Make the authorizer and registry authorizer configurable

Fixes: #12584

This change makes the authorizer and registryAuthorizer of the registry client configurable via options. This allows Go SDK users to override the authentication behavior of the client.

This PR makes both the authorizer and registryAuthorizer configurable because depending on the exact scenario that may be needed. The default registryAuthorizer only supports a specific implementation of the authorizer.

Signed-off-by: Ryan Nowak <nowakra@gmail.com>

Author: rynowak

pkg/registry/client.go

@@ -175,6 +175,26 @@ func ClientOptWriter(out io.Writer) ClientOption {
 	}
 }
 
+// ClientOptAuthorizer returns a function that sets the authorizer setting on a client options set. This
+// can be used to override the default authorization mechanism.
+//
+// Depending on the use-case you may need to set both ClientOptAuthorizer and ClientOptRegistryAuthorizer.
+func ClientOptAuthorizer(authorizer auth.Client) ClientOption {
+	return func(client *Client) {
+		client.authorizer = authorizer
+	}
+}
+
+// ClientOptRegistryAuthorizer returns a function that sets the registry authorizer setting on a client options set. This
+// can be used to override the default authorization mechanism.
+//
+// Depending on the use-case you may need to set both ClientOptAuthorizer and ClientOptRegistryAuthorizer.
+func ClientOptRegistryAuthorizer(registryAuthorizer *registryauth.Client) ClientOption {
+	return func(client *Client) {
+		client.registryAuthorizer = registryAuthorizer
+	}
+}
+
 // ClientOptCredentialsFile returns a function that sets the credentialsFile setting on a client options set
 func ClientOptCredentialsFile(credentialsFile string) ClientOption {
 	return func(client *Client) {