ARC4 support
diff --git a/tests/hazmat/primitives/utils.py b/tests/hazmat/primitives/utils.py
index e6e97d1..90c15b1 100644
--- a/tests/hazmat/primitives/utils.py
+++ b/tests/hazmat/primitives/utils.py
@@ -49,6 +49,45 @@
assert actual_plaintext == binascii.unhexlify(plaintext)
+def generate_stream_encryption_test(param_loader, path, file_names,
+ cipher_factory, only_if=None,
+ skip_message=None):
+ def test_stream_encryption(self):
+ for backend in _ALL_BACKENDS:
+ for file_name in file_names:
+ for params in param_loader(os.path.join(path, file_name)):
+ yield (
+ stream_encryption_test,
+ backend,
+ cipher_factory,
+ params,
+ only_if,
+ skip_message
+ )
+ return test_stream_encryption
+
+
+def stream_encryption_test(backend, cipher_factory, params, only_if,
+ skip_message):
+ if not only_if(backend):
+ pytest.skip(skip_message)
+ plaintext = params.pop("plaintext")
+ ciphertext = params.pop("ciphertext")
+ offset = params.pop("offset")
+ cipher = Cipher(cipher_factory(**params), None, backend)
+ encryptor = cipher.encryptor()
+ # throw away offset bytes
+ encryptor.update(b"\x00" * int(offset))
+ actual_ciphertext = encryptor.update(binascii.unhexlify(plaintext))
+ actual_ciphertext += encryptor.finalize()
+ assert actual_ciphertext == binascii.unhexlify(ciphertext)
+ decryptor = cipher.decryptor()
+ decryptor.update(b"\x00" * int(offset))
+ actual_plaintext = decryptor.update(binascii.unhexlify(ciphertext))
+ actual_plaintext += decryptor.finalize()
+ assert actual_plaintext == binascii.unhexlify(plaintext)
+
+
def generate_hash_test(param_loader, path, file_names, hash_cls,
only_if=None, skip_message=None):
def test_hash(self):