# Copyright (c) 2015 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.
# Copyright (c) 2015 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.

import binascii
import testtools

from kmip.core import enums
from kmip.pie import objects


class TestPrivateKey(testtools.TestCase):
    """
    Test suite for PrivateKey.
    """
    def setUp(self):
        super(TestPrivateKey, self).setUp()

        # Key values taken from Sections 8.2 and 13.4 of the KMIP 1.1
        # testing documentation.
        self.bytes_1024 = (
            b'\x30\x82\x02\x76\x02\x01\x00\x30\x0D\x06\x09\x2A\x86\x48\x86\xF7'
            b'\x0D\x01\x01\x01\x05\x00\x04\x82\x02\x60\x30\x82\x02\x5C\x02\x01'
            b'\x00\x02\x81\x81\x00\x93\x04\x51\xC9\xEC\xD9\x4F\x5B\xB9\xDA\x17'
            b'\xDD\x09\x38\x1B\xD2\x3B\xE4\x3E\xCA\x8C\x75\x39\xF3\x01\xFC\x8A'
            b'\x8C\xD5\xD5\x27\x4C\x3E\x76\x99\xDB\xDC\x71\x1C\x97\xA7\xAA\x91'
            b'\xE2\xC5\x0A\x82\xBD\x0B\x10\x34\xF0\xDF\x49\x3D\xEC\x16\x36\x24'
            b'\x27\xE5\x8A\xCC\xE7\xF6\xCE\x0F\x9B\xCC\x61\x7B\xBD\x8C\x90\xD0'
            b'\x09\x4A\x27\x03\xBA\x0D\x09\xEB\x19\xD1\x00\x5F\x2F\xB2\x65\x52'
            b'\x6A\xAC\x75\xAF\x32\xF8\xBC\x78\x2C\xDE\xD2\xA5\x7F\x81\x1E\x03'
            b'\xEA\xF6\x7A\x94\x4D\xE5\xE7\x84\x13\xDC\xA8\xF2\x32\xD0\x74\xE6'
            b'\xDC\xEA\x4C\xEC\x9F\x02\x03\x01\x00\x01\x02\x81\x80\x0B\x6A\x7D'
            b'\x73\x61\x99\xEA\x48\xA4\x20\xE4\x53\x7C\xA0\xC7\xC0\x46\x78\x4D'
            b'\xCB\xEA\xA6\x3B\xAE\xBC\x0B\xC1\x32\x78\x74\x49\xCD\xE8\xD7\xCA'
            b'\xD0\xC0\xC8\x63\xC0\xFE\xFB\x06\xC3\x06\x2B\xEF\xC5\x00\x33\xEC'
            b'\xF8\x7B\x4E\x33\xA9\xBE\x7B\xCB\xC8\xF1\x51\x1A\xE2\x15\xE8\x0D'
            b'\xEB\x5D\x8A\xF2\xBD\x31\x31\x9D\x78\x21\x19\x66\x40\x93\x5A\x0C'
            b'\xD6\x7C\x94\x59\x95\x79\xF2\x10\x0D\x65\xE0\x38\x83\x1F\xDA\xFB'
            b'\x0D\xBE\x2B\xBD\xAC\x00\xA6\x96\xE6\x7E\x75\x63\x50\xE1\xC9\x9A'
            b'\xCE\x11\xA3\x6D\xAB\xAC\x3E\xD3\xE7\x30\x96\x00\x59\x02\x41\x00'
            b'\xDD\xF6\x72\xFB\xCC\x5B\xDA\x3D\x73\xAF\xFC\x4E\x79\x1E\x0C\x03'
            b'\x39\x02\x24\x40\x5D\x69\xCC\xAA\xBC\x74\x9F\xAA\x0D\xCD\x4C\x25'
            b'\x83\xC7\x1D\xDE\x89\x41\xA7\xB9\xAA\x03\x0F\x52\xEF\x14\x51\x46'
            b'\x6C\x07\x4D\x4D\x33\x8F\xE6\x77\x89\x2A\xCD\x9E\x10\xFD\x35\xBD'
            b'\x02\x41\x00\xA9\x8F\xBC\x3E\xD6\xB4\xC6\xF8\x60\xF9\x71\x65\xAC'
            b'\x2F\x7B\xB6\xF2\xE2\xCB\x19\x2A\x9A\xBD\x49\x79\x5B\xE5\xBC\xF3'
            b'\x7D\x8E\xE6\x9A\x6E\x16\x9C\x24\xE5\xC3\x2E\x4E\x7F\xA3\x32\x65'
            b'\x46\x14\x07\xF9\x52\xBA\x49\xE2\x04\x81\x8A\x2F\x78\x5F\x11\x3F'
            b'\x92\x2B\x8B\x02\x40\x25\x3F\x94\x70\x39\x0D\x39\x04\x93\x03\x77'
            b'\x7D\xDB\xC9\x75\x0E\x9D\x64\x84\x9C\xE0\x90\x3E\xAE\x70\x4D\xC9'
            b'\xF5\x89\xB7\x68\x0D\xEB\x9D\x60\x9F\xD5\xBC\xD4\xDE\xCD\x6F\x12'
            b'\x05\x42\xE5\xCF\xF5\xD7\x6F\x2A\x43\xC8\x61\x5F\xB5\xB3\xA9\x21'
            b'\x34\x63\x79\x7A\xA9\x02\x41\x00\xA1\xDD\xF0\x23\xC0\xCD\x94\xC0'
            b'\x19\xBB\x26\xD0\x9B\x9E\x3C\xA8\xFA\x97\x1C\xB1\x6A\xA5\x8B\x9B'
            b'\xAF\x79\xD6\x08\x1A\x1D\xBB\xA4\x52\xBA\x53\x65\x3E\x28\x04\xBA'
            b'\x98\xFF\x69\xE8\xBB\x1B\x3A\x16\x1E\xA2\x25\xEA\x50\x14\x63\x21'
            b'\x6A\x8D\xAB\x9B\x88\xA7\x5E\x5F\x02\x40\x61\x78\x64\x6E\x11\x2C'
            b'\xF7\x9D\x92\x1A\x8A\x84\x3F\x17\xF6\xE7\xFF\x97\x4F\x68\x81\x22'
            b'\x36\x5B\xF6\x69\x0C\xDF\xC9\x96\xE1\x89\x09\x52\xEB\x38\x20\xDD'
            b'\x18\x90\xEC\x1C\x86\x19\xE8\x7A\x2B\xD3\x8F\x9D\x03\xB3\x7F\xAC'
            b'\x74\x2E\xFB\x74\x8C\x78\x85\x94\x2C\x39')
        self.bytes_2048 = (
            b'\x30\x82\x04\xA5\x02\x01\x00\x02\x82\x01\x01\x00\xAB\x7F\x16\x1C'
            b'\x00\x42\x49\x6C\xCD\x6C\x6D\x4D\xAD\xB9\x19\x97\x34\x35\x35\x77'
            b'\x76\x00\x3A\xCF\x54\xB7\xAF\x1E\x44\x0A\xFB\x80\xB6\x4A\x87\x55'
            b'\xF8\x00\x2C\xFE\xBA\x6B\x18\x45\x40\xA2\xD6\x60\x86\xD7\x46\x48'
            b'\x34\x6D\x75\xB8\xD7\x18\x12\xB2\x05\x38\x7C\x0F\x65\x83\xBC\x4D'
            b'\x7D\xC7\xEC\x11\x4F\x3B\x17\x6B\x79\x57\xC4\x22\xE7\xD0\x3F\xC6'
            b'\x26\x7F\xA2\xA6\xF8\x9B\x9B\xEE\x9E\x60\xA1\xD7\xC2\xD8\x33\xE5'
            b'\xA5\xF4\xBB\x0B\x14\x34\xF4\xE7\x95\xA4\x11\x00\xF8\xAA\x21\x49'
            b'\x00\xDF\x8B\x65\x08\x9F\x98\x13\x5B\x1C\x67\xB7\x01\x67\x5A\xBD'
            b'\xBC\x7D\x57\x21\xAA\xC9\xD1\x4A\x7F\x08\x1F\xCE\xC8\x0B\x64\xE8'
            b'\xA0\xEC\xC8\x29\x53\x53\xC7\x95\x32\x8A\xBF\x70\xE1\xB4\x2E\x7B'
            b'\xB8\xB7\xF4\xE8\xAC\x8C\x81\x0C\xDB\x66\xE3\xD2\x11\x26\xEB\xA8'
            b'\xDA\x7D\x0C\xA3\x41\x42\xCB\x76\xF9\x1F\x01\x3D\xA8\x09\xE9\xC1'
            b'\xB7\xAE\x64\xC5\x41\x30\xFB\xC2\x1D\x80\xE9\xC2\xCB\x06\xC5\xC8'
            b'\xD7\xCC\xE8\x94\x6A\x9A\xC9\x9B\x1C\x28\x15\xC3\x61\x2A\x29\xA8'
            b'\x2D\x73\xA1\xF9\x93\x74\xFE\x30\xE5\x49\x51\x66\x2A\x6E\xDA\x29'
            b'\xC6\xFC\x41\x13\x35\xD5\xDC\x74\x26\xB0\xF6\x05\x02\x03\x01\x00'
            b'\x01\x02\x82\x01\x00\x3B\x12\x45\x5D\x53\xC1\x81\x65\x16\xC5\x18'
            b'\x49\x3F\x63\x98\xAA\xFA\x72\xB1\x7D\xFA\x89\x4D\xB8\x88\xA7\xD4'
            b'\x8C\x0A\x47\xF6\x25\x79\xA4\xE6\x44\xF8\x6D\xA7\x11\xFE\xC8\x50'
            b'\xCD\xD9\xDB\xBD\x17\xF6\x9A\x44\x3D\x2E\xC1\xDD\x60\xD3\xC6\x18'
            b'\xFA\x74\xCD\xE5\xFD\xAF\xAB\xD6\xBA\xA2\x6E\xB0\xA3\xAD\xB4\xDE'
            b'\xF6\x48\x0F\xB1\x21\x8C\xD3\xB0\x83\xE2\x52\xE8\x85\xB6\xF0\x72'
            b'\x9F\x98\xB2\x14\x4D\x2B\x72\x29\x3E\x1B\x11\xD7\x33\x93\xBC\x41'
            b'\xF7\x5B\x15\xEE\x3D\x75\x69\xB4\x99\x5E\xD1\xA1\x44\x25\xDA\x43'
            b'\x19\xB7\xB2\x6B\x0E\x8F\xEF\x17\xC3\x75\x42\xAE\x5C\x6D\x58\x49'
            b'\xF8\x72\x09\x56\x7F\x39\x25\xA4\x7B\x01\x6D\x56\x48\x59\x71\x7B'
            b'\xC5\x7F\xCB\x45\x22\xD0\xAA\x49\xCE\x81\x6E\x5B\xE7\xB3\x08\x81'
            b'\x93\x23\x6E\xC9\xEF\xFF\x14\x08\x58\x04\x5B\x73\xC5\xD7\x9B\xAF'
            b'\x38\xF7\xC6\x7F\x04\xC5\xDC\xF0\xE3\x80\x6A\xD9\x82\xD1\x25\x90'
            b'\x58\xC3\x47\x3E\x84\x71\x79\xA8\x78\xF2\xC6\xB3\xBD\x96\x8F\xB9'
            b'\x9E\xA4\x6E\x91\x85\x89\x2F\x36\x76\xE7\x89\x65\xC2\xAE\xD4\x87'
            b'\x7B\xA3\x91\x7D\xF0\x7C\x5E\x92\x74\x74\xF1\x9E\x76\x4B\xA6\x1D'
            b'\xC3\x8D\x63\xBF\x29\x02\x81\x81\x00\xD5\xC6\x9C\x8C\x3C\xDC\x24'
            b'\x64\x74\x4A\x79\x37\x13\xDA\xFB\x9F\x1D\xBC\x79\x9F\xF9\x64\x23'
            b'\xFE\xCD\x3C\xBA\x79\x42\x86\xBC\xE9\x20\xF4\xB5\xC1\x83\xF9\x9E'
            b'\xE9\x02\x8D\xB6\x21\x2C\x62\x77\xC4\xC8\x29\x7F\xCF\xBC\xE7\xF7'
            b'\xC2\x4C\xA4\xC5\x1F\xC7\x18\x2F\xB8\xF4\x01\x9F\xB1\xD5\x65\x96'
            b'\x74\xC5\xCB\xE6\xD5\xFA\x99\x20\x51\x34\x17\x60\xCD\x00\x73\x57'
            b'\x29\xA0\x70\xA9\xE5\x4D\x34\x2B\xEB\xA8\xEF\x47\xEE\x82\xD3\xA0'
            b'\x1B\x04\xCE\xC4\xA0\x0D\x4D\xDB\x41\xE3\x51\x16\xFC\x22\x1E\x85'
            b'\x4B\x43\xA6\x96\xC0\xE6\x41\x9B\x1B\x02\x81\x81\x00\xCD\x5E\xA7'
            b'\x70\x27\x89\x06\x4B\x67\x35\x40\xCB\xFF\x09\x35\x6A\xD8\x0B\xC3'
            b'\xD5\x92\x81\x2E\xBA\x47\x61\x0B\x9F\xAC\x6A\xEC\xEF\xE2\x2A\xCA'
            b'\xE4\x38\x45\x9C\xDA\x74\xE5\x96\x53\xD8\x8C\x04\x18\x9D\x34\x39'
            b'\x9B\xF5\xB1\x4B\x92\x0E\x34\xEF\x38\xA7\xD0\x9F\xE6\x95\x93\x39'
            b'\x6E\x8F\xE7\x35\xE6\xF0\xA6\xAE\x49\x90\x40\x10\x41\xD8\xA4\x06'
            b'\xB6\xFD\x86\xA1\x16\x1E\x45\xF9\x5A\x3E\xAA\x5C\x10\x12\xE6\x66'
            b'\x2E\x44\xF1\x5F\x33\x5A\xC9\x71\xE1\x76\x6B\x2B\xB9\xC9\x85\x10'
            b'\x99\x74\x14\x1B\x44\xD3\x7E\x1E\x31\x98\x20\xA5\x5F\x02\x81\x81'
            b'\x00\xB2\x87\x12\x37\xBF\x9F\xAD\x38\xC3\x31\x6A\xB7\x87\x7A\x6A'
            b'\x86\x80\x63\xE5\x42\xA7\x18\x6D\x43\x1E\x8D\x27\xC1\x9A\xC0\x41'
            b'\x45\x84\x03\x39\x42\xE9\xFF\x6E\x29\x73\xBB\x7B\x2D\x8B\x0E\x94'
            b'\xAD\x1E\xE8\x21\x58\x10\x8F\xBC\x86\x64\x51\x7A\x5A\x46\x7F\xB9'
            b'\x63\x01\x4B\xD5\xDC\xC2\xB4\xFB\x08\x7C\x23\x03\x9D\x11\x92\x0D'
            b'\xBE\x22\xFD\x9F\x16\xB4\xD8\x9E\x23\x22\x5C\xD4\x55\xAD\xBA\xF3'
            b'\x2E\xF4\x3F\x18\x58\x64\xA3\x6D\x63\x03\x09\xD6\x85\x3F\x77\x14'
            b'\xB3\x9A\xAE\x1E\xBE\xE3\x93\x8F\x87\xC2\x70\x7E\x17\x8C\x73\x9F'
            b'\x9F\x02\x81\x81\x00\x96\x90\xBE\xD1\x4B\x2A\xFA\xA2\x6D\x98\x6D'
            b'\x59\x22\x31\xEE\x27\xD7\x1D\x49\x06\x5B\xD2\xBA\x1F\x78\x15\x7E'
            b'\x20\x22\x98\x81\xFD\x9D\x23\x22\x7D\x0F\x84\x79\xEA\xEF\xA9\x22'
            b'\xFD\x75\xD5\xB1\x6B\x1A\x56\x1F\xA6\x68\x0B\x04\x0C\xA0\xBD\xCE'
            b'\x65\x0B\x23\xB9\x17\xA4\xB1\xBB\x79\x83\xA7\x4F\xAD\x70\xE1\xC3'
            b'\x05\xCB\xEC\x2B\xFF\x1A\x85\xA7\x26\xA1\xD9\x02\x60\xE4\xF1\x08'
            b'\x4F\x51\x82\x34\xDC\xD3\xFE\x77\x0B\x95\x20\x21\x5B\xD5\x43\xBB'
            b'\x6A\x41\x17\x71\x87\x54\x67\x6A\x34\x17\x16\x66\xA7\x9F\x26\xE7'
            b'\x9C\x14\x9C\x5A\xA1\x02\x81\x81\x00\xA0\xC9\x85\xA0\xA0\xA7\x91'
            b'\xA6\x59\xF9\x97\x31\x13\x4C\x44\xF3\x7B\x2E\x52\x0A\x2C\xEA\x35'
            b'\x80\x0A\xD2\x72\x41\xED\x36\x0D\xFD\xE6\xE8\xCA\x61\x4F\x12\x04'
            b'\x7F\xD0\x8B\x76\xAC\x4D\x13\xC0\x56\xA0\x69\x9E\x2F\x98\xA1\xCA'
            b'\xC9\x10\x11\x29\x4D\x71\x20\x8F\x4A\xBA\xB3\x3B\xA8\x7A\xA0\x51'
            b'\x7F\x41\x5B\xAC\xA8\x8D\x6B\xAC\x00\x60\x88\xFA\x60\x1D\x34\x94'
            b'\x17\xE1\xF0\xC9\xB2\x3A\xFF\xA4\xD4\x96\x61\x8D\xBC\x02\x49\x86'
            b'\xED\x69\x0B\xBB\x7B\x02\x57\x68\xFF\x9D\xF8\xAC\x15\x41\x6F\x48'
            b'\x9F\x81\x29\xC3\x23\x41\xA8\xB4\x4F')

    def tearDown(self):
        super(TestPrivateKey, self).tearDown()

    def test_init(self):
        """
        Test that a PrivateKey object can be instantiated.
        """
        key = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 1024, self.bytes_1024,
            enums.KeyFormatType.PKCS_8)

        self.assertEqual(
            key.cryptographic_algorithm, enums.CryptographicAlgorithm.RSA)
        self.assertEqual(key.cryptographic_length, 1024)
        self.assertEqual(key.value, self.bytes_1024)
        self.assertEqual(key.key_format_type, enums.KeyFormatType.PKCS_8)
        self.assertEqual(key.cryptographic_usage_masks, list())
        self.assertEqual(key.names, ['Private Key'])

    def test_init_with_args(self):
        """
        Test that a PrivateKey object can be instantiated with all arguments.
        """
        key = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA,
            1024,
            self.bytes_1024,
            enums.KeyFormatType.PKCS_8,
            masks=[enums.CryptographicUsageMask.ENCRYPT,
                   enums.CryptographicUsageMask.DECRYPT],
            name='Test Private Key')

        self.assertEqual(key.cryptographic_algorithm,
                         enums.CryptographicAlgorithm.RSA)
        self.assertEqual(key.cryptographic_length, 1024)
        self.assertEqual(key.value, self.bytes_1024)
        self.assertEqual(key.key_format_type, enums.KeyFormatType.PKCS_8)
        self.assertEqual(key.cryptographic_usage_masks,
                         [enums.CryptographicUsageMask.ENCRYPT,
                          enums.CryptographicUsageMask.DECRYPT])
        self.assertEqual(key.names, ['Test Private Key'])

    def test_get_object_type(self):
        """
        Test that the object type can be retrieved from the PrivateKey.
        """
        expected = enums.ObjectType.PRIVATE_KEY
        key = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 1024, self.bytes_1024,
            enums.KeyFormatType.PKCS_8)
        observed = key.object_type
        self.assertEqual(expected, observed)

    def test_validate_on_invalid_algorithm(self):
        """
        Test that a TypeError is raised when an invalid algorithm value is
        used to construct a PrivateKey.
        """
        args = ('invalid', 1024, self.bytes_1024, enums.KeyFormatType.PKCS_8)
        self.assertRaises(TypeError, objects.PrivateKey, *args)

    def test_validate_on_invalid_length(self):
        """
        Test that a TypeError is raised when an invalid length value is used
        to construct a PrivateKey.
        """
        args = (enums.CryptographicAlgorithm.RSA, 'invalid', self.bytes_1024,
                enums.KeyFormatType.PKCS_8)
        self.assertRaises(TypeError, objects.PrivateKey, *args)

    def test_validate_on_invalid_value(self):
        """
        Test that a TypeError is raised when an invalid value is used to
        construct a PrivateKey.
        """
        args = (enums.CryptographicAlgorithm.RSA, 1024, 0,
                enums.KeyFormatType.PKCS_8)
        self.assertRaises(TypeError, objects.PrivateKey, *args)

    def test_validate_on_invalid_format_type(self):
        """
        Test that a TypeError is raised when an invalid value is used to
        construct a PrivateKey.
        """
        args = (enums.CryptographicAlgorithm.RSA, 1024, self.bytes_1024,
                'invalid')
        self.assertRaises(TypeError, objects.PrivateKey, *args)

    def test_validate_on_invalid_format_type_value(self):
        """
        Test that a ValueError is raised when an invalid format type is used to
        construct a PrivateKey.
        """
        args = (enums.CryptographicAlgorithm.RSA, 1024, self.bytes_1024,
                enums.KeyFormatType.OPAQUE)
        self.assertRaises(ValueError, objects.PrivateKey, *args)

    def test_validate_on_invalid_masks(self):
        """
        Test that a TypeError is raised when an invalid masks value is used to
        construct a PrivateKey.
        """
        args = (enums.CryptographicAlgorithm.RSA, 1024, self.bytes_1024,
                enums.KeyFormatType.PKCS_8)
        kwargs = {'masks': 'invalid'}
        self.assertRaises(TypeError, objects.PrivateKey, *args, **kwargs)

    def test_validate_on_invalid_mask(self):
        """
        Test that a TypeError is raised when an invalid mask value is used to
        construct a PrivateKey.
        """
        args = (enums.CryptographicAlgorithm.RSA, 1024, self.bytes_1024,
                enums.KeyFormatType.PKCS_8)
        kwargs = {'masks': ['invalid']}
        self.assertRaises(TypeError, objects.PrivateKey, *args, **kwargs)

    def test_validate_on_invalid_name(self):
        """
        Test that a TypeError is raised when an invalid name value is used to
        construct a PrivateKey.
        """
        args = (enums.CryptographicAlgorithm.RSA, 1024, self.bytes_1024,
                enums.KeyFormatType.PKCS_8)
        kwargs = {'name': 0}
        self.assertRaises(TypeError, objects.PrivateKey, *args, **kwargs)

    def test_repr(self):
        """
        Test that repr can be applied to a PrivateKey.
        """
        key = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 1024, self.bytes_1024,
            enums.KeyFormatType.PKCS_8)
        args = "algorithm={0}, length={1}, value={2}, format_type={3}".format(
            enums.CryptographicAlgorithm.RSA, 1024,
            binascii.hexlify(self.bytes_1024), enums.KeyFormatType.PKCS_8)
        expected = "PrivateKey({0})".format(args)
        observed = repr(key)
        self.assertEqual(expected, observed)

    def test_str(self):
        """
        Test that str can be applied to a PrivateKey.
        """
        key = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 1024, self.bytes_1024,
            enums.KeyFormatType.PKCS_8)
        expected = str(binascii.hexlify(self.bytes_1024))
        observed = str(key)
        self.assertEqual(expected, observed)

    def test_equal_on_equal(self):
        """
        Test that the equality operator returns True when comparing two
        PrivateKey objects with the same data.
        """
        a = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 1024, self.bytes_1024,
            enums.KeyFormatType.PKCS_8)
        b = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 1024, self.bytes_1024,
            enums.KeyFormatType.PKCS_8)
        self.assertTrue(a == b)
        self.assertTrue(b == a)

    def test_equal_on_not_equal_algorithm(self):
        """
        Test that the equality operator returns False when comparing two
        PrivateKey objects with different data.
        """
        a = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 1024, self.bytes_1024,
            enums.KeyFormatType.PKCS_8)
        b = objects.PrivateKey(
            enums.CryptographicAlgorithm.AES, 1024, self.bytes_1024,
            enums.KeyFormatType.PKCS_8)
        self.assertFalse(a == b)
        self.assertFalse(b == a)

    def test_equal_on_not_equal_length(self):
        """
        Test that the equality operator returns False when comparing two
        PrivateKey objects with different data.
        """
        a = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 1024, self.bytes_1024,
            enums.KeyFormatType.PKCS_8)
        b = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 2048, self.bytes_1024,
            enums.KeyFormatType.PKCS_8)
        self.assertFalse(a == b)
        self.assertFalse(b == a)

    def test_equal_on_not_equal_value(self):
        """
        Test that the equality operator returns False when comparing two
        PrivateKey objects with different data.
        """
        a = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 1024, self.bytes_1024,
            enums.KeyFormatType.PKCS_8)
        b = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 1024, self.bytes_2048,
            enums.KeyFormatType.PKCS_8)
        self.assertFalse(a == b)
        self.assertFalse(b == a)

    def test_equal_on_not_equal_format_type(self):
        """
        Test that the equality operator returns False when comparing two
        PrivateKey objects with different data.
        """
        a = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 1024, self.bytes_1024,
            enums.KeyFormatType.PKCS_8)
        b = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 1024, self.bytes_1024,
            enums.KeyFormatType.PKCS_1)
        self.assertFalse(a == b)
        self.assertFalse(b == a)

    def test_equal_on_type_mismatch(self):
        """
        Test that the equality operator returns False when comparing a
        PrivateKey object to a non-PrivateKey object.
        """
        a = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 1024, self.bytes_1024,
            enums.KeyFormatType.PKCS_8)
        b = "invalid"
        self.assertFalse(a == b)
        self.assertFalse(b == a)

    def test_not_equal_on_equal(self):
        """
        Test that the inequality operator returns False when comparing
        two PrivateKey objects with the same internal data.
        """
        a = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 2048, self.bytes_2048,
            enums.KeyFormatType.PKCS_1)
        b = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 2048, self.bytes_2048,
            enums.KeyFormatType.PKCS_1)
        self.assertFalse(a != b)
        self.assertFalse(b != a)

    def test_not_equal_on_not_equal_algorithm(self):
        """
        Test that the equality operator returns True when comparing two
        PrivateKey objects with different data.
        """
        a = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 2048, self.bytes_2048,
            enums.KeyFormatType.PKCS_1)
        b = objects.PrivateKey(
            enums.CryptographicAlgorithm.AES, 2048, self.bytes_2048,
            enums.KeyFormatType.PKCS_1)
        self.assertTrue(a != b)
        self.assertTrue(b != a)

    def test_not_equal_on_not_equal_length(self):
        """
        Test that the equality operator returns True when comparing two
        PrivateKey objects with different data.
        """
        a = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 2048, self.bytes_2048,
            enums.KeyFormatType.PKCS_8)
        b = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 1024, self.bytes_1024,
            enums.KeyFormatType.PKCS_8)
        self.assertTrue(a != b)
        self.assertTrue(b != a)

    def test_not_equal_on_not_equal_value(self):
        """
        Test that the equality operator returns True when comparing two
        PrivateKey objects with different data.
        """
        a = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 2048, self.bytes_2048,
            enums.KeyFormatType.PKCS_8)
        b = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 2048, self.bytes_1024,
            enums.KeyFormatType.PKCS_8)
        self.assertTrue(a != b)
        self.assertTrue(b != a)

    def test_not_equal_on_not_equal_format_type(self):
        """
        Test that the equality operator returns True when comparing two
        PrivateKey objects with different data.
        """
        a = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 2048, self.bytes_2048,
            enums.KeyFormatType.PKCS_8)
        b = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 2048, self.bytes_2048,
            enums.KeyFormatType.PKCS_1)
        self.assertTrue(a != b)
        self.assertTrue(b != a)

    def test_not_equal_on_type_mismatch(self):
        """
        Test that the equality operator returns True when comparing a
        PrivateKey object to a non-PrivateKey object.
        """
        a = objects.PrivateKey(
            enums.CryptographicAlgorithm.RSA, 2048, self.bytes_2048,
            enums.KeyFormatType.PKCS_1)
        b = "invalid"
        self.assertTrue(a != b)
        self.assertTrue(b != a)