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-rw-r--r--cryptography/hazmat/backends/multibackend.py3
-rw-r--r--tests/hazmat/backends/test_multibackend.py6
2 files changed, 4 insertions, 5 deletions
diff --git a/cryptography/hazmat/backends/multibackend.py b/cryptography/hazmat/backends/multibackend.py
index 24a7a357..981a60bd 100644
--- a/cryptography/hazmat/backends/multibackend.py
+++ b/cryptography/hazmat/backends/multibackend.py
@@ -170,4 +170,5 @@ class MultiBackend(object):
return b.create_cmac_ctx(algorithm)
except UnsupportedAlgorithm:
pass
- raise UnsupportedAlgorithm("This backend does not support CMAC")
+ raise UnsupportedAlgorithm("This backend does not support CMAC",
+ _Reasons.UNSUPPORTED_CIPHER)
diff --git a/tests/hazmat/backends/test_multibackend.py b/tests/hazmat/backends/test_multibackend.py
index 2fa9f758..d8c09bd7 100644
--- a/tests/hazmat/backends/test_multibackend.py
+++ b/tests/hazmat/backends/test_multibackend.py
@@ -13,8 +13,6 @@
from __future__ import absolute_import, division, print_function
-import pytest
-
from cryptography import utils
from cryptography.exceptions import (
UnsupportedAlgorithm, _Reasons
@@ -120,7 +118,7 @@ class DummyCMACBackend(object):
def create_cmac_ctx(self, algorithm):
if not self.cmac_algorithm_supported(algorithm):
- raise UnsupportedAlgorithm("")
+ raise UnsupportedAlgorithm("", _Reasons.UNSUPPORTED_CIPHER)
class TestMultiBackend(object):
@@ -252,5 +250,5 @@ class TestMultiBackend(object):
cmac.CMAC(algorithms.AES(fake_key), backend)
- with pytest.raises(UnsupportedAlgorithm):
+ with raises_unsupported_algorithm(_Reasons.UNSUPPORTED_CIPHER):
cmac.CMAC(algorithms.TripleDES(fake_key), backend)