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# Copyright 2017 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Generate C/C++ source from certificate.
Usage:
generate-spdy-session-fuzzer-includes.py input_filename output_filename
Load the PEM block from `input_filename` certificate, perform base64 decoding
and hex encoding, and save it in `output_filename` so that it can be directly
included from C/C++ source as a char array.
"""
import base64
import re
import sys
import textwrap
input_filename = sys.argv[1]
output_filename = sys.argv[2]
# Load PEM block.
with open(input_filename, 'r') as f:
match = re.search(
r"-----BEGIN CERTIFICATE-----\n(.+)-----END CERTIFICATE-----\n",
f.read(), re.DOTALL)
text = match.group(1)
# Perform Base64 decoding.
data = base64.b64decode(text)
# Hex format data.
hex_encoded = ", ".join("0x{:02x}".format(ord(c)) for c in data)
# Write into |output_filename| wrapped at 80 columns.
with open(output_filename, 'w') as f:
f.write(textwrap.fill(hex_encoded, 80))
f.write("\n")
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