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/*
* Copyright © 2020 Collabora, Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "ivi-compositor.h"
#include "policy.h"
#ifdef HAVE_SMACK
#include <sys/smack.h>
#endif
#include <string.h>
#include "shared/helpers.h"
#ifdef HAVE_SMACK
static const char *const bind_agl_shell[] = {
"User::App::homescreen",
"User::App::cluster-gauges" /* cluster-dashboard */
};
static const char *const bind_agl_shell_desktop[] = {
"User::App::launcher",
"User::App::alexa-viewer",
"User::App::tbtnavi",
"User::App::hvac",
"User::App::xdg-cluster-receiver", /* cluster-receiver, native XDG app*/
"User::App::cluster-receiver" /* cluster-receiver, Qt app */
};
#endif
static const char *const applications_permitted[] = {
"homescreen", "alexa-viewer", "launcher", "hvac",
"navigation", "mediaplayer"
};
/* helper start searches the applications_permitted for the
* app_id
*/
static bool
ivi_policy_verify_permitted_app(const char *app_id)
{
for (size_t i = 0; i < ARRAY_LENGTH(applications_permitted); i++)
if (strcmp(app_id, applications_permitted[i]) == 0)
return true;
return false;
}
#ifdef HAVE_SMACK
/* helper to determine which applications are allowed to bind to the
* private extensions
*/
static bool
ivi_policy_check_bind_agl_shell(const char *app_id)
{
for (size_t i = 0; i < ARRAY_LENGTH(bind_agl_shell); i++)
if (strcmp(app_id, bind_agl_shell[i]) == 0)
return true;
return false;
}
static bool
ivi_policy_check_bind_agl_shell_desktop(const char *app_id)
{
for (size_t i = 0; i < ARRAY_LENGTH(bind_agl_shell_desktop); i++)
if (strcmp(app_id, bind_agl_shell_desktop[i]) == 0)
return true;
return false;
}
#endif
static bool
ivi_policy_verify_ivi_surface(struct ivi_surface *surf)
{
const char *app_id = weston_desktop_surface_get_app_id(surf->dsurface);
return ivi_policy_verify_permitted_app(app_id);
}
/*
* deny-all policy implementation allows every action to be denied
*
* This is an example, that implements the API
*
* For injecting rules back in the compositor one should use ivi_policy_add()
* - policy_rule_allow_to_add is required in order to add further policy rules
* - policy_rule_try_event will be callback executed when handling the state
* change
*/
static bool
ivi_policy_default_surface_create(struct ivi_surface *surf, void *user_data)
{
return ivi_policy_verify_ivi_surface(surf);
}
static bool
ivi_policy_default_surface_commmited(struct ivi_surface *surf, void *user_data)
{
return ivi_policy_verify_ivi_surface(surf);
}
static bool
ivi_policy_default_surface_activate(struct ivi_surface *surf, void *user_data)
{
return ivi_policy_verify_ivi_surface(surf);
}
static bool
ivi_policy_default_surface_deactivate(struct ivi_surface *surf, void *user_data)
{
return ivi_policy_verify_ivi_surface(surf);
}
static bool
ivi_policy_default_surface_activate_default(struct ivi_surface *surf, void *user_data)
{
return ivi_policy_verify_ivi_surface(surf);
}
static bool
ivi_policy_default_surface_advertise_state_change(struct ivi_surface *surf, void *user_data)
{
return ivi_policy_verify_ivi_surface(surf);
}
#ifdef HAVE_SMACK
static bool
ivi_policy_default_shell_bind_interface(void *client, void *interface)
{
struct wl_interface *shell_interface = interface;
struct wl_client *conn_client = client;
pid_t pid, uid, gid;
int client_fd;
char *label;
bool ret = false;
wl_client_get_credentials(conn_client, &pid, &uid, &gid);
client_fd = wl_client_get_fd(conn_client);
if (smack_new_label_from_socket(client_fd, &label) < 0) {
return ret;
}
if (strcmp(shell_interface->name, "agl_shell") == 0)
ret = ivi_policy_check_bind_agl_shell(label);
if (strcmp(shell_interface->name, "agl_shell_desktop") == 0)
ret = ivi_policy_check_bind_agl_shell_desktop(label);
if (ret)
weston_log("Client with pid %d, uid %d, gid %d, allowed "
"to bind to %s for label %s\n", pid, uid, gid,
shell_interface->name, label);
/* client responsible for free'ing */
free(label);
return ret;
}
#else
static bool
ivi_policy_default_shell_bind_interface(void *client, void *interface)
{
return false;
}
#endif
static bool
ivi_policy_default_allow_to_add(void *user_data)
{
/* verify that policy rules can be added with ivi_policy_add() */
return true;
}
/*
* Policy rules added by ivi_policy_add() will be handled by this callback, and
* should be treated depending on the event. Note this is just an example.
*/
static void
ivi_policy_default_try_event(struct ivi_a_policy *a_policy)
{
uint32_t event = a_policy->event;
switch (event) {
case AGL_SHELL_POLICY_EVENT_SHOW:
ivi_layout_activate(a_policy->output, a_policy->app_id);
break;
case AGL_SHELL_POLICY_EVENT_HIDE:
ivi_layout_deactivate(a_policy->policy->ivi, a_policy->app_id);
default:
break;
}
}
static const struct ivi_policy_api policy_api = {
.struct_size = sizeof(policy_api),
.surface_create = ivi_policy_default_surface_create,
.surface_commited = ivi_policy_default_surface_commmited,
.surface_activate = ivi_policy_default_surface_activate,
.surface_deactivate = ivi_policy_default_surface_deactivate,
.surface_activate_by_default = ivi_policy_default_surface_activate_default,
.surface_advertise_state_change = ivi_policy_default_surface_advertise_state_change,
.shell_bind_interface = ivi_policy_default_shell_bind_interface,
.policy_rule_allow_to_add = ivi_policy_default_allow_to_add,
.policy_rule_try_event = ivi_policy_default_try_event,
};
int
ivi_policy_init(struct ivi_compositor *ivi)
{
ivi->policy = ivi_policy_create(ivi, &policy_api, ivi);
if (!ivi->policy)
return -1;
weston_log("Installing 'deny-all' policy engine\n");
return 0;
}
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