authz/base.c

   1 /*
   2  * QEMU authorization framework base class
   3  *
   4  * Copyright (c) 2018 Red Hat, Inc.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20
  21 #include "qemu/osdep.h"
  22 #include "authz/base.h"
  23 #include "qemu/module.h"
  24 #include "trace.h"
  25
  26 bool qauthz_is_allowed(QAuthZ *authz,
  27                        const char *identity,
  28                        Error **errp)
  29 {
  30     QAuthZClass *cls = QAUTHZ_GET_CLASS(authz);
  31     bool allowed;
  32
  33     allowed = cls->is_allowed(authz, identity, errp);
  34     trace_qauthz_is_allowed(authz, identity, allowed);
  35
  36     return allowed;
  37 }
  38
  39
  40 bool qauthz_is_allowed_by_id(const char *authzid,
  41                              const char *identity,
  42                              Error **errp)
  43 {
  44     QAuthZ *authz;
  45     Object *obj;
  46     Object *container;
  47
  48     container = object_get_objects_root();
  49     obj = object_resolve_path_component(container,
  50                                         authzid);
  51     if (!obj) {
  52         error_setg(errp, "Cannot find QAuthZ object ID %s",
  53                    authzid);
  54         return false;
  55     }
  56
  57     if (!object_dynamic_cast(obj, TYPE_QAUTHZ)) {
  58         error_setg(errp, "Object '%s' is not a QAuthZ subclass",
  59                    authzid);
  60         return false;
  61     }
  62
  63     authz = QAUTHZ(obj);
  64
  65     return qauthz_is_allowed(authz, identity, errp);
  66 }
  67
  68
  69 static const TypeInfo authz_info = {
  70     .parent = TYPE_OBJECT,
  71     .name = TYPE_QAUTHZ,
  72     .instance_size = sizeof(QAuthZ),
  73     .class_size = sizeof(QAuthZClass),
  74     .abstract = true,
  75 };
  76
  77 static void qauthz_register_types(void)
  78 {
  79     type_register_static(&authz_info);
  80 }
  81
  82 type_init(qauthz_register_types)
  83