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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
*
* Copyright (C) 2010 Richard Hughes <richard@hughsie.com>
*
* Licensed under the GNU General Public License Version 2
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <string.h>
#include <polkit/polkit.h>
#include "cd-common.h"
#if !defined(POLKIT_HAS_AUTOPTR_MACROS)
G_DEFINE_AUTOPTR_CLEANUP_FUNC(PolkitAuthorizationResult, g_object_unref)
G_DEFINE_AUTOPTR_CLEANUP_FUNC(PolkitSubject, g_object_unref)
G_DEFINE_AUTOPTR_CLEANUP_FUNC(PolkitAuthority, g_object_unref)
#endif
GQuark
cd_client_error_quark (void)
{
guint i;
static GQuark quark = 0;
if (!quark) {
quark = g_quark_from_static_string ("colord");
for (i = 0; i < CD_CLIENT_ERROR_LAST; i++) {
g_dbus_error_register_error (quark,
i,
cd_client_error_to_string (i));
}
}
return quark;
}
gchar *
cd_main_ensure_dbus_path (const gchar *object_path)
{
gchar *object_path_tmp;
object_path_tmp = g_strdup (object_path);
g_strcanon (object_path_tmp,
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"1234567890_",
'_');
return object_path_tmp;
}
guint
cd_main_get_sender_uid (GDBusConnection *connection,
const gchar *sender,
GError **error)
{
guint uid = G_MAXUINT;
g_autoptr(GVariant) value = NULL;
/* call into DBus to get the user ID that issued the request */
value = g_dbus_connection_call_sync (connection,
"org.freedesktop.DBus",
"/org/freedesktop/DBus",
"org.freedesktop.DBus",
"GetConnectionUnixUser",
g_variant_new ("(s)",
sender),
NULL,
G_DBUS_CALL_FLAGS_NONE,
200,
NULL,
error);
if (value != NULL)
g_variant_get (value, "(u)", &uid);
return uid;
}
guint
cd_main_get_sender_pid (GDBusConnection *connection,
const gchar *sender,
GError **error)
{
guint pid = G_MAXUINT;
g_autoptr(GVariant) value = NULL;
/* call into DBus to get the user ID that issued the request */
value = g_dbus_connection_call_sync (connection,
"org.freedesktop.DBus",
"/org/freedesktop/DBus",
"org.freedesktop.DBus",
"GetConnectionUnixProcessID",
g_variant_new ("(s)",
sender),
NULL,
G_DBUS_CALL_FLAGS_NONE,
200,
NULL,
error);
if (value != NULL)
g_variant_get (value, "(u)", &pid);
return pid;
}
gboolean
cd_main_sender_authenticated (GDBusConnection *connection,
const gchar *sender,
const gchar *action_id,
GError **error)
{
guint uid;
g_autoptr(GError) error_local = NULL;
g_autoptr(PolkitAuthority) authority = NULL;
g_autoptr(PolkitAuthorizationResult) result = NULL;
g_autoptr(PolkitSubject) subject = NULL;
/* uid 0 is allowed to do all actions */
uid = cd_main_get_sender_uid (connection, sender, &error_local);
if (uid == G_MAXUINT) {
g_set_error (error,
CD_CLIENT_ERROR,
CD_CLIENT_ERROR_FAILED_TO_AUTHENTICATE,
"could not get uid to authenticate %s: %s",
action_id,
error_local->message);
return FALSE;
}
/* the root user can always do all actions */
if (uid == 0) {
g_debug ("CdCommon: not checking %s for %s as uid 0",
action_id, sender);
return TRUE;
}
#ifdef HAVE_GETUID
/* a client running as the daemon user may also do all actions */
if (uid == getuid ()) {
g_debug ("CdCommon: not checking %s for %s as running as daemon user",
action_id, sender);
return TRUE;
}
#endif
/* get authority */
authority = polkit_authority_get_sync (NULL, &error_local);
if (authority == NULL) {
g_set_error (error,
CD_CLIENT_ERROR,
CD_CLIENT_ERROR_FAILED_TO_AUTHENTICATE,
"failed to get polkit authorit: %s",
error_local->message);
return FALSE;
}
/* do authorization async */
subject = polkit_system_bus_name_new (sender);
result = polkit_authority_check_authorization_sync (authority, subject,
action_id,
NULL,
POLKIT_CHECK_AUTHORIZATION_FLAGS_ALLOW_USER_INTERACTION,
NULL,
&error_local);
if (result == NULL) {
g_set_error (error,
CD_CLIENT_ERROR,
CD_CLIENT_ERROR_FAILED_TO_AUTHENTICATE,
"could not check %s for auth: %s",
action_id,
error_local->message);
return FALSE;
}
/* did not auth */
if (!polkit_authorization_result_get_is_authorized (result)) {
g_set_error (error,
CD_CLIENT_ERROR,
CD_CLIENT_ERROR_FAILED_TO_AUTHENTICATE,
"failed to obtain %s auth",
action_id);
return FALSE;
}
return TRUE;
}
gboolean
cd_main_mkdir_with_parents (const gchar *filename, GError **error)
{
/* ensure destination exists */
if (!g_file_test (filename, G_FILE_TEST_EXISTS)) {
g_autoptr(GFile) file = NULL;
file = g_file_new_for_path (filename);
return g_file_make_directory_with_parents (file, NULL, error);
}
return TRUE;
}
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