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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 textwrap
from pyasn1_modules import pem
def read_certificate(filename):
with open(filename) as f:
try:
return pem.readPemFromFile(
f, "-----BEGIN CERTIFICATE-----", "-----END CERTIFICATE-----"
)
except UnicodeDecodeError:
raise Exception(
f"Could not decode {filename} (it should be a PEM-encoded certificate)"
)
def write_header(output, array_name, certificates):
certificate_names = []
for index, certificate in enumerate(certificates):
certificate_name = f"{array_name}{index}"
certificate_names.append(
f"mozilla::Span({certificate_name}, sizeof({certificate_name}))"
)
output.write(f"const uint8_t {certificate_name}[] = {{\n")
certificate_bytes = read_certificate(certificate)
hexified = ", ".join(["0x%02x" % byte for byte in certificate_bytes])
wrapped = textwrap.wrap(hexified)
for line in wrapped:
output.write(f" {line}\n")
output.write("};\n")
output.write(
f'const mozilla::Span<const uint8_t> {array_name}[] = {{ {", ".join(certificate_names)} }};\n'
)
def generate(output, *args):
write_header(output, args[-1], args[0:-1])
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