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February 9, 2023 16:23
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Python gpt.bin decoder (gpt.bin for Xiaomi MiPad2, but probably for other plateforms too) ; you'll want https://gist.github.com/u1735067/b3a23c9461e95433387f285f6e0860ca
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| #!python3 | |
| ''' BSD 3-Clause License — but if it was useful to you, you may tell me :) | |
| Copyright (c) 2016-2017, Alexandre Levavasseur | |
| All rights reserved. | |
| Redistribution and use in source and binary forms, with or without | |
| modification, are permitted provided that the following conditions are met: | |
| * Redistributions of source code must retain the above copyright | |
| notice, this list of conditions and the following disclaimer. | |
| * Redistributions in binary form must reproduce the above copyright | |
| notice, this list of conditions and the following disclaimer in the | |
| documentation and/or other materials provided with the distribution. | |
| * Neither the name of the copyright holder nor the names of its | |
| contributors may be used to endorse or promote products | |
| derived from this software without specific prior written permission. | |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | |
| ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY | |
| DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
| ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| ''' | |
| import sys, io | |
| from struct import unpack | |
| from uuid import UUID | |
| # Utils | |
| try: | |
| # See https://gist.github.com/Alex131089/b3a23c9461e95433387f285f6e0860ca | |
| # and put guids.py in the same location | |
| from guids import guids | |
| except: | |
| guids = {} | |
| # https://stackoverflow.com/questions/1094841/reusable-library-to-get-human-readable-version-of-file-size | |
| def sizeof_fmt(num, suffix='B'): | |
| for unit in ['','Ki','Mi','Gi','Ti','Pi','Ei','Zi']: | |
| if abs(num) < 1024.0: | |
| return "%g %s%s" % (num, unit, suffix) | |
| num /= 1024.0 | |
| return "%g %s%s" % (num, 'Yi', suffix) | |
| # Help | |
| if len(sys.argv) < 2: | |
| print('Usage: ./{} <gpt.bin>'.format(sys.argv[0])) | |
| exit(-1) | |
| # Defines | |
| # https://github.com/android-ia/vendor_intel_common/blob/master/gpt_bin/gpt_ini2bin.py | |
| expected_magic = 0x6a8b0da1 | |
| header_len = 0xC # = 3*4 : A1 0D 8B 6A 00 00 00 00 0D 00 00 00 | |
| # MAGIC Start LBA ENTRY COUNT | |
| entry_len = 0x6C | |
| # Now start | |
| # http://www.devdungeon.com/content/working-binary-data-python | |
| with open(sys.argv[1], "rb") as binary_file: | |
| # Read the whole file at once | |
| data = binary_file.read() | |
| # https://stackoverflow.com/questions/18563018/how-to-remove-a-range-of-bytes-from-a-bytes-object-in-python | |
| #del data[0:0xc] | |
| # https://stackoverflow.com/questions/20024490/how-to-split-a-byte-string-into-separate-bytes-in-python | |
| entries = [data[i:i+entry_len] for i in range(header_len, len(data)-header_len, entry_len)] | |
| magic, start_lba, entries_count = unpack('<LLL', data[:header_len]) | |
| print('{:<16} = 0x{:x} ({})'.format('Magic', magic, ('valid' if magic == expected_magic else 'invalid, 0x{:x} expected'.format(expected_magic)))) | |
| print('{:<16} = {}'.format('Start LBA', start_lba)) | |
| print('{:<16} = {} (file size allows {} entries)'.format('Partition count', entries_count, len(entries))) | |
| print() | |
| print ('{:<36} {:<10} {:36}\t{}'.format('Partition name', 'Size', 'GPT Type GUID', 'Partition UUID')) | |
| print ('{:-<36} {:-<10} {:-<36}\t{:-<36}'.format('', '', '', '')) | |
| for entry in entries: | |
| # https://stackoverflow.com/questions/14859578/how-to-read-bytes-as-stream-in-python-3 | |
| # https://docs.python.org/3/library/io.html | |
| entry = io.BytesIO(entry) | |
| # https://docs.python.org/3/library/struct.html | |
| size = unpack('<L', entry.read(4))[0] | |
| size_pp = sizeof_fmt(size*1024*1024) | |
| #print(size[0], 'MB') | |
| # https://docs.python.org/3/library/codecs.html#standard-encodings | |
| # https://stackoverflow.com/questions/1185524/how-to-trim-whitespace-including-tabs | |
| name = entry.read(0x48).decode('utf_16_le').strip('\0') | |
| #print(name) | |
| # https://docs.python.org/3.1/library/uuid.html | |
| guid = UUID(bytes_le=entry.read(0x10)) | |
| guid_name = guids[guid] if guid in guids else str(guid) | |
| #print(guid) | |
| puid = UUID(bytes_le=entry.read(0x10)) | |
| puid_name = guids[puid] if puid in guids else str(puid) | |
| #print(puid) | |
| print ('{:<36} {:<10} {:36}\t{}'.format(name, size_pp, guid_name, puid_name)) | |
| end = entry.read() | |
| if len(end) > 0: | |
| print('Extra data:', end) | |
| ''' | |
| --Sample outputs : | |
| PS D:\Dev\GPT> py -3 .\read.py .\gpt_dual.bin | |
| Magic = 0x6a8b0da1 (valid) | |
| Start LBA = 0 | |
| Partition count = 13 (file size allows 13 entries) | |
| Partition name Size GPT Type GUID Partition UUID | |
| ------------------------------------ ---------- ------------------------------------ ------------------------------------ | |
| android_persistent 7 MiB Linux filesystem data Android-IA Persistent | |
| android_config 8 MiB Linux filesystem data Android-IA Config | |
| android_factory 10 MiB Linux filesystem data Android-IA Factory | |
| android_misc 6 MiB Android-IA Misc Android-IA Misc | |
| android_metadata 16 MiB Android-IA Metadata Android-IA Metadata | |
| android_bk1 16 MiB Linux filesystem data Linux filesystem data | |
| android_bootloader 32 MiB EFI System partition Android-IA Bootloader | |
| android_bootloader2 32 MiB Windows Basic data partition Android-IA Bootloader2 | |
| android_boot 32 MiB Android-IA Boot Android-IA Boot | |
| android_recovery 32 MiB Android-IA Recovery Android-IA Recovery | |
| android_system 1.875 GiB Linux filesystem data Android-IA System | |
| android_cache 256 MiB Linux filesystem data Android-IA Cache | |
| android_data 12 GiB Linux filesystem data Android-IA Data | |
| PS D:\Dev\GPT> py -3 .\read.py .\gpt_miui.bin | |
| Magic = 0x6a8b0da1 (valid) | |
| Start LBA = 0 | |
| Partition count = 13 (file size allows 13 entries) | |
| Partition name Size GPT Type GUID Partition UUID | |
| ------------------------------------ ---------- ------------------------------------ ------------------------------------ | |
| android_persistent 7 MiB Linux filesystem data Android-IA Persistent | |
| android_config 8 MiB Linux filesystem data Android-IA Config | |
| android_factory 10 MiB Linux filesystem data Android-IA Factory | |
| android_misc 6 MiB Android-IA Misc Android-IA Misc | |
| android_metadata 16 MiB Android-IA Metadata Android-IA Metadata | |
| android_bk1 16 MiB Linux filesystem data Linux filesystem data | |
| android_bootloader 32 MiB EFI System partition Android-IA Bootloader | |
| android_bootloader2 32 MiB Windows Basic data partition Android-IA Bootloader2 | |
| android_boot 32 MiB Android-IA Boot Android-IA Boot | |
| android_recovery 32 MiB Android-IA Recovery Android-IA Recovery | |
| android_system 1.875 GiB Linux filesystem data Android-IA System | |
| android_cache 256 MiB Linux filesystem data Android-IA Cache | |
| android_data 4 PiB Linux filesystem data Android-IA Data | |
| ''' |
@davidtuti : if you're not afraid to open an hex editor, probably yes, but this script is not intended to make changes, only to read data. You can check your modifications after with it though.
Hint, if I'm not making mistake : size is 4 bytes (xx xx xx xx) just before the name, in MB. Bytes are reversed due to endianness.
Example : https://imgur.com/a/Xvk6s (0x00000780 = 1920MB = 1,875GB (/1024))
Thank you, this works perfect for me.
my result (output) here.
Magic = 0x6a8b0da1 (valid)
Start LBA = 0
Partition count = 11 (file size allows 11 entries)
Partition name Size GPT Type GUID Partition UUID
------------------------------------ ---------- ------------------------------------ ------------------------------------
android_bootloader 100 MiB c12a7328-f81f-11d2-ba4b-00a0c93ec93b 2568845d-2332-4675-bc39-8fa5a4748d15
android_bootloader2 100 MiB ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 114eaffe-1552-4022-b26e-9b053604cf84
android_boot 30 MiB 49a4d17f-93a3-45c1-a0de-f50b2ebe2599 49a4d17f-93a3-45c1-a0de-f50b2ebe2599
android_recovery 30 MiB 4177c722-9e92-4aab-8644-43502bfd5506 4177c722-9e92-4aab-8644-43502bfd5506
android_misc 1 MiB ef32a33b-a409-486c-9141-9ffb711f6266 ef32a33b-a409-486c-9141-9ffb711f6266
android_metadata 16 MiB 20ac26be-20b7-11e3-84c5-6cfdb94711e9 20ac26be-20b7-11e3-84c5-6cfdb94711e9
android_system 2.5 GiB 0fc63daf-8483-4772-8e79-3d69d8477de4 38f428e6-d326-425d-9140-6e0ea133647c
android_cache 256 MiB 0fc63daf-8483-4772-8e79-3d69d8477de4 a893ef21-e428-470a-9e55-0668fd91a2d9
android_data 4 PiB 0fc63daf-8483-4772-8e79-3d69d8477de4 dc76dda9-5ac1-491c-af42-a82591580c0d
android_persistent 1 MiB 0fc63daf-8483-4772-8e79-3d69d8477de4 ebc597d0-2053-4b15-8b64-e0aac75f4db1
android_config 8 MiB 0fc63daf-8483-4772-8e79-3d69d8477de4 bd59408b-4514-490d-bf12-9878d963f378
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Hi!
Congratulations for these wonderfoul development. Is possible to can change the size of the partition with these script? Thanks, and sorry for my English!