#!/usr/bin/env python3 from __future__ import absolute_import, division, print_function import configparser import argparse import functools import hashlib import json import logging import os import shutil import tempfile import requests import sh import redo from mardor.reader import MarReader from mardor.signing import get_keysize log = logging.getLogger(__name__) ALLOWED_URL_PREFIXES = [ "http://download.cdn.mozilla.net/pub/mozilla.org/firefox/nightly/", "http://download.cdn.mozilla.net/pub/firefox/nightly/", "https://mozilla-nightly-updates.s3.amazonaws.com", "https://queue.taskcluster.net/", "http://ftp.mozilla.org/", "http://download.mozilla.org/", "https://archive.mozilla.org/", ] def find_file(directory, filename): log.debug("Searching for %s in %s", filename, directory) for root, dirs, files in os.walk(directory): if filename in files: f = os.path.join(root, filename) log.debug("Found %s", f) return f def get_option(directory, filename, section, option): log.debug("Exctracting [%s]: %s from %s/**/%s", section, option, directory, filename) f = find_file(directory, filename) config = configparser.ConfigParser() config.read(f) rv = config.get(section, option) log.debug("Found %s", rv) return rv def verify_signature(mar, certs): log.info("Checking %s signature", mar) with open(mar, 'rb') as mar_fh: m = MarReader(mar_fh) m.verify(verify_key=certs.get(m.signature_type)) def is_lzma_compressed_mar(mar): log.info("Checking %s for lzma compression", mar) result = MarReader(open(mar, 'rb')).compression_type == 'xz' if result: log.info("%s is lzma compressed", mar) else: log.info("%s is not lzma compressed", mar) return result @redo.retriable() def download(url, dest, mode=None): log.debug("Downloading %s to %s", url, dest) r = requests.get(url) r.raise_for_status() bytes_downloaded = 0 with open(dest, 'wb') as fd: for chunk in r.iter_content(4096): fd.write(chunk) bytes_downloaded += len(chunk) log.debug('Downloaded %s bytes', bytes_downloaded) if 'content-length' in r.headers: log.debug('Content-Length: %s bytes', r.headers['content-length']) if bytes_downloaded != int(r.headers['content-length']): raise IOError('Unexpected number of bytes downloaded') if mode: log.debug("chmod %o %s", mode, dest) os.chmod(dest, mode) def change_mar_compression(work_env, file_path): """Toggles MAR compression format between BZ2 and LZMA""" cmd = sh.Command(os.path.join(work_env.workdir, "change_mar_compression.pl")) log.debug("Changing MAR compression of %s", file_path) out = cmd("-r", file_path, _env=work_env.env, _timeout=240, _err_to_out=True) if out: log.debug(out) def unpack(work_env, mar, dest_dir): os.mkdir(dest_dir) unwrap_cmd = sh.Command(os.path.join(work_env.workdir, "unwrap_full_update.pl")) log.debug("Unwrapping %s", mar) env = work_env.env if not is_lzma_compressed_mar(mar): env['MAR_OLD_FORMAT'] = '1' elif 'MAR_OLD_FORMAT' in env: del env['MAR_OLD_FORMAT'] out = unwrap_cmd(mar, _cwd=dest_dir, _env=env, _timeout=240, _err_to_out=True) if out: log.debug(out) def get_hash(path, hash_type="sha512"): h = hashlib.new(hash_type) with open(path, "rb") as f: for chunk in iter(functools.partial(f.read, 4096), ''): h.update(chunk) return h.hexdigest() class WorkEnv(object): def __init__(self): self.workdir = tempfile.mkdtemp() def setup(self): self.download_scripts() self.download_martools() def download_scripts(self): # unwrap_full_update.pl is not too sensitive to the revision prefix = "https://hg.mozilla.org/mozilla-central/raw-file/default/" \ "tools/update-packaging" for f in ("unwrap_full_update.pl", "change_mar_compression.pl"): url = "{prefix}/{f}".format(prefix=prefix, f=f) download(url, dest=os.path.join(self.workdir, f), mode=0o755) def download_martools(self): url = "https://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/" \ "latest-mozilla-central/mar-tools/linux64/mar" download(url, dest=os.path.join(self.workdir, "mar"), mode=0o755) def cleanup(self): shutil.rmtree(self.workdir) @property def env(self): my_env = os.environ.copy() my_env['LC_ALL'] = 'C' my_env['MAR'] = os.path.join(self.workdir, "mar") return my_env def verify_allowed_url(mar): if not any(mar.startswith(prefix) for prefix in ALLOWED_URL_PREFIXES): raise ValueError("{mar} is not in allowed URL prefixes: {p}".format( mar=mar, p=ALLOWED_URL_PREFIXES )) def main(): parser = argparse.ArgumentParser() parser.add_argument("--artifacts-dir", required=True) parser.add_argument("--sha1-signing-cert", required=True) parser.add_argument("--sha384-signing-cert", required=True) parser.add_argument("--task-definition", required=True, type=argparse.FileType('r')) parser.add_argument("--output-filename", required=True) parser.add_argument("-q", "--quiet", dest="log_level", action="store_const", const=logging.WARNING, default=logging.DEBUG) args = parser.parse_args() logging.basicConfig(format="%(asctime)s - %(levelname)s - %(message)s", level=args.log_level) task = json.load(args.task_definition) signing_certs = { 'sha1': open(args.sha1_signing_cert, 'rb').read(), 'sha384': open(args.sha384_signing_cert, 'rb').read(), } assert(get_keysize(signing_certs['sha1']) == 2048) assert(get_keysize(signing_certs['sha384']) == 4096) manifest = [] for e in task["extra"]["funsize"]["completes"]: to_mar = e["to_mar"] locale = e["locale"] output_filename = args.output_filename.format(locale=locale) verify_allowed_url(to_mar) work_env = WorkEnv() work_env.setup() complete_mars = {} dest = os.path.join(work_env.workdir, "to.mar") unpack_dir = os.path.join(work_env.workdir, "to") download(to_mar, dest) if not os.getenv("MOZ_DISABLE_MAR_CERT_VERIFICATION"): verify_signature(dest, signing_certs) # Changing the compression strips the signature change_mar_compression(work_env, dest) complete_mars["hash"] = get_hash(dest) unpack(work_env, dest, unpack_dir) log.info("AV-scanning %s ...", unpack_dir) sh.clamscan("-r", unpack_dir, _timeout=600, _err_to_out=True) log.info("Done.") mar_data = { "file_to_sign": output_filename, "hash": get_hash(dest), "appName": get_option(unpack_dir, filename="application.ini", section="App", option="Name"), "version": get_option(unpack_dir, filename="application.ini", section="App", option="Version"), "to_buildid": get_option(unpack_dir, filename="application.ini", section="App", option="BuildID"), "toVersion": e["toVersion"], "toBuildNumber": e["toBuildNumber"], "platform": e["platform"], "locale": e["locale"], } shutil.copy(dest, os.path.join(args.artifacts_dir, output_filename)) work_env.cleanup() manifest.append(mar_data) manifest_file = os.path.join(args.artifacts_dir, "manifest.json") with open(manifest_file, "w") as fp: json.dump(manifest, fp, indent=2, sort_keys=True) if __name__ == '__main__': main()