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# device.py - module for handling device info from pskc files
# coding: utf-8
#
# Copyright (C) 2016-2018 Arthur de Jong
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA
"""Module that handles device information stored in PSKC files."""
def update_attributes(obj, **kwargs):
"""Update object with provided properties."""
for k, v in kwargs.items():
k = k.split('.') if '.' in k else k.split('__')
o = obj
for name in k[:-1]:
o = getattr(o, name)
getattr(o, k[-1]) # raise exception for non-existing properties
setattr(o, k[-1], v)
class Device(object):
"""Representation of a single key from a PSKC file.
Instances of this class provide the following properties:
manufacturer: name of the organisation that made the device
serial: serial number of the device
model: device model description
issue_no: issue number per serial number
device_binding: device (class) identifier for the key to be loaded upon
start_date: key should not be used before this date
expiry_date: key or device may expire after this date
device_userid: user distinguished name associated with the device
crypto_module: id of module to which keys are provisioned within device
"""
def __init__(self, pskc):
self.pskc = pskc
self.manufacturer = None
self.serial = None
self.model = None
self.issue_no = None
self.device_binding = None
self.start_date = None
self.expiry_date = None
self.device_userid = None
self.crypto_module = None
self.keys = []
def add_key(self, **kwargs):
"""Create a new key instance for the device.
The new key is initialised with properties from the provided keyword
arguments if any.
"""
from pskc.key import Key
key = Key(self)
self.keys.append(key)
update_attributes(key, **kwargs)
return key
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