+++ /dev/null
-From b6854927aaf5e5970178ed9b0c6647bb759f2092 Mon Sep 17 00:00:00 2001
-From: George Kiagiadakis <george.kiagiadakis@collabora.com>
-Date: Tue, 16 Feb 2021 17:26:20 +0200
-Subject: [PATCH] modules: add new access-seclabel module
-
-This module allows access control based on the security label
-of the client. It is tailored for use with the semantics of SMACK
-
-Upstream-Status: Inappropriate [smack specific]
-
----
- src/modules/meson.build | 10 ++
- src/modules/module-access-seclabel.c | 220 +++++++++++++++++++++++++++
- 2 files changed, 230 insertions(+)
- create mode 100644 src/modules/module-access-seclabel.c
-
-diff --git a/src/modules/meson.build b/src/modules/meson.build
-index f51aa29c..21b52d49 100644
---- a/src/modules/meson.build
-+++ b/src/modules/meson.build
-@@ -56,6 +56,16 @@ pipewire_module_echo_cancel = shared_library('pipewire-module-echo-cancel',
- dependencies : [mathlib, dl_lib, pipewire_dep, webrtc_dep],
- )
-
-+pipewire_module_access_seclabel = shared_library('pipewire-module-access-seclabel',
-+ [ 'module-access-seclabel.c' ],
-+ c_args : pipewire_module_c_args,
-+ include_directories : [configinc, spa_inc],
-+ install : true,
-+ install_dir : modules_install_dir,
-+ install_rpath: modules_install_dir,
-+ dependencies : [mathlib, dl_lib, pipewire_dep],
-+)
-+
- pipewire_module_profiler = shared_library('pipewire-module-profiler',
- [ 'module-profiler.c',
- 'module-profiler/protocol-native.c', ],
-diff --git a/src/modules/module-access-seclabel.c b/src/modules/module-access-seclabel.c
-new file mode 100644
-index 00000000..3739f2e4
---- /dev/null
-+++ b/src/modules/module-access-seclabel.c
-@@ -0,0 +1,220 @@
-+/* PipeWire
-+ *
-+ * Copyright © 2018 Wim Taymans
-+ * Copyright © 2021 Collabora Ltd.
-+ * @author George Kiagiadakis <george.kiagiadakis@collabora.com>
-+ *
-+ * 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 <string.h>
-+#include <stdio.h>
-+#include <errno.h>
-+#include <sys/types.h>
-+#include <sys/stat.h>
-+#include <sys/vfs.h>
-+#include <fcntl.h>
-+#include <unistd.h>
-+
-+#include "config.h"
-+
-+#include <spa/utils/result.h>
-+#include <spa/utils/json.h>
-+
-+#include <pipewire/impl.h>
-+#include <pipewire/private.h>
-+
-+#define NAME "access-seclabel"
-+
-+#define MODULE_USAGE "[ seclabel.allowed=<cmd-line> ] " \
-+ "[ seclabel.rejected=<cmd-line> ] " \
-+ "[ seclabel.restricted=<cmd-line> ] " \
-+
-+static const struct spa_dict_item module_props[] = {
-+ { PW_KEY_MODULE_AUTHOR, "George Kiagiadakis <george.kiagiadakis@collabora.com>" },
-+ { PW_KEY_MODULE_DESCRIPTION, "Perform access check based on the security label" },
-+ { PW_KEY_MODULE_USAGE, MODULE_USAGE },
-+ { PW_KEY_MODULE_VERSION, PACKAGE_VERSION },
-+};
-+
-+struct impl {
-+ struct pw_context *context;
-+ struct pw_properties *properties;
-+
-+ struct spa_hook context_listener;
-+ struct spa_hook module_listener;
-+};
-+
-+static int check_label(const char *label, const char *str)
-+{
-+ char key[1024];
-+ int res = 0;
-+ struct spa_json it[2];
-+
-+ spa_json_init(&it[0], str, strlen(str));
-+ if ((res = spa_json_enter_array(&it[0], &it[1])) <= 0)
-+ goto exit;
-+
-+ res = 0;
-+ while (spa_json_get_string(&it[1], key, sizeof(key)) > 0) {
-+ if (strcmp(label, key) == 0) {
-+ res = 1;
-+ break;
-+ }
-+ }
-+exit:
-+ return res;
-+}
-+
-+static void
-+context_check_access(void *data, struct pw_impl_client *client)
-+{
-+ struct impl *impl = data;
-+ struct pw_permission permissions[1];
-+ struct spa_dict_item items[2];
-+ const struct pw_properties *props;
-+ const char *str, *access, *label = NULL;
-+ int res;
-+
-+ if ((props = pw_impl_client_get_properties(client)) != NULL) {
-+ if ((str = pw_properties_get(props, PW_KEY_ACCESS)) != NULL) {
-+ pw_log_info(NAME " client %p: has already access: '%s'", client, str);
-+ return;
-+ }
-+ label = pw_properties_get(props, PW_KEY_SEC_LABEL);
-+ }
-+
-+ if (!label) {
-+ pw_log_info(NAME " client %p: has no security label", client);
-+ return;
-+ }
-+
-+ if (impl->properties && (str = pw_properties_get(impl->properties, "seclabel.allowed")) != NULL) {
-+ res = check_label(label, str);
-+ if (res < 0) {
-+ pw_log_warn(NAME" %p: client %p allowed check failed: %s",
-+ impl, client, spa_strerror(res));
-+ } else if (res > 0) {
-+ access = "allowed";
-+ goto granted;
-+ }
-+ }
-+
-+ if (impl->properties && (str = pw_properties_get(impl->properties, "seclabel.rejected")) != NULL) {
-+ res = check_label(label, str);
-+ if (res < 0) {
-+ pw_log_warn(NAME" %p: client %p rejected check failed: %s",
-+ impl, client, spa_strerror(res));
-+ } else if (res > 0) {
-+ res = -EACCES;
-+ access = "rejected";
-+ goto rejected;
-+ }
-+ }
-+
-+ if (impl->properties && (str = pw_properties_get(impl->properties, "seclabel.restricted")) != NULL) {
-+ res = check_label(label, str);
-+ if (res < 0) {
-+ pw_log_warn(NAME" %p: client %p restricted check failed: %s",
-+ impl, client, spa_strerror(res));
-+ }
-+ else if (res > 0) {
-+ pw_log_debug(NAME" %p: restricted client %p added", impl, client);
-+ access = "restricted";
-+ goto wait_permissions;
-+ }
-+ }
-+
-+ return;
-+
-+granted:
-+ pw_log_info(NAME" %p: client %p '%s' access granted", impl, client, access);
-+ items[0] = SPA_DICT_ITEM_INIT(PW_KEY_ACCESS, access);
-+ pw_impl_client_update_properties(client, &SPA_DICT_INIT(items, 1));
-+
-+ permissions[0] = PW_PERMISSION_INIT(PW_ID_ANY, PW_PERM_ALL);
-+ pw_impl_client_update_permissions(client, 1, permissions);
-+ return;
-+
-+wait_permissions:
-+ pw_log_info(NAME " %p: client %p wait for '%s' permissions",
-+ impl, client, access);
-+ items[0] = SPA_DICT_ITEM_INIT(PW_KEY_ACCESS, access);
-+ pw_impl_client_update_properties(client, &SPA_DICT_INIT(items, 1));
-+ return;
-+
-+rejected:
-+ pw_resource_error(pw_impl_client_get_core_resource(client), res, access);
-+ items[0] = SPA_DICT_ITEM_INIT(PW_KEY_ACCESS, access);
-+ pw_impl_client_update_properties(client, &SPA_DICT_INIT(items, 1));
-+ return;
-+}
-+
-+static const struct pw_context_events context_events = {
-+ PW_VERSION_CONTEXT_EVENTS,
-+ .check_access = context_check_access,
-+};
-+
-+static void module_destroy(void *data)
-+{
-+ struct impl *impl = data;
-+
-+ spa_hook_remove(&impl->context_listener);
-+ spa_hook_remove(&impl->module_listener);
-+
-+ if (impl->properties)
-+ pw_properties_free(impl->properties);
-+
-+ free(impl);
-+}
-+
-+static const struct pw_impl_module_events module_events = {
-+ PW_VERSION_IMPL_MODULE_EVENTS,
-+ .destroy = module_destroy,
-+};
-+
-+SPA_EXPORT
-+int pipewire__module_init(struct pw_impl_module *module, const char *args)
-+{
-+ struct pw_context *context = pw_impl_module_get_context(module);
-+ struct pw_properties *props;
-+ struct impl *impl;
-+
-+ impl = calloc(1, sizeof(struct impl));
-+ if (impl == NULL)
-+ return -errno;
-+
-+ pw_log_debug(NAME" module %p: new %s", impl, args);
-+
-+ if (args)
-+ props = pw_properties_new_string(args);
-+ else
-+ props = NULL;
-+
-+ impl->context = context;
-+ impl->properties = props;
-+
-+ pw_context_add_listener(context, &impl->context_listener, &context_events, impl);
-+ pw_impl_module_add_listener(module, &impl->module_listener, &module_events, impl);
-+
-+ pw_impl_module_update_properties(module, &SPA_DICT_INIT_ARRAY(module_props));
-+
-+ return 0;
-+}
Code Review / AGL / meta-agl.git / blobdiff