DalvikBytecodeTampering/unpack.py at master · yangwenbo/DalvikBytecodeTampering

38 lines (32 loc) · 1.43 KB

#!/usr/bin/env python

# 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

from zipfile import ZipFile, ZipInfo

class ApkFile(ZipFile):

def extract(self, member, path=None, pwd=None):

if not isinstance(member, ZipInfo):

member = self.getinfo(member)

member.flag_bits ^= member.flag_bits%2

ZipFile.extract(self, member, path, pwd)

print 'extracting %s' % member.filename

def extractall(self, path=None, members=None, pwd=None):

map(lambda entry: self.extract(entry, path, pwd), members if members is not None and len(members)>0 else self.filelist)

if __name__ == '__main__':

parser = argparse.ArgumentParser(description='unpacks an APK that contains files which are wrongly marked as encrypted')

parser.add_argument('apk', type=str)

parser.add_argument('file', type=str, nargs='*')

args = parser.parse_args()

apk = ApkFile(args.apk,'r')

apk.extractall(members=args.file)

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