mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2025-11-04 13:30:12 -05:00
4cf59e3953
Rework the access checks. Add owner field to more objects to do access control checks Make sure the object global is set in the object before signaling the new global.
132 lines
3.4 KiB
C
132 lines
3.4 KiB
C
/* Pinos
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* Copyright (C) 2016 Wim Taymans <wim.taymans@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include <string.h>
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#include <stdio.h>
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#include <errno.h>
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#include "config.h"
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#include "pinos/server/core.h"
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#include "pinos/server/module.h"
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typedef struct {
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PinosCore *core;
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PinosProperties *properties;
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PinosListener check_send;
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PinosListener check_dispatch;
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} ModuleImpl;
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static bool
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check_global_owner (PinosCore *core,
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PinosClient *client,
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PinosGlobal *global)
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{
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pinos_log_debug ("%p", global);
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if (global == NULL)
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return false;
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pinos_log_debug ("%p", global->owner);
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if (global->owner == NULL)
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return true;
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pinos_log_debug ("%d %d", global->owner->ucred.uid, client->ucred.uid);
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if (global->owner->ucred.uid == client->ucred.uid)
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return true;
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return false;
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}
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static SpaResult
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do_check_global (PinosAccess *access,
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PinosClient *client,
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PinosGlobal *global)
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{
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if (global->type == client->core->type.link) {
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PinosLink *link = global->object;
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pinos_log_debug ("link %p: global %p %p %p %p", link, global->owner, client, link->output, link->input);
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/* we must be able to see both nodes */
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if (link->output && !check_global_owner (client->core, client, link->output->node->global))
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return SPA_RESULT_ERROR;
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pinos_log_debug ("link %p: global %p %p %p %p", link, global->owner, client, link->output, link->input);
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if (link->input && !check_global_owner (client->core, client, link->input->node->global))
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return SPA_RESULT_ERROR;
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pinos_log_debug ("link %p: global %p %p %p %p", link, global->owner, client, link->output, link->input);
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}
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else if (!check_global_owner (client->core, client, global))
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return SPA_RESULT_ERROR;
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return SPA_RESULT_OK;
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}
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static PinosAccess access_checks =
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{
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do_check_global,
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};
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static ModuleImpl *
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module_new (PinosCore *core,
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PinosProperties *properties)
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{
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ModuleImpl *impl;
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impl = calloc (1, sizeof (ModuleImpl));
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pinos_log_debug ("module %p: new", impl);
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impl->core = core;
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impl->properties = properties;
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core->access = &access_checks;
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return impl;
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}
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#if 0
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static void
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module_destroy (ModuleImpl *impl)
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{
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pinos_log_debug ("module %p: destroy", impl);
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pinos_global_destroy (impl->global);
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pinos_signal_remove (&impl->global_added);
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pinos_signal_remove (&impl->global_removed);
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pinos_signal_remove (&impl->port_added);
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pinos_signal_remove (&impl->port_removed);
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pinos_signal_remove (&impl->port_unlinked);
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pinos_signal_remove (&impl->link_state_changed);
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free (impl);
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}
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#endif
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bool
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pinos__module_init (PinosModule * module, const char * args)
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{
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module_new (module->core, NULL);
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return true;
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}
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