Register entry points of Custodia plugins

With setuptools in place FreeIPA is able to register its Custodia
plugins. Custodia 0.1 ignores the plugins directives. Custodia 0.2 uses
the entry points to discover plugins.

https://fedorahosted.org/freeipa/ticket/6492

Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>

ipapython/secrets/store.py

@@ -217,7 +217,7 @@ NAME_DB_MAP = {
 }
 
 
-class iSecStore(CSStore):
+class IPASecStore(CSStore):
 
     def __init__(self, config=None):
         self.config = config
@@ -255,3 +255,7 @@ class iSecStore(CSStore):
 
     def span(self, key):
         raise NotImplementedError
+
+
+# backwards compatibility with FreeIPA 4.3 and 4.4.
+iSecStore = IPASecStore

ipapython/setup.py

@@ -61,4 +61,12 @@ if __name__ == '__main__':
         extras_require={
             ":python_version<'3'": ["enum34"],
         },
+        entry_points={
+            'custodia.authorizers': [
+                'IPAKEMKeys = ipapython.secrets.kem:IPAKEMKeys',
+            ],
+            'custodia.stores': [
+                'IPASecStore = ipapython.secrets.store:IPASecStore',
+            ],
+        },
     )