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#!/usr/bin/env python3 | ||
# | ||
# Copyright (c) 2022 Project CHIP Authors | ||
# All rights reserved. | ||
# | ||
# Licensed under the Apache License, Version 2.0 (the "License"); | ||
# you may not use this file except in compliance with the License. | ||
# You may obtain a copy of the License at | ||
# | ||
# http://www.apache.org/licenses/LICENSE-2.0 | ||
# | ||
# Unless required by applicable law or agreed to in writing, software | ||
# distributed under the License is distributed on an "AS IS" BASIS, | ||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
# See the License for the specific language governing permissions and | ||
# limitations under the License. | ||
# | ||
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import argparse | ||
import base64 | ||
import json | ||
import logging as log | ||
import os | ||
import subprocess | ||
import sys | ||
from collections import namedtuple | ||
from os.path import exists | ||
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CHIP_ROOT = os.path.dirname(os.path.realpath(__file__))[:-len(os.path.join('scripts', 'tools'))] | ||
chip_cert_exe = os.path.join(CHIP_ROOT, 'out', 'host', 'chip-cert') | ||
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if not os.path.exists(chip_cert_exe): | ||
print("Error: chip-cert executable not found.Please build chip-cert in connectedhomeip by ninja -C out/host") | ||
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def gen_test_certs(vendor_id: int, | ||
product_id: int, | ||
output: str): | ||
""" | ||
Generate Matter certificates according to given Vendor ID and Product ID using the chip-cert executable. | ||
To use own Product Attestation Authority certificate provide paa_cert_path and paa_key_path arguments. | ||
Without providing these arguments a PAA certificate will be get from /credentials/test/attestation directory | ||
in the Matter repository. | ||
Args: | ||
chip_cert_exe (str): path to chip-cert executable | ||
output (str): output path to store a newly generated certificates (CD, DAC, PAI) | ||
vendor_id (int): an identification number specific to Vendor | ||
product_id (int): an identification number specific to Product | ||
device_name (str): human-readable device name | ||
generate_cd (bool, optional): Generate Certificate Declaration and store it in thee output directory. Defaults to False. | ||
paa_cert_path (str, optional): provide PAA certification path. Defaults to None - a path will be set to | ||
/credentials/test/attestation directory. | ||
paa_key_path (str, optional): provide PAA key path. Defaults to None - a path will be set to | ||
/credentials/test/attestation directory. | ||
generate_all_certs: Generate the new DAC and PAI certificates | ||
Returns: | ||
dictionary: ["PAI_CERT": (str)<path to PAI cert .der file>, | ||
"DAC_CERT": (str)<path to DAC cert .der file>, | ||
"DAC_KEY": (str)<path to DAC key .der file>] | ||
""" | ||
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CD_PATH = CHIP_ROOT + "/credentials/test/certification-declaration/Chip-Test-CD-Signing-Cert.pem" | ||
CD_KEY_PATH = CHIP_ROOT + "/credentials/test/certification-declaration/Chip-Test-CD-Signing-Key.pem" | ||
PAA_PATH = CHIP_ROOT + "/credentials/test/attestation/Chip-Test-PAA-NoVID-Cert.pem" | ||
PAA_KEY_PATH = CHIP_ROOT + "/credentials/test/attestation/Chip-Test-PAA-NoVID-Key.pem" | ||
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attestation_certs = namedtuple("attestation_certs", ["dac_cert", "dac_key", "pai_cert"]) | ||
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log.info("Generating new Certification Declaration using chip-cert...") | ||
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# generate Certification Declaration | ||
cmd = [chip_cert_exe, "gen-cd", | ||
"--key", CD_KEY_PATH, | ||
"--cert", CD_PATH, | ||
"--out", output + "_"+ str(vendor_id) + "_"+ str(product_id) + "/CD.der", | ||
"--format-version", "1", | ||
"--vendor-id", hex(vendor_id), | ||
"--product-id", hex(product_id), | ||
"--device-type-id", "0", | ||
"--certificate-id", "FFFFFFFFFFFFFFFFFFF", | ||
"--security-level", "0", | ||
"--security-info", "0", | ||
"--certification-type", "0", | ||
"--version-number", "0xFFFF", | ||
] | ||
subprocess.run(cmd) | ||
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new_certificates = {"PAI_CERT": output + "_"+ str(vendor_id) + "_"+ str(product_id) + "/PAI_cert", | ||
"PAI_KEY": output + "_"+ str(vendor_id) + "_"+ str(product_id)+"/PAI_key", | ||
"DAC_CERT": output + "_"+ str(vendor_id) + "_"+ str(product_id) + "/DAC_cert", | ||
"DAC_KEY": output + "_"+ str(vendor_id)+ "_"+ str(product_id) + "/DAC_key" | ||
} | ||
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log.info("Generating new PAI and DAC certificates using chip-cert...") | ||
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# generate PAI | ||
cmd = [chip_cert_exe, "gen-att-cert", | ||
"-t", "i", | ||
"-c", "device", | ||
"-V", hex(vendor_id), | ||
"-C", PAA_PATH, | ||
"-K", PAA_KEY_PATH, | ||
"-o", new_certificates["PAI_CERT"] + ".pem", | ||
"-O", new_certificates["PAI_KEY"] + ".pem", | ||
"-l", str(10000), | ||
] | ||
subprocess.run(cmd) | ||
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# generate DAC | ||
cmd = [chip_cert_exe, "gen-att-cert", | ||
"-t", "d", | ||
"-c", "device", | ||
"-V", hex(vendor_id), | ||
"-P", hex(product_id), | ||
"-C", new_certificates["PAI_CERT"] + ".pem", | ||
"-K", new_certificates["PAI_KEY"] + ".pem", | ||
"-o", new_certificates["DAC_CERT"] + ".pem", | ||
"-O", new_certificates["DAC_KEY"] + ".pem", | ||
"-l", str(10000), | ||
] | ||
subprocess.run(cmd) | ||
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# convert to .der files | ||
for cert_k, cert_v in new_certificates.items(): | ||
action_type = "convert-cert" if cert_k.find("CERT") != -1 else "convert-key" | ||
log.info(cert_v + ".der") | ||
cmd = [chip_cert_exe, action_type, | ||
cert_v + ".pem", | ||
cert_v + ".der", | ||
"--x509-der", | ||
] | ||
subprocess.run(cmd) | ||
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return attestation_certs(new_certificates["DAC_CERT"] + ".der", | ||
new_certificates["DAC_KEY"] + ".der", | ||
new_certificates["PAI_CERT"] + ".der") | ||
def get_args(): | ||
def any_base_int(s): return int(s, 0) | ||
parser = argparse.ArgumentParser(description="ESP32 Attestation generation tool") | ||
parser.add_argument("-o", "--output", type=str, required=False, | ||
help="Output path to store attestation certificates", default="certs/attestation") | ||
parser.add_argument('--vendor-id', type=any_base_int, help="Vendor id") | ||
parser.add_argument('--product-id', type=any_base_int, help="Product id") | ||
return parser.parse_args() | ||
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def set_up_out_dirs(args): | ||
os.makedirs(args.output + "_" + str(args.vendor_id) + "_" + str(args.product_id), exist_ok=True) | ||
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def main(): | ||
args = get_args() | ||
set_up_out_dirs(args) | ||
certs = gen_test_certs(args.vendor_id, args.product_id, args.output) | ||
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if __name__ == "__main__": | ||
main() | ||
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