Fix EC detection. (#981)

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

@@ -98,7 +98,7 @@ class _Curve:
     ) -> type[cryptography.hazmat.primitives.asymmetric.ec.EllipticCurve]:
         ecclass: (
             type[cryptography.hazmat.primitives.asymmetric.ec.EllipticCurve] | None
-        ) = cryptography.hazmat.primitives.asymmetric.ec.__dict__.get(self.ectype)
+        ) = getattr(cryptography.hazmat.primitives.asymmetric.ec, self.ectype, None)
         if ecclass is None:
             module.fail_json(
                 msg=f"Your cryptography version does not support {self.ectype}"

plugins/modules/crypto_info.py

@@ -350,8 +350,8 @@ def add_crypto_information(module: AnsibleModule) -> dict[str, t.Any]:
         pass
     else:
         for curve_name, constructor_name in CURVES:
-            ecclass = ec.__dict__.get(constructor_name)
-            if ecclass:
+            ecclass = getattr(ec, constructor_name, None)
+            if ecclass is not None:
                 try:
                     ec.generate_private_key(curve=ecclass())
                     curves.append(curve_name)