mirror of
https://github.com/OpenKMIP/PyKMIP.git
synced 2025-04-08 19:25:06 +02:00
9738c2ba7f
This change fixes a bug in the ProxyKmipClient, specifically in the register method. The client would create attributes for the object to register, regardless if those attributes were set on the object. This could cause attribute value overwrites, deleting valid default values with empty values. This change adds checks to ensure these attributes are not created with the request if they are not set on the object. The client unit tests have been updated to reflect this change.
530 lines
20 KiB
Python
530 lines
20 KiB
Python
# Copyright (c) 2015 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 logging
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import six
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from kmip.core import enums
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from kmip.core import objects as cobjects
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from kmip.core.factories import attributes
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from kmip.pie import api
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from kmip.pie import exceptions
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from kmip.pie import factory
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from kmip.pie import objects as pobjects
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from kmip.services.kmip_client import KMIPProxy
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class ProxyKmipClient(api.KmipClient):
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"""
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A simplified KMIP client for conducting KMIP operations.
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The ProxyKmipClient is a simpler KMIP client supporting various KMIP
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operations. It wraps the original KMIPProxy, reducing the boilerplate
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needed to deploy PyKMIP in client applications. The underlying proxy
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client is responsible for setting up the underlying socket connection
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and for writing/reading data to/from the socket.
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Like the KMIPProxy, the ProxyKmipClient is not thread-safe.
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"""
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def __init__(self,
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hostname=None,
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port=None,
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cert=None,
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key=None,
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ca=None,
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ssl_version=None,
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username=None,
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password=None,
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config='client'):
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"""
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Construct a ProxyKmipClient.
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Args:
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hostname (string): The host or IP address of a KMIP appliance.
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Optional, defaults to None.
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port (int): The port number used to establish a connection to a
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KMIP appliance. Usually 5696 for KMIP applications. Optional,
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defaults to None.
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cert (string): The path to the client's certificate. Optional,
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defaults to None.
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key (string): The path to the key for the client's certificate.
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Optional, defaults to None.
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ca (string): The path to the CA certificate used to verify the
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server's certificate. Optional, defaults to None.
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ssl_version (string): The name of the ssl version to use for the
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connection. Example: 'PROTOCOL_SSLv23'. Optional, defaults to
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None.
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username (string): The username of the KMIP appliance account to
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use for operations. Optional, defaults to None.
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password (string): The password of the KMIP appliance account to
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use for operations. Optional, defaults to None.
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config (string): The name of a section in the PyKMIP configuration
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file. Use to load a specific set of configuration settings from
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the configuration file, instead of specifying them manually.
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Optional, defaults to the default client section, 'client'.
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"""
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self.logger = logging.getLogger()
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self.attribute_factory = attributes.AttributeFactory()
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self.object_factory = factory.ObjectFactory()
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# TODO (peter-hamilton) Consider adding validation checks for inputs.
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self.proxy = KMIPProxy(
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host=hostname,
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port=port,
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certfile=cert,
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keyfile=key,
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ca_certs=ca,
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ssl_version=ssl_version,
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username=username,
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password=password,
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config=config)
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# TODO (peter-hamilton) Add a multiprocessing lock for synchronization.
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self._is_open = False
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def open(self):
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"""
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Open the client connection.
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Raises:
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ClientConnectionFailure: if the client connection is already open
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Exception: if an error occurs while trying to open the connection
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"""
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if self._is_open:
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raise exceptions.ClientConnectionFailure(
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"client connection already open")
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else:
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try:
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self.proxy.open()
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self._is_open = True
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except Exception as e:
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self.logger.exception("could not open client connection", e)
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raise e
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def close(self):
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"""
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Close the client connection.
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Raises:
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ClientConnectionNotOpen: if the client connection is not open
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Exception: if an error occurs while trying to close the connection
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"""
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if not self._is_open:
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raise exceptions.ClientConnectionNotOpen()
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else:
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try:
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self.proxy.close()
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self._is_open = False
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except Exception as e:
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self.logger.exception("could not close client connection", e)
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raise e
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def create(self, algorithm, length, operation_policy_name=None, name=None):
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"""
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Create a symmetric key on a KMIP appliance.
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Args:
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algorithm (CryptographicAlgorithm): An enumeration defining the
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algorithm to use to generate the symmetric key.
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length (int): The length in bits for the symmetric key.
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operation_policy_name (string): The name of the operation policy
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to use for the new symmetric key. Optional, defaults to None
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name (string): The name to give the key. Optional, defaults to None
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Returns:
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string: The uid of the newly created symmetric key.
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Raises:
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ClientConnectionNotOpen: if the client connection is unusable
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KmipOperationFailure: if the operation result is a failure
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TypeError: if the input arguments are invalid
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"""
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# Check inputs
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if not isinstance(algorithm, enums.CryptographicAlgorithm):
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raise TypeError(
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"algorithm must be a CryptographicAlgorithm enumeration")
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elif not isinstance(length, six.integer_types) or length <= 0:
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raise TypeError("length must be a positive integer")
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# Verify that operations can be given at this time
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if not self._is_open:
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raise exceptions.ClientConnectionNotOpen()
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# Create the template containing the attributes
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common_attributes = self._build_common_attributes(
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operation_policy_name
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)
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key_attributes = self._build_key_attributes(algorithm, length)
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key_attributes.extend(common_attributes)
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if name:
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key_attributes.extend(self._build_name_attribute(name))
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template = cobjects.TemplateAttribute(attributes=key_attributes)
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# Create the symmetric key and handle the results
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result = self.proxy.create(enums.ObjectType.SYMMETRIC_KEY, template)
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status = result.result_status.value
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if status == enums.ResultStatus.SUCCESS:
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uid = result.uuid.value
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return uid
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else:
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reason = result.result_reason.value
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message = result.result_message.value
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raise exceptions.KmipOperationFailure(status, reason, message)
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def create_key_pair(self,
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algorithm,
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length,
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operation_policy_name=None,
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public_name=None,
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private_name=None):
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"""
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Create an asymmetric key pair on a KMIP appliance.
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Args:
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algorithm (CryptographicAlgorithm): An enumeration defining the
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algorithm to use to generate the key pair.
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length (int): The length in bits for the key pair.
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operation_policy_name (string): The name of the operation policy
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to use for the new key pair. Optional, defaults to None.
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public_name (string): The name to give the public key.
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Optional, defaults to None.
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private_name (string): The name to give the public key.
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Optional, defaults to None.
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Returns:
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string: The uid of the newly created public key.
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string: The uid of the newly created private key.
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Raises:
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ClientConnectionNotOpen: if the client connection is unusable
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KmipOperationFailure: if the operation result is a failure
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TypeError: if the input arguments are invalid
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"""
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# Check inputs
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if not isinstance(algorithm, enums.CryptographicAlgorithm):
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raise TypeError(
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"algorithm must be a CryptographicAlgorithm enumeration")
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elif not isinstance(length, six.integer_types) or length <= 0:
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raise TypeError("length must be a positive integer")
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# Verify that operations can be given at this time
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if not self._is_open:
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raise exceptions.ClientConnectionNotOpen()
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# Create the common attributes that are shared
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common_attributes = self._build_common_attributes(
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operation_policy_name
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)
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key_attributes = self._build_key_attributes(algorithm, length)
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key_attributes.extend(common_attributes)
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template = cobjects.CommonTemplateAttribute(attributes=key_attributes)
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# Create public / private specific attributes
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public_template = None
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if public_name:
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name_attr = self._build_name_attribute(name=public_name)
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public_template = cobjects.PublicKeyTemplateAttribute(
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names=name_attr
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)
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private_template = None
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if private_name:
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name_attr = self._build_name_attribute(name=private_name)
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private_template = cobjects.PrivateKeyTemplateAttribute(
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names=name_attr
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)
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# Create the asymmetric key pair and handle the results
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result = self.proxy.create_key_pair(
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common_template_attribute=template,
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private_key_template_attribute=private_template,
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public_key_template_attribute=public_template)
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status = result.result_status.value
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if status == enums.ResultStatus.SUCCESS:
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public_uid = result.public_key_uuid.value
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private_uid = result.private_key_uuid.value
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return public_uid, private_uid
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else:
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reason = result.result_reason.value
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message = result.result_message.value
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raise exceptions.KmipOperationFailure(status, reason, message)
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def register(self, managed_object):
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"""
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Register a managed object with a KMIP appliance.
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Args:
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managed_object (ManagedObject): A managed object to register. An
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instantiatable subclass of ManagedObject from the Pie API.
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Returns:
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string: The uid of the newly registered managed object.
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Raises:
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ClientConnectionNotOpen: if the client connection is unusable
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KmipOperationFailure: if the operation result is a failure
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TypeError: if the input argument is invalid
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"""
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# Check input
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if not isinstance(managed_object, pobjects.ManagedObject):
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raise TypeError("managed object must be a Pie ManagedObject")
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# Verify that operations can be given at this time
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if not self._is_open:
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raise exceptions.ClientConnectionNotOpen()
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# Extract and create attributes
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object_attributes = list()
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if hasattr(managed_object, 'cryptographic_usage_masks'):
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if managed_object.cryptographic_usage_masks is not None:
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mask_attribute = self.attribute_factory.create_attribute(
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enums.AttributeType.CRYPTOGRAPHIC_USAGE_MASK,
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managed_object.cryptographic_usage_masks
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)
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object_attributes.append(mask_attribute)
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if hasattr(managed_object, 'operation_policy_name'):
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if managed_object.operation_policy_name is not None:
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opn_attribute = self.attribute_factory.create_attribute(
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enums.AttributeType.OPERATION_POLICY_NAME,
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managed_object.operation_policy_name
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)
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object_attributes.append(opn_attribute)
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template = cobjects.TemplateAttribute(attributes=object_attributes)
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object_type = managed_object.object_type
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# Register the managed object and handle the results
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secret = self.object_factory.convert(managed_object)
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result = self.proxy.register(object_type, template, secret)
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status = result.result_status.value
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if status == enums.ResultStatus.SUCCESS:
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uid = result.uuid.value
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return uid
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else:
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reason = result.result_reason.value
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message = result.result_message.value
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raise exceptions.KmipOperationFailure(status, reason, message)
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def get(self, uid):
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"""
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Get a managed object from a KMIP appliance.
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Args:
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uid (string): The unique ID of the managed object to retrieve.
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Returns:
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ManagedObject: The retrieved managed object object.
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Raises:
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ClientConnectionNotOpen: if the client connection is unusable
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KmipOperationFailure: if the operation result is a failure
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TypeError: if the input argument is invalid
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"""
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# Check input
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if not isinstance(uid, six.string_types):
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raise TypeError("uid must be a string")
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# Verify that operations can be given at this time
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if not self._is_open:
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raise exceptions.ClientConnectionNotOpen()
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# Get the managed object and handle the results
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result = self.proxy.get(uid)
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status = result.result_status.value
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if status == enums.ResultStatus.SUCCESS:
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managed_object = self.object_factory.convert(result.secret)
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return managed_object
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else:
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reason = result.result_reason.value
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message = result.result_message.value
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raise exceptions.KmipOperationFailure(status, reason, message)
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def get_attributes(self, uid=None, attribute_names=None):
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"""
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Get the attributes associated with a managed object.
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If the uid is not specified, the appliance will use the ID placeholder
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by default.
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If the attribute_names list is not specified, the appliance will
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return all viable attributes for the managed object.
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Args:
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uid (string): The unique ID of the managed object with which the
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retrieved attributes should be associated. Optional, defaults
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to None.
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attribute_names (list): A list of string attribute names
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indicating which attributes should be retrieved. Optional,
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defaults to None.
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"""
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# Check input
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if uid is not None:
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if not isinstance(uid, six.string_types):
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raise TypeError("uid must be a string")
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if attribute_names is not None:
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if not isinstance(attribute_names, list):
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raise TypeError("attribute_names must be a list of strings")
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else:
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for attribute_name in attribute_names:
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if not isinstance(attribute_name, six.string_types):
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raise TypeError(
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"attribute_names must be a list of strings"
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)
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# Verify that operations can be given at this time
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if not self._is_open:
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raise exceptions.ClientConnectionNotOpen()
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# Get the list of attributes for a managed object
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result = self.proxy.get_attributes(uid, attribute_names)
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status = result.result_status.value
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if status == enums.ResultStatus.SUCCESS:
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return result.uuid, result.attributes
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else:
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reason = result.result_reason.value
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message = result.result_message.value
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raise exceptions.KmipOperationFailure(status, reason, message)
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def get_attribute_list(self, uid=None):
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"""
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Get the names of the attributes associated with a managed object.
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If the uid is not specified, the appliance will use the ID placeholder
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by default.
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Args:
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uid (string): The unique ID of the managed object with which the
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retrieved attribute names should be associated. Optional,
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defaults to None.
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"""
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# Check input
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if uid is not None:
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if not isinstance(uid, six.string_types):
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raise TypeError("uid must be a string")
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# Verify that operations can be given at this time
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if not self._is_open:
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raise exceptions.ClientConnectionNotOpen()
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# Get the list of attribute names for a managed object.
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result = self.proxy.get_attribute_list(uid)
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status = result.result_status.value
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if status == enums.ResultStatus.SUCCESS:
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attribute_names = sorted(result.names)
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return attribute_names
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else:
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reason = result.result_reason.value
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message = result.result_message.value
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raise exceptions.KmipOperationFailure(status, reason, message)
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def destroy(self, uid):
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"""
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Destroy a managed object stored by a KMIP appliance.
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Args:
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uid (string): The unique ID of the managed object to destroy.
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Returns:
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None
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Raises:
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ClientConnectionNotOpen: if the client connection is unusable
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KmipOperationFailure: if the operation result is a failure
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TypeError: if the input argument is invalid
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"""
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# Check input
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if not isinstance(uid, six.string_types):
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raise TypeError("uid must be a string")
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# Verify that operations can be given at this time
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if not self._is_open:
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raise exceptions.ClientConnectionNotOpen()
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# Destroy the managed object and handle the results
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result = self.proxy.destroy(uid)
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status = result.result_status.value
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if status == enums.ResultStatus.SUCCESS:
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return
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else:
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reason = result.result_reason.value
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message = result.result_message.value
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raise exceptions.KmipOperationFailure(status, reason, message)
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def _build_key_attributes(self, algorithm, length):
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# Build a list of core key attributes.
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algorithm_attribute = self.attribute_factory.create_attribute(
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enums.AttributeType.CRYPTOGRAPHIC_ALGORITHM,
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algorithm)
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length_attribute = self.attribute_factory.create_attribute(
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enums.AttributeType.CRYPTOGRAPHIC_LENGTH,
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length)
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mask_attribute = self.attribute_factory.create_attribute(
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enums.AttributeType.CRYPTOGRAPHIC_USAGE_MASK,
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[enums.CryptographicUsageMask.ENCRYPT,
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enums.CryptographicUsageMask.DECRYPT])
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return [algorithm_attribute, length_attribute, mask_attribute]
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def _build_common_attributes(self, operation_policy_name=None):
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'''
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Build a list of common attributes that are shared across
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symmetric as well as asymmetric objects
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'''
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common_attributes = []
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if operation_policy_name:
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common_attributes.append(
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self.attribute_factory.create_attribute(
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enums.AttributeType.OPERATION_POLICY_NAME,
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operation_policy_name
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)
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)
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return common_attributes
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def _build_name_attribute(self, name=None):
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'''
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Build a name attribute, returned in a list for ease
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of use in the caller
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'''
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name_list = []
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if name:
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name_list.append(self.attribute_factory.create_attribute(
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enums.AttributeType.NAME,
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name)
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)
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return name_list
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def __enter__(self):
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self.open()
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return self
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def __exit__(self, exc_type, exc_value, traceback):
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self.close()
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