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authorNicola Corna <nicola@corna.info>2018-03-31 16:25:03 +0200
committerPatrick Georgi <pgeorgi@google.com>2018-04-06 06:54:14 +0000
commit8882ac55efd84142971657b17d9ab9733bb8348f (patch)
tree07cdb3096e45a207888f064072bf2e8afc7ce37c /util
parent7efdacd748f5292bfe09f2365ace14a614960dd0 (diff)
util/me_cleaner: Update to v1.2
Changelog: * Add support for the HAP/AltMeDisable bit * Add support for selective partition removal * Fix the ME permission removal on gen. 3 * Add public key match * Print the compressed size of the Huffman modules on gen. 2 * Wipe the ME6 Ignition firmware images * Fix the removal of the last partition on ME6 * Various region size fixes * Add manpage * Add setup.py * Print the value of the HAP/AltMeDisable bit The output image should be identical, except for the platforms affected by bugs (ME 6.x, but it's not supported by coreboot and ME 11.x with the -d option, but it's not being used in our build process). Overall, nothing should change when it's used with the CONFIG_USE_ME_CLEANER option. Tested on a Lenovo X220 and Sapphire Pure Platinum H61. Change-Id: I3d5e0d9af0a36cc7476a964cf753914c2f3df9d2 Signed-off-by: Nicola Corna <nicola@corna.info> Reviewed-on: https://review.coreboot.org/25506 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Diffstat (limited to 'util')
-rw-r--r--util/me_cleaner/README.md103
-rw-r--r--util/me_cleaner/man/me_cleaner.1159
-rwxr-xr-xutil/me_cleaner/me_cleaner.py568
-rwxr-xr-xutil/me_cleaner/setup.py22
4 files changed, 630 insertions, 222 deletions
diff --git a/util/me_cleaner/README.md b/util/me_cleaner/README.md
index 72c15986df..d4c20598d6 100644
--- a/util/me_cleaner/README.md
+++ b/util/me_cleaner/README.md
@@ -1,44 +1,85 @@
-# me_cleaner
-
-Intel ME is a coprocessor integrated in all post-2006 Intel boards, for which
-this [Libreboot page](https://libreboot.org/faq.html#intelme) has an excellent
-description. The main component of Intel ME is Intel AMT, and I suggest you to
-read [this Wikipedia page](https://en.wikipedia.org/wiki/Intel_Active_Management_Technology)
-for more information about it. In short, Intel ME is an irremovable environment
-with an obscure signed proprietary firmware, with full network and memory
-access, which poses a serious security threat.
-Even when disabled from the BIOS settings, Intel ME is active: the only way to
-be sure it is disabled is to remove its firmware from the flash chip.
+# me\_cleaner
+
+_me\_cleaner_ is a Python script able to modify an Intel ME firmware image with
+the final purpose of reducing its ability to interact with the system.
+
+## Intel ME
+
+Intel ME is a co-processor integrated in all post-2006 Intel boards, which is
+the base hardware for many Intel features like Intel AMT, Intel Boot Guard,
+Intel PAVP and many others. To provide such features, it requires full access to
+the system, including memory (through DMA) and network access (transparent to
+the user).
+
+Unlike many other firmware components, the Intel ME firmware can't be neither
+disabled nor reimplemented, as it is tightly integrated in the boot process and
+it is signed.
+
+This poses an issue both to the free firmware implementations like [coreboot](
+https://www.coreboot.org/), which are forced to rely on a proprietary, obscure
+and always-on blob, and to the privacy-aware users, who are reasonably worried
+about such firmware, running on the lowest privilege ring on x86.
+
+## What can be done
Before Nehalem (ME version 6, 2008/2009) the ME firmware could be removed
completely from the flash chip by setting a couple of bits inside the flash
-descriptor, without the need to reverse-engineer the ME firmware.
+descriptor, effectively disabling it.
Starting from Nehalem the Intel ME firmware can't be removed anymore: without a
-valid firmware the PC shuts off forcefully after 30 minutes. This project is an
-attempt to remove as much code as possible from such firmware without falling
-into the 30 minutes recovery mode.
+valid firmware the PC shuts off forcefully after 30 minutes, probably as an
+attempt to enforce the Intel Anti-Theft policies.
+
+However, while Intel ME can't be turned off completely, it is still possible to
+modify its firmware up to a point where Intel ME is active only during the boot
+process, effectively disabling it during the normal operation, which is what
+_me\_cleaner_ tries to accomplish.
+
+## Platform support
-me_cleaner currently works on most architectures, see [me_cleaner status](https://github.com/corna/me_cleaner/wiki/me_cleaner-status) (or [its discussion](https://github.com/corna/me_cleaner/issues/3))
-for more info about them. me_cleaner works also on the TXE and SPS firmware.
+_me\_cleaner_ currently works on [most of the Intel platforms](
+https://github.com/corna/me_cleaner/wiki/me_cleaner-status); while this doesn't
+mean it works on all the boards (due to the different firmware implementations),
+it has been proven quite reliable on a great number of them.
-If you want to understand how me_cleaner works, you can read the ["How does it work?" page](https://github.com/corna/me_cleaner/wiki/How-does-it-work%3F).
+## Usage
-If you want to apply me_cleaner on your platform I suggest you to read the
-["How does it work?" page](https://github.com/corna/me_cleaner/wiki/How-does-it-work%3F)
-and then follow the guide ["How to apply me_cleaner"](https://github.com/corna/me_cleaner/wiki/How-to-apply-me_cleaner).
+_me\_cleaner_ should handle all the steps necessary to the modification of an
+Intel ME firmware with the command:
+
+ $ python me_cleaner.py -S -O modified_image.bin original_dump.bin
+
+However, obtaining the original firmware and flashing back the modified one is
+usually not trivial, as the Intel ME firmware region is often non-writable from
+the OS (and it's not a safe option anyways), requiring the use of an external
+SPI programmer.
+
+## Results
For pre-Skylake firmware (ME version < 11) this tool removes almost everything,
-leaving only the two fundamental modules needed for the correct boot, ROMP and
-BUP. The code size is reduced from 1.5 MB (non-AMT firmware) or 5 MB (AMT
+leaving only the two fundamental modules needed for the correct boot, `ROMP` and
+`BUP`. The code size is reduced from 1.5 MB (non-AMT firmware) or 5 MB (AMT
firmware) to ~90 kB of compressed code.
Starting from Skylake (ME version >= 11) the ME subsystem and the firmware
-structure have changed, requiring substantial changes in me_cleaner.
-The fundamental modules required for the correct boot are now four (rbe, kernel,
-syslib and bup) and the minimum code size is ~300 kB of compressed code (from
-the 2 MB of the non-AMT firmware and the 7 MB of the AMT one).
-
-This project is based on the work of the community; in particular I thank Igor
-Skochinsky, for the core information about Intel ME and its firmware structure,
-and Federico Amedeo Izzo, for its help during the study of Intel ME.
+structure have changed, requiring substantial changes in _me\_cleaner_.
+The fundamental modules required for the correct boot are now four (`rbe`,
+`kernel`, `syslib` and `bup`) and the minimum code size is ~300 kB of compressed
+code (from the 2 MB of the non-AMT firmware and the 7 MB of the AMT one).
+
+On some boards the OEM firmware fails to boot without a valid Intel ME firmware;
+in the other cases the system should work with minor inconveniences (like longer
+boot times or warning messages) or without issues at all.
+
+Obviously, the features provided by Intel ME won't be functional anymore after
+the modifications.
+
+## Documentation
+
+The detailed documentation about the working of _me\_cleaner_ can be found on
+the page ["How does it work?" page](
+https://github.com/corna/me_cleaner/wiki/How-does-it-work%3F).
+
+Various guides and tutorials are available on the Internet, however a good
+starting point is the ["How to apply me_cleaner" guide](
+https://github.com/corna/me_cleaner/wiki/How-to-apply-me_cleaner).
diff --git a/util/me_cleaner/man/me_cleaner.1 b/util/me_cleaner/man/me_cleaner.1
new file mode 100644
index 0000000000..2a219bcb8e
--- /dev/null
+++ b/util/me_cleaner/man/me_cleaner.1
@@ -0,0 +1,159 @@
+.TH me_cleaner 1 "MARCH 2018"
+.SH me_cleaner
+.PP
+me_cleaner \- Tool for partial deblobbing of Intel ME/TXE firmware images
+.SH SYNOPSIS
+.PP
+\fB\fCme_cleaner.py\fR [\-h] [\-v] [\-O output_file] [\-S | \-s] [\-r] [\-k]
+[\-w whitelist | \-b blacklist] [\-d] [\-t] [\-c] [\-D output_descriptor]
+[\-M output_me_image] \fIfile\fP
+.SH DESCRIPTION
+.PP
+\fB\fCme_cleaner\fR is a tool able to disable parts of Intel ME/TXE by:
+.RS
+.IP \(bu 2
+removing most of the code from its firmware
+.IP \(bu 2
+setting a special bit to force it to disable itself after the hardware
+initialization
+.RE
+.PP
+Using both the modes seems to be the most reliable way on many platforms.
+.PP
+The resulting modified firmware needs to be flashed (in most of the cases) with
+an external programmer, often a dedicated SPI programmer or a Linux board with
+a SPI master interface.
+.PP
+\fB\fCme_cleaner\fR works at least from Nehalem to Coffee Lake (for Intel ME) and on
+Braswell/Cherry Trail (for Intel TXE), but may work as well on newer or
+different architectures.
+.PP
+While \fB\fCme_cleaner\fR have been tested on a great number of platforms, fiddling
+with the Intel ME/TXE firmware is \fIvery dangerous\fP and can easily lead to a
+dead PC.
+.PP
+\fIYOU HAVE BEEN WARNED.\fP
+.SH POSITIONAL ARGUMENTS
+.TP
+\fB\fCfile\fR
+ME/TXE image or full dump.
+.SH OPTIONAL ARGUMENTS
+.TP
+\fB\fC\-h\fR, \fB\fC\-\-help\fR
+Show the help message and exit.
+.TP
+\fB\fC\-v\fR, \fB\fC\-\-version\fR
+Show program's version number and exit.
+.TP
+\fB\fC\-O\fR, \fB\fC\-\-output\fR
+Save the modified image in a separate file, instead of modifying the
+original file.
+.TP
+\fB\fC\-S\fR, \fB\fC\-\-soft\-disable\fR
+In addition to the usual operations on the ME/TXE firmware, set the
+MeAltDisable bit or the HAP bit to ask Intel ME/TXE to disable itself after
+the hardware initialization (requires a full dump).
+.TP
+\fB\fC\-s\fR, \fB\fC\-\-soft\-disable\-only\fR
+Instead of the usual operations on the ME/TXE firmware, just set the
+MeAltDisable bit or the HAP bit to ask Intel ME/TXE to disable itself after
+the hardware initialization (requires a full dump).
+.TP
+\fB\fC\-r\fR, \fB\fC\-\-relocate\fR
+Relocate the FTPR partition to the top of the ME region to save even more
+space.
+.TP
+\fB\fC\-t\fR, \fB\fC\-\-truncate\fR
+Truncate the empty part of the firmware (requires a separated ME/TXE image or
+\fB\fC\-\-extract\-me\fR).
+.TP
+\fB\fC\-k\fR, \fB\fC\-\-keep\-modules\fR
+Don't remove the FTPR modules, even when possible.
+.TP
+\fB\fC\-w\fR, \fB\fC\-\-whitelist\fR
+Comma separated list of additional partitions to keep in the final image.
+This can be used to specify the MFS partition for example, which stores PCIe
+and clock settings.
+.TP
+\fB\fC\-b\fR, \fB\fC\-\-blacklist\fR
+Comma separated list of partitions to remove from the image. This option
+overrides the default removal list.
+.TP
+\fB\fC\-d\fR, \fB\fC\-\-descriptor\fR
+Remove the ME/TXE Read/Write permissions to the other regions on the flash
+from the Intel Flash Descriptor (requires a full dump).
+.TP
+\fB\fC\-D\fR, \fB\fC\-\-extract\-descriptor\fR
+Extract the flash descriptor from a full dump; when used with \fB\fC\-\-truncate\fR
+save a descriptor with adjusted regions start and end.
+.TP
+\fB\fC\-M\fR, \fB\fC\-\-extract\-me\fR
+Extract the ME firmware from a full dump; when used with \fB\fC\-\-truncate\fR save a
+truncated ME/TXE image.
+.TP
+\fB\fC\-c\fR, \fB\fC\-\-check\fR
+Verify the integrity of the fundamental parts of the firmware and exit.
+.SH SUPPORTED PLATFORMS
+.PP
+Currently \fB\fCme_cleaner\fR has been tested on the following platforms:
+.TS
+allbox;
+cb cb cb cb
+c c c c
+c c c c
+c c c c
+c c c c
+c c c c
+c c c c
+c c c c
+c c c c
+.
+PCH CPU ME SKU
+Ibex Peak * Nehalem/Westmere 6.0 Ignition
+Ibex Peak * Nehalem/Westmere 6.x 1.5/5 MB
+Cougar Point Sandy Bridge 7.x 1.5/5 MB
+Panther Point Ivy Bridge 8.x 1.5/5 MB
+Lynx/Wildcat Point Haswell/Broadwell 9.x 1.5/5 MB
+Wildcat Point LP Broadwell Mobile 10.0 1.5/5 MB
+Sunrise Point Skylake/Kabylake 11.x CON/COR
+Union Point Kabylake 11.x CON/COR
+.TE
+.TS
+allbox;
+cb cb cb
+c c c
+.
+SoC TXE SKU
+Braswell/Cherry Trail 2.x 1.375 MB
+.TE
+.PP
+* Not working on coreboot
+.PP
+All the reports are available on the project's GitHub page \[la]https://github.com/corna/me_cleaner/issues/3\[ra]\&.
+.SH EXAMPLES
+.PP
+Check whether the provided image has a valid structure and signature:
+.IP
+\fB\fCme_cleaner.py \-c dumped_firmware.bin\fR
+.PP
+Remove most of the Intel ME firmware modules but don't set the HAP/AltMeDisable
+bit:
+.IP
+\fB\fCme_cleaner.py \-S \-O modified_me_firmware.bin dumped_firmware.bin\fR
+.PP
+Remove most of the Intel ME firmware modules and set the HAP/AltMeDisable bit,
+disable the Read/Write access of Intel ME to the other flash region, then
+relocate the code to the top of the image and truncate it, extracting a modified
+descriptor and ME image:
+.IP
+\fB\fCme_cleaner.py \-S \-r \-t \-d \-D ifd_shrinked.bin \-M me_shrinked.bin \-O modified_firmware.bin full_dumped_firmware.bin\fR
+.SH BUGS
+.PP
+Bugs should be reported on the project's GitHub page \[la]https://github.com/corna/me_cleaner\[ra]\&.
+.SH AUTHOR
+.PP
+Nicola Corna \[la]nicola@corna.info\[ra]
+.SH SEE ALSO
+.PP
+.BR flashrom (8),
+me_cleaner's Wiki \[la]https://github.com/corna/me_cleaner/wiki\[ra]
diff --git a/util/me_cleaner/me_cleaner.py b/util/me_cleaner/me_cleaner.py
index 11f077d207..03fbbcb56b 100755
--- a/util/me_cleaner/me_cleaner.py
+++ b/util/me_cleaner/me_cleaner.py
@@ -1,7 +1,7 @@
#!/usr/bin/python
-# me_cleaner - Tool for partial deblobbing of Intel ME/TXE firmware images
-# Copyright (C) 2016, 2017 Nicola Corna <nicola@corna.info>
+# me_cleaner - Tool for partial deblobbing of Intel ME/TXE firmware images
+# Copyright (C) 2016-2018 Nicola Corna <nicola@corna.info>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
@@ -14,12 +14,14 @@
# GNU General Public License for more details.
#
-import sys
-import itertools
+from __future__ import division, print_function
+
+import argparse
import binascii
import hashlib
-import argparse
+import itertools
import shutil
+import sys
from struct import pack, unpack
@@ -27,6 +29,23 @@ min_ftpr_offset = 0x400
spared_blocks = 4
unremovable_modules = ("ROMP", "BUP")
unremovable_modules_me11 = ("rbe", "kernel", "syslib", "bup")
+unremovable_partitions = ("FTPR",)
+
+pubkeys_md5 = {
+ "763e59ebe235e45a197a5b1a378dfa04": ("ME", ("6.x.x.x",)),
+ "3a98c847d609c253e145bd36512629cb": ("ME", ("6.0.50.x",)),
+ "0903fc25b0f6bed8c4ed724aca02124c": ("ME", ("7.x.x.x", "8.x.x.x")),
+ "2011ae6df87c40fba09e3f20459b1ce0": ("ME", ("9.0.x.x", "9.1.x.x")),
+ "e8427c5691cf8b56bc5cdd82746957ed": ("ME", ("9.5.x.x", "10.x.x.x")),
+ "986a78e481f185f7d54e4af06eb413f6": ("ME", ("11.x.x.x",)),
+ "bda0b6bb8ca0bf0cac55ac4c4d55e0f2": ("TXE", ("1.x.x.x",)),
+ "b726a2ab9cd59d4e62fe2bead7cf6997": ("TXE", ("1.x.x.x",)),
+ "0633d7f951a3e7968ae7460861be9cfb": ("TXE", ("2.x.x.x",)),
+ "1d0a36e9f5881540d8e4b382c6612ed8": ("TXE", ("3.x.x.x",)),
+ "be900fef868f770d266b1fc67e887e69": ("SPS", ("2.x.x.x",)),
+ "4622e3f2cb212a89c90a4de3336d88d2": ("SPS", ("3.x.x.x",)),
+ "31ef3d950eac99d18e187375c0764ca4": ("SPS", ("4.x.x.x",))
+}
class OutOfRegionException(Exception):
@@ -40,59 +59,71 @@ class RegionFile:
self.region_end = region_end
def read(self, n):
- return self.f.read(n)
+ if f.tell() + n <= self.region_end:
+ return self.f.read(n)
+ else:
+ raise OutOfRegionException()
def readinto(self, b):
- return self.f.readinto(b)
+ if f.tell() + len(b) <= self.region_end:
+ return self.f.readinto(b)
+ else:
+ raise OutOfRegionException()
def seek(self, offset):
- return self.f.seek(offset)
+ if self.region_start + offset <= self.region_end:
+ return self.f.seek(self.region_start + offset)
+ else:
+ raise OutOfRegionException()
def write_to(self, offset, data):
- if offset >= self.region_start and \
- offset + len(data) <= self.region_end:
- self.f.seek(offset)
+ if self.region_start + offset + len(data) <= self.region_end:
+ self.f.seek(self.region_start + offset)
return self.f.write(data)
else:
raise OutOfRegionException()
def fill_range(self, start, end, fill):
- if start >= self.region_start and end <= self.region_end:
+ if self.region_start + end <= self.region_end:
if start < end:
block = fill * 4096
- self.f.seek(start)
+ self.f.seek(self.region_start + start)
self.f.writelines(itertools.repeat(block,
(end - start) // 4096))
self.f.write(block[:(end - start) % 4096])
else:
raise OutOfRegionException()
+ def fill_all(self, fill):
+ self.fill_range(0, self.region_end - self.region_start, fill)
+
def move_range(self, offset_from, size, offset_to, fill):
- if offset_from >= self.region_start and \
- offset_from + size <= self.region_end and \
- offset_to >= self.region_start and \
- offset_to + size <= self.region_end:
+ if self.region_start + offset_from + size <= self.region_end and \
+ self.region_start + offset_to + size <= self.region_end:
for i in range(0, size, 4096):
- self.f.seek(offset_from + i, 0)
- block = self.f.read(4096 if size - i >= 4096 else size - i)
- self.f.seek(offset_from + i, 0)
+ self.f.seek(self.region_start + offset_from + i, 0)
+ block = self.f.read(min(size - i, 4096))
+ self.f.seek(self.region_start + offset_from + i, 0)
self.f.write(fill * len(block))
- self.f.seek(offset_to + i, 0)
+ self.f.seek(self.region_start + offset_to + i, 0)
self.f.write(block)
else:
raise OutOfRegionException()
def save(self, filename, size):
- self.f.seek(self.region_start)
- copyf = open(filename, "w+b")
- for i in range(0, size, 4096):
- copyf.write(self.f.read(4096 if size - i >= 4096 else size - i))
- return copyf
+ if self.region_start + size <= self.region_end:
+ self.f.seek(self.region_start)
+ copyf = open(filename, "w+b")
+ for i in range(0, size, 4096):
+ copyf.write(self.f.read(min(size - i, 4096)))
+ return copyf
+ else:
+ raise OutOfRegionException()
-def get_chunks_offsets(llut, me_start):
+def get_chunks_offsets(llut):
chunk_count = unpack("<I", llut[0x04:0x08])[0]
- huffman_stream_end = sum(unpack("<II", llut[0x10:0x18])) + me_start
+ huffman_stream_end = sum(unpack("<II", llut[0x10:0x18]))
nonzero_offsets = [huffman_stream_end]
offsets = []
@@ -101,7 +132,7 @@ def get_chunks_offsets(llut, me_start):
offset = 0
if chunk[3] != 0x80:
- offset = unpack("<I", chunk[0:3] + b"\x00")[0] + me_start
+ offset = unpack("<I", chunk[0:3] + b"\x00")[0]
offsets.append([offset, 0])
if offset != 0:
@@ -131,11 +162,11 @@ def remove_modules(f, mod_headers, ftpr_offset, me_end):
flags = unpack("<I", mod_header[0x50:0x54])[0]
comp_type = (flags >> 4) & 7
- sys.stdout.write(" {:<16} ({:<7}, ".format(name, comp_str[comp_type]))
+ print(" {:<16} ({:<7}, ".format(name, comp_str[comp_type]), end="")
if comp_type == 0x00 or comp_type == 0x02:
- sys.stdout.write("0x{:06x} - 0x{:06x}): "
- .format(offset, offset + size))
+ print("0x{:06x} - 0x{:06x} ): "
+ .format(offset, offset + size), end="")
if name in unremovable_modules:
end_addr = max(end_addr, offset + size)
@@ -146,7 +177,6 @@ def remove_modules(f, mod_headers, ftpr_offset, me_end):
print("removed")
elif comp_type == 0x01:
- sys.stdout.write("fragmented data ): ")
if not chunks_offsets:
f.seek(offset)
llut = f.read(4)
@@ -158,16 +188,25 @@ def remove_modules(f, mod_headers, ftpr_offset, me_end):
chunk_size = unpack("<I", llut[0x30:0x34])[0]
llut += f.read(chunk_count * 4)
- chunks_offsets = get_chunks_offsets(llut, me_start)
+ chunks_offsets = get_chunks_offsets(llut)
else:
sys.exit("Huffman modules found, but LLUT is not present")
+ module_base = unpack("<I", mod_header[0x34:0x38])[0]
+ module_size = unpack("<I", mod_header[0x3c:0x40])[0]
+ first_chunk_num = (module_base - base) // chunk_size
+ last_chunk_num = first_chunk_num + module_size // chunk_size
+ huff_size = 0
+
+ for chunk in chunks_offsets[first_chunk_num:last_chunk_num + 1]:
+ huff_size += chunk[1] - chunk[0]
+
+ print("fragmented data, {:<9}): "
+ .format("~" + str(int(round(huff_size / 1024))) + " KiB"),
+ end="")
+
if name in unremovable_modules:
print("NOT removed, essential")
- module_base = unpack("<I", mod_header[0x34:0x38])[0]
- module_size = unpack("<I", mod_header[0x3c:0x40])[0]
- first_chunk_num = (module_base - base) // chunk_size
- last_chunk_num = first_chunk_num + module_size // chunk_size
unremovable_huff_chunks += \
[x for x in chunks_offsets[first_chunk_num:
@@ -176,8 +215,8 @@ def remove_modules(f, mod_headers, ftpr_offset, me_end):
print("removed")
else:
- sys.stdout.write("0x{:06x} - 0x{:06x}): unknown compression, "
- "skipping".format(offset, offset + size))
+ print("0x{:06x} - 0x{:06x}): unknown compression, skipping"
+ .format(offset, offset + size), end="")
if chunks_offsets:
removable_huff_chunks = []
@@ -228,14 +267,13 @@ def print_check_partition_signature(f, offset):
"ME/TXE image valid?")
-def relocate_partition(f, me_start, me_end, partition_header_offset,
+def relocate_partition(f, me_end, partition_header_offset,
new_offset, mod_headers):
f.seek(partition_header_offset)
name = f.read(4).rstrip(b"\x00").decode("ascii")
f.seek(partition_header_offset + 0x8)
old_offset, partition_size = unpack("<II", f.read(0x8))
- old_offset += me_start
llut_start = 0
for mod_header in mod_headers:
@@ -251,8 +289,7 @@ def relocate_partition(f, me_start, me_end, partition_header_offset,
f.seek(llut_start + 0x9)
lut_start_corr = unpack("<H", f.read(2))[0]
new_offset = max(new_offset,
- lut_start_corr + me_start - llut_start - 0x40 +
- old_offset)
+ lut_start_corr - llut_start - 0x40 + old_offset)
new_offset = ((new_offset + 0x1f) // 0x20) * 0x20
offset_diff = new_offset - old_offset
@@ -262,15 +299,14 @@ def relocate_partition(f, me_start, me_end, partition_header_offset,
print(" Adjusting FPT entry...")
f.write_to(partition_header_offset + 0x8,
- pack("<I", new_offset - me_start))
+ pack("<I", new_offset))
if mod_headers:
if llut_start != 0:
f.seek(llut_start)
if f.read(4) == b"LLUT":
print(" Adjusting LUT start offset...")
- lut_offset = llut_start + offset_diff + 0x40 - \
- lut_start_corr - me_start
+ lut_offset = llut_start + offset_diff + 0x40 - lut_start_corr
f.write_to(llut_start + 0x0c, pack("<I", lut_offset))
print(" Adjusting Huffman start offset...")
@@ -303,7 +339,7 @@ def relocate_partition(f, me_start, me_end, partition_header_offset,
return new_offset
-def check_and_remove_modules(f, me_start, me_end, offset, min_offset,
+def check_and_remove_modules(f, me_end, offset, min_offset,
relocate, keep_modules):
f.seek(offset + 0x20)
@@ -311,29 +347,27 @@ def check_and_remove_modules(f, me_start, me_end, offset, min_offset,
f.seek(offset + 0x290)
data = f.read(0x84)
- module_header_size = 0
+ mod_header_size = 0
if data[0x0:0x4] == b"$MME":
if data[0x60:0x64] == b"$MME" or num_modules == 1:
- module_header_size = 0x60
+ mod_header_size = 0x60
elif data[0x80:0x84] == b"$MME":
- module_header_size = 0x80
+ mod_header_size = 0x80
- if module_header_size != 0:
+ if mod_header_size != 0:
f.seek(offset + 0x290)
- mod_headers = [f.read(module_header_size)
+ data = f.read(mod_header_size * num_modules)
+ mod_headers = [data[i * mod_header_size:(i + 1) * mod_header_size]
for i in range(0, num_modules)]
if all(hdr.startswith(b"$MME") for hdr in mod_headers):
if args.keep_modules:
- end_addr = offset + ftpr_lenght
+ end_addr = offset + ftpr_length
else:
- end_addr = remove_modules(f, mod_headers,
- offset, me_end)
+ end_addr = remove_modules(f, mod_headers, offset, me_end)
if args.relocate:
- new_offset = relocate_partition(f, me_start, me_end,
- me_start + 0x30,
- min_offset + me_start,
+ new_offset = relocate_partition(f, me_end, 0x30, min_offset,
mod_headers)
end_addr += new_offset - offset
offset = new_offset
@@ -350,14 +384,14 @@ def check_and_remove_modules(f, me_start, me_end, offset, min_offset,
return -1, offset
-def check_and_remove_modules_me11(f, me_start, me_end, partition_offset,
- partition_lenght, min_offset, relocate,
+def check_and_remove_modules_me11(f, me_end, partition_offset,
+ partition_length, min_offset, relocate,
keep_modules):
comp_str = ("LZMA/uncomp.", "Huffman")
if keep_modules:
- end_data = partition_offset + partition_lenght
+ end_data = partition_offset + partition_length
else:
end_data = 0
@@ -365,7 +399,7 @@ def check_and_remove_modules_me11(f, me_start, me_end, partition_offset,
module_count = unpack("<I", f.read(4))[0]
modules = []
- modules.append(("end", partition_lenght, 0))
+ modules.append(("end", partition_length, 0))
f.seek(partition_offset + 0x10)
for i in range(0, module_count):
@@ -390,8 +424,8 @@ def check_and_remove_modules_me11(f, me_start, me_end, partition_offset,
else:
compression = comp_str[modules[i][2]]
- sys.stdout.write(" {:<12} ({:<12}, 0x{:06x} - 0x{:06x}): "
- .format(name, compression, offset, end))
+ print(" {:<12} ({:<12}, 0x{:06x} - 0x{:06x}): "
+ .format(name, compression, offset, end), end="")
if name.endswith(".man"):
print("NOT removed, partition manif.")
@@ -408,8 +442,7 @@ def check_and_remove_modules_me11(f, me_start, me_end, partition_offset,
end_data = max(end_data, end)
if relocate:
- new_offset = relocate_partition(f, me_start, me_end, me_start + 0x30,
- min_offset + me_start, [])
+ new_offset = relocate_partition(f, me_end, 0x30, min_offset, [])
end_data += new_offset - partition_offset
partition_offset = new_offset
@@ -436,40 +469,72 @@ if __name__ == "__main__":
parser = argparse.ArgumentParser(description="Tool to remove as much code "
"as possible from Intel ME/TXE firmware "
"images")
+ softdis = parser.add_mutually_exclusive_group()
+ bw_list = parser.add_mutually_exclusive_group()
+
+ parser.add_argument("-v", "--version", action="version",
+ version="%(prog)s 1.2")
+
parser.add_argument("file", help="ME/TXE image or full dump")
- parser.add_argument("-O", "--output", help="save the modified image in a "
- "separate file, instead of modifying the original "
- "file")
+ parser.add_argument("-O", "--output", metavar='output_file', help="save "
+ "the modified image in a separate file, instead of "
+ "modifying the original file")
+ softdis.add_argument("-S", "--soft-disable", help="in addition to the "
+ "usual operations on the ME/TXE firmware, set the "
+ "MeAltDisable bit or the HAP bit to ask Intel ME/TXE "
+ "to disable itself after the hardware initialization "
+ "(requires a full dump)", action="store_true")
+ softdis.add_argument("-s", "--soft-disable-only", help="instead of the "
+ "usual operations on the ME/TXE firmware, just set "
+ "the MeAltDisable bit or the HAP bit to ask Intel "
+ "ME/TXE to disable itself after the hardware "
+ "initialization (requires a full dump)",
+ action="store_true")
parser.add_argument("-r", "--relocate", help="relocate the FTPR partition "
"to the top of the ME region to save even more space",
action="store_true")
+ parser.add_argument("-t", "--truncate", help="truncate the empty part of "
+ "the firmware (requires a separated ME/TXE image or "
+ "--extract-me)", action="store_true")
parser.add_argument("-k", "--keep-modules", help="don't remove the FTPR "
"modules, even when possible", action="store_true")
+ bw_list.add_argument("-w", "--whitelist", metavar="whitelist",
+ help="Comma separated list of additional partitions "
+ "to keep in the final image. This can be used to "
+ "specify the MFS partition for example, which stores "
+ "PCIe and clock settings.")
+ bw_list.add_argument("-b", "--blacklist", metavar="blacklist",
+ help="Comma separated list of partitions to remove "
+ "from the image. This option overrides the default "
+ "removal list.")
parser.add_argument("-d", "--descriptor", help="remove the ME/TXE "
"Read/Write permissions to the other regions on the "
"flash from the Intel Flash Descriptor (requires a "
"full dump)", action="store_true")
- parser.add_argument("-t", "--truncate", help="truncate the empty part of "
- "the firmware (requires a separated ME/TXE image or "
- "--extract-me)", action="store_true")
+ parser.add_argument("-D", "--extract-descriptor",
+ metavar='output_descriptor', help="extract the flash "
+ "descriptor from a full dump; when used with "
+ "--truncate save a descriptor with adjusted regions "
+ "start and end")
+ parser.add_argument("-M", "--extract-me", metavar='output_me_image',
+ help="extract the ME firmware from a full dump; when "
+ "used with --truncate save a truncated ME/TXE image")
parser.add_argument("-c", "--check", help="verify the integrity of the "
"fundamental parts of the firmware and exit",
action="store_true")
- parser.add_argument("-D", "--extract-descriptor", help="extract the "
- "flash descriptor from a full dump; when used with "
- "--truncate save a descriptor with adjusted regions "
- "start and end")
- parser.add_argument("-M", "--extract-me", help="extract the ME firmware "
- "from a full dump; when used with --truncate save a "
- "truncated ME/TXE image")
args = parser.parse_args()
- if args.check:
- if args.relocate:
- sys.exit("-c and -r can't be used together")
- elif args.truncate:
- sys.exit("-c and -t can't be used together")
+ if args.check and (args.soft_disable_only or args.soft_disable or
+ args.relocate or args.descriptor or args.truncate or args.output):
+ sys.exit("-c can't be used with -S, -s, -r, -d, -t or -O")
+
+ if args.soft_disable_only and (args.relocate or args.truncate):
+ sys.exit("-s can't be used with -r or -t")
+
+ if (args.whitelist or args.blacklist) and args.relocate:
+ sys.exit("Relocation is not yet supported with custom whitelist or "
+ "blacklist")
f = open(args.file, "rb" if args.check or args.output else "r+b")
f.seek(0x10)
@@ -478,18 +543,14 @@ if __name__ == "__main__":
if magic == b"$FPT":
print("ME/TXE image detected")
- if args.descriptor:
- sys.exit("-d requires a full dump")
-
- if args.extract_descriptor:
- sys.exit("-D requires a full dump")
-
- if args.extract_me:
- sys.exit("-M requires a full dump")
+ if args.descriptor or args.extract_descriptor or args.extract_me or \
+ args.soft_disable or args.soft_disable_only:
+ sys.exit("-d, -D, -M, -S and -s require a full dump")
- me_start = 0
f.seek(0, 2)
+ me_start = 0
me_end = f.tell()
+ mef = RegionFile(f, me_start, me_end)
elif magic == b"\x5a\xa5\xf0\x0f":
print("Full image detected")
@@ -501,6 +562,7 @@ if __name__ == "__main__":
flmap0, flmap1 = unpack("<II", f.read(8))
frba = flmap0 >> 12 & 0xff0
fmba = (flmap1 & 0xff) << 4
+ fpsba = flmap1 >> 12 & 0xff0
f.seek(frba)
flreg = unpack("<III", f.read(12))
@@ -512,8 +574,10 @@ if __name__ == "__main__":
if me_start >= me_end:
sys.exit("The ME/TXE region in this image has been disabled")
- f.seek(me_start + 0x10)
- if f.read(4) != b"$FPT":
+ mef = RegionFile(f, me_start, me_end)
+
+ mef.seek(0x10)
+ if mef.read(4) != b"$FPT":
sys.exit("The ME/TXE region is corrupted or missing")
print("The ME/TXE region goes from {:#x} to {:#x}"
@@ -521,17 +585,16 @@ if __name__ == "__main__":
else:
sys.exit("Unknown image")
- print("Found FPT header at {:#x}".format(me_start + 0x10))
+ end_addr = me_end
- f.seek(me_start + 0x14)
- entries = unpack("<I", f.read(4))[0]
- print("Found {} partition(s)".format(entries))
+ print("Found FPT header at {:#x}".format(mef.region_start + 0x10))
- f.seek(me_start + 0x14)
- header_len = unpack("B", f.read(1))[0]
+ mef.seek(0x14)
+ entries = unpack("<I", mef.read(4))[0]
+ print("Found {} partition(s)".format(entries))
- f.seek(me_start + 0x30)
- partitions = f.read(entries * 0x20)
+ mef.seek(0x30)
+ partitions = mef.read(entries * 0x20)
ftpr_header = b""
@@ -543,21 +606,20 @@ if __name__ == "__main__":
if ftpr_header == b"":
sys.exit("FTPR header not found, this image doesn't seem to be valid")
- ftpr_offset, ftpr_lenght = unpack("<II", ftpr_header[0x08:0x10])
- ftpr_offset += me_start
+ ftpr_offset, ftpr_length = unpack("<II", ftpr_header[0x08:0x10])
print("Found FTPR header: FTPR partition spans from {:#x} to {:#x}"
- .format(ftpr_offset, ftpr_offset + ftpr_lenght))
+ .format(ftpr_offset, ftpr_offset + ftpr_length))
- f.seek(ftpr_offset)
- if f.read(4) == b"$CPD":
+ mef.seek(ftpr_offset)
+ if mef.read(4) == b"$CPD":
me11 = True
- num_entries = unpack("<I", f.read(4))[0]
+ num_entries = unpack("<I", mef.read(4))[0]
- f.seek(ftpr_offset + 0x10)
+ mef.seek(ftpr_offset + 0x10)
ftpr_mn2_offset = -1
for i in range(0, num_entries):
- data = f.read(0x18)
+ data = mef.read(0x18)
name = data[0x0:0xc].rstrip(b"\x00").decode("ascii")
offset = unpack("<I", data[0xc:0xf] + b"\x00")[0]
@@ -566,94 +628,214 @@ if __name__ == "__main__":
break
if ftpr_mn2_offset >= 0:
- check_mn2_tag(f, ftpr_offset + ftpr_mn2_offset)
+ check_mn2_tag(mef, ftpr_offset + ftpr_mn2_offset)
print("Found FTPR manifest at {:#x}"
.format(ftpr_offset + ftpr_mn2_offset))
else:
sys.exit("Can't find the manifest of the FTPR partition")
else:
- check_mn2_tag(f, ftpr_offset)
+ check_mn2_tag(mef, ftpr_offset)
me11 = False
ftpr_mn2_offset = 0
- f.seek(ftpr_offset + ftpr_mn2_offset + 0x24)
- version = unpack("<HHHH", f.read(0x08))
+ mef.seek(ftpr_offset + ftpr_mn2_offset + 0x24)
+ version = unpack("<HHHH", mef.read(0x08))
print("ME/TXE firmware version {}"
.format('.'.join(str(i) for i in version)))
- if not args.check:
- if args.output:
- f.close()
- shutil.copy(args.file, args.output)
- f = open(args.output, "r+b")
-
- mef = RegionFile(f, me_start, me_end)
+ mef.seek(ftpr_offset + ftpr_mn2_offset + 0x80)
+ pubkey_md5 = hashlib.md5(mef.read(0x104)).hexdigest()
- if args.descriptor or args.extract_descriptor:
- fdf = RegionFile(f, fd_start, fd_end)
+ if pubkey_md5 in pubkeys_md5:
+ variant, pubkey_versions = pubkeys_md5[pubkey_md5]
+ print("Public key match: Intel {}, firmware versions {}"
+ .format(variant, ", ".join(pubkey_versions)))
+ else:
+ if version[0] >= 6:
+ variant = "ME"
+ else:
+ variant = "TXE"
+ print("WARNING Unknown public key {}\n"
+ " Assuming Intel {}\n"
+ " Please report this warning to the project's maintainer!"
+ .format(pubkey_md5, variant))
- print("Removing extra partitions...")
- mef.fill_range(me_start + 0x30, ftpr_offset, b"\xff")
- mef.fill_range(ftpr_offset + ftpr_lenght, me_end, b"\xff")
+ if not args.check and args.output:
+ f.close()
+ shutil.copy(args.file, args.output)
+ f = open(args.output, "r+b")
- print("Removing extra partition entries in FPT...")
- mef.write_to(me_start + 0x30, ftpr_header)
- mef.write_to(me_start + 0x14, pack("<I", 1))
+ mef = RegionFile(f, me_start, me_end)
- print("Removing EFFS presence flag...")
- mef.seek(me_start + 0x24)
- flags = unpack("<I", mef.read(4))[0]
- flags &= ~(0x00000001)
- mef.write_to(me_start + 0x24, pack("<I", flags))
+ if me_start > 0:
+ fdf = RegionFile(f, fd_start, fd_end)
if me11:
- mef.seek(me_start + 0x10)
- header = bytearray(mef.read(0x20))
- header[0x0b] = 0x00
- else:
- mef.seek(me_start)
- header = bytearray(mef.read(0x30))
- header[0x1b] = 0x00
- checksum = (0x100 - sum(header) & 0xff) & 0xff
-
- print("Correcting checksum (0x{:02x})...".format(checksum))
- # The checksum is just the two's complement of the sum of the first
- # 0x30 bytes in ME < 11 or bytes 0x10:0x30 in ME >= 11 (except for
- # 0x1b, the checksum itself). In other words, the sum of those bytes
- # must be always 0x00.
- mef.write_to(me_start + 0x1b, pack("B", checksum))
-
- print("Reading FTPR modules list...")
- if me11:
- end_addr, ftpr_offset = \
- check_and_remove_modules_me11(mef, me_start, me_end,
- ftpr_offset, ftpr_lenght,
- min_ftpr_offset, args.relocate,
- args.keep_modules)
+ fdf.seek(fpsba)
+ pchstrp0 = unpack("<I", fdf.read(4))[0]
+ print("The HAP bit is " +
+ ("SET" if pchstrp0 & 1 << 16 else "NOT SET"))
else:
- end_addr, ftpr_offset = \
- check_and_remove_modules(mef, me_start, me_end, ftpr_offset,
- min_ftpr_offset, args.relocate,
- args.keep_modules)
-
- if end_addr > 0:
- end_addr = (end_addr // 0x1000 + 1) * 0x1000
- end_addr += spared_blocks * 0x1000
+ fdf.seek(fpsba + 0x28)
+ pchstrp10 = unpack("<I", fdf.read(4))[0]
+ print("The AltMeDisable bit is " +
+ ("SET" if pchstrp10 & 1 << 7 else "NOT SET"))
+
+ # ME 6 Ignition: wipe everything
+ me6_ignition = False
+ if not args.check and not args.soft_disable_only and \
+ variant == "ME" and version[0] == 6:
+ mef.seek(ftpr_offset + 0x20)
+ num_modules = unpack("<I", mef.read(4))[0]
+ mef.seek(ftpr_offset + 0x290 + (num_modules + 1) * 0x60)
+ data = mef.read(0xc)
+
+ if data[0x0:0x4] == b"$SKU" and data[0x8:0xc] == b"\x00\x00\x00\x00":
+ print("ME 6 Ignition firmware detected, removing everything...")
+ mef.fill_all(b"\xff")
+ me6_ignition = True
- print("The ME minimum size should be {0} bytes "
- "({0:#x} bytes)".format(end_addr - me_start))
-
- if me_start > 0:
- print("The ME region can be reduced up to:\n"
- " {:08x}:{:08x} me".format(me_start, end_addr - 1))
- elif args.truncate:
- print("Truncating file at {:#x}...".format(end_addr))
- f.truncate(end_addr)
+ if not args.check:
+ if not args.soft_disable_only and not me6_ignition:
+ print("Reading partitions list...")
+ unremovable_part_fpt = b""
+ extra_part_end = 0
+ whitelist = []
+ blacklist = []
+
+ whitelist += unremovable_partitions
+
+ if args.blacklist:
+ blacklist = args.blacklist.split(",")
+ elif args.whitelist:
+ whitelist += args.whitelist.split(",")
+
+ for i in range(entries):
+ partition = partitions[i * 0x20:(i + 1) * 0x20]
+ flags = unpack("<I", partition[0x1c:0x20])[0]
+
+ try:
+ part_name = \
+ partition[0x0:0x4].rstrip(b"\x00").decode("ascii")
+ except UnicodeDecodeError:
+ part_name = "????"
+
+ part_start, part_length = unpack("<II", partition[0x08:0x10])
+
+ # ME 6: the last partition has 0xffffffff as size
+ if variant == "ME" and version[0] == 6 and \
+ i == entries - 1 and part_length == 0xffffffff:
+ part_length = me_end - me_start - part_start
+
+ part_end = part_start + part_length
+
+ if flags & 0x7f == 2:
+ print(" {:<4} ({:^24}, 0x{:08x} total bytes): nothing to "
+ "remove"
+ .format(part_name, "NVRAM partition, no data",
+ part_length))
+ elif part_start == 0 or part_length == 0 or part_end > me_end:
+ print(" {:<4} ({:^24}, 0x{:08x} total bytes): nothing to "
+ "remove"
+ .format(part_name, "no data here", part_length))
+ else:
+ print(" {:<4} (0x{:08x} - 0x{:09x}, 0x{:08x} total bytes): "
+ .format(part_name, part_start, part_end, part_length),
+ end="")
+ if part_name in whitelist or (blacklist and
+ part_name not in blacklist):
+ unremovable_part_fpt += partition
+ if part_name != "FTPR":
+ extra_part_end = max(extra_part_end, part_end)
+ print("NOT removed")
+ else:
+ mef.fill_range(part_start, part_end, b"\xff")
+ print("removed")
+
+ print("Removing partition entries in FPT...")
+ mef.write_to(0x30, unremovable_part_fpt)
+ mef.write_to(0x14,
+ pack("<I", len(unremovable_part_fpt) // 0x20))
+
+ mef.fill_range(0x30 + len(unremovable_part_fpt),
+ 0x30 + len(partitions), b"\xff")
+
+ if (not blacklist and "EFFS" not in whitelist) or \
+ "EFFS" in blacklist:
+ print("Removing EFFS presence flag...")
+ mef.seek(0x24)
+ flags = unpack("<I", mef.read(4))[0]
+ flags &= ~(0x00000001)
+ mef.write_to(0x24, pack("<I", flags))
+
+ if me11:
+ mef.seek(0x10)
+ header = bytearray(mef.read(0x20))
+ header[0x0b] = 0x00
+ else:
+ mef.seek(0)
+ header = bytearray(mef.read(0x30))
+ header[0x1b] = 0x00
+ checksum = (0x100 - sum(header) & 0xff) & 0xff
+
+ print("Correcting checksum (0x{:02x})...".format(checksum))
+ # The checksum is just the two's complement of the sum of the first
+ # 0x30 bytes in ME < 11 or bytes 0x10:0x30 in ME >= 11 (except for
+ # 0x1b, the checksum itself). In other words, the sum of those
+ # bytes must be always 0x00.
+ mef.write_to(0x1b, pack("B", checksum))
+
+ print("Reading FTPR modules list...")
+ if me11:
+ end_addr, ftpr_offset = \
+ check_and_remove_modules_me11(mef, me_end,
+ ftpr_offset, ftpr_length,
+ min_ftpr_offset,
+ args.relocate,
+ args.keep_modules)
+ else:
+ end_addr, ftpr_offset = \
+ check_and_remove_modules(mef, me_end, ftpr_offset,
+ min_ftpr_offset, args.relocate,
+ args.keep_modules)
+
+ if end_addr > 0:
+ end_addr = max(end_addr, extra_part_end)
+ end_addr = (end_addr // 0x1000 + 1) * 0x1000
+ end_addr += spared_blocks * 0x1000
+
+ print("The ME minimum size should be {0} bytes "
+ "({0:#x} bytes)".format(end_addr))
+
+ if me_start > 0:
+ print("The ME region can be reduced up to:\n"
+ " {:08x}:{:08x} me"
+ .format(me_start, me_start + end_addr - 1))
+ elif args.truncate:
+ print("Truncating file at {:#x}...".format(end_addr))
+ f.truncate(end_addr)
+
+ if args.soft_disable or args.soft_disable_only:
+ if me11:
+ print("Setting the HAP bit in PCHSTRP0 to disable Intel ME...")
+ pchstrp0 |= (1 << 16)
+ fdf.write_to(fpsba, pack("<I", pchstrp0))
+ else:
+ print("Setting the AltMeDisable bit in PCHSTRP10 to disable "
+ "Intel ME...")
+ pchstrp10 |= (1 << 7)
+ fdf.write_to(fpsba + 0x28, pack("<I", pchstrp10))
if args.descriptor:
print("Removing ME/TXE R/W access to the other flash regions...")
- fdf.write_to(fmba + 0x4, pack("<I", 0x04040000))
+ if me11:
+ flmstr2 = 0x00400500
+ else:
+ fdf.seek(fmba + 0x4)
+ flmstr2 = (unpack("<I", fdf.read(4))[0] | 0x04040000) & 0x0404ffff
+
+ fdf.write_to(fmba + 0x4, pack("<I", flmstr2))
if args.extract_descriptor:
if args.truncate:
@@ -664,12 +846,14 @@ if __name__ == "__main__":
if bios_start == me_end:
print("Modifying the regions of the extracted descriptor...")
print(" {:08x}:{:08x} me --> {:08x}:{:08x} me"
- .format(me_start, me_end - 1, me_start, end_addr - 1))
+ .format(me_start, me_end - 1,
+ me_start, me_start + end_addr - 1))
print(" {:08x}:{:08x} bios --> {:08x}:{:08x} bios"
- .format(bios_start, bios_end - 1, end_addr, bios_end - 1))
+ .format(bios_start, bios_end - 1,
+ me_start + end_addr, bios_end - 1))
- flreg1 = start_end_to_flreg(end_addr, bios_end)
- flreg2 = start_end_to_flreg(me_start, end_addr)
+ flreg1 = start_end_to_flreg(me_start + end_addr, bios_end)
+ flreg2 = start_end_to_flreg(me_start, me_start + end_addr)
fdf_copy.seek(frba + 0x4)
fdf_copy.write(pack("<II", flreg1, flreg2))
@@ -678,31 +862,33 @@ if __name__ == "__main__":
"isn't equal to the end address of the ME\n region: if "
"you want to recover the space from the ME region you "
"have to\n manually modify the descriptor.\n")
-
- fdf_copy.close()
else:
print("Extracting the descriptor to \"{}\"..."
.format(args.extract_descriptor))
- fdf.save(args.extract_descriptor, fd_end - fd_start).close()
+ fdf_copy = fdf.save(args.extract_descriptor, fd_end - fd_start)
+
+ fdf_copy.close()
if args.extract_me:
if args.truncate:
print("Extracting and truncating the ME image to \"{}\"..."
.format(args.extract_me))
- mef_copy = mef.save(args.extract_me, end_addr - me_start)
+ mef_copy = mef.save(args.extract_me, end_addr)
else:
print("Extracting the ME image to \"{}\"..."
.format(args.extract_me))
mef_copy = mef.save(args.extract_me, me_end - me_start)
- sys.stdout.write("Checking the FTPR RSA signature of the extracted ME "
- "image... ")
- print_check_partition_signature(mef_copy, ftpr_offset +
- ftpr_mn2_offset - me_start)
+ if not me6_ignition:
+ print("Checking the FTPR RSA signature of the extracted ME "
+ "image... ", end="")
+ print_check_partition_signature(mef_copy,
+ ftpr_offset + ftpr_mn2_offset)
mef_copy.close()
- sys.stdout.write("Checking the FTPR RSA signature... ")
- print_check_partition_signature(f, ftpr_offset + ftpr_mn2_offset)
+ if not me6_ignition:
+ print("Checking the FTPR RSA signature... ", end="")
+ print_check_partition_signature(mef, ftpr_offset + ftpr_mn2_offset)
f.close()
diff --git a/util/me_cleaner/setup.py b/util/me_cleaner/setup.py
new file mode 100755
index 0000000000..92fd359ad4
--- /dev/null
+++ b/util/me_cleaner/setup.py
@@ -0,0 +1,22 @@
+#!/usr/bin/python
+
+from setuptools import setup
+
+setup(
+ name="me_cleaner",
+ version="1.2",
+ description="Tool for partial deblobbing of Intel ME/TXE firmware images",
+ url="https://github.com/corna/me_cleaner",
+ author="Nicola Corna",
+ author_email="nicola@corna.info",
+ license="GPLv3+",
+ scripts=['me_cleaner.py'],
+ classifiers=[
+ 'Development Status :: 4 - Beta',
+ 'Intended Audience :: Developers',
+ 'License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)',
+ 'Operating System :: OS Independent',
+ 'Programming Language :: Python :: 2',
+ 'Programming Language :: Python :: 3',
+ ]
+)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 21:41:38 +0000