Fix EC detection. (#981) (#982)

(cherry picked from commit 911ed33c2e)

changelogs/fragments/981-ec.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - "crypto_info, openssl_privatekey, openssl_privatekey_pipe - fix detection of EC support for cryptography 46.0.5+ (https://github.com/ansible-collections/community.crypto/pull/981)."

plugins/module_utils/crypto/module_backends/privatekey.py

@@ -276,7 +276,7 @@ class PrivateKeyBackend:
 class PrivateKeyCryptographyBackend(PrivateKeyBackend):
 
     def _get_ec_class(self, ectype):
-        ecclass = cryptography.hazmat.primitives.asymmetric.ec.__dict__.get(ectype)
+        ecclass = getattr(cryptography.hazmat.primitives.asymmetric.ec, ectype, None)
         if ecclass is None:
             self.module.fail_json(
                 msg="Your cryptography version does not support {0}".format(ectype)

plugins/modules/crypto_info.py

@@ -286,10 +286,8 @@ def add_crypto_information(module):
 
         backend = cryptography.hazmat.backends.default_backend()
         for curve_name, constructor_name in CURVES:
-            ecclass = cryptography.hazmat.primitives.asymmetric.ec.__dict__.get(
-                constructor_name
-            )
-            if ecclass:
+            ecclass = getattr(cryptography.hazmat.primitives.asymmetric.ec, constructor_name, None)
+            if ecclass is not None:
                 try:
                     cryptography.hazmat.primitives.asymmetric.ec.generate_private_key(
                         curve=ecclass(), backend=backend