20     only_if=lambda backend: backend.cipher_supported(
39     def test_xts_vectors(self, vector, backend):  argument
44         cipher = base.Cipher(algorithms.AES(key), modes.XTS(tweak), backend)
54     only_if=lambda backend: backend.cipher_supported(
87     only_if=lambda backend: backend.cipher_supported(
120     only_if=lambda backend: backend.cipher_supported(
153     only_if=lambda backend: backend.cipher_supported(
186     only_if=lambda backend: backend.cipher_supported(
219     only_if=lambda backend: backend.cipher_supported(
236     only_if=lambda backend: backend.cipher_supported(
258     def test_gcm_tag_with_only_aad(self, backend):  argument
267             backend=backend
274     def test_gcm_ciphertext_with_no_aad(self, backend):  argument
284             backend=backend
291     def test_gcm_ciphertext_limit(self, backend):  argument
295             backend=backend
305     def test_gcm_aad_limit(self, backend):  argument
309             backend=backend
317     def test_gcm_ciphertext_increments(self, backend):  argument
321             backend=backend
330     def test_gcm_aad_increments(self, backend):  argument
334             backend=backend
341     def test_gcm_tag_decrypt_none(self, backend):  argument
349             backend=backend
355             backend._lib.CRYPTOGRAPHY_OPENSSL_LESS_THAN_102 and
356             not backend._lib.CRYPTOGRAPHY_IS_LIBRESSL
362                     backend=backend
368                 backend=backend
374     def test_gcm_tag_decrypt_mode(self, backend):  argument
382             backend=backend
391             backend=backend
396     def test_gcm_tag_decrypt_finalize(self, backend):  argument
404             backend=backend
411             backend._lib.CRYPTOGRAPHY_OPENSSL_LESS_THAN_102 and
412             not backend._lib.CRYPTOGRAPHY_IS_LIBRESSL
418                     backend=backend
423                 backend=backend
429                 backend=backend
434             backend._lib.CRYPTOGRAPHY_OPENSSL_LESS_THAN_102 and
435             not backend._lib.CRYPTOGRAPHY_IS_LIBRESSL
444         only_if=lambda backend: (
445             not backend._lib.CRYPTOGRAPHY_OPENSSL_LESS_THAN_102 or
446             backend._lib.CRYPTOGRAPHY_IS_LIBRESSL
450     def test_gcm_tag_decrypt_finalize_tag_length(self, backend):  argument
454             backend=backend
459     def test_buffer_protocol(self, backend):  argument
464             backend
471             backend
490 def test_buffer_protocol_alternate_modes(mode, backend):  argument
493         algorithms.AES(bytearray(b"\x00" * 32)), mode, backend