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authorLuke Shumaker <lukeshu@sbcglobal.net>2016-06-07 02:41:53 -0400
committerLuke Shumaker <lukeshu@sbcglobal.net>2016-06-07 02:41:53 -0400
commit08c9455b72ee4051054f4f44d979710835b5385c (patch)
tree068df4ab6c918ce1bd0912aff26206553c02c66b /src/libbus-proxy-core
parent20b308757e1bdf62160f861d04a9732514013d0f (diff)
./move.sh
Diffstat (limited to 'src/libbus-proxy-core')
-rw-r--r--src/libbus-proxy-core/Makefile42
-rw-r--r--src/libbus-proxy-core/bus-xml-policy.c1327
-rw-r--r--src/libbus-proxy-core/bus-xml-policy.h147
-rw-r--r--src/libbus-proxy-core/driver.c745
-rw-r--r--src/libbus-proxy-core/driver.h27
-rw-r--r--src/libbus-proxy-core/proxy.c953
-rw-r--r--src/libbus-proxy-core/proxy.h66
-rw-r--r--src/libbus-proxy-core/synthesize.c225
-rw-r--r--src/libbus-proxy-core/synthesize.h36
-rw-r--r--src/libbus-proxy-core/test-bus-xml-policy.c170
10 files changed, 3738 insertions, 0 deletions
diff --git a/src/libbus-proxy-core/Makefile b/src/libbus-proxy-core/Makefile
new file mode 100644
index 0000000000..f3cf4a055f
--- /dev/null
+++ b/src/libbus-proxy-core/Makefile
@@ -0,0 +1,42 @@
+# -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+# This file is part of systemd.
+#
+# Copyright 2010-2012 Lennart Poettering
+# Copyright 2010-2012 Kay Sievers
+# Copyright 2013 Zbigniew Jędrzejewski-Szmek
+# Copyright 2013 David Strauss
+# Copyright 2016 Luke Shumaker
+#
+# 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 $(dir $(lastword $(MAKEFILE_LIST)))/../../config.mk
+include $(topsrcdir)/build-aux/Makefile.head.mk
+
+noinst_LTLIBRARIES += \
+ libbus-proxy-core.la
+
+libbus_proxy_core_la_SOURCES = \
+ src/bus-proxyd/bus-xml-policy.c \
+ src/bus-proxyd/bus-xml-policy.h \
+ src/bus-proxyd/driver.c \
+ src/bus-proxyd/driver.h \
+ src/bus-proxyd/proxy.c \
+ src/bus-proxyd/proxy.h \
+ src/bus-proxyd/synthesize.c \
+ src/bus-proxyd/synthesize.h
+
+libbus_proxy_core_la_LIBADD = \
+ libshared.la
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/libbus-proxy-core/bus-xml-policy.c b/src/libbus-proxy-core/bus-xml-policy.c
new file mode 100644
index 0000000000..86a8362142
--- /dev/null
+++ b/src/libbus-proxy-core/bus-xml-policy.c
@@ -0,0 +1,1327 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2013 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 <systemd/sd-login.h>
+
+#include "alloc-util.h"
+#include "bus-internal.h"
+#include "bus-xml-policy.h"
+#include "conf-files.h"
+#include "fileio.h"
+#include "formats-util.h"
+#include "locale-util.h"
+#include "set.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "strv.h"
+#include "user-util.h"
+#include "xml.h"
+
+static void policy_item_free(PolicyItem *i) {
+ assert(i);
+
+ free(i->interface);
+ free(i->member);
+ free(i->error);
+ free(i->name);
+ free(i->path);
+ free(i);
+}
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(PolicyItem*, policy_item_free);
+
+static void item_append(PolicyItem *i, PolicyItem **list) {
+
+ PolicyItem *tail;
+
+ LIST_FIND_TAIL(items, *list, tail);
+ LIST_INSERT_AFTER(items, *list, tail, i);
+}
+
+static int file_load(Policy *p, const char *path) {
+
+ _cleanup_free_ char *c = NULL, *policy_user = NULL, *policy_group = NULL;
+ _cleanup_(policy_item_freep) PolicyItem *i = NULL;
+ void *xml_state = NULL;
+ unsigned n_other = 0;
+ const char *q;
+ int r;
+
+ enum {
+ STATE_OUTSIDE,
+ STATE_BUSCONFIG,
+ STATE_POLICY,
+ STATE_POLICY_CONTEXT,
+ STATE_POLICY_CONSOLE,
+ STATE_POLICY_USER,
+ STATE_POLICY_GROUP,
+ STATE_POLICY_OTHER_ATTRIBUTE,
+ STATE_ALLOW_DENY,
+ STATE_ALLOW_DENY_INTERFACE,
+ STATE_ALLOW_DENY_MEMBER,
+ STATE_ALLOW_DENY_ERROR,
+ STATE_ALLOW_DENY_PATH,
+ STATE_ALLOW_DENY_MESSAGE_TYPE,
+ STATE_ALLOW_DENY_NAME,
+ STATE_ALLOW_DENY_OTHER_ATTRIBUTE,
+ STATE_OTHER,
+ } state = STATE_OUTSIDE;
+
+ enum {
+ POLICY_CATEGORY_NONE,
+ POLICY_CATEGORY_DEFAULT,
+ POLICY_CATEGORY_MANDATORY,
+ POLICY_CATEGORY_ON_CONSOLE,
+ POLICY_CATEGORY_NO_CONSOLE,
+ POLICY_CATEGORY_USER,
+ POLICY_CATEGORY_GROUP
+ } policy_category = POLICY_CATEGORY_NONE;
+
+ unsigned line = 0;
+
+ assert(p);
+
+ r = read_full_file(path, &c, NULL);
+ if (r < 0) {
+ if (r == -ENOENT)
+ return 0;
+ if (r == -EISDIR)
+ return r;
+
+ return log_error_errno(r, "Failed to load %s: %m", path);
+ }
+
+ q = c;
+ for (;;) {
+ _cleanup_free_ char *name = NULL;
+ int t;
+
+ t = xml_tokenize(&q, &name, &xml_state, &line);
+ if (t < 0)
+ return log_error_errno(t, "XML parse failure in %s: %m", path);
+
+ switch (state) {
+
+ case STATE_OUTSIDE:
+
+ if (t == XML_TAG_OPEN) {
+ if (streq(name, "busconfig"))
+ state = STATE_BUSCONFIG;
+ else {
+ log_error("Unexpected tag %s at %s:%u.", name, path, line);
+ return -EINVAL;
+ }
+
+ } else if (t == XML_END)
+ return 0;
+ else if (t != XML_TEXT || !in_charset(name, WHITESPACE)) {
+ log_error("Unexpected token (1) at %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ break;
+
+ case STATE_BUSCONFIG:
+
+ if (t == XML_TAG_OPEN) {
+ if (streq(name, "policy")) {
+ state = STATE_POLICY;
+ policy_category = POLICY_CATEGORY_NONE;
+ free(policy_user);
+ free(policy_group);
+ policy_user = policy_group = NULL;
+ } else {
+ state = STATE_OTHER;
+ n_other = 0;
+ }
+ } else if (t == XML_TAG_CLOSE_EMPTY ||
+ (t == XML_TAG_CLOSE && streq(name, "busconfig")))
+ state = STATE_OUTSIDE;
+ else if (t != XML_TEXT || !in_charset(name, WHITESPACE)) {
+ log_error("Unexpected token (2) at %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ break;
+
+ case STATE_POLICY:
+
+ if (t == XML_ATTRIBUTE_NAME) {
+ if (streq(name, "context"))
+ state = STATE_POLICY_CONTEXT;
+ else if (streq(name, "at_console"))
+ state = STATE_POLICY_CONSOLE;
+ else if (streq(name, "user"))
+ state = STATE_POLICY_USER;
+ else if (streq(name, "group"))
+ state = STATE_POLICY_GROUP;
+ else {
+ log_warning("Attribute %s of <policy> tag unknown at %s:%u, ignoring.", name, path, line);
+ state = STATE_POLICY_OTHER_ATTRIBUTE;
+ }
+ } else if (t == XML_TAG_CLOSE_EMPTY ||
+ (t == XML_TAG_CLOSE && streq(name, "policy")))
+ state = STATE_BUSCONFIG;
+ else if (t == XML_TAG_OPEN) {
+ PolicyItemType it;
+
+ if (streq(name, "allow"))
+ it = POLICY_ITEM_ALLOW;
+ else if (streq(name, "deny"))
+ it = POLICY_ITEM_DENY;
+ else {
+ log_warning("Unknown tag %s in <policy> %s:%u.", name, path, line);
+ return -EINVAL;
+ }
+
+ assert(!i);
+ i = new0(PolicyItem, 1);
+ if (!i)
+ return log_oom();
+
+ i->type = it;
+ state = STATE_ALLOW_DENY;
+
+ } else if (t != XML_TEXT || !in_charset(name, WHITESPACE)) {
+ log_error("Unexpected token (3) at %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ break;
+
+ case STATE_POLICY_CONTEXT:
+
+ if (t == XML_ATTRIBUTE_VALUE) {
+ if (streq(name, "default")) {
+ policy_category = POLICY_CATEGORY_DEFAULT;
+ state = STATE_POLICY;
+ } else if (streq(name, "mandatory")) {
+ policy_category = POLICY_CATEGORY_MANDATORY;
+ state = STATE_POLICY;
+ } else {
+ log_error("context= parameter %s unknown for <policy> at %s:%u.", name, path, line);
+ return -EINVAL;
+ }
+ } else {
+ log_error("Unexpected token (4) at %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ break;
+
+ case STATE_POLICY_CONSOLE:
+
+ if (t == XML_ATTRIBUTE_VALUE) {
+ if (streq(name, "true")) {
+ policy_category = POLICY_CATEGORY_ON_CONSOLE;
+ state = STATE_POLICY;
+ } else if (streq(name, "false")) {
+ policy_category = POLICY_CATEGORY_NO_CONSOLE;
+ state = STATE_POLICY;
+ } else {
+ log_error("at_console= parameter %s unknown for <policy> at %s:%u.", name, path, line);
+ return -EINVAL;
+ }
+ } else {
+ log_error("Unexpected token (4.1) at %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ break;
+
+ case STATE_POLICY_USER:
+
+ if (t == XML_ATTRIBUTE_VALUE) {
+ free(policy_user);
+ policy_user = name;
+ name = NULL;
+ policy_category = POLICY_CATEGORY_USER;
+ state = STATE_POLICY;
+ } else {
+ log_error("Unexpected token (5) in %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ break;
+
+ case STATE_POLICY_GROUP:
+
+ if (t == XML_ATTRIBUTE_VALUE) {
+ free(policy_group);
+ policy_group = name;
+ name = NULL;
+ policy_category = POLICY_CATEGORY_GROUP;
+ state = STATE_POLICY;
+ } else {
+ log_error("Unexpected token (6) at %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ break;
+
+ case STATE_POLICY_OTHER_ATTRIBUTE:
+
+ if (t == XML_ATTRIBUTE_VALUE)
+ state = STATE_POLICY;
+ else {
+ log_error("Unexpected token (7) in %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ break;
+
+ case STATE_ALLOW_DENY:
+
+ assert(i);
+
+ if (t == XML_ATTRIBUTE_NAME) {
+ PolicyItemClass ic;
+
+ if (startswith(name, "send_"))
+ ic = POLICY_ITEM_SEND;
+ else if (startswith(name, "receive_"))
+ ic = POLICY_ITEM_RECV;
+ else if (streq(name, "own"))
+ ic = POLICY_ITEM_OWN;
+ else if (streq(name, "own_prefix"))
+ ic = POLICY_ITEM_OWN_PREFIX;
+ else if (streq(name, "user"))
+ ic = POLICY_ITEM_USER;
+ else if (streq(name, "group"))
+ ic = POLICY_ITEM_GROUP;
+ else if (STR_IN_SET(name, "eavesdrop", "log")) {
+ log_debug("Unsupported attribute %s= at %s:%u, ignoring.", name, path, line);
+ state = STATE_ALLOW_DENY_OTHER_ATTRIBUTE;
+ break;
+ } else {
+ log_error("Unknown attribute %s= at %s:%u, ignoring.", name, path, line);
+ state = STATE_ALLOW_DENY_OTHER_ATTRIBUTE;
+ break;
+ }
+
+ if (i->class != _POLICY_ITEM_CLASS_UNSET && ic != i->class) {
+ log_error("send_, receive_/eavesdrop fields mixed on same tag at %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ i->class = ic;
+
+ if (ic == POLICY_ITEM_SEND || ic == POLICY_ITEM_RECV) {
+ const char *u;
+
+ u = strchr(name, '_');
+ assert(u);
+
+ u++;
+
+ if (streq(u, "interface"))
+ state = STATE_ALLOW_DENY_INTERFACE;
+ else if (streq(u, "member"))
+ state = STATE_ALLOW_DENY_MEMBER;
+ else if (streq(u, "error"))
+ state = STATE_ALLOW_DENY_ERROR;
+ else if (streq(u, "path"))
+ state = STATE_ALLOW_DENY_PATH;
+ else if (streq(u, "type"))
+ state = STATE_ALLOW_DENY_MESSAGE_TYPE;
+ else if ((streq(u, "destination") && ic == POLICY_ITEM_SEND) ||
+ (streq(u, "sender") && ic == POLICY_ITEM_RECV))
+ state = STATE_ALLOW_DENY_NAME;
+ else {
+ if (streq(u, "requested_reply"))
+ log_debug("Unsupported attribute %s= at %s:%u, ignoring.", name, path, line);
+ else
+ log_error("Unknown attribute %s= at %s:%u, ignoring.", name, path, line);
+ state = STATE_ALLOW_DENY_OTHER_ATTRIBUTE;
+ break;
+ }
+ } else
+ state = STATE_ALLOW_DENY_NAME;
+
+ } else if (t == XML_TAG_CLOSE_EMPTY ||
+ (t == XML_TAG_CLOSE && streq(name, i->type == POLICY_ITEM_ALLOW ? "allow" : "deny"))) {
+
+ /* If the tag is fully empty so far, we consider it a recv */
+ if (i->class == _POLICY_ITEM_CLASS_UNSET)
+ i->class = POLICY_ITEM_RECV;
+
+ if (policy_category == POLICY_CATEGORY_DEFAULT)
+ item_append(i, &p->default_items);
+ else if (policy_category == POLICY_CATEGORY_MANDATORY)
+ item_append(i, &p->mandatory_items);
+ else if (policy_category == POLICY_CATEGORY_ON_CONSOLE)
+ item_append(i, &p->on_console_items);
+ else if (policy_category == POLICY_CATEGORY_NO_CONSOLE)
+ item_append(i, &p->no_console_items);
+ else if (policy_category == POLICY_CATEGORY_USER) {
+ const char *u = policy_user;
+
+ assert_cc(sizeof(uid_t) == sizeof(uint32_t));
+
+ r = hashmap_ensure_allocated(&p->user_items, NULL);
+ if (r < 0)
+ return log_oom();
+
+ if (!u) {
+ log_error("User policy without name");
+ return -EINVAL;
+ }
+
+ r = get_user_creds(&u, &i->uid, NULL, NULL, NULL);
+ if (r < 0) {
+ log_error_errno(r, "Failed to resolve user %s, ignoring policy: %m", u);
+ free(i);
+ } else {
+ PolicyItem *first;
+
+ first = hashmap_get(p->user_items, UID_TO_PTR(i->uid));
+ item_append(i, &first);
+ i->uid_valid = true;
+
+ r = hashmap_replace(p->user_items, UID_TO_PTR(i->uid), first);
+ if (r < 0) {
+ LIST_REMOVE(items, first, i);
+ return log_oom();
+ }
+ }
+
+ } else if (policy_category == POLICY_CATEGORY_GROUP) {
+ const char *g = policy_group;
+
+ assert_cc(sizeof(gid_t) == sizeof(uint32_t));
+
+ r = hashmap_ensure_allocated(&p->group_items, NULL);
+ if (r < 0)
+ return log_oom();
+
+ if (!g) {
+ log_error("Group policy without name");
+ return -EINVAL;
+ }
+
+ r = get_group_creds(&g, &i->gid);
+ if (r < 0) {
+ log_error_errno(r, "Failed to resolve group %s, ignoring policy: %m", g);
+ free(i);
+ } else {
+ PolicyItem *first;
+
+ first = hashmap_get(p->group_items, GID_TO_PTR(i->gid));
+ item_append(i, &first);
+ i->gid_valid = true;
+
+ r = hashmap_replace(p->group_items, GID_TO_PTR(i->gid), first);
+ if (r < 0) {
+ LIST_REMOVE(items, first, i);
+ return log_oom();
+ }
+ }
+ }
+
+ state = STATE_POLICY;
+ i = NULL;
+
+ } else if (t != XML_TEXT || !in_charset(name, WHITESPACE)) {
+ log_error("Unexpected token (8) at %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ break;
+
+ case STATE_ALLOW_DENY_INTERFACE:
+
+ if (t == XML_ATTRIBUTE_VALUE) {
+ assert(i);
+ if (i->interface) {
+ log_error("Duplicate interface at %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ if (!streq(name, "*")) {
+ i->interface = name;
+ name = NULL;
+ }
+ state = STATE_ALLOW_DENY;
+ } else {
+ log_error("Unexpected token (9) at %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ break;
+
+ case STATE_ALLOW_DENY_MEMBER:
+
+ if (t == XML_ATTRIBUTE_VALUE) {
+ assert(i);
+ if (i->member) {
+ log_error("Duplicate member in %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ if (!streq(name, "*")) {
+ i->member = name;
+ name = NULL;
+ }
+ state = STATE_ALLOW_DENY;
+ } else {
+ log_error("Unexpected token (10) in %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ break;
+
+ case STATE_ALLOW_DENY_ERROR:
+
+ if (t == XML_ATTRIBUTE_VALUE) {
+ assert(i);
+ if (i->error) {
+ log_error("Duplicate error in %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ if (!streq(name, "*")) {
+ i->error = name;
+ name = NULL;
+ }
+ state = STATE_ALLOW_DENY;
+ } else {
+ log_error("Unexpected token (11) in %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ break;
+
+ case STATE_ALLOW_DENY_PATH:
+
+ if (t == XML_ATTRIBUTE_VALUE) {
+ assert(i);
+ if (i->path) {
+ log_error("Duplicate path in %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ if (!streq(name, "*")) {
+ i->path = name;
+ name = NULL;
+ }
+ state = STATE_ALLOW_DENY;
+ } else {
+ log_error("Unexpected token (12) in %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ break;
+
+ case STATE_ALLOW_DENY_MESSAGE_TYPE:
+
+ if (t == XML_ATTRIBUTE_VALUE) {
+ assert(i);
+
+ if (i->message_type != 0) {
+ log_error("Duplicate message type in %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ if (!streq(name, "*")) {
+ r = bus_message_type_from_string(name, &i->message_type);
+ if (r < 0) {
+ log_error("Invalid message type in %s:%u.", path, line);
+ return -EINVAL;
+ }
+ }
+
+ state = STATE_ALLOW_DENY;
+ } else {
+ log_error("Unexpected token (13) in %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ break;
+
+ case STATE_ALLOW_DENY_NAME:
+
+ if (t == XML_ATTRIBUTE_VALUE) {
+ assert(i);
+ if (i->name) {
+ log_error("Duplicate name in %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ switch (i->class) {
+ case POLICY_ITEM_USER:
+ if (!streq(name, "*")) {
+ const char *u = name;
+
+ r = get_user_creds(&u, &i->uid, NULL, NULL, NULL);
+ if (r < 0)
+ log_error_errno(r, "Failed to resolve user %s: %m", name);
+ else
+ i->uid_valid = true;
+ }
+ break;
+ case POLICY_ITEM_GROUP:
+ if (!streq(name, "*")) {
+ const char *g = name;
+
+ r = get_group_creds(&g, &i->gid);
+ if (r < 0)
+ log_error_errno(r, "Failed to resolve group %s: %m", name);
+ else
+ i->gid_valid = true;
+ }
+ break;
+
+ case POLICY_ITEM_SEND:
+ case POLICY_ITEM_RECV:
+
+ if (streq(name, "*"))
+ name = mfree(name);
+ break;
+
+
+ default:
+ break;
+ }
+
+ i->name = name;
+ name = NULL;
+
+ state = STATE_ALLOW_DENY;
+ } else {
+ log_error("Unexpected token (14) in %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ break;
+
+ case STATE_ALLOW_DENY_OTHER_ATTRIBUTE:
+
+ if (t == XML_ATTRIBUTE_VALUE)
+ state = STATE_ALLOW_DENY;
+ else {
+ log_error("Unexpected token (15) in %s:%u.", path, line);
+ return -EINVAL;
+ }
+
+ break;
+
+ case STATE_OTHER:
+
+ if (t == XML_TAG_OPEN)
+ n_other++;
+ else if (t == XML_TAG_CLOSE || t == XML_TAG_CLOSE_EMPTY) {
+
+ if (n_other == 0)
+ state = STATE_BUSCONFIG;
+ else
+ n_other--;
+ }
+
+ break;
+ }
+ }
+}
+
+enum {
+ DENY,
+ ALLOW,
+ DUNNO,
+};
+
+static const char *verdict_to_string(int v) {
+ switch (v) {
+
+ case DENY:
+ return "DENY";
+ case ALLOW:
+ return "ALLOW";
+ case DUNNO:
+ return "DUNNO";
+ }
+
+ return NULL;
+}
+
+struct policy_check_filter {
+ PolicyItemClass class;
+ uid_t uid;
+ gid_t gid;
+ int message_type;
+ const char *name;
+ const char *interface;
+ const char *path;
+ const char *member;
+};
+
+static int is_permissive(PolicyItem *i) {
+
+ assert(i);
+
+ return (i->type == POLICY_ITEM_ALLOW) ? ALLOW : DENY;
+}
+
+static int check_policy_item(PolicyItem *i, const struct policy_check_filter *filter) {
+
+ assert(i);
+ assert(filter);
+
+ switch (i->class) {
+ case POLICY_ITEM_SEND:
+ case POLICY_ITEM_RECV:
+
+ if (i->name && !streq_ptr(i->name, filter->name))
+ break;
+
+ if ((i->message_type != 0) && (i->message_type != filter->message_type))
+ break;
+
+ if (i->path && !streq_ptr(i->path, filter->path))
+ break;
+
+ if (i->member && !streq_ptr(i->member, filter->member))
+ break;
+
+ if (i->interface && !streq_ptr(i->interface, filter->interface))
+ break;
+
+ return is_permissive(i);
+
+ case POLICY_ITEM_OWN:
+ assert(filter->name);
+
+ if (streq(i->name, "*") || streq(i->name, filter->name))
+ return is_permissive(i);
+ break;
+
+ case POLICY_ITEM_OWN_PREFIX:
+ assert(filter->name);
+
+ if (streq(i->name, "*") || service_name_startswith(filter->name, i->name))
+ return is_permissive(i);
+ break;
+
+ case POLICY_ITEM_USER:
+ if (filter->uid != UID_INVALID)
+ if ((streq_ptr(i->name, "*") || (i->uid_valid && i->uid == filter->uid)))
+ return is_permissive(i);
+ break;
+
+ case POLICY_ITEM_GROUP:
+ if (filter->gid != GID_INVALID)
+ if ((streq_ptr(i->name, "*") || (i->gid_valid && i->gid == filter->gid)))
+ return is_permissive(i);
+ break;
+
+ case POLICY_ITEM_IGNORE:
+ default:
+ break;
+ }
+
+ return DUNNO;
+}
+
+static int check_policy_items(PolicyItem *items, const struct policy_check_filter *filter) {
+
+ PolicyItem *i;
+ int verdict = DUNNO;
+
+ assert(filter);
+
+ /* Check all policies in a set - a broader one might be followed by a more specific one,
+ * and the order of rules in policy definitions matters */
+ LIST_FOREACH(items, i, items) {
+ int v;
+
+ if (i->class != filter->class &&
+ !(i->class == POLICY_ITEM_OWN_PREFIX && filter->class == POLICY_ITEM_OWN))
+ continue;
+
+ v = check_policy_item(i, filter);
+ if (v != DUNNO)
+ verdict = v;
+ }
+
+ return verdict;
+}
+
+static int policy_check(Policy *p, const struct policy_check_filter *filter) {
+
+ PolicyItem *items;
+ int verdict, v;
+
+ assert(p);
+ assert(filter);
+
+ assert(IN_SET(filter->class, POLICY_ITEM_SEND, POLICY_ITEM_RECV, POLICY_ITEM_OWN, POLICY_ITEM_USER, POLICY_ITEM_GROUP));
+
+ /*
+ * The policy check is implemented by the following logic:
+ *
+ * 1. Check default items
+ * 2. Check group items
+ * 3. Check user items
+ * 4. Check on/no_console items
+ * 5. Check mandatory items
+ *
+ * Later rules override earlier rules.
+ */
+
+ verdict = check_policy_items(p->default_items, filter);
+
+ if (filter->gid != GID_INVALID) {
+ items = hashmap_get(p->group_items, GID_TO_PTR(filter->gid));
+ if (items) {
+ v = check_policy_items(items, filter);
+ if (v != DUNNO)
+ verdict = v;
+ }
+ }
+
+ if (filter->uid != UID_INVALID) {
+ items = hashmap_get(p->user_items, UID_TO_PTR(filter->uid));
+ if (items) {
+ v = check_policy_items(items, filter);
+ if (v != DUNNO)
+ verdict = v;
+ }
+ }
+
+ if (filter->uid != UID_INVALID && sd_uid_get_seats(filter->uid, -1, NULL) > 0)
+ v = check_policy_items(p->on_console_items, filter);
+ else
+ v = check_policy_items(p->no_console_items, filter);
+ if (v != DUNNO)
+ verdict = v;
+
+ v = check_policy_items(p->mandatory_items, filter);
+ if (v != DUNNO)
+ verdict = v;
+
+ return verdict;
+}
+
+bool policy_check_own(Policy *p, uid_t uid, gid_t gid, const char *name) {
+
+ struct policy_check_filter filter = {
+ .class = POLICY_ITEM_OWN,
+ .uid = uid,
+ .gid = gid,
+ .name = name,
+ };
+
+ int verdict;
+
+ assert(p);
+ assert(name);
+
+ verdict = policy_check(p, &filter);
+
+ log_full(LOG_AUTH | (verdict != ALLOW ? LOG_WARNING : LOG_DEBUG),
+ "Ownership permission check for uid=" UID_FMT " gid=" GID_FMT" name=%s: %s",
+ uid, gid, strna(name), strna(verdict_to_string(verdict)));
+
+ return verdict == ALLOW;
+}
+
+bool policy_check_hello(Policy *p, uid_t uid, gid_t gid) {
+
+ struct policy_check_filter filter = {
+ .uid = uid,
+ .gid = gid,
+ };
+ int verdict;
+
+ assert(p);
+
+ filter.class = POLICY_ITEM_USER;
+ verdict = policy_check(p, &filter);
+
+ if (verdict != DENY) {
+ int v;
+
+ filter.class = POLICY_ITEM_GROUP;
+ v = policy_check(p, &filter);
+ if (v != DUNNO)
+ verdict = v;
+ }
+
+ log_full(LOG_AUTH | (verdict != ALLOW ? LOG_WARNING : LOG_DEBUG),
+ "Hello permission check for uid=" UID_FMT " gid=" GID_FMT": %s",
+ uid, gid, strna(verdict_to_string(verdict)));
+
+ return verdict == ALLOW;
+}
+
+bool policy_check_one_recv(Policy *p,
+ uid_t uid,
+ gid_t gid,
+ int message_type,
+ const char *name,
+ const char *path,
+ const char *interface,
+ const char *member) {
+
+ struct policy_check_filter filter = {
+ .class = POLICY_ITEM_RECV,
+ .uid = uid,
+ .gid = gid,
+ .message_type = message_type,
+ .name = name,
+ .interface = interface,
+ .path = path,
+ .member = member,
+ };
+
+ assert(p);
+
+ return policy_check(p, &filter) == ALLOW;
+}
+
+bool policy_check_recv(Policy *p,
+ uid_t uid,
+ gid_t gid,
+ int message_type,
+ Set *names,
+ char **namesv,
+ const char *path,
+ const char *interface,
+ const char *member,
+ bool dbus_to_kernel) {
+
+ char *n, **nv, *last = NULL;
+ bool allow = false;
+ Iterator i;
+
+ assert(p);
+
+ if (set_isempty(names) && strv_isempty(namesv)) {
+ allow = policy_check_one_recv(p, uid, gid, message_type, NULL, path, interface, member);
+ } else {
+ SET_FOREACH(n, names, i) {
+ last = n;
+ allow = policy_check_one_recv(p, uid, gid, message_type, n, path, interface, member);
+ if (allow)
+ break;
+ }
+ if (!allow) {
+ STRV_FOREACH(nv, namesv) {
+ last = *nv;
+ allow = policy_check_one_recv(p, uid, gid, message_type, *nv, path, interface, member);
+ if (allow)
+ break;
+ }
+ }
+ }
+
+ log_full(LOG_AUTH | (!allow ? LOG_WARNING : LOG_DEBUG),
+ "Receive permission check %s for uid=" UID_FMT " gid=" GID_FMT" message=%s name=%s path=%s interface=%s member=%s: %s",
+ dbus_to_kernel ? "dbus-1 to kernel" : "kernel to dbus-1", uid, gid, bus_message_type_to_string(message_type), strna(last),
+ strna(path), strna(interface), strna(member), allow ? "ALLOW" : "DENY");
+
+ return allow;
+}
+
+bool policy_check_one_send(Policy *p,
+ uid_t uid,
+ gid_t gid,
+ int message_type,
+ const char *name,
+ const char *path,
+ const char *interface,
+ const char *member) {
+
+ struct policy_check_filter filter = {
+ .class = POLICY_ITEM_SEND,
+ .uid = uid,
+ .gid = gid,
+ .message_type = message_type,
+ .name = name,
+ .interface = interface,
+ .path = path,
+ .member = member,
+ };
+
+ assert(p);
+
+ return policy_check(p, &filter) == ALLOW;
+}
+
+bool policy_check_send(Policy *p,
+ uid_t uid,
+ gid_t gid,
+ int message_type,
+ Set *names,
+ char **namesv,
+ const char *path,
+ const char *interface,
+ const char *member,
+ bool dbus_to_kernel,
+ char **out_used_name) {
+
+ char *n, **nv, *last = NULL;
+ bool allow = false;
+ Iterator i;
+
+ assert(p);
+
+ if (set_isempty(names) && strv_isempty(namesv)) {
+ allow = policy_check_one_send(p, uid, gid, message_type, NULL, path, interface, member);
+ } else {
+ SET_FOREACH(n, names, i) {
+ last = n;
+ allow = policy_check_one_send(p, uid, gid, message_type, n, path, interface, member);
+ if (allow)
+ break;
+ }
+ if (!allow) {
+ STRV_FOREACH(nv, namesv) {
+ last = *nv;
+ allow = policy_check_one_send(p, uid, gid, message_type, *nv, path, interface, member);
+ if (allow)
+ break;
+ }
+ }
+ }
+
+ if (out_used_name)
+ *out_used_name = last;
+
+ log_full(LOG_AUTH | (!allow ? LOG_WARNING : LOG_DEBUG),
+ "Send permission check %s for uid=" UID_FMT " gid=" GID_FMT" message=%s name=%s path=%s interface=%s member=%s: %s",
+ dbus_to_kernel ? "dbus-1 to kernel" : "kernel to dbus-1", uid, gid, bus_message_type_to_string(message_type), strna(last),
+ strna(path), strna(interface), strna(member), allow ? "ALLOW" : "DENY");
+
+ return allow;
+}
+
+int policy_load(Policy *p, char **files) {
+ char **i;
+ int r;
+
+ assert(p);
+
+ STRV_FOREACH(i, files) {
+
+ r = file_load(p, *i);
+ if (r == -EISDIR) {
+ _cleanup_strv_free_ char **l = NULL;
+ char **j;
+
+ r = conf_files_list(&l, ".conf", NULL, *i, NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to get configuration file list: %m");
+
+ STRV_FOREACH(j, l)
+ file_load(p, *j);
+ }
+
+ /* We ignore all errors but EISDIR, and just proceed. */
+ }
+
+ return 0;
+}
+
+void policy_free(Policy *p) {
+ PolicyItem *i, *first;
+
+ if (!p)
+ return;
+
+ while ((i = p->default_items)) {
+ LIST_REMOVE(items, p->default_items, i);
+ policy_item_free(i);
+ }
+
+ while ((i = p->mandatory_items)) {
+ LIST_REMOVE(items, p->mandatory_items, i);
+ policy_item_free(i);
+ }
+
+ while ((i = p->on_console_items)) {
+ LIST_REMOVE(items, p->on_console_items, i);
+ policy_item_free(i);
+ }
+
+ while ((i = p->no_console_items)) {
+ LIST_REMOVE(items, p->no_console_items, i);
+ policy_item_free(i);
+ }
+
+ while ((first = hashmap_steal_first(p->user_items))) {
+
+ while ((i = first)) {
+ LIST_REMOVE(items, first, i);
+ policy_item_free(i);
+ }
+ }
+
+ while ((first = hashmap_steal_first(p->group_items))) {
+
+ while ((i = first)) {
+ LIST_REMOVE(items, first, i);
+ policy_item_free(i);
+ }
+ }
+
+ hashmap_free(p->user_items);
+ hashmap_free(p->group_items);
+
+ p->user_items = p->group_items = NULL;
+}
+
+static void dump_items(PolicyItem *items, const char *prefix) {
+
+ PolicyItem *i;
+
+ if (!items)
+ return;
+
+ if (!prefix)
+ prefix = "";
+
+ LIST_FOREACH(items, i, items) {
+
+ printf("%sType: %s\n"
+ "%sClass: %s\n",
+ prefix, policy_item_type_to_string(i->type),
+ prefix, policy_item_class_to_string(i->class));
+
+ if (i->interface)
+ printf("%sInterface: %s\n",
+ prefix, i->interface);
+
+ if (i->member)
+ printf("%sMember: %s\n",
+ prefix, i->member);
+
+ if (i->error)
+ printf("%sError: %s\n",
+ prefix, i->error);
+
+ if (i->path)
+ printf("%sPath: %s\n",
+ prefix, i->path);
+
+ if (i->name)
+ printf("%sName: %s\n",
+ prefix, i->name);
+
+ if (i->message_type != 0)
+ printf("%sMessage Type: %s\n",
+ prefix, bus_message_type_to_string(i->message_type));
+
+ if (i->uid_valid) {
+ _cleanup_free_ char *user;
+
+ user = uid_to_name(i->uid);
+
+ printf("%sUser: %s ("UID_FMT")\n",
+ prefix, strna(user), i->uid);
+ }
+
+ if (i->gid_valid) {
+ _cleanup_free_ char *group;
+
+ group = gid_to_name(i->gid);
+
+ printf("%sGroup: %s ("GID_FMT")\n",
+ prefix, strna(group), i->gid);
+ }
+ printf("%s-\n", prefix);
+ }
+}
+
+static void dump_hashmap_items(Hashmap *h) {
+ PolicyItem *i;
+ Iterator j;
+ void *k;
+
+ HASHMAP_FOREACH_KEY(i, k, h, j) {
+ printf("\t%s Item for " UID_FMT ":\n", draw_special_char(DRAW_ARROW), PTR_TO_UID(k));
+ dump_items(i, "\t\t");
+ }
+}
+
+void policy_dump(Policy *p) {
+
+ printf("%s Default Items:\n", draw_special_char(DRAW_ARROW));
+ dump_items(p->default_items, "\t");
+
+ printf("%s Group Items:\n", draw_special_char(DRAW_ARROW));
+ dump_hashmap_items(p->group_items);
+
+ printf("%s User Items:\n", draw_special_char(DRAW_ARROW));
+ dump_hashmap_items(p->user_items);
+
+ printf("%s On-Console Items:\n", draw_special_char(DRAW_ARROW));
+ dump_items(p->on_console_items, "\t");
+
+ printf("%s No-Console Items:\n", draw_special_char(DRAW_ARROW));
+ dump_items(p->no_console_items, "\t");
+
+ printf("%s Mandatory Items:\n", draw_special_char(DRAW_ARROW));
+ dump_items(p->mandatory_items, "\t");
+
+ fflush(stdout);
+}
+
+int shared_policy_new(SharedPolicy **out) {
+ SharedPolicy *sp;
+ int r;
+
+ sp = new0(SharedPolicy, 1);
+ if (!sp)
+ return log_oom();
+
+ r = pthread_mutex_init(&sp->lock, NULL);
+ if (r != 0) {
+ r = log_error_errno(r, "Cannot initialize shared policy mutex: %m");
+ goto exit_free;
+ }
+
+ r = pthread_rwlock_init(&sp->rwlock, NULL);
+ if (r != 0) {
+ r = log_error_errno(r, "Cannot initialize shared policy rwlock: %m");
+ goto exit_mutex;
+ }
+
+ *out = sp;
+ sp = NULL;
+ return 0;
+
+ /* pthread lock destruction is not fail-safe... meh! */
+exit_mutex:
+ pthread_mutex_destroy(&sp->lock);
+exit_free:
+ free(sp);
+ return r;
+}
+
+SharedPolicy *shared_policy_free(SharedPolicy *sp) {
+ if (!sp)
+ return NULL;
+
+ policy_free(sp->policy);
+ pthread_rwlock_destroy(&sp->rwlock);
+ pthread_mutex_destroy(&sp->lock);
+ strv_free(sp->configuration);
+ free(sp);
+
+ return NULL;
+}
+
+static int shared_policy_reload_unlocked(SharedPolicy *sp, char **configuration) {
+ Policy old, buffer = {};
+ bool free_old;
+ int r;
+
+ assert(sp);
+
+ r = policy_load(&buffer, configuration);
+ if (r < 0)
+ return log_error_errno(r, "Failed to load policy: %m");
+
+ log_debug("Reloading configuration");
+ /* policy_dump(&buffer); */
+
+ pthread_rwlock_wrlock(&sp->rwlock);
+ memcpy(&old, &sp->buffer, sizeof(old));
+ memcpy(&sp->buffer, &buffer, sizeof(buffer));
+ free_old = !!sp->policy;
+ sp->policy = &sp->buffer;
+ pthread_rwlock_unlock(&sp->rwlock);
+
+ if (free_old)
+ policy_free(&old);
+
+ return 0;
+}
+
+int shared_policy_reload(SharedPolicy *sp) {
+ int r;
+
+ assert(sp);
+
+ pthread_mutex_lock(&sp->lock);
+ r = shared_policy_reload_unlocked(sp, sp->configuration);
+ pthread_mutex_unlock(&sp->lock);
+
+ return r;
+}
+
+int shared_policy_preload(SharedPolicy *sp, char **configuration) {
+ _cleanup_strv_free_ char **conf = NULL;
+ int r = 0;
+
+ assert(sp);
+
+ conf = strv_copy(configuration);
+ if (!conf)
+ return log_oom();
+
+ pthread_mutex_lock(&sp->lock);
+ if (!sp->policy) {
+ r = shared_policy_reload_unlocked(sp, conf);
+ if (r >= 0) {
+ sp->configuration = conf;
+ conf = NULL;
+ }
+ }
+ pthread_mutex_unlock(&sp->lock);
+
+ return r;
+}
+
+Policy *shared_policy_acquire(SharedPolicy *sp) {
+ assert(sp);
+
+ pthread_rwlock_rdlock(&sp->rwlock);
+ if (sp->policy)
+ return sp->policy;
+ pthread_rwlock_unlock(&sp->rwlock);
+
+ return NULL;
+}
+
+void shared_policy_release(SharedPolicy *sp, Policy *p) {
+ assert(sp);
+ assert(!p || sp->policy == p);
+
+ if (p)
+ pthread_rwlock_unlock(&sp->rwlock);
+}
+
+static const char* const policy_item_type_table[_POLICY_ITEM_TYPE_MAX] = {
+ [_POLICY_ITEM_TYPE_UNSET] = "unset",
+ [POLICY_ITEM_ALLOW] = "allow",
+ [POLICY_ITEM_DENY] = "deny",
+};
+DEFINE_STRING_TABLE_LOOKUP(policy_item_type, PolicyItemType);
+
+static const char* const policy_item_class_table[_POLICY_ITEM_CLASS_MAX] = {
+ [_POLICY_ITEM_CLASS_UNSET] = "unset",
+ [POLICY_ITEM_SEND] = "send",
+ [POLICY_ITEM_RECV] = "recv",
+ [POLICY_ITEM_OWN] = "own",
+ [POLICY_ITEM_OWN_PREFIX] = "own-prefix",
+ [POLICY_ITEM_USER] = "user",
+ [POLICY_ITEM_GROUP] = "group",
+ [POLICY_ITEM_IGNORE] = "ignore",
+};
+DEFINE_STRING_TABLE_LOOKUP(policy_item_class, PolicyItemClass);
diff --git a/src/libbus-proxy-core/bus-xml-policy.h b/src/libbus-proxy-core/bus-xml-policy.h
new file mode 100644
index 0000000000..3dcddaa048
--- /dev/null
+++ b/src/libbus-proxy-core/bus-xml-policy.h
@@ -0,0 +1,147 @@
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2013 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 <pthread.h>
+
+#include "hashmap.h"
+#include "list.h"
+
+typedef enum PolicyItemType {
+ _POLICY_ITEM_TYPE_UNSET = 0,
+ POLICY_ITEM_ALLOW,
+ POLICY_ITEM_DENY,
+ _POLICY_ITEM_TYPE_MAX,
+ _POLICY_ITEM_TYPE_INVALID = -1,
+} PolicyItemType;
+
+typedef enum PolicyItemClass {
+ _POLICY_ITEM_CLASS_UNSET = 0,
+ POLICY_ITEM_SEND,
+ POLICY_ITEM_RECV,
+ POLICY_ITEM_OWN,
+ POLICY_ITEM_OWN_PREFIX,
+ POLICY_ITEM_USER,
+ POLICY_ITEM_GROUP,
+ POLICY_ITEM_IGNORE,
+ _POLICY_ITEM_CLASS_MAX,
+ _POLICY_ITEM_CLASS_INVALID = -1,
+} PolicyItemClass;
+
+typedef struct PolicyItem PolicyItem;
+
+struct PolicyItem {
+ PolicyItemType type;
+ PolicyItemClass class;
+ char *interface;
+ char *member;
+ char *error;
+ char *path;
+ char *name;
+ uint8_t message_type;
+ uid_t uid;
+ gid_t gid;
+
+ bool uid_valid, gid_valid;
+
+ LIST_FIELDS(PolicyItem, items);
+};
+
+typedef struct Policy {
+ LIST_HEAD(PolicyItem, default_items);
+ LIST_HEAD(PolicyItem, mandatory_items);
+ LIST_HEAD(PolicyItem, on_console_items);
+ LIST_HEAD(PolicyItem, no_console_items);
+ Hashmap *user_items;
+ Hashmap *group_items;
+} Policy;
+
+typedef struct SharedPolicy {
+ char **configuration;
+ pthread_mutex_t lock;
+ pthread_rwlock_t rwlock;
+ Policy buffer;
+ Policy *policy;
+} SharedPolicy;
+
+/* policy */
+
+int policy_load(Policy *p, char **files);
+void policy_free(Policy *p);
+
+bool policy_check_own(Policy *p, uid_t uid, gid_t gid, const char *name);
+bool policy_check_hello(Policy *p, uid_t uid, gid_t gid);
+bool policy_check_one_recv(Policy *p,
+ uid_t uid,
+ gid_t gid,
+ int message_type,
+ const char *name,
+ const char *path,
+ const char *interface,
+ const char *member);
+bool policy_check_recv(Policy *p,
+ uid_t uid,
+ gid_t gid,
+ int message_type,
+ Set *names,
+ char **namesv,
+ const char *path,
+ const char *interface,
+ const char *member,
+ bool dbus_to_kernel);
+bool policy_check_one_send(Policy *p,
+ uid_t uid,
+ gid_t gid,
+ int message_type,
+ const char *name,
+ const char *path,
+ const char *interface,
+ const char *member);
+bool policy_check_send(Policy *p,
+ uid_t uid,
+ gid_t gid,
+ int message_type,
+ Set *names,
+ char **namesv,
+ const char *path,
+ const char *interface,
+ const char *member,
+ bool dbus_to_kernel,
+ char **out_used_name);
+
+void policy_dump(Policy *p);
+
+const char* policy_item_type_to_string(PolicyItemType t) _const_;
+PolicyItemType policy_item_type_from_string(const char *s) _pure_;
+
+const char* policy_item_class_to_string(PolicyItemClass t) _const_;
+PolicyItemClass policy_item_class_from_string(const char *s) _pure_;
+
+/* shared policy */
+
+int shared_policy_new(SharedPolicy **out);
+SharedPolicy *shared_policy_free(SharedPolicy *sp);
+
+int shared_policy_reload(SharedPolicy *sp);
+int shared_policy_preload(SharedPolicy *sp, char **configuration);
+Policy *shared_policy_acquire(SharedPolicy *sp);
+void shared_policy_release(SharedPolicy *sp, Policy *p);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(SharedPolicy*, shared_policy_free);
diff --git a/src/libbus-proxy-core/driver.c b/src/libbus-proxy-core/driver.c
new file mode 100644
index 0000000000..133b2e0f39
--- /dev/null
+++ b/src/libbus-proxy-core/driver.c
@@ -0,0 +1,745 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+ Copyright 2013 Daniel Mack
+ Copyright 2014 Kay Sievers
+
+ 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 <errno.h>
+#include <stddef.h>
+#include <string.h>
+
+#include <systemd/sd-bus.h>
+
+#include "alloc-util.h"
+#include "bus-internal.h"
+#include "bus-message.h"
+#include "bus-util.h"
+#include "driver.h"
+#include "env-util.h"
+#include "proxy.h"
+#include "set.h"
+#include "strv.h"
+#include "synthesize.h"
+#include "util.h"
+
+static int get_creds_by_name(sd_bus *bus, const char *name, uint64_t mask, sd_bus_creds **_creds, sd_bus_error *error) {
+ _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *c = NULL;
+ int r;
+
+ assert(bus);
+ assert(name);
+ assert(_creds);
+
+ r = sd_bus_get_name_creds(bus, name, mask, &c);
+ if (r == -ESRCH || r == -ENXIO)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_NAME_HAS_NO_OWNER, "Name %s is currently not owned by anyone.", name);
+ if (r < 0)
+ return r;
+
+ *_creds = c;
+ c = NULL;
+
+ return 0;
+}
+
+static int get_creds_by_message(sd_bus *bus, sd_bus_message *m, uint64_t mask, sd_bus_creds **_creds, sd_bus_error *error) {
+ const char *name;
+ int r;
+
+ assert(bus);
+ assert(m);
+ assert(_creds);
+
+ r = sd_bus_message_read(m, "s", &name);
+ if (r < 0)
+ return r;
+
+ return get_creds_by_name(bus, name, mask, _creds, error);
+}
+
+static int driver_activation(sd_bus_message *reply, void *userdata, sd_bus_error *error) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
+ ProxyActivation *activation = userdata;
+
+ /*
+ * The org.freedesktop.DBus.Peer.Ping() call returned. We don't care
+ * whether this succeeded, failed, was not implemented or timed out. We
+ * cannot assume that the target reacts to this properly. Hence, just
+ * send the reply to the activation request and be done.
+ */
+
+ m = activation->request; /* claim reference */
+
+ --activation->proxy->n_activations;
+ LIST_REMOVE(activations_by_proxy, activation->proxy->activations, activation);
+ sd_bus_slot_unref(activation->slot);
+ free(activation);
+
+ return synthetic_reply_method_return(m, "u", BUS_START_REPLY_SUCCESS);
+}
+
+int bus_proxy_process_driver(Proxy *p, sd_bus *a, sd_bus *b, sd_bus_message *m, SharedPolicy *sp, const struct ucred *ucred, Set *owned_names) {
+ int r;
+
+ assert(a);
+ assert(b);
+ assert(m);
+
+ if (!a->is_kernel)
+ return 0;
+
+ if (!streq_ptr(sd_bus_message_get_destination(m), "org.freedesktop.DBus"))
+ return 0;
+
+ /* The "Hello()" call is is handled in process_hello() */
+
+ if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) {
+
+ if (!sd_bus_message_has_signature(m, ""))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ return synthetic_reply_method_return(m, "s",
+ "<!DOCTYPE node PUBLIC \"-//freedesktop//DTD D-BUS Object Introspection 1.0//EN\" "
+ "\"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\">\n"
+ "<node>\n"
+ " <interface name=\"org.freedesktop.DBus.Introspectable\">\n"
+ " <method name=\"Introspect\">\n"
+ " <arg name=\"data\" type=\"s\" direction=\"out\"/>\n"
+ " </method>\n"
+ " </interface>\n"
+ " <interface name=\"org.freedesktop.DBus\">\n"
+ " <method name=\"AddMatch\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " </method>\n"
+ " <method name=\"RemoveMatch\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " </method>\n"
+ " <method name=\"GetConnectionCredentials\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " <arg type=\"a{sv}\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"GetConnectionSELinuxSecurityContext\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " <arg type=\"ay\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"GetConnectionUnixProcessID\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " <arg type=\"u\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"GetConnectionUnixUser\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " <arg type=\"u\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"GetId\">\n"
+ " <arg type=\"s\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"GetNameOwner\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " <arg type=\"s\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"Hello\">\n"
+ " <arg type=\"s\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"ListActivatableNames\">\n"
+ " <arg type=\"as\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"ListNames\">\n"
+ " <arg type=\"as\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"ListQueuedOwners\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " <arg type=\"as\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"NameHasOwner\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " <arg type=\"b\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"ReleaseName\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " <arg type=\"u\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"ReloadConfig\">\n"
+ " </method>\n"
+ " <method name=\"RequestName\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " <arg type=\"u\" direction=\"in\"/>\n"
+ " <arg type=\"u\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"StartServiceByName\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " <arg type=\"u\" direction=\"in\"/>\n"
+ " <arg type=\"u\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"UpdateActivationEnvironment\">\n"
+ " <arg type=\"a{ss}\" direction=\"in\"/>\n"
+ " </method>\n"
+ " <signal name=\"NameAcquired\">\n"
+ " <arg type=\"s\"/>\n"
+ " </signal>\n"
+ " <signal name=\"NameLost\">\n"
+ " <arg type=\"s\"/>\n"
+ " </signal>\n"
+ " <signal name=\"NameOwnerChanged\">\n"
+ " <arg type=\"s\"/>\n"
+ " <arg type=\"s\"/>\n"
+ " <arg type=\"s\"/>\n"
+ " </signal>\n"
+ " </interface>\n"
+ "</node>\n");
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "AddMatch")) {
+ const char *match;
+
+ if (!sd_bus_message_has_signature(m, "s"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_message_read(m, "s", &match);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_add_match(a, NULL, match, proxy_match, p);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ return synthetic_reply_method_return(m, NULL);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "RemoveMatch")) {
+ const char *match;
+
+ if (!sd_bus_message_has_signature(m, "s"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_message_read(m, "s", &match);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = bus_remove_match_by_string(a, match, NULL, NULL);
+ if (r == 0)
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_MATCH_RULE_NOT_FOUND, "Match rule not found"));
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ return synthetic_reply_method_return(m, NULL);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionCredentials")) {
+ _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+
+ if (!sd_bus_message_has_signature(m, "s"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = get_creds_by_message(a, m, SD_BUS_CREDS_PID|SD_BUS_CREDS_EUID|SD_BUS_CREDS_SELINUX_CONTEXT, &creds, &error);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, &error);
+
+ r = sd_bus_message_new_method_return(m, &reply);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_message_open_container(reply, 'a', "{sv}");
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ /* Due to i.e. namespace translations some data might be missing */
+
+ if (creds->mask & SD_BUS_CREDS_PID) {
+ r = sd_bus_message_append(reply, "{sv}", "ProcessID", "u", (uint32_t) creds->pid);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+ }
+
+ if (creds->mask & SD_BUS_CREDS_EUID) {
+ r = sd_bus_message_append(reply, "{sv}", "UnixUserID", "u", (uint32_t) creds->euid);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+ }
+
+ if (creds->mask & SD_BUS_CREDS_SELINUX_CONTEXT) {
+ r = sd_bus_message_open_container(reply, 'e', "sv");
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_message_append(reply, "s", "LinuxSecurityLabel");
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_message_open_container(reply, 'v', "ay");
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_message_append_array(reply, 'y', creds->label, strlen(creds->label));
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+ }
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ return synthetic_driver_send(m->bus, reply);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionSELinuxSecurityContext")) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
+ _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+
+ if (!sd_bus_message_has_signature(m, "s"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = get_creds_by_message(a, m, SD_BUS_CREDS_SELINUX_CONTEXT, &creds, &error);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, &error);
+
+ if (!(creds->mask & SD_BUS_CREDS_SELINUX_CONTEXT))
+ return synthetic_reply_method_errno(m, -EOPNOTSUPP, NULL);
+
+ r = sd_bus_message_new_method_return(m, &reply);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_message_append_array(reply, 'y', creds->label, strlen(creds->label));
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ return synthetic_driver_send(m->bus, reply);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionUnixProcessID")) {
+ _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+
+ if (!sd_bus_message_has_signature(m, "s"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = get_creds_by_message(a, m, SD_BUS_CREDS_PID, &creds, &error);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, &error);
+
+ if (!(creds->mask & SD_BUS_CREDS_PID))
+ return synthetic_reply_method_errno(m, -EOPNOTSUPP, NULL);
+
+ return synthetic_reply_method_return(m, "u", (uint32_t) creds->pid);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionUnixUser")) {
+ _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+
+ if (!sd_bus_message_has_signature(m, "s"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = get_creds_by_message(a, m, SD_BUS_CREDS_EUID, &creds, &error);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, &error);
+
+ if (!(creds->mask & SD_BUS_CREDS_EUID))
+ return synthetic_reply_method_errno(m, -EOPNOTSUPP, NULL);
+
+ return synthetic_reply_method_return(m, "u", (uint32_t) creds->euid);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetId")) {
+ sd_id128_t server_id;
+ char buf[SD_ID128_STRING_MAX];
+
+ if (!sd_bus_message_has_signature(m, ""))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_get_bus_id(a, &server_id);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ return synthetic_reply_method_return(m, "s", sd_id128_to_string(server_id, buf));
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetNameOwner")) {
+ const char *name;
+ _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+
+ if (!sd_bus_message_has_signature(m, "s"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_message_read(m, "s", &name);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ if (streq(name, "org.freedesktop.DBus"))
+ return synthetic_reply_method_return(m, "s", "org.freedesktop.DBus");
+
+ r = get_creds_by_name(a, name, SD_BUS_CREDS_UNIQUE_NAME, &creds, &error);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, &error);
+
+ if (!(creds->mask & SD_BUS_CREDS_UNIQUE_NAME))
+ return synthetic_reply_method_errno(m, -EOPNOTSUPP, NULL);
+
+ return synthetic_reply_method_return(m, "s", creds->unique_name);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListActivatableNames")) {
+ _cleanup_strv_free_ char **names = NULL;
+
+ if (!sd_bus_message_has_signature(m, ""))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_list_names(a, NULL, &names);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ /* Let's sort the names list to make it stable */
+ strv_sort(names);
+
+ return synthetic_reply_method_return_strv(m, names);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListNames")) {
+ _cleanup_strv_free_ char **names = NULL;
+
+ if (!sd_bus_message_has_signature(m, ""))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_list_names(a, &names, NULL);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = strv_extend(&names, "org.freedesktop.DBus");
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ /* Let's sort the names list to make it stable */
+ strv_sort(names);
+
+ return synthetic_reply_method_return_strv(m, names);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListQueuedOwners")) {
+ struct kdbus_cmd_list cmd = {
+ .flags = KDBUS_LIST_QUEUED,
+ .size = sizeof(cmd),
+ };
+ struct kdbus_info *name_list, *name;
+ _cleanup_strv_free_ char **owners = NULL;
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ char *arg0;
+ int err = 0;
+
+ if (!sd_bus_message_has_signature(m, "s"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_message_read(m, "s", &arg0);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_get_name_creds(a, arg0, 0, NULL);
+ if (r == -ESRCH || r == -ENXIO) {
+ sd_bus_error_setf(&error, SD_BUS_ERROR_NAME_HAS_NO_OWNER, "Could not get owners of name '%s': no such name.", arg0);
+ return synthetic_reply_method_errno(m, r, &error);
+ }
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = ioctl(a->input_fd, KDBUS_CMD_LIST, &cmd);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, -errno, NULL);
+
+ name_list = (struct kdbus_info *) ((uint8_t *) a->kdbus_buffer + cmd.offset);
+
+ KDBUS_FOREACH(name, name_list, cmd.list_size) {
+ struct kdbus_item *item;
+ char *n;
+
+ KDBUS_ITEM_FOREACH(item, name, items) {
+ if (item->type == KDBUS_ITEM_OWNED_NAME) {
+ if (!streq_ptr(item->name.name, arg0))
+ continue;
+
+ if (asprintf(&n, ":1.%llu", (unsigned long long) name->id) < 0) {
+ err = -ENOMEM;
+ break;
+ }
+
+ r = strv_consume(&owners, n);
+ if (r < 0) {
+ err = r;
+ break;
+ }
+ }
+ }
+
+ if (err < 0)
+ break;
+ }
+
+ r = bus_kernel_cmd_free(a, cmd.offset);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ if (err < 0)
+ return synthetic_reply_method_errno(m, err, NULL);
+
+ return synthetic_reply_method_return_strv(m, owners);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "NameHasOwner")) {
+ const char *name;
+
+ if (!sd_bus_message_has_signature(m, "s"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_message_read(m, "s", &name);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ if (streq(name, "org.freedesktop.DBus"))
+ return synthetic_reply_method_return(m, "b", true);
+
+ r = sd_bus_get_name_creds(a, name, 0, NULL);
+ if (r < 0 && r != -ESRCH && r != -ENXIO)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ return synthetic_reply_method_return(m, "b", r >= 0);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ReleaseName")) {
+ const char *name;
+
+ if (!sd_bus_message_has_signature(m, "s"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_message_read(m, "s", &name);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_release_name(a, name);
+ if (r < 0) {
+ if (r == -ESRCH)
+ return synthetic_reply_method_return(m, "u", BUS_NAME_NON_EXISTENT);
+ if (r == -EADDRINUSE)
+ return synthetic_reply_method_return(m, "u", BUS_NAME_NOT_OWNER);
+
+ return synthetic_reply_method_errno(m, r, NULL);
+ }
+
+ set_remove(owned_names, (char*) name);
+
+ return synthetic_reply_method_return(m, "u", BUS_NAME_RELEASED);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ReloadConfig")) {
+ if (!sd_bus_message_has_signature(m, ""))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = shared_policy_reload(sp);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ return synthetic_reply_method_return(m, NULL);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "RequestName")) {
+ const char *name;
+ uint32_t flags, param;
+ bool in_queue;
+
+ if (!sd_bus_message_has_signature(m, "su"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_message_read(m, "su", &name, &flags);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ if (sp) {
+ Policy *policy;
+ bool denied;
+
+ policy = shared_policy_acquire(sp);
+ denied = !policy_check_own(policy, ucred->uid, ucred->gid, name);
+ shared_policy_release(sp, policy);
+ if (denied)
+ return synthetic_reply_method_errno(m, -EPERM, NULL);
+ }
+
+ if ((flags & ~(BUS_NAME_ALLOW_REPLACEMENT|BUS_NAME_REPLACE_EXISTING|BUS_NAME_DO_NOT_QUEUE)) != 0)
+ return synthetic_reply_method_errno(m, -EINVAL, NULL);
+
+ param = 0;
+ if (flags & BUS_NAME_ALLOW_REPLACEMENT)
+ param |= SD_BUS_NAME_ALLOW_REPLACEMENT;
+ if (flags & BUS_NAME_REPLACE_EXISTING)
+ param |= SD_BUS_NAME_REPLACE_EXISTING;
+ if (!(flags & BUS_NAME_DO_NOT_QUEUE))
+ param |= SD_BUS_NAME_QUEUE;
+
+ r = set_put_strdup(owned_names, name);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_request_name(a, name, param);
+ if (r < 0) {
+ if (r == -EALREADY)
+ return synthetic_reply_method_return(m, "u", BUS_NAME_ALREADY_OWNER);
+
+ set_remove(owned_names, (char*) name);
+
+ if (r == -EEXIST)
+ return synthetic_reply_method_return(m, "u", BUS_NAME_EXISTS);
+ return synthetic_reply_method_errno(m, r, NULL);
+ }
+
+ in_queue = (r == 0);
+
+ if (in_queue)
+ return synthetic_reply_method_return(m, "u", BUS_NAME_IN_QUEUE);
+
+ return synthetic_reply_method_return(m, "u", BUS_NAME_PRIMARY_OWNER);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "StartServiceByName")) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *msg = NULL;
+ ProxyActivation *activation;
+ const char *name;
+ uint64_t cookie;
+ uint32_t flags;
+
+ if (!sd_bus_message_has_signature(m, "su"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_message_read(m, "su", &name, &flags);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ if (flags != 0)
+ return synthetic_reply_method_errno(m, -EINVAL, NULL);
+
+ r = sd_bus_get_name_creds(a, name, 0, NULL);
+ if (r >= 0 || streq(name, "org.freedesktop.DBus"))
+ return synthetic_reply_method_return(m, "u", BUS_START_REPLY_ALREADY_RUNNING);
+ if (r != -ESRCH)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ if (p->n_activations >= PROXY_ACTIVATIONS_MAX)
+ return synthetic_reply_method_errno(m, -EMFILE, NULL);
+
+ r = sd_bus_message_get_cookie(m, &cookie);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_message_new_method_call(a,
+ &msg,
+ name,
+ "/",
+ "org.freedesktop.DBus.Peer",
+ "Ping");
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = bus_message_seal(msg, cookie, BUS_DEFAULT_TIMEOUT);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ activation = new0(ProxyActivation, 1);
+ if (!activation)
+ return synthetic_reply_method_errno(m, -ENOMEM, NULL);
+
+ r = sd_bus_call_async(a,
+ &activation->slot,
+ msg,
+ driver_activation,
+ activation,
+ 0);
+ if (r < 0) {
+ free(activation);
+ return synthetic_reply_method_errno(m, r, NULL);
+ }
+
+ activation->proxy = p;
+ activation->request = sd_bus_message_ref(m);
+ LIST_PREPEND(activations_by_proxy, p->activations, activation);
+ ++p->n_activations;
+ return 1;
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "UpdateActivationEnvironment")) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *msg = NULL;
+ _cleanup_strv_free_ char **args = NULL;
+
+ if (!sd_bus_message_has_signature(m, "a{ss}"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{ss}");
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "ss")) > 0) {
+ _cleanup_free_ char *s = NULL;
+ const char *key;
+ const char *value;
+
+ r = sd_bus_message_read(m, "ss", &key, &value);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ s = strjoin(key, "=", value, NULL);
+ if (!s)
+ return synthetic_reply_method_errno(m, -ENOMEM, NULL);
+
+ if (!env_assignment_is_valid(s)) {
+ log_warning("UpdateActivationEnvironment() called with invalid assignment, discarding: %s", s);
+ } else {
+ r = strv_extend(&args, s);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+ }
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+ }
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ if (strv_isempty(args)) /* nothing to do? */
+ return synthetic_reply_method_return(m, NULL);
+
+ r = sd_bus_message_new_method_call(
+ a,
+ &msg,
+ "org.freedesktop.systemd1",
+ "/org/freedesktop/systemd1",
+ "org.freedesktop.systemd1.Manager",
+ "SetEnvironment");
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_message_append_strv(msg, args);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_call(a, msg, 0, NULL, NULL);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ return synthetic_reply_method_return(m, NULL);
+
+ } else {
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+
+ r = sd_bus_error_setf(&error, SD_BUS_ERROR_UNKNOWN_METHOD, "Unknown method '%s'.", m->member);
+
+ return synthetic_reply_method_errno(m, r, &error);
+ }
+}
diff --git a/src/libbus-proxy-core/driver.h b/src/libbus-proxy-core/driver.h
new file mode 100644
index 0000000000..cad7aa7851
--- /dev/null
+++ b/src/libbus-proxy-core/driver.h
@@ -0,0 +1,27 @@
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2014 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 <systemd/sd-bus.h>
+
+#include "bus-xml-policy.h"
+#include "proxy.h"
+
+int bus_proxy_process_driver(Proxy *p, sd_bus *a, sd_bus *b, sd_bus_message *m, SharedPolicy *sp, const struct ucred *ucred, Set *owned_names);
diff --git a/src/libbus-proxy-core/proxy.c b/src/libbus-proxy-core/proxy.c
new file mode 100644
index 0000000000..bcfbab0dad
--- /dev/null
+++ b/src/libbus-proxy-core/proxy.c
@@ -0,0 +1,953 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+ Copyright 2013 Daniel Mack
+ Copyright 2014 Kay Sievers
+ Copyright 2014 David Herrmann
+
+ 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 <errno.h>
+#include <poll.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+
+#include <systemd/sd-bus.h>
+#include <systemd/sd-daemon.h>
+
+#include "alloc-util.h"
+#include "bus-control.h"
+#include "bus-internal.h"
+#include "bus-message.h"
+#include "bus-util.h"
+#include "bus-xml-policy.h"
+#include "driver.h"
+#include "fd-util.h"
+#include "formats-util.h"
+#include "log.h"
+#include "proxy.h"
+#include "set.h"
+#include "strv.h"
+#include "synthesize.h"
+#include "user-util.h"
+#include "util.h"
+
+static int proxy_create_destination(Proxy *p, const char *destination, const char *local_sec, bool negotiate_fds) {
+ _cleanup_(sd_bus_flush_close_unrefp) sd_bus *b = NULL;
+ int r;
+
+ r = sd_bus_new(&b);
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate bus: %m");
+
+ r = sd_bus_set_description(b, "sd-proxy");
+ if (r < 0)
+ return log_error_errno(r, "Failed to set bus name: %m");
+
+ r = sd_bus_set_address(b, destination);
+ if (r < 0)
+ return log_error_errno(r, "Failed to set address to connect to: %m");
+
+ r = sd_bus_negotiate_fds(b, negotiate_fds);
+ if (r < 0)
+ return log_error_errno(r, "Failed to set FD negotiation: %m");
+
+ r = sd_bus_negotiate_creds(b, true, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID|SD_BUS_CREDS_EGID|SD_BUS_CREDS_SELINUX_CONTEXT);
+ if (r < 0)
+ return log_error_errno(r, "Failed to set credential negotiation: %m");
+
+ if (p->local_creds.pid > 0) {
+ b->fake_pids.pid = p->local_creds.pid;
+ b->fake_pids_valid = true;
+
+ b->fake_creds.uid = UID_INVALID;
+ b->fake_creds.euid = p->local_creds.uid;
+ b->fake_creds.suid = UID_INVALID;
+ b->fake_creds.fsuid = UID_INVALID;
+ b->fake_creds.gid = GID_INVALID;
+ b->fake_creds.egid = p->local_creds.gid;
+ b->fake_creds.sgid = GID_INVALID;
+ b->fake_creds.fsgid = GID_INVALID;
+ b->fake_creds_valid = true;
+ }
+
+ if (local_sec) {
+ b->fake_label = strdup(local_sec);
+ if (!b->fake_label)
+ return log_oom();
+ }
+
+ b->manual_peer_interface = true;
+
+ r = sd_bus_start(b);
+ if (r < 0)
+ return log_error_errno(r, "Failed to start bus client: %m");
+
+ p->destination_bus = b;
+ b = NULL;
+ return 0;
+}
+
+static int proxy_create_local(Proxy *p, bool negotiate_fds) {
+ sd_id128_t server_id;
+ sd_bus *b;
+ int r;
+
+ r = sd_bus_new(&b);
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate bus: %m");
+
+ r = sd_bus_set_fd(b, p->local_in, p->local_out);
+ if (r < 0) {
+ sd_bus_unref(b);
+ return log_error_errno(r, "Failed to set fds: %m");
+ }
+
+ /* The fds are now owned by the bus, and we indicate that by
+ * storing the bus object in the proxy object. */
+ p->local_bus = b;
+
+ r = sd_bus_get_bus_id(p->destination_bus, &server_id);
+ if (r < 0)
+ return log_error_errno(r, "Failed to get server ID: %m");
+
+ r = sd_bus_set_server(b, 1, server_id);
+ if (r < 0)
+ return log_error_errno(r, "Failed to set server mode: %m");
+
+ r = sd_bus_negotiate_fds(b, negotiate_fds);
+ if (r < 0)
+ return log_error_errno(r, "Failed to set FD negotiation: %m");
+
+ r = sd_bus_negotiate_creds(b, true, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID|SD_BUS_CREDS_EGID|SD_BUS_CREDS_SELINUX_CONTEXT);
+ if (r < 0)
+ return log_error_errno(r, "Failed to set credential negotiation: %m");
+
+ r = sd_bus_set_anonymous(b, true);
+ if (r < 0)
+ return log_error_errno(r, "Failed to set anonymous authentication: %m");
+
+ b->manual_peer_interface = true;
+
+ r = sd_bus_start(b);
+ if (r < 0)
+ return log_error_errno(r, "Failed to start bus client: %m");
+
+ return 0;
+}
+
+static int proxy_match_synthetic(sd_bus_message *m, void *userdata, sd_bus_error *error) {
+ Proxy *p = userdata;
+
+ p->synthetic_matched = true;
+ return 0; /* make sure to continue processing it in further handlers */
+}
+
+/*
+ * We always need NameOwnerChanged so we can synthesize NameLost and
+ * NameAcquired. Furthermore, dbus-1 always passes unicast-signals through, so
+ * subscribe unconditionally.
+ */
+static int proxy_prepare_matches(Proxy *p) {
+ _cleanup_free_ char *match = NULL;
+ const char *unique;
+ int r;
+
+ if (!p->destination_bus->is_kernel)
+ return 0;
+
+ r = sd_bus_get_unique_name(p->destination_bus, &unique);
+ if (r < 0)
+ return log_error_errno(r, "Failed to get unique name: %m");
+
+ match = strjoin("type='signal',"
+ "sender='org.freedesktop.DBus',"
+ "path='/org/freedesktop/DBus',"
+ "interface='org.freedesktop.DBus',"
+ "member='NameOwnerChanged',"
+ "arg1='",
+ unique,
+ "'",
+ NULL);
+ if (!match)
+ return log_oom();
+
+ r = sd_bus_add_match(p->destination_bus, NULL, match, proxy_match_synthetic, p);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add match for NameLost: %m");
+
+ free(match);
+ match = strjoin("type='signal',"
+ "sender='org.freedesktop.DBus',"
+ "path='/org/freedesktop/DBus',"
+ "interface='org.freedesktop.DBus',"
+ "member='NameOwnerChanged',"
+ "arg2='",
+ unique,
+ "'",
+ NULL);
+ if (!match)
+ return log_oom();
+
+ r = sd_bus_add_match(p->destination_bus, NULL, match, proxy_match_synthetic, p);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add match for NameAcquired: %m");
+
+ free(match);
+ match = strjoin("type='signal',"
+ "destination='",
+ unique,
+ "'",
+ NULL);
+ if (!match)
+ return log_oom();
+
+ r = sd_bus_add_match(p->destination_bus, NULL, match, proxy_match_synthetic, p);
+ if (r < 0)
+ log_error_errno(r, "Failed to add match for directed signals: %m");
+ /* FIXME: temporarily ignore error to support older kdbus versions */
+
+ return 0;
+}
+
+int proxy_new(Proxy **out, int in_fd, int out_fd, const char *destination) {
+ _cleanup_(proxy_freep) Proxy *p = NULL;
+ _cleanup_free_ char *local_sec = NULL;
+ bool is_unix;
+ int r;
+
+ /* This takes possession/destroys the file descriptors passed
+ * in even on failure. The caller should hence forget about
+ * the fds in all cases after calling this function and not
+ * close them. */
+
+ p = new0(Proxy, 1);
+ if (!p) {
+ safe_close(in_fd);
+ safe_close(out_fd);
+ return log_oom();
+ }
+
+ p->local_in = in_fd;
+ p->local_out = out_fd;
+
+ p->owned_names = set_new(&string_hash_ops);
+ if (!p->owned_names)
+ return log_oom();
+
+ is_unix = sd_is_socket(in_fd, AF_UNIX, 0, 0) > 0 &&
+ sd_is_socket(out_fd, AF_UNIX, 0, 0) > 0;
+
+ if (is_unix) {
+ (void) getpeercred(in_fd, &p->local_creds);
+ (void) getpeersec(in_fd, &local_sec);
+ }
+
+ r = proxy_create_destination(p, destination, local_sec, is_unix);
+ if (r < 0)
+ return r;
+
+ r = proxy_create_local(p, is_unix);
+ if (r < 0)
+ return r;
+
+ r = proxy_prepare_matches(p);
+ if (r < 0)
+ return r;
+
+ *out = p;
+ p = NULL;
+
+ return 0;
+}
+
+Proxy *proxy_free(Proxy *p) {
+ ProxyActivation *activation;
+
+ if (!p)
+ return NULL;
+
+ while ((activation = p->activations)) {
+ LIST_REMOVE(activations_by_proxy, p->activations, activation);
+ sd_bus_message_unref(activation->request);
+ sd_bus_slot_unref(activation->slot);
+ free(activation);
+ }
+
+ if (p->local_bus)
+ sd_bus_flush_close_unref(p->local_bus);
+ else {
+ safe_close(p->local_in);
+ if (p->local_out != p->local_in)
+ safe_close(p->local_out);
+ }
+
+ sd_bus_flush_close_unref(p->destination_bus);
+ set_free_free(p->owned_names);
+ free(p);
+
+ return NULL;
+}
+
+int proxy_set_policy(Proxy *p, SharedPolicy *sp, char **configuration) {
+ _cleanup_strv_free_ char **strv = NULL;
+ Policy *policy;
+ int r;
+
+ assert(p);
+ assert(sp);
+
+ /* no need to load legacy policy if destination is not kdbus */
+ if (!p->destination_bus->is_kernel)
+ return 0;
+
+ p->policy = sp;
+
+ policy = shared_policy_acquire(sp);
+ if (policy) {
+ /* policy already pre-loaded */
+ shared_policy_release(sp, policy);
+ return 0;
+ }
+
+ if (!configuration) {
+ const char *scope;
+
+ r = sd_bus_get_scope(p->destination_bus, &scope);
+ if (r < 0)
+ return log_error_errno(r, "Couldn't determine bus scope: %m");
+
+ if (streq(scope, "system"))
+ strv = strv_new("/usr/share/dbus-1/system.conf",
+ "/etc/dbus-1/system.conf",
+ "/usr/share/dbus-1/system.d/",
+ "/etc/dbus-1/system.d/",
+ "/etc/dbus-1/system-local.conf",
+ NULL);
+ else if (streq(scope, "user"))
+ strv = strv_new("/usr/share/dbus-1/session.conf",
+ "/etc/dbus-1/session.conf",
+ "/usr/share/dbus-1/session.d/",
+ "/etc/dbus-1/session.d/",
+ "/etc/dbus-1/session-local.conf",
+ NULL);
+ else
+ return log_error("Unknown scope %s, don't know which policy to load. Refusing.", scope);
+
+ if (!strv)
+ return log_oom();
+
+ configuration = strv;
+ }
+
+ return shared_policy_preload(sp, configuration);
+}
+
+int proxy_hello_policy(Proxy *p, uid_t original_uid) {
+ Policy *policy;
+ int r = 0;
+
+ assert(p);
+
+ if (!p->policy)
+ return 0;
+
+ policy = shared_policy_acquire(p->policy);
+
+ if (p->local_creds.uid == original_uid)
+ log_debug("Permitting access, since bus owner matches bus client.");
+ else if (policy_check_hello(policy, p->local_creds.uid, p->local_creds.gid))
+ log_debug("Permitting access due to XML policy.");
+ else
+ r = log_error_errno(EPERM, "Policy denied connection.");
+
+ shared_policy_release(p->policy, policy);
+
+ return r;
+}
+
+static int proxy_wait(Proxy *p) {
+ uint64_t timeout_destination, timeout_local, t;
+ int events_destination, events_local, fd;
+ struct timespec _ts, *ts;
+ struct pollfd *pollfd;
+ int r;
+
+ assert(p);
+
+ fd = sd_bus_get_fd(p->destination_bus);
+ if (fd < 0)
+ return log_error_errno(fd, "Failed to get fd: %m");
+
+ events_destination = sd_bus_get_events(p->destination_bus);
+ if (events_destination < 0)
+ return log_error_errno(events_destination, "Failed to get events mask: %m");
+
+ r = sd_bus_get_timeout(p->destination_bus, &timeout_destination);
+ if (r < 0)
+ return log_error_errno(r, "Failed to get timeout: %m");
+
+ events_local = sd_bus_get_events(p->local_bus);
+ if (events_local < 0)
+ return log_error_errno(events_local, "Failed to get events mask: %m");
+
+ r = sd_bus_get_timeout(p->local_bus, &timeout_local);
+ if (r < 0)
+ return log_error_errno(r, "Failed to get timeout: %m");
+
+ t = timeout_destination;
+ if (t == (uint64_t) -1 || (timeout_local != (uint64_t) -1 && timeout_local < timeout_destination))
+ t = timeout_local;
+
+ if (t == (uint64_t) -1)
+ ts = NULL;
+ else {
+ usec_t nw;
+
+ nw = now(CLOCK_MONOTONIC);
+ if (t > nw)
+ t -= nw;
+ else
+ t = 0;
+
+ ts = timespec_store(&_ts, t);
+ }
+
+ pollfd = (struct pollfd[3]) {
+ { .fd = fd, .events = events_destination, },
+ { .fd = p->local_in, .events = events_local & POLLIN, },
+ { .fd = p->local_out, .events = events_local & POLLOUT, },
+ };
+
+ r = ppoll(pollfd, 3, ts, NULL);
+ if (r < 0)
+ return log_error_errno(errno, "ppoll() failed: %m");
+
+ return 0;
+}
+
+static int handle_policy_error(sd_bus_message *m, int r) {
+ if (r == -ESRCH || r == -ENXIO)
+ return synthetic_reply_method_errorf(m, SD_BUS_ERROR_NAME_HAS_NO_OWNER, "Name %s is currently not owned by anyone.", m->destination);
+
+ return r;
+}
+
+static int process_policy_unlocked(sd_bus *from, sd_bus *to, sd_bus_message *m, Policy *policy, const struct ucred *our_ucred, Set *owned_names) {
+ int r;
+
+ assert(from);
+ assert(to);
+ assert(m);
+
+ if (!policy)
+ return 0;
+
+ /*
+ * dbus-1 distinguishes expected and non-expected replies by tracking
+ * method-calls and timeouts. By default, DENY rules are *NEVER* applied
+ * on expected replies, unless explicitly specified. But we dont track
+ * method-calls, thus, we cannot know whether a reply is expected.
+ * Fortunately, the kdbus forbids non-expected replies, so we can safely
+ * ignore any policy on those and let the kernel deal with it.
+ *
+ * TODO: To be correct, we should only ignore policy-tags that are
+ * applied on non-expected replies. However, so far we don't parse those
+ * tags so we let everything pass. I haven't seen a DENY policy tag on
+ * expected-replies, ever, so don't bother..
+ */
+ if (m->reply_cookie > 0)
+ return 0;
+
+ if (from->is_kernel) {
+ uid_t sender_uid = UID_INVALID;
+ gid_t sender_gid = GID_INVALID;
+ char **sender_names = NULL;
+
+ /* Driver messages are always OK */
+ if (streq_ptr(m->sender, "org.freedesktop.DBus"))
+ return 0;
+
+ /* The message came from the kernel, and is sent to our legacy client. */
+ (void) sd_bus_creds_get_well_known_names(&m->creds, &sender_names);
+
+ (void) sd_bus_creds_get_euid(&m->creds, &sender_uid);
+ (void) sd_bus_creds_get_egid(&m->creds, &sender_gid);
+
+ if (sender_uid == UID_INVALID || sender_gid == GID_INVALID) {
+ _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *sender_creds = NULL;
+
+ /* If the message came from another legacy
+ * client, then the message creds will be
+ * missing, simply because on legacy clients
+ * per-message creds were unknown. In this
+ * case, query the creds of the peer
+ * instead. */
+
+ r = bus_get_name_creds_kdbus(from, m->sender, SD_BUS_CREDS_EUID|SD_BUS_CREDS_EGID, true, &sender_creds);
+ if (r < 0)
+ return handle_policy_error(m, r);
+
+ (void) sd_bus_creds_get_euid(sender_creds, &sender_uid);
+ (void) sd_bus_creds_get_egid(sender_creds, &sender_gid);
+ }
+
+ /* First check whether the sender can send the message to our name */
+ if (policy_check_send(policy, sender_uid, sender_gid, m->header->type, owned_names, NULL, m->path, m->interface, m->member, false, NULL) &&
+ policy_check_recv(policy, our_ucred->uid, our_ucred->gid, m->header->type, NULL, sender_names, m->path, m->interface, m->member, false))
+ return 0;
+
+ /* Return an error back to the caller */
+ if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL)
+ return synthetic_reply_method_errorf(m, SD_BUS_ERROR_ACCESS_DENIED, "Access prohibited by XML receiver policy.");
+
+ /* Return 1, indicating that the message shall not be processed any further */
+ return 1;
+ }
+
+ if (to->is_kernel) {
+ _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *destination_creds = NULL;
+ uid_t destination_uid = UID_INVALID;
+ gid_t destination_gid = GID_INVALID;
+ const char *destination_unique = NULL;
+ char **destination_names = NULL;
+ char *n;
+
+ /* Driver messages are always OK */
+ if (streq_ptr(m->destination, "org.freedesktop.DBus"))
+ return 0;
+
+ /* The message came from the legacy client, and is sent to kdbus. */
+ if (m->destination) {
+ r = bus_get_name_creds_kdbus(to, m->destination,
+ SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME|
+ SD_BUS_CREDS_EUID|SD_BUS_CREDS_EGID|SD_BUS_CREDS_PID,
+ true, &destination_creds);
+ if (r < 0)
+ return handle_policy_error(m, r);
+
+ r = sd_bus_creds_get_unique_name(destination_creds, &destination_unique);
+ if (r < 0)
+ return handle_policy_error(m, r);
+
+ (void) sd_bus_creds_get_well_known_names(destination_creds, &destination_names);
+
+ (void) sd_bus_creds_get_euid(destination_creds, &destination_uid);
+ (void) sd_bus_creds_get_egid(destination_creds, &destination_gid);
+ }
+
+ /* First check if we (the sender) can send to this name */
+ if (sd_bus_message_is_signal(m, NULL, NULL)) {
+ /* If we forward a signal from dbus-1 to kdbus, we have
+ * no idea who the recipient is. Therefore, we cannot
+ * apply any dbus-1 policies that match on receiver
+ * credentials. We know sd-bus always sets
+ * KDBUS_MSG_SIGNAL, so the kernel applies policies to
+ * the message. Therefore, skip policy checks in this
+ * case. */
+ return 0;
+ } else if (policy_check_send(policy, our_ucred->uid, our_ucred->gid, m->header->type, NULL, destination_names, m->path, m->interface, m->member, true, &n)) {
+ if (n) {
+ /* If we made a receiver decision, then remember which
+ * name's policy we used, and to which unique ID it
+ * mapped when we made the decision. Then, let's pass
+ * this to the kernel when sending the message, so that
+ * it refuses the operation should the name and unique
+ * ID not map to each other anymore. */
+
+ r = free_and_strdup(&m->destination_ptr, n);
+ if (r < 0)
+ return r;
+
+ r = bus_kernel_parse_unique_name(destination_unique, &m->verify_destination_id);
+ if (r < 0)
+ return r;
+ }
+
+ if (policy_check_recv(policy, destination_uid, destination_gid, m->header->type, owned_names, NULL, m->path, m->interface, m->member, true))
+ return 0;
+ }
+
+ /* Return an error back to the caller */
+ if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL)
+ return synthetic_reply_method_errorf(m, SD_BUS_ERROR_ACCESS_DENIED, "Access prohibited by XML sender policy.");
+
+ /* Return 1, indicating that the message shall not be processed any further */
+ return 1;
+ }
+
+ return 0;
+}
+
+static int process_policy(sd_bus *from, sd_bus *to, sd_bus_message *m, SharedPolicy *sp, const struct ucred *our_ucred, Set *owned_names) {
+ Policy *policy;
+ int r;
+
+ assert(sp);
+
+ policy = shared_policy_acquire(sp);
+ r = process_policy_unlocked(from, to, m, policy, our_ucred, owned_names);
+ shared_policy_release(sp, policy);
+
+ return r;
+}
+
+static int process_hello(Proxy *p, sd_bus_message *m) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *n = NULL;
+ bool is_hello;
+ int r;
+
+ assert(p);
+ assert(m);
+
+ /* As reaction to hello we need to respond with two messages:
+ * the callback reply and the NameAcquired for the unique
+ * name, since hello is otherwise obsolete on kdbus. */
+
+ is_hello =
+ sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "Hello") &&
+ streq_ptr(m->destination, "org.freedesktop.DBus");
+
+ if (!is_hello) {
+ if (p->got_hello)
+ return 0;
+
+ return log_error_errno(EIO, "First packet isn't hello (it's %s.%s), aborting.", m->interface, m->member);
+ }
+
+ if (p->got_hello)
+ return log_error_errno(EIO, "Got duplicate hello, aborting.");
+
+ p->got_hello = true;
+
+ if (!p->destination_bus->is_kernel)
+ return 0;
+
+ r = sd_bus_message_new_method_return(m, &n);
+ if (r < 0)
+ return log_error_errno(r, "Failed to generate HELLO reply: %m");
+
+ r = sd_bus_message_append(n, "s", p->destination_bus->unique_name);
+ if (r < 0)
+ return log_error_errno(r, "Failed to append unique name to HELLO reply: %m");
+
+ r = bus_message_append_sender(n, "org.freedesktop.DBus");
+ if (r < 0)
+ return log_error_errno(r, "Failed to append sender to HELLO reply: %m");
+
+ r = bus_seal_synthetic_message(p->local_bus, n);
+ if (r < 0)
+ return log_error_errno(r, "Failed to seal HELLO reply: %m");
+
+ r = sd_bus_send(p->local_bus, n, NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to send HELLO reply: %m");
+
+ n = sd_bus_message_unref(n);
+ r = sd_bus_message_new_signal(
+ p->local_bus,
+ &n,
+ "/org/freedesktop/DBus",
+ "org.freedesktop.DBus",
+ "NameAcquired");
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate initial NameAcquired message: %m");
+
+ r = sd_bus_message_append(n, "s", p->destination_bus->unique_name);
+ if (r < 0)
+ return log_error_errno(r, "Failed to append unique name to NameAcquired message: %m");
+
+ r = bus_message_append_sender(n, "org.freedesktop.DBus");
+ if (r < 0)
+ return log_error_errno(r, "Failed to append sender to NameAcquired message: %m");
+
+ r = sd_bus_message_set_destination(n, p->destination_bus->unique_name);
+ if (r < 0)
+ return log_error_errno(r, "Failed to set destination for NameAcquired message: %m");
+
+ r = bus_seal_synthetic_message(p->local_bus, n);
+ if (r < 0)
+ return log_error_errno(r, "Failed to seal NameAcquired message: %m");
+
+ r = sd_bus_send(p->local_bus, n, NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to send NameAcquired message: %m");
+
+ return 1;
+}
+
+static int patch_sender(sd_bus *a, sd_bus_message *m) {
+ char **well_known = NULL;
+ sd_bus_creds *c;
+ int r;
+
+ assert(a);
+ assert(m);
+
+ if (!a->is_kernel)
+ return 0;
+
+ /* We will change the sender of messages from the bus driver
+ * so that they originate from the bus driver. This is a
+ * speciality originating from dbus1, where the bus driver did
+ * not have a unique id, but only the well-known name. */
+
+ c = sd_bus_message_get_creds(m);
+ if (!c)
+ return 0;
+
+ r = sd_bus_creds_get_well_known_names(c, &well_known);
+ if (r < 0)
+ return r;
+
+ if (strv_contains(well_known, "org.freedesktop.DBus"))
+ m->sender = "org.freedesktop.DBus";
+
+ return 0;
+}
+
+static int proxy_process_destination_to_local(Proxy *p) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
+ bool matched, matched_synthetic;
+ int r;
+
+ assert(p);
+
+ /*
+ * Usually, we would just take any message that the bus passes to us
+ * and forward it to the local connection. However, there are actually
+ * applications that fail if they receive broadcasts that they didn't
+ * subscribe to. Therefore, we actually emulate a real broadcast
+ * matching here, and discard any broadcasts that weren't matched. Our
+ * match-handlers remembers whether a message was matched by any rule,
+ * by marking it in @p->message_matched.
+ */
+
+ r = sd_bus_process(p->destination_bus, &m);
+
+ matched = p->message_matched;
+ matched_synthetic = p->synthetic_matched;
+ p->message_matched = false;
+ p->synthetic_matched = false;
+
+ if (r == -ECONNRESET || r == -ENOTCONN) /* Treat 'connection reset by peer' as clean exit condition */
+ return r;
+ if (r < 0) {
+ log_error_errno(r, "Failed to process destination bus: %m");
+ return r;
+ }
+ if (r == 0)
+ return 0;
+ if (!m)
+ return 1;
+
+ /* We officially got EOF, let's quit */
+ if (sd_bus_message_is_signal(m, "org.freedesktop.DBus.Local", "Disconnected"))
+ return -ECONNRESET;
+
+ r = synthesize_name_acquired(p, p->destination_bus, p->local_bus, m);
+ if (r == -ECONNRESET || r == -ENOTCONN)
+ return r;
+ if (r < 0)
+ return log_error_errno(r, "Failed to synthesize message: %m");
+
+ /* discard broadcasts that were not matched by any MATCH rule */
+ if (!matched && !sd_bus_message_get_destination(m)) {
+ if (!matched_synthetic)
+ log_debug("Dropped unmatched broadcast: uid=" UID_FMT " gid=" GID_FMT " pid=" PID_FMT " message=%s path=%s interface=%s member=%s sender=%s destination=%s",
+ p->local_creds.uid, p->local_creds.gid, p->local_creds.pid, bus_message_type_to_string(m->header->type),
+ strna(m->path), strna(m->interface), strna(m->member), strna(m->sender), strna(m->destination));
+ return 1;
+ }
+
+ patch_sender(p->destination_bus, m);
+
+ if (p->policy) {
+ r = process_policy(p->destination_bus, p->local_bus, m, p->policy, &p->local_creds, p->owned_names);
+ if (r == -ECONNRESET || r == -ENOTCONN)
+ return r;
+ if (r < 0)
+ return log_error_errno(r, "Failed to process policy: %m");
+ if (r > 0)
+ return 1;
+ }
+
+ r = sd_bus_send(p->local_bus, m, NULL);
+ if (r < 0) {
+ if (r == -ECONNRESET || r == -ENOTCONN)
+ return r;
+
+ /* If the peer tries to send a reply and it is
+ * rejected with EBADSLT by the kernel, we ignore the
+ * error. This catches cases where the original
+ * method-call didn't had EXPECT_REPLY set, but the
+ * proxy-peer still sends a reply. This is allowed in
+ * dbus1, but not in kdbus. We don't want to track
+ * reply-windows in the proxy, so we simply ignore
+ * EBADSLT for all replies. The only downside is, that
+ * callers are no longer notified if their replies are
+ * dropped. However, this is equivalent to the
+ * caller's timeout to expire, so this should be
+ * acceptable. Nobody sane sends replies without a
+ * matching method-call, so nobody should care. */
+
+ /* FIXME: remove -EPERM when kdbus is updated */
+ if ((r == -EPERM || r == -EBADSLT) && m->reply_cookie > 0)
+ return 1;
+
+ /* Return the error to the client, if we can */
+ synthetic_reply_method_errnof(m, r, "Failed to forward message we got from destination: %m");
+ if (r == -ENOBUFS) {
+ /* if local dbus1 peer does not dispatch its queue, warn only once */
+ if (!p->queue_overflow)
+ log_error("Dropped messages due to queue overflow of local peer (pid: "PID_FMT" uid: "UID_FMT")", p->local_creds.pid, p->local_creds.uid);
+ p->queue_overflow = true;
+ } else
+ log_error_errno(r,
+ "Failed to forward message we got from destination: uid=" UID_FMT " gid=" GID_FMT" message=%s destination=%s path=%s interface=%s member=%s: %m",
+ p->local_creds.uid, p->local_creds.gid, bus_message_type_to_string(m->header->type),
+ strna(m->destination), strna(m->path), strna(m->interface), strna(m->member));
+
+ return 1;
+ }
+
+ p->queue_overflow = false;
+ return 1;
+}
+
+static int proxy_process_local_to_destination(Proxy *p) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
+ int r;
+
+ assert(p);
+
+ r = sd_bus_process(p->local_bus, &m);
+ if (r == -ECONNRESET || r == -ENOTCONN) /* Treat 'connection reset by peer' as clean exit condition */
+ return r;
+ if (r < 0) {
+ log_error_errno(r, "Failed to process local bus: %m");
+ return r;
+ }
+ if (r == 0)
+ return 0;
+ if (!m)
+ return 1;
+
+ /* We officially got EOF, let's quit */
+ if (sd_bus_message_is_signal(m, "org.freedesktop.DBus.Local", "Disconnected"))
+ return -ECONNRESET;
+
+ r = process_hello(p, m);
+ if (r == -ECONNRESET || r == -ENOTCONN)
+ return r;
+ if (r < 0)
+ return log_error_errno(r, "Failed to process HELLO: %m");
+ if (r > 0)
+ return 1;
+
+ r = bus_proxy_process_driver(p, p->destination_bus, p->local_bus, m, p->policy, &p->local_creds, p->owned_names);
+ if (r == -ECONNRESET || r == -ENOTCONN)
+ return r;
+ if (r < 0)
+ return log_error_errno(r, "Failed to process driver calls: %m");
+ if (r > 0)
+ return 1;
+
+ for (;;) {
+ if (p->policy) {
+ r = process_policy(p->local_bus, p->destination_bus, m, p->policy, &p->local_creds, p->owned_names);
+ if (r == -ECONNRESET || r == -ENOTCONN)
+ return r;
+ if (r < 0)
+ return log_error_errno(r, "Failed to process policy: %m");
+ if (r > 0)
+ return 1;
+ }
+
+ r = sd_bus_send(p->destination_bus, m, NULL);
+ if (r < 0) {
+ if (r == -ECONNRESET || r == -ENOTCONN)
+ return r;
+
+ /* The name database changed since the policy check, hence let's check again */
+ if (r == -EREMCHG)
+ continue;
+
+ /* see above why EBADSLT is ignored for replies */
+ if ((r == -EPERM || r == -EBADSLT) && m->reply_cookie > 0)
+ return 1;
+
+ synthetic_reply_method_errnof(m, r, "Failed to forward message we got from local: %m");
+ log_error_errno(r,
+ "Failed to forward message we got from local: uid=" UID_FMT " gid=" GID_FMT" message=%s destination=%s path=%s interface=%s member=%s: %m",
+ p->local_creds.uid, p->local_creds.gid, bus_message_type_to_string(m->header->type),
+ strna(m->destination), strna(m->path), strna(m->interface), strna(m->member));
+ return 1;
+ }
+
+ break;
+ }
+
+ return 1;
+}
+
+int proxy_match(sd_bus_message *m, void *userdata, sd_bus_error *error) {
+ Proxy *p = userdata;
+
+ p->message_matched = true;
+ return 0; /* make sure to continue processing it in further handlers */
+}
+
+int proxy_run(Proxy *p) {
+ int r;
+
+ assert(p);
+
+ for (;;) {
+ bool busy = false;
+
+ if (p->got_hello) {
+ /* Read messages from bus, to pass them on to our client */
+ r = proxy_process_destination_to_local(p);
+ if (r == -ECONNRESET || r == -ENOTCONN)
+ return 0;
+ if (r < 0)
+ return r;
+ if (r > 0)
+ busy = true;
+ }
+
+ /* Read messages from our client, to pass them on to the bus */
+ r = proxy_process_local_to_destination(p);
+ if (r == -ECONNRESET || r == -ENOTCONN)
+ return 0;
+ if (r < 0)
+ return r;
+ if (r > 0)
+ busy = true;
+
+ if (!busy) {
+ r = proxy_wait(p);
+ if (r == -ECONNRESET || r == -ENOTCONN)
+ return 0;
+ if (r < 0)
+ return r;
+ }
+ }
+
+ return 0;
+}
diff --git a/src/libbus-proxy-core/proxy.h b/src/libbus-proxy-core/proxy.h
new file mode 100644
index 0000000000..0e3ed8a87a
--- /dev/null
+++ b/src/libbus-proxy-core/proxy.h
@@ -0,0 +1,66 @@
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2014 David Herrmann
+
+ 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 <systemd/sd-bus.h>
+
+#include "bus-xml-policy.h"
+
+typedef struct Proxy Proxy;
+typedef struct ProxyActivation ProxyActivation;
+
+#define PROXY_ACTIVATIONS_MAX (16) /* max parallel activation requests */
+
+struct Proxy {
+ sd_bus *local_bus;
+ struct ucred local_creds;
+ int local_in;
+ int local_out;
+
+ sd_bus *destination_bus;
+
+ Set *owned_names;
+ SharedPolicy *policy;
+
+ LIST_HEAD(ProxyActivation, activations);
+ size_t n_activations;
+
+ bool got_hello : 1;
+ bool queue_overflow : 1;
+ bool message_matched : 1;
+ bool synthetic_matched : 1;
+};
+
+struct ProxyActivation {
+ LIST_FIELDS(ProxyActivation, activations_by_proxy);
+ Proxy *proxy;
+ sd_bus_message *request;
+ sd_bus_slot *slot;
+};
+
+int proxy_new(Proxy **out, int in_fd, int out_fd, const char *dest);
+Proxy *proxy_free(Proxy *p);
+
+int proxy_set_policy(Proxy *p, SharedPolicy *policy, char **configuration);
+int proxy_hello_policy(Proxy *p, uid_t original_uid);
+int proxy_match(sd_bus_message *m, void *userdata, sd_bus_error *error);
+int proxy_run(Proxy *p);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(Proxy*, proxy_free);
diff --git a/src/libbus-proxy-core/synthesize.c b/src/libbus-proxy-core/synthesize.c
new file mode 100644
index 0000000000..7562f29ecb
--- /dev/null
+++ b/src/libbus-proxy-core/synthesize.c
@@ -0,0 +1,225 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+ Copyright 2013 Daniel Mack
+ Copyright 2014 Kay Sievers
+
+ 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 <stddef.h>
+
+#include <systemd/sd-bus.h>
+
+#include "bus-internal.h"
+#include "bus-match.h"
+#include "bus-message.h"
+#include "bus-util.h"
+#include "synthesize.h"
+#include "util.h"
+
+int synthetic_driver_send(sd_bus *b, sd_bus_message *m) {
+ int r;
+
+ assert(b);
+ assert(m);
+
+ r = bus_message_append_sender(m, "org.freedesktop.DBus");
+ if (r < 0)
+ return r;
+
+ r = bus_seal_synthetic_message(b, m);
+ if (r < 0)
+ return r;
+
+ return sd_bus_send(b, m, NULL);
+}
+
+int synthetic_reply_method_error(sd_bus_message *call, const sd_bus_error *e) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
+ int r;
+
+ assert(call);
+
+ if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
+ return 0;
+
+ r = sd_bus_message_new_method_error(call, &m, e);
+ if (r < 0)
+ return r;
+
+ return synthetic_driver_send(call->bus, m);
+}
+
+int synthetic_reply_method_errorf(sd_bus_message *call, const char *name, const char *format, ...) {
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ va_list ap;
+
+ va_start(ap, format);
+ bus_error_setfv(&error, name, format, ap);
+ va_end(ap);
+
+ return synthetic_reply_method_error(call, &error);
+}
+
+int synthetic_reply_method_errno(sd_bus_message *call, int error, const sd_bus_error *p) {
+ _cleanup_(sd_bus_error_free) sd_bus_error berror = SD_BUS_ERROR_NULL;
+
+ assert(call);
+
+ if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
+ return 0;
+
+ if (sd_bus_error_is_set(p))
+ return synthetic_reply_method_error(call, p);
+
+ sd_bus_error_set_errno(&berror, error);
+
+ return synthetic_reply_method_error(call, &berror);
+}
+
+int synthetic_reply_method_errnof(sd_bus_message *call, int error, const char *format, ...) {
+ _cleanup_(sd_bus_error_free) sd_bus_error berror = SD_BUS_ERROR_NULL;
+ va_list ap;
+
+ assert(call);
+
+ if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
+ return 0;
+
+ va_start(ap, format);
+ sd_bus_error_set_errnofv(&berror, error, format, ap);
+ va_end(ap);
+
+ return synthetic_reply_method_error(call, &berror);
+}
+
+int synthetic_reply_method_return(sd_bus_message *call, const char *types, ...) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
+ int r;
+
+ assert(call);
+
+ if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
+ return 0;
+
+ r = sd_bus_message_new_method_return(call, &m);
+ if (r < 0)
+ return r;
+
+ if (!isempty(types)) {
+ va_list ap;
+
+ va_start(ap, types);
+ r = bus_message_append_ap(m, types, ap);
+ va_end(ap);
+ if (r < 0)
+ return r;
+ }
+
+ return synthetic_driver_send(call->bus, m);
+}
+
+int synthetic_reply_method_return_strv(sd_bus_message *call, char **l) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
+ int r;
+
+ assert(call);
+
+ if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
+ return 0;
+
+ r = sd_bus_message_new_method_return(call, &m);
+ if (r < 0)
+ return synthetic_reply_method_errno(call, r, NULL);
+
+ r = sd_bus_message_append_strv(m, l);
+ if (r < 0)
+ return synthetic_reply_method_errno(call, r, NULL);
+
+ return synthetic_driver_send(call->bus, m);
+}
+
+int synthesize_name_acquired(Proxy *p, sd_bus *a, sd_bus *b, sd_bus_message *m) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *n = NULL;
+ const char *name, *old_owner, *new_owner;
+ int r;
+
+ assert(p);
+ assert(a);
+ assert(b);
+ assert(m);
+
+ /* If we get NameOwnerChanged for our own name, we need to
+ * synthesize NameLost/NameAcquired, since socket clients need
+ * that, even though it is obsoleted on kdbus */
+
+ if (!a->is_kernel)
+ return 0;
+
+ if (!sd_bus_message_is_signal(m, "org.freedesktop.DBus", "NameOwnerChanged") ||
+ !streq_ptr(m->path, "/org/freedesktop/DBus") ||
+ !streq_ptr(m->sender, "org.freedesktop.DBus"))
+ return 0;
+
+ r = sd_bus_message_read(m, "sss", &name, &old_owner, &new_owner);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_rewind(m, true);
+ if (r < 0)
+ return r;
+
+ if (streq(old_owner, a->unique_name)) {
+
+ r = sd_bus_message_new_signal(
+ b,
+ &n,
+ "/org/freedesktop/DBus",
+ "org.freedesktop.DBus",
+ "NameLost");
+
+ } else if (streq(new_owner, a->unique_name)) {
+
+ r = sd_bus_message_new_signal(
+ b,
+ &n,
+ "/org/freedesktop/DBus",
+ "org.freedesktop.DBus",
+ "NameAcquired");
+ } else
+ return 0;
+
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(n, "s", name);
+ if (r < 0)
+ return r;
+
+ r = bus_message_append_sender(n, "org.freedesktop.DBus");
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_set_destination(n, a->unique_name);
+ if (r < 0)
+ return r;
+
+ r = bus_seal_synthetic_message(b, n);
+ if (r < 0)
+ return r;
+
+ return sd_bus_send(b, n, NULL);
+}
diff --git a/src/libbus-proxy-core/synthesize.h b/src/libbus-proxy-core/synthesize.h
new file mode 100644
index 0000000000..cb8c21cdb7
--- /dev/null
+++ b/src/libbus-proxy-core/synthesize.h
@@ -0,0 +1,36 @@
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2014 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 <systemd/sd-bus.h>
+
+#include "proxy.h"
+
+int synthetic_driver_send(sd_bus *b, sd_bus_message *m);
+
+int synthetic_reply_method_return(sd_bus_message *call, const char *types, ...);
+int synthetic_reply_method_return_strv(sd_bus_message *call, char **l);
+
+int synthetic_reply_method_error(sd_bus_message *call, const sd_bus_error *e);
+int synthetic_reply_method_errorf(sd_bus_message *call, const char *name, const char *format, ...) _sd_printf_(3, 4);
+int synthetic_reply_method_errno(sd_bus_message *call, int error, const sd_bus_error *p);
+int synthetic_reply_method_errnof(sd_bus_message *call, int error, const char *format, ...) _sd_printf_(3, 4);
+
+int synthesize_name_acquired(Proxy *p, sd_bus *a, sd_bus *b, sd_bus_message *m);
diff --git a/src/libbus-proxy-core/test-bus-xml-policy.c b/src/libbus-proxy-core/test-bus-xml-policy.c
new file mode 100644
index 0000000000..6f32c09789
--- /dev/null
+++ b/src/libbus-proxy-core/test-bus-xml-policy.c
@@ -0,0 +1,170 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2014 Daniel Mack
+
+ 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 <errno.h>
+#include <stddef.h>
+#include <unistd.h>
+
+#include <systemd/sd-bus.h>
+
+#include "alloc-util.h"
+#include "bus-xml-policy.h"
+#include "log.h"
+#include "string-util.h"
+#include "strv.h"
+#include "util.h"
+
+static int test_policy_load(Policy *p, const char *name) {
+ _cleanup_free_ char *path = NULL;
+ int r = 0;
+
+ path = strjoin(TEST_DIR, "/bus-policy/", name, NULL);
+ assert_se(path);
+
+ if (access(path, R_OK) == 0)
+ r = policy_load(p, STRV_MAKE(path));
+ else
+ r = -ENOENT;
+
+ return r;
+}
+
+static int show_policy(const char *fn) {
+ Policy p = {};
+ int r;
+
+ r = policy_load(&p, STRV_MAKE(fn));
+ if (r < 0) {
+ log_error_errno(r, "Failed to load policy %s: %m", fn);
+ return r;
+ }
+
+ policy_dump(&p);
+ policy_free(&p);
+
+ return 0;
+}
+
+int main(int argc, char *argv[]) {
+
+ Policy p = {};
+
+ printf("Showing session policy BEGIN\n");
+ show_policy("/etc/dbus-1/session.conf");
+ printf("Showing session policy END\n");
+
+ printf("Showing system policy BEGIN\n");
+ show_policy("/etc/dbus-1/system.conf");
+ printf("Showing system policy END\n");
+
+ /* Ownership tests */
+ assert_se(test_policy_load(&p, "ownerships.conf") == 0);
+
+ assert_se(policy_check_own(&p, 0, 0, "org.test.test1") == true);
+ assert_se(policy_check_own(&p, 1, 0, "org.test.test1") == true);
+
+ assert_se(policy_check_own(&p, 0, 0, "org.test.test2") == true);
+ assert_se(policy_check_own(&p, 1, 0, "org.test.test2") == false);
+
+ assert_se(policy_check_own(&p, 0, 0, "org.test.test3") == false);
+ assert_se(policy_check_own(&p, 1, 0, "org.test.test3") == false);
+
+ assert_se(policy_check_own(&p, 0, 0, "org.test.test4") == false);
+ assert_se(policy_check_own(&p, 1, 0, "org.test.test4") == true);
+
+ policy_free(&p);
+
+ /* Signaltest */
+ assert_se(test_policy_load(&p, "signals.conf") == 0);
+
+ assert_se(policy_check_one_send(&p, 0, 0, SD_BUS_MESSAGE_SIGNAL, "bli.bla.blubb", NULL, "/an/object/path", NULL) == true);
+ assert_se(policy_check_one_send(&p, 1, 0, SD_BUS_MESSAGE_SIGNAL, "bli.bla.blubb", NULL, "/an/object/path", NULL) == false);
+
+ policy_free(&p);
+
+ /* Method calls */
+ assert_se(test_policy_load(&p, "methods.conf") == 0);
+ policy_dump(&p);
+
+ assert_se(policy_check_one_send(&p, 0, 0, SD_BUS_MESSAGE_METHOD_CALL, "org.test.test1", "/an/object/path", "bli.bla.blubb", "Member") == false);
+ assert_se(policy_check_one_send(&p, 0, 0, SD_BUS_MESSAGE_METHOD_CALL, "org.test.test1", "/an/object/path", "bli.bla.blubb", "Member") == false);
+ assert_se(policy_check_one_send(&p, 0, 0, SD_BUS_MESSAGE_METHOD_CALL, "org.test.test1", "/an/object/path", "org.test.int1", "Member") == true);
+ assert_se(policy_check_one_send(&p, 0, 0, SD_BUS_MESSAGE_METHOD_CALL, "org.test.test1", "/an/object/path", "org.test.int2", "Member") == true);
+
+ assert_se(policy_check_one_recv(&p, 0, 0, SD_BUS_MESSAGE_METHOD_CALL, "org.test.test3", "/an/object/path", "org.test.int3", "Member111") == true);
+
+ policy_free(&p);
+
+ /* User and groups */
+ assert_se(test_policy_load(&p, "hello.conf") == 0);
+ policy_dump(&p);
+
+ assert_se(policy_check_hello(&p, 0, 0) == true);
+ assert_se(policy_check_hello(&p, 1, 0) == false);
+ assert_se(policy_check_hello(&p, 0, 1) == false);
+
+ policy_free(&p);
+
+ /* dbus1 test file: ownership */
+
+ assert_se(test_policy_load(&p, "check-own-rules.conf") >= 0);
+ policy_dump(&p);
+
+ assert_se(policy_check_own(&p, 0, 0, "org.freedesktop") == false);
+ assert_se(policy_check_own(&p, 0, 0, "org.freedesktop.ManySystem") == false);
+ assert_se(policy_check_own(&p, 0, 0, "org.freedesktop.ManySystems") == true);
+ assert_se(policy_check_own(&p, 0, 0, "org.freedesktop.ManySystems.foo") == true);
+ assert_se(policy_check_own(&p, 0, 0, "org.freedesktop.ManySystems.foo.bar") == true);
+ assert_se(policy_check_own(&p, 0, 0, "org.freedesktop.ManySystems2") == false);
+ assert_se(policy_check_own(&p, 0, 0, "org.freedesktop.ManySystems2.foo") == false);
+ assert_se(policy_check_own(&p, 0, 0, "org.freedesktop.ManySystems2.foo.bar") == false);
+
+ policy_free(&p);
+
+ /* dbus1 test file: many rules */
+
+ assert_se(test_policy_load(&p, "many-rules.conf") >= 0);
+ policy_dump(&p);
+ policy_free(&p);
+
+ /* dbus1 test file: generic test */
+
+ assert_se(test_policy_load(&p, "test.conf") >= 0);
+ policy_dump(&p);
+
+ assert_se(policy_check_own(&p, 0, 0, "org.foo.FooService") == true);
+ assert_se(policy_check_own(&p, 0, 0, "org.foo.FooService2") == false);
+ assert_se(policy_check_one_send(&p, 0, 0, SD_BUS_MESSAGE_METHOD_CALL, "org.test.test1", "/an/object/path", "org.test.int2", "Member") == false);
+ assert_se(policy_check_one_send(&p, 0, 0, SD_BUS_MESSAGE_METHOD_CALL, "org.test.test1", "/an/object/path", "org.foo.FooBroadcastInterface", "Member") == true);
+ assert_se(policy_check_one_recv(&p, 0, 0, SD_BUS_MESSAGE_METHOD_CALL, "org.foo.FooService", "/an/object/path", "org.foo.FooBroadcastInterface", "Member") == true);
+ assert_se(policy_check_one_recv(&p, 0, 0, SD_BUS_MESSAGE_METHOD_CALL, "org.foo.FooService", "/an/object/path", "org.foo.FooBroadcastInterface2", "Member") == false);
+ assert_se(policy_check_one_recv(&p, 0, 0, SD_BUS_MESSAGE_METHOD_CALL, "org.foo.FooService2", "/an/object/path", "org.foo.FooBroadcastInterface", "Member") == false);
+
+ assert_se(policy_check_own(&p, 100, 0, "org.foo.FooService") == false);
+ assert_se(policy_check_own(&p, 100, 0, "org.foo.FooService2") == false);
+ assert_se(policy_check_one_send(&p, 100, 0, SD_BUS_MESSAGE_METHOD_CALL, "org.test.test1", "/an/object/path", "org.test.int2", "Member") == false);
+ assert_se(policy_check_one_send(&p, 100, 0, SD_BUS_MESSAGE_METHOD_CALL, "org.test.test1", "/an/object/path", "org.foo.FooBroadcastInterface", "Member") == false);
+ assert_se(policy_check_one_recv(&p, 100, 0, SD_BUS_MESSAGE_METHOD_CALL, "org.foo.FooService", "/an/object/path", "org.foo.FooBroadcastInterface", "Member") == true);
+ assert_se(policy_check_one_recv(&p, 100, 0, SD_BUS_MESSAGE_METHOD_CALL, "org.foo.FooService", "/an/object/path", "org.foo.FooBroadcastInterface2", "Member") == false);
+ assert_se(policy_check_one_recv(&p, 100, 0, SD_BUS_MESSAGE_METHOD_CALL, "org.foo.FooService2", "/an/object/path", "org.foo.FooBroadcastInterface", "Member") == false);
+
+ policy_free(&p);
+
+ return EXIT_SUCCESS;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-09-16 16:59:40 +0000