diff options
Diffstat (limited to 'scripts/rvi_create_certificate_key.sh')
| -rwxr-xr-x | scripts/rvi_create_certificate_key.sh | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/scripts/rvi_create_certificate_key.sh b/scripts/rvi_create_certificate_key.sh new file mode 100755 index 0000000..6e09fdc --- /dev/null +++ b/scripts/rvi_create_certificate_key.sh @@ -0,0 +1,254 @@ +#!/usr/bin/python + +# +# Copyright (C) 2015, Jaguar Land Rover +# +# This program is licensed under the terms and conditions of the +# Mozilla Public License, version 2.0. T full text of the +# Mozilla Public License is at https://www.mozilla.org/MPL/2.0/ +# +# Create a certificate giving the sender the right to invoke and +# + +import getopt +import sys +from Crypto.PublicKey import RSA + +# apt-get install python-dev +# apt-get install libffi-dev +# pip install cryptography +# pip install PyJWT + +import jwt +import time +import json +import base64 +import struct + +def long2intarr(long_int): + _bytes = [] + while long_int: + long_int, r = divmod(long_int, 256) + _bytes.insert(0, r) + return _bytes + +# copied from https://github.com/rohe/pyjwkest +def long_to_base64(n): + bys = long2intarr(n) + data = struct.pack('%sB' % len(bys), *bys) + if not len(data): + data = '\x00' + s = base64.urlsafe_b64encode(data).rstrip(b'=') + return s + +def usage(): + print "Usage:", sys.argv[0], "--id=<id> --invoke='<services>' -register='<services>' \\" + print " --root_key=<file> --start='<date/time>' --stop='<date/time>' \\" + print " --out=<file>" + print + print " --id=<id> System-wide unique certificate ID" + print + print " --invoke='<services>' Right to invoke service. Space separate multiple services." + print + print " --register='<services>' Right to register service. Space separate multiple services." + print " At least one --invoke or --register must be given." + print + print " --root_key=<file> Private root key to sign certificate with" + print " Mandatory" + print + print " --device_key=<file> Public device key to include in certificate" + print " Mandatory" + print + print " --start='<YYYY-MM-DD HH:MM:SS>' Date and time when certificate is activated." + print " Default: current time." + print + print " --stop='<YYYY-MM-DD HH:MM:SS>' Date and time when certificate is deactivated." + print " Default: 365 days from current time" + print + print " --jwt_out=<file> File name to store JWT-encoded certificate in." + print " Default: stdout" + print + print " --cert_out=<file> File name to unencoded JSON certificate in." + print " Default: Do not store certificate" + print + print " --issuer=issuer Name of the issuer. Default: jaguarlandrover.com" + print + print "Root key file is generated by rvi_create_root_key.sh" + print + print "Device key is the '_pub.pem'-suffixed file created by rvi_create_device_key.py" + print + print "Certificate file specified by out should be placed in 'priv/certs'" + print + print + print "Example:" + print "./rvi_create_certificate.py --id=317624d8-2ccf-11e5-993c-7f3b5182c649 \\" + print " --device_key=device_key_pub.pem \\" + print " --start='2015-12-01 00:00:00' \\" + print " --stop='2015-12-31 23:59:59' \\" + print " --root_key=root_key_priv.pem \\" + print " --register='jlr.com/vin/abc/unlock jlr.com/vin/abc/lock' \\" + print " --invoke='jlr.com/backend/report jlr.com/backend/set_state' \\" + print " --jwt_out=lock_cert.jwt \\" + print " --cert_out=lock_cert.json" + sys.exit(255) + +try: + opts, args = getopt.getopt(sys.argv[1:], "", [ 'issuer=', 'invoke=', 'register=', + 'root_key=', 'start=', + 'stop=', 'cert_out=', 'id=', + 'jwt_out=', 'device_key=']) +except getopt.GetoptError as e: + print + print e + print + usage() + +start=int(time.time()) +stop=int(time.time()) + 86400 * 365 + +issuer='jaguarlandrover.com' +invoke=None +register=None +root_key=None +device_key=None +jwt_out_file=None +cert_out_file=None +id_string=None +for o, a in opts: + if o == "--start": + try: + start = int(time.mktime(time.strptime(a, "%Y-%m-%d %H:%M:%S"))) + except: + print + print "Incorrect start time: {}".format(a) + print + usage() + + elif o == '--root_key': + try: + root_key_fname = a + root_key_file = open(root_key_fname, "r") + root_key = RSA.importKey(root_key_file.read()) + root_key_file.close() + except IOError as e: + print "Coould read root cert from {0}: {1}".format(a, e.strerror) + sys.exit(255) + + elif o == '--device_key': + try: + device_key_file = open(a, "r") + device_key = RSA.importKey(device_key_file.read()) + device_key_file.close() + except IOError as e: + print "Coould read root cert from {0}: {1}".format(a, e.strerror) + sys.exit(255) + + elif o == "--stop": + try: + stop = int(time.mktime(time.strptime(a, "%Y-%m-%d %H:%M:%S"))) + except: + print + print "Incorrect stop time: {}".format(a) + print + usage() + + elif o == '--invoke': + invoke=a.split(' ') + + elif o == '--register': + register=a.split(' ') + + elif o == '--id': + id_string=a + + elif o == '--issuer': + issuer=a + + elif o == '--jwt_out': + try: + jwt_out_file = open(a, "w") + except IOError as e: + print "Coould write to JWT file {0}: {1}".format(a, e.strerror) + sys.exit(255) + + elif o == '--cert_out': + try: + cert_out_file = open(a, "w") + except IOError as e: + print "Coould write to certificate file {0}: {1}".format(a, e.strerror) + sys.exit(255) + + else: + print + print "Unknown command line argument: {}".format(o) + print + usage() + +if jwt_out_file == None: + jwt_out_file = sys.stdout + +if not invoke and not register: + print + print "At least one --invoke or --register service must be specified." + print + usage() + +if not root_key: + print + print "No --root_key=<root_key_file.pem> specified" + print + usage() + +if not device_key: + print + print "No --device_key=<device_public_key_file.pem> specified" + print + usage() + +if not id_string: + print + print "No --id=<id_string> specified" + print + usage() + + +# Create a JSON Web Key based off our public device key PEM file + + +cert = { + 'iss': issuer, + 'id': id_string, + 'sources': register, + 'destinations': invoke, + 'create_timestamp': int(time.time()), + 'keys': [{ + "kty": "RSA", + "alg": "RS256", + "use": "sig", + "e": long_to_base64(device_key.e), + "n": long_to_base64(device_key.n) + }], + 'validity': { + 'start': start, + 'stop': stop + } +} + + +encoded = jwt.encode(cert, root_key.exportKey("PEM"), algorithm='RS256') + +# Validate +try: + jwt.decode(encoded, root_key.publickey().exportKey("PEM")) +except: + print "FAILED: Could not verify signed JSON Web Token using public part of" + print " root key {}".format(root_key_fname) + + +jwt_out_file.write(encoded) +jwt_out_file.close() + +if cert_out_file: + cert_out_file.write(json.dumps(cert, sort_keys=True, indent=4, separators=(',', ': ')) + '\n') + cert_out_file.close() + |