author Gregory Szorc <>
Fri, 04 Aug 2017 15:43:02 -0700
changeset 637918 de7a0350a180d67d1e22b1a0e4620b30537a02d3
parent 479388 77847050bf7229bf8592960b9f45588d918f4555
child 800622 8c05aa64e11e44d518dbbf95d107578b955bc910
permissions -rw-r--r--
Merge draft head

# 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

import binascii

def _file_byte_generator(filename):
  with open(filename, "rb") as f:
    contents =

    # Treat empty files the same as a file containing a lone 0;
    # a single-element array will fail cert verifcation just as an
    # empty array would.
    if not contents:
      return ['\0']

    return contents

def _create_header(array_name, cert_bytes):
  hexified = ["0x" + binascii.hexlify(byte) for byte in cert_bytes]
  substs = { 'array_name': array_name, 'bytes': ', '.join(hexified) }
  return "const uint8_t %(array_name)s[] = {\n%(bytes)s\n};\n" % substs

# Create functions named the same as the data arrays that we're going to
# write to the headers, so we don't have to duplicate the names like so:
#   def arrayName(header, cert_filename):
#     header.write(_create_header("arrayName", cert_filename))
array_names = [

for n in array_names:
  # Make sure the lambda captures the right string.
  globals()[n] = lambda header, cert_filename, name=n: header.write(_create_header(name, _file_byte_generator(cert_filename)))