2 files changed, 54 insertions, 0 deletions
diff --git a/src/cryptography/hazmat/backends/interfaces.py b/src/cryptography/hazmat/backends/interfaces.py
index f433afcb..8fc78309 100644
--- a/src/cryptography/hazmat/backends/interfaces.py
+++ b/src/cryptography/hazmat/backends/interfaces.py
@@ -250,3 +250,18 @@ class PKCS8SerializationBackend(object):
         Load a private key from PKCS8 encoded data, using password if the data
         is encrypted.
         """
+
+
+@six.add_metaclass(abc.ABCMeta)
+class X509Backend(object):
+    @abc.abstractmethod
+    def load_pem_x509_certificate(self, data):
+        """
+        Load an X.509 certificate from PEM encoded data.
+        """
+
+    @abc.abstractmethod
+    def load_der_x509_certificate(self, data):
+        """
+        Load an X.509 certificate from DER encoded data.
+        """
diff --git a/src/cryptography/hazmat/primitives/interfaces.py b/src/cryptography/hazmat/primitives/interfaces.py
index 7d9fc4fb..18a62601 100644
--- a/src/cryptography/hazmat/primitives/interfaces.py
+++ b/src/cryptography/hazmat/primitives/interfaces.py
@@ -488,3 +488,42 @@ class MACContext(object):
 
 # DeprecatedIn07
 CMACContext = MACContext
+
+
+@six.add_metaclass(abc.ABCMeta)
+class X509Certificate(object):
+    @abc.abstractmethod
+    def fingerprint(self, algorithm):
+        """
+        Returns bytes using digest passed.
+        """
+
+    @abc.abstractproperty
+    def serial(self):
+        """
+        Returns certificate serial number
+        """
+
+    @abc.abstractproperty
+    def version(self):
+        """
+        Returns the certificate version
+        """
+
+    @abc.abstractmethod
+    def public_key(self):
+        """
+        Returns the public key
+        """
+
+    @abc.abstractproperty
+    def not_before(self):
+        """
+        Not before time (represented as UTC datetime)
+        """
+
+    @abc.abstractproperty
+    def not_after(self):
+        """
+        Not after time (represented as UTC datetime)
+        """