replace-updater-certs.py

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# This Source Code Form is subject to the terms of the Mozilla Public

# License, v. 2.0. If a copy of the MPL was not distributed with this file,

# You can obtain one at http://mozilla.org/MPL/2.0/.

import os.path

import sys

cert_dir = sys.argv[1]

# Read twice, because strings cannot be copied

updater_data = open(sys.argv[2], "rb").read()

new_updater = open(sys.argv[2], "rb").read()

outfile = sys.argv[3]

cert_pairs = sys.argv[4:]

if (len(cert_pairs) % 2) != 0:

    print("Certs must be provided in pairs")

    sys.exit(1)

for find_cert, replace_cert in zip(*[iter(cert_pairs)] * 2):

    find = open(os.path.join(cert_dir, find_cert), "rb").read()

    replace = open(os.path.join(cert_dir, replace_cert), "rb").read()

    print("Looking for {}...".format(find_cert))

    if find in new_updater:

        print("Replacing {} with {}".format(find_cert, replace_cert))

        new_updater = new_updater.replace(find, replace)

    else:

        print("Didn't find {}...".format(find_cert))

if len(updater_data) != len(new_updater):

    print(

        "WARNING: new updater is not the same length as the old one (old: {}, new: {})".format(

            len(updater_data), len(new_updater)

if updater_data == new_updater:

    print("WARNING: updater is unchanged")

with open(outfile, "wb+") as f:

    f.write(new_updater)