mirror of
https://github.com/OpenKMIP/PyKMIP.git
synced 2025-11-03 21:16:30 +01:00
dcade2a264
This change updates the PyKMIP object hierarchy's read/write method signatures to support propagation of the KMIP version. The introduction of KMIP 2.0 introduces future KMIP message encodings that break backwards compatibility; to support this, PyKMIP must know what KMIP version is being used when encoding or decoding an object; the KMIP version residing in the client or server alone is now insufficient. Prior versions of KMIP, namely 1.0 - 1.4, have been backwards compatible, obviating the need for the KMIP version at encode/decode time. Going forward, this is no longer true. The PyKMIP client and server have been updated to include the KMIP version when making calls to read/write, as have the associated test cases covering this functionality.
577 lines
20 KiB
Python
577 lines
20 KiB
Python
# Copyright (c) 2017 The Johns Hopkins University/Applied Physics Laboratory
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import six
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from kmip.core import attributes
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from kmip.core import enums
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from kmip.core import objects
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from kmip.core import primitives
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from kmip.core import utils
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class DeriveKeyRequestPayload(primitives.Struct):
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"""
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A request payload for the DeriveKey operation.
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Attributes:
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object_type: The type of the object that should be derived.
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unique_identifiers: A set of unique IDs of managed objects to be used
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with the derivation process.
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derivation_method: The method that should be used to derive the new
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cryptographic object.
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derivation_parameters: A collection of settings relevant for the
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derivation method.
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template_attribute: A collection of attributes that should be set on
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the newly derived cryptographic object.
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"""
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def __init__(self,
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object_type=None,
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unique_identifiers=None,
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derivation_method=None,
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derivation_parameters=None,
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template_attribute=None):
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"""
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Construct a DeriveKey request payload struct.
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Args:
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object_type (ObjectType): An enumeration specifying the type of
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the object to derive. Optional, defaults to None. Required
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for encoding and decoding.
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unique_identifiers (list): A list of strings representing the IDs
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of managed objects (e.g., symmetric keys) to be used for
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derivation. Optional, defaults to None. At least one value is
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required for encoding and decoding.
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derivation_method (DerivationMethod): An enumeration specifying
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the type of derivation function to use (e.g., PBKDF2).
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Optional, defaults to None. Required for encoding and
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decoding.
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derivation_parameters (DerivationParameters): A structure
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containing cryptographic settings relevant for the derivation
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method. Optional, defaults to None. Required for encoding and
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decoding.
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template_attribute (TemplateAttribute): A structure containing a
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set of attributes (e.g., cryptographic algorithm,
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cryptographic length) that should be set on the newly derived
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cryptographic object. Optional, defaults to None. Required
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for encoding and decoding.
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"""
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super(DeriveKeyRequestPayload, self).__init__(
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enums.Tags.REQUEST_PAYLOAD
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)
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self._object_type = None
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self._unique_identifiers = None
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self._derivation_method = None
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self._derivation_parameters = None
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self._template_attribute = None
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self.object_type = object_type
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self.unique_identifiers = unique_identifiers
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self.derivation_method = derivation_method
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self.derivation_parameters = derivation_parameters
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self.template_attribute = template_attribute
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@property
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def object_type(self):
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if self._object_type:
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return self._object_type.value
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else:
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return None
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@object_type.setter
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def object_type(self, value):
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if value is None:
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self._object_type = None
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elif isinstance(value, enums.ObjectType):
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self._object_type = primitives.Enumeration(
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enums.ObjectType,
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value=value,
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tag=enums.Tags.OBJECT_TYPE
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)
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else:
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raise TypeError("object type must be an ObjectType enumeration")
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@property
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def unique_identifiers(self):
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if self._unique_identifiers:
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unique_identifiers = []
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for i in self._unique_identifiers:
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unique_identifiers.append(i.value)
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return unique_identifiers
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else:
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return None
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@unique_identifiers.setter
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def unique_identifiers(self, value):
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if value is None:
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self._unique_identifiers = None
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elif isinstance(value, list):
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unique_identifiers = []
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for i in value:
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if isinstance(i, six.string_types):
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unique_identifiers.append(
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primitives.TextString(
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value=i,
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tag=enums.Tags.UNIQUE_IDENTIFIER
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)
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)
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else:
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raise TypeError(
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"unique identifiers must be a list of strings"
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)
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self._unique_identifiers = unique_identifiers
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else:
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raise TypeError("unique identifiers must be a list of strings")
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@property
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def derivation_method(self):
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if self._derivation_method:
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return self._derivation_method.value
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else:
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return None
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@derivation_method.setter
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def derivation_method(self, value):
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if value is None:
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self._derivation_method = None
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elif isinstance(value, enums.DerivationMethod):
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self._derivation_method = primitives.Enumeration(
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enums.DerivationMethod,
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value=value,
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tag=enums.Tags.DERIVATION_METHOD
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)
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else:
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raise TypeError(
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"derivation method must be a DerivationMethod enumeration"
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)
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@property
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def derivation_parameters(self):
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if self._derivation_parameters:
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return self._derivation_parameters
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else:
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return None
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@derivation_parameters.setter
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def derivation_parameters(self, value):
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if value is None:
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self._derivation_parameters = None
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elif isinstance(value, attributes.DerivationParameters):
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self._derivation_parameters = value
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else:
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raise TypeError(
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"derivation parameters must be a DerivationParameters struct"
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)
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@property
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def template_attribute(self):
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if self._template_attribute:
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return self._template_attribute
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else:
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return None
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@template_attribute.setter
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def template_attribute(self, value):
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if value is None:
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self._template_attribute = None
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elif isinstance(value, objects.TemplateAttribute):
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self._template_attribute = value
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else:
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raise TypeError(
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"template attribute must be a TemplateAttribute struct"
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)
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def read(self, input_stream, kmip_version=enums.KMIPVersion.KMIP_1_0):
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"""
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Read the data encoding the DeriveKey request payload and decode it
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into its constituent parts.
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Args:
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input_stream (stream): A data stream containing encoded object
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data, supporting a read method; usually a BytearrayStream
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object.
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kmip_version (KMIPVersion): An enumeration defining the KMIP
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version with which the object will be decoded. Optional,
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defaults to KMIP 1.0.
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Raises:
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ValueError: Raised if the data attribute is missing from the
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encoded payload.
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"""
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super(DeriveKeyRequestPayload, self).read(
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input_stream,
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kmip_version=kmip_version
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)
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local_stream = utils.BytearrayStream(input_stream.read(self.length))
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if self.is_tag_next(enums.Tags.OBJECT_TYPE, local_stream):
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self._object_type = primitives.Enumeration(
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enums.ObjectType,
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tag=enums.Tags.OBJECT_TYPE
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)
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self._object_type.read(local_stream, kmip_version=kmip_version)
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else:
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raise ValueError(
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"invalid payload missing object type"
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)
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unique_identifiers = []
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while self.is_tag_next(enums.Tags.UNIQUE_IDENTIFIER, local_stream):
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unique_identifier = primitives.TextString(
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tag=enums.Tags.UNIQUE_IDENTIFIER
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)
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unique_identifier.read(local_stream, kmip_version=kmip_version)
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unique_identifiers.append(unique_identifier)
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if not unique_identifiers:
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raise ValueError("invalid payload missing unique identifiers")
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else:
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self._unique_identifiers = unique_identifiers
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if self.is_tag_next(enums.Tags.DERIVATION_METHOD, local_stream):
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self._derivation_method = primitives.Enumeration(
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enums.DerivationMethod,
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tag=enums.Tags.DERIVATION_METHOD
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)
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self._derivation_method.read(
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local_stream,
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kmip_version=kmip_version
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)
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else:
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raise ValueError(
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"invalid payload missing derivation method"
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)
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if self.is_tag_next(enums.Tags.DERIVATION_PARAMETERS, local_stream):
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self._derivation_parameters = attributes.DerivationParameters()
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self._derivation_parameters.read(
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local_stream,
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kmip_version=kmip_version
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)
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else:
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raise ValueError(
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"invalid payload missing derivation parameters"
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)
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if self.is_tag_next(enums.Tags.TEMPLATE_ATTRIBUTE, local_stream):
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self._template_attribute = objects.TemplateAttribute()
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self._template_attribute.read(
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local_stream,
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kmip_version=kmip_version
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)
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else:
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raise ValueError(
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"invalid payload missing template attribute"
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)
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self.is_oversized(local_stream)
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def write(self, output_stream, kmip_version=enums.KMIPVersion.KMIP_1_0):
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"""
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Write the data encoding the DeriveKey request payload to a stream.
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Args:
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output_stream (stream): A data stream in which to encode object
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data, supporting a write method; usually a BytearrayStream
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object.
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kmip_version (KMIPVersion): An enumeration defining the KMIP
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version with which the object will be encoded. Optional,
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defaults to KMIP 1.0.
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Raises:
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ValueError: Raised if the data attribute is not defined.
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"""
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local_stream = utils.BytearrayStream()
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if self._object_type:
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self._object_type.write(local_stream, kmip_version=kmip_version)
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else:
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raise ValueError("invalid payload missing object type")
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if self._unique_identifiers:
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for unique_identifier in self._unique_identifiers:
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unique_identifier.write(
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local_stream,
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kmip_version=kmip_version
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)
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else:
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raise ValueError("invalid payload missing unique identifiers")
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if self._derivation_method:
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self._derivation_method.write(
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local_stream,
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kmip_version=kmip_version
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)
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else:
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raise ValueError("invalid payload missing derivation method")
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if self._derivation_parameters:
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self._derivation_parameters.write(
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local_stream,
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kmip_version=kmip_version
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)
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else:
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raise ValueError("invalid payload missing derivation parameters")
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if self._template_attribute:
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self._template_attribute.write(
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local_stream,
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kmip_version=kmip_version
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)
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else:
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raise ValueError("invalid payload missing template attributes")
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self.length = local_stream.length()
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super(DeriveKeyRequestPayload, self).write(
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output_stream,
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kmip_version=kmip_version
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)
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output_stream.write(local_stream.buffer)
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def __eq__(self, other):
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if isinstance(other, DeriveKeyRequestPayload):
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if self.object_type != other.object_type:
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return False
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elif self.unique_identifiers != other.unique_identifiers:
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return False
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elif self.derivation_method != other.derivation_method:
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return False
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elif self.derivation_parameters != other.derivation_parameters:
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return False
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elif self.template_attribute != other.template_attribute:
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return False
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else:
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return True
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else:
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return NotImplemented
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def __ne__(self, other):
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if isinstance(other, DeriveKeyRequestPayload):
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return not (self == other)
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else:
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return NotImplemented
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def __repr__(self):
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args = ", ".join([
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"object_type={0}".format(self.object_type),
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"unique_identifiers={0}".format(self.unique_identifiers),
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"derivation_method={0}".format(self.derivation_method),
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"derivation_parameters={0}".format(
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repr(self.derivation_parameters)
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),
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"template_attribute={0}".format(repr(self.template_attribute))
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])
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return "DeriveKeyRequestPayload({0})".format(args)
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def __str__(self):
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return str({
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'object_type': self.object_type,
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'unique_identifiers': self.unique_identifiers,
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'derivation_method': self.derivation_method,
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'derivation_parameters': self.derivation_parameters,
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'template_attribute': self.template_attribute
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})
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class DeriveKeyResponsePayload(primitives.Struct):
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"""
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A response payload for the DeriveKey operation.
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Attributes:
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unique_identifier: The unique ID of the newly derived cryptographic
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object.
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template_attribute: A collection of attributes that were implicitly
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set by the server on the newly derived cryptographic object.
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"""
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def __init__(self,
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unique_identifier=None,
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template_attribute=None):
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"""
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Construct a DeriveKey response payload struct.
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Args:
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unique_identifier (string): A string representing the ID of the
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newly derived managed object. Optional, defaults to None. At
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least one value is required for encoding and decoding.
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template_attribute (TemplateAttribute): A structure containing a
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set of attributes (e.g., cryptographic algorithm,
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cryptographic length) implicitly set by the server on the
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newly derived cryptographic object. Optional, defaults to
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None.
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"""
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super(DeriveKeyResponsePayload, self).__init__(
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enums.Tags.RESPONSE_PAYLOAD
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)
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self._unique_identifier = None
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self._template_attribute = None
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self.unique_identifier = unique_identifier
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self.template_attribute = template_attribute
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@property
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def unique_identifier(self):
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if self._unique_identifier:
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return self._unique_identifier.value
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else:
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return None
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@unique_identifier.setter
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def unique_identifier(self, value):
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if value is None:
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self._unique_identifier = None
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elif isinstance(value, six.string_types):
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self._unique_identifier = primitives.TextString(
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value=value,
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tag=enums.Tags.UNIQUE_IDENTIFIER
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)
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else:
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raise TypeError("unique identifier must be a string")
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@property
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def template_attribute(self):
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if self._template_attribute:
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return self._template_attribute
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else:
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return None
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@template_attribute.setter
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def template_attribute(self, value):
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if value is None:
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self._template_attribute = None
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elif isinstance(value, objects.TemplateAttribute):
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self._template_attribute = value
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else:
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raise TypeError(
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"template attribute must be a TemplateAttribute struct"
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)
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def read(self, input_stream, kmip_version=enums.KMIPVersion.KMIP_1_0):
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"""
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Read the data encoding the DeriveKey response payload and decode it
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into its constituent parts.
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Args:
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input_stream (stream): A data stream containing encoded object
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data, supporting a read method; usually a BytearrayStream
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object.
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kmip_version (KMIPVersion): An enumeration defining the KMIP
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version with which the object will be decoded. Optional,
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defaults to KMIP 1.0.
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Raises:
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ValueError: Raised if the data attribute is missing from the
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encoded payload.
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"""
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super(DeriveKeyResponsePayload, self).read(
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input_stream,
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kmip_version=kmip_version
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)
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local_stream = utils.BytearrayStream(input_stream.read(self.length))
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if self.is_tag_next(enums.Tags.UNIQUE_IDENTIFIER, local_stream):
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self._unique_identifier = primitives.TextString(
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tag=enums.Tags.UNIQUE_IDENTIFIER
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)
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self._unique_identifier.read(
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local_stream,
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kmip_version=kmip_version
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)
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else:
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raise ValueError(
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"invalid payload missing unique identifier"
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)
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if self.is_tag_next(enums.Tags.TEMPLATE_ATTRIBUTE, local_stream):
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self._template_attribute = objects.TemplateAttribute()
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self._template_attribute.read(
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local_stream,
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kmip_version=kmip_version
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)
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self.is_oversized(local_stream)
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def write(self, output_stream, kmip_version=enums.KMIPVersion.KMIP_1_0):
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"""
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Write the data encoding the DeriveKey response payload to a stream.
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Args:
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output_stream (stream): A data stream in which to encode object
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data, supporting a write method; usually a BytearrayStream
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object.
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kmip_version (KMIPVersion): An enumeration defining the KMIP
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version with which the object will be encoded. Optional,
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defaults to KMIP 1.0.
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Raises:
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ValueError: Raised if the data attribute is not defined.
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"""
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local_stream = utils.BytearrayStream()
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if self._unique_identifier:
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self._unique_identifier.write(
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local_stream,
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kmip_version=kmip_version
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)
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else:
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raise ValueError(
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"invalid payload missing unique identifier"
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)
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if self._template_attribute:
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self._template_attribute.write(
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local_stream,
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kmip_version=kmip_version
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)
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self.length = local_stream.length()
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super(DeriveKeyResponsePayload, self).write(
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output_stream,
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kmip_version=kmip_version
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)
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output_stream.write(local_stream.buffer)
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def __eq__(self, other):
|
|
if isinstance(other, DeriveKeyResponsePayload):
|
|
if self.unique_identifier != other.unique_identifier:
|
|
return False
|
|
elif self.template_attribute != other.template_attribute:
|
|
return False
|
|
else:
|
|
return True
|
|
else:
|
|
return NotImplemented
|
|
|
|
def __ne__(self, other):
|
|
if isinstance(other, DeriveKeyResponsePayload):
|
|
return not (self == other)
|
|
else:
|
|
return NotImplemented
|
|
|
|
def __repr__(self):
|
|
args = ", ".join([
|
|
"unique_identifier='{0}'".format(self.unique_identifier),
|
|
"template_attribute={0}".format(repr(self.template_attribute))
|
|
])
|
|
return "DeriveKeyResponsePayload({0})".format(args)
|
|
|
|
def __str__(self):
|
|
return str({
|
|
'unique_identifier': self.unique_identifier,
|
|
'template_attribute': self.template_attribute
|
|
})
|