text: # Copyright 2021 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 that keys are consistently accepted or rejected in all languages."""
  
  from typing import Iterable
  
  from absl.testing import absltest
  from absl.testing import parameterized
  
  import tink
  
  from util import key_util
  from util import supported_key_types
  from util import testing_servers
  
  
  def all_template_names() -> Iterable[str]:
    for names in supported_key_types.KEY_TEMPLATE_NAMES.values():
      for name in names:
        yield name
  
  
  # These key templates are not defined in these languages.
  UNDEFINED_TEMPLATES = [
      ('ECDSA_P384_SHA384_IEEE_P1363', 'cc'),
      ('ECDSA_P384_SHA384_IEEE_P1363', 'java'),
      ('ECDSA_P384_SHA384_IEEE_P1363', 'go'),
      ('AES128_GCM_HKDF_1MB', 'cc'),
      ('AES128_CTR_HMAC_SHA256_1MB', 'cc'),
      ('AES256_CTR_HMAC_SHA256_1MB', 'cc'),
      ('ECIES_P256_COMPRESSED_HKDF_HMAC_SHA256_AES128_GCM', 'go'),
      ('ECIES_P256_COMPRESSED_HKDF_HMAC_SHA256_AES128_CTR_HMAC_SHA256', 'go'),
      ('ECDSA_P256_IEEE_P1363', 'go'),
      ('ECDSA_P384_IEEE_P1363', 'go'),
      ('ECDSA_P521_IEEE_P1363', 'go'),
      ('AES128_GCM_SIV', 'go'),
      ('AES256_GCM_SIV', 'go'),
      ('AES128_EAX_RAW', 'cc'),
      ('AES256_EAX_RAW', 'cc'),
      ('AES128_GCM_SIV_RAW', 'cc'),
      ('AES256_GCM_SIV_RAW', 'cc'),
      ('AES128_GCM_SIV_RAW', 'go'),
      ('AES256_GCM_SIV_RAW', 'go'),
      ('AES128_GCM_RAW', 'go'),
      ('AES128_CTR_HMAC_SHA256_RAW', 'cc'),
      ('AES256_CTR_HMAC_SHA256_RAW', 'cc'),
      ('AES128_CTR_HMAC_SHA256_RAW', 'go'),
      ('AES256_CTR_HMAC_SHA256_RAW', 'go'),
      ('CHACHA20_POLY1305_RAW', 'go'),
      ('XCHACHA20_POLY1305_RAW', 'cc'),
      ('XCHACHA20_POLY1305_RAW', 'go'),
  ]
  
  
  def setUpModule():
    testing_servers.start('key_generation_consistency')
  
  
  def tearDownModule():
    testing_servers.stop()
  
  
  class KeyGenerationConsistencyTest(parameterized.TestCase):
  
    @parameterized.parameters(all_template_names())
    def test_key_template_is_consistent(self, template_name):
      langs = supported_key_types.SUPPORTED_LANGUAGES_BY_TEMPLATE_NAME[
          template_name]
      templates = {}
      for lang in langs:
        if (template_name, lang) in UNDEFINED_TEMPLATES:
          with self.assertRaises(
              tink.TinkError,
              msg=('(%s, %s) is in UNDEFINED_TEMPLATES, but does not fail.' %
                   (template_name, lang))):
            testing_servers.key_template(lang, template_name)
          continue
        try:
          templates[lang] = testing_servers.key_template(lang, template_name)
        except tink.TinkError as e:
          self.fail('(%s,%s): %s' % (lang, template_name, e))
      if len(templates) <= 1:
        # nothing to check.
        return
      langs = list(templates.keys())
      template = templates[langs[0]]
      for lang in langs[1:]:
        key_util.assert_tink_proto_equal(
            self,
            templates[lang],
            template,
            msg=('templates in %s and %s are not equal:' % (langs[0], lang)))
  
  
  if __name__ == '__main__':
    absltest.main()
  