Merge pull request #1164 from reaperhulk/dsa-numbers-loading

add new DSABackend interface methods for loading numbers

1 files changed, 18 insertions, 0 deletions

diff --git a/cryptography/hazmat/backends/interfaces.py b/cryptography/hazmat/backends/interfaces.py
index 524e0a5b..e4faf32c 100644
--- a/cryptography/hazmat/backends/interfaces.py
+++ b/cryptography/hazmat/backends/interfaces.py
@@ -196,6 +196,24 @@ class DSABackend(object):
         Return True if the parameters are supported by the backend for DSA.
         """
 
+    @abc.abstractmethod
+    def load_dsa_private_numbers(self, numbers):
+        """
+        Returns a DSAPrivateKey provider.
+        """
+
+    @abc.abstractmethod
+    def load_dsa_public_numbers(self, numbers):
+        """
+        Returns a DSAPublicKey provider.
+        """
+
+    @abc.abstractmethod
+    def load_dsa_parameter_numbers(self, numbers):
+        """
+        Returns a DSAParameters provider.
+        """
+
 
 @six.add_metaclass(abc.ABCMeta)
 class TraditionalOpenSSLSerializationBackend(object):