/usr/lib/python3/dist-packages/diffoscope/comparators/binwalk.py is in diffoscope 93ubuntu1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 | # -*- coding: utf-8 -*-
#
# diffoscope: in-depth comparison of files, archives, and directories
#
# Copyright © 2017 Chris Lamb <lamby@debian.org>
#
# diffoscope is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# diffoscope is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with diffoscope. If not, see <https://www.gnu.org/licenses/>.
import os
import re
import glob
import logging
from diffoscope.tempfiles import get_temporary_directory
from .utils.file import File
from .utils.archive import Archive
try:
from .rpm import RpmFile
except ImportError:
from .rpm_fallback import RpmFile
try:
import binwalk
except ImportError:
binwalk = None
logger = logging.getLogger(__name__)
class BinwalkFileContainer(Archive):
def open_archive(self):
return self
def close_archive(self):
self.source._unpacked.cleanup()
def get_member_names(self):
return sorted(self.source._members.keys())
def extract(self, member_name, dest_dir):
return self.source._members[member_name]
class BinwalkFile(File):
FILE_TYPE_RE = re.compile(r'\bcpio archive\b')
CONTAINER_CLASS = BinwalkFileContainer
@classmethod
def recognizes(cls, file):
if binwalk is None:
return False
if not super().recognizes(file):
return False
# RPM files are .cpio, but let's always leave it to the RPM comparator.
# This avoids the RpmFile > BinWalkFile > CpioFile > RpmFile circular
# ordering dependency.
if file.container and isinstance(file.container.source, RpmFile):
return False
# Don't recurse; binwalk has already found everything
if isinstance(file.container, cls.CONTAINER_CLASS):
return False
unpacked = get_temporary_directory(prefix='binwalk')
logger.debug("Extracting %s to %s", file.path, unpacked.name)
binwalk.scan(
file.path,
dd='cpio:cpio',
carve=True,
quiet=True,
signature=True,
directory=unpacked.name,
)
members = {
'{} file embedded at offset {}'.format(
os.path.splitext(x)[1],
os.path.basename(os.path.splitext(x)[0]),
): x
for x in glob.glob(os.path.join(unpacked.name, '*/*'))
}
logger.debug("Found %d embedded member(s)", len(members))
if not members:
unpacked.cleanup()
return False
file._members = members
file._unpacked = unpacked
return True
def compare(self, other, source=None):
difference = super().compare(other, source)
if difference is not None:
difference.add_comment(
"comprises of {} embedded members".format(len(self._members))
)
return difference
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