def new_aes_gcm_key_template(self, key_size):
key_format = aes_gcm_pb2.AesGcmKeyFormat()
key_format.key_size = key_size
key_template = tink_pb2.KeyTemplate()
key_template.type_url = ('type.googleapis.com/google.crypto.tink.AesGcmKey')
key_template.value = key_format.SerializeToString()
return key_template
def test_aes256_gcm(self):
template = aead.aead_key_templates.AES256_GCM
self.assertEqual('type.googleapis.com/google.crypto.tink.AesGcmKey',
template.type_url)
self.assertEqual(tink_pb2.TINK, template.output_prefix_type)
key_format = aes_gcm_pb2.AesGcmKeyFormat()
key_format.ParseFromString(template.value)
self.assertEqual(32, key_format.key_size)
def create_aes_gcm_key_template(key_size: int) -> tink_pb2.KeyTemplate:
"""Creates an AES GCM KeyTemplate, and fills in its values."""
key_format = aes_gcm_pb2.AesGcmKeyFormat()
key_format.key_size = key_size
key_template = tink_pb2.KeyTemplate()
key_template.value = key_format.SerializeToString()
key_template.type_url = _AES_GCM_KEY_TYPE_URL
key_template.output_prefix_type = tink_pb2.TINK
return key_template
def test_create_aes_gcm_key_template(self):
# Intentionally using 'weird' or invalid values for parameters,
# to test that the function correctly puts them in the resulting template.
template = aead_key_templates.create_aes_gcm_key_template(key_size=42)
self.assertEqual('type.googleapis.com/google.crypto.tink.AesGcmKey',
template.type_url)
self.assertEqual(tink_pb2.TINK, template.output_prefix_type)
key_format = aes_gcm_pb2.AesGcmKeyFormat()
key_format.ParseFromString(template.value)
self.assertEqual(42, key_format.key_size)
