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# -------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See License.txt in the project root for
# license information.
# --------------------------------------------------------------------------
import unittest
from base64 import (
b64decode,
)
from json import (
loads,
dumps,
)
from azure.common import (
AzureHttpError,
AzureException,
)
from cryptography.hazmat import backends
from cryptography.hazmat.primitives.ciphers import Cipher
from cryptography.hazmat.primitives.ciphers.algorithms import AES
from cryptography.hazmat.primitives.ciphers.modes import CBC
from cryptography.hazmat.primitives.padding import PKCS7
from azure.storage.common._common_conversion import _decode_base64_to_bytes
from azure.storage.common._constants import __version__
from azure.storage.common._encryption import (
_WrappedContentKey,
_EncryptionAgent,
_EncryptionData,
)
from azure.storage.common._error import (
_ERROR_OBJECT_INVALID,
_ERROR_DECRYPTION_FAILURE,
_ERROR_ENCRYPTION_REQUIRED,
)
from azure.storage.queue._error import (
_ERROR_MESSAGE_NOT_ENCRYPTED,
)
from azure.storage.queue import (
QueueService,
)
from azure.storage.queue.models import QueueMessageFormat
from tests.encryption_test_helper import (
KeyWrapper,
KeyResolver,
RSAKeyWrapper,
)
from tests.testcase import (
StorageTestCase,
record,
TestMode,
)
# ------------------------------------------------------------------------------
TEST_QUEUE_PREFIX = 'encryptionqueue'
# ------------------------------------------------------------------------------
class StorageQueueEncryptionTest(StorageTestCase):
def setUp(self):
super(StorageQueueEncryptionTest, self).setUp()
self.qs = self._create_storage_service(QueueService, self.settings)
self.test_queues = []
def tearDown(self):
if not self.is_playback():
for queue_name in self.test_queues:
try:
self.qs.delete_queue(queue_name)
except:
pass
return super(StorageQueueEncryptionTest, self).tearDown()
# --Helpers-----------------------------------------------------------------
def _get_queue_reference(self, prefix=TEST_QUEUE_PREFIX):
queue_name = self.get_resource_name(prefix)
self.test_queues.append(queue_name)
return queue_name
def _create_queue(self, prefix=TEST_QUEUE_PREFIX):
queue_name = self._get_queue_reference(prefix)
self.qs.create_queue(queue_name)
return queue_name
# --------------------------------------------------------------------------
@record
def test_get_messages_encrypted_kek(self):
# Arrange
self.qs.key_encryption_key = KeyWrapper('key1')
queue_name = self._create_queue()
self.qs.put_message(queue_name, u'encrypted_message_2')
# Act
li = self.qs.get_messages(queue_name)
# Assert
self.assertEqual(li[0].content, u'encrypted_message_2')
@record
def test_get_messages_encrypted_resolver(self):
# Arrange
self.qs.key_encryption_key = KeyWrapper('key1')
queue_name = self._create_queue()
self.qs.put_message(queue_name, u'encrypted_message_2')
key_resolver = KeyResolver()
key_resolver.put_key(self.qs.key_encryption_key)
self.qs.key_resolver_function = key_resolver.resolve_key
self.qs.key_encryption_key = None # Ensure that the resolver is used
# Act
li = self.qs.get_messages(queue_name)
# Assert
self.assertEqual(li[0].content, u'encrypted_message_2')
@record
def test_peek_messages_encrypted_kek(self):
# Arrange
self.qs.key_encryption_key = KeyWrapper('key1')
queue_name = self._create_queue()
self.qs.put_message(queue_name, u'encrypted_message_3')
# Act
li = self.qs.peek_messages(queue_name)
# Assert
self.assertEqual(li[0].content, u'encrypted_message_3')
@record
def test_peek_messages_encrypted_resolver(self):
# Arrange
self.qs.key_encryption_key = KeyWrapper('key1')
queue_name = self._create_queue()
self.qs.put_message(queue_name, u'encrypted_message_4')
key_resolver = KeyResolver()
key_resolver.put_key(self.qs.key_encryption_key)
self.resolver = key_resolver.resolve_key
# Act
li = self.qs.peek_messages(queue_name)
# Assert
self.assertEqual(li[0].content, u'encrypted_message_4')
def test_peek_messages_encrypted_kek_RSA(self):
# We can only generate random RSA keys, so this must be run live or
# the playback test will fail due to a change in kek values.
if TestMode.need_recording_file(self.test_mode):
return
# Arrange
self.qs.key_encryption_key = RSAKeyWrapper('key2')
queue_name = self._create_queue()
self.qs.put_message(queue_name, u'encrypted_message_3')
# Act
li = self.qs.peek_messages(queue_name)
# Assert
self.assertEqual(li[0].content, u'encrypted_message_3')
@record
def test_update_encrypted_message(self):
# Arrange
queue_name = self._create_queue()
self.qs.key_encryption_key = KeyWrapper('key1')
self.qs.put_message(queue_name, u'Update Me')
list_result1 = self.qs.get_messages(queue_name)
# Act
message = self.qs.update_message(queue_name,
list_result1[0].id,
list_result1[0].pop_receipt,
0,
content=u'Updated', )
list_result2 = self.qs.get_messages(queue_name)
# Assert
message = list_result2[0]
self.assertEqual(u'Updated', message.content)
@record
def test_update_encrypted_binary_message(self):
# Arrange
queue_name = self._create_queue()
self.qs.key_encryption_key = KeyWrapper('key1')
self.qs.encode_function = QueueMessageFormat.binary_base64encode
self.qs.decode_function = QueueMessageFormat.binary_base64decode
binary_message = self.get_random_bytes(100)
self.qs.put_message(queue_name, binary_message)
list_result1 = self.qs.get_messages(queue_name)
# Act
binary_message = self.get_random_bytes(100)
self.qs.update_message(queue_name,
list_result1[0].id,
list_result1[0].pop_receipt,
0,
content=binary_message, )
list_result2 = self.qs.get_messages(queue_name)
# Assert
message = list_result2[0]
self.assertEqual(binary_message, message.content)
@record
def test_update_encrypted_raw_text_message(self):
# Arrange
queue_name = self._create_queue()
self.qs.key_encryption_key = KeyWrapper('key1')
self.qs.encode_function = QueueMessageFormat.noencode
self.qs.decode_function = QueueMessageFormat.nodecode
raw_text = u'Update Me'
self.qs.put_message(queue_name, raw_text)
list_result1 = self.qs.get_messages(queue_name)
# Act
raw_text = u'Updated'
self.qs.update_message(queue_name,
list_result1[0].id,
list_result1[0].pop_receipt,
0,
content=raw_text, )
list_result2 = self.qs.get_messages(queue_name)
# Assert
message = list_result2[0]
self.assertEqual(raw_text, message.content)
@record
def test_update_encrypted_json_message(self):
# Arrange
queue_name = self._create_queue()
self.qs.key_encryption_key = KeyWrapper('key1')
self.qs.encode_function = QueueMessageFormat.noencode
self.qs.decode_function = QueueMessageFormat.nodecode
message_dict = {'val1': 1, 'val2': '2'}
json_text = dumps(message_dict)
self.qs.put_message(queue_name, json_text)
list_result1 = self.qs.get_messages(queue_name)
# Act
message_dict['val1'] = 0
message_dict['val2'] = 'updated'
json_text = dumps(message_dict)
self.qs.update_message(queue_name,
list_result1[0].id,
list_result1[0].pop_receipt,
0,
content=json_text, )
list_result2 = self.qs.get_messages(queue_name)
# Assert
message = list_result2[0]
self.assertEqual(message_dict, loads(message.content))
@record
def test_invalid_value_kek_wrap(self):
# Arrange
queue_name = self._create_queue()
self.qs.key_encryption_key = KeyWrapper('key1')
self.qs.key_encryption_key.get_kid = None
try:
self.qs.put_message(queue_name, u'message')
self.fail()
except AttributeError as e:
self.assertEqual(str(e), _ERROR_OBJECT_INVALID.format('key encryption key', 'get_kid'))
self.qs.key_encryption_key = KeyWrapper('key1')
self.qs.key_encryption_key.get_kid = None
with self.assertRaises(AttributeError):
self.qs.put_message(queue_name, u'message')
self.qs.key_encryption_key = KeyWrapper('key1')
self.qs.key_encryption_key.wrap_key = None
with self.assertRaises(AttributeError):
self.qs.put_message(queue_name, u'message')
@record
def test_missing_attribute_kek_wrap(self):
# Arrange
queue_name = self._create_queue()
valid_key = KeyWrapper('key1')
# Act
invalid_key_1 = lambda: None # functions are objects, so this effectively creates an empty object
invalid_key_1.get_key_wrap_algorithm = valid_key.get_key_wrap_algorithm
invalid_key_1.get_kid = valid_key.get_kid
# No attribute wrap_key
self.qs.key_encryption_key = invalid_key_1
with self.assertRaises(AttributeError):
self.qs.put_message(queue_name, u'message')
invalid_key_2 = lambda: None # functions are objects, so this effectively creates an empty object
invalid_key_2.wrap_key = valid_key.wrap_key
invalid_key_2.get_kid = valid_key.get_kid
# No attribute get_key_wrap_algorithm
self.qs.key_encryption_key = invalid_key_2
with self.assertRaises(AttributeError):
self.qs.put_message(queue_name, u'message')
invalid_key_3 = lambda: None # functions are objects, so this effectively creates an empty object
invalid_key_3.get_key_wrap_algorithm = valid_key.get_key_wrap_algorithm
invalid_key_3.wrap_key = valid_key.wrap_key
# No attribute get_kid
self.qs.key_encryption_key = invalid_key_3
with self.assertRaises(AttributeError):
self.qs.put_message(queue_name, u'message')
@record
def test_invalid_value_kek_unwrap(self):
# Arrange
queue_name = self._create_queue()
self.qs.key_encryption_key = KeyWrapper('key1')
self.qs.put_message(queue_name, u'message')
# Act
self.qs.key_encryption_key.unwrap_key = None
with self.assertRaises(AzureException):
self.qs.peek_messages(queue_name)
self.qs.key_encryption_key.get_kid = None
with self.assertRaises(AzureException):
self.qs.peek_messages(queue_name)
@record
def test_missing_attribute_kek_unrwap(self):
# Arrange
queue_name = self._create_queue()
self.qs.key_encryption_key = KeyWrapper('key1')
self.qs.put_message(queue_name, u'message')
# Act
valid_key = KeyWrapper('key1')
invalid_key_1 = lambda: None # functions are objects, so this effectively creates an empty object
invalid_key_1.unwrap_key = valid_key.unwrap_key
# No attribute get_kid
self.qs.key_encryption_key = invalid_key_1
try:
self.qs.peek_messages(queue_name)
self.fail()
except AzureException as e:
self.assertEqual(str(e), _ERROR_DECRYPTION_FAILURE)
invalid_key_2 = lambda: None # functions are objects, so this effectively creates an empty object
invalid_key_2.get_kid = valid_key.get_kid
# No attribute unwrap_key
self.qs.key_encryption_key = invalid_key_2
with self.assertRaises(AzureException):
self.qs.peek_messages(queue_name)
@record
def test_validate_encryption(self):
# Arrange
queue_name = self._create_queue()
kek = KeyWrapper('key1')
self.qs.key_encryption_key = kek
self.qs.put_message(queue_name, u'message')
# Act
self.qs.key_encryption_key = None # Message will not be decrypted
li = self.qs.peek_messages(queue_name)
message = li[0].content
message = loads(message)
encryption_data = message['EncryptionData']
wrapped_content_key = encryption_data['WrappedContentKey']
wrapped_content_key = _WrappedContentKey(wrapped_content_key['Algorithm'],
b64decode(
wrapped_content_key['EncryptedKey'].encode(encoding='utf-8')),
wrapped_content_key['KeyId'])
encryption_agent = encryption_data['EncryptionAgent']
encryption_agent = _EncryptionAgent(encryption_agent['EncryptionAlgorithm'],
encryption_agent['Protocol'])
encryption_data = _EncryptionData(b64decode(encryption_data['ContentEncryptionIV'].encode(encoding='utf-8')),
encryption_agent,
wrapped_content_key,
{'EncryptionLibrary': __version__})
message = message['EncryptedMessageContents']
content_encryption_key = kek.unwrap_key(encryption_data.wrapped_content_key.encrypted_key,
encryption_data.wrapped_content_key.algorithm)
# Create decryption cipher
backend = backends.default_backend()
algorithm = AES(content_encryption_key)
mode = CBC(encryption_data.content_encryption_IV)
cipher = Cipher(algorithm, mode, backend)
# decode and decrypt data
decrypted_data = _decode_base64_to_bytes(message)
decryptor = cipher.decryptor()
decrypted_data = (decryptor.update(decrypted_data) + decryptor.finalize())
# unpad data
unpadder = PKCS7(128).unpadder()
decrypted_data = (unpadder.update(decrypted_data) + unpadder.finalize())
decrypted_data = decrypted_data.decode(encoding='utf-8')
# Assert
self.assertEqual(decrypted_data, u'message')
@record
def test_put_with_strict_mode(self):
# Arrange
queue_name = self._create_queue()
kek = KeyWrapper('key1')
self.qs.key_encryption_key = kek
self.qs.require_encryption = True
self.qs.put_message(queue_name, u'message')
self.qs.key_encryption_key = None
# Assert
try:
self.qs.put_message(queue_name, u'message')
self.fail()
except ValueError as e:
self.assertEqual(str(e), _ERROR_ENCRYPTION_REQUIRED)
@record
def test_get_with_strict_mode(self):
# Arrange
queue_name = self._create_queue()
self.qs.put_message(queue_name, u'message')
self.qs.require_encryption = True
self.qs.key_encryption_key = KeyWrapper('key1')
try:
self.qs.get_messages(queue_name)
except ValueError as e:
self.assertEqual(str(e), _ERROR_MESSAGE_NOT_ENCRYPTED)
@record
def test_encryption_add_encrypted_64k_message(self):
# Arrange
queue_name = self._create_queue()
message = u'a' * 1024 * 64
# Act
self.qs.put_message(queue_name, message)
# Assert
self.qs.key_encryption_key = KeyWrapper('key1')
with self.assertRaises(AzureHttpError):
self.qs.put_message(queue_name, message)
@record
def test_encryption_nonmatching_kid(self):
# Arrange
queue_name = self._create_queue()
self.qs.key_encryption_key = KeyWrapper('key1')
self.qs.put_message(queue_name, u'message')
# Act
self.qs.key_encryption_key.kid = 'Invalid'
# Assert
try:
self.qs.get_messages(queue_name)
self.fail()
except AzureException as e:
self.assertEqual(str(e), _ERROR_DECRYPTION_FAILURE)
# ------------------------------------------------------------------------------
if __name__ == '__main__':
unittest.main()
|
