def test_keyset_info(self):
keyset = tink_pb2.Keyset(primary_key_id=2)
keyset.key.extend([
helper.fake_key(value=b'v1',
type_url='t1',
key_id=1,
status=tink_pb2.ENABLED,
output_prefix_type=tink_pb2.TINK),
helper.fake_key(value=b'v2',
type_url='t2',
key_id=2,
status=tink_pb2.DESTROYED,
output_prefix_type=tink_pb2.RAW)
])
handle = _keyset_handle(keyset)
expected_keyset_info = tink_pb2.KeysetInfo(primary_key_id=2)
info1 = expected_keyset_info.key_info.add()
info1.type_url = 't1'
info1.status = tink_pb2.ENABLED
info1.output_prefix_type = tink_pb2.TINK
info1.key_id = 1
info2 = expected_keyset_info.key_info.add()
info2.type_url = 't2'
info2.status = tink_pb2.DESTROYED
info2.output_prefix_type = tink_pb2.RAW
info2.key_id = 2
self.assertEqual(expected_keyset_info, handle.keyset_info())
def test_primitive_fails_on_empty_keyset(self):
keyset = tink_pb2.Keyset()
keyset.key.extend(
[helper.fake_key(key_id=1, status=tink_pb2.DESTROYED)])
keyset.primary_key_id = 1
handle = _keyset_handle(keyset)
with self.assertRaisesRegex(core.TinkError, 'empty keyset'):
handle.primitive(aead.Aead)
def test_primitive_fails_on_key_with_unknown_status(self):
keyset = tink_pb2.Keyset()
keyset.key.extend(
[helper.fake_key(key_id=1234, status=tink_pb2.UNKNOWN_STATUS)])
keyset.primary_key_id = 1234
handle = _keyset_handle(keyset)
with self.assertRaisesRegex(core.TinkError,
'key 1234 has unknown status'):
handle.primitive(aead.Aead)
def read(self) -> tink_pb2.Keyset:
if not self._serialized_keyset:
raise tink_error.TinkError('No keyset found')
try:
keyset = tink_pb2.Keyset()
keyset.ParseFromString(self._serialized_keyset)
return keyset
except message.DecodeError as e:
raise tink_error.TinkError(e)
def test_primitive_fails_on_key_without_keydata(self):
keyset = tink_pb2.Keyset()
key = helper.fake_key(key_id=123)
key.ClearField('key_data')
keyset.key.extend([key])
keyset.primary_key_id = 123
handle = _keyset_handle(keyset)
with self.assertRaisesRegex(core.TinkError, 'key 123 has no key data'):
handle.primitive(aead.Aead)
def test_primitive_fails_on_multiple_primary_keys(self):
keyset = tink_pb2.Keyset()
keyset.key.extend(
[helper.fake_key(key_id=12345),
helper.fake_key(key_id=12345)])
keyset.primary_key_id = 12345
handle = _keyset_handle(keyset)
with self.assertRaisesRegex(core.TinkError,
'keyset contains multiple primary keys'):
handle.primitive(aead.Aead)
def test_write_read_with_unicode_chars(self):
keyset = tink_pb2.Keyset()
key = keyset.key.add()
key.key_data.type_url = (
u'\xe3\x82\xb3\xe3\x83\xb3\xe3\x83\x8b\xe3\x83\x81\xe3\x83\x8f')
stream = io.StringIO()
writer = core.JsonKeysetWriter(stream)
writer.write(keyset)
reader = core.JsonKeysetReader(stream.getvalue())
self.assertEqual(keyset, reader.read())
def test_primitive_fails_on_key_with_unknown_prefix(self):
keyset = tink_pb2.Keyset()
keyset.key.extend([
helper.fake_key(key_id=12,
output_prefix_type=tink_pb2.UNKNOWN_PREFIX)
])
keyset.primary_key_id = 12
handle = _keyset_handle(keyset)
with self.assertRaisesRegex(core.TinkError,
'key 12 has unknown prefix'):
handle.primitive(aead.Aead)
def example_keyset():
keyset = tink_pb2.Keyset()
keyset.primary_key_id = 42
key = keyset.key.add()
key.key_data.type_url = u'type.googleapis.com/google.crypto.tink.AesGcmKey'
key.key_data.key_material_type = tink_pb2.KeyData.SYMMETRIC
key.key_data.value = b'GhCS/1+ejWpx68NfGt6ziYHd'
key.output_prefix_type = tink_pb2.TINK
key.key_id = 42
key.status = tink_pb2.ENABLED
return keyset
def public_keyset_handle(self) -> 'KeysetHandle':
"""Returns a new KeysetHandle for the corresponding public keys."""
public_keyset = tink_pb2.Keyset()
for key in self._keyset.key:
public_key = public_keyset.key.add()
public_key.CopyFrom(key)
public_key.key_data.CopyFrom(
registry.Registry.public_key_data(key.key_data))
_validate_key(public_key)
public_keyset.primary_key_id = self._keyset.primary_key_id
return self._create(public_keyset)
def test_read(self):
keyset = tink_pb2.Keyset()
keyset.primary_key_id = 42
key = keyset.key.add()
key.key_data.type_url = 'type.googleapis.com/google.crypto.tink.AesGcmKey'
key.key_data.key_material_type = tink_pb2.KeyData.SYMMETRIC
key.key_data.value = b'GhCS/1+ejWpx68NfGt6ziYHd'
key.output_prefix_type = tink_pb2.TINK
key.key_id = 42
key.status = tink_pb2.ENABLED
reader = core.BinaryKeysetReader(keyset.SerializeToString())
self.assertEqual(keyset, reader.read())
def test_primitive_fails_on_wrong_primitive_class(self):
keyset = tink_pb2.Keyset()
key = keyset.key.add()
key.key_data.CopyFrom(
core.Registry.new_key_data(aead.aead_key_templates.AES128_EAX))
key.output_prefix_type = tink_pb2.TINK
key.key_id = 1
key.status = tink_pb2.ENABLED
keyset.primary_key_id = 1
handle = _keyset_handle(keyset)
with self.assertRaisesRegex(core.TinkError, 'Wrong primitive class'):
handle.primitive(mac.Mac)
def test_primitive_fails_without_primary_key_present(self):
keyset = tink_pb2.Keyset()
key = keyset.key.add()
key.key_data.CopyFrom(
core.Registry.new_key_data(aead.aead_key_templates.AES128_EAX))
key.output_prefix_type = tink_pb2.TINK
key.key_id = 2
key.status = tink_pb2.ENABLED
keyset.primary_key_id = 1
handle = _keyset_handle(keyset)
with self.assertRaisesRegex(
core.TinkError, 'keyset does not contain a valid primary key'):
handle.primitive(aead.Aead)
def test_primitive_success(self):
keyset = tink_pb2.Keyset()
key = keyset.key.add()
key.key_data.CopyFrom(
core.Registry.new_key_data(aead.aead_key_templates.AES128_EAX))
key.output_prefix_type = tink_pb2.TINK
key.key_id = 1
key.status = tink_pb2.ENABLED
keyset.primary_key_id = 1
handle = _keyset_handle(keyset)
aead_primitive = handle.primitive(aead.Aead)
self.assertEqual(
aead_primitive.decrypt(aead_primitive.encrypt(b'message', b'aad'),
b'aad'), b'message')
def generate_new(cls,
key_template: tink_pb2.KeyTemplate) -> 'KeysetHandle':
"""Return a new KeysetHandle.
It contains a single fresh key generated according to key_template.
Args:
key_template: A tink_pb2.KeyTemplate object.
Returns:
A new KeysetHandle.
"""
keyset = tink_pb2.Keyset()
key_data = registry.Registry.new_key_data(key_template)
key_id = _generate_unused_key_id(keyset)
key = keyset.key.add()
key.key_data.CopyFrom(key_data)
key.status = tink_pb2.ENABLED
key.key_id = key_id
key.output_prefix_type = key_template.output_prefix_type
keyset.primary_key_id = key_id
return cls._create(keyset)
def read(self) -> tink_pb2.Keyset:
try:
return json_format.Parse(self._serialized_keyset,
tink_pb2.Keyset())
except json_format.ParseError as e:
raise tink_error.TinkError(e)
def decrypt(self, plaintext: bytes, associated_data: bytes) -> bytes:
return tink_pb2.Keyset(primary_key_id=42).SerializeToString()