diff options
Diffstat (limited to 'src/shared/polkit.c')
| -rw-r--r-- | src/shared/polkit.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/src/shared/polkit.c b/src/shared/polkit.c new file mode 100644 index 0000000000..126096e64f --- /dev/null +++ b/src/shared/polkit.c @@ -0,0 +1,163 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <sys/types.h> + +#include <errno.h> + +#include "util.h" +#include "dbus-common.h" +#include "polkit.h" + +int verify_polkit( + DBusConnection *c, + DBusMessage *request, + const char *action, + bool interactive, + bool *_challenge, + DBusError *error) { + + DBusMessage *m = NULL, *reply = NULL; + const char *unix_process = "unix-process", *pid = "pid", *starttime = "start-time", *cancel_id = ""; + const char *sender; + uint32_t flags = interactive ? 1 : 0; + pid_t pid_raw; + uint32_t pid_u32; + unsigned long long starttime_raw; + uint64_t starttime_u64; + DBusMessageIter iter_msg, iter_struct, iter_array, iter_dict, iter_variant; + int r; + dbus_bool_t authorized = FALSE, challenge = FALSE; + unsigned long ul; + + assert(c); + assert(request); + + sender = dbus_message_get_sender(request); + if (!sender) + return -EINVAL; + + ul = dbus_bus_get_unix_user(c, sender, error); + if (ul == (unsigned long) -1) + return -EINVAL; + + /* Shortcut things for root, to avoid the PK roundtrip and dependency */ + if (ul == 0) + return 1; + + pid_raw = bus_get_unix_process_id(c, sender, error); + if (pid_raw == 0) + return -EINVAL; + + r = get_starttime_of_pid(pid_raw, &starttime_raw); + if (r < 0) + return r; + + m = dbus_message_new_method_call( + "org.freedesktop.PolicyKit1", + "/org/freedesktop/PolicyKit1/Authority", + "org.freedesktop.PolicyKit1.Authority", + "CheckAuthorization"); + if (!m) + return -ENOMEM; + + dbus_message_iter_init_append(m, &iter_msg); + + pid_u32 = (uint32_t) pid_raw; + starttime_u64 = (uint64_t) starttime_raw; + + if (!dbus_message_iter_open_container(&iter_msg, DBUS_TYPE_STRUCT, NULL, &iter_struct) || + !dbus_message_iter_append_basic(&iter_struct, DBUS_TYPE_STRING, &unix_process) || + !dbus_message_iter_open_container(&iter_struct, DBUS_TYPE_ARRAY, "{sv}", &iter_array) || + !dbus_message_iter_open_container(&iter_array, DBUS_TYPE_DICT_ENTRY, NULL, &iter_dict) || + !dbus_message_iter_append_basic(&iter_dict, DBUS_TYPE_STRING, &pid) || + !dbus_message_iter_open_container(&iter_dict, DBUS_TYPE_VARIANT, "u", &iter_variant) || + !dbus_message_iter_append_basic(&iter_variant, DBUS_TYPE_UINT32, &pid_u32) || + !dbus_message_iter_close_container(&iter_dict, &iter_variant) || + !dbus_message_iter_close_container(&iter_array, &iter_dict) || + !dbus_message_iter_open_container(&iter_array, DBUS_TYPE_DICT_ENTRY, NULL, &iter_dict) || + !dbus_message_iter_append_basic(&iter_dict, DBUS_TYPE_STRING, &starttime) || + !dbus_message_iter_open_container(&iter_dict, DBUS_TYPE_VARIANT, "t", &iter_variant) || + !dbus_message_iter_append_basic(&iter_variant, DBUS_TYPE_UINT64, &starttime_u64) || + !dbus_message_iter_close_container(&iter_dict, &iter_variant) || + !dbus_message_iter_close_container(&iter_array, &iter_dict) || + !dbus_message_iter_close_container(&iter_struct, &iter_array) || + !dbus_message_iter_close_container(&iter_msg, &iter_struct) || + !dbus_message_iter_append_basic(&iter_msg, DBUS_TYPE_STRING, &action) || + !dbus_message_iter_open_container(&iter_msg, DBUS_TYPE_ARRAY, "{ss}", &iter_array) || + !dbus_message_iter_close_container(&iter_msg, &iter_array) || + !dbus_message_iter_append_basic(&iter_msg, DBUS_TYPE_UINT32, &flags) || + !dbus_message_iter_append_basic(&iter_msg, DBUS_TYPE_STRING, &cancel_id)) { + r = -ENOMEM; + goto finish; + } + + reply = dbus_connection_send_with_reply_and_block(c, m, -1, error); + if (!reply) { + r = -EIO; + goto finish; + } + + if (dbus_set_error_from_message(error, reply)) { + r = -EIO; + goto finish; + } + + if (!dbus_message_iter_init(reply, &iter_msg) || + dbus_message_iter_get_arg_type(&iter_msg) != DBUS_TYPE_STRUCT) { + r = -EIO; + goto finish; + } + + dbus_message_iter_recurse(&iter_msg, &iter_struct); + + if (dbus_message_iter_get_arg_type(&iter_struct) != DBUS_TYPE_BOOLEAN) { + r = -EIO; + goto finish; + } + + dbus_message_iter_get_basic(&iter_struct, &authorized); + + if (!dbus_message_iter_next(&iter_struct) || + dbus_message_iter_get_arg_type(&iter_struct) != DBUS_TYPE_BOOLEAN) { + r = -EIO; + goto finish; + } + + dbus_message_iter_get_basic(&iter_struct, &challenge); + + if (authorized) + r = 1; + else if (_challenge) { + *_challenge = !!challenge; + r = 0; + } else + r = -EPERM; + +finish: + if (m) + dbus_message_unref(m); + + if (reply) + dbus_message_unref(reply); + + return r; +} |