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OpenStack Study: key.py**** CubicPower OpenStack Study ****
# Copyright (c) 2013 The Johns Hopkins University/Applied Physics Laboratory # 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. """ Base Key and SymmetricKey Classes This module defines the Key and SymmetricKey classes. The Key class is the base
**** CubicPower OpenStack Study **** class Key(object): """Base class to represent all keys.""" @abc.abstractmethod
**** CubicPower OpenStack Study **** def get_algorithm(self): """Returns the key's algorithm. Returns the key's algorithm. For example, "DSA" indicates that this key is a DSA key and "AES" indicates that this key is an AES key. """ pass @abc.abstractmethod
**** CubicPower OpenStack Study **** def get_format(self): """Returns the encoding format. Returns the key's encoding format or None if this key is not encoded. """ pass @abc.abstractmethod
**** CubicPower OpenStack Study **** def get_encoded(self): """Returns the key in the format specified by its encoding.""" pass
**** CubicPower OpenStack Study **** class SymmetricKey(Key): """This class represents symmetric keys."""
**** CubicPower OpenStack Study **** def __init__(self, alg, key): """Create a new SymmetricKey object. The arguments specify the algorithm for the symmetric encryption and the bytes for the key. """ self.alg = alg self.key = key
**** CubicPower OpenStack Study **** def get_algorithm(self): """Returns the algorithm for symmetric encryption.""" return self.alg
**** CubicPower OpenStack Study **** def get_format(self): """This method returns 'RAW'.""" return "RAW"
**** CubicPower OpenStack Study **** def get_encoded(self): """Returns the key in its encoded format.""" return self.key
**** CubicPower OpenStack Study **** def __eq__(self, other): if isinstance(other, SymmetricKey): return (self.alg == other.alg and self.key == other.key) return NotImplemented
**** CubicPower OpenStack Study **** def __ne__(self, other): result = self.__eq__(other) if result is NotImplemented: return result return not result
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