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 "trace.h"
  24
  25 bool qauthz_is_allowed(QAuthZ *authz,
  26                        const char *identity,
  27                        Error **errp)
  28 {
  29     QAuthZClass *cls = QAUTHZ_GET_CLASS(authz);
  30     bool allowed;
  31
  32     allowed = cls->is_allowed(authz, identity, errp);
  33     trace_qauthz_is_allowed(authz, identity, allowed);
  34
  35     return allowed;
  36 }
  37
  38
  39 bool qauthz_is_allowed_by_id(const char *authzid,
  40                              const char *identity,
  41                              Error **errp)
  42 {
  43     QAuthZ *authz;
  44     Object *obj;
  45     Object *container;
  46
  47     container = object_get_objects_root();
  48     obj = object_resolve_path_component(container,
  49                                         authzid);
  50     if (!obj) {
  51         error_setg(errp, "Cannot find QAuthZ object ID %s",
  52                    authzid);
  53         return false;
  54     }
  55
  56     if (!object_dynamic_cast(obj, TYPE_QAUTHZ)) {
  57         error_setg(errp, "Object '%s' is not a QAuthZ subclass",
  58                    authzid);
  59         return false;
  60     }
  61
  62     authz = QAUTHZ(obj);
  63
  64     return qauthz_is_allowed(authz, identity, errp);
  65 }
  66
  67
  68 static const TypeInfo authz_info = {
  69     .parent = TYPE_OBJECT,
  70     .name = TYPE_QAUTHZ,
  71     .instance_size = sizeof(QAuthZ),
  72     .class_size = sizeof(QAuthZClass),
  73     .abstract = true,
  74 };
  75
  76 static void qauthz_register_types(void)
  77 {
  78     type_register_static(&authz_info);
  79 }
  80
  81 type_init(qauthz_register_types)
  82