File: activate.py

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# Copyright (c) 2015 Hewlett Packard Development Company, L.P.
# 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.

from kmip.core import attributes
from kmip.core import enums
from kmip.core.utils import BytearrayStream
from kmip.core.messages.payloads import base


class ActivateRequestPayload(base.RequestPayload):
    """
    A request payload for the Activate operation.

    The payload contains a UUID of a cryptographic object that that server
    should activate. See Section 4.19 of the KMIP 1.1 specification for more
    information.

    Attributes:
        unique_identifier: The UUID of a managed cryptographic object
    """
    def __init__(self,
                 unique_identifier=None):
        """
        Construct a ActivateRequestPayload object.
        Args:
            unique_identifier (UniqueIdentifier): The UUID of a managed
                cryptographic object.
        """
        super(ActivateRequestPayload, self).__init__()
        self.unique_identifier = unique_identifier
        self.validate()

    def read(self, istream, kmip_version=enums.KMIPVersion.KMIP_1_0):
        """
        Read the data encoding the ActivateRequestPayload object and decode it
        into its constituent parts.
        Args:
            istream (Stream): A data stream containing encoded object data,
                supporting a read method; usually a BytearrayStream object.
            kmip_version (KMIPVersion): An enumeration defining the KMIP
                version with which the object will be decoded. Optional,
                defaults to KMIP 1.0.
        """
        super(ActivateRequestPayload, self).read(
            istream,
            kmip_version=kmip_version
        )
        tstream = BytearrayStream(istream.read(self.length))

        self.unique_identifier = attributes.UniqueIdentifier()
        self.unique_identifier.read(tstream, kmip_version=kmip_version)

        self.is_oversized(tstream)
        self.validate()

    def write(self, ostream, kmip_version=enums.KMIPVersion.KMIP_1_0):
        """
        Write the data encoding the ActivateRequestPayload object to a stream.
        Args:
            ostream (Stream): A data stream in which to encode object data,
                supporting a write method; usually a BytearrayStream object.
            kmip_version (KMIPVersion): An enumeration defining the KMIP
                version with which the object will be encoded. Optional,
                defaults to KMIP 1.0.
        """
        tstream = BytearrayStream()

        # Write the contents of the request payload
        if self.unique_identifier is not None:
            self.unique_identifier.write(tstream, kmip_version=kmip_version)

        # Write the length and value of the request payload
        self.length = tstream.length()
        super(ActivateRequestPayload, self).write(
            ostream,
            kmip_version=kmip_version
        )
        ostream.write(tstream.buffer)

    def validate(self):
        """
        Error check the attributes of the ActivateRequestPayload object.
        """
        if self.unique_identifier is not None:
            if not isinstance(self.unique_identifier,
                              attributes.UniqueIdentifier):
                msg = "invalid unique identifier"
                raise TypeError(msg)


class ActivateResponsePayload(base.ResponsePayload):
    """
    A response payload for the Activate operation.

    The payload contains the server response to the initial Activate request.
    See Section 4.19 of the KMIP 1.1 specification for more information.

    Attributes:
        unique_identifier: The UUID of a managed cryptographic object.
    """
    def __init__(self,
                 unique_identifier=None):
        """
        Construct a ActivateResponsePayload object.

        Args:
            unique_identifier (UniqueIdentifier): The UUID of a managed
                cryptographic object.
        """
        super(ActivateResponsePayload, self).__init__()
        if unique_identifier is None:
            self.unique_identifier = attributes.UniqueIdentifier()
        else:
            self.unique_identifier = unique_identifier
        self.validate()

    def read(self, istream, kmip_version=enums.KMIPVersion.KMIP_1_0):
        """
        Read the data encoding the ActivateResponsePayload object and decode it
        into its constituent parts.

        Args:
            istream (Stream): A data stream containing encoded object data,
                supporting a read method; usually a BytearrayStream object.
            kmip_version (KMIPVersion): An enumeration defining the KMIP
                version with which the object will be decoded. Optional,
                defaults to KMIP 1.0.
        """
        super(ActivateResponsePayload, self).read(
            istream,
            kmip_version=kmip_version
        )
        tstream = BytearrayStream(istream.read(self.length))

        self.unique_identifier = attributes.UniqueIdentifier()
        self.unique_identifier.read(tstream, kmip_version=kmip_version)

        self.is_oversized(tstream)
        self.validate()

    def write(self, ostream, kmip_version=enums.KMIPVersion.KMIP_1_0):
        """
        Write the data encoding the ActivateResponsePayload object to a stream.

        Args:
            ostream (Stream): A data stream in which to encode object data,
                supporting a write method; usually a BytearrayStream object.
            kmip_version (KMIPVersion): An enumeration defining the KMIP
                version with which the object will be encoded. Optional,
                defaults to KMIP 1.0.
        """
        tstream = BytearrayStream()

        # Write the contents of the response payload
        self.unique_identifier.write(tstream, kmip_version=kmip_version)

        # Write the length and value of the request payload
        self.length = tstream.length()
        super(ActivateResponsePayload, self).write(
            ostream,
            kmip_version=kmip_version
        )
        ostream.write(tstream.buffer)

    def validate(self):
        """
        Error check the attributes of the ActivateRequestPayload object.
        """
        if not isinstance(self.unique_identifier, attributes.UniqueIdentifier):
            msg = "invalid unique identifier"
            raise TypeError(msg)