forked from BrowserSecurity/ExtensionCrawler
146 lines
4.8 KiB
Python
Executable File
146 lines
4.8 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# Copyright (C) 2016,2017 The University of Sheffield, UK
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import getopt
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import os
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import sys
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import glob
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import tarfile
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import traceback
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import jsbeautifier
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from multiprocessing import Pool
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from zipfile import ZipFile
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from functools import partial
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import re
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from ExtensionCrawler.config import *
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from ExtensionCrawler.util import *
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def help():
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print("grepper [OPTION] BASEDIR GREP1 [GREP2...]")
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print(" GREP1 [GREP2...] regex patterns")
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print(" BASEDIR directory for output")
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print(" -h print this help text")
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print(" -b beautify JavaScript before matching")
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print(" -a <DIR> archive directory")
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print(" -p <PREFIX> three-letter-prefix")
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print(" -t <THREADS> number of threads to use")
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def process_crx(ext_id, date, crx, greps, beautify, out_f):
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with ZipFile(crx) as z:
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for zip_file_info in z.infolist():
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if not zip_file_info.filename.endswith(".js"):
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continue
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with z.open(zip_file_info) as f:
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content = f.read().decode(errors="surrogateescape")
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if beautify:
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content = jsbeautifier.beautify(content)
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for i, line in enumerate(content.splitlines()):
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for gr in greps:
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if not re.search(gr, line):
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continue
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args = [
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ext_id, date, gr, zip_file_info.filename +
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" (line " + str(i + 1) + ")", line
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]
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print("|".join(args), file=out_f)
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def process_id(archivedir, outdir, greps, beautify, verbose, ext_id):
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txt = ""
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txt = logmsg(verbose, txt, "Processing {} ...\n".format(ext_id))
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tarpath = archive_file(archivedir, ext_id)
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greppath = os.path.join(outdir, ext_id + ".grep")
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if os.path.exists(greppath):
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os.remove(greppath)
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with open(greppath, "w") as out_f:
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with tarfile.open(tarpath, 'r') as t:
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for tar_info in t.getmembers():
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if not tar_info.name.endswith(".crx") or tar_info.size is 0:
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continue
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date = tar_info.name.split("/")[1]
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try:
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with t.extractfile(tar_info) as crx:
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process_crx(ext_id, date, crx, greps, beautify, out_f)
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except Exception:
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txt = logmsg(
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verbose, txt,
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"Exception when handling {}:\n".format(tar_info.name))
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txt = logmsg(verbose, txt, traceback.format_exc())
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return txt
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def main(argv):
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archive = "archive"
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prefix = ""
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beautify = False
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parallel = 8
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try:
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opts, args = getopt.getopt(
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argv, "ha:p:bt:", ["archive=", "prefix=", "beautify", "threads="])
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except getopt.GetoptError:
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help()
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sys.exit(2)
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for opt, arg in opts:
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if opt == '-h':
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help()
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sys.exit()
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elif opt in ("-a", "--archive"):
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archive = arg
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elif opt in ("-p", "--prefix"):
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prefix = arg
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elif opt in ("-b", "--beautify"):
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beautify = True
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elif opt in ("-t", "--threads"):
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parallel = int(arg)
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if len(args) < 2:
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help()
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sys.exit(2)
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outdir = args[0]
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greps = args[1:]
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archivedir = os.path.join(archive, "data")
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threeletterdirs = glob.glob(os.path.join(archivedir, prefix + "*"))
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print("Using archive '{}'".format(archive))
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print("Using prefix '{}'".format(prefix))
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print("Using beautifier? '{}'".format(beautify))
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print("Using {} threads".format(parallel))
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print("Found {} three-letter-dirs".format(len(threeletterdirs)))
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for threeletterdir in threeletterdirs:
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ext_ids = list(set([d[:32] for d in os.listdir(threeletterdir)]))
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with Pool(parallel) as p:
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for txt in p.imap(
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partial(process_id, archivedir, outdir, greps, beautify,
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True), ext_ids):
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sys.stdout.write(txt)
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sys.stdout.flush()
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print("Sucessfully finished grepping")
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if __name__ == "__main__":
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main(sys.argv[1:])
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