2 files changed, 12 insertions, 4 deletions
diff --git a/cryptography/hazmat/backends/openssl/backend.py b/cryptography/hazmat/backends/openssl/backend.py
index 9cf92f9b..7746dafb 100644
--- a/cryptography/hazmat/backends/openssl/backend.py
+++ b/cryptography/hazmat/backends/openssl/backend.py
@@ -915,10 +915,7 @@ class Backend(object):
         ):
             return False
 
-        if not self.elliptic_curve_supported(curve):
-            return False
-        else:
-            return True
+        return self.elliptic_curve_supported(curve)
 
     def _supported_curves(self):
         if self._lib.Cryptography_HAS_EC != 1:
diff --git a/cryptography/hazmat/primitives/asymmetric/rsa.py b/cryptography/hazmat/primitives/asymmetric/rsa.py
index 481797fe..b256ddcc 100644
--- a/cryptography/hazmat/primitives/asymmetric/rsa.py
+++ b/cryptography/hazmat/primitives/asymmetric/rsa.py
@@ -21,6 +21,17 @@ from cryptography.hazmat.backends.interfaces import RSABackend
 from cryptography.hazmat.primitives import interfaces
 
 
+def generate_private_key(public_exponent, key_size, backend):
+    if not isinstance(backend, RSABackend):
+        raise UnsupportedAlgorithm(
+            "Backend object does not implement RSABackend.",
+            _Reasons.BACKEND_MISSING_INTERFACE
+        )
+
+    _verify_rsa_parameters(public_exponent, key_size)
+    return backend.generate_rsa_private_key(public_exponent, key_size)
+
+
 def _verify_rsa_parameters(public_exponent, key_size):
     if public_exponent < 3:
         raise ValueError("public_exponent must be >= 3.")