certmap: load certificate from file in certmap-match CLI

Load the certificate from a file specified in the first argument. Raw
certificate value can be specified using --certificate.

https://pagure.io/freeipa/issue/6646

Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>

ipaclient/plugins/certmap.py

@@ -0,0 +1,49 @@
+#
+# Copyright (C) 2017  FreeIPA Contributors see COPYING for license
+#
+
+from ipaclient.frontend import MethodOverride
+from ipalib import errors, x509
+from ipalib.parameters import File
+from ipalib.plugable import Registry
+from ipalib.text import _
+
+register = Registry()
+
+
+@register(override=True, no_fail=True)
+class certmap_match(MethodOverride):
+    takes_args = (
+        File(
+            'file?',
+            label=_("Input file"),
+            doc=_("File to load the certificate from"),
+            include='cli',
+        ),
+    )
+
+    def get_args(self):
+        for arg in super(certmap_match, self).get_args():
+            if arg.name != 'certificate' or self.api.env.context != 'cli':
+                yield arg
+
+    def get_options(self):
+        for arg in super(certmap_match, self).get_args():
+            if arg.name == 'certificate' and self.api.env.context == 'cli':
+                yield arg.clone(required=False)
+        for option in super(certmap_match, self).get_options():
+            yield option
+
+    def forward(self, *args, **options):
+        if self.api.env.context == 'cli':
+            if args and 'certificate' in options:
+                raise errors.MutuallyExclusiveError(
+                    reason=_("cannot specify both raw certificate and file"))
+            if args:
+                args = [x509.strip_header(args[0])]
+            elif 'certificate' in options:
+                args = [options.pop('certificate')]
+            else:
+                args = []
+
+        return super(certmap_match, self).forward(*args, **options)