return U_INVALID_SECTION;
}
}
// Parse section header
UModelIndex sectionIndex;
result = parseSectionHeader(sections.mid(sectionOffset, sectionSize), headerSize + sectionOffset, index, sectionIndex, insertIntoTree);
if (result) {
if (insertIntoTree)
msg(UString("parseSections: section header parsing failed with error ") + errorCodeToUString(result), index);
else
return U_INVALID_SECTION;
}
// Move to next section
sectionOffset += sectionSize;
sectionOffset = ALIGN4(sectionOffset);
}
// Parse bodies, will be skipped if insertIntoTree is not required
for (int i = 0; i < model->rowCount(index); i++) {
UModelIndex current = index.child(i, 0);
switch (model->type(current)) {
case Types::Section:
parseSectionBody(current);
break;
case Types::Padding:
// No parsing required
break;
default:
return U_UNKNOWN_ITEM_TYPE;
}
}
return U_SUCCESS;
}
USTATUS FfsParser::parseSectionHeader(const UByteArray & section, const UINT32 localOffset, const UModelIndex & parent, UModelIndex & index, const bool insertIntoTree)
{
// Check sanity
if ((UINT32)section.size() < sizeof(EFI_COMMON_SECTION_HEADER))
return U_INVALID_SECTION;
const EFI_COMMON_SECTION_HEADER* sectionHeader = (const EFI_COMMON_SECTION_HEADER*)(section.constData());
switch (sectionHeader->Type) {
// Special
case EFI_SECTION_COMPRESSION: return parseCompressedSectionHeader(section, localOffset, parent, index, insertIntoTree);
case EFI_SECTION_GUID_DEFINED: return parseGuidedSectionHeader(section, localOffset, parent, index, insertIntoTree);
case EFI_SECTION_FREEFORM_SUBTYPE_GUID: return parseFreeformGuidedSectionHeader(section, localOffset, parent, index, insertIntoTree);
case EFI_SECTION_VERSION: return parseVersionSectionHeader(section, localOffset, parent, index, insertIntoTree);
case PHOENIX_SECTION_POSTCODE:
case INSYDE_SECTION_POSTCODE: return parsePostcodeSectionHeader(section, localOffset, parent, index, insertIntoTree);
// Common
case EFI_SECTION_DISPOSABLE:
case EFI_SECTION_DXE_DEPEX:
case EFI_SECTION_PEI_DEPEX:
case EFI_SECTION_MM_DEPEX:
case EFI_SECTION_PE32:
case EFI_SECTION_PIC:
case EFI_SECTION_TE:
case EFI_SECTION_COMPATIBILITY16:
case EFI_SECTION_USER_INTERFACE:
case EFI_SECTION_FIRMWARE_VOLUME_IMAGE:
case EFI_SECTION_RAW: return parseCommonSectionHeader(section, localOffset, parent, index, insertIntoTree);
// Unknown
default:
USTATUS result = parseCommonSectionHeader(section, localOffset, parent, index, insertIntoTree);
msg(usprintf("parseSectionHeader: section with unknown type %02Xh", sectionHeader->Type), index);
return result;
}
}
USTATUS FfsParser::parseCommonSectionHeader(const UByteArray & section, const UINT32 localOffset, const UModelIndex & parent, UModelIndex & index, const bool insertIntoTree)
{
// Check sanity
if ((UINT32)section.size() < sizeof(EFI_COMMON_SECTION_HEADER))
return U_INVALID_SECTION;
// Obtain required information from parent volume
UINT8 ffsVersion = 2;
UModelIndex parentVolumeIndex = model->findParentOfType(index, Types::Volume);
if (parentVolumeIndex.isValid() && model->hasEmptyParsingData(parentVolumeIndex) == false) {
UByteArray data = model->parsingData(parentVolumeIndex);
const VOLUME_PARSING_DATA* pdata = (const VOLUME_PARSING_DATA*)data.constData();
ffsVersion = pdata->ffsVersion;
}
// Obtain header fields
UINT32 headerSize;
UINT8 type;
const EFI_COMMON_SECTION_HEADER_APPLE* appleHeader = (const EFI_COMMON_SECTION_HEADER_APPLE*)(section.constData());
if ((UINT32)section.size() >= sizeof(EFI_COMMON_SECTION_HEADER_APPLE) && appleHeader->Reserved == EFI_SECTION_APPLE_USED) {
headerSize = sizeof(EFI_COMMON_SECTION_HEADER_APPLE);
type = appleHeader->Type;
}
else {
const EFI_COMMON_SECTION_HEADER* sectionHeader = (const EFI_COMMON_SECTION_HEADER*)(section.constData());
headerSize = sizeof(EFI_COMMON_SECTION_HEADER);
if (ffsVersion == 3 && uint24ToUint32(sectionHeader->Size) == EFI_SECTION2_IS_USED)
headerSize = sizeof(EFI_COMMON_SECTION_HEADER2);
type = sectionHeader->Type;
}
// Check sanity again
if ((UINT32)section.size() < headerSize)
return U_INVALID_SECTION;
UByteArray header = section.left(headerSize);
UByteArray body = section.mid(headerSize);
// Get info
UString name = sectionTypeToUString(type) + UString(" section");
UString info = usprintf("Type: %02Xh\nFull size: %Xh (%u)\nHeader size: %Xh (%u)\nBody size: %Xh (%u)",
type,
section.size(), section.size(),
headerSize, headerSize,
body.size(), body.size());
// Add tree item
if (insertIntoTree) {
index = model->addItem(model->offset(parent) + localOffset, Types::Section, type, name, UString(), info, header, body, UByteArray(), Movable, parent);
}
return U_SUCCESS;
}
USTATUS FfsParser::parseCompressedSectionHeader(const UByteArray & section, const UINT32 localOffset, const UModelIndex & parent, UModelIndex & index, const bool insertIntoTree)
{
// Check sanity
if ((UINT32)section.size() < sizeof(EFI_COMMON_SECTION_HEADER))
return U_INVALID_SECTION;
// Obtain required information from parent volume
UINT8 ffsVersion = 2;
UModelIndex parentVolumeIndex = model->findParentOfType(index, Types::Volume);
if (parentVolumeIndex.isValid() && model->hasEmptyParsingData(parentVolumeIndex) == false) {
UByteArray data = model->parsingData(parentVolumeIndex);
const VOLUME_PARSING_DATA* pdata = (const VOLUME_PARSING_DATA*)data.constData();
ffsVersion = pdata->ffsVersion;
}
// Obtain header fields
UINT32 headerSize;
UINT8 compressionType;
UINT32 uncompressedLength;
const EFI_COMMON_SECTION_HEADER* sectionHeader = (const EFI_COMMON_SECTION_HEADER*)(section.constData());
const EFI_COMMON_SECTION_HEADER2* section2Header = (const EFI_COMMON_SECTION_HEADER2*)(section.constData());
const EFI_COMMON_SECTION_HEADER_APPLE* appleHeader = (const EFI_COMMON_SECTION_HEADER_APPLE*)(section.constData());
if ((UINT32)section.size() >= sizeof(EFI_COMMON_SECTION_HEADER_APPLE) && appleHeader->Reserved == EFI_SECTION_APPLE_USED) { // Check for apple section
const EFI_COMPRESSION_SECTION_APPLE* appleSectionHeader = (const EFI_COMPRESSION_SECTION_APPLE*)(appleHeader + 1);
headerSize = sizeof(EFI_COMMON_SECTION_HEADER_APPLE) + sizeof(EFI_COMPRESSION_SECTION_APPLE);
compressionType = (UINT8)appleSectionHeader->CompressionType;
uncompressedLength = appleSectionHeader->UncompressedLength;
}
else if (ffsVersion == 3 && uint24ToUint32(sectionHeader->Size) == EFI_SECTION2_IS_USED) { // Check for extended header section
const EFI_COMPRESSION_SECTION* compressedSectionHeader = (const EFI_COMPRESSION_SECTION*)(section2Header + 1);
if ((UINT32)section.size() < sizeof(EFI_COMMON_SECTION_HEADER2) + sizeof(EFI_COMPRESSION_SECTION))
return U_INVALID_SECTION;
headerSize = sizeof(EFI_COMMON_SECTION_HEADER2) + sizeof(EFI_COMPRESSION_SECTION);
compressionType = compressedSectionHeader->CompressionType;
uncompressedLength = compressedSectionHeader->UncompressedLength;
}
else { // Normal section
const EFI_COMPRESSION_SECTION* compressedSectionHeader = (const EFI_COMPRESSION_SECTION*)(sectionHeader + 1);
headerSize = sizeof(EFI_COMMON_SECTION_HEADER) + sizeof(EFI_COMPRESSION_SECTION);
compressionType = compressedSectionHeader->CompressionType;
uncompressedLength = compressedSectionHeader->UncompressedLength;
}
// Check sanity again
if ((UINT32)section.size() < headerSize)
return U_INVALID_SECTION;
UByteArray header = section.left(headerSize);
UByteArray body = section.mid(headerSize);
// Get info
UString name = sectionTypeToUString(sectionHeader->Type) + UString(" section");
UString info = usprintf("Type: %02Xh\nFull size: %Xh (%u)\nHeader size: %Xh (%u)\nBody size: %Xh (%u)\nCompression type: %02Xh\nDecompressed size: %Xh (%u)",
sectionHeader->Type,
section.size(), section.size(),
headerSize, headerSize,
body.size(), body.size(),
compressionType,
uncompressedLength, uncompressedLength);
// Add tree item
if (insertIntoTree) {
index = model->addItem(model->offset(parent) + localOffset, Types::Section, sectionHeader->Type, name, UString(), info, header, body, UByteArray(), Movable, parent);
// Set section parsing data
COMPRESSED_SECTION_PARSING_DATA pdata;
pdata.compressionType = compressionType;
pdata.uncompressedSize = uncompressedLength;
model->setParsingData(index, UByteArray((const char*)&pdata, sizeof(pdata)));
}
return U_SUCCESS;
}
USTATUS FfsParser::parseGuidedSectionHeader(const UByteArray & section, const UINT32 localOffset, const UModelIndex & parent, UModelIndex & index, const bool insertIntoTree)
{
// Check sanity
if ((UINT32)section.size() < sizeof(EFI_COMMON_SECTION_HEADER))
return U_INVALID_SECTION;
// Obtain required information from parent volume
UINT8 ffsVersion = 2;
UModelIndex parentVolumeIndex = model->findParentOfType(index, Types::Volume);
if (parentVolumeIndex.isValid() && model->hasEmptyParsingData(parentVolumeIndex) == false) {
UByteArray data = model->parsingData(parentVolumeIndex);
const VOLUME_PARSING_DATA* pdata = (const VOLUME_PARSING_DATA*)data.constData();
ffsVersion = pdata->ffsVersion;
}
// Obtain header fields
UINT32 headerSize;
EFI_GUID guid;
UINT16 dataOffset;
UINT16 attributes;
const EFI_COMMON_SECTION_HEADER* sectionHeader = (const EFI_COMMON_SECTION_HEADER*)(section.constData());
const EFI_COMMON_SECTION_HEADER2* section2Header = (const EFI_COMMON_SECTION_HEADER2*)(section.constData());
const EFI_COMMON_SECTION_HEADER_APPLE* appleHeader = (const EFI_COMMON_SECTION_HEADER_APPLE*)(section.constData());
if ((UINT32)section.size() >= sizeof(EFI_COMMON_SECTION_HEADER_APPLE) && appleHeader->Reserved == EFI_SECTION_APPLE_USED) { // Check for apple section
const EFI_GUID_DEFINED_SECTION_APPLE* appleSectionHeader = (const EFI_GUID_DEFINED_SECTION_APPLE*)(appleHeader + 1);
headerSize = sizeof(EFI_COMMON_SECTION_HEADER_APPLE) + sizeof(EFI_GUID_DEFINED_SECTION_APPLE);
if ((UINT32)section.size() < headerSize)
return U_INVALID_SECTION;
guid = appleSectionHeader->SectionDefinitionGuid;
dataOffset = appleSectionHeader->DataOffset;
attributes = appleSectionHeader->Attributes;
}
else if (ffsVersion == 3 && uint24ToUint32(sectionHeader->Size) == EFI_SECTION2_IS_USED) { // Check for extended header section
const EFI_GUID_DEFINED_SECTION* guidDefinedSectionHeader = (const EFI_GUID_DEFINED_SECTION*)(section2Header + 1);
if ((UINT32)section.size() < sizeof(EFI_COMMON_SECTION_HEADER2) + sizeof(EFI_GUID_DEFINED_SECTION))
return U_INVALID_SECTION;
headerSize = sizeof(EFI_COMMON_SECTION_HEADER2) + sizeof(EFI_GUID_DEFINED_SECTION);
guid = guidDefinedSectionHeader->SectionDefinitionGuid;
dataOffset = guidDefinedSectionHeader->DataOffset;
attributes = guidDefinedSectionHeader->Attributes;
}
else { // Normal section
const EFI_GUID_DEFINED_SECTION* guidDefinedSectionHeader = (const EFI_GUID_DEFINED_SECTION*)(sectionHeader + 1);
headerSize = sizeof(EFI_COMMON_SECTION_HEADER) + sizeof(EFI_GUID_DEFINED_SECTION);
guid = guidDefinedSectionHeader->SectionDefinitionGuid;
dataOffset = guidDefinedSectionHeader->DataOffset;
attributes = guidDefinedSectionHeader->Attributes;
}
// Check sanity again
if ((UINT32)section.size() < headerSize)
return U_INVALID_SECTION;
// Check for special GUIDed sections
UString additionalInfo;
UByteArray baGuid((const char*)&guid, sizeof(EFI_GUID));
bool msgSignedSectionFound = false;
bool msgNoAuthStatusAttribute = false;
bool msgNoProcessingRequiredAttributeCompressed = false;
bool msgNoProcessingRequiredAttributeSigned = false;
bool msgInvalidCrc = false;
bool msgUnknownCertType = false;
bool msgUnknownCertSubtype = false;
if (baGuid == EFI_GUIDED_SECTION_CRC32) {
if ((attributes & EFI_GUIDED_SECTION_AUTH_STATUS_VALID) == 0) { // Check that AuthStatusValid attribute is set on compressed GUIDed sections
msgNoAuthStatusAttribute = true;
}
if ((UINT32)section.size() < headerSize + sizeof(UINT32))
return U_INVALID_SECTION;
UINT32 crc = *(UINT32*)(section.constData() + headerSize);
additionalInfo += UString("\nChecksum type: CRC32");
// Calculate CRC32 of section data
UINT32 calculated = crc32(0, (const UINT8*)section.constData() + dataOffset, section.size() - dataOffset);
if (crc == calculated) {
additionalInfo += usprintf("\nChecksum: %08Xh, valid", crc);
}
else {
additionalInfo += usprintf("\nChecksum: %08Xh, invalid, should be %08Xh", crc, calculated);
msgInvalidCrc = true;
}
// No need to change dataOffset here
}
else if (baGuid == EFI_GUIDED_SECTION_LZMA || baGuid == EFI_GUIDED_SECTION_LZMAF86 || baGuid == EFI_GUIDED_SECTION_TIANO) {
if ((attributes & EFI_GUIDED_SECTION_PROCESSING_REQUIRED) == 0) { // Check that ProcessingRequired attribute is set on compressed GUIDed sections
msgNoProcessingRequiredAttributeCompressed = true;
}
// No need to change dataOffset here
}
else if (baGuid == EFI_FIRMWARE_CONTENTS_SIGNED_GUID) {
if ((attributes & EFI_GUIDED_SECTION_PROCESSING_REQUIRED) == 0) { // Check that ProcessingRequired attribute is set on signed GUIDed sections
msgNoProcessingRequiredAttributeSigned = true;
}
// Get certificate type and length
if ((UINT32)section.size() < headerSize + sizeof(WIN_CERTIFICATE))
return U_INVALID_SECTION;
const WIN_CERTIFICATE* winCertificate = (const WIN_CERTIFICATE*)(section.constData() + headerSize);
UINT32 certLength = winCertificate->Length;
UINT16 certType = winCertificate->CertificateType;
// Adjust dataOffset
dataOffset += certLength;
// Check section size once again
if ((UINT32)section.size() < dataOffset)
return U_INVALID_SECTION;
// Check certificate type
if (certType == WIN_CERT_TYPE_EFI_GUID) {
additionalInfo += UString("\nCertificate type: UEFI");
// Get certificate GUID
const WIN_CERTIFICATE_UEFI_GUID* winCertificateUefiGuid = (const WIN_CERTIFICATE_UEFI_GUID*)(section.constData() + headerSize);
UByteArray certTypeGuid((const char*)&winCertificateUefiGuid->CertType, sizeof(EFI_GUID));
if (certTypeGuid == EFI_CERT_TYPE_RSA2048_SHA256_GUID) {
additionalInfo += UString("\nCertificate subtype: RSA2048/SHA256");
}
else {
additionalInfo += UString("\nCertificate subtype: unknown, GUID ") + guidToUString(winCertificateUefiGuid->CertType);
msgUnknownCertSubtype = true;
}
}
else {
additionalInfo += usprintf("\nCertificate type: unknown (%04Xh)", certType);
msgUnknownCertType = true;
}
msgSignedSectionFound = true;
}
UByteArray header = section.left(dataOffset);
UByteArray body = section.mid(dataOffset);
// Get info
UString name = guidToUString(guid);
UString info = UString("Section GUID: ") + guidToUString(guid, false) +
usprintf("\nType: %02Xh\nFull size: %Xh (%u)\nHeader size: %Xh (%u)\nBody size: %Xh (%u)\nData offset: %Xh\nAttributes: %04Xh",
sectionHeader->Type,
section.size(), section.size(),
header.size(), header.size(),
body.size(), body.size(),
dataOffset,
attributes);
// Append additional info
info += additionalInfo;
// Add tree item
if (insertIntoTree) {
index = model->addItem(model->offset(parent) + localOffset, Types::Section, sectionHeader->Type, name, UString(), info, header, body, UByteArray(), Movable, parent);
// Set parsing data
GUIDED_SECTION_PARSING_DATA pdata;
pdata.guid = guid;
model->setParsingData(index, UByteArray((const char*)&pdata, sizeof(pdata)));
// Show messages
if (msgSignedSectionFound)
msg(UString("parseGuidedSectionHeader: section signature may become invalid after any modification"), index);
if (msgNoAuthStatusAttribute)
msg(UString("parseGuidedSectionHeader: CRC32 GUIDed section without AuthStatusValid attribute"), index);
if (msgNoProcessingRequiredAttributeCompressed)
msg(UString("parseGuidedSectionHeader: compressed GUIDed section without ProcessingRequired attribute"), index);
if (msgNoProcessingRequiredAttributeSigned)
msg(UString("parseGuidedSectionHeader: signed GUIDed section without ProcessingRequired attribute"), index);
if (msgInvalidCrc)
msg(UString("parseGuidedSectionHeader: GUID defined section with invalid CRC32"), index);
if (msgUnknownCertType)
msg(UString("parseGuidedSectionHeader: signed GUIDed section with unknown type"), index);
if (msgUnknownCertSubtype)
msg(UString("parseGuidedSectionHeader: signed GUIDed section with unknown subtype"), index);
}
return U_SUCCESS;
}
USTATUS FfsParser::parseFreeformGuidedSectionHeader(const UByteArray & section, const UINT32 localOffset, const UModelIndex & parent, UModelIndex & index, const bool insertIntoTree)
{
// Check sanity
if ((UINT32)section.size() < sizeof(EFI_COMMON_SECTION_HEADER))
return U_INVALID_SECTION;
// Obtain required information from parent volume
UINT8 ffsVersion = 2;
UModelIndex parentVolumeIndex = model->findParentOfType(index, Types::Volume);
if (parentVolumeIndex.isValid() && model->hasEmptyParsingData(parentVolumeIndex) == false) {
UByteArray data = model->parsingData(parentVolumeIndex);
const VOLUME_PARSING_DATA* pdata = (const VOLUME_PARSING_DATA*)data.constData();
ffsVersion = pdata->ffsVersion;
}
// Obtain header fields
UINT32 headerSize;
EFI_GUID guid;
UINT8 type;
const EFI_COMMON_SECTION_HEADER* sectionHeader = (const EFI_COMMON_SECTION_HEADER*)(section.constData());
const EFI_COMMON_SECTION_HEADER2* section2Header = (const EFI_COMMON_SECTION_HEADER2*)(section.constData());
const EFI_COMMON_SECTION_HEADER_APPLE* appleHeader = (const EFI_COMMON_SECTION_HEADER_APPLE*)(section.constData());
if ((UINT32)section.size() >= sizeof(EFI_COMMON_SECTION_HEADER_APPLE) && appleHeader->Reserved == EFI_SECTION_APPLE_USED) { // Check for apple section
const EFI_FREEFORM_SUBTYPE_GUID_SECTION* appleSectionHeader = (const EFI_FREEFORM_SUBTYPE_GUID_SECTION*)(appleHeader + 1);
headerSize = sizeof(EFI_COMMON_SECTION_HEADER_APPLE) + sizeof(EFI_FREEFORM_SUBTYPE_GUID_SECTION);
guid = appleSectionHeader->SubTypeGuid;
type = appleHeader->Type;
}
else if (ffsVersion == 3 && uint24ToUint32(sectionHeader->Size) == EFI_SECTION2_IS_USED) { // Check for extended header section
const EFI_FREEFORM_SUBTYPE_GUID_SECTION* fsgSectionHeader = (const EFI_FREEFORM_SUBTYPE_GUID_SECTION*)(section2Header + 1);
if ((UINT32)section.size() < sizeof(EFI_COMMON_SECTION_HEADER2) + sizeof(EFI_FREEFORM_SUBTYPE_GUID_SECTION))
return U_INVALID_SECTION;
headerSize = sizeof(EFI_COMMON_SECTION_HEADER2) + sizeof(EFI_FREEFORM_SUBTYPE_GUID_SECTION);
guid = fsgSectionHeader->SubTypeGuid;
type = section2Header->Type;
}
else { // Normal section
const EFI_FREEFORM_SUBTYPE_GUID_SECTION* fsgSectionHeader = (const EFI_FREEFORM_SUBTYPE_GUID_SECTION*)(sectionHeader + 1);
headerSize = sizeof(EFI_COMMON_SECTION_HEADER) + sizeof(EFI_FREEFORM_SUBTYPE_GUID_SECTION);
guid = fsgSectionHeader->SubTypeGuid;
type = sectionHeader->Type;
}
// Check sanity again
if ((UINT32)section.size() < headerSize)
return U_INVALID_SECTION;
UByteArray header = section.left(headerSize);
UByteArray body = section.mid(headerSize);
// Get info
UString name = sectionTypeToUString(type) + (" section");
UString info = usprintf("Type: %02Xh\nFull size: %Xh (%u)\nHeader size: %Xh (%u)\nBody size: %Xh (%u)\nSubtype GUID: ",
type,
section.size(), section.size(),
header.size(), header.size(),
body.size(), body.size())
+ guidToUString(guid, false);
// Add tree item
if (insertIntoTree) {
index = model->addItem(model->offset(parent) + localOffset, Types::Section, type, name, UString(), info, header, body, UByteArray(), Movable, parent);
// Set parsing data
FREEFORM_GUIDED_SECTION_PARSING_DATA pdata;
pdata.guid = guid;
model->setParsingData(index, UByteArray((const char*)&pdata, sizeof(pdata)));
// Rename section
model->setName(index, guidToUString(guid));
}
return U_SUCCESS;
}
USTATUS FfsParser::parseVersionSectionHeader(const UByteArray & section, const UINT32 localOffset, const UModelIndex & parent, UModelIndex & index, const bool insertIntoTree)
{
// Check sanity
if ((UINT32)section.size() < sizeof(EFI_COMMON_SECTION_HEADER))
return U_INVALID_SECTION;
// Obtain required information from parent volume
UINT8 ffsVersion = 2;
UModelIndex parentVolumeIndex = model->findParentOfType(index, Types::Volume);
if (parentVolumeIndex.isValid() && model->hasEmptyParsingData(parentVolumeIndex) == false) {
UByteArray data = model->parsingData(parentVolumeIndex);
const VOLUME_PARSING_DATA* pdata = (const VOLUME_PARSING_DATA*)data.constData();
ffsVersion = pdata->ffsVersion;
}
// Obtain header fields
UINT32 headerSize;
UINT16 buildNumber;
UINT8 type;
const EFI_COMMON_SECTION_HEADER* sectionHeader = (const EFI_COMMON_SECTION_HEADER*)(section.constData());
const EFI_COMMON_SECTION_HEADER2* section2Header = (const EFI_COMMON_SECTION_HEADER2*)(section.constData());
const EFI_COMMON_SECTION_HEADER_APPLE* appleHeader = (const EFI_COMMON_SECTION_HEADER_APPLE*)(section.constData());
if ((UINT32)section.size() >= sizeof(EFI_COMMON_SECTION_HEADER_APPLE) && appleHeader->Reserved == EFI_SECTION_APPLE_USED) { // Check for apple section
const EFI_VERSION_SECTION* versionHeader = (const EFI_VERSION_SECTION*)(appleHeader + 1);
headerSize = sizeof(EFI_COMMON_SECTION_HEADER_APPLE) + sizeof(EFI_VERSION_SECTION);
buildNumber = versionHeader->BuildNumber;
type = appleHeader->Type;
}
else if (ffsVersion == 3 && uint24ToUint32(sectionHeader->Size) == EFI_SECTION2_IS_USED) { // Check for extended header section
const EFI_VERSION_SECTION* versionHeader = (const EFI_VERSION_SECTION*)(section2Header + 1);
headerSize = sizeof(EFI_COMMON_SECTION_HEADER2) + sizeof(EFI_VERSION_SECTION);
buildNumber = versionHeader->BuildNumber;
type = section2Header->Type;
}
else { // Normal section
const EFI_VERSION_SECTION* versionHeader = (const EFI_VERSION_SECTION*)(sectionHeader + 1);
headerSize = sizeof(EFI_COMMON_SECTION_HEADER) + sizeof(EFI_VERSION_SECTION);
buildNumber = versionHeader->BuildNumber;
type = sectionHeader->Type;
}
// Check sanity again
if ((UINT32)section.size() < headerSize)
return U_INVALID_SECTION;
UByteArray header = section.left(headerSize);
UByteArray body = section.mid(headerSize);
// Get info
UString name = sectionTypeToUString(type) + (" section");
UString info = usprintf("Type: %02Xh\nFull size: %Xh (%u)\nHeader size: %Xh (%u)\nBody size: %Xh (%u)\nBuild number: %u",
type,
section.size(), section.size(),
header.size(), header.size(),
body.size(), body.size(),
buildNumber);
// Add tree item
if (insertIntoTree) {
index = model->addItem(model->offset(parent) + localOffset, Types::Section, type, name, UString(), info, header, body, UByteArray(), Movable, parent);
}
return U_SUCCESS;
}
USTATUS FfsParser::parsePostcodeSectionHeader(const UByteArray & section, const UINT32 localOffset, const UModelIndex & parent, UModelIndex & index, const bool insertIntoTree)
{
// Check sanity
if ((UINT32)section.size() < sizeof(EFI_COMMON_SECTION_HEADER))
return U_INVALID_SECTION;
// Obtain required information from parent volume
UINT8 ffsVersion = 2;
UModelIndex parentVolumeIndex = model->findParentOfType(index, Types::Volume);
if (parentVolumeIndex.isValid() && model->hasEmptyParsingData(parentVolumeIndex) == false) {
UByteArray data = model->parsingData(parentVolumeIndex);
const VOLUME_PARSING_DATA* pdata = (const VOLUME_PARSING_DATA*)data.constData();
ffsVersion = pdata->ffsVersion;
}
// Obtain header fields
UINT32 headerSize;
UINT32 postCode;
UINT8 type;
const EFI_COMMON_SECTION_HEADER* sectionHeader = (const EFI_COMMON_SECTION_HEADER*)(section.constData());
const EFI_COMMON_SECTION_HEADER2* section2Header = (const EFI_COMMON_SECTION_HEADER2*)(section.constData());
const EFI_COMMON_SECTION_HEADER_APPLE* appleHeader = (const EFI_COMMON_SECTION_HEADER_APPLE*)(section.constData());
if ((UINT32)section.size() >= sizeof(EFI_COMMON_SECTION_HEADER_APPLE) && appleHeader->Reserved == EFI_SECTION_APPLE_USED) { // Check for apple section
const POSTCODE_SECTION* postcodeHeader = (const POSTCODE_SECTION*)(appleHeader + 1);
headerSize = sizeof(EFI_COMMON_SECTION_HEADER_APPLE) + sizeof(POSTCODE_SECTION);
postCode = postcodeHeader->Postcode;
type = appleHeader->Type;
}
else if (ffsVersion == 3 && uint24ToUint32(sectionHeader->Size) == EFI_SECTION2_IS_USED) { // Check for extended header section
const POSTCODE_SECTION* postcodeHeader = (const POSTCODE_SECTION*)(section2Header + 1);
headerSize = sizeof(EFI_COMMON_SECTION_HEADER2) + sizeof(POSTCODE_SECTION);
postCode = postcodeHeader->Postcode;
type = section2Header->Type;
}
else { // Normal section
const POSTCODE_SECTION* postcodeHeader = (const POSTCODE_SECTION*)(sectionHeader + 1);
headerSize = sizeof(EFI_COMMON_SECTION_HEADER) + sizeof(POSTCODE_SECTION);
postCode = postcodeHeader->Postcode;
type = sectionHeader->Type;
}
// Check sanity again
if ((UINT32)section.size() < headerSize)
return U_INVALID_SECTION;
UByteArray header = section.left(headerSize);
UByteArray body = section.mid(headerSize);
// Get info
UString name = sectionTypeToUString(type) + (" section");
UString info = usprintf("Type: %02Xh\nFull size: %Xh (%u)\nHeader size: %Xh (%u)\nBody size: %Xh (%u)\nPostcode: %Xh",
type,
section.size(), section.size(),
header.size(), header.size(),
body.size(), body.size(),
postCode);
// Add tree item
if (insertIntoTree) {
index = model->addItem(model->offset(parent) + localOffset, Types::Section, sectionHeader->Type, name, UString(), info, header, body, UByteArray(), Movable, parent);
}
return U_SUCCESS;
}
USTATUS FfsParser::parseSectionBody(const UModelIndex & index)
{
// Sanity check
if (!index.isValid())
return U_INVALID_PARAMETER;
UByteArray header = model->header(index);
if ((UINT32)header.size() < sizeof(EFI_COMMON_SECTION_HEADER))
return U_INVALID_SECTION;
const EFI_COMMON_SECTION_HEADER* sectionHeader = (const EFI_COMMON_SECTION_HEADER*)(header.constData());
switch (sectionHeader->Type) {
// Encapsulation
case EFI_SECTION_COMPRESSION: return parseCompressedSectionBody(index);
case EFI_SECTION_GUID_DEFINED: return parseGuidedSectionBody(index);
case EFI_SECTION_DISPOSABLE: return parseSections(model->body(index), index, true);
// Leaf
case EFI_SECTION_FREEFORM_SUBTYPE_GUID: return parseRawArea(index);
case EFI_SECTION_VERSION: return parseVersionSectionBody(index);
case EFI_SECTION_DXE_DEPEX:
case EFI_SECTION_PEI_DEPEX:
case EFI_SECTION_MM_DEPEX: return parseDepexSectionBody(index);
case EFI_SECTION_TE: return parseTeImageSectionBody(index);
case EFI_SECTION_PE32:
case EFI_SECTION_PIC: return parsePeImageSectionBody(index);
case EFI_SECTION_USER_INTERFACE: return parseUiSectionBody(index);
case EFI_SECTION_FIRMWARE_VOLUME_IMAGE: return parseRawArea(index);
case EFI_SECTION_RAW: return parseRawSectionBody(index);
// No parsing needed
case EFI_SECTION_COMPATIBILITY16:
case PHOENIX_SECTION_POSTCODE:
case INSYDE_SECTION_POSTCODE:
default:
return U_SUCCESS;
}
}
USTATUS FfsParser::parseCompressedSectionBody(const UModelIndex & index)
{
// Sanity check
if (!index.isValid())
return U_INVALID_PARAMETER;
// Obtain required information from parsing data
UINT8 compressionType = EFI_NOT_COMPRESSED;
UINT32 uncompressedSize = model->body(index).size();
if (model->hasEmptyParsingData(index) == false) {
UByteArray data = model->parsingData(index);
const COMPRESSED_SECTION_PARSING_DATA* pdata = (const COMPRESSED_SECTION_PARSING_DATA*)data.constData();
compressionType = pdata->compressionType;
uncompressedSize = pdata->uncompressedSize;
}
// Decompress section
UINT8 algorithm = COMPRESSION_ALGORITHM_NONE;
UByteArray decompressed;
UByteArray efiDecompressed;
USTATUS result = decompress(model->body(index), compressionType, algorithm, decompressed, efiDecompressed);
if (result) {
msg(UString("parseCompressedSectionBody: decompression failed with error ") + errorCodeToUString(result), index);
return U_SUCCESS;
}
// Check reported uncompressed size
if (uncompressedSize != (UINT32)decompressed.size()) {
msg(usprintf("parseCompressedSectionBody: decompressed size stored in header %Xh (%u) differs from actual %Xh (%u)",
uncompressedSize, uncompressedSize,
decompressed.size(), decompressed.size()),
index);
model->addInfo(index, usprintf("\nActual decompressed size: %Xh (%u)", decompressed.size(), decompressed.size()));
}
// Check for undecided compression algorithm, this is a special case
if (algorithm == COMPRESSION_ALGORITHM_UNDECIDED) {
// Try preparse of sections decompressed with Tiano algorithm
if (U_SUCCESS == parseSections(decompressed, index, false)) {
algorithm = COMPRESSION_ALGORITHM_TIANO;
}
// Try preparse of sections decompressed with EFI 1.1 algorithm
else if (U_SUCCESS == parseSections(efiDecompressed, index, false)) {
algorithm = COMPRESSION_ALGORITHM_EFI11;
decompressed = efiDecompressed;
}
else {
msg(UString("parseCompressedSectionBody: can't guess the correct decompression algorithm, both preparse steps are failed"), index);
}
}
// Add info
model->addInfo(index, UString("\nCompression algorithm: ") + compressionTypeToUString(algorithm));
// Update parsing data
COMPRESSED_SECTION_PARSING_DATA pdata;
pdata.algorithm = algorithm;
pdata.compressionType = compressionType;
pdata.uncompressedSize = uncompressedSize;
model->setParsingData(index, UByteArray((const char*)&pdata, sizeof(pdata)));
if (algorithm != COMPRESSION_ALGORITHM_NONE)
model->setCompressed(index, true);
// Parse decompressed data
return parseSections(decompressed, index, true);
}
USTATUS FfsParser::parseGuidedSectionBody(const UModelIndex & index)
{
// Sanity check
if (!index.isValid())
return U_INVALID_PARAMETER;
// Obtain required information from parsing data
EFI_GUID guid = { 0, 0, 0, {0, 0, 0, 0, 0, 0, 0, 0 }};
if (model->hasEmptyParsingData(index) == false) {
UByteArray data = model->parsingData(index);
const GUIDED_SECTION_PARSING_DATA* pdata = (const GUIDED_SECTION_PARSING_DATA*)data.constData();
guid = pdata->guid;
}
// Check if section requires processing
UByteArray processed = model->body(index);
UByteArray efiDecompressed;
UString info;
bool parseCurrentSection = true;
UINT8 algorithm = COMPRESSION_ALGORITHM_NONE;
UByteArray baGuid = UByteArray((const char*)&guid, sizeof(EFI_GUID));
// Tiano compressed section
if (baGuid == EFI_GUIDED_SECTION_TIANO) {
USTATUS result = decompress(model->body(index), EFI_STANDARD_COMPRESSION, algorithm, processed, efiDecompressed);
if (result) {
msg(UString("parseGuidedSectionBody: decompression failed with error ") + errorCodeToUString(result), index);
return U_SUCCESS;
}
// Check for undecided compression algorithm, this is a special case
if (algorithm == COMPRESSION_ALGORITHM_UNDECIDED) {
// Try preparse of sections decompressed with Tiano algorithm
if (U_SUCCESS == parseSections(processed, index, false)) {
algorithm = COMPRESSION_ALGORITHM_TIANO;
}
// Try preparse of sections decompressed with EFI 1.1 algorithm
else if (U_SUCCESS == parseSections(efiDecompressed, index, false)) {
algorithm = COMPRESSION_ALGORITHM_EFI11;
processed = efiDecompressed;
}
else {
msg(UString("parseGuidedSectionBody: can't guess the correct decompression algorithm, both preparse steps are failed"), index);
parseCurrentSection = false;
}
}
info += UString("\nCompression algorithm: ") + compressionTypeToUString(algorithm);
info += usprintf("\nDecompressed size: %Xh (%u)", processed.size(), processed.size());
}
// LZMA compressed section
else if (baGuid == EFI_GUIDED_SECTION_LZMA || baGuid == EFI_GUIDED_SECTION_LZMAF86) {
USTATUS result = decompress(model->body(index), EFI_CUSTOMIZED_COMPRESSION, algorithm, processed, efiDecompressed);
if (result) {
msg(UString("parseGuidedSectionBody: decompression failed with error ") + errorCodeToUString(result), index);
return U_SUCCESS;
}
if (algorithm == COMPRESSION_ALGORITHM_LZMA) {
info += UString("\nCompression algorithm: LZMA");
info += usprintf("\nDecompressed size: %Xh (%u)", processed.size(), processed.size());
}
else {
info += UString("\nCompression algorithm: unknown");
parseCurrentSection = false;
}
}
// Add info
model->addInfo(index, info);
// Update data
if (algorithm != COMPRESSION_ALGORITHM_NONE)
model->setCompressed(index, true);
if (!parseCurrentSection) {
msg(UString("parseGuidedSectionBody: GUID defined section can not be processed"), index);
return U_SUCCESS;
}
return parseSections(processed, index, true);
}
USTATUS FfsParser::parseVersionSectionBody(const UModelIndex & index)
{
// Sanity check
if (!index.isValid())
return U_INVALID_PARAMETER;
// Add info
model->addInfo(index, UString("\nVersion string: ") + UString::fromUtf16((const CHAR16*)model->body(index).constData()));
return U_SUCCESS;
}
USTATUS FfsParser::parseDepexSectionBody(const UModelIndex & index)
{
// Sanity check
if (!index.isValid())
return U_INVALID_PARAMETER;
UByteArray body = model->body(index);
UString parsed;
// Check data to be present
if (body.size() < 2) { // 2 is a minimal sane value, i.e TRUE + END
msg(UString("parseDepexSectionBody: DEPEX section too short"), index);
return U_DEPEX_PARSE_FAILED;
}
const EFI_GUID * guid;
const UINT8* current = (const UINT8*)body.constData();
// Special cases of first opcode
switch (*current) {
case EFI_DEP_BEFORE:
if (body.size() != 2 * EFI_DEP_OPCODE_SIZE + sizeof(EFI_GUID)) {
msg(UString("parseDepexSectionBody: DEPEX section too long for a section starting with BEFORE opcode"), index);
return U_SUCCESS;
}
guid = (const EFI_GUID*)(current + EFI_DEP_OPCODE_SIZE);
parsed += UString("\nBEFORE ") + guidToUString(*guid);
current += EFI_DEP_OPCODE_SIZE + sizeof(EFI_GUID);
if (*current != EFI_DEP_END){
msg(UString("parseDepexSectionBody: DEPEX section ends with non-END opcode"), index);
return U_SUCCESS;
}
return U_SUCCESS;
case EFI_DEP_AFTER:
if (body.size() != 2 * EFI_DEP_OPCODE_SIZE + sizeof(EFI_GUID)){
msg(UString("parseDepexSectionBody: DEPEX section too long for a section starting with AFTER opcode"), index);
return U_SUCCESS;
}
guid = (const EFI_GUID*)(current + EFI_DEP_OPCODE_SIZE);
parsed += UString("\nAFTER ") + guidToUString(*guid);
current += EFI_DEP_OPCODE_SIZE + sizeof(EFI_GUID);
if (*current != EFI_DEP_END) {
msg(UString("parseDepexSectionBody: DEPEX section ends with non-END opcode"), index);
return U_SUCCESS;
}
return U_SUCCESS;
case EFI_DEP_SOR:
if (body.size() <= 2 * EFI_DEP_OPCODE_SIZE) {
msg(UString("parseDepexSectionBody: DEPEX section too short for a section starting with SOR opcode"), index);
return U_SUCCESS;
}
parsed += UString("\nSOR");
current += EFI_DEP_OPCODE_SIZE;
break;
}
// Parse the rest of depex
while (current - (const UINT8*)body.constData() < body.size()) {
switch (*current) {
case EFI_DEP_BEFORE: {
msg(UString("parseDepexSectionBody: misplaced BEFORE opcode"), index);
return U_SUCCESS;
}
case EFI_DEP_AFTER: {
msg(UString("parseDepexSectionBody: misplaced AFTER opcode"), index);
return U_SUCCESS;
}
case EFI_DEP_SOR: {
msg(UString("parseDepexSectionBody: misplaced SOR opcode"), index);
return U_SUCCESS;
}
case EFI_DEP_PUSH:
// Check that the rest of depex has correct size
if ((UINT32)body.size() - (UINT32)(current - (const UINT8*)body.constData()) <= EFI_DEP_OPCODE_SIZE + sizeof(EFI_GUID)) {
parsed.clear();
msg(UString("parseDepexSectionBody: remains of DEPEX section too short for PUSH opcode"), index);
return U_SUCCESS;
}
guid = (const EFI_GUID*)(current + EFI_DEP_OPCODE_SIZE);
parsed += UString("\nPUSH ") + guidToUString(*guid);
current += EFI_DEP_OPCODE_SIZE + sizeof(EFI_GUID);
break;
case EFI_DEP_AND:
parsed += UString("\nAND");
current += EFI_DEP_OPCODE_SIZE;
break;
case EFI_DEP_OR:
parsed += UString("\nOR");
current += EFI_DEP_OPCODE_SIZE;
break;
case EFI_DEP_NOT:
parsed += UString("\nNOT");
current += EFI_DEP_OPCODE_SIZE;
break;
case EFI_DEP_TRUE:
parsed += UString("\nTRUE");
current += EFI_DEP_OPCODE_SIZE;
break;
case EFI_DEP_FALSE:
parsed += UString("\nFALSE");
current += EFI_DEP_OPCODE_SIZE;
break;
case EFI_DEP_END:
parsed += UString("\nEND");
current += EFI_DEP_OPCODE_SIZE;
// Check that END is the last opcode
if (current - (const UINT8*)body.constData() < body.size()) {
parsed.clear();
msg(UString("parseDepexSectionBody: DEPEX section ends with non-END opcode"), index);
}
break;
default:
msg(UString("parseDepexSectionBody: unknown opcode"), index);
return U_SUCCESS;
break;
}
}
// Add info
model->addInfo(index, UString("\nParsed expression:") + parsed);
return U_SUCCESS;
}
USTATUS FfsParser::parseUiSectionBody(const UModelIndex & index)
{
// Sanity check
if (!index.isValid())
return U_INVALID_PARAMETER;
UString text = UString::fromUtf16((const CHAR16*)model->body(index).constData());
// Add info
model->addInfo(index, UString("\nText: ") + text);
// Rename parent file
model->setText(model->findParentOfType(index, Types::File), text);
return U_SUCCESS;
}
USTATUS FfsParser::parseAprioriRawSection(const UByteArray & body, UString & parsed)
{
// Sanity check
if (body.size() % sizeof(EFI_GUID)) {
msg(UString("parseAprioriRawSection: apriori file has size is not a multiple of 16"));
}
parsed.clear();
UINT32 count = body.size() / sizeof(EFI_GUID);
if (count > 0) {
for (UINT32 i = 0; i < count; i++) {
const EFI_GUID* guid = (const EFI_GUID*)body.constData() + i;
parsed += UString("\n") + guidToUString(*guid);
}
}
return U_SUCCESS;
}
USTATUS FfsParser::parseRawSectionBody(const UModelIndex & index)
{
// Sanity check
if (!index.isValid())
return U_INVALID_PARAMETER;
// Check for apriori file
UModelIndex parentFile = model->findParentOfType(index, Types::File);
if (!parentFile.isValid())
return U_INVALID_FILE; //TODO: better return code
// Get parent file parsing data
UByteArray parentFileGuid(model->header(parentFile).constData(), sizeof(EFI_GUID));
if (parentFileGuid == EFI_PEI_APRIORI_FILE_GUID) { // PEI apriori file
// Parse apriori file list
UString str;
USTATUS result = parseAprioriRawSection(model->body(index), str);
if (!result && !str.isEmpty())
model->addInfo(index, UString("\nFile list:") + str);
// Set parent file text
model->setText(parentFile, UString("PEI apriori file"));
return U_SUCCESS;
}
else if (parentFileGuid == EFI_DXE_APRIORI_FILE_GUID) { // DXE apriori file
// Parse apriori file list
UString str;
USTATUS result = parseAprioriRawSection(model->body(index), str);
if (!result && !str.isEmpty())
model->addInfo(index, UString("\nFile list:") + str);
// Set parent file text
model->setText(parentFile, UString("DXE apriori file"));
return U_SUCCESS;
}
else if (parentFileGuid == NVRAM_NVAR_EXTERNAL_DEFAULTS_FILE_GUID) { // AMI NVRAM external defaults
// Parse NVAR area
nvramParser.parseNvarStore(index);
// Set parent file text
model->setText(parentFile, UString("NVRAM external defaults"));
}
// Parse as raw area
return parseRawArea(index);
}
USTATUS FfsParser::parsePeImageSectionBody(const UModelIndex & index)
{
// Sanity check
if (!index.isValid())
return U_INVALID_PARAMETER;
// Get section body
UByteArray body = model->body(index);
if ((UINT32)body.size() < sizeof(EFI_IMAGE_DOS_HEADER)) {
msg(UString("parsePeImageSectionBody: section body size is smaller than DOS header size"), index);
return U_SUCCESS;
}
UString info;
const EFI_IMAGE_DOS_HEADER* dosHeader = (const EFI_IMAGE_DOS_HEADER*)body.constData();
if (dosHeader->e_magic != EFI_IMAGE_DOS_SIGNATURE) {
info += usprintf("\nDOS signature: %04Xh, invalid", dosHeader->e_magic);
msg(UString("parsePeImageSectionBody: PE32 image with invalid DOS signature"), index);
model->addInfo(index, info);
return U_SUCCESS;
}
const EFI_IMAGE_PE_HEADER* peHeader = (EFI_IMAGE_PE_HEADER*)(body.constData() + dosHeader->e_lfanew);
if (body.size() < (UINT8*)peHeader - (UINT8*)dosHeader) {
info += UString("\nDOS header: invalid");
msg(UString("parsePeImageSectionBody: PE32 image with invalid DOS header"), index);
model->addInfo(index, info);
return U_SUCCESS;
}
if (peHeader->Signature != EFI_IMAGE_PE_SIGNATURE) {
info += usprintf("\nPE signature: %08Xh, invalid", peHeader->Signature);
msg(UString("parsePeImageSectionBody: PE32 image with invalid PE signature"), index);
model->addInfo(index, info);
return U_SUCCESS;
}
const EFI_IMAGE_FILE_HEADER* imageFileHeader = (const EFI_IMAGE_FILE_HEADER*)(peHeader + 1);
if (body.size() < (UINT8*)imageFileHeader - (UINT8*)dosHeader) {
info += UString("\nPE header: invalid");
msg(UString("parsePeImageSectionBody: PE32 image with invalid PE header"), index);
model->addInfo(index, info);
return U_SUCCESS;
}
info += usprintf("\nDOS signature: %04Xh\nPE signature: %08Xh",
dosHeader->e_magic,
peHeader->Signature) +
UString("\nMachine type: ") + machineTypeToUString(imageFileHeader->Machine) +
usprintf("\nNumber of sections: %u\nCharacteristics: %04Xh",
imageFileHeader->NumberOfSections,
imageFileHeader->Characteristics);
EFI_IMAGE_OPTIONAL_HEADER_POINTERS_UNION optionalHeader;
optionalHeader.H32 = (const EFI_IMAGE_OPTIONAL_HEADER32*)(imageFileHeader + 1);
if (body.size() < (UINT8*)optionalHeader.H32 - (UINT8*)dosHeader) {
info += UString("\nPE optional header: invalid");
msg(UString("parsePeImageSectionBody: PE32 image with invalid PE optional header"), index);
model->addInfo(index, info);
return U_SUCCESS;
}
if (optionalHeader.H32->Magic == EFI_IMAGE_PE_OPTIONAL_HDR32_MAGIC) {
info += usprintf("\nOptional header signature: %04Xh\nSubsystem: %04Xh\nAddress of entry point: %Xh\nBase of code: %Xh\nImage base: %Xh",
optionalHeader.H32->Magic,
optionalHeader.H32->Subsystem,
optionalHeader.H32->AddressOfEntryPoint,
optionalHeader.H32->BaseOfCode,
optionalHeader.H32->ImageBase);
}
else if (optionalHeader.H32->Magic == EFI_IMAGE_PE_OPTIONAL_HDR64_MAGIC) {
info += usprintf("\nOptional header signature: %04Xh\nSubsystem: %04Xh\nAddress of entry point: %Xh\nBase of code: %Xh\nImage base: %" PRIX64 "h",
optionalHeader.H64->Magic,
optionalHeader.H64->Subsystem,
optionalHeader.H64->AddressOfEntryPoint,
optionalHeader.H64->BaseOfCode,
optionalHeader.H64->ImageBase);
}
else {
info += usprintf("\nOptional header signature: %04Xh, unknown", optionalHeader.H32->Magic);
msg(UString("parsePeImageSectionBody: PE32 image with invalid optional PE header signature"), index);
}
model->addInfo(index, info);
return U_SUCCESS;
}
USTATUS FfsParser::parseTeImageSectionBody(const UModelIndex & index)
{
// Check sanity
if (!index.isValid())
return U_INVALID_PARAMETER;
// Get section body
UByteArray body = model->body(index);
if ((UINT32)body.size() < sizeof(EFI_IMAGE_TE_HEADER)) {
msg(UString("parsePeImageSectionBody: section body size is smaller than TE header size"), index);
return U_SUCCESS;
}
UString info;
const EFI_IMAGE_TE_HEADER* teHeader = (const EFI_IMAGE_TE_HEADER*)body.constData();
if (teHeader->Signature != EFI_IMAGE_TE_SIGNATURE) {
info += usprintf("\nSignature: %04Xh, invalid", teHeader->Signature);
msg(UString("parseTeImageSectionBody: TE image with invalid TE signature"), index);
}
else {
info += usprintf("\nSignature: %04Xh", teHeader->Signature) +
UString("\nMachine type: ") + machineTypeToUString(teHeader->Machine) +
usprintf("\nNumber of sections: %u\nSubsystem: %02Xh\nStripped size: %Xh (%u)\n"
"Base of code: %Xh\nAddress of entry point: %Xh\nImage base: %" PRIX64 "h\nAdjusted image base: %" PRIX64 "h",
teHeader->NumberOfSections,
teHeader->Subsystem,
teHeader->StrippedSize, teHeader->StrippedSize,
teHeader->BaseOfCode,
teHeader->AddressOfEntryPoint,
teHeader->ImageBase,
teHeader->ImageBase + teHeader->StrippedSize - sizeof(EFI_IMAGE_TE_HEADER));
}
// Update parsing data
TE_IMAGE_SECTION_PARSING_DATA pdata;
pdata.imageBaseType = EFI_IMAGE_TE_BASE_OTHER; // Will be determined later
pdata.imageBase = (UINT32)teHeader->ImageBase;
pdata.adjustedImageBase = (UINT32)(teHeader->ImageBase + teHeader->StrippedSize - sizeof(EFI_IMAGE_TE_HEADER));
model->setParsingData(index, UByteArray((const char*)&pdata, sizeof(pdata)));
// Add TE info
model->addInfo(index, info);
return U_SUCCESS;
}
USTATUS FfsParser::performSecondPass(const UModelIndex & index)
{
// Sanity check
if (!index.isValid() || !lastVtf.isValid())
return U_INVALID_PARAMETER;
// Check for compressed lastVtf
if (model->compressed(lastVtf)) {
msg(UString("performSecondPass: the last VTF appears inside compressed item, the image may be damaged"), lastVtf);
return U_SUCCESS;
}
// Calculate address difference
const UINT32 vtfSize = model->header(lastVtf).size() + model->body(lastVtf).size() + model->tail(lastVtf).size();
const UINT32 diff = 0xFFFFFFFFUL - model->offset(lastVtf) - vtfSize + 1;
// Find and parse FIT
parseFit(index, diff);
// Apply address information to index and all it's child items
addMemoryAddressesRecursive(index, diff);
// Add fixed and compressed
addFixedAndCompressedRecursive(index);
return U_SUCCESS;
}
USTATUS FfsParser::addFixedAndCompressedRecursive(const UModelIndex & index) {
// Sanity check
if (!index.isValid())
return U_INVALID_PARAMETER;
// Add fixed and compressed info
model->addInfo(index, usprintf("\nCompressed: %s", model->compressed(index) ? "Yes" : "No"));
model->addInfo(index, usprintf("\nFixed: %s", model->fixed(index) ? "Yes" : "No"));
// Process child items
for (int i = 0; i < model->rowCount(index); i++) {
addFixedAndCompressedRecursive(index.child(i, 0));
}
return U_SUCCESS;
}
USTATUS FfsParser::parseFit(const UModelIndex & index, const UINT32 diff)
{
// Check sanity
if (!index.isValid())
return EFI_INVALID_PARAMETER;
// Search for FIT
UModelIndex fitIndex;
UINT32 fitOffset;
USTATUS result = findFitRecursive(index, diff, fitIndex, fitOffset);
if (result)
return result;
// FIT not found
if (!fitIndex.isValid())
return U_SUCCESS;
// Explicitly set the item as fixed
// TODO: update info
model->setFixed(fitIndex, true);
// Special case of FIT header
UByteArray fitBody = model->body(fitIndex);
const FIT_ENTRY* fitHeader = (const FIT_ENTRY*)(fitBody.constData() + fitOffset);
// Check FIT checksum, if present
UINT32 fitSize = (fitHeader->Size & 0xFFFFFF) << 4;
if (fitHeader->Type & 0x80) {
// Calculate FIT entry checksum
UByteArray tempFIT = model->body(fitIndex).mid(fitOffset, fitSize);
FIT_ENTRY* tempFitHeader = (FIT_ENTRY*)tempFIT.data();
tempFitHeader->Type &= 0x7F; // Remove ChecksumValid bit before calculating the checksum
tempFitHeader->Checksum = 0;
UINT8 calculated = calculateChecksum8((const UINT8*)tempFitHeader, fitSize);
if (calculated != fitHeader->Checksum) {
msg(usprintf("parseFit: invalid FIT table checksum %02Xh, should be %02Xh", fitHeader->Checksum, calculated), fitIndex);
}
}
// Check fit header type
if ((fitHeader->Type & 0x7F) != FIT_TYPE_HEADER)
msg(UString("Invalid FIT header type"), fitIndex);
// Add FIT header
std::vector<UString> currentStrings;
currentStrings.push_back(UString("_FIT_ "));
currentStrings.push_back(usprintf("%08Xh", fitSize));
currentStrings.push_back(usprintf("%04Xh", fitHeader->Version));
currentStrings.push_back(usprintf("%02Xh", fitHeader->Checksum));
currentStrings.push_back(fitEntryTypeToUString(fitHeader->Type));
currentStrings.push_back(UString("")); // Empty info for FIT header
fitTable.push_back(std::pair<std::vector<UString>, UModelIndex>(currentStrings, fitIndex));
// Process all other entries
bool msgModifiedImageMayNotWork = false;
for (UINT32 i = 1; i < fitHeader->Size; i++) {
currentStrings.clear();
UString info;
UModelIndex itemIndex;
const FIT_ENTRY* currentEntry = fitHeader + i;
UINT32 currentEntrySize = currentEntry->Size;
// Check entry type
switch (currentEntry->Type & 0x7F) {
case FIT_TYPE_HEADER:
msg(UString("parseFit: second FIT header found, the table is damaged"), fitIndex);
break;
case FIT_TYPE_EMPTY:
break;
case FIT_TYPE_MICROCODE: {
//TODO: refactor into function with error reporting
if (currentEntry->Address > diff && currentEntry->Address < 0xFFFFFFFFUL) {
UINT32 offset = (UINT32)currentEntry->Address - diff;
UModelIndex mcIndex = model->findByOffset(offset);
UByteArray mcFile = model->header(mcIndex) + model->body(mcIndex) + model->tail(mcIndex);
UINT32 mcOffset = offset - model->offset(mcIndex);
if (mcOffset + sizeof(INTEL_MICROCODE_HEADER) <= (UINT32)mcFile.size()) {
const INTEL_MICROCODE_HEADER* header = (const INTEL_MICROCODE_HEADER*)(mcFile.constData() + mcOffset);
if (header->Version == INTEL_MICROCODE_HEADER_VERSION) {
bool reservedBytesValid = true;
for (UINT8 i = 0; i < sizeof(header->Reserved); i++)
if (header->Reserved[i] != INTEL_MICROCODE_HEADER_RESERVED_BYTE) {
reservedBytesValid = false;
break;
}
if (reservedBytesValid) {
UINT32 mcSize = header->TotalSize;
if (mcOffset + mcSize <= (UINT32)mcFile.size()) {
info = usprintf("LocalOffset %08Xh, CPUID %08Xh, Revision %08Xh, Date %08Xh",
mcOffset,
header->CpuSignature,
header->Revision,
header->Date);
currentEntrySize = header->TotalSize;
itemIndex = mcIndex;
}
}
}
}
}
} break;
case FIT_TYPE_BIOS_AC_MODULE:
case FIT_TYPE_BIOS_INIT_MODULE:
case FIT_TYPE_TPM_POLICY:
case FIT_TYPE_BIOS_POLICY_DATA:
case FIT_TYPE_TXT_CONF_POLICY:
case FIT_TYPE_AC_KEY_MANIFEST:
case FIT_TYPE_AC_BOOT_POLICY:
default:
if (currentEntry->Address > diff && currentEntry->Address < 0xFFFFFFFFUL) {
UINT32 offset = (UINT32)currentEntry->Address - diff;
itemIndex = model->findByOffset(offset);
}
msgModifiedImageMayNotWork = true;
break;
}
// Add entry to fitTable
currentStrings.push_back(usprintf("%016" PRIX64, currentEntry->Address));
currentStrings.push_back(usprintf("%08Xh", currentEntrySize, currentEntrySize));
currentStrings.push_back(usprintf("%04Xh", currentEntry->Version));
currentStrings.push_back(usprintf("%02Xh", currentEntry->Checksum));
currentStrings.push_back(fitEntryTypeToUString(currentEntry->Type));
currentStrings.push_back(info);
fitTable.push_back(std::pair<std::vector<UString>, UModelIndex>(currentStrings, itemIndex));
}
if (msgModifiedImageMayNotWork)
msg(UString("parseFit: opened image may not work after any modification"), fitIndex);
return U_SUCCESS;
}
USTATUS FfsParser::findFitRecursive(const UModelIndex & index, const UINT32 diff, UModelIndex & found, UINT32 & fitOffset)
{
// Sanity check
if (!index.isValid())
return U_SUCCESS;
// Process child items
for (int i = 0; i < model->rowCount(index); i++) {
findFitRecursive(index.child(i, 0), diff, found, fitOffset);
if (found.isValid())
return U_SUCCESS;
}
// Check for all FIT signatures in item's body
UByteArray lastVtfBody = model->body(lastVtf);
UINT32 storedFitAddress = *(const UINT32*)(lastVtfBody.constData() + lastVtfBody.size() - FIT_POINTER_OFFSET);
for (INT32 offset = model->body(index).indexOf(FIT_SIGNATURE);
offset >= 0;
offset = model->body(index).indexOf(FIT_SIGNATURE, offset + 1)) {
// FIT candidate found, calculate it's physical address
UINT32 fitAddress = model->offset(index) + diff + model->header(index).size() + (UINT32)offset;
// Check FIT address to be stored in the last VTF
if (fitAddress == storedFitAddress) {
found = index;
fitOffset = offset;
msg(usprintf("findFitRecursive: real FIT table found at physical address %08Xh", fitAddress), found);
return U_SUCCESS;
}
else if (model->rowCount(index) == 0) // Show messages only to leaf items
msg(UString("findFitRecursive: FIT table candidate found, but not referenced from the last VTF"), index);
}
return U_SUCCESS;
}
USTATUS FfsParser::addMemoryAddressesRecursive(const UModelIndex & index, const UINT32 diff)
{
// Sanity check
if (!index.isValid())
return U_SUCCESS;
// Set address value for non-compressed data
if (!model->compressed(index)) {
// Check address sanity
UINT64 address = (const UINT64)diff + model->offset(index);
if (address <= 0xFFFFFFFFUL) {
// Update info
UINT32 headerSize = model->header(index).size();
if (headerSize) {
model->addInfo(index, usprintf("\nHeader memory address: %08Xh", address));
model->addInfo(index, usprintf("\nData memory address: %08Xh", address + headerSize));
}
else {
model->addInfo(index, usprintf("\nMemory address: %08Xh", address));
}
// Determine relocation type of uncompressed TE image sections
if (model->type(index) == Types::Section && model->subtype(index) == EFI_SECTION_TE) {
// Obtain required values from parsing data
UINT32 imageBase = 0;
UINT32 adjustedImageBase = 0;
UINT8 imageBaseType = EFI_IMAGE_TE_BASE_OTHER;
if (model->hasEmptyParsingData(index) == false) {
UByteArray data = model->parsingData(index);
const TE_IMAGE_SECTION_PARSING_DATA* pdata = (const TE_IMAGE_SECTION_PARSING_DATA*)data.constData();
imageBase = pdata->imageBase;
adjustedImageBase = pdata->adjustedImageBase;
}
if (imageBase != 0) {
// Check data memory address to be equal to either ImageBase or AdjustedImageBase
UINT32 base = (UINT32)address + headerSize;
if (imageBase == base) {
imageBaseType = EFI_IMAGE_TE_BASE_ORIGINAL;
}
else if (adjustedImageBase == base) {
imageBaseType = EFI_IMAGE_TE_BASE_ADJUSTED;
}
else {
// Check for one-bit difference
UINT32 xored = base ^ imageBase; // XOR result can't be zero
if ((xored & (xored - 1)) == 0) { // Check that XOR result is a power of 2, i.e. has exactly one bit set
imageBaseType = EFI_IMAGE_TE_BASE_ORIGINAL;
}
else { // The same check for adjustedImageBase
xored = base ^ adjustedImageBase;
if ((xored & (xored - 1)) == 0) {
imageBaseType = EFI_IMAGE_TE_BASE_ADJUSTED;
}
}
}
// Show message if imageBaseType is still unknown
if (imageBaseType == EFI_IMAGE_TE_BASE_OTHER)
msg(UString("addMemoryAddressesRecursive: TE image base is neither zero, nor original, nor adjusted, nor top-swapped"), index);
// Update parsing data
TE_IMAGE_SECTION_PARSING_DATA pdata;
pdata.imageBaseType = imageBaseType;
pdata.imageBase = imageBase;
pdata.adjustedImageBase = adjustedImageBase;
model->setParsingData(index, UByteArray((const char*)&pdata, sizeof(pdata)));
}
}
}
}
// Process child items
for (int i = 0; i < model->rowCount(index); i++) {
addMemoryAddressesRecursive(index.child(i, 0), diff);
}
return U_SUCCESS;
}
USTATUS FfsParser::addOffsetsRecursive(const UModelIndex & index)
{
// Sanity check
if (!index.isValid())
return U_INVALID_PARAMETER;
// Add current offset if the element is not compressed
// or it's compressed, but it's parent isn't
if ((!model->compressed(index)) || (index.parent().isValid() && !model->compressed(index.parent()))) {
model->addInfo(index, usprintf("Offset: %Xh\n", model->offset(index)), false);
}
// Process child items
for (int i = 0; i < model->rowCount(index); i++) {
addOffsetsRecursive(index.child(i, 0));
}
return U_SUCCESS;
}
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