*
* Connection Manager
*
- * Copyright (C) 2012 BMW Car IT GbmH. All rights reserved.
+ * Copyright (C) 2012-2014 BMW Car IT GmbH.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
#include <string.h>
#include <sys/inotify.h>
#include <sys/stat.h>
+#include <sys/types.h>
+#include <pwd.h>
+#include <grp.h>
#include <glib.h>
#include <connman/dbus.h>
#include <connman/inotify.h>
+#include "src/shared/util.h"
+
#define POLICYDIR STORAGEDIR "/session_policy_local"
#define MODE (S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | \
static GHashTable *file_hash; /* (filename, policy_file) */
static GHashTable *session_hash; /* (connman_session, policy_config) */
-/* Global lookup table for mapping sessions to policies */
+/* Global lookup tables for mapping sessions to policies */
static GHashTable *selinux_hash; /* (lsm context, policy_group) */
-
-struct create_data {
- struct connman_session *session;
-};
+static GHashTable *uid_hash; /* (uid, policy_group) */
+static GHashTable *gid_hash; /* (gid, policy_group) */
/*
* A instance of struct policy_file is created per file in
struct policy_file {
/*
* A valid file is a keyfile with one ore more groups. All
- * groups are keept in this list.
+ * groups are kept in this list.
*/
GSList *groups;
};
struct policy_group {
char *selinux;
+ char *uid;
+ char *gid;
/*
* Each policy_group owns a config and is not shared with
/* A struct policy_config object is created and owned by a session. */
struct policy_config {
char *selinux;
+ char *selinux_context;
+ char *uid;
+ GSList *gids;
/* The policy config owned by the session */
struct connman_session_config *config;
/*
* SELinux combines Role-Based Access Control (RBAC), Type
- * Enforcment (TE) and optionally Multi-Level Security (MLS).
+ * Enforcement (TE) and optionally Multi-Level Security (MLS).
*
* When SELinux is enabled all processes and files are labeled
* with a contex that contains information such as user, role
*
* For identifyng application we (ab)using the type
* information. In the above example the haifux_exec_t type
- * will be transfered to haifux_t as defined in the domain
+ * will be transferred to haifux_t as defined in the domain
* transition and thus we are able to identify the application
* as haifux_t.
*/
return ident;
}
-static struct policy_config *create_policy(void)
+static void cleanup_config(gpointer user_data);
+
+static void finish_create(struct policy_config *policy,
+ connman_session_config_func_t cb,
+ void *user_data)
{
- struct policy_config *policy;
+ struct policy_group *group = NULL;
+ GSList *list;
- policy = g_new0(struct policy_config, 1);
+ if (policy->selinux)
+ group = g_hash_table_lookup(selinux_hash, policy->selinux);
- DBG("policy %p", policy);
+ if (group) {
+ set_policy(policy, group);
- policy->config = connman_session_create_default_config();
+ policy->config->id_type = CONNMAN_SESSION_ID_TYPE_LSM;
+ policy->config->id = g_strdup(policy->selinux_context);
+ goto done;
+ }
+
+ if (policy->uid)
+ group = g_hash_table_lookup(uid_hash, policy->uid);
+
+ if (group) {
+ set_policy(policy, group);
+
+ policy->config->id_type = CONNMAN_SESSION_ID_TYPE_UID;
+ policy->config->id = g_strdup(policy->uid);
+ goto done;
+ }
+
+ for (list = policy->gids; list; list = list->next) {
+ char *gid = list->data;
+
+ group = g_hash_table_lookup(gid_hash, gid);
+ if (!group)
+ continue;
+
+ set_policy(policy, group);
- return policy;
+ policy->config->id_type = CONNMAN_SESSION_ID_TYPE_GID;
+ policy->config->id = g_strdup(gid);
+ break;
+ }
+done:
+ g_hash_table_replace(session_hash, policy->session, policy);
+
+ (*cb)(policy->session, policy->config, user_data, 0);
+}
+
+static void failed_create(struct policy_config *policy,
+ connman_session_config_func_t cb,
+ void *user_data, int err)
+{
+ (*cb)(policy->session, NULL, user_data, err);
+
+ cleanup_config(policy);
}
static void selinux_context_reply(const unsigned char *context, void *user_data,
{
struct cb_data *cbd = user_data;
connman_session_config_func_t cb = cbd->cb;
- struct create_data *data = cbd->data;
- struct policy_config *policy;
- struct policy_group *group;
- struct connman_session_config *config = NULL;
+ struct policy_config *policy = cbd->data;
char *ident = NULL;
- DBG("session %p", data->session);
+ DBG("session %p", policy->session);
- if (err < 0)
+ if (err == -EIO) {
+ /* No SELinux support, drop back to UID/GID only mode */
+ finish_create(policy, cb, cbd->user_data);
goto done;
+ }
- DBG("SELinux context %s", context);
-
- ident = parse_selinux_type((const char*)context);
- if (ident == NULL) {
- err = -EINVAL;
+ if (err < 0) {
+ failed_create(policy, cb, cbd->user_data, err);
goto done;
}
- policy = create_policy();
- policy->selinux = g_strdup(ident);
- policy->session = data->session;
+ DBG("SELinux context %s", context);
- group = g_hash_table_lookup(selinux_hash, policy->selinux);
- if (group != NULL)
- set_policy(policy, group);
+ policy->selinux_context = g_strdup((const char *)context);
+ ident = parse_selinux_type(policy->selinux_context);
+ if (ident)
+ policy->selinux = g_strdup(ident);
- g_hash_table_replace(session_hash, data->session, policy);
- config = policy->config;
+ finish_create(policy, cb, cbd->user_data);
done:
- (*cb)(data->session, config, cbd->user_data, err);
-
g_free(cbd);
- g_free(data);
g_free(ident);
}
+static void get_uid_reply(unsigned int uid, void *user_data, int err)
+{
+ struct cb_data *cbd = user_data;
+ connman_session_config_func_t cb = cbd->cb;
+ struct policy_config *policy = cbd->data;
+ const char *owner;
+ struct passwd *pwd;
+ struct group *grp;
+ gid_t *groups = NULL;
+ int nrgroups, i;
+
+ DBG("session %p uid %d", policy->session, uid);
+
+ if (err < 0)
+ goto err;
+
+ pwd = getpwuid((uid_t)uid);
+ if (!pwd) {
+ if (errno != 0)
+ err = -errno;
+ else
+ err = -EINVAL;
+ goto err;
+ }
+
+ policy->uid = g_strdup(pwd->pw_name);
+
+ nrgroups = 0;
+ getgrouplist(pwd->pw_name, pwd->pw_gid, NULL, &nrgroups);
+ groups = g_try_new0(gid_t, nrgroups);
+ if (!groups) {
+ err = -ENOMEM;
+ goto err;
+ }
+
+ err = getgrouplist(pwd->pw_name, pwd->pw_gid, groups, &nrgroups);
+ if (err < 0)
+ goto err;
+
+ for (i = 0; i < nrgroups; i++) {
+ grp = getgrgid(groups[i]);
+ if (!grp) {
+ if (errno != 0)
+ err = -errno;
+ else
+ err = -EINVAL;
+ goto err;
+ }
+
+ policy->gids = g_slist_prepend(policy->gids,
+ g_strdup(grp->gr_name));
+ }
+ g_free(groups);
+
+ owner = connman_session_get_owner(policy->session);
+
+ err = connman_dbus_get_selinux_context(connection, owner,
+ selinux_context_reply, cbd);
+ if (err == 0) {
+ /*
+ * We are able to ask for a SELinux context. Let's defer the
+ * creation of the session config until we get the answer
+ * from D-Bus.
+ */
+ return;
+ }
+
+ finish_create(policy, cb, cbd->user_data);
+ g_free(cbd);
+
+ return;
+
+err:
+ failed_create(policy, cb, cbd->user_data, err);
+ g_free(cbd);
+ g_free(groups);
+}
+
static int policy_local_create(struct connman_session *session,
connman_session_config_func_t cb,
void *user_data)
{
struct cb_data *cbd = cb_data_new(cb, user_data);
- struct create_data *data;
+ struct policy_config *policy;
const char *owner;
int err;
DBG("session %p", session);
- data = g_new0(struct create_data, 1);
- cbd->data = data;
+ policy = g_new0(struct policy_config, 1);
+ policy->config = connman_session_create_default_config();
+ policy->session = session;
- data->session = session;
+ cbd->data = policy;
owner = connman_session_get_owner(session);
- err = connman_dbus_get_selinux_context(connection, owner,
- selinux_context_reply,
- cbd);
+ err = connman_dbus_get_connection_unix_user(connection, owner,
+ get_uid_reply, cbd);
if (err < 0) {
- connman_error("Could not get SELinux context");
- g_free(data);
+ connman_error("Could not get UID");
+ cleanup_config(policy);
g_free(cbd);
return err;
}
DBG("session %p", session);
policy = g_hash_table_lookup(session_hash, session);
- if (policy == NULL)
+ if (!policy)
return;
g_hash_table_remove(session_hash, session);
*keyfile = g_key_file_new();
- if (g_key_file_load_from_file(*keyfile, pathname, 0, &error) == FALSE)
+ if (!g_key_file_load_from_file(*keyfile, pathname, 0, &error))
goto err;
return 0;
group->selinux = g_key_file_get_string(keyfile, groupname,
"selinux", NULL);
- if (group->selinux == NULL)
+
+ group->gid = g_key_file_get_string(keyfile, groupname,
+ "gid", NULL);
+
+ group->uid = g_key_file_get_string(keyfile, groupname,
+ "uid", NULL);
+
+ if (!group->selinux && !group->gid && !group->uid)
return -EINVAL;
config->priority = g_key_file_get_boolean(keyfile, groupname,
str = g_key_file_get_string(keyfile, groupname, "RoamingPolicy",
NULL);
- if (str != NULL) {
+ if (str) {
config->roaming_policy = connman_session_parse_roaming_policy(str);
g_free(str);
}
str = g_key_file_get_string(keyfile, groupname, "ConnectionType",
NULL);
- if (str != NULL) {
+ if (str) {
config->type = connman_session_parse_connection_type(str);
g_free(str);
}
str = g_key_file_get_string(keyfile, groupname, "AllowedBearers",
NULL);
- if (str != NULL) {
+ if (str) {
+ g_slist_free(config->allowed_bearers);
+ config->allowed_bearers = NULL;
tokens = g_strsplit(str, " ", 0);
- for (i = 0; tokens[i] != NULL; i++) {
+ for (i = 0; tokens[i]; i++) {
err = connman_session_parse_bearers(tokens[i],
&config->allowed_bearers);
if (err < 0)
g_strfreev(tokens);
}
- DBG("group %p selinux %s", group, group->selinux);
+ DBG("group %p selinux %s uid %s gid %s", group, group->selinux,
+ group->uid, group->gid);
return err;
}
+
static void update_session(struct policy_config *policy)
{
DBG("policy %p session %p", policy, policy->session);
- if (policy->session == NULL)
+ if (!policy->session)
return;
if (connman_session_config_update(policy->session) < 0)
DBG("policy %p group %p", policy, policy->group);
- if (policy->group != NULL)
+ if (policy->group)
policy->group->sessions =
g_slist_remove(policy->group->sessions, policy);
g_slist_free(policy->config->allowed_bearers);
+ g_free(policy->config->id);
g_free(policy->config);
+ g_free(policy->selinux_context);
g_free(policy->selinux);
+ g_free(policy->uid);
+ g_slist_free_full(policy->gids, g_free);
g_free(policy);
}
g_slist_free_full(group->sessions, set_default_config);
g_slist_free(group->config->allowed_bearers);
+ g_free(group->config->id);
g_free(group->config);
- if (group->selinux != NULL)
+ if (group->selinux)
g_hash_table_remove(selinux_hash, group->selinux);
+ if (group->uid)
+ g_hash_table_remove(uid_hash, group->uid);
+ if (group->gid)
+ g_hash_table_remove(gid_hash, group->gid);
g_free(group->selinux);
+ g_free(group->uid);
+ g_free(group->gid);
g_free(group);
}
GHashTableIter iter;
gpointer value, key;
struct policy_group *group = NULL;
+ GSList *list;
g_hash_table_iter_init(&iter, session_hash);
- while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
+ while (g_hash_table_iter_next(&iter, &key, &value)) {
struct policy_config *policy = value;
- if (policy->group != NULL)
+ if (policy->group)
continue;
- group = g_hash_table_lookup(selinux_hash, policy->selinux);
- if (group != NULL) {
+ if (policy->selinux)
+ group = g_hash_table_lookup(selinux_hash,
+ policy->selinux);
+ if (group) {
+ policy->config->id_type = CONNMAN_SESSION_ID_TYPE_LSM;
+ g_free(policy->config->id);
+ policy->config->id = g_strdup(policy->selinux_context);
+ update_session(policy);
+ continue;
+ }
+
+ group = g_hash_table_lookup(uid_hash, policy->uid);
+ if (group) {
set_policy(policy, group);
+
+ policy->config->id_type = CONNMAN_SESSION_ID_TYPE_UID;
+ g_free(policy->config->id);
+ policy->config->id = g_strdup(policy->uid);
update_session(policy);
+ continue;
+ }
+
+ for (list = policy->gids; list; list = list->next) {
+ char *gid = list->data;
+ group = g_hash_table_lookup(gid_hash, gid);
+ if (group) {
+ set_policy(policy, group);
+
+ policy->config->id_type = CONNMAN_SESSION_ID_TYPE_GID;
+ g_free(policy->config->id);
+ policy->config->id = g_strdup(gid);
+ update_session(policy);
+ }
}
}
}
groupnames = g_key_file_get_groups(keyfile, NULL);
- for (i = 0; groupnames[i] != NULL; i++) {
+ for (i = 0; groupnames[i]; i++) {
group = g_new0(struct policy_group, 1);
- group->config = g_new0(struct connman_session_config, 1);
+ group->config = connman_session_create_default_config();
err = load_policy(keyfile, groupnames[i], group);
if (err < 0) {
g_free(group);
break;
}
- g_hash_table_replace(selinux_hash, group->selinux, group);
+ if (group->selinux)
+ g_hash_table_replace(selinux_hash, group->selinux, group);
+
+ if (group->uid)
+ g_hash_table_replace(uid_hash, group->uid, group);
+
+ if (group->gid)
+ g_hash_table_replace(gid_hash, group->gid, group);
file->groups = g_slist_prepend(file->groups, group);
}
return err;
}
-static connman_bool_t is_filename_valid(const char *filename)
+static bool is_filename_valid(const char *filename)
{
- if (filename == NULL)
- return FALSE;
+ if (!filename)
+ return false;
if (filename[0] == '.')
- return FALSE;
+ return false;
return g_str_has_suffix(filename, ".policy");
}
-static int read_policies()
+static int read_policies(void)
{
GDir *dir;
const gchar *filename;
DBG("");
dir = g_dir_open(POLICYDIR, 0, NULL);
- if (dir == NULL)
+ if (!dir)
return -EINVAL;
- while ((filename = g_dir_read_name(dir)) != NULL) {
- if (is_filename_valid(filename) == FALSE)
+ while ((filename = g_dir_read_name(dir))) {
+ if (!is_filename_valid(filename))
continue;
file = g_new0(struct policy_file, 1);
if (event->mask & IN_CREATE)
return;
- if (is_filename_valid(filename) == FALSE)
+ if (!is_filename_valid(filename))
return;
/*
DBG("");
/* If the dir doesn't exist, create it */
- if (g_file_test(POLICYDIR, G_FILE_TEST_IS_DIR) == FALSE) {
+ if (!g_file_test(POLICYDIR, G_FILE_TEST_IS_DIR)) {
if (mkdir(POLICYDIR, MODE) < 0) {
if (errno != EEXIST)
return -errno;
}
connection = connman_dbus_get_connection();
- if (connection == NULL)
+ if (!connection)
return -EIO;
file_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
NULL, cleanup_config);
selinux_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
NULL, NULL);
+ uid_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
+ NULL, NULL);
+ gid_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
+ NULL, NULL);
err = connman_inotify_register(POLICYDIR, notify_handler);
if (err < 0)
connman_inotify_unregister(POLICYDIR, notify_handler);
err:
- if (file_hash != NULL)
+ if (file_hash)
g_hash_table_destroy(file_hash);
- if (session_hash != NULL)
+ if (session_hash)
g_hash_table_destroy(session_hash);
- if (selinux_hash != NULL)
+ if (selinux_hash)
g_hash_table_destroy(selinux_hash);
+ if (uid_hash)
+ g_hash_table_destroy(uid_hash);
+
+ if (gid_hash)
+ g_hash_table_destroy(gid_hash);
+
connman_session_policy_unregister(&session_policy_local);
dbus_connection_unref(connection);
g_hash_table_destroy(file_hash);
g_hash_table_destroy(session_hash);
g_hash_table_destroy(selinux_hash);
+ g_hash_table_destroy(uid_hash);
+ g_hash_table_destroy(gid_hash);
connman_session_policy_unregister(&session_policy_local);
projects / platform / upstream / connman.git / blobdiff