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# Copyright 2019 Google LLC.
#
# 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.
"""Tests for tink.python.registry."""
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from tink.proto import tink_pb2
from tink.python import aead
from tink.python import core
from tink.python import mac
from tink.python.testing import helper
class DummyKeyManager(core.KeyManager):
def __init__(self, type_url, primitive_class=aead.Aead):
self._type_url = type_url
self._primitive_class = primitive_class
def primitive_class(self):
return self._primitive_class
def primitive(self, key_data):
return helper.FakeAead()
def key_type(self):
return self._type_url
def new_key_data(self, key_template):
return tink_pb2.KeyData(type_url=key_template.type_url)
class DummyPrivateKeyManager(core.PrivateKeyManager):
def __init__(self, type_url):
self._type_url = type_url
def primitive_class(self):
return None
def primitive(self, key_data):
return None
def key_type(self):
return self._type_url
def new_key_data(self, key_template):
return None
def public_key_data(self, private_key_data):
return tink_pb2.KeyData(type_url='public_' + private_key_data.type_url)
class DummyMacWrapper(core.PrimitiveWrapper):
def wrap(self, _):
return helper.FakeMac()
def primitive_class(self):
return mac.Mac
class InconsistentWrapper(core.PrimitiveWrapper):
def wrap(self, _):
return helper.FakeAead()
def primitive_class(self):
return mac.Mac
def _mac_set(mac_list):
"""Converts a List of Mac in a PrimitiveSet and sets the last primary."""
mac_set = core.new_primitive_set(mac.Mac)
for i, primitive in enumerate(mac_list):
mac_set.set_primary(
mac_set.add_primitive(
primitive,
helper.fake_key(key_id=i, output_prefix_type=tink_pb2.RAW)))
return mac_set
class RegistryTest(absltest.TestCase):
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def setUp(self):
super(RegistryTest, self).setUp()
self.reg = core.Registry()
self.reg.reset()
def test_key_manager_no_exist(self):
with self.assertRaises(core.TinkError):
self.reg.key_manager('invalid')
def test_key_manager_register(self):
dummy_key_manager = DummyKeyManager('dummy_type_url')
self.reg.register_key_manager(dummy_key_manager)
self.assertEqual(dummy_key_manager, self.reg.key_manager('dummy_type_url'))
def test_key_manager_reset(self):
dummy_key_manager = DummyKeyManager('dummy_type_url')
self.reg.register_key_manager(dummy_key_manager)
self.reg.reset()
with self.assertRaises(core.TinkError):
self.reg.key_manager('dummy_type_url')
def test_register_same_key_manager_twice(self):
self.reg.register_key_manager(DummyKeyManager('dummy_type_url', aead.Aead))
self.reg.register_key_manager(DummyKeyManager('dummy_type_url', aead.Aead))
def test_key_manager_replace_fails(self):
self.reg.register_key_manager(DummyKeyManager('dummy_type_url', aead.Aead))
# Replacing the primitive_class for a type_url not allowed.
with self.assertRaises(core.TinkError):
self.reg.register_key_manager(
DummyKeyManager('dummy_type_url', mac.Mac), new_key_allowed=False)
def test_key_manager_disable_new_key_enable_fails(self):
self.reg.register_key_manager(DummyKeyManager('dummy_type_url'))
# Disable new keys.
self.reg.register_key_manager(
DummyKeyManager('dummy_type_url'), new_key_allowed=False)
# Check new keys can't be enabled again.
with self.assertRaises(core.TinkError):
self.reg.register_key_manager(
DummyKeyManager('dummy_type_url'), new_key_allowed=True)
def test_primitive_ok(self):
self.reg.register_key_manager(DummyKeyManager('dummy_type_url', aead.Aead))
primitive = self.reg.primitive(
tink_pb2.KeyData(type_url='dummy_type_url'), aead.Aead)
self.assertIsInstance(primitive, helper.FakeAead)
def test_primitive_fails_on_wrong_primitive(self):
self.reg.register_key_manager(DummyKeyManager('dummy_type_url', aead.Aead))
with self.assertRaisesRegex(core.TinkError,
'uses primitive Aead, and not Mac'):
self.reg.primitive(tink_pb2.KeyData(type_url='dummy_type_url'), mac.Mac)
def test_primitive_fails_on_subclass(self):
self.reg.register_key_manager(
DummyKeyManager('dummy_type_url', helper.FakeAead))
with self.assertRaisesRegex(core.TinkError,
'uses primitive FakeAead, and not Aead'):
self.reg.primitive(tink_pb2.KeyData(type_url='dummy_type_url'), aead.Aead)
def test_new_key_data_success(self):
self.reg.register_key_manager(DummyKeyManager('dummy_type_url'))
key_template = tink_pb2.KeyTemplate(type_url='dummy_type_url')
key_data = self.reg.new_key_data(key_template)
self.assertEqual(key_data.type_url, 'dummy_type_url')
def test_new_key_data_wrong_type_url(self):
self.reg.register_key_manager(DummyKeyManager('dummy_type_url'))
unknown_key_template = tink_pb2.KeyTemplate(type_url='unknown_type_url')
with self.assertRaisesRegex(core.TinkError,
'No manager for type unknown_type_url'):
self.reg.new_key_data(unknown_key_template)
def test_new_key_data_no_new_key_allowed(self):
self.reg.register_key_manager(
DummyKeyManager('dummy_type_url'), new_key_allowed=False)
key_template = tink_pb2.KeyTemplate(type_url='dummy_type_url')
with self.assertRaisesRegex(core.TinkError,
'does not allow for creation of new keys'):
self.reg.new_key_data(key_template)
def test_public_key_data_success(self):
self.reg.register_key_manager(DummyPrivateKeyManager('dummy_type_url'))
key_data = tink_pb2.KeyData(
type_url='dummy_type_url',
key_material_type=tink_pb2.KeyData.ASYMMETRIC_PRIVATE)
public_key_data = self.reg.public_key_data(key_data)
self.assertEqual(public_key_data.type_url, 'public_dummy_type_url')
def test_public_key_data_fails_for_non_asymmetric_private_key(self):
self.reg.register_key_manager(DummyPrivateKeyManager('dummy_type_url'))
key_data = tink_pb2.KeyData(
type_url='dummy_type_url',
key_material_type=tink_pb2.KeyData.ASYMMETRIC_PUBLIC)
with self.assertRaisesRegex(core.TinkError,
'contains a non-private key'):
self.reg.public_key_data(key_data)
def test_public_key_data_fails_for_non_private_key_manager(self):
self.reg.register_key_manager(DummyKeyManager('dummy_type_url'))
key_data = tink_pb2.KeyData(
type_url='dummy_type_url',
key_material_type=tink_pb2.KeyData.ASYMMETRIC_PRIVATE)
with self.assertRaisesRegex(core.TinkError,
'is not a PrivateKeyManager'):
self.reg.public_key_data(key_data)
def test_wrap_success(self):
self.reg.register_primitive_wrapper(mac.MacWrapper())
mac1 = helper.FakeMac('FakeMac1')
mac2 = helper.FakeMac('FakeMac2')
wrapped_mac = self.reg.wrap(_mac_set([mac1, mac2]))
wrapped_mac.verify_mac(mac1.compute_mac(b'data1'), b'data1')
wrapped_mac.verify_mac(mac2.compute_mac(b'data2'), b'data2')
wrapped_mac.verify_mac(wrapped_mac.compute_mac(b'data'), b'data')
def test_wrap_unknown_primitive(self):
with self.assertRaisesRegex(
core.TinkError,
'No PrimitiveWrapper registered for primitive Mac.'):
self.reg.wrap(_mac_set([helper.FakeMac()]))
def test_primitive_wrapper_reset(self):
self.reg.register_primitive_wrapper(mac.MacWrapper())
self.reg.reset()
with self.assertRaisesRegex(
core.TinkError,
'No PrimitiveWrapper registered for primitive Mac.'):
self.reg.wrap(_mac_set([helper.FakeMac()]))
def test_register_same_primitive_wrapper_twice(self):
self.reg.register_primitive_wrapper(mac.MacWrapper())
self.reg.register_primitive_wrapper(mac.MacWrapper())
def test_register_different_primitive_wrappers_twice_fails(self):
self.reg.register_primitive_wrapper(mac.MacWrapper())
with self.assertRaisesRegex(
core.TinkError,
'A wrapper for primitive Mac has already been added.'):
self.reg.register_primitive_wrapper(DummyMacWrapper())
def test_register_inconsistent_wrapper_fails(self):
with self.assertRaisesRegex(
core.TinkError,
'Wrapper for primitive Mac generates incompatible primitive'):
self.reg.register_primitive_wrapper(InconsistentWrapper())
if __name__ == '__main__':