commit 7c9fa3a7384d3b8e14dc8a56390cd4fce222dcba
author Paul Kehrer <paul.l.kehrer@gmail.com> Fri Jun 27 16:14:00 2014 -0600
committer Paul Kehrer <paul.l.kehrer@gmail.com> Fri Jun 27 16:14:00 2014 -0600
tree 957eabf38c774dacffdc226eea7cfd1e84c929a3
parent 0e2ee9b15b78fb2e7e08643b1adcdabb63f441e3

add multibackend support for new DSABackend method

cryptography/hazmat/backends/multibackend.py

diff --git a/cryptography/hazmat/backends/multibackend.py b/cryptography/hazmat/backends/multibackend.py
index 27ab063..800c350 100644
--- a/cryptography/hazmat/backends/multibackend.py
+++ b/cryptography/hazmat/backends/multibackend.py
@@ -205,6 +205,12 @@
         raise UnsupportedAlgorithm("DSA is not supported by the backend.",
                                    _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM)
 
+    def generate_dsa_private_key_and_parameters(self, key_size):
+        for b in self._filtered_backends(DSABackend):
+            return b.generate_dsa_private_key_and_parameters(key_size)
+        raise UnsupportedAlgorithm("DSA is not supported by the backend.",
+                                   _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM)
+
     def create_dsa_verification_ctx(self, public_key, signature, algorithm):
         for b in self._filtered_backends(DSABackend):
             return b.create_dsa_verification_ctx(public_key, signature,

tests/hazmat/backends/test_multibackend.py

diff --git a/tests/hazmat/backends/test_multibackend.py b/tests/hazmat/backends/test_multibackend.py
index 64dc062..a68fe56 100644
--- a/tests/hazmat/backends/test_multibackend.py
+++ b/tests/hazmat/backends/test_multibackend.py
@@ -128,6 +128,9 @@
     def generate_dsa_private_key(self, parameters):
         pass
 
+    def generate_dsa_private_key_and_parameters(self, key_size):
+        pass
+
     def create_dsa_signature_ctx(self, private_key, algorithm):
         pass
 
@@ -343,6 +346,7 @@
 
         parameters = object()
         backend.generate_dsa_private_key(parameters)
+        backend.generate_dsa_private_key_and_parameters(key_size=1024)
 
         backend.create_dsa_verification_ctx("public_key", "sig", hashes.SHA1())
         backend.create_dsa_signature_ctx("private_key", hashes.SHA1())
@@ -363,6 +367,11 @@
         with raises_unsupported_algorithm(
             _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM
         ):
+            backend.generate_dsa_private_key_and_parameters(key_size=1024)
+
+        with raises_unsupported_algorithm(
+            _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM
+        ):
             backend.create_dsa_signature_ctx("private_key", hashes.SHA1())
 
         with raises_unsupported_algorithm(