simplify hmac supported and hash supported calls for commoncrypto

1 files changed, 2 insertions, 12 deletions

diff --git a/cryptography/hazmat/backends/commoncrypto/backend.py b/cryptography/hazmat/backends/commoncrypto/backend.py
index 4e70cab5..b612a805 100644
--- a/cryptography/hazmat/backends/commoncrypto/backend.py
+++ b/cryptography/hazmat/backends/commoncrypto/backend.py
@@ -90,20 +90,10 @@ class Backend(object):
         }
 
     def hash_supported(self, algorithm):
-        try:
-            self._hash_mapping[algorithm.name]
-        except KeyError:
-            return False
-        else:
-            return True
+        return algorithm.name in self._hash_mapping
 
     def hmac_supported(self, algorithm):
-        try:
-            self._supported_hmac_algorithms[algorithm.name]
-        except KeyError:
-            return False
-        else:
-            return True
+        return algorithm.name in self._supported_hmac_algorithms
 
     def create_hash_ctx(self, algorithm):
         return _HashContext(self, algorithm)