expand DSA multibackend support

1 files changed, 34 insertions, 0 deletions

diff --git a/tests/hazmat/backends/test_multibackend.py b/tests/hazmat/backends/test_multibackend.py
index d8c09bd7..c31b235e 100644
--- a/tests/hazmat/backends/test_multibackend.py
+++ b/tests/hazmat/backends/test_multibackend.py
@@ -107,6 +107,18 @@ class DummyDSABackend(object):
     def generate_dsa_private_key(self, parameters):
         pass
 
+    def create_dsa_signature_ctx(self, private_key, algorithm):
+        pass
+
+    def create_dsa_verification_ctx(self, public_key, signature, algorithm):
+        pass
+
+    def dsa_hash_supported(self, algorithm):
+        pass
+
+    def dsa_parameters_supported(self, p, q, g):
+        pass
+
 
 @utils.register_interface(CMACBackend)
 class DummyCMACBackend(object):
@@ -238,6 +250,28 @@ class TestMultiBackend(object):
         ):
             backend.generate_dsa_private_key(parameters)
 
+        with raises_unsupported_algorithm(
+            _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM
+        ):
+            backend.create_dsa_signature_ctx("private_key", hashes.SHA1())
+
+        with raises_unsupported_algorithm(
+            _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM
+        ):
+            backend.create_dsa_verification_ctx(
+                "public_key", b"sig", hashes.SHA1()
+            )
+
+        with raises_unsupported_algorithm(
+            _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM
+        ):
+            backend.dsa_hash_supported(hashes.SHA1())
+
+        with raises_unsupported_algorithm(
+            _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM
+        ):
+            backend.dsa_parameters_supported('p', 'q', 'g')
+
     def test_cmac(self):
         backend = MultiBackend([
             DummyCMACBackend([algorithms.AES])