usr/src/lib/policykit/libpolkit/common/libpolkit-rbac.c

   1 /***************************************************************************
   2  *
   3  * libpolkit-rbac.c : RBAC implementation of the libpolkit API
   4  *
   5  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
   6  * Use is subject to license terms.
   7  *
   8  * Licensed under the Academic Free License version 2.1
   9  *
  10  **************************************************************************/
  11
  12 #pragma ident   "%Z%%M% %I%     %E% SMI"
  13
  14 #ifdef HAVE_CONFIG_H
  15 #  include <config.h>
  16 #endif
  17
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <string.h>
  21 #include <sys/types.h>
  22 #include <pwd.h>
  23 #include <grp.h>
  24 #include <unistd.h>
  25 #include <errno.h>
  26 #include <auth_attr.h>
  27 #include <secdb.h>
  28
  29 #include <glib.h>
  30 #include <dbus/dbus-glib.h>
  31
  32 #include "libpolkit.h"
  33
  34 #define LIBPOLKIT_MAGIC 0x3117beef
  35
  36
  37 #define LIBPOLKIT_CHECK_CONTEXT(_ctx_, _ret_)                           \
  38         do {                                                                    \
  39                 if (_ctx_ == NULL) {                                            \
  40                         g_warning ("%s: given LibPolKitContext is NULL",     \
  41                                    __FUNCTION__);                               \
  42                         return _ret_;                                           \
  43                 }                                                               \
  44                 if (_ctx_->magic != LIBPOLKIT_MAGIC) {                  \
  45                         g_warning ("%s: given LibPolKitContext is invalid (read magic 0x%08x, should be 0x%08x)",  \
  46                                    __FUNCTION__, _ctx_->magic, LIBPOLKIT_MAGIC);        \
  47                         return _ret_;                                           \
  48                 }                                                               \
  49         } while(0)
  50
  51
  52 struct LibPolKitContext_s
  53 {
  54         guint32 magic;
  55 };
  56
  57 /** Get a new context.
  58  *
  59  *  @return                     Pointer to new context or NULL if an error occured
  60  */
  61 LibPolKitContext *
  62 libpolkit_new_context (DBusConnection *connection)
  63 {
  64         LibPolKitContext *ctx;
  65
  66         ctx = g_new0 (LibPolKitContext, 1);
  67         ctx->magic = LIBPOLKIT_MAGIC;
  68
  69         return ctx;
  70 }
  71
  72 /** Free a context
  73  *
  74  *  @param  ctx                 The context obtained from libpolkit_new_context
  75  *  @return                     Pointer to new context or NULL if an error occured
  76  */
  77 gboolean
  78 libpolkit_free_context (LibPolKitContext *ctx)
  79 {
  80         LIBPOLKIT_CHECK_CONTEXT (ctx, FALSE);
  81
  82         ctx->magic = 0;
  83         g_free (ctx);
  84         return TRUE;
  85 }
  86
  87 LibPolKitResult
  88 libpolkit_get_allowed_resources_for_privilege_for_uid (LibPolKitContext    *ctx,
  89                                                        const char          *user,
  90                                                        const char          *privilege,
  91                                                        GList              **resources,
  92                                                        GList              **restrictions,
  93                                                        int                 *num_non_temporary)
  94 {
  95         LibPolKitResult res;
  96         char **resource_list;
  97         int num_resources;
  98         char **restriction_list;
  99         int num_restrictions;
 100
 101         LIBPOLKIT_CHECK_CONTEXT (ctx, LIBPOLKIT_RESULT_INVALID_CONTEXT);
 102
 103         res = LIBPOLKIT_RESULT_ERROR;
 104         *resources = NULL;
 105         *restrictions = NULL;
 106
 107         res = LIBPOLKIT_RESULT_OK;
 108
 109         return res;
 110 }
 111
 112 LibPolKitResult
 113 libpolkit_is_uid_allowed_for_privilege (LibPolKitContext   *ctx,
 114                                         const char         *system_bus_unique_name,
 115                                         const char         *user,
 116                                         const char         *privilege,
 117                                         const char         *resource,
 118                                         gboolean           *out_is_allowed,
 119                                         gboolean           *out_is_temporary,
 120                                         char              **out_is_privileged_but_restricted_to_system_bus_unique_name)
 121 {
 122         LibPolKitResult res;
 123         const char *myresource = "";
 124         const char *mysystem_bus_unique_name = "";
 125         char *but_restricted_to = NULL;
 126         uid_t uid;
 127         struct passwd *pw;
 128         char *authname;
 129         int i;
 130         gboolean authname_free = FALSE;
 131
 132         LIBPOLKIT_CHECK_CONTEXT (ctx, LIBPOLKIT_RESULT_INVALID_CONTEXT);
 133
 134         uid = (uid_t)atol (user);
 135         if ((pw = getpwuid (uid)) == NULL) {
 136                 *out_is_allowed = FALSE;
 137                 *out_is_temporary = FALSE;
 138                 return LIBPOLKIT_RESULT_NO_SUCH_USER;
 139         }
 140
 141         /* map PolicyKit privilege to RBAC authorization */
 142         if (strcmp (privilege, "hal-storage-removable-mount") == 0) {
 143                 authname = "solaris.device.mount.removable";
 144         } else if (strcmp (privilege, "hal-storage-removable-mount-all-options") == 0) {
 145                 authname = "solaris.device.mount.alloptions.removable";
 146         } else if (strcmp (privilege, "hal-storage-fixed-mount") == 0) {
 147                 authname = "solaris.device.mount.fixed";
 148         } else if (strcmp (privilege, "hal-storage-fixed-mount-all-options") == 0) {
 149                 authname = "solaris.device.mount.alloptions.fixed";
 150         } else if (strcmp(privilege, "hal-power-suspend") == 0) {
 151                 authname = "solaris.system.power.suspend.ram";
 152         } else if (strcmp(privilege, "hal-power-hibernate") == 0) {
 153                 authname = "solaris.system.power.suspend.disk";
 154         } else if ((strcmp(privilege, "hal-power-shutdown") == 0) ||
 155             (strcmp(privilege, "hal-power-reboot") == 0)) {
 156                 authname = "solaris.system.shutdown";
 157         } else if (strcmp(privilege, "hal-power-cpu") == 0) {
 158                 authname = "solaris.system.power.cpu";
 159         } else if (strcmp(privilege, "hal-power-brightness") == 0) {
 160                 authname = "solaris.system.power.brightness";
 161         } else if (strcmp (privilege, "hal-power-cpu") == 0) {
 162                 authname = "solaris.system.power.cpu";
 163         } else {
 164                 /* replace '-' with '.' */
 165                 authname = g_strdup (privilege);
 166                 authname_free = TRUE;
 167                 for (i = 0; i < strlen (authname); i++) {
 168                         if (authname[i] == '-') {
 169                                 authname[i] = '.';
 170                         }
 171                 }
 172         }
 173
 174         *out_is_allowed = (chkauthattr(authname, pw->pw_name) != 0);
 175         *out_is_temporary = FALSE;
 176
 177         if (authname_free) {
 178                 g_free(authname);
 179         }
 180
 181         return LIBPOLKIT_RESULT_OK;
 182 }
 183
 184 LibPolKitResult
 185 libpolkit_get_privilege_list (LibPolKitContext      *ctx,
 186                               GList                **result)
 187 {
 188         LibPolKitResult res;
 189         char **privilege_list;
 190         int num_privileges = 0;
 191         int i;
 192
 193         LIBPOLKIT_CHECK_CONTEXT (ctx, LIBPOLKIT_RESULT_INVALID_CONTEXT);
 194
 195         *result = NULL;
 196
 197         for (i = 0; i < num_privileges; i++) {
 198                 *result = g_list_append (*result, g_strdup (privilege_list[i]));
 199         }
 200
 201         res = LIBPOLKIT_RESULT_OK;
 202
 203         return res;
 204 }
 205
 206 LibPolKitResult
 207 libpolkit_revoke_temporary_privilege (LibPolKitContext      *ctx,
 208                                       const char            *user,
 209                                       const char            *privilege,
 210                                       const char            *resource,
 211                                       gboolean              *result)
 212 {
 213         return LIBPOLKIT_RESULT_OK;
 214 }