mirror of https://github.com/CalyxOS/scripts
276 lines
8.5 KiB
Python
276 lines
8.5 KiB
Python
#!/usr/bin/env python3
|
|
#
|
|
# Copyright 2021 The Android Open Source Project
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
import argparse
|
|
import logging
|
|
import os
|
|
import sys
|
|
from lxml.etree import XMLParser
|
|
import yaml
|
|
|
|
#from google3.third_party.devsite.androidsource.en.docs.core.architecture.bootloader.tools.pixel.fw_unpack import fbpack
|
|
import fbpack
|
|
|
|
def bytes_to_str(bstr):
|
|
return bstr.decode().rstrip('\x00')
|
|
|
|
|
|
def print_pack_header(pack):
|
|
print('magic: {:#x}'.format(pack.magic))
|
|
print('version: {}'.format(pack.version))
|
|
print('header size: {}'.format(pack.header_size))
|
|
print('entry header size: {}'.format(pack.entry_header_size))
|
|
platform = bytes_to_str(pack.platform)
|
|
print('platform: {}'.format(platform))
|
|
pack_version = bytes_to_str(pack.pack_version)
|
|
print('pack version: {}'.format(pack_version))
|
|
print('slock type: {}'.format(pack.slot_type))
|
|
print('data align: {}'.format(pack.data_align))
|
|
print('total entries: {}'.format(pack.total_entries))
|
|
print('total size: {}'.format(pack.total_size))
|
|
|
|
|
|
def print_pack_entry(entry, prefix):
|
|
name = bytes_to_str(entry.name)
|
|
print('{}name: {}'.format(prefix, name))
|
|
etype = 'unknown'
|
|
if entry.type == fbpack.FBPACK_PARTITION_TABLE:
|
|
etype = 'partiton table'
|
|
elif entry.type == fbpack.FBPACK_PARTITION_DATA:
|
|
etype = 'partition'
|
|
elif entry.type == fbpack.FBPACK_SIDELOAD_DATA:
|
|
etype = 'sideload'
|
|
else:
|
|
print('entry else')
|
|
print('{}type: {}'.format(prefix, etype))
|
|
product = bytes_to_str(entry.product)
|
|
print('{}product: {}'.format(prefix, product))
|
|
print('{}offset: {:#x} ({})'.format(prefix, entry.offset, entry.offset))
|
|
print('{}size: {:#x} ({})'.format(prefix, entry.size, entry.size))
|
|
print('{}slotted: {}'.format(entry.size, bool(entry.slotted)))
|
|
print('{}crc32: {:#08x}'.format(prefix, entry.crc32))
|
|
|
|
|
|
def cmd_info(args):
|
|
with open(args.file, 'rb') as f:
|
|
pack = fbpack.PackHeader.from_bytes(f.read(len(fbpack.PackHeader())))
|
|
|
|
if pack.version != fbpack.FBPACK_VERSION:
|
|
raise NotImplementedError('unsupported version {}'.format(pack.version))
|
|
|
|
print('Header:')
|
|
print_pack_header(pack)
|
|
|
|
print('\nEntries:')
|
|
for i in range(1, pack.total_entries + 1):
|
|
entry = fbpack.PackEntry.from_bytes(f.read(len(fbpack.PackEntry())))
|
|
print('Entry {}: {{'.format(i))
|
|
print_pack_entry(entry, ' ')
|
|
print('}')
|
|
|
|
|
|
def align_up(val, align):
|
|
return (val + align - 1) & ~(align - 1)
|
|
|
|
|
|
def create_pack_file(file_name, in_dir_name, pack):
|
|
pack.total_entries = len(pack.entries)
|
|
offset = pack.header_size + pack.total_entries * pack.entry_header_size
|
|
with open(file_name, 'wb') as f:
|
|
# write entries data
|
|
for entry in pack.entries:
|
|
# align data
|
|
offset = align_up(offset, pack.data_align)
|
|
entry.offset = offset
|
|
f.seek(offset)
|
|
fin_name = os.path.join(in_dir_name, entry.filepath)
|
|
with open(fin_name, 'rb') as fin:
|
|
data = fin.read()
|
|
entry.size = len(data)
|
|
f.write(data)
|
|
offset += len(data)
|
|
|
|
pack.total_size = offset
|
|
f.seek(0)
|
|
# write pack header
|
|
f.write(bytes(pack))
|
|
# iterate over entries again to write entry header
|
|
for entry in pack.entries:
|
|
f.write(bytes(entry))
|
|
|
|
|
|
def cmd_create(args):
|
|
if not (args.file.lower().endswith('.xml') or
|
|
args.file.lower().endswith('.yaml')):
|
|
raise NotImplementedError('{} type not supported'.format(args.file))
|
|
|
|
pack = None
|
|
if args.file.lower().endswith('.yaml'):
|
|
pack = yaml.parse(args.file)
|
|
else:
|
|
pack = XMLParser.parse(args.file)
|
|
pack.pack_version = bytes(str(args.pack_version).encode('ascii'))
|
|
pack.header_size = len(pack)
|
|
|
|
# create output directory if missing
|
|
if not os.path.isdir(args.out_dir):
|
|
os.makedirs(args.out_dir, 0o755)
|
|
|
|
file_name = os.path.join(args.out_dir, pack.name + '.img')
|
|
|
|
create_pack_file(file_name, args.in_dir, pack)
|
|
|
|
|
|
def product_match(products, product):
|
|
return product in products.split(b'|')
|
|
|
|
|
|
def copyfileobj(src, dst, file_size):
|
|
while file_size > 0:
|
|
buf = src.read(min(128 * 1024, file_size))
|
|
dst.write(buf)
|
|
file_size -= len(buf)
|
|
|
|
|
|
def cmd_unpack(args):
|
|
with open(args.file, 'rb') as f:
|
|
pack = fbpack.PackHeader.from_bytes(f.read(len(fbpack.PackHeader())))
|
|
|
|
if pack.version != fbpack.FBPACK_VERSION:
|
|
raise NotImplementedError('unsupported version {}'.format(pack.version))
|
|
|
|
entries = []
|
|
# create list of entries we want to extact
|
|
for _ in range(pack.total_entries):
|
|
entry = fbpack.PackEntry.from_bytes(f.read(len(fbpack.PackEntry())))
|
|
name = bytes_to_str(entry.name)
|
|
if not args.partitions or name in args.partitions:
|
|
# if both product are valid then match product name too
|
|
if not args.product or not entry.product or product_match(
|
|
entry.product, args.product):
|
|
entries.append(entry)
|
|
|
|
if not entries and not args.unpack_ver:
|
|
raise RuntimeError('no images to unpack')
|
|
|
|
# create output directory if it does not exist
|
|
if not os.path.isdir(args.out_dir):
|
|
os.makedirs(args.out_dir, 0o755)
|
|
|
|
out_files = {}
|
|
# write file per entry
|
|
for entry in entries:
|
|
name = bytes_to_str(entry.name)
|
|
logging.info('Unpacking {} (size: {}, offset: {})'.format(
|
|
name, entry.size, entry.offset))
|
|
f.seek(entry.offset)
|
|
entry_filename = os.path.join(args.out_dir, name + '.img')
|
|
instance = out_files.get(entry_filename, 0) + 1
|
|
out_files[entry_filename] = instance
|
|
if instance > 1:
|
|
entry_filename = os.path.join(args.out_dir,
|
|
name + '({}).img'.format(instance - 1))
|
|
with open(entry_filename, 'wb') as entry_file:
|
|
copyfileobj(f, entry_file, entry.size)
|
|
|
|
if args.unpack_ver:
|
|
ver_file_path = os.path.join(args.out_dir, 'version.txt')
|
|
with open(ver_file_path, 'w') as ver_file:
|
|
ver_file.write(bytes_to_str(pack.pack_version))
|
|
|
|
logging.info('Done')
|
|
|
|
|
|
def parse_args():
|
|
parser = argparse.ArgumentParser(
|
|
description='Tool to create/modify/inspect fastboot packed images')
|
|
parser.add_argument(
|
|
'-v',
|
|
'--verbosity',
|
|
action='count',
|
|
default=0,
|
|
help='increase output verbosity')
|
|
|
|
subparsers = parser.add_subparsers()
|
|
|
|
# info command
|
|
info = subparsers.add_parser('info')
|
|
info.add_argument('file', help='packed image file')
|
|
info.set_defaults(func=cmd_info)
|
|
|
|
# create command
|
|
create = subparsers.add_parser('create')
|
|
create.add_argument(
|
|
'-d', '--in_dir', help='directory to search for data files', default='.')
|
|
create.add_argument(
|
|
'-o',
|
|
'--out_dir',
|
|
help='output directory for the packed image',
|
|
default='.')
|
|
create.add_argument(
|
|
'-v', '--pack_version', help='Packed image version ', default='')
|
|
create.add_argument(
|
|
'file', help='config file describing packed image (yaml/xml)')
|
|
create.set_defaults(func=cmd_create)
|
|
|
|
# unpack command
|
|
unpack = subparsers.add_parser('unpack')
|
|
unpack.add_argument(
|
|
'-o', '--out_dir', help='directory to store unpacked images', default='.')
|
|
unpack.add_argument(
|
|
'-p', '--product', help='filter images by product', default='')
|
|
unpack.add_argument(
|
|
'-v',
|
|
'--unpack_ver',
|
|
help='Unpack version to a file',
|
|
action='store_true')
|
|
unpack.add_argument('file', help='packed image file')
|
|
unpack.add_argument(
|
|
'partitions',
|
|
metavar='PART',
|
|
type=str,
|
|
nargs='*',
|
|
help='Partition names to extract (default all).')
|
|
unpack.set_defaults(func=cmd_unpack)
|
|
|
|
args = parser.parse_args()
|
|
# make sure a command was passed
|
|
if not hasattr(args, 'func'):
|
|
parser.print_usage()
|
|
print('fbpacktool.py: error: no command was passed')
|
|
sys.exit(2)
|
|
|
|
return args
|
|
|
|
|
|
def main():
|
|
args = parse_args()
|
|
|
|
if args.verbosity >= 2:
|
|
log_level = logging.DEBUG
|
|
elif args.verbosity == 1:
|
|
log_level = logging.INFO
|
|
else:
|
|
log_level = logging.WARNING
|
|
|
|
logging.basicConfig(level=log_level)
|
|
|
|
# execute command
|
|
args.func(args)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|