diff options
| author |   José Bollo <jose.bollo@iot.bzh> | 2020-02-04 18:02:26 +0100 |
|---|---|---|
| committer |   Jan-Simon Moeller <jsmoeller@linuxfoundation.org> | 2020-02-17 15:51:09 +0000 |
| commit | ffe584b58889bad79004f3916f858299d8b7b385 (patch) | |
| tree | f51c326f0d7a859e9bab5a78e28bbb161adadfe7 /meta-security/recipes-core/dbus-cynagora | |
| parent | 8787f82ce32a5fe42c56513ce32e8d1d94ce3e3e (diff) | |
meta-security: activates dbus-cynagora
Change-Id: Ia82ef9c5693c5eb4ba147bb7ead54f2608cb5dd4
Signed-off-by: José Bollo <jose.bollo@iot.bzh>
Diffstat (limited to 'meta-security/recipes-core/dbus-cynagora')
8 files changed, 7228 insertions, 0 deletions
diff --git a/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0001-Integration-of-Cynara-asynchronous-security-checks.patch b/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0001-Integration-of-Cynara-asynchronous-security-checks.patch new file mode 100644 index 000000000..55cedb9c7 --- /dev/null +++ b/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0001-Integration-of-Cynara-asynchronous-security-checks.patch @@ -0,0 +1,2309 @@ +From ea4b650366261e4257e4b0fb95e7f48e30ef36f0 Mon Sep 17 00:00:00 2001 +From: Jacek Bukarewicz <j.bukarewicz@samsung.com> +Date: Thu, 27 Nov 2014 18:11:05 +0100 +Subject: [PATCH 1/8] Integration of Cynara asynchronous security checks +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +This commit introduces basic framework for asynchronous policy +checks and Cynara integration code. Functions for checking security +policy can now return third value - BUS_RESULT_LATER denoting check +result unavailability. Whenever policy checker cannot decide on the +result of the check it is supposed to allocate DeferredMessage structure +that will be passed to the upper layers which can decide what should be +done in such situation. +Proper handling of such case will be implemented in subsequent commits. +Currently such return value results in message denial. + +Cherry picked from 4dcfb02f17247ff9de966b62182cd2e08f301238 +by José Bollo. + +Updated for dbus 1.10.20 by Scott Murray and José Bollo +Updated for dbus 1.12.16 by José Bollo + +Change-Id: I9bcbce34577e5dc2a3cecf6233a0a2b0e43e1108 +Signed-off-by: José Bollo <jose.bollo@iot.bzh> +Signed-off-by: Scott Murray <scott.murray@konsulko.com> +--- + bus/Makefile.am | 6 + + bus/activation.c | 5 +- + bus/bus.c | 124 ++++-- + bus/bus.h | 22 +- + bus/check.c | 217 ++++++++++ + bus/check.h | 68 ++++ + bus/config-parser-common.c | 6 + + bus/config-parser-common.h | 1 + + bus/config-parser-trivial.c | 2 + + bus/config-parser.c | 72 +++- + bus/connection.c | 57 ++- + bus/connection.h | 4 + + bus/cynara.c | 374 ++++++++++++++++++ + bus/cynara.h | 37 ++ + bus/dispatch.c | 46 ++- + bus/driver.h | 2 + + bus/policy.c | 195 ++++++--- + bus/policy.h | 29 +- + configure.ac | 12 + + test/Makefile.am | 1 + + .../data/invalid-config-files/badcheck-1.conf | 9 + + .../data/invalid-config-files/badcheck-2.conf | 9 + + test/data/valid-config-files/check-1.conf | 9 + + .../debug-check-some.conf.in | 18 + + 24 files changed, 1181 insertions(+), 144 deletions(-) + create mode 100644 bus/check.c + create mode 100644 bus/check.h + create mode 100644 bus/cynara.c + create mode 100644 bus/cynara.h + create mode 100644 test/data/invalid-config-files/badcheck-1.conf + create mode 100644 test/data/invalid-config-files/badcheck-2.conf + create mode 100644 test/data/valid-config-files/check-1.conf + create mode 100644 test/data/valid-config-files/debug-check-some.conf.in + +diff --git a/bus/Makefile.am b/bus/Makefile.am +index c917063..2a8a72c 100644 +--- a/bus/Makefile.am ++++ b/bus/Makefile.am +@@ -13,6 +13,7 @@ DBUS_BUS_LIBS = \ + $(THREAD_LIBS) \ + $(ADT_LIBS) \ + $(NETWORK_libs) \ ++ $(CYNARA_LIBS) \ + $(NULL) + + DBUS_LAUNCHER_LIBS = \ +@@ -30,6 +31,7 @@ AM_CPPFLAGS = \ + $(APPARMOR_CFLAGS) \ + -DDBUS_SYSTEM_CONFIG_FILE=\""$(dbusdatadir)/system.conf"\" \ + -DDBUS_COMPILATION \ ++ $(CYNARA_CFLAGS) \ + $(NULL) + + # if assertions are enabled, improve backtraces +@@ -90,6 +92,8 @@ BUS_SOURCES= \ + audit.h \ + bus.c \ + bus.h \ ++ check.c \ ++ check.h \ + config-loader-expat.c \ + config-parser.c \ + config-parser.h \ +@@ -97,6 +101,8 @@ BUS_SOURCES= \ + config-parser-common.h \ + connection.c \ + connection.h \ ++ cynara.c \ ++ cynara.h \ + desktop-file.c \ + desktop-file.h \ + $(DIR_WATCH_SOURCE) \ +diff --git a/bus/activation.c b/bus/activation.c +index 99404b9..f9c6c62 100644 +--- a/bus/activation.c ++++ b/bus/activation.c +@@ -1789,14 +1789,15 @@ bus_activation_activate_service (BusActivation *activation, + + if (auto_activation && + entry != NULL && +- !bus_context_check_security_policy (activation->context, ++ BUS_RESULT_TRUE != bus_context_check_security_policy (activation->context, + transaction, + connection, /* sender */ + NULL, /* addressed recipient */ + NULL, /* proposed recipient */ + activation_message, + entry, +- error)) ++ error, ++ NULL)) + { + _DBUS_ASSERT_ERROR_IS_SET (error); + _dbus_verbose ("activation not authorized: %s: %s\n", +diff --git a/bus/bus.c b/bus/bus.c +index 2ad8e78..6fc45d0 100644 +--- a/bus/bus.c ++++ b/bus/bus.c +@@ -38,6 +38,7 @@ + #include "apparmor.h" + #include "audit.h" + #include "dir-watch.h" ++#include "check.h" + #include <dbus/dbus-auth.h> + #include <dbus/dbus-list.h> + #include <dbus/dbus-hash.h> +@@ -67,6 +68,7 @@ struct BusContext + BusRegistry *registry; + BusPolicy *policy; + BusMatchmaker *matchmaker; ++ BusCheck *check; + BusLimits limits; + DBusRLimit *initial_fd_limit; + unsigned int fork : 1; +@@ -1003,6 +1005,10 @@ bus_context_new (const DBusString *config_file, + parser = NULL; + } + ++ context->check = bus_check_new(context, error); ++ if (context->check == NULL) ++ goto failed; ++ + dbus_server_free_data_slot (&server_data_slot); + + return context; +@@ -1127,6 +1133,12 @@ bus_context_unref (BusContext *context) + + bus_context_shutdown (context); + ++ if (context->check) ++ { ++ bus_check_unref(context->check); ++ context->check = NULL; ++ } ++ + if (context->connections) + { + bus_connections_unref (context->connections); +@@ -1256,6 +1268,12 @@ bus_context_get_loop (BusContext *context) + return context->loop; + } + ++BusCheck* ++bus_context_get_check (BusContext *context) ++{ ++ return context->check; ++} ++ + dbus_bool_t + bus_context_allow_unix_user (BusContext *context, + unsigned long uid) +@@ -1451,6 +1469,7 @@ complain_about_message (BusContext *context, + DBusConnection *proposed_recipient, + dbus_bool_t requested_reply, + dbus_bool_t log, ++ const char *privilege, + DBusError *error) + { + DBusError stack_error = DBUS_ERROR_INIT; +@@ -1480,7 +1499,8 @@ complain_about_message (BusContext *context, + dbus_set_error (&stack_error, error_name, + "%s, %d matched rules; type=\"%s\", sender=\"%s\" (%s) " + "interface=\"%s\" member=\"%s\" error name=\"%s\" " +- "requested_reply=\"%d\" destination=\"%s\" (%s)", ++ "requested_reply=\"%d\" destination=\"%s\" (%s) " ++ "privilege=\"%s\"", + complaint, + matched_rules, + dbus_message_type_to_string (dbus_message_get_type (message)), +@@ -1491,7 +1511,8 @@ complain_about_message (BusContext *context, + nonnull (dbus_message_get_error_name (message), "(unset)"), + requested_reply, + nonnull (dbus_message_get_destination (message), DBUS_SERVICE_DBUS), +- proposed_recipient_loginfo); ++ proposed_recipient_loginfo, ++ nonnull (privilege, "(n/a)")); + + /* If we hit OOM while setting the error, this will syslog "out of memory" + * which is itself an indication that something is seriously wrong */ +@@ -1519,7 +1540,7 @@ complain_about_message (BusContext *context, + * NULL for addressed_recipient may mean the bus driver, or may mean + * no destination was specified in the message (e.g. a signal). + */ +-dbus_bool_t ++BusResult + bus_context_check_security_policy (BusContext *context, + BusTransaction *transaction, + DBusConnection *sender, +@@ -1527,7 +1548,8 @@ bus_context_check_security_policy (BusContext *context, + DBusConnection *proposed_recipient, + DBusMessage *message, + BusActivationEntry *activation_entry, +- DBusError *error) ++ DBusError *error, ++ BusDeferredMessage **deferred_message) + { + const char *src, *dest; + BusClientPolicy *sender_policy; +@@ -1536,6 +1558,7 @@ bus_context_check_security_policy (BusContext *context, + dbus_bool_t log; + int type; + dbus_bool_t requested_reply; ++ const char *privilege; + + type = dbus_message_get_type (message); + src = dbus_message_get_sender (message); +@@ -1565,7 +1588,7 @@ bus_context_check_security_policy (BusContext *context, + dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED, + "Message bus will not accept messages of unknown type\n"); + +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + requested_reply = FALSE; +@@ -1595,7 +1618,7 @@ bus_context_check_security_policy (BusContext *context, + if (dbus_error_is_set (&error2)) + { + dbus_move_error (&error2, error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + } + } +@@ -1624,11 +1647,11 @@ bus_context_check_security_policy (BusContext *context, + complain_about_message (context, DBUS_ERROR_ACCESS_DENIED, + "An SELinux policy prevents this sender from sending this " + "message to this recipient", +- 0, message, sender, proposed_recipient, FALSE, FALSE, error); ++ 0, message, sender, proposed_recipient, FALSE, FALSE, NULL, error); + _dbus_verbose ("SELinux security check denying send to service\n"); + } + +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + /* next verify AppArmor access controls. If allowed then +@@ -1646,7 +1669,7 @@ bus_context_check_security_policy (BusContext *context, + src ? src : DBUS_SERVICE_DBUS, + activation_entry, + error)) +- return FALSE; ++ return BUS_RESULT_FALSE; + + if (!bus_connection_is_active (sender)) + { +@@ -1660,7 +1683,7 @@ bus_context_check_security_policy (BusContext *context, + { + _dbus_verbose ("security check allowing %s message\n", + "Hello"); +- return TRUE; ++ return BUS_RESULT_TRUE; + } + else + { +@@ -1671,7 +1694,7 @@ bus_context_check_security_policy (BusContext *context, + "Client tried to send a message other than %s without being registered", + "Hello"); + +- return FALSE; ++ return BUS_RESULT_FALSE; + } + } + } +@@ -1720,20 +1743,29 @@ bus_context_check_security_policy (BusContext *context, + (proposed_recipient == NULL && recipient_policy == NULL)); + + log = FALSE; +- if (sender_policy && +- !bus_client_policy_check_can_send (sender_policy, +- context->registry, +- requested_reply, +- proposed_recipient, +- message, &toggles, &log)) +- { +- complain_about_message (context, DBUS_ERROR_ACCESS_DENIED, +- "Rejected send message", toggles, +- message, sender, proposed_recipient, requested_reply, +- (addressed_recipient == proposed_recipient), error); +- _dbus_verbose ("security policy disallowing message due to sender policy\n"); +- return FALSE; +- } ++ if (sender_policy) ++ { ++ BusResult res = bus_client_policy_check_can_send (sender, ++ sender_policy, ++ context->registry, ++ requested_reply, ++ addressed_recipient, ++ proposed_recipient, ++ message, &toggles, &log, &privilege, ++ deferred_message); ++ if (res == BUS_RESULT_FALSE) ++ { ++ complain_about_message (context, DBUS_ERROR_ACCESS_DENIED, ++ "Rejected send message", toggles, ++ message, sender, proposed_recipient, requested_reply, ++ (addressed_recipient == proposed_recipient), privilege, ++ error); ++ _dbus_verbose ("security policy disallowing message due to sender policy\n"); ++ return BUS_RESULT_FALSE; ++ } ++ else if (res == BUS_RESULT_LATER) ++ return BUS_RESULT_LATER; ++ } + + if (log) + { +@@ -1742,23 +1774,29 @@ bus_context_check_security_policy (BusContext *context, + complain_about_message (context, DBUS_ERROR_ACCESS_DENIED, + "Would reject message", toggles, + message, sender, proposed_recipient, requested_reply, +- TRUE, NULL); ++ TRUE, privilege, NULL); + } + +- if (recipient_policy && +- !bus_client_policy_check_can_receive (recipient_policy, +- context->registry, +- requested_reply, +- sender, +- addressed_recipient, proposed_recipient, +- message, &toggles)) ++ if (recipient_policy) + { +- complain_about_message (context, DBUS_ERROR_ACCESS_DENIED, +- "Rejected receive message", toggles, +- message, sender, proposed_recipient, requested_reply, +- (addressed_recipient == proposed_recipient), error); +- _dbus_verbose ("security policy disallowing message due to recipient policy\n"); +- return FALSE; ++ BusResult res; ++ res = bus_client_policy_check_can_receive (recipient_policy, ++ context->registry, ++ requested_reply, ++ sender, ++ addressed_recipient, proposed_recipient, ++ message, &toggles, &privilege, deferred_message); ++ if (res == BUS_RESULT_FALSE) ++ { ++ complain_about_message(context, DBUS_ERROR_ACCESS_DENIED, "Rejected receive message", ++ toggles, message, sender, proposed_recipient, requested_reply, ++ (addressed_recipient == proposed_recipient), privilege, error); ++ _dbus_verbose( ++ "security policy disallowing message due to recipient policy\n"); ++ return BUS_RESULT_FALSE; ++ } ++ else if (res == BUS_RESULT_LATER) ++ return BUS_RESULT_LATER; + } + + /* See if limits on size have been exceeded */ +@@ -1768,10 +1806,10 @@ bus_context_check_security_policy (BusContext *context, + { + complain_about_message (context, DBUS_ERROR_LIMITS_EXCEEDED, + "Rejected: destination has a full message queue", +- 0, message, sender, proposed_recipient, requested_reply, TRUE, ++ 0, message, sender, proposed_recipient, requested_reply, TRUE, NULL, + error); + _dbus_verbose ("security policy disallowing message due to full message queue\n"); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + /* Record that we will allow a reply here in the future (don't +@@ -1792,11 +1830,11 @@ bus_context_check_security_policy (BusContext *context, + message, error)) + { + _dbus_verbose ("Failed to record reply expectation or problem with the message expecting a reply\n"); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + _dbus_verbose ("security policy allowing message\n"); +- return TRUE; ++ return BUS_RESULT_TRUE; + } + + void +diff --git a/bus/bus.h b/bus/bus.h +index 2e0de82..82c32c8 100644 +--- a/bus/bus.h ++++ b/bus/bus.h +@@ -45,6 +45,22 @@ typedef struct BusTransaction BusTransaction; + typedef struct BusMatchmaker BusMatchmaker; + typedef struct BusMatchRule BusMatchRule; + typedef struct BusActivationEntry BusActivationEntry; ++typedef struct BusCheck BusCheck; ++typedef struct BusDeferredMessage BusDeferredMessage; ++typedef struct BusCynara BusCynara; ++ ++/** ++ * BusResult is defined as a pointer to a dummy structure to allow detection of type mismatches. ++ * The disadvantage of such solution is that now BusResult variables cannot be used in switch ++ * statement. ++ * Additionally, BUS_RESULT_TRUE is defined as 0 instead of 1 to help detect type mismatches ++ * at runtime. ++ */ ++typedef const struct BusResultStruct { int dummy; } *BusResult; ++ ++static const BusResult BUS_RESULT_TRUE = (BusResult)0x0; ++static const BusResult BUS_RESULT_FALSE = (BusResult)0x1; ++static const BusResult BUS_RESULT_LATER = (BusResult)0x2; + + typedef struct + { +@@ -101,6 +117,7 @@ BusConnections* bus_context_get_connections (BusContext + BusActivation* bus_context_get_activation (BusContext *context); + BusMatchmaker* bus_context_get_matchmaker (BusContext *context); + DBusLoop* bus_context_get_loop (BusContext *context); ++BusCheck * bus_context_get_check (BusContext *context); + dbus_bool_t bus_context_allow_unix_user (BusContext *context, + unsigned long uid); + dbus_bool_t bus_context_allow_windows_user (BusContext *context, +@@ -136,14 +153,15 @@ void bus_context_log_and_set_error (BusContext + const char *name, + const char *msg, + ...) _DBUS_GNUC_PRINTF (5, 6); +-dbus_bool_t bus_context_check_security_policy (BusContext *context, ++BusResult bus_context_check_security_policy (BusContext *context, + BusTransaction *transaction, + DBusConnection *sender, + DBusConnection *addressed_recipient, + DBusConnection *proposed_recipient, + DBusMessage *message, + BusActivationEntry *activation_entry, +- DBusError *error); ++ DBusError *error, ++ BusDeferredMessage **deferred_message); + void bus_context_check_all_watches (BusContext *context); + + #endif /* BUS_BUS_H */ +diff --git a/bus/check.c b/bus/check.c +new file mode 100644 +index 0000000..5b72d31 +--- /dev/null ++++ b/bus/check.c +@@ -0,0 +1,217 @@ ++/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ ++/* check.c Bus security policy runtime check ++ * ++ * Copyright (C) 2014 Intel, Inc. ++ * Copyright (c) 2014 Samsung Electronics, Ltd. ++ * ++ * Licensed under the Academic Free License version 2.1 ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ * ++ * This program 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 General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA ++ * ++ */ ++ ++#include <config.h> ++#include "check.h" ++#include "connection.h" ++#include "dispatch.h" ++#include "cynara.h" ++#include "utils.h" ++#include <dbus/dbus-connection-internal.h> ++#include <dbus/dbus-message-internal.h> ++#include <dbus/dbus-internals.h> ++ ++ ++typedef struct BusCheck ++{ ++ int refcount; ++ ++ BusContext *context; ++ BusCynara *cynara; ++} BusCheck; ++ ++typedef struct BusDeferredMessage ++{ ++ int refcount; ++ ++ DBusMessage *message; ++ DBusConnection *sender; ++ DBusConnection *proposed_recipient; ++ DBusConnection *addressed_recipient; ++ dbus_bool_t full_dispatch; ++ BusDeferredMessageStatus status; ++ BusResult response; ++ BusCheckResponseFunc response_callback; ++} BusDeferredMessage; ++ ++BusCheck * ++bus_check_new (BusContext *context, DBusError *error) ++{ ++ BusCheck *check; ++ ++ check = dbus_new(BusCheck, 1); ++ if (check == NULL) ++ { ++ BUS_SET_OOM(error); ++ return NULL; ++ } ++ ++ check->refcount = 1; ++ check->context = context; ++ check->cynara = bus_cynara_new(check, error); ++ if (dbus_error_is_set(error)) ++ { ++ dbus_free(check); ++ return NULL; ++ } ++ ++ return check; ++} ++ ++BusCheck * ++bus_check_ref (BusCheck *check) ++{ ++ _dbus_assert (check->refcount > 0); ++ check->refcount += 1; ++ ++ return check; ++} ++ ++void ++bus_check_unref (BusCheck *check) ++{ ++ _dbus_assert (check->refcount > 0); ++ ++ check->refcount -= 1; ++ ++ if (check->refcount == 0) ++ { ++ bus_cynara_unref(check->cynara); ++ dbus_free(check); ++ } ++} ++ ++BusContext * ++bus_check_get_context (BusCheck *check) ++{ ++ return check->context; ++} ++ ++BusCynara * ++bus_check_get_cynara (BusCheck *check) ++{ ++ return check->cynara; ++} ++ ++BusResult ++bus_check_privilege (BusCheck *check, ++ DBusMessage *message, ++ DBusConnection *sender, ++ DBusConnection *addressed_recipient, ++ DBusConnection *proposed_recipient, ++ const char *privilege, ++ BusDeferredMessageStatus check_type, ++ BusDeferredMessage **deferred_message) ++{ ++ BusResult result = BUS_RESULT_FALSE; ++#ifdef DBUS_ENABLE_CYNARA ++ BusCynara *cynara; ++#endif ++ DBusConnection *connection; ++ ++ connection = check_type == BUS_DEFERRED_MESSAGE_CHECK_RECEIVE ? proposed_recipient : sender; ++ ++ if (!dbus_connection_get_is_connected(connection)) ++ { ++ return BUS_RESULT_FALSE; ++ } ++ ++ /* ask policy checkers */ ++#ifdef DBUS_ENABLE_CYNARA ++ cynara = bus_check_get_cynara(check); ++ result = bus_cynara_check_privilege(cynara, message, sender, addressed_recipient, ++ proposed_recipient, privilege, check_type, deferred_message); ++#endif ++ ++ if (result == BUS_RESULT_LATER && deferred_message != NULL) ++ { ++ (*deferred_message)->status |= check_type; ++ } ++ return result; ++} ++ ++BusDeferredMessage *bus_deferred_message_new (DBusMessage *message, ++ DBusConnection *sender, ++ DBusConnection *addressed_recipient, ++ DBusConnection *proposed_recipient, ++ BusResult response) ++{ ++ BusDeferredMessage *deferred_message; ++ ++ deferred_message = dbus_new(BusDeferredMessage, 1); ++ if (deferred_message == NULL) ++ { ++ return NULL; ++ } ++ ++ deferred_message->refcount = 1; ++ deferred_message->sender = sender != NULL ? dbus_connection_ref(sender) : NULL; ++ deferred_message->addressed_recipient = addressed_recipient != NULL ? dbus_connection_ref(addressed_recipient) : NULL; ++ deferred_message->proposed_recipient = proposed_recipient != NULL ? dbus_connection_ref(proposed_recipient) : NULL; ++ deferred_message->message = dbus_message_ref(message); ++ deferred_message->response = response; ++ deferred_message->status = 0; ++ deferred_message->full_dispatch = FALSE; ++ deferred_message->response_callback = NULL; ++ ++ return deferred_message; ++} ++ ++BusDeferredMessage * ++bus_deferred_message_ref (BusDeferredMessage *deferred_message) ++{ ++ _dbus_assert (deferred_message->refcount > 0); ++ deferred_message->refcount += 1; ++ return deferred_message; ++} ++ ++void ++bus_deferred_message_unref (BusDeferredMessage *deferred_message) ++{ ++ _dbus_assert (deferred_message->refcount > 0); ++ ++ deferred_message->refcount -= 1; ++ ++ if (deferred_message->refcount == 0) ++ { ++ dbus_message_unref(deferred_message->message); ++ if (deferred_message->sender != NULL) ++ dbus_connection_unref(deferred_message->sender); ++ if (deferred_message->addressed_recipient != NULL) ++ dbus_connection_unref(deferred_message->addressed_recipient); ++ if (deferred_message->proposed_recipient != NULL) ++ dbus_connection_unref(deferred_message->proposed_recipient); ++ dbus_free(deferred_message); ++ } ++} ++ ++void ++bus_deferred_message_response_received (BusDeferredMessage *deferred_message, ++ BusResult result) ++{ ++ if (deferred_message->response_callback != NULL) ++ { ++ deferred_message->response_callback(deferred_message, result); ++ } ++} +diff --git a/bus/check.h b/bus/check.h +new file mode 100644 +index 0000000..c3fcaf9 +--- /dev/null ++++ b/bus/check.h +@@ -0,0 +1,68 @@ ++/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ ++/* check.h Bus security policy runtime check ++ * ++ * Copyright (C) 2014 Intel, Inc. ++ * Copyright (c) 2014 Samsung Electronics, Ltd. ++ * ++ * Licensed under the Academic Free License version 2.1 ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ * ++ * This program 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 General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA ++ * ++ */ ++ ++#ifndef BUS_CHECK_H ++#define BUS_CHECK_H ++ ++#include "bus.h" ++#include "policy.h" ++ ++ ++typedef void (*BusCheckResponseFunc) (BusDeferredMessage *message, ++ BusResult result); ++ ++typedef enum { ++ BUS_DEFERRED_MESSAGE_CHECK_SEND = 1 << 0, ++ BUS_DEFERRED_MESSAGE_CHECK_RECEIVE = 1 << 1, ++ BUS_DEFERRED_MESSAGE_CHECK_OWN = 1 << 2, ++} BusDeferredMessageStatus; ++ ++ ++BusCheck *bus_check_new (BusContext *context, ++ DBusError *error); ++BusCheck *bus_check_ref (BusCheck *check); ++void bus_check_unref (BusCheck *check); ++ ++BusContext *bus_check_get_context (BusCheck *check); ++BusCynara *bus_check_get_cynara (BusCheck *check); ++BusResult bus_check_privilege (BusCheck *check, ++ DBusMessage *message, ++ DBusConnection *sender, ++ DBusConnection *addressed_recipient, ++ DBusConnection *proposed_recipient, ++ const char *privilege, ++ BusDeferredMessageStatus check_type, ++ BusDeferredMessage **deferred_message); ++ ++BusDeferredMessage *bus_deferred_message_new (DBusMessage *message, ++ DBusConnection *sender, ++ DBusConnection *addressed_recipient, ++ DBusConnection *proposed_recipient, ++ BusResult response); ++ ++BusDeferredMessage *bus_deferred_message_ref (BusDeferredMessage *deferred_message); ++void bus_deferred_message_unref (BusDeferredMessage *deferred_message); ++void bus_deferred_message_response_received (BusDeferredMessage *deferred_message, ++ BusResult result); ++#endif /* BUS_CHECK_H */ +diff --git a/bus/config-parser-common.c b/bus/config-parser-common.c +index c1c4191..e2f253d 100644 +--- a/bus/config-parser-common.c ++++ b/bus/config-parser-common.c +@@ -75,6 +75,10 @@ bus_config_parser_element_name_to_type (const char *name) + { + return ELEMENT_DENY; + } ++ else if (strcmp (name, "check") == 0) ++ { ++ return ELEMENT_CHECK; ++ } + else if (strcmp (name, "servicehelper") == 0) + { + return ELEMENT_SERVICEHELPER; +@@ -159,6 +163,8 @@ bus_config_parser_element_type_to_name (ElementType type) + return "allow"; + case ELEMENT_DENY: + return "deny"; ++ case ELEMENT_CHECK: ++ return "check"; + case ELEMENT_FORK: + return "fork"; + case ELEMENT_PIDFILE: +diff --git a/bus/config-parser-common.h b/bus/config-parser-common.h +index 382a014..9e026d1 100644 +--- a/bus/config-parser-common.h ++++ b/bus/config-parser-common.h +@@ -36,6 +36,7 @@ typedef enum + ELEMENT_LIMIT, + ELEMENT_ALLOW, + ELEMENT_DENY, ++ ELEMENT_CHECK, + ELEMENT_FORK, + ELEMENT_PIDFILE, + ELEMENT_SERVICEDIR, +diff --git a/bus/config-parser-trivial.c b/bus/config-parser-trivial.c +index dd65c6d..23dedb4 100644 +--- a/bus/config-parser-trivial.c ++++ b/bus/config-parser-trivial.c +@@ -194,6 +194,7 @@ bus_config_parser_start_element (BusConfigParser *parser, + case ELEMENT_POLICY: + case ELEMENT_LIMIT: + case ELEMENT_ALLOW: ++ case ELEMENT_CHECK: + case ELEMENT_DENY: + case ELEMENT_FORK: + case ELEMENT_PIDFILE: +@@ -316,6 +317,7 @@ bus_config_parser_content (BusConfigParser *parser, + case ELEMENT_POLICY: + case ELEMENT_LIMIT: + case ELEMENT_ALLOW: ++ case ELEMENT_CHECK: + case ELEMENT_DENY: + case ELEMENT_FORK: + case ELEMENT_PIDFILE: +diff --git a/bus/config-parser.c b/bus/config-parser.c +index be27d38..7f91469 100644 +--- a/bus/config-parser.c ++++ b/bus/config-parser.c +@@ -1318,7 +1318,7 @@ append_rule_from_element (BusConfigParser *parser, + const char *element_name, + const char **attribute_names, + const char **attribute_values, +- dbus_bool_t allow, ++ BusPolicyRuleAccess access, + DBusError *error) + { + const char *log; +@@ -1360,6 +1360,7 @@ append_rule_from_element (BusConfigParser *parser, + const char *own_prefix; + const char *user; + const char *group; ++ const char *privilege; + + BusPolicyRule *rule; + +@@ -1390,6 +1391,7 @@ append_rule_from_element (BusConfigParser *parser, + "user", &user, + "group", &group, + "log", &log, ++ "privilege", &privilege, + NULL)) + return FALSE; + +@@ -1422,6 +1424,7 @@ append_rule_from_element (BusConfigParser *parser, + + if (!(any_send_attribute || + any_receive_attribute || ++ privilege || + own || own_prefix || user || group)) + { + dbus_set_error (error, DBUS_ERROR_FAILED, +@@ -1438,7 +1441,30 @@ append_rule_from_element (BusConfigParser *parser, + element_name); + return FALSE; + } +- ++ ++ if (access == BUS_POLICY_RULE_ACCESS_CHECK) ++ { ++ if (privilege == NULL || !*privilege) ++ { ++ dbus_set_error (error, DBUS_ERROR_FAILED, ++ "On element <%s>, you must specify the privilege to be checked.", ++ element_name); ++ return FALSE; ++ } ++ } ++ else ++ { ++ if (privilege != NULL && *privilege) ++ { ++ dbus_set_error (error, DBUS_ERROR_FAILED, ++ "On element <%s>, privilege %s is used outside of a check rule.", ++ element_name, privilege); ++ return FALSE; ++ } ++ else ++ privilege = NULL; /* replace (potentially) empty string with NULL pointer, it wouldn't be used anyway */ ++ } ++ + /* Allowed combinations of elements are: + * + * base, must be all send or all receive: +@@ -1589,7 +1615,7 @@ append_rule_from_element (BusConfigParser *parser, + error)) + return FALSE; + +- rule = bus_policy_rule_new (BUS_POLICY_RULE_SEND, allow); ++ rule = bus_policy_rule_new (BUS_POLICY_RULE_SEND, access); + if (rule == NULL) + goto nomem; + +@@ -1694,7 +1720,7 @@ append_rule_from_element (BusConfigParser *parser, + error)) + return FALSE; + +- rule = bus_policy_rule_new (BUS_POLICY_RULE_RECEIVE, allow); ++ rule = bus_policy_rule_new (BUS_POLICY_RULE_RECEIVE, access); + if (rule == NULL) + goto nomem; + +@@ -1726,7 +1752,7 @@ append_rule_from_element (BusConfigParser *parser, + } + else if (own || own_prefix) + { +- rule = bus_policy_rule_new (BUS_POLICY_RULE_OWN, allow); ++ rule = bus_policy_rule_new (BUS_POLICY_RULE_OWN, access); + if (rule == NULL) + goto nomem; + +@@ -1752,7 +1778,7 @@ append_rule_from_element (BusConfigParser *parser, + { + if (IS_WILDCARD (user)) + { +- rule = bus_policy_rule_new (BUS_POLICY_RULE_USER, allow); ++ rule = bus_policy_rule_new (BUS_POLICY_RULE_USER, access); + if (rule == NULL) + goto nomem; + +@@ -1767,7 +1793,7 @@ append_rule_from_element (BusConfigParser *parser, + + if (_dbus_parse_unix_user_from_config (&username, &uid)) + { +- rule = bus_policy_rule_new (BUS_POLICY_RULE_USER, allow); ++ rule = bus_policy_rule_new (BUS_POLICY_RULE_USER, access); + if (rule == NULL) + goto nomem; + +@@ -1784,7 +1810,7 @@ append_rule_from_element (BusConfigParser *parser, + { + if (IS_WILDCARD (group)) + { +- rule = bus_policy_rule_new (BUS_POLICY_RULE_GROUP, allow); ++ rule = bus_policy_rule_new (BUS_POLICY_RULE_GROUP, access); + if (rule == NULL) + goto nomem; + +@@ -1799,7 +1825,7 @@ append_rule_from_element (BusConfigParser *parser, + + if (_dbus_parse_unix_group_from_config (&groupname, &gid)) + { +- rule = bus_policy_rule_new (BUS_POLICY_RULE_GROUP, allow); ++ rule = bus_policy_rule_new (BUS_POLICY_RULE_GROUP, access); + if (rule == NULL) + goto nomem; + +@@ -1823,6 +1849,10 @@ append_rule_from_element (BusConfigParser *parser, + _dbus_assert (pe != NULL); + _dbus_assert (pe->type == ELEMENT_POLICY); + ++ rule->privilege = _dbus_strdup (privilege); ++ if (privilege && !rule->privilege) ++ goto nomem; ++ + switch (pe->d.policy.type) + { + case POLICY_IGNORED: +@@ -1898,7 +1928,7 @@ start_policy_child (BusConfigParser *parser, + { + if (!append_rule_from_element (parser, element_name, + attribute_names, attribute_values, +- TRUE, error)) ++ BUS_POLICY_RULE_ACCESS_ALLOW, error)) + return FALSE; + + if (push_element (parser, ELEMENT_ALLOW) == NULL) +@@ -1913,7 +1943,7 @@ start_policy_child (BusConfigParser *parser, + { + if (!append_rule_from_element (parser, element_name, + attribute_names, attribute_values, +- FALSE, error)) ++ BUS_POLICY_RULE_ACCESS_DENY, error)) + return FALSE; + + if (push_element (parser, ELEMENT_DENY) == NULL) +@@ -1922,6 +1952,21 @@ start_policy_child (BusConfigParser *parser, + return FALSE; + } + ++ return TRUE; ++ } ++ else if (strcmp (element_name, "check") == 0) ++ { ++ if (!append_rule_from_element (parser, element_name, ++ attribute_names, attribute_values, ++ BUS_POLICY_RULE_ACCESS_CHECK, error)) ++ return FALSE; ++ ++ if (push_element (parser, ELEMENT_CHECK) == NULL) ++ { ++ BUS_SET_OOM (error); ++ return FALSE; ++ } ++ + return TRUE; + } + else +@@ -2284,6 +2329,7 @@ bus_config_parser_end_element (BusConfigParser *parser, + case ELEMENT_POLICY: + case ELEMENT_ALLOW: + case ELEMENT_DENY: ++ case ELEMENT_CHECK: + case ELEMENT_FORK: + case ELEMENT_SYSLOG: + case ELEMENT_KEEP_UMASK: +@@ -2600,6 +2646,7 @@ bus_config_parser_content (BusConfigParser *parser, + case ELEMENT_POLICY: + case ELEMENT_ALLOW: + case ELEMENT_DENY: ++ case ELEMENT_CHECK: + case ELEMENT_FORK: + case ELEMENT_SYSLOG: + case ELEMENT_KEEP_UMASK: +@@ -3127,6 +3174,8 @@ do_load (const DBusString *full_path, + dbus_error_init (&error); + + parser = bus_config_load (full_path, TRUE, NULL, &error); ++ if (dbus_error_is_set (&error)) ++ _dbus_verbose ("Failed to load file: %s\n", error.message); + if (parser == NULL) + { + _DBUS_ASSERT_ERROR_IS_SET (&error); +@@ -3359,6 +3408,7 @@ elements_equal (const Element *a, + case ELEMENT_LISTEN: + case ELEMENT_AUTH: + case ELEMENT_ALLOW: ++ case ELEMENT_CHECK: + case ELEMENT_DENY: + case ELEMENT_FORK: + case ELEMENT_PIDFILE: +diff --git a/bus/connection.c b/bus/connection.c +index 53605fa..b348d42 100644 +--- a/bus/connection.c ++++ b/bus/connection.c +@@ -36,6 +36,10 @@ + #include <dbus/dbus-timeout.h> + #include <dbus/dbus-connection-internal.h> + #include <dbus/dbus-internals.h> ++#ifdef DBUS_ENABLE_CYNARA ++#include <stdlib.h> ++#include <cynara-session.h> ++#endif + + /* Trim executed commands to this length; we want to keep logs readable */ + #define MAX_LOG_COMMAND_LEN 50 +@@ -116,6 +120,9 @@ typedef struct + + /** non-NULL if and only if this is a monitor */ + DBusList *link_in_monitors; ++#ifdef DBUS_ENABLE_CYNARA ++ char *cynara_session_id; ++#endif + } BusConnectionData; + + static dbus_bool_t bus_pending_reply_expired (BusExpireList *list, +@@ -129,8 +136,8 @@ static dbus_bool_t expire_incomplete_timeout (void *data); + + #define BUS_CONNECTION_DATA(connection) (dbus_connection_get_data ((connection), connection_data_slot)) + +-static DBusLoop* +-connection_get_loop (DBusConnection *connection) ++DBusLoop* ++bus_connection_get_loop (DBusConnection *connection) + { + BusConnectionData *d; + +@@ -354,7 +361,7 @@ add_connection_watch (DBusWatch *watch, + { + DBusConnection *connection = data; + +- return _dbus_loop_add_watch (connection_get_loop (connection), watch); ++ return _dbus_loop_add_watch (bus_connection_get_loop (connection), watch); + } + + static void +@@ -363,7 +370,7 @@ remove_connection_watch (DBusWatch *watch, + { + DBusConnection *connection = data; + +- _dbus_loop_remove_watch (connection_get_loop (connection), watch); ++ _dbus_loop_remove_watch (bus_connection_get_loop (connection), watch); + } + + static void +@@ -372,7 +379,7 @@ toggle_connection_watch (DBusWatch *watch, + { + DBusConnection *connection = data; + +- _dbus_loop_toggle_watch (connection_get_loop (connection), watch); ++ _dbus_loop_toggle_watch (bus_connection_get_loop (connection), watch); + } + + static dbus_bool_t +@@ -381,7 +388,7 @@ add_connection_timeout (DBusTimeout *timeout, + { + DBusConnection *connection = data; + +- return _dbus_loop_add_timeout (connection_get_loop (connection), timeout); ++ return _dbus_loop_add_timeout (bus_connection_get_loop (connection), timeout); + } + + static void +@@ -390,7 +397,7 @@ remove_connection_timeout (DBusTimeout *timeout, + { + DBusConnection *connection = data; + +- _dbus_loop_remove_timeout (connection_get_loop (connection), timeout); ++ _dbus_loop_remove_timeout (bus_connection_get_loop (connection), timeout); + } + + static void +@@ -448,6 +455,10 @@ free_connection_data (void *data) + + dbus_free (d->name); + ++#ifdef DBUS_ENABLE_CYNARA ++ free (d->cynara_session_id); ++#endif ++ + dbus_free (d); + } + +@@ -1078,6 +1089,22 @@ bus_connection_get_policy (DBusConnection *connection) + return d->policy; + } + ++#ifdef DBUS_ENABLE_CYNARA ++const char *bus_connection_get_cynara_session_id (DBusConnection *connection) ++{ ++ BusConnectionData *d = BUS_CONNECTION_DATA (connection); ++ _dbus_assert (d != NULL); ++ ++ if (d->cynara_session_id == NULL) ++ { ++ unsigned long pid; ++ if (dbus_connection_get_unix_process_id(connection, &pid)) ++ d->cynara_session_id = cynara_session_from_pid(pid); ++ } ++ return d->cynara_session_id; ++} ++#endif ++ + static dbus_bool_t + foreach_active (BusConnections *connections, + BusConnectionForeachFunction function, +@@ -2333,6 +2360,7 @@ bus_transaction_send_from_driver (BusTransaction *transaction, + DBusMessage *message) + { + DBusError error = DBUS_ERROR_INIT; ++ BusResult res; + + /* We have to set the sender to the driver, and have + * to check security policy since it was not done in +@@ -2370,10 +2398,11 @@ bus_transaction_send_from_driver (BusTransaction *transaction, + * if we're actively capturing messages, it's nice to log that we + * tried to send it and did not allow ourselves to do so. + */ +- if (!bus_context_check_security_policy (bus_transaction_get_context (transaction), +- transaction, +- NULL, connection, connection, +- message, NULL, &error)) ++ res = bus_context_check_security_policy (bus_transaction_get_context (transaction), ++ transaction, ++ NULL, connection, connection, message, NULL, ++ &error, NULL); ++ if (res == BUS_RESULT_FALSE) + { + if (!bus_transaction_capture_error_reply (transaction, connection, + &error, message)) +@@ -2388,6 +2417,12 @@ bus_transaction_send_from_driver (BusTransaction *transaction, + dbus_error_free (&error); + return TRUE; + } ++ else if (res == BUS_RESULT_LATER) ++ { ++ _dbus_verbose ("Cannot delay sending message from bus driver, dropping it\n"); ++ dbus_error_free (&error); ++ return TRUE; ++ } + + return bus_transaction_send (transaction, connection, message); + } +diff --git a/bus/connection.h b/bus/connection.h +index 9e253ae..71078ea 100644 +--- a/bus/connection.h ++++ b/bus/connection.h +@@ -31,6 +31,7 @@ + typedef dbus_bool_t (* BusConnectionForeachFunction) (DBusConnection *connection, + void *data); + ++DBusLoop* bus_connection_get_loop (DBusConnection *connection); + + BusConnections* bus_connections_new (BusContext *context); + BusConnections* bus_connections_ref (BusConnections *connections); +@@ -124,6 +125,9 @@ dbus_bool_t bus_connection_be_monitor (DBusConnection *connection, + BusTransaction *transaction, + DBusList **rules, + DBusError *error); ++#ifdef DBUS_ENABLE_CYNARA ++const char *bus_connection_get_cynara_session_id (DBusConnection *connection); ++#endif + + /* transaction API so we can send or not send a block of messages as a whole */ + +diff --git a/bus/cynara.c b/bus/cynara.c +new file mode 100644 +index 0000000..57a4c45 +--- /dev/null ++++ b/bus/cynara.c +@@ -0,0 +1,374 @@ ++/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ ++/* cynara.c Cynara runtime privilege checking ++ * ++ * Copyright (c) 2014 Samsung Electronics, Ltd. ++ * ++ * Licensed under the Academic Free License version 2.1 ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ * ++ * This program 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 General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA ++ * ++ */ ++ ++#include <config.h> ++#include "cynara.h" ++#include "check.h" ++#include "utils.h" ++ ++#include <stdio.h> ++ ++#include <dbus/dbus.h> ++#include <dbus/dbus-watch.h> ++#include <dbus/dbus-connection-internal.h> ++#include <bus/connection.h> ++#ifdef DBUS_ENABLE_CYNARA ++#include <cynara-client-async.h> ++#endif ++ ++ ++#ifdef DBUS_ENABLE_CYNARA ++typedef struct BusCynara ++{ ++ int refcount; ++ ++ BusContext *context; ++ BusCheck *check; ++ cynara_async *cynara; ++ DBusWatch *cynara_watch; ++} BusCynara; ++ ++#define USE_CYNARA_CACHE 1 ++#ifdef USE_CYNARA_CACHE ++#define CYNARA_CACHE_SIZE 1000 ++#endif ++ ++static dbus_bool_t bus_cynara_watch_callback(DBusWatch *watch, ++ unsigned int flags, ++ void *data); ++ ++static void status_callback(int old_fd, ++ int new_fd, ++ cynara_async_status status, ++ void *user_status_data); ++static void bus_cynara_check_response_callback (cynara_check_id check_id, ++ cynara_async_call_cause cause, ++ int response, ++ void *user_response_data); ++#endif ++ ++ ++BusCynara * ++bus_cynara_new(BusCheck *check, DBusError *error) ++{ ++#ifdef DBUS_ENABLE_CYNARA ++ BusContext *context; ++ BusCynara *cynara; ++ cynara_async_configuration *conf = NULL; ++ int ret; ++ ++ cynara = dbus_new(BusCynara, 1); ++ if (cynara == NULL) ++ { ++ BUS_SET_OOM(error); ++ return NULL; ++ } ++ ++ context = bus_check_get_context(check); ++ ++ cynara->refcount = 1; ++ cynara->check = check; ++ cynara->context = context; ++ cynara->cynara_watch = NULL; ++ ++ ret = cynara_async_configuration_create(&conf); ++ if (ret != CYNARA_API_SUCCESS) ++ { ++ dbus_set_error (error, DBUS_ERROR_FAILED, "Failed to create Cynara configuration"); ++ goto out; ++ } ++ ++#ifdef CYNARA_CACHE_SIZE ++ ret = cynara_async_configuration_set_cache_size(conf, CYNARA_CACHE_SIZE); ++ if (ret != CYNARA_API_SUCCESS) ++ { ++ dbus_set_error (error, DBUS_ERROR_FAILED, "Failed to Cynara cache size"); ++ goto out; ++ } ++#endif ++ ++ ret = cynara_async_initialize(&cynara->cynara, conf, &status_callback, cynara); ++ if (ret != CYNARA_API_SUCCESS) ++ { ++ dbus_set_error (error, DBUS_ERROR_FAILED, "Failed to initialize Cynara client"); ++ goto out; ++ } ++ ++out: ++ cynara_async_configuration_destroy(conf); ++ if (ret != CYNARA_API_SUCCESS) ++ { ++ dbus_free(cynara); ++ return NULL; ++ } ++ ++ return cynara; ++#else ++ return NULL; ++#endif ++} ++ ++BusCynara * ++bus_cynara_ref (BusCynara *cynara) ++{ ++#ifdef DBUS_ENABLE_CYNARA ++ _dbus_assert (cynara->refcount > 0); ++ cynara->refcount += 1; ++ ++ return cynara; ++#else ++ return NULL; ++#endif ++} ++ ++void ++bus_cynara_unref (BusCynara *cynara) ++{ ++#ifdef DBUS_ENABLE_CYNARA ++ _dbus_assert (cynara->refcount > 0); ++ ++ cynara->refcount -= 1; ++ ++ if (cynara->refcount == 0) ++ { ++ cynara_async_finish(cynara->cynara); ++ dbus_free(cynara); ++ } ++#endif ++} ++ ++BusResult ++bus_cynara_check_privilege (BusCynara *cynara, ++ DBusMessage *message, ++ DBusConnection *sender, ++ DBusConnection *addressed_recipient, ++ DBusConnection *proposed_recipient, ++ const char *privilege, ++ BusDeferredMessageStatus check_type, ++ BusDeferredMessage **deferred_message_param) ++{ ++#ifdef DBUS_ENABLE_CYNARA ++ int result; ++ unsigned long uid; ++ char *label; ++ const char *session_id; ++ char user[32]; ++ cynara_check_id check_id; ++ DBusConnection *connection = check_type == BUS_DEFERRED_MESSAGE_CHECK_RECEIVE ? proposed_recipient : sender; ++ BusDeferredMessage *deferred_message; ++ BusResult ret; ++ ++ _dbus_assert(connection != NULL); ++ ++ if (dbus_connection_get_unix_user(connection, &uid) == FALSE) ++ return BUS_RESULT_FALSE; ++ ++ if (_dbus_connection_get_linux_security_label(connection, &label) == FALSE || label == NULL) ++ { ++ _dbus_warn("Failed to obtain security label for connection\n"); ++ return BUS_RESULT_FALSE; ++ } ++ ++ session_id = bus_connection_get_cynara_session_id (connection); ++ if (session_id == NULL) ++ { ++ ret = BUS_RESULT_FALSE; ++ goto out; ++ } ++ ++ snprintf(user, sizeof(user), "%lu", uid); ++ ++#if USE_CYNARA_CACHE ++ result = cynara_async_check_cache(cynara->cynara, label, session_id, user, privilege); ++#else ++ result = CYNARA_API_CACHE_MISS; ++#endif ++ ++ switch (result) ++ { ++ case CYNARA_API_ACCESS_ALLOWED: ++ _dbus_verbose("Cynara: got ALLOWED answer from cache (client=%s session_id=%s user=%s privilege=%s)\n", ++ label, session_id, user, privilege); ++ ret = BUS_RESULT_TRUE; ++ break; ++ ++ case CYNARA_API_ACCESS_DENIED: ++ _dbus_verbose("Cynara: got DENIED answer from cache (client=%s session_id=%s user=%s privilege=%s)\n", ++ label, session_id, user, privilege); ++ ret = BUS_RESULT_FALSE; ++ break; ++ ++ case CYNARA_API_CACHE_MISS: ++ deferred_message = bus_deferred_message_new(message, sender, addressed_recipient, ++ proposed_recipient, BUS_RESULT_LATER); ++ if (deferred_message == NULL) ++ { ++ _dbus_verbose("Failed to allocate memory for deferred message\n"); ++ ret = BUS_RESULT_FALSE; ++ goto out; ++ } ++ ++ /* callback is supposed to unref deferred_message*/ ++ result = cynara_async_create_request(cynara->cynara, label, session_id, user, privilege, &check_id, ++ &bus_cynara_check_response_callback, deferred_message); ++ if (result == CYNARA_API_SUCCESS) ++ { ++ _dbus_verbose("Created Cynara request: client=%s session_id=%s user=%s privilege=%s check_id=%u " ++ "deferred_message=%p\n", label, session_id, user, privilege, (unsigned int)check_id, deferred_message); ++ if (deferred_message_param != NULL) ++ *deferred_message_param = deferred_message; ++ ret = BUS_RESULT_LATER; ++ } ++ else ++ { ++ _dbus_verbose("Error on cynara request create: %i\n", result); ++ bus_deferred_message_unref(deferred_message); ++ ret = BUS_RESULT_FALSE; ++ } ++ break; ++ default: ++ _dbus_verbose("Error when accessing Cynara cache: %i\n", result); ++ ret = BUS_RESULT_FALSE; ++ } ++out: ++ dbus_free(label); ++ return ret; ++ ++#else ++ return BUS_RESULT_FALSE; ++#endif ++} ++ ++ ++ ++#ifdef DBUS_ENABLE_CYNARA ++static void ++status_callback(int old_fd, int new_fd, cynara_async_status status, ++ void *user_status_data) ++{ ++ BusCynara *cynara = (BusCynara *)user_status_data; ++ DBusLoop *loop = bus_context_get_loop(cynara->context); ++ ++ if (cynara->cynara_watch != NULL) ++ { ++ _dbus_loop_remove_watch(loop, cynara->cynara_watch); ++ _dbus_watch_invalidate(cynara->cynara_watch); ++ _dbus_watch_unref(cynara->cynara_watch); ++ cynara->cynara_watch = NULL; ++ } ++ ++ if (new_fd != -1) ++ { ++ unsigned int flags; ++ DBusWatch *watch; ++ ++ switch (status) ++ { ++ case CYNARA_STATUS_FOR_READ: ++ flags = DBUS_WATCH_READABLE; ++ break; ++ case CYNARA_STATUS_FOR_RW: ++ flags = DBUS_WATCH_READABLE | DBUS_WATCH_WRITABLE; ++ break; ++ default: ++ /* Cynara passed unknown status - warn and add RW watch */ ++ _dbus_verbose("Cynara passed unknown status value: 0x%08X\n", (unsigned int)status); ++ flags = DBUS_WATCH_READABLE | DBUS_WATCH_WRITABLE; ++ break; ++ } ++ ++ watch = _dbus_watch_new(new_fd, flags, TRUE, &bus_cynara_watch_callback, cynara, NULL); ++ if (watch != NULL) ++ { ++ if (_dbus_loop_add_watch(loop, watch) == TRUE) ++ { ++ cynara->cynara_watch = watch; ++ return; ++ } ++ ++ _dbus_watch_invalidate(watch); ++ _dbus_watch_unref(watch); ++ } ++ ++ /* It seems like not much can be done at this point. Cynara events won't be processed ++ * until next Cynara function call triggering status callback */ ++ _dbus_verbose("Failed to add dbus watch\n"); ++ } ++} ++ ++static dbus_bool_t ++bus_cynara_watch_callback(DBusWatch *watch, ++ unsigned int flags, ++ void *data) ++{ ++ BusCynara *cynara = (BusCynara *)data; ++ int result = cynara_async_process(cynara->cynara); ++ if (result != CYNARA_API_SUCCESS) ++ _dbus_verbose("cynara_async_process returned %d\n", result); ++ ++ return result != CYNARA_API_OUT_OF_MEMORY ? TRUE : FALSE; ++} ++ ++static inline const char * ++call_cause_to_string(cynara_async_call_cause cause) ++{ ++ switch (cause) ++ { ++ case CYNARA_CALL_CAUSE_ANSWER: ++ return "ANSWER"; ++ case CYNARA_CALL_CAUSE_CANCEL: ++ return "CANCEL"; ++ case CYNARA_CALL_CAUSE_FINISH: ++ return "FINSIH"; ++ case CYNARA_CALL_CAUSE_SERVICE_NOT_AVAILABLE: ++ return "SERVICE NOT AVAILABLE"; ++ default: ++ return "INVALID"; ++ } ++} ++ ++static void ++bus_cynara_check_response_callback (cynara_check_id check_id, ++ cynara_async_call_cause cause, ++ int response, ++ void *user_response_data) ++{ ++ BusDeferredMessage *deferred_message = user_response_data; ++ BusResult result; ++ ++ _dbus_verbose("Cynara callback: check_id=%u, cause=%s response=%i response_data=%p\n", ++ (unsigned int)check_id, call_cause_to_string(cause), response, user_response_data); ++ ++ if (deferred_message == NULL) ++ return; ++ ++ if (cause == CYNARA_CALL_CAUSE_ANSWER && response == CYNARA_API_ACCESS_ALLOWED) ++ result = BUS_RESULT_TRUE; ++ else ++ result = BUS_RESULT_FALSE; ++ ++ bus_deferred_message_response_received(deferred_message, result); ++ bus_deferred_message_unref(deferred_message); ++} ++ ++#endif /* DBUS_ENABLE_CYNARA */ +diff --git a/bus/cynara.h b/bus/cynara.h +new file mode 100644 +index 0000000..c4728bb +--- /dev/null ++++ b/bus/cynara.h +@@ -0,0 +1,37 @@ ++/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ ++/* cynara.h Cynara runtime privilege checking ++ * ++ * Copyright (c) 2014 Samsung Electronics, Ltd. ++ * ++ * Licensed under the Academic Free License version 2.1 ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ * ++ * This program 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 General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA ++ * ++ */ ++ ++#include "bus.h" ++#include "check.h" ++ ++BusCynara *bus_cynara_new (BusCheck *check, DBusError *error); ++BusCynara *bus_cynara_ref (BusCynara *cynara); ++void bus_cynara_unref (BusCynara *cynara); ++BusResult bus_cynara_check_privilege (BusCynara *cynara, ++ DBusMessage *message, ++ DBusConnection *sender, ++ DBusConnection *addressed_recipient, ++ DBusConnection *proposed_recipient, ++ const char *privilege, ++ BusDeferredMessageStatus check_type, ++ BusDeferredMessage **deferred_message); +diff --git a/bus/dispatch.c b/bus/dispatch.c +index 19228be..d3867f7 100644 +--- a/bus/dispatch.c ++++ b/bus/dispatch.c +@@ -25,6 +25,7 @@ + + #include <config.h> + #include "dispatch.h" ++#include "check.h" + #include "connection.h" + #include "driver.h" + #include "services.h" +@@ -64,14 +65,18 @@ send_one_message (DBusConnection *connection, + DBusError *error) + { + DBusError stack_error = DBUS_ERROR_INIT; ++ BusDeferredMessage *deferred_message; ++ BusResult result; + +- if (!bus_context_check_security_policy (context, transaction, ++ result = bus_context_check_security_policy (context, transaction, + sender, + addressed_recipient, + connection, + message, + NULL, +- &stack_error)) ++ &stack_error, ++ &deferred_message); ++ if (result != BUS_RESULT_TRUE) + { + if (!bus_transaction_capture_error_reply (transaction, sender, + &stack_error, message)) +@@ -130,6 +135,8 @@ bus_dispatch_matches (BusTransaction *transaction, + BusMatchmaker *matchmaker; + DBusList *link; + BusContext *context; ++ BusDeferredMessage *deferred_message; ++ BusResult res; + + _DBUS_ASSERT_ERROR_IS_CLEAR (error); + +@@ -145,11 +152,20 @@ bus_dispatch_matches (BusTransaction *transaction, + /* First, send the message to the addressed_recipient, if there is one. */ + if (addressed_recipient != NULL) + { +- if (!bus_context_check_security_policy (context, transaction, +- sender, addressed_recipient, +- addressed_recipient, +- message, NULL, error)) ++ res = bus_context_check_security_policy (context, transaction, ++ sender, addressed_recipient, ++ addressed_recipient, ++ message, NULL, error, ++ &deferred_message); ++ if (res == BUS_RESULT_FALSE) + return FALSE; ++ else if (res == BUS_RESULT_LATER) ++ { ++ dbus_set_error (error, ++ DBUS_ERROR_ACCESS_DENIED, ++ "Rejecting message because time is needed to check security policy"); ++ return FALSE; ++ } + + if (dbus_message_contains_unix_fds (message) && + !dbus_connection_can_send_type (addressed_recipient, +@@ -374,19 +390,31 @@ bus_dispatch (DBusConnection *connection, + if (service_name && + strcmp (service_name, DBUS_SERVICE_DBUS) == 0) /* to bus driver */ + { ++ BusDeferredMessage *deferred_message; ++ BusResult res; ++ + if (!bus_transaction_capture (transaction, connection, NULL, message)) + { + BUS_SET_OOM (&error); + goto out; + } + +- if (!bus_context_check_security_policy (context, transaction, +- connection, NULL, NULL, message, +- NULL, &error)) ++ res = bus_context_check_security_policy (context, transaction, ++ connection, NULL, NULL, message, NULL, ++ &error, &deferred_message); ++ if (res == BUS_RESULT_FALSE) + { + _dbus_verbose ("Security policy rejected message\n"); + goto out; + } ++ else if (res == BUS_RESULT_LATER) ++ { ++ dbus_set_error (&error, ++ DBUS_ERROR_ACCESS_DENIED, ++ "Rejecting message because time is needed to check security policy"); ++ _dbus_verbose ("Security policy needs time to check policy. Dropping message\n"); ++ goto out; ++ } + + _dbus_verbose ("Giving message to %s\n", DBUS_SERVICE_DBUS); + if (!bus_driver_handle_message (connection, transaction, message, &error)) +diff --git a/bus/driver.h b/bus/driver.h +index ac1289d..a7297ad 100644 +--- a/bus/driver.h ++++ b/bus/driver.h +@@ -66,5 +66,7 @@ dbus_bool_t bus_driver_send_ack_reply (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, + DBusError *error); ++dbus_bool_t bus_driver_check_message_is_for_us (DBusMessage *message, ++ DBusError *error); + + #endif /* BUS_DRIVER_H */ +diff --git a/bus/policy.c b/bus/policy.c +index a37be80..7de92c6 100644 +--- a/bus/policy.c ++++ b/bus/policy.c +@@ -22,6 +22,7 @@ + */ + + #include <config.h> ++#include "check.h" + #include "policy.h" + #include "services.h" + #include "test.h" +@@ -33,7 +34,7 @@ + + BusPolicyRule* + bus_policy_rule_new (BusPolicyRuleType type, +- dbus_bool_t allow) ++ BusPolicyRuleAccess access) + { + BusPolicyRule *rule; + +@@ -43,7 +44,7 @@ bus_policy_rule_new (BusPolicyRuleType type, + + rule->type = type; + rule->refcount = 1; +- rule->allow = allow; ++ rule->access = access; + + switch (rule->type) + { +@@ -55,18 +56,19 @@ bus_policy_rule_new (BusPolicyRuleType type, + break; + case BUS_POLICY_RULE_SEND: + rule->d.send.message_type = DBUS_MESSAGE_TYPE_INVALID; +- + /* allow rules default to TRUE (only requested replies allowed) ++ * check rules default to TRUE (only requested replies are checked) + * deny rules default to FALSE (only unrequested replies denied) + */ +- rule->d.send.requested_reply = rule->allow; ++ rule->d.send.requested_reply = rule->access != BUS_POLICY_RULE_ACCESS_DENY; + break; + case BUS_POLICY_RULE_RECEIVE: + rule->d.receive.message_type = DBUS_MESSAGE_TYPE_INVALID; + /* allow rules default to TRUE (only requested replies allowed) ++ * check rules default to TRUE (only requested replies are checked) + * deny rules default to FALSE (only unrequested replies denied) + */ +- rule->d.receive.requested_reply = rule->allow; ++ rule->d.receive.requested_reply = rule->access != BUS_POLICY_RULE_ACCESS_DENY; + break; + case BUS_POLICY_RULE_OWN: + break; +@@ -122,7 +124,8 @@ bus_policy_rule_unref (BusPolicyRule *rule) + default: + _dbus_assert_not_reached ("invalid rule"); + } +- ++ ++ dbus_free (rule->privilege); + dbus_free (rule); + } + } +@@ -435,7 +438,10 @@ list_allows_user (dbus_bool_t def, + else + continue; + +- allowed = rule->allow; ++ /* We don't intend to support <check user="..." /> and <check group="..." /> ++ rules. They are treated like deny. ++ */ ++ allowed = rule->access == BUS_POLICY_RULE_ACCESS_ALLOW; + } + + return allowed; +@@ -873,18 +879,23 @@ bus_client_policy_append_rule (BusClientPolicy *policy, + return TRUE; + } + +-dbus_bool_t +-bus_client_policy_check_can_send (BusClientPolicy *policy, +- BusRegistry *registry, +- dbus_bool_t requested_reply, +- DBusConnection *receiver, +- DBusMessage *message, +- dbus_int32_t *toggles, +- dbus_bool_t *log) ++BusResult ++bus_client_policy_check_can_send (DBusConnection *sender, ++ BusClientPolicy *policy, ++ BusRegistry *registry, ++ dbus_bool_t requested_reply, ++ DBusConnection *addressed_recipient, ++ DBusConnection *receiver, ++ DBusMessage *message, ++ dbus_int32_t *toggles, ++ dbus_bool_t *log, ++ const char **privilege_param, ++ BusDeferredMessage **deferred_message) + { + DBusList *link; +- dbus_bool_t allowed; +- ++ BusResult result; ++ const char *privilege; ++ + /* policy->rules is in the order the rules appeared + * in the config file, i.e. last rule that applies wins + */ +@@ -892,7 +903,7 @@ bus_client_policy_check_can_send (BusClientPolicy *policy, + _dbus_verbose (" (policy) checking send rules\n"); + *toggles = 0; + +- allowed = FALSE; ++ result = BUS_RESULT_FALSE; + link = _dbus_list_get_first_link (&policy->rules); + while (link != NULL) + { +@@ -923,13 +934,14 @@ bus_client_policy_check_can_send (BusClientPolicy *policy, + /* If it's a reply, the requested_reply flag kicks in */ + if (dbus_message_get_reply_serial (message) != 0) + { +- /* for allow, requested_reply=true means the rule applies +- * only when reply was requested. requested_reply=false means +- * always allow. ++ /* for allow or check requested_reply=true means the rule applies ++ * only when reply was requested. requested_reply=false means the ++ * rule always applies + */ +- if (!requested_reply && rule->allow && rule->d.send.requested_reply && !rule->d.send.eavesdrop) ++ if (!requested_reply && rule->access != BUS_POLICY_RULE_ACCESS_DENY && rule->d.send.requested_reply && !rule->d.send.eavesdrop) + { +- _dbus_verbose (" (policy) skipping allow rule since it only applies to requested replies and does not allow eavesdropping\n"); ++ _dbus_verbose (" (policy) skipping %s rule since it only applies to requested replies and does not allow eavesdropping\n", ++ rule->access == BUS_POLICY_RULE_ACCESS_ALLOW ? "allow" : "check"); + continue; + } + +@@ -937,7 +949,7 @@ bus_client_policy_check_can_send (BusClientPolicy *policy, + * when the reply was not requested. requested_reply=true means the + * rule always applies. + */ +- if (requested_reply && !rule->allow && !rule->d.send.requested_reply) ++ if (requested_reply && rule->access == BUS_POLICY_RULE_ACCESS_DENY && !rule->d.send.requested_reply) + { + _dbus_verbose (" (policy) skipping deny rule since it only applies to unrequested replies\n"); + continue; +@@ -960,13 +972,15 @@ bus_client_policy_check_can_send (BusClientPolicy *policy, + /* The interface is optional in messages. For allow rules, if the message + * has no interface we want to skip the rule (and thus not allow); + * for deny rules, if the message has no interface we want to use the +- * rule (and thus deny). ++ * rule (and thus deny). Check rules are meant to be used like allow ++ * rules (they can grant access, but not remove it), so we treat it like ++ * allow here. + */ + dbus_bool_t no_interface; + + no_interface = dbus_message_get_interface (message) == NULL; + +- if ((no_interface && rule->allow) || ++ if ((no_interface && rule->access != BUS_POLICY_RULE_ACCESS_DENY) || + (!no_interface && + strcmp (dbus_message_get_interface (message), + rule->d.send.interface) != 0)) +@@ -1079,33 +1093,64 @@ bus_client_policy_check_can_send (BusClientPolicy *policy, + } + + /* Use this rule */ +- allowed = rule->allow; ++ switch (rule->access) ++ { ++ case BUS_POLICY_RULE_ACCESS_ALLOW: ++ result = BUS_RESULT_TRUE; ++ break; ++ case BUS_POLICY_RULE_ACCESS_DENY: ++ default: ++ result = BUS_RESULT_FALSE; ++ break; ++ case BUS_POLICY_RULE_ACCESS_CHECK: ++ result = BUS_RESULT_LATER; ++ privilege = rule->privilege; ++ break; ++ } ++ + *log = rule->d.send.log; + (*toggles)++; + +- _dbus_verbose (" (policy) used rule, allow now = %d\n", +- allowed); ++ _dbus_verbose (" (policy) used rule, result now = %d\n", ++ (int)(intptr_t)result); + } + +- return allowed; ++ if (result == BUS_RESULT_LATER) ++ { ++ BusContext *context = bus_connection_get_context(sender); ++ BusCheck *check = bus_context_get_check(context); ++ ++ result = bus_check_privilege(check, message, sender, addressed_recipient, receiver, ++ privilege, BUS_DEFERRED_MESSAGE_CHECK_SEND, deferred_message); ++ } ++ else ++ privilege = NULL; ++ ++ if (privilege_param != NULL) ++ *privilege_param = privilege; ++ ++ return result; + } + + /* See docs on what the args mean on bus_context_check_security_policy() + * comment + */ +-dbus_bool_t +-bus_client_policy_check_can_receive (BusClientPolicy *policy, +- BusRegistry *registry, +- dbus_bool_t requested_reply, +- DBusConnection *sender, +- DBusConnection *addressed_recipient, +- DBusConnection *proposed_recipient, +- DBusMessage *message, +- dbus_int32_t *toggles) ++BusResult ++bus_client_policy_check_can_receive (BusClientPolicy *policy, ++ BusRegistry *registry, ++ dbus_bool_t requested_reply, ++ DBusConnection *sender, ++ DBusConnection *addressed_recipient, ++ DBusConnection *proposed_recipient, ++ DBusMessage *message, ++ dbus_int32_t *toggles, ++ const char **privilege_param, ++ BusDeferredMessage **deferred_message) + { + DBusList *link; +- dbus_bool_t allowed; + dbus_bool_t eavesdropping; ++ BusResult result; ++ const char *privilege; + + eavesdropping = + addressed_recipient != proposed_recipient && +@@ -1118,7 +1163,7 @@ bus_client_policy_check_can_receive (BusClientPolicy *policy, + _dbus_verbose (" (policy) checking receive rules, eavesdropping = %d\n", eavesdropping); + *toggles = 0; + +- allowed = FALSE; ++ result = BUS_RESULT_FALSE; + link = _dbus_list_get_first_link (&policy->rules); + while (link != NULL) + { +@@ -1141,19 +1186,21 @@ bus_client_policy_check_can_receive (BusClientPolicy *policy, + } + } + +- /* for allow, eavesdrop=false means the rule doesn't apply when +- * eavesdropping. eavesdrop=true means always allow. ++ ++ /* for allow or check, eavesdrop=false means the rule doesn't apply when ++ * eavesdropping. eavesdrop=true means the rule always applies + */ +- if (eavesdropping && rule->allow && !rule->d.receive.eavesdrop) ++ if (eavesdropping && rule->access != BUS_POLICY_RULE_ACCESS_DENY && !rule->d.receive.eavesdrop) + { +- _dbus_verbose (" (policy) skipping allow rule since it doesn't apply to eavesdropping\n"); ++ _dbus_verbose (" (policy) skipping %s rule since it doesn't apply to eavesdropping\n", ++ rule->access == BUS_POLICY_RULE_ACCESS_ALLOW ? "allow" : "check"); + continue; + } + + /* for deny, eavesdrop=true means the rule applies only when + * eavesdropping; eavesdrop=false means always deny. + */ +- if (!eavesdropping && !rule->allow && rule->d.receive.eavesdrop) ++ if (!eavesdropping && rule->access == BUS_POLICY_RULE_ACCESS_DENY && rule->d.receive.eavesdrop) + { + _dbus_verbose (" (policy) skipping deny rule since it only applies to eavesdropping\n"); + continue; +@@ -1162,13 +1209,14 @@ bus_client_policy_check_can_receive (BusClientPolicy *policy, + /* If it's a reply, the requested_reply flag kicks in */ + if (dbus_message_get_reply_serial (message) != 0) + { +- /* for allow, requested_reply=true means the rule applies +- * only when reply was requested. requested_reply=false means +- * always allow. ++ /* for allow or check requested_reply=true means the rule applies ++ * only when reply was requested. requested_reply=false means the ++ * rule always applies + */ +- if (!requested_reply && rule->allow && rule->d.receive.requested_reply && !rule->d.receive.eavesdrop) ++ if (!requested_reply && rule->access != BUS_POLICY_RULE_ACCESS_DENY && rule->d.send.requested_reply && !rule->d.send.eavesdrop) + { +- _dbus_verbose (" (policy) skipping allow rule since it only applies to requested replies and does not allow eavesdropping\n"); ++ _dbus_verbose (" (policy) skipping %s rule since it only applies to requested replies and does not allow eavesdropping\n", ++ rule->access == BUS_POLICY_RULE_ACCESS_DENY ? "allow" : "deny"); + continue; + } + +@@ -1176,7 +1224,7 @@ bus_client_policy_check_can_receive (BusClientPolicy *policy, + * when the reply was not requested. requested_reply=true means the + * rule always applies. + */ +- if (requested_reply && !rule->allow && !rule->d.receive.requested_reply) ++ if (requested_reply && rule->access == BUS_POLICY_RULE_ACCESS_DENY && !rule->d.receive.requested_reply) + { + _dbus_verbose (" (policy) skipping deny rule since it only applies to unrequested replies\n"); + continue; +@@ -1199,13 +1247,13 @@ bus_client_policy_check_can_receive (BusClientPolicy *policy, + /* The interface is optional in messages. For allow rules, if the message + * has no interface we want to skip the rule (and thus not allow); + * for deny rules, if the message has no interface we want to use the +- * rule (and thus deny). ++ * rule (and thus deny). Check rules are treated like allow rules. + */ + dbus_bool_t no_interface; + + no_interface = dbus_message_get_interface (message) == NULL; + +- if ((no_interface && rule->allow) || ++ if ((no_interface && rule->access != BUS_POLICY_RULE_ACCESS_DENY) || + (!no_interface && + strcmp (dbus_message_get_interface (message), + rule->d.receive.interface) != 0)) +@@ -1295,14 +1343,43 @@ bus_client_policy_check_can_receive (BusClientPolicy *policy, + } + + /* Use this rule */ +- allowed = rule->allow; ++ switch (rule->access) ++ { ++ case BUS_POLICY_RULE_ACCESS_ALLOW: ++ result = BUS_RESULT_TRUE; ++ break; ++ case BUS_POLICY_RULE_ACCESS_DENY: ++ default: ++ result = BUS_RESULT_FALSE; ++ break; ++ case BUS_POLICY_RULE_ACCESS_CHECK: ++ result = BUS_RESULT_LATER; ++ privilege = rule->privilege; ++ break; ++ } ++ + (*toggles)++; + +- _dbus_verbose (" (policy) used rule, allow now = %d\n", +- allowed); ++ _dbus_verbose (" (policy) used rule, result now = %d\n", ++ (int)(intptr_t)result); + } + +- return allowed; ++ ++ if (result == BUS_RESULT_LATER) ++ { ++ BusContext *context = bus_connection_get_context(proposed_recipient); ++ BusCheck *check = bus_context_get_check(context); ++ ++ result = bus_check_privilege(check, message, sender, addressed_recipient, proposed_recipient, ++ privilege, BUS_DEFERRED_MESSAGE_CHECK_RECEIVE, deferred_message); ++ } ++ else ++ privilege = NULL; ++ ++ if (privilege_param != NULL) ++ *privilege_param = privilege; ++ ++ return result; + } + + +@@ -1354,7 +1431,7 @@ bus_rules_check_can_own (DBusList *rules, + } + + /* Use this rule */ +- allowed = rule->allow; ++ allowed = rule->access == BUS_POLICY_RULE_ACCESS_ALLOW; + } + + return allowed; +diff --git a/bus/policy.h b/bus/policy.h +index ec43ffa..f839d23 100644 +--- a/bus/policy.h ++++ b/bus/policy.h +@@ -46,6 +46,14 @@ typedef enum + BUS_POLICY_TRISTATE_TRUE + } BusPolicyTristate; + ++typedef enum ++{ ++ BUS_POLICY_RULE_ACCESS_DENY, ++ BUS_POLICY_RULE_ACCESS_ALLOW, ++ /** runtime check resulting in allow or deny */ ++ BUS_POLICY_RULE_ACCESS_CHECK ++} BusPolicyRuleAccess; ++ + /** determines whether the rule affects a connection, or some global item */ + #define BUS_POLICY_RULE_IS_PER_CLIENT(rule) (!((rule)->type == BUS_POLICY_RULE_USER || \ + (rule)->type == BUS_POLICY_RULE_GROUP)) +@@ -56,8 +64,9 @@ struct BusPolicyRule + + BusPolicyRuleType type; + +- unsigned int allow : 1; /**< #TRUE if this allows, #FALSE if it denies */ +- ++ unsigned int access : 2; /**< BusPolicyRuleAccess */ ++ char *privilege; /**< for BUS_POLICY_RULE_ACCESS_CHECK */ ++ + union + { + struct +@@ -118,7 +127,7 @@ struct BusPolicyRule + }; + + BusPolicyRule* bus_policy_rule_new (BusPolicyRuleType type, +- dbus_bool_t allow); ++ BusPolicyRuleAccess access); + BusPolicyRule* bus_policy_rule_ref (BusPolicyRule *rule); + void bus_policy_rule_unref (BusPolicyRule *rule); + +@@ -152,21 +161,27 @@ dbus_bool_t bus_policy_merge (BusPolicy *policy, + BusClientPolicy* bus_client_policy_new (void); + BusClientPolicy* bus_client_policy_ref (BusClientPolicy *policy); + void bus_client_policy_unref (BusClientPolicy *policy); +-dbus_bool_t bus_client_policy_check_can_send (BusClientPolicy *policy, ++BusResult bus_client_policy_check_can_send (DBusConnection *sender, ++ BusClientPolicy *policy, + BusRegistry *registry, + dbus_bool_t requested_reply, ++ DBusConnection *addressed_recipient, + DBusConnection *receiver, + DBusMessage *message, + dbus_int32_t *toggles, +- dbus_bool_t *log); +-dbus_bool_t bus_client_policy_check_can_receive (BusClientPolicy *policy, ++ dbus_bool_t *log, ++ const char **privilege_param, ++ BusDeferredMessage **deferred_message); ++BusResult bus_client_policy_check_can_receive (BusClientPolicy *policy, + BusRegistry *registry, + dbus_bool_t requested_reply, + DBusConnection *sender, + DBusConnection *addressed_recipient, + DBusConnection *proposed_recipient, + DBusMessage *message, +- dbus_int32_t *toggles); ++ dbus_int32_t *toggles, ++ const char **privilege_param, ++ BusDeferredMessage **deferred_message); + dbus_bool_t bus_client_policy_check_can_own (BusClientPolicy *policy, + const DBusString *service_name); + dbus_bool_t bus_client_policy_append_rule (BusClientPolicy *policy, +diff --git a/configure.ac b/configure.ac +index d1e3a29..11b5ffd 100644 +--- a/configure.ac ++++ b/configure.ac +@@ -1742,6 +1742,17 @@ AC_ARG_ENABLE([user-session], + AM_CONDITIONAL([DBUS_ENABLE_USER_SESSION], + [test "x$enable_user_session" = xyes]) + ++#enable cynara integration ++AC_ARG_ENABLE([cynara], [AS_HELP_STRING([--enable-cynara], [enable Cynara integration])], [], [enable_cynara=no]) ++if test "x$enable_cynara" = xyes; then ++ PKG_CHECK_MODULES([CYNARA], [cynara-client-async >= 0.6.0 cynara-session >= 0.6.0], ++ [AC_DEFINE([DBUS_ENABLE_CYNARA], [1], [Define to enable Cynara privilege checks in dbus-daemon])], ++ [AC_MSG_ERROR([libcynara-client-async and cynara-session are required to enable Cynara integration])]) ++fi ++ ++AC_SUBST([CYNARA_CFLAGS]) ++AC_SUBST([CYNARA_LIBS]) ++ + AC_CONFIG_FILES([ + Doxyfile + dbus/Version +@@ -1824,6 +1835,7 @@ echo " + Building bus stats API: ${enable_stats} + Building SELinux support: ${have_selinux} + Building AppArmor support: ${have_apparmor} ++ Building Cynara support: ${enable_cynara} + Building inotify support: ${have_inotify} + Building kqueue support: ${have_kqueue} + Building systemd support: ${have_systemd} +diff --git a/test/Makefile.am b/test/Makefile.am +index af1e13b..e6f50e1 100644 +--- a/test/Makefile.am ++++ b/test/Makefile.am +@@ -439,6 +439,7 @@ in_data = \ + data/valid-config-files/debug-allow-all.conf.in \ + data/valid-config-files/finite-timeout.conf.in \ + data/valid-config-files/forbidding.conf.in \ ++ data/valid-config-files/debug-check-some.conf.in \ + data/valid-config-files/incoming-limit.conf.in \ + data/valid-config-files/max-completed-connections.conf.in \ + data/valid-config-files/max-connections-per-user.conf.in \ +diff --git a/test/data/invalid-config-files/badcheck-1.conf b/test/data/invalid-config-files/badcheck-1.conf +new file mode 100644 +index 0000000..fad9f50 +--- /dev/null ++++ b/test/data/invalid-config-files/badcheck-1.conf +@@ -0,0 +1,9 @@ ++<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN" ++ "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd"> ++<busconfig> ++ <user>mybususer</user> ++ <listen>unix:path=/foo/bar</listen> ++ <policy context="default"> ++ <allow privilege="foo" send_destination="*"/> <!-- extra privilege="foo" --> ++ </policy> ++</busconfig> +diff --git a/test/data/invalid-config-files/badcheck-2.conf b/test/data/invalid-config-files/badcheck-2.conf +new file mode 100644 +index 0000000..63c7ef2 +--- /dev/null ++++ b/test/data/invalid-config-files/badcheck-2.conf +@@ -0,0 +1,9 @@ ++<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN" ++ "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd"> ++<busconfig> ++ <user>mybususer</user> ++ <listen>unix:path=/foo/bar</listen> ++ <policy context="default"> ++ <check send_destination="*"/> <!-- missing privilege="foo" --> ++ </policy> ++</busconfig> +diff --git a/test/data/valid-config-files/check-1.conf b/test/data/valid-config-files/check-1.conf +new file mode 100644 +index 0000000..ad71473 +--- /dev/null ++++ b/test/data/valid-config-files/check-1.conf +@@ -0,0 +1,9 @@ ++<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN" ++ "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd"> ++<busconfig> ++ <user>mybususer</user> ++ <listen>unix:path=/foo/bar</listen> ++ <policy context="default"> ++ <check privilege="foo" send_destination="*"/> ++ </policy> ++</busconfig> +diff --git a/test/data/valid-config-files/debug-check-some.conf.in b/test/data/valid-config-files/debug-check-some.conf.in +new file mode 100644 +index 0000000..47ee854 +--- /dev/null ++++ b/test/data/valid-config-files/debug-check-some.conf.in +@@ -0,0 +1,18 @@ ++<!-- Bus that listens on a debug pipe and doesn't create any restrictions --> ++ ++<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN" ++ "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd"> ++<busconfig> ++ <listen>debug-pipe:name=test-server</listen> ++ <listen>@TEST_LISTEN@</listen> ++ <servicedir>@DBUS_TEST_DATA@/valid-service-files</servicedir> ++ <policy context="default"> ++ <allow send_interface="*"/> ++ <allow receive_interface="*"/> ++ <allow own="*"/> ++ <allow user="*"/> ++ ++ <deny send_interface="org.freedesktop.TestSuite" send_member="Echo"/> ++ <check privilege="foo" send_interface="org.freedesktop.TestSuite" send_member="Echo"/> ++ </policy> ++</busconfig> +-- +2.21.1 + diff --git a/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0002-Disable-message-dispatching-when-send-rule-result-is.patch b/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0002-Disable-message-dispatching-when-send-rule-result-is.patch new file mode 100644 index 000000000..bac8cf97f --- /dev/null +++ b/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0002-Disable-message-dispatching-when-send-rule-result-is.patch @@ -0,0 +1,967 @@ +From c2f4ba585c777b731df6b6b8a165b6cc4dc5d639 Mon Sep 17 00:00:00 2001 +From: Jacek Bukarewicz <j.bukarewicz@samsung.com> +Date: Fri, 28 Nov 2014 12:07:39 +0100 +Subject: [PATCH 2/8] Disable message dispatching when send rule result is not + known +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +When unicast message is sent to addressed recipient and policy result +is not available message dispatch from the sender is disabled. +This also means that any further messages from the given connection are +put into the incoming queue without being processed. If response is received +message dispatching is resumed. This time answer is attached to the message +which is now processed synchronously. +Receive rule result unavailability is not yet handled - such messages are +rejected. Also, if message is sent to non-addressed recipient and policy result +is unknown, message is silently dropped. + +Cherry-picked from b1b87ad9f20b2052c28431b48e81073078a745ce +by Jose Bollo. + +Updated for dbus 1.10.20 by Scott Murray and José Bollo + +Signed-off-by: José Bollo <jose.bollo@iot.bzh> +Signed-off-by: Scott Murray <scott.murray@konsulko.com> +--- + bus/activation.c | 76 +++++++++++-- + bus/check.c | 109 +++++++++++++++++-- + bus/check.h | 10 ++ + bus/cynara.c | 1 - + bus/dispatch.c | 184 ++++++++++++++++++++++++++++---- + bus/dispatch.h | 2 +- + bus/driver.c | 12 ++- + dbus/dbus-connection-internal.h | 15 +++ + dbus/dbus-connection.c | 125 +++++++++++++++++++++- + dbus/dbus-list.c | 29 +++++ + dbus/dbus-list.h | 3 + + dbus/dbus-shared.h | 3 +- + 12 files changed, 528 insertions(+), 41 deletions(-) + +diff --git a/bus/activation.c b/bus/activation.c +index f9c6c62..8301b59 100644 +--- a/bus/activation.c ++++ b/bus/activation.c +@@ -32,6 +32,7 @@ + #include "services.h" + #include "test.h" + #include "utils.h" ++#include <dbus/dbus-connection-internal.h> + #include <dbus/dbus-internals.h> + #include <dbus/dbus-hash.h> + #include <dbus/dbus-list.h> +@@ -94,6 +95,8 @@ struct BusPendingActivationEntry + DBusConnection *connection; + + dbus_bool_t auto_activation; ++ ++ dbus_bool_t is_put_back; + }; + + typedef struct +@@ -1241,20 +1244,23 @@ bus_activation_send_pending_auto_activation_messages (BusActivation *activation + BusPendingActivationEntry *entry = link->data; + DBusList *next = _dbus_list_get_next_link (&pending_activation->entries, link); + +- if (entry->auto_activation && (entry->connection == NULL || dbus_connection_get_is_connected (entry->connection))) ++ if (entry->auto_activation && !entry->is_put_back && ++ (entry->connection == NULL || dbus_connection_get_is_connected (entry->connection))) + { + DBusConnection *addressed_recipient; + DBusError error; ++ BusResult res; + + dbus_error_init (&error); + + addressed_recipient = bus_service_get_primary_owners_connection (service); + + /* Resume dispatching where we left off in bus_dispatch() */ +- if (!bus_dispatch_matches (transaction, +- entry->connection, +- addressed_recipient, +- entry->activation_message, &error)) ++ res = bus_dispatch_matches (transaction, ++ entry->connection, ++ addressed_recipient, ++ entry->activation_message, &error); ++ if (res == BUS_RESULT_FALSE) + { + /* If permission is denied, we just want to return the error + * to the original method invoker; in particular, we don't +@@ -1266,11 +1272,44 @@ bus_activation_send_pending_auto_activation_messages (BusActivation *activation + bus_connection_send_oom_error (entry->connection, + entry->activation_message); + } +- + dbus_error_free (&error); + link = next; + continue; + } ++ else if (res == BUS_RESULT_LATER) ++ { ++ DBusList *putback_message_link = link; ++ DBusMessage *last_inserted_message = NULL; ++ ++ /* NULL entry->connection implies sending pending ActivationRequest message to systemd */ ++ if (entry->connection == NULL) ++ { ++ _dbus_assert_not_reached ("bus_dispatch_matches returned BUS_RESULT_LATER unexpectedly when sender is NULL"); ++ link = next; ++ continue; ++ } ++ ++ /** ++ * Getting here means that policy check result is not yet available and dispatching ++ * messages from entry->connection has been disabled. ++ * Let's put back all messages for the given connection in the incoming queue and mark ++ * this entry as put back so they are not handled twice. ++ */ ++ while (putback_message_link != NULL) ++ { ++ BusPendingActivationEntry *putback_message = putback_message_link->data; ++ if (putback_message->connection == entry->connection) ++ { ++ if (!_dbus_connection_putback_message (putback_message->connection, last_inserted_message, ++ putback_message->activation_message, &error)) ++ goto error; ++ last_inserted_message = putback_message->activation_message; ++ putback_message->is_put_back = TRUE; ++ } ++ ++ putback_message_link = _dbus_list_get_next_link(&pending_activation->entries, putback_message_link); ++ } ++ } + } + + link = next; +@@ -1287,6 +1326,19 @@ bus_activation_send_pending_auto_activation_messages (BusActivation *activation + return TRUE; + + error: ++ /* remove all messages that have been put to connections' incoming queues */ ++ link = _dbus_list_get_first_link (&pending_activation->entries); ++ while (link != NULL) ++ { ++ BusPendingActivationEntry *entry = link->data; ++ if (entry->is_put_back) ++ { ++ _dbus_connection_remove_message(entry->connection, entry->activation_message); ++ entry->is_put_back = FALSE; ++ } ++ link = _dbus_list_get_next_link(&pending_activation->entries, link); ++ } ++ + return FALSE; + } + +@@ -2079,6 +2131,7 @@ bus_activation_activate_service (BusActivation *activation, + + if (service != NULL) + { ++ BusResult res; + bus_context_log (activation->context, + DBUS_SYSTEM_LOG_INFO, "Activating via systemd: service name='%s' unit='%s' requested by '%s' (%s)", + service_name, +@@ -2086,8 +2139,17 @@ bus_activation_activate_service (BusActivation *activation, + bus_connection_get_name (connection), + bus_connection_get_loginfo (connection)); + /* Wonderful, systemd is connected, let's just send the msg */ +- retval = bus_dispatch_matches (activation_transaction, NULL, ++ res = bus_dispatch_matches (activation_transaction, NULL, + systemd, message, error); ++ ++ if (res == BUS_RESULT_TRUE) ++ retval = TRUE; ++ else ++ { ++ retval = FALSE; ++ if (res == BUS_RESULT_LATER) ++ _dbus_verbose("Unexpectedly need time to check message from bus driver to systemd - dropping the message.\n"); ++ } + } + else + { +diff --git a/bus/check.c b/bus/check.c +index 5b72d31..4b8a699 100644 +--- a/bus/check.c ++++ b/bus/check.c +@@ -55,6 +55,8 @@ typedef struct BusDeferredMessage + BusCheckResponseFunc response_callback; + } BusDeferredMessage; + ++static dbus_int32_t deferred_message_data_slot = -1; ++ + BusCheck * + bus_check_new (BusContext *context, DBusError *error) + { +@@ -67,11 +69,19 @@ bus_check_new (BusContext *context, DBusError *error) + return NULL; + } + ++ if (!dbus_message_allocate_data_slot(&deferred_message_data_slot)) ++ { ++ dbus_free(check); ++ BUS_SET_OOM(error); ++ return NULL; ++ } ++ + check->refcount = 1; + check->context = context; + check->cynara = bus_cynara_new(check, error); + if (dbus_error_is_set(error)) + { ++ dbus_message_free_data_slot(&deferred_message_data_slot); + dbus_free(check); + return NULL; + } +@@ -98,6 +108,7 @@ bus_check_unref (BusCheck *check) + if (check->refcount == 0) + { + bus_cynara_unref(check->cynara); ++ dbus_message_free_data_slot(&deferred_message_data_slot); + dbus_free(check); + } + } +@@ -114,6 +125,45 @@ bus_check_get_cynara (BusCheck *check) + return check->cynara; + } + ++static void ++bus_check_enable_dispatch_callback (BusDeferredMessage *deferred_message, ++ BusResult result) ++{ ++ _dbus_verbose("bus_check_enable_dispatch_callback called deferred_message=%p\n", deferred_message); ++ ++ deferred_message->response = result; ++ _dbus_connection_enable_dispatch(deferred_message->sender); ++} ++ ++static void ++deferred_message_free_function(void *data) ++{ ++ BusDeferredMessage *deferred_message = (BusDeferredMessage *)data; ++ bus_deferred_message_unref(deferred_message); ++} ++ ++void ++bus_deferred_message_disable_sender (BusDeferredMessage *deferred_message) ++{ ++ _dbus_assert(deferred_message != NULL); ++ _dbus_assert(deferred_message->sender != NULL); ++ ++ if (dbus_message_get_data(deferred_message->message, deferred_message_data_slot) == NULL) ++ { ++ if (dbus_message_set_data(deferred_message->message, deferred_message_data_slot, deferred_message, ++ deferred_message_free_function)) ++ bus_deferred_message_ref(deferred_message); ++ } ++ ++ _dbus_connection_disable_dispatch(deferred_message->sender); ++ deferred_message->response_callback = bus_check_enable_dispatch_callback; ++} ++ ++#ifdef DBUS_ENABLE_EMBEDDED_TESTS ++BusResult (*bus_check_test_override) (DBusConnection *connection, ++ const char *privilege); ++#endif ++ + BusResult + bus_check_privilege (BusCheck *check, + DBusMessage *message, +@@ -124,6 +174,7 @@ bus_check_privilege (BusCheck *check, + BusDeferredMessageStatus check_type, + BusDeferredMessage **deferred_message) + { ++ BusDeferredMessage *previous_deferred_message; + BusResult result = BUS_RESULT_FALSE; + #ifdef DBUS_ENABLE_CYNARA + BusCynara *cynara; +@@ -137,16 +188,54 @@ bus_check_privilege (BusCheck *check, + return BUS_RESULT_FALSE; + } + +- /* ask policy checkers */ +-#ifdef DBUS_ENABLE_CYNARA +- cynara = bus_check_get_cynara(check); +- result = bus_cynara_check_privilege(cynara, message, sender, addressed_recipient, +- proposed_recipient, privilege, check_type, deferred_message); ++#ifdef DBUS_ENABLE_EMBEDDED_TESTS ++ if (bus_check_test_override) ++ return bus_check_test_override (connection, privilege); + #endif + +- if (result == BUS_RESULT_LATER && deferred_message != NULL) ++ previous_deferred_message = dbus_message_get_data(message, deferred_message_data_slot); ++ /* check if message blocked at sender's queue is being processed */ ++ if (previous_deferred_message != NULL) ++ { ++ if ((check_type & BUS_DEFERRED_MESSAGE_CHECK_SEND) && ++ !(previous_deferred_message->status & BUS_DEFERRED_MESSAGE_CHECK_SEND)) ++ { ++ /** ++ * Message has been deferred due to receive or own rule which means that sending this message ++ * is allowed - it must have been checked previously. ++ * This might happen when client calls RequestName method which depending on security ++ * policy might result in both "can_send" and "can_own" Cynara checks. ++ */ ++ result = BUS_RESULT_TRUE; ++ } ++ else ++ { ++ result = previous_deferred_message->response; ++ if (result == BUS_RESULT_LATER) ++ { ++ /* result is still not known - reuse deferred message object */ ++ if (deferred_message != NULL) ++ *deferred_message = previous_deferred_message; ++ } ++ else ++ { ++ /* result is available - we can remove deferred message from the processed message */ ++ dbus_message_set_data(message, deferred_message_data_slot, NULL, NULL); ++ } ++ } ++ } ++ else + { +- (*deferred_message)->status |= check_type; ++ /* ask policy checkers */ ++#ifdef DBUS_ENABLE_CYNARA ++ cynara = bus_check_get_cynara(check); ++ result = bus_cynara_check_privilege(cynara, message, sender, addressed_recipient, ++ proposed_recipient, privilege, check_type, deferred_message); ++#endif ++ if (result == BUS_RESULT_LATER && deferred_message != NULL) ++ { ++ (*deferred_message)->status |= check_type; ++ } + } + return result; + } +@@ -206,6 +295,12 @@ bus_deferred_message_unref (BusDeferredMessage *deferred_message) + } + } + ++BusDeferredMessageStatus ++bus_deferred_message_get_status (BusDeferredMessage *deferred_message) ++{ ++ return deferred_message->status; ++} ++ + void + bus_deferred_message_response_received (BusDeferredMessage *deferred_message, + BusResult result) +diff --git a/bus/check.h b/bus/check.h +index c3fcaf9..d177549 100644 +--- a/bus/check.h ++++ b/bus/check.h +@@ -55,6 +55,7 @@ BusResult bus_check_privilege (BusCheck *check, + BusDeferredMessageStatus check_type, + BusDeferredMessage **deferred_message); + ++ + BusDeferredMessage *bus_deferred_message_new (DBusMessage *message, + DBusConnection *sender, + DBusConnection *addressed_recipient, +@@ -65,4 +66,13 @@ BusDeferredMessage *bus_deferred_message_ref (BusDeferredMessage + void bus_deferred_message_unref (BusDeferredMessage *deferred_message); + void bus_deferred_message_response_received (BusDeferredMessage *deferred_message, + BusResult result); ++void bus_deferred_message_disable_sender (BusDeferredMessage *deferred_message); ++ ++BusDeferredMessageStatus bus_deferred_message_get_status (BusDeferredMessage *deferred_message); ++ ++#ifdef DBUS_ENABLE_EMBEDDED_TESTS ++extern BusResult (*bus_check_test_override) (DBusConnection *connection, ++ const char *privilege); ++#endif ++ + #endif /* BUS_CHECK_H */ +diff --git a/bus/cynara.c b/bus/cynara.c +index 57a4c45..77aed62 100644 +--- a/bus/cynara.c ++++ b/bus/cynara.c +@@ -36,7 +36,6 @@ + #include <cynara-client-async.h> + #endif + +- + #ifdef DBUS_ENABLE_CYNARA + typedef struct BusCynara + { +diff --git a/bus/dispatch.c b/bus/dispatch.c +index d3867f7..50a22a3 100644 +--- a/bus/dispatch.c ++++ b/bus/dispatch.c +@@ -35,6 +35,7 @@ + #include "signals.h" + #include "test.h" + #include <dbus/dbus-internals.h> ++#include <dbus/dbus-connection-internal.h> + #include <dbus/dbus-misc.h> + #include <string.h> + +@@ -122,7 +123,7 @@ send_one_message (DBusConnection *connection, + return TRUE; + } + +-dbus_bool_t ++BusResult + bus_dispatch_matches (BusTransaction *transaction, + DBusConnection *sender, + DBusConnection *addressed_recipient, +@@ -158,13 +159,29 @@ bus_dispatch_matches (BusTransaction *transaction, + message, NULL, error, + &deferred_message); + if (res == BUS_RESULT_FALSE) +- return FALSE; ++ return BUS_RESULT_FALSE; + else if (res == BUS_RESULT_LATER) + { +- dbus_set_error (error, +- DBUS_ERROR_ACCESS_DENIED, +- "Rejecting message because time is needed to check security policy"); +- return FALSE; ++ BusDeferredMessageStatus status; ++ status = bus_deferred_message_get_status(deferred_message); ++ ++ if (status & BUS_DEFERRED_MESSAGE_CHECK_SEND) ++ { ++ /* send rule result not available - disable dispatching messages from the sender */ ++ bus_deferred_message_disable_sender(deferred_message); ++ return BUS_RESULT_LATER; ++ } ++ else if (status & BUS_DEFERRED_MESSAGE_CHECK_RECEIVE) ++ { ++ dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED, ++ "Rejecting message because time is needed to check security policy"); ++ return BUS_RESULT_FALSE; ++ } ++ else ++ { ++ _dbus_verbose("deferred message has no status field set to send or receive unexpectedly\n"); ++ return BUS_RESULT_FALSE; ++ } + } + + if (dbus_message_contains_unix_fds (message) && +@@ -175,14 +192,14 @@ bus_dispatch_matches (BusTransaction *transaction, + DBUS_ERROR_NOT_SUPPORTED, + "Tried to send message with Unix file descriptors" + "to a client that doesn't support that."); +- return FALSE; +- } ++ return BUS_RESULT_FALSE; ++ } + + /* Dispatch the message */ + if (!bus_transaction_send (transaction, addressed_recipient, message)) + { + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + } + +@@ -197,7 +214,7 @@ bus_dispatch_matches (BusTransaction *transaction, + &recipients)) + { + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + link = _dbus_list_get_first_link (&recipients); +@@ -219,10 +236,10 @@ bus_dispatch_matches (BusTransaction *transaction, + if (dbus_error_is_set (&tmp_error)) + { + dbus_move_error (&tmp_error, error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + else +- return TRUE; ++ return BUS_RESULT_TRUE; + } + + static DBusHandlerResult +@@ -409,10 +426,12 @@ bus_dispatch (DBusConnection *connection, + } + else if (res == BUS_RESULT_LATER) + { +- dbus_set_error (&error, +- DBUS_ERROR_ACCESS_DENIED, +- "Rejecting message because time is needed to check security policy"); +- _dbus_verbose ("Security policy needs time to check policy. Dropping message\n"); ++ /* Disable dispatching messages from the sender, ++ * roll back and dispatch the message once the policy result is available */ ++ bus_deferred_message_disable_sender(deferred_message); ++ bus_transaction_cancel_and_free (transaction); ++ transaction = NULL; ++ result = DBUS_HANDLER_RESULT_LATER; + goto out; + } + +@@ -514,8 +533,14 @@ bus_dispatch (DBusConnection *connection, + * addressed_recipient == NULL), and match it against other connections' + * match rules. + */ +- if (!bus_dispatch_matches (transaction, connection, addressed_recipient, message, &error)) +- goto out; ++ if (BUS_RESULT_LATER == bus_dispatch_matches (transaction, connection, addressed_recipient, ++ message, &error)) ++ { ++ /* Roll back and dispatch the message once the policy result is available */ ++ bus_transaction_cancel_and_free (transaction); ++ transaction = NULL; ++ result = DBUS_HANDLER_RESULT_LATER; ++ } + + out: + if (dbus_error_is_set (&error)) +@@ -5060,9 +5085,132 @@ bus_dispatch_test_conf_fail (const DBusString *test_data_dir, + } + #endif + ++typedef struct { ++ DBusTimeout *timeout; ++ DBusConnection *connection; ++ dbus_bool_t timedout; ++ int check_counter; ++} BusTestCheckData; ++ ++static BusTestCheckData *cdata; ++ ++static dbus_bool_t ++bus_dispatch_test_check_timeout (void *data) ++{ ++ _dbus_verbose ("timeout triggered - pretend that privilege check result is available\n"); ++ ++ /* should only happen once during the test */ ++ _dbus_assert (!cdata->timedout); ++ cdata->timedout = TRUE; ++ _dbus_connection_enable_dispatch (cdata->connection); ++ ++ /* don't call this again */ ++ _dbus_loop_remove_timeout (bus_connection_get_loop (cdata->connection), ++ cdata->timeout); ++ dbus_connection_unref (cdata->connection); ++ cdata->connection = NULL; ++ return TRUE; ++} ++ ++static BusResult ++bus_dispatch_test_check_override (DBusConnection *connection, ++ const char *privilege) ++{ ++ _dbus_verbose ("overriding privilege check %s #%d\n", privilege, cdata->check_counter); ++ cdata->check_counter++; ++ if (!cdata->timedout) ++ { ++ dbus_bool_t added; ++ ++ /* Should be the first privilege check for the "Echo" method. */ ++ _dbus_assert (cdata->check_counter == 1); ++ cdata->timeout = _dbus_timeout_new (1, bus_dispatch_test_check_timeout, ++ NULL, NULL); ++ _dbus_assert (cdata->timeout); ++ added = _dbus_loop_add_timeout (bus_connection_get_loop (connection), ++ cdata->timeout); ++ _dbus_assert (added); ++ cdata->connection = connection; ++ dbus_connection_ref (connection); ++ _dbus_connection_disable_dispatch (connection); ++ return BUS_RESULT_LATER; ++ } ++ else ++ { ++ /* Should only be checked one more time, and this time succeeds. */ ++ _dbus_assert (cdata->check_counter == 2); ++ return BUS_RESULT_TRUE; ++ } ++} ++ ++static dbus_bool_t ++bus_dispatch_test_check (const DBusString *test_data_dir) ++{ ++ const char *filename = "valid-config-files/debug-check-some.conf"; ++ BusContext *context; ++ DBusConnection *foo; ++ DBusError error; ++ dbus_bool_t result = TRUE; ++ BusTestCheckData data; ++ ++ /* save the config name for the activation helper */ ++ if (!setenv_TEST_LAUNCH_HELPER_CONFIG (test_data_dir, filename)) ++ _dbus_assert_not_reached ("no memory setting TEST_LAUNCH_HELPER_CONFIG"); ++ ++ dbus_error_init (&error); ++ ++ context = bus_context_new_test (test_data_dir, filename); ++ if (context == NULL) ++ return FALSE; ++ ++ foo = dbus_connection_open_private (TEST_DEBUG_PIPE, &error); ++ if (foo == NULL) ++ _dbus_assert_not_reached ("could not alloc connection"); ++ ++ if (!bus_setup_debug_client (foo)) ++ _dbus_assert_not_reached ("could not set up connection"); ++ ++ spin_connection_until_authenticated (context, foo); ++ ++ if (!check_hello_message (context, foo)) ++ _dbus_assert_not_reached ("hello message failed"); ++ ++ if (!check_double_hello_message (context, foo)) ++ _dbus_assert_not_reached ("double hello message failed"); ++ ++ if (!check_add_match (context, foo, "")) ++ _dbus_assert_not_reached ("AddMatch message failed"); ++ ++ /* ++ * Cause bus_check_send_privilege() to return BUS_RESULT_LATER in the ++ * first call, then BUS_RESULT_TRUE. ++ */ ++ cdata = &data; ++ memset (cdata, 0, sizeof(*cdata)); ++ bus_check_test_override = bus_dispatch_test_check_override; ++ ++ result = check_existent_service_auto_start (context, foo); ++ ++ _dbus_assert (cdata->check_counter == 2); ++ _dbus_assert (cdata->timedout); ++ _dbus_assert (cdata->timeout); ++ _dbus_assert (!cdata->connection); ++ _dbus_timeout_unref (cdata->timeout); ++ ++ kill_client_connection_unchecked (foo); ++ ++ bus_context_unref (context); ++ ++ return result; ++} ++ + dbus_bool_t + bus_dispatch_test (const DBusString *test_data_dir) + { ++ _dbus_verbose ("<check> tests\n"); ++ if (!bus_dispatch_test_check (test_data_dir)) ++ return FALSE; ++ + /* run normal activation tests */ + _dbus_verbose ("Normal activation tests\n"); + if (!bus_dispatch_test_conf (test_data_dir, +diff --git a/bus/dispatch.h b/bus/dispatch.h +index fb5ba7a..afba6a2 100644 +--- a/bus/dispatch.h ++++ b/bus/dispatch.h +@@ -29,7 +29,7 @@ + + dbus_bool_t bus_dispatch_add_connection (DBusConnection *connection); + void bus_dispatch_remove_connection (DBusConnection *connection); +-dbus_bool_t bus_dispatch_matches (BusTransaction *transaction, ++BusResult bus_dispatch_matches (BusTransaction *transaction, + DBusConnection *sender, + DBusConnection *recipient, + DBusMessage *message, +diff --git a/bus/driver.c b/bus/driver.c +index cd0a714..f414f64 100644 +--- a/bus/driver.c ++++ b/bus/driver.c +@@ -218,6 +218,7 @@ bus_driver_send_service_owner_changed (const char *service_name, + { + DBusMessage *message; + dbus_bool_t retval; ++ BusResult res; + const char *null_service; + + _DBUS_ASSERT_ERROR_IS_CLEAR (error); +@@ -253,7 +254,16 @@ bus_driver_send_service_owner_changed (const char *service_name, + if (!bus_transaction_capture (transaction, NULL, NULL, message)) + goto oom; + +- retval = bus_dispatch_matches (transaction, NULL, NULL, message, error); ++ res = bus_dispatch_matches (transaction, NULL, NULL, message, error); ++ if (res == BUS_RESULT_TRUE) ++ retval = TRUE; ++ else ++ { ++ retval = FALSE; ++ if (res == BUS_RESULT_LATER) ++ /* should never happen */ ++ _dbus_assert_not_reached ("bus_dispatch_matches returned BUS_RESULT_LATER unexpectedly"); ++ } + dbus_message_unref (message); + + return retval; +diff --git a/dbus/dbus-connection-internal.h b/dbus/dbus-connection-internal.h +index 4835732..94b1c95 100644 +--- a/dbus/dbus-connection-internal.h ++++ b/dbus/dbus-connection-internal.h +@@ -118,6 +118,21 @@ DBUS_PRIVATE_EXPORT + dbus_bool_t _dbus_connection_get_linux_security_label (DBusConnection *connection, + char **label_p); + ++DBUS_PRIVATE_EXPORT ++void _dbus_connection_enable_dispatch (DBusConnection *connection); ++DBUS_PRIVATE_EXPORT ++void _dbus_connection_disable_dispatch (DBusConnection *connection); ++ ++DBUS_PRIVATE_EXPORT ++dbus_bool_t _dbus_connection_putback_message (DBusConnection *connection, ++ DBusMessage *after_message, ++ DBusMessage *message, ++ DBusError *error); ++ ++DBUS_PRIVATE_EXPORT ++dbus_bool_t _dbus_connection_remove_message (DBusConnection *connection, ++ DBusMessage *message); ++ + /* if DBUS_ENABLE_STATS */ + DBUS_PRIVATE_EXPORT + void _dbus_connection_get_stats (DBusConnection *connection, +diff --git a/dbus/dbus-connection.c b/dbus/dbus-connection.c +index c525b6d..958968c 100644 +--- a/dbus/dbus-connection.c ++++ b/dbus/dbus-connection.c +@@ -311,7 +311,8 @@ struct DBusConnection + */ + dbus_bool_t dispatch_acquired; /**< Someone has dispatch path (can drain incoming queue) */ + dbus_bool_t io_path_acquired; /**< Someone has transport io path (can use the transport to read/write messages) */ +- ++ ++ unsigned int dispatch_disabled : 1; /**< if true, then dispatching incoming messages is stopped until enabled again */ + unsigned int shareable : 1; /**< #TRUE if libdbus owns a reference to the connection and can return it from dbus_connection_open() more than once */ + + unsigned int exit_on_disconnect : 1; /**< If #TRUE, exit after handling disconnect signal */ +@@ -439,6 +440,39 @@ _dbus_connection_wakeup_mainloop (DBusConnection *connection) + (*connection->wakeup_main_function) (connection->wakeup_main_data); + } + ++static void ++_dbus_connection_set_dispatch(DBusConnection *connection, ++ dbus_bool_t disabled) ++{ ++ CONNECTION_LOCK (connection); ++ if (connection->dispatch_disabled != disabled) ++ { ++ DBusDispatchStatus status; ++ ++ connection->dispatch_disabled = disabled; ++ status = _dbus_connection_get_dispatch_status_unlocked (connection); ++ _dbus_connection_update_dispatch_status_and_unlock (connection, status); ++ } ++ else ++ { ++ CONNECTION_UNLOCK (connection); ++ } ++} ++ ++ ++void ++_dbus_connection_enable_dispatch (DBusConnection *connection) ++{ ++ _dbus_connection_set_dispatch (connection, FALSE); ++} ++ ++void ++ _dbus_connection_disable_dispatch (DBusConnection *connection) ++{ ++ _dbus_connection_set_dispatch (connection, TRUE); ++} ++ ++ + #ifdef DBUS_ENABLE_EMBEDDED_TESTS + /** + * Gets the locks so we can examine them +@@ -4069,6 +4103,82 @@ _dbus_connection_putback_message_link_unlocked (DBusConnection *connection, + "_dbus_connection_putback_message_link_unlocked"); + } + ++dbus_bool_t ++_dbus_connection_putback_message (DBusConnection *connection, ++ DBusMessage *after_message, ++ DBusMessage *message, ++ DBusError *error) ++{ ++ DBusDispatchStatus status; ++ DBusList *message_link = _dbus_list_alloc_link (message); ++ DBusList *after_link; ++ if (message_link == NULL) ++ { ++ _DBUS_SET_OOM (error); ++ return FALSE; ++ } ++ dbus_message_ref (message); ++ ++ CONNECTION_LOCK (connection); ++ _dbus_connection_acquire_dispatch (connection); ++ HAVE_LOCK_CHECK (connection); ++ ++ after_link = _dbus_list_find_first(&connection->incoming_messages, after_message); ++ _dbus_list_insert_after_link (&connection->incoming_messages, after_link, message_link); ++ connection->n_incoming += 1; ++ ++ _dbus_verbose ("Message %p (%s %s %s '%s') put back into queue %p, %d incoming\n", ++ message_link->data, ++ dbus_message_type_to_string (dbus_message_get_type (message_link->data)), ++ dbus_message_get_interface (message_link->data) ? ++ dbus_message_get_interface (message_link->data) : ++ "no interface", ++ dbus_message_get_member (message_link->data) ? ++ dbus_message_get_member (message_link->data) : ++ "no member", ++ dbus_message_get_signature (message_link->data), ++ connection, connection->n_incoming); ++ ++ _dbus_message_trace_ref (message_link->data, -1, -1, ++ "_dbus_connection_putback_message"); ++ ++ _dbus_connection_release_dispatch (connection); ++ ++ status = _dbus_connection_get_dispatch_status_unlocked (connection); ++ _dbus_connection_update_dispatch_status_and_unlock (connection, status); ++ ++ return TRUE; ++} ++ ++dbus_bool_t ++_dbus_connection_remove_message (DBusConnection *connection, ++ DBusMessage *message) ++{ ++ DBusDispatchStatus status; ++ dbus_bool_t removed; ++ ++ CONNECTION_LOCK (connection); ++ _dbus_connection_acquire_dispatch (connection); ++ HAVE_LOCK_CHECK (connection); ++ ++ removed = _dbus_list_remove(&connection->incoming_messages, message); ++ ++ if (removed) ++ { ++ connection->n_incoming -= 1; ++ dbus_message_unref(message); ++ _dbus_verbose ("Message %p removed from incoming queue\n", message); ++ } ++ else ++ _dbus_verbose ("Message %p not found in the incoming queue\n", message); ++ ++ _dbus_connection_release_dispatch (connection); ++ ++ status = _dbus_connection_get_dispatch_status_unlocked (connection); ++ _dbus_connection_update_dispatch_status_and_unlock (connection, status); ++ return removed; ++} ++ + /** + * Returns the first-received message from the incoming message queue, + * removing it from the queue. The caller owns a reference to the +@@ -4252,8 +4362,9 @@ static DBusDispatchStatus + _dbus_connection_get_dispatch_status_unlocked (DBusConnection *connection) + { + HAVE_LOCK_CHECK (connection); +- +- if (connection->n_incoming > 0) ++ if (connection->dispatch_disabled && _dbus_connection_get_is_connected_unlocked(connection)) ++ return DBUS_DISPATCH_COMPLETE; ++ else if (connection->n_incoming > 0) + return DBUS_DISPATCH_DATA_REMAINS; + else if (!_dbus_transport_queue_messages (connection->transport)) + return DBUS_DISPATCH_NEED_MEMORY; +@@ -4716,6 +4827,8 @@ dbus_connection_dispatch (DBusConnection *connection) + + CONNECTION_LOCK (connection); + ++ if (result == DBUS_HANDLER_RESULT_LATER) ++ goto out; + if (result == DBUS_HANDLER_RESULT_NEED_MEMORY) + { + _dbus_verbose ("No memory\n"); +@@ -4838,9 +4951,11 @@ dbus_connection_dispatch (DBusConnection *connection) + connection); + + out: +- if (result == DBUS_HANDLER_RESULT_NEED_MEMORY) ++ if (result == DBUS_HANDLER_RESULT_LATER || ++ result == DBUS_HANDLER_RESULT_NEED_MEMORY) + { +- _dbus_verbose ("out of memory\n"); ++ if (result == DBUS_HANDLER_RESULT_NEED_MEMORY) ++ _dbus_verbose ("out of memory\n"); + + /* Put message back, and we'll start over. + * Yes this means handlers must be idempotent if they +diff --git a/dbus/dbus-list.c b/dbus/dbus-list.c +index 8e713c0..32ea871 100644 +--- a/dbus/dbus-list.c ++++ b/dbus/dbus-list.c +@@ -458,6 +458,35 @@ _dbus_list_remove_last (DBusList **list, + return FALSE; + } + ++/** ++ * Finds a value in the list. Returns the first link ++ * with value equal to the given data pointer. ++ * This is a linear-time operation. ++ * Returns #NULL if no value found that matches. ++ * ++ * @param list address of the list head. ++ * @param data the value to find. ++ * @returns the link if found ++ */ ++DBusList* ++_dbus_list_find_first (DBusList **list, ++ void *data) ++{ ++ DBusList *link; ++ ++ link = _dbus_list_get_first_link (list); ++ ++ while (link != NULL) ++ { ++ if (link->data == data) ++ return link; ++ ++ link = _dbus_list_get_next_link (list, link); ++ } ++ ++ return NULL; ++} ++ + /** + * Finds a value in the list. Returns the last link + * with value equal to the given data pointer. +diff --git a/dbus/dbus-list.h b/dbus/dbus-list.h +index 9350a0d..fee9f1b 100644 +--- a/dbus/dbus-list.h ++++ b/dbus/dbus-list.h +@@ -68,6 +68,9 @@ DBUS_PRIVATE_EXPORT + void _dbus_list_remove_link (DBusList **list, + DBusList *link); + DBUS_PRIVATE_EXPORT ++DBusList* _dbus_list_find_first (DBusList **list, ++ void *data); ++DBUS_PRIVATE_EXPORT + DBusList* _dbus_list_find_last (DBusList **list, + void *data); + DBUS_PRIVATE_EXPORT +diff --git a/dbus/dbus-shared.h b/dbus/dbus-shared.h +index 7ab9103..e5bfbed 100644 +--- a/dbus/dbus-shared.h ++++ b/dbus/dbus-shared.h +@@ -67,7 +67,8 @@ typedef enum + { + DBUS_HANDLER_RESULT_HANDLED, /**< Message has had its effect - no need to run more handlers. */ + DBUS_HANDLER_RESULT_NOT_YET_HANDLED, /**< Message has not had any effect - see if other handlers want it. */ +- DBUS_HANDLER_RESULT_NEED_MEMORY /**< Need more memory in order to return #DBUS_HANDLER_RESULT_HANDLED or #DBUS_HANDLER_RESULT_NOT_YET_HANDLED. Please try again later with more memory. */ ++ DBUS_HANDLER_RESULT_NEED_MEMORY, /**< Need more memory in order to return #DBUS_HANDLER_RESULT_HANDLED or #DBUS_HANDLER_RESULT_NOT_YET_HANDLED. Please try again later with more memory. */ ++ DBUS_HANDLER_RESULT_LATER /**< Message dispatch deferred due to pending policy check */ + } DBusHandlerResult; + + /* Bus names */ +-- +2.21.1 + diff --git a/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0003-Handle-unavailability-of-policy-results-for-broadcas.patch b/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0003-Handle-unavailability-of-policy-results-for-broadcas.patch new file mode 100644 index 000000000..7d89a7496 --- /dev/null +++ b/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0003-Handle-unavailability-of-policy-results-for-broadcas.patch @@ -0,0 +1,1095 @@ +From 9d39aa9dd55680529d721a0389ce9ef579bb669a Mon Sep 17 00:00:00 2001 +From: Jacek Bukarewicz <j.bukarewicz@samsung.com> +Date: Fri, 28 Nov 2014 12:39:33 +0100 +Subject: [PATCH 3/8] Handle unavailability of policy results for broadcasts + and receive rules +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +When message is sent to the addressed recipient and receive rule +result is unavailable we don't want to block the sender +as it most likely will be the privileged service, so instead we queue +it at the recipient. Any further messages sent to it will be queued to +maintain message order. Once the answer from Cynara arrives messages are +dispatched from the recipient queue. In such case full dispatch is +performed - messages are sent to addressed recipient and other +interested connections. +Messages sent to non-addressed recipients (eavesdroppers or broadcast +message recipients) are handled in a similar way. The difference is +that it is not full dispatch meaning message is sent to a single recipient. + +Cherry picked from 1e231194610892dd4360224998d91336097b05a1 by Jose Bollo + +Updated for dbus 1.10.20 by Scott Murray and José Bollo + +Signed-off-by: José Bollo <jose.bollo@iot.bzh> +Signed-off-by: Scott Murray <scott.murray@konsulko.com> +--- + bus/activation.c | 4 +- + bus/bus.c | 50 ++++++-- + bus/bus.h | 19 +++ + bus/check.c | 307 +++++++++++++++++++++++++++++++++++++++++++++++ + bus/check.h | 25 ++++ + bus/connection.c | 168 ++++++++++++++++++++++++-- + bus/connection.h | 19 ++- + bus/dispatch.c | 115 +++++++++++++++--- + bus/dispatch.h | 11 +- + bus/driver.c | 2 +- + bus/policy.c | 6 + + 11 files changed, 683 insertions(+), 43 deletions(-) + +diff --git a/bus/activation.c b/bus/activation.c +index 8301b59..d4b597c 100644 +--- a/bus/activation.c ++++ b/bus/activation.c +@@ -1259,7 +1259,7 @@ bus_activation_send_pending_auto_activation_messages (BusActivation *activation + res = bus_dispatch_matches (transaction, + entry->connection, + addressed_recipient, +- entry->activation_message, &error); ++ entry->activation_message, NULL, &error); + if (res == BUS_RESULT_FALSE) + { + /* If permission is denied, we just want to return the error +@@ -2140,7 +2140,7 @@ bus_activation_activate_service (BusActivation *activation, + bus_connection_get_loginfo (connection)); + /* Wonderful, systemd is connected, let's just send the msg */ + res = bus_dispatch_matches (activation_transaction, NULL, +- systemd, message, error); ++ systemd, message, NULL, error); + + if (res == BUS_RESULT_TRUE) + retval = TRUE; +diff --git a/bus/bus.c b/bus/bus.c +index 6fc45d0..0aa700b 100644 +--- a/bus/bus.c ++++ b/bus/bus.c +@@ -1800,17 +1800,9 @@ bus_context_check_security_policy (BusContext *context, + } + + /* See if limits on size have been exceeded */ +- if (proposed_recipient && +- ((dbus_connection_get_outgoing_size (proposed_recipient) > context->limits.max_outgoing_bytes) || +- (dbus_connection_get_outgoing_unix_fds (proposed_recipient) > context->limits.max_outgoing_unix_fds))) +- { +- complain_about_message (context, DBUS_ERROR_LIMITS_EXCEEDED, +- "Rejected: destination has a full message queue", +- 0, message, sender, proposed_recipient, requested_reply, TRUE, NULL, +- error); +- _dbus_verbose ("security policy disallowing message due to full message queue\n"); ++ if (!bus_context_check_recipient_message_limits(context, proposed_recipient, sender, message, ++ requested_reply, error)) + return BUS_RESULT_FALSE; +- } + + /* Record that we will allow a reply here in the future (don't + * bother if the recipient is the bus or this is an eavesdropping +@@ -1869,3 +1861,41 @@ bus_context_check_all_watches (BusContext *context) + _dbus_server_toggle_all_watches (server, enabled); + } + } ++ ++void ++bus_context_complain_about_message (BusContext *context, ++ const char *error_name, ++ const char *complaint, ++ int matched_rules, ++ DBusMessage *message, ++ DBusConnection *sender, ++ DBusConnection *proposed_recipient, ++ dbus_bool_t requested_reply, ++ dbus_bool_t log, ++ const char *privilege, ++ DBusError *error) ++{ ++ complain_about_message(context, error_name, complaint, matched_rules, message, sender, ++ proposed_recipient, requested_reply, log, privilege, error); ++} ++ ++dbus_bool_t bus_context_check_recipient_message_limits (BusContext *context, ++ DBusConnection *recipient, ++ DBusConnection *sender, ++ DBusMessage *message, ++ dbus_bool_t requested_reply, ++ DBusError *error) ++{ ++ if (recipient && ++ ((dbus_connection_get_outgoing_size (recipient) > context->limits.max_outgoing_bytes) || ++ (dbus_connection_get_outgoing_unix_fds (recipient) > context->limits.max_outgoing_unix_fds))) ++ { ++ complain_about_message (context, DBUS_ERROR_LIMITS_EXCEEDED, ++ "Rejected: destination has a full message queue", ++ 0, message, sender, recipient, requested_reply, TRUE, NULL, ++ error); ++ _dbus_verbose ("security policy disallowing message due to full message queue\n"); ++ return FALSE; ++ } ++ return TRUE; ++} +diff --git a/bus/bus.h b/bus/bus.h +index 82c32c8..1b08f7c 100644 +--- a/bus/bus.h ++++ b/bus/bus.h +@@ -164,4 +164,23 @@ BusResult bus_context_check_security_policy (BusContext + BusDeferredMessage **deferred_message); + void bus_context_check_all_watches (BusContext *context); + ++dbus_bool_t bus_context_check_recipient_message_limits (BusContext *context, ++ DBusConnection *recipient, ++ DBusConnection *sender, ++ DBusMessage *message, ++ dbus_bool_t requested_reply, ++ DBusError *error); ++void bus_context_complain_about_message (BusContext *context, ++ const char *error_name, ++ const char *complaint, ++ int matched_rules, ++ DBusMessage *message, ++ DBusConnection *sender, ++ DBusConnection *proposed_recipient, ++ dbus_bool_t requested_reply, ++ dbus_bool_t log, ++ const char *privilege, ++ DBusError *error); ++ ++ + #endif /* BUS_BUS_H */ +diff --git a/bus/check.c b/bus/check.c +index 4b8a699..f3d283f 100644 +--- a/bus/check.c ++++ b/bus/check.c +@@ -49,6 +49,9 @@ typedef struct BusDeferredMessage + DBusConnection *sender; + DBusConnection *proposed_recipient; + DBusConnection *addressed_recipient; ++ dbus_bool_t requested_reply; ++ int matched_rules; ++ const char *privilege; + dbus_bool_t full_dispatch; + BusDeferredMessageStatus status; + BusResult response; +@@ -135,6 +138,89 @@ bus_check_enable_dispatch_callback (BusDeferredMessage *deferred_message, + _dbus_connection_enable_dispatch(deferred_message->sender); + } + ++static void ++bus_check_queued_message_reply_callback (BusDeferredMessage *deferred_message, ++ BusResult result) ++{ ++ int status; ++ ++ _dbus_verbose("bus_check_queued_message_reply_callback called message=%p\n", deferred_message); ++ ++ if (!bus_connection_is_active(deferred_message->proposed_recipient)) ++ return; ++ ++ status = deferred_message->status; ++ ++ deferred_message->status = 0; /* mark message as not waiting for response */ ++ deferred_message->response = result; ++ ++ /* ++ * If send rule allows us to send message we still need to check receive rules. ++ */ ++ if ((status & BUS_DEFERRED_MESSAGE_CHECK_SEND) && (result == BUS_RESULT_TRUE)) ++ { ++ int toggles; ++ BusContext *context; ++ BusRegistry *registry; ++ BusClientPolicy *recipient_policy; ++ BusDeferredMessage *deferred_message_receive; ++ ++ context = bus_connection_get_context(deferred_message->proposed_recipient); ++ registry = bus_context_get_registry(context); ++ recipient_policy = bus_connection_get_policy(deferred_message->proposed_recipient); ++ ++ deferred_message->response = bus_client_policy_check_can_receive(recipient_policy, registry, ++ deferred_message->requested_reply, deferred_message->sender, ++ deferred_message->addressed_recipient, deferred_message->proposed_recipient, deferred_message->message, ++ &toggles, NULL, &deferred_message_receive); ++ if (deferred_message->response == BUS_RESULT_LATER) ++ { ++ /* replace deferred message associated with send check with the one associated with ++ * receive check */ ++ if (!bus_deferred_message_replace(deferred_message, deferred_message_receive)) ++ { ++ /* failed to replace deferred message (due to oom). Set it to rejected */ ++ deferred_message->response = BUS_RESULT_FALSE; ++ } ++ } ++ } ++ ++ bus_connection_dispatch_deferred(deferred_message->proposed_recipient); ++} ++ ++static void ++queue_deferred_message_cancel_transaction_hook (void *data) ++{ ++ BusDeferredMessage *deferred_message = (BusDeferredMessage *)data; ++ bus_connection_remove_deferred_message(deferred_message->proposed_recipient, deferred_message); ++} ++ ++ ++dbus_bool_t ++bus_deferred_message_queue_at_recipient (BusDeferredMessage *deferred_message, ++ BusTransaction *transaction, ++ dbus_bool_t full_dispatch, ++ dbus_bool_t prepend) ++{ ++ _dbus_assert(deferred_message != NULL); ++ _dbus_assert(deferred_message->proposed_recipient != NULL); ++ ++ if (!bus_connection_queue_deferred_message(deferred_message->proposed_recipient, ++ deferred_message, prepend)) ++ return FALSE; ++ ++ if (!bus_transaction_add_cancel_hook(transaction, queue_deferred_message_cancel_transaction_hook, ++ deferred_message, NULL)) ++ { ++ bus_connection_remove_deferred_message(deferred_message->proposed_recipient, deferred_message); ++ return FALSE; ++ } ++ deferred_message->response_callback = bus_check_queued_message_reply_callback; ++ deferred_message->full_dispatch = full_dispatch; ++ ++ return TRUE; ++} ++ + static void + deferred_message_free_function(void *data) + { +@@ -159,6 +245,20 @@ bus_deferred_message_disable_sender (BusDeferredMessage *deferred_message) + deferred_message->response_callback = bus_check_enable_dispatch_callback; + } + ++void ++bus_deferred_message_set_policy_check_info (BusDeferredMessage *deferred_message, ++ dbus_bool_t requested_reply, ++ int matched_rules, ++ const char *privilege) ++{ ++ _dbus_assert(deferred_message != NULL); ++ ++ deferred_message->requested_reply = requested_reply; ++ deferred_message->matched_rules = matched_rules; ++ deferred_message->privilege = privilege; ++} ++ ++ + #ifdef DBUS_ENABLE_EMBEDDED_TESTS + BusResult (*bus_check_test_override) (DBusConnection *connection, + const char *privilege); +@@ -259,6 +359,9 @@ BusDeferredMessage *bus_deferred_message_new (DBusMessage *message, + deferred_message->addressed_recipient = addressed_recipient != NULL ? dbus_connection_ref(addressed_recipient) : NULL; + deferred_message->proposed_recipient = proposed_recipient != NULL ? dbus_connection_ref(proposed_recipient) : NULL; + deferred_message->message = dbus_message_ref(message); ++ deferred_message->requested_reply = FALSE; ++ deferred_message->matched_rules = 0; ++ deferred_message->privilege = NULL; + deferred_message->response = response; + deferred_message->status = 0; + deferred_message->full_dispatch = FALSE; +@@ -295,12 +398,215 @@ bus_deferred_message_unref (BusDeferredMessage *deferred_message) + } + } + ++dbus_bool_t ++bus_deferred_message_check_message_limits (BusDeferredMessage *deferred_message, DBusError *error) ++{ ++ BusContext *context = bus_connection_get_context(deferred_message->proposed_recipient); ++ ++ return bus_context_check_recipient_message_limits(context, deferred_message->proposed_recipient, ++ deferred_message->sender, deferred_message->message, deferred_message->requested_reply, ++ error); ++} ++ ++dbus_bool_t ++bus_deferred_message_expect_method_reply(BusDeferredMessage *deferred_message, BusTransaction *transaction, DBusError *error) ++{ ++ int type = dbus_message_get_type(deferred_message->message); ++ if (type == DBUS_MESSAGE_TYPE_METHOD_CALL && ++ deferred_message->sender && ++ deferred_message->addressed_recipient && ++ deferred_message->addressed_recipient == deferred_message->proposed_recipient && /* not eavesdropping */ ++ !bus_connections_expect_reply (bus_connection_get_connections (deferred_message->sender), ++ transaction, ++ deferred_message->sender, deferred_message->addressed_recipient, ++ deferred_message->message, error)) ++ { ++ _dbus_verbose ("Failed to record reply expectation or problem with the message expecting a reply\n"); ++ return FALSE; ++ } ++ return TRUE; ++} ++ ++void ++bus_deferred_message_create_error(BusDeferredMessage *deferred_message, ++ const char *error_message, DBusError *error) ++{ ++ BusContext *context; ++ _dbus_assert (deferred_message->status == 0 && deferred_message->response == BUS_RESULT_FALSE); ++ ++ if (deferred_message->sender == NULL) ++ return; /* error won't be sent to bus driver anyway */ ++ ++ context = bus_connection_get_context(deferred_message->sender); ++ bus_context_complain_about_message(context, DBUS_ERROR_ACCESS_DENIED, "Rejected message", ++ deferred_message->matched_rules, deferred_message->message, deferred_message->sender, ++ deferred_message->proposed_recipient, deferred_message->requested_reply, FALSE, ++ deferred_message->privilege, error); ++} ++ ++BusResult ++bus_deferred_message_dispatch (BusDeferredMessage *deferred_message) ++{ ++ BusContext *context = bus_connection_get_context (deferred_message->proposed_recipient); ++ BusTransaction *transaction = bus_transaction_new (context); ++ BusResult result = BUS_RESULT_TRUE; ++ DBusError error; ++ ++ if (transaction == NULL) ++ { ++ return BUS_RESULT_FALSE; ++ } ++ ++ dbus_error_init(&error); ++ ++ if (!deferred_message->full_dispatch) ++ { ++ result = deferred_message->response; ++ if (result == BUS_RESULT_TRUE) ++ { ++ if (!bus_context_check_recipient_message_limits(context, deferred_message->proposed_recipient, ++ deferred_message->sender, deferred_message->message, deferred_message->requested_reply, &error)) ++ result = BUS_RESULT_FALSE; ++ } ++ else if (result == BUS_RESULT_LATER) ++ { ++ BusDeferredMessage *deferred_message2; ++ result = bus_context_check_security_policy (context, transaction, ++ deferred_message->sender, ++ deferred_message->addressed_recipient, ++ deferred_message->proposed_recipient, ++ deferred_message->message, NULL, NULL, ++ &deferred_message2); ++ ++ if (result == BUS_RESULT_LATER) ++ { ++ /* prepend at recipient */ ++ if (!bus_deferred_message_queue_at_recipient(deferred_message2, transaction, ++ FALSE, TRUE)) ++ result = BUS_RESULT_FALSE; ++ } ++ } ++ ++ /* silently drop messages on access denial */ ++ if (result == BUS_RESULT_TRUE) ++ { ++ if (!bus_transaction_send (transaction, deferred_message->proposed_recipient, deferred_message->message, TRUE)) ++ result = BUS_RESULT_FALSE; ++ } ++ ++ bus_transaction_execute_and_free(transaction); ++ ++ goto out; ++ } ++ ++ /* do not attempt to send message if sender has disconnected */ ++ if (deferred_message->sender != NULL && !bus_connection_is_active(deferred_message->sender)) ++ { ++ bus_transaction_cancel_and_free(transaction); ++ result = BUS_RESULT_FALSE; ++ goto out; ++ } ++ ++ result = bus_dispatch_matches(transaction, deferred_message->sender, ++ deferred_message->addressed_recipient, deferred_message->message, deferred_message, &error); ++ ++ if (result == BUS_RESULT_LATER) ++ { ++ /* Message deferring was already done in bus_dispatch_matches */ ++ bus_transaction_cancel_and_free(transaction); ++ goto out; ++ } ++ ++ /* this part is a copy & paste from bus_dispatch function. Probably can be moved to a function */ ++ if (dbus_error_is_set (&error)) ++ { ++ if (!dbus_connection_get_is_connected (deferred_message->sender)) ++ { ++ /* If we disconnected it, we won't bother to send it any error ++ * messages. ++ */ ++ _dbus_verbose ("Not sending error to connection we disconnected\n"); ++ } ++ else if (dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY)) ++ { ++ bus_connection_send_oom_error (deferred_message->sender, deferred_message->message); ++ ++ /* cancel transaction due to OOM */ ++ if (transaction != NULL) ++ { ++ bus_transaction_cancel_and_free (transaction); ++ transaction = NULL; ++ } ++ } ++ else ++ { ++ /* Try to send the real error, if no mem to do that, send ++ * the OOM error ++ */ ++ _dbus_assert (transaction != NULL); ++ if (!bus_transaction_send_error_reply (transaction, deferred_message->sender, ++ &error, deferred_message->message)) ++ { ++ bus_connection_send_oom_error (deferred_message->sender, deferred_message->message); ++ ++ /* cancel transaction due to OOM */ ++ if (transaction != NULL) ++ { ++ bus_transaction_cancel_and_free (transaction); ++ transaction = NULL; ++ } ++ } ++ } ++ } ++ ++ if (transaction != NULL) ++ { ++ bus_transaction_execute_and_free (transaction); ++ } ++ ++out: ++ dbus_error_free(&error); ++ ++ return result; ++} ++ ++dbus_bool_t ++bus_deferred_message_replace (BusDeferredMessage *old_message, BusDeferredMessage *new_message) ++{ ++ if (bus_connection_replace_deferred_message(old_message->proposed_recipient, ++ old_message, new_message)) ++ { ++ new_message->response_callback = old_message->response_callback; ++ new_message->full_dispatch = old_message->full_dispatch; ++ return TRUE; ++ } ++ return FALSE; ++} ++ ++dbus_bool_t ++bus_deferred_message_waits_for_check(BusDeferredMessage *deferred_message) ++{ ++ return deferred_message->status != 0; ++} ++ ++DBusConnection * ++bus_deferred_message_get_recipient(BusDeferredMessage *deferred_message) ++{ ++ return deferred_message->proposed_recipient; ++} ++ + BusDeferredMessageStatus + bus_deferred_message_get_status (BusDeferredMessage *deferred_message) + { + return deferred_message->status; + } + ++BusResult ++bus_deferred_message_get_response (BusDeferredMessage *deferred_message) ++{ ++ return deferred_message->response; ++} ++ + void + bus_deferred_message_response_received (BusDeferredMessage *deferred_message, + BusResult result) +@@ -310,3 +616,4 @@ bus_deferred_message_response_received (BusDeferredMessage *deferred_message, + deferred_message->response_callback(deferred_message, result); + } + } ++ +diff --git a/bus/check.h b/bus/check.h +index d177549..9c13c18 100644 +--- a/bus/check.h ++++ b/bus/check.h +@@ -64,12 +64,37 @@ BusDeferredMessage *bus_deferred_message_new (DBusMessage *messag + + BusDeferredMessage *bus_deferred_message_ref (BusDeferredMessage *deferred_message); + void bus_deferred_message_unref (BusDeferredMessage *deferred_message); ++BusResult bus_deferred_message_dispatch (BusDeferredMessage *deferred_message); ++dbus_bool_t bus_deferred_message_waits_for_check (BusDeferredMessage *deferred_message); ++DBusConnection *bus_deferred_message_get_recipient (BusDeferredMessage *deferred_message); + void bus_deferred_message_response_received (BusDeferredMessage *deferred_message, + BusResult result); ++dbus_bool_t bus_deferred_message_queue_at_recipient (BusDeferredMessage *deferred_message, ++ BusTransaction *transaction, ++ dbus_bool_t full_dispatch, ++ dbus_bool_t prepend); ++dbus_bool_t bus_deferred_message_replace (BusDeferredMessage *old_message, ++ BusDeferredMessage *new_message); + void bus_deferred_message_disable_sender (BusDeferredMessage *deferred_message); ++BusResult bus_deferred_message_get_response (BusDeferredMessage *deferred_message); + + BusDeferredMessageStatus bus_deferred_message_get_status (BusDeferredMessage *deferred_message); + ++ ++dbus_bool_t bus_deferred_message_expect_method_reply (BusDeferredMessage *deferred_message, ++ BusTransaction *transaction, ++ DBusError *error); ++void bus_deferred_message_create_error (BusDeferredMessage *deferred_message, ++ const char *error_message, ++ DBusError *error); ++void bus_deferred_message_set_policy_check_info (BusDeferredMessage *deferred_message, ++ dbus_bool_t requested_reply, ++ int matched_rules, ++ const char *privilege); ++dbus_bool_t bus_deferred_message_check_message_limits (BusDeferredMessage *deferred_message, ++ DBusError *error); ++ ++ + #ifdef DBUS_ENABLE_EMBEDDED_TESTS + extern BusResult (*bus_check_test_override) (DBusConnection *connection, + const char *privilege); +diff --git a/bus/connection.c b/bus/connection.c +index b348d42..ee93384 100644 +--- a/bus/connection.c ++++ b/bus/connection.c +@@ -31,11 +31,13 @@ + #include "expirelist.h" + #include "selinux.h" + #include "apparmor.h" ++#include "check.h" + #include <dbus/dbus-list.h> + #include <dbus/dbus-hash.h> + #include <dbus/dbus-timeout.h> + #include <dbus/dbus-connection-internal.h> + #include <dbus/dbus-internals.h> ++#include <dbus/dbus-message-internal.h> + #ifdef DBUS_ENABLE_CYNARA + #include <stdlib.h> + #include <cynara-session.h> +@@ -102,6 +104,7 @@ typedef struct + DBusMessage *oom_message; + DBusPreallocatedSend *oom_preallocated; + BusClientPolicy *policy; ++ DBusList *deferred_messages; /**< Queue of messages deferred due to pending policy check */ + + char *cached_loginfo_string; + BusSELinuxID *selinux_id; +@@ -268,6 +271,8 @@ bus_connection_disconnected (DBusConnection *connection) + bus_transaction_execute_and_free (transaction); + } + ++ bus_connection_clear_deferred_messages(connection); ++ + bus_dispatch_remove_connection (connection); + + /* no more watching */ +@@ -2307,7 +2312,7 @@ bus_transaction_capture (BusTransaction *transaction, + { + DBusConnection *recipient = link->data; + +- if (!bus_transaction_send (transaction, recipient, message)) ++ if (!bus_transaction_send (transaction, recipient, message, FALSE)) + goto out; + } + +@@ -2361,6 +2366,7 @@ bus_transaction_send_from_driver (BusTransaction *transaction, + { + DBusError error = DBUS_ERROR_INIT; + BusResult res; ++ BusDeferredMessage *deferred_message; + + /* We have to set the sender to the driver, and have + * to check security policy since it was not done in +@@ -2401,7 +2407,7 @@ bus_transaction_send_from_driver (BusTransaction *transaction, + res = bus_context_check_security_policy (bus_transaction_get_context (transaction), + transaction, + NULL, connection, connection, message, NULL, +- &error, NULL); ++ &error, &deferred_message); + if (res == BUS_RESULT_FALSE) + { + if (!bus_transaction_capture_error_reply (transaction, connection, +@@ -2419,18 +2425,20 @@ bus_transaction_send_from_driver (BusTransaction *transaction, + } + else if (res == BUS_RESULT_LATER) + { +- _dbus_verbose ("Cannot delay sending message from bus driver, dropping it\n"); + dbus_error_free (&error); +- return TRUE; ++ if (!bus_deferred_message_queue_at_recipient(deferred_message, transaction, FALSE, FALSE)) ++ return FALSE; ++ return TRUE; /* pretend to have sent it */ + } + +- return bus_transaction_send (transaction, connection, message); ++ return bus_transaction_send (transaction, connection, message, FALSE); + } + + dbus_bool_t + bus_transaction_send (BusTransaction *transaction, + DBusConnection *connection, +- DBusMessage *message) ++ DBusMessage *message, ++ dbus_bool_t deferred_dispatch) + { + MessageToSend *to_send; + BusConnectionData *d; +@@ -2456,7 +2464,28 @@ bus_transaction_send (BusTransaction *transaction, + + d = BUS_CONNECTION_DATA (connection); + _dbus_assert (d != NULL); +- ++ ++ if (!deferred_dispatch && d->deferred_messages != NULL) ++ { ++ BusDeferredMessage *deferred_message; ++ dbus_bool_t success; ++ /* sender and addressed recipient are not required at this point as we only need to send message ++ * to a single recipient without performing policy check. */ ++ deferred_message = bus_deferred_message_new (message, ++ NULL, ++ NULL, ++ connection, ++ BUS_RESULT_TRUE); ++ if (deferred_message == NULL) ++ return FALSE; ++ ++ success = bus_deferred_message_queue_at_recipient(deferred_message, transaction, ++ FALSE, FALSE); ++ bus_deferred_message_unref(deferred_message); ++ ++ return success; ++ } ++ + to_send = dbus_new (MessageToSend, 1); + if (to_send == NULL) + { +@@ -2708,6 +2737,131 @@ bus_transaction_add_cancel_hook (BusTransaction *transaction, + return TRUE; + } + ++void ++bus_connection_dispatch_deferred (DBusConnection *connection) ++{ ++ BusDeferredMessage *message; ++ ++ _dbus_return_if_fail (connection != NULL); ++ ++ while ((message = bus_connection_pop_deferred_message(connection)) != NULL) ++ { ++ bus_deferred_message_dispatch(message); ++ bus_deferred_message_unref(message); ++ } ++} ++ ++dbus_bool_t ++bus_connection_has_deferred_messages (DBusConnection *connection) ++{ ++ BusConnectionData *d = BUS_CONNECTION_DATA(connection); ++ return d->deferred_messages != NULL ? TRUE : FALSE; ++} ++ ++dbus_bool_t ++bus_connection_queue_deferred_message (DBusConnection *connection, ++ BusDeferredMessage *message, ++ dbus_bool_t prepend) ++{ ++ BusConnectionData *d = BUS_CONNECTION_DATA(connection); ++ dbus_bool_t success; ++ if (prepend) ++ success = _dbus_list_prepend(&d->deferred_messages, message); ++ else ++ success = _dbus_list_append(&d->deferred_messages, message); ++ ++ if (success) ++ { ++ bus_deferred_message_ref(message); ++ return TRUE; ++ } ++ ++ return FALSE; ++} ++ ++dbus_bool_t ++bus_connection_replace_deferred_message (DBusConnection *connection, ++ BusDeferredMessage *oldMessage, ++ BusDeferredMessage *newMessage) ++{ ++ DBusList *link; ++ BusConnectionData *d = BUS_CONNECTION_DATA(connection); ++ ++ link = _dbus_list_find_first(&d->deferred_messages, oldMessage); ++ if (link == NULL) ++ return FALSE; ++ ++ if (!_dbus_list_insert_after(&d->deferred_messages, link, newMessage)) ++ return FALSE; ++ ++ bus_deferred_message_ref(newMessage); ++ _dbus_list_remove_link(&d->deferred_messages, link); ++ bus_deferred_message_unref(oldMessage); ++ return TRUE; ++} ++ ++BusDeferredMessage * ++bus_connection_pop_deferred_message (DBusConnection *connection) ++{ ++ DBusList *link; ++ BusDeferredMessage *message; ++ BusConnectionData *d = BUS_CONNECTION_DATA(connection); ++ ++ link =_dbus_list_get_first_link(&d->deferred_messages); ++ if (link != NULL) ++ { ++ message = link->data; ++ if (!bus_deferred_message_waits_for_check(message)) ++ { ++ _dbus_list_remove_link(&d->deferred_messages, link); ++ return message; ++ } ++ } ++ ++ return NULL; ++} ++ ++dbus_bool_t ++bus_connection_putback_deferred_message (DBusConnection *connection, BusDeferredMessage *message) ++{ ++ BusConnectionData *d = BUS_CONNECTION_DATA(connection); ++ if (_dbus_list_prepend(&d->deferred_messages, message)) ++ { ++ return TRUE; ++ } ++ return FALSE; ++} ++ ++void ++bus_connection_clear_deferred_messages (DBusConnection *connection) ++{ ++ BusConnectionData *d = BUS_CONNECTION_DATA(connection); ++ DBusList *link; ++ DBusList *next; ++ BusDeferredMessage *message; ++ ++ link =_dbus_list_get_first_link(&d->deferred_messages); ++ while (link != NULL) ++ { ++ next = _dbus_list_get_next_link (&d->deferred_messages, link); ++ message = link->data; ++ ++ bus_deferred_message_unref(message); ++ _dbus_list_remove_link(&d->deferred_messages, link); ++ ++ link = next; ++ } ++} ++ ++void ++bus_connection_remove_deferred_message (DBusConnection *connection, ++ BusDeferredMessage *message) ++{ ++ BusConnectionData *d = BUS_CONNECTION_DATA(connection); ++ if (_dbus_list_remove(&d->deferred_messages, message)) ++ bus_deferred_message_unref(message); ++} ++ + int + bus_connections_get_n_active (BusConnections *connections) + { +diff --git a/bus/connection.h b/bus/connection.h +index 71078ea..97dae96 100644 +--- a/bus/connection.h ++++ b/bus/connection.h +@@ -85,6 +85,22 @@ dbus_bool_t bus_connection_preallocate_oom_error (DBusConnection *connection); + void bus_connection_send_oom_error (DBusConnection *connection, + DBusMessage *in_reply_to); + ++dbus_bool_t bus_connection_has_deferred_messages (DBusConnection *connection); ++dbus_bool_t bus_connection_queue_deferred_message (DBusConnection *connection, ++ BusDeferredMessage *message, ++ dbus_bool_t prepend); ++BusDeferredMessage *bus_connection_pop_deferred_message (DBusConnection *connection); ++dbus_bool_t bus_connection_putback_deferred_message (DBusConnection *connection, ++ BusDeferredMessage *message); ++void bus_connection_remove_deferred_message (DBusConnection *connection, ++ BusDeferredMessage *message); ++dbus_bool_t bus_connection_replace_deferred_message (DBusConnection *connection, ++ BusDeferredMessage *oldMessage, ++ BusDeferredMessage *newMessage); ++void bus_connection_dispatch_deferred (DBusConnection *connection); ++void bus_connection_clear_deferred_messages (DBusConnection *connection); ++ ++ + /* called by signals.c */ + dbus_bool_t bus_connection_add_match_rule (DBusConnection *connection, + BusMatchRule *rule); +@@ -137,7 +153,8 @@ BusTransaction* bus_transaction_new (BusContext * + BusContext* bus_transaction_get_context (BusTransaction *transaction); + dbus_bool_t bus_transaction_send (BusTransaction *transaction, + DBusConnection *connection, +- DBusMessage *message); ++ DBusMessage *message, ++ dbus_bool_t deferred_dispatch); + dbus_bool_t bus_transaction_capture (BusTransaction *transaction, + DBusConnection *connection, + DBusConnection *addressed_recipient, +diff --git a/bus/dispatch.c b/bus/dispatch.c +index 50a22a3..7d30ce4 100644 +--- a/bus/dispatch.c ++++ b/bus/dispatch.c +@@ -33,6 +33,7 @@ + #include "utils.h" + #include "bus.h" + #include "signals.h" ++#include "dispatch.h" + #include "test.h" + #include <dbus/dbus-internals.h> + #include <dbus/dbus-connection-internal.h> +@@ -77,7 +78,7 @@ send_one_message (DBusConnection *connection, + NULL, + &stack_error, + &deferred_message); +- if (result != BUS_RESULT_TRUE) ++ if (result == BUS_RESULT_FALSE) + { + if (!bus_transaction_capture_error_reply (transaction, sender, + &stack_error, message)) +@@ -112,9 +113,19 @@ send_one_message (DBusConnection *connection, + return TRUE; /* don't send it but don't return an error either */ + } + ++ if (result == BUS_RESULT_LATER) ++ { ++ if (!bus_deferred_message_queue_at_recipient(deferred_message, transaction, FALSE, FALSE)) ++ { ++ BUS_SET_OOM (error); ++ return FALSE; ++ } ++ return TRUE; /* pretend to have sent it */ ++ } ++ + if (!bus_transaction_send (transaction, + connection, +- message)) ++ message, FALSE)) + { + BUS_SET_OOM (error); + return FALSE; +@@ -124,11 +135,12 @@ send_one_message (DBusConnection *connection, + } + + BusResult +-bus_dispatch_matches (BusTransaction *transaction, +- DBusConnection *sender, +- DBusConnection *addressed_recipient, +- DBusMessage *message, +- DBusError *error) ++bus_dispatch_matches (BusTransaction *transaction, ++ DBusConnection *sender, ++ DBusConnection *addressed_recipient, ++ DBusMessage *message, ++ BusDeferredMessage *dispatched_deferred_message, ++ DBusError *error) + { + DBusError tmp_error; + BusConnections *connections; +@@ -137,7 +149,6 @@ bus_dispatch_matches (BusTransaction *transaction, + DBusList *link; + BusContext *context; + BusDeferredMessage *deferred_message; +- BusResult res; + + _DBUS_ASSERT_ERROR_IS_CLEAR (error); + +@@ -153,16 +164,80 @@ bus_dispatch_matches (BusTransaction *transaction, + /* First, send the message to the addressed_recipient, if there is one. */ + if (addressed_recipient != NULL) + { +- res = bus_context_check_security_policy (context, transaction, ++ BusResult result; ++ /* To maintain message order message needs to be appended at the recipient if there are already ++ * deferred messages and we are not doing deferred dispatch ++ */ ++ if (dispatched_deferred_message == NULL && bus_connection_has_deferred_messages(addressed_recipient)) ++ { ++ deferred_message = bus_deferred_message_new(message, sender, ++ addressed_recipient, addressed_recipient, BUS_RESULT_LATER); ++ ++ if (deferred_message == NULL) ++ { ++ BUS_SET_OOM(error); ++ return BUS_RESULT_FALSE; ++ } ++ ++ if (!bus_deferred_message_queue_at_recipient(deferred_message, transaction, TRUE, FALSE)) ++ { ++ bus_deferred_message_unref(deferred_message); ++ BUS_SET_OOM(error); ++ return BUS_RESULT_FALSE; ++ } ++ ++ bus_deferred_message_unref(deferred_message); ++ return BUS_RESULT_TRUE; /* pretend to have sent it */ ++ } ++ ++ if (dispatched_deferred_message != NULL) ++ { ++ result = bus_deferred_message_get_response(dispatched_deferred_message); ++ if (result == BUS_RESULT_TRUE) ++ { ++ /* if we know the result of policy check we still need to check if message limits ++ * are not exceeded. It is also required to add entry in expected replies list if ++ * this is a method call ++ */ ++ if (!bus_deferred_message_check_message_limits(dispatched_deferred_message, error)) ++ return BUS_RESULT_FALSE; ++ ++ if (!bus_deferred_message_expect_method_reply(dispatched_deferred_message, transaction, error)) ++ return BUS_RESULT_FALSE; ++ } ++ else if (result == BUS_RESULT_FALSE) ++ { ++ bus_deferred_message_create_error(dispatched_deferred_message, "Rejected message", error); ++ return BUS_RESULT_FALSE; ++ } ++ } ++ else ++ result = BUS_RESULT_LATER; ++ ++ if (result == BUS_RESULT_LATER) ++ result = bus_context_check_security_policy (context, transaction, + sender, addressed_recipient, + addressed_recipient, + message, NULL, error, + &deferred_message); +- if (res == BUS_RESULT_FALSE) ++ ++ if (result == BUS_RESULT_FALSE) + return BUS_RESULT_FALSE; +- else if (res == BUS_RESULT_LATER) ++ else if (result == BUS_RESULT_LATER) + { + BusDeferredMessageStatus status; ++ ++ if (dispatched_deferred_message != NULL) ++ { ++ /* for deferred dispatch prepend message at the recipient */ ++ if (!bus_deferred_message_queue_at_recipient(deferred_message, transaction, TRUE, TRUE)) ++ { ++ BUS_SET_OOM(error); ++ return BUS_RESULT_FALSE; ++ } ++ return BUS_RESULT_TRUE; /* pretend to have sent it */ ++ } ++ + status = bus_deferred_message_get_status(deferred_message); + + if (status & BUS_DEFERRED_MESSAGE_CHECK_SEND) +@@ -173,13 +248,18 @@ bus_dispatch_matches (BusTransaction *transaction, + } + else if (status & BUS_DEFERRED_MESSAGE_CHECK_RECEIVE) + { +- dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED, +- "Rejecting message because time is needed to check security policy"); +- return BUS_RESULT_FALSE; ++ /* receive rule result not available - queue message at the recipient */ ++ if (!bus_deferred_message_queue_at_recipient(deferred_message, transaction, TRUE, FALSE)) ++ { ++ BUS_SET_OOM(error); ++ return BUS_RESULT_FALSE; ++ } ++ ++ return BUS_RESULT_TRUE; /* pretend to have sent it */ + } + else + { +- _dbus_verbose("deferred message has no status field set to send or receive unexpectedly\n"); ++ _dbus_verbose("deferred message has no status field set unexpectedly\n"); + return BUS_RESULT_FALSE; + } + } +@@ -196,7 +276,8 @@ bus_dispatch_matches (BusTransaction *transaction, + } + + /* Dispatch the message */ +- if (!bus_transaction_send (transaction, addressed_recipient, message)) ++ if (!bus_transaction_send(transaction, addressed_recipient, message, ++ dispatched_deferred_message != NULL ? TRUE : FALSE)) + { + BUS_SET_OOM (error); + return BUS_RESULT_FALSE; +@@ -534,7 +615,7 @@ bus_dispatch (DBusConnection *connection, + * match rules. + */ + if (BUS_RESULT_LATER == bus_dispatch_matches (transaction, connection, addressed_recipient, +- message, &error)) ++ message, NULL, &error)) + { + /* Roll back and dispatch the message once the policy result is available */ + bus_transaction_cancel_and_free (transaction); +diff --git a/bus/dispatch.h b/bus/dispatch.h +index afba6a2..f6102e8 100644 +--- a/bus/dispatch.h ++++ b/bus/dispatch.h +@@ -29,10 +29,11 @@ + + dbus_bool_t bus_dispatch_add_connection (DBusConnection *connection); + void bus_dispatch_remove_connection (DBusConnection *connection); +-BusResult bus_dispatch_matches (BusTransaction *transaction, +- DBusConnection *sender, +- DBusConnection *recipient, +- DBusMessage *message, +- DBusError *error); ++BusResult bus_dispatch_matches (BusTransaction *transaction, ++ DBusConnection *sender, ++ DBusConnection *recipient, ++ DBusMessage *message, ++ BusDeferredMessage *dispatched_deferred_message, ++ DBusError *error); + + #endif /* BUS_DISPATCH_H */ +diff --git a/bus/driver.c b/bus/driver.c +index f414f64..d89a658 100644 +--- a/bus/driver.c ++++ b/bus/driver.c +@@ -254,7 +254,7 @@ bus_driver_send_service_owner_changed (const char *service_name, + if (!bus_transaction_capture (transaction, NULL, NULL, message)) + goto oom; + +- res = bus_dispatch_matches (transaction, NULL, NULL, message, error); ++ res = bus_dispatch_matches (transaction, NULL, NULL, message, NULL, error); + if (res == BUS_RESULT_TRUE) + retval = TRUE; + else +diff --git a/bus/policy.c b/bus/policy.c +index 7de92c6..483cc97 100644 +--- a/bus/policy.c ++++ b/bus/policy.c +@@ -1122,6 +1122,9 @@ bus_client_policy_check_can_send (DBusConnection *sender, + + result = bus_check_privilege(check, message, sender, addressed_recipient, receiver, + privilege, BUS_DEFERRED_MESSAGE_CHECK_SEND, deferred_message); ++ if (result == BUS_RESULT_LATER && deferred_message != NULL) ++ bus_deferred_message_set_policy_check_info(*deferred_message, requested_reply, ++ *toggles, privilege); + } + else + privilege = NULL; +@@ -1372,6 +1375,9 @@ bus_client_policy_check_can_receive (BusClientPolicy *policy, + + result = bus_check_privilege(check, message, sender, addressed_recipient, proposed_recipient, + privilege, BUS_DEFERRED_MESSAGE_CHECK_RECEIVE, deferred_message); ++ if (result == BUS_RESULT_LATER && deferred_message != NULL) ++ bus_deferred_message_set_policy_check_info(*deferred_message, requested_reply, ++ *toggles, privilege); + } + else + privilege = NULL; +-- +2.21.1 + diff --git a/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0004-Add-own-rule-result-unavailability-handling.patch b/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0004-Add-own-rule-result-unavailability-handling.patch new file mode 100644 index 000000000..9953dcaac --- /dev/null +++ b/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0004-Add-own-rule-result-unavailability-handling.patch @@ -0,0 +1,1505 @@ +From 28ada62c98d74285dc22b66650b09b6c8f2c28c4 Mon Sep 17 00:00:00 2001 +From: Jacek Bukarewicz <j.bukarewicz@samsung.com> +Date: Thu, 27 Nov 2014 11:26:21 +0100 +Subject: [PATCH 4/8] Add own rule result unavailability handling +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Own rule result unavailability is handled like send rules - dispatching +messages from the sender is blocked and resumed when result becomes +available. + +Handler of "RequestName" method needs to return BUS_RESULT_LATER when +policy result is not known therefore its return type is modified. +Since bus message handlers are put into function pointer array other +message handler function singatures are also affected. + +Cherry-picked from 35ef89cd6777ea2430077fc621d21bd01df92349 by Jose.bollo + +Updated for dbus 1.10.20 by Scott Murray and José Bollo + +Signed-off-by: José Bollo <jose.bollo@iot.bzh> +Signed-off-by: Scott Murray <scott.murray@konsulko.com> +--- + bus/dispatch.c | 11 +- + bus/driver.c | 334 ++++++++++++++++++++++++++++--------------------- + bus/driver.h | 2 +- + bus/policy.c | 52 ++++++-- + bus/policy.h | 6 +- + bus/services.c | 26 ++-- + bus/services.h | 3 +- + bus/stats.c | 23 ++-- + bus/stats.h | 6 +- + 9 files changed, 283 insertions(+), 180 deletions(-) + +diff --git a/bus/dispatch.c b/bus/dispatch.c +index 7d30ce4..4b84c21 100644 +--- a/bus/dispatch.c ++++ b/bus/dispatch.c +@@ -517,8 +517,17 @@ bus_dispatch (DBusConnection *connection, + } + + _dbus_verbose ("Giving message to %s\n", DBUS_SERVICE_DBUS); +- if (!bus_driver_handle_message (connection, transaction, message, &error)) ++ res = bus_driver_handle_message (connection, transaction, message, &error); ++ if (res == BUS_RESULT_FALSE) + goto out; ++ else if (res == BUS_RESULT_LATER) ++ { ++ /* connection has been disabled in message handler */ ++ bus_transaction_cancel_and_free (transaction); ++ transaction = NULL; ++ result = DBUS_HANDLER_RESULT_LATER; ++ goto out; ++ } + } + else if (!bus_connection_is_active (connection)) /* clients must talk to bus driver first */ + { +diff --git a/bus/driver.c b/bus/driver.c +index d89a658..aaeb3b2 100644 +--- a/bus/driver.c ++++ b/bus/driver.c +@@ -420,7 +420,7 @@ create_unique_client_name (BusRegistry *registry, + return TRUE; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_hello (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -428,7 +428,7 @@ bus_driver_handle_hello (DBusConnection *connection, + { + DBusString unique_name; + BusService *service; +- dbus_bool_t retval; ++ BusResult retval; + BusRegistry *registry; + BusConnections *connections; + DBusError tmp_error; +@@ -442,7 +442,7 @@ bus_driver_handle_hello (DBusConnection *connection, + /* We already handled an Hello message for this connection. */ + dbus_set_error (error, DBUS_ERROR_FAILED, + "Already handled an Hello message"); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + /* Note that when these limits are exceeded we don't disconnect the +@@ -464,16 +464,16 @@ bus_driver_handle_hello (DBusConnection *connection, + bus_context_log (context, DBUS_SYSTEM_LOG_WARNING, "%s (%s=%d)", + tmp_error.message, limit_name, limit); + dbus_move_error (&tmp_error, error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + if (!_dbus_string_init (&unique_name)) + { + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + +- retval = FALSE; ++ retval = BUS_RESULT_FALSE; + + registry = bus_connection_get_registry (connection); + +@@ -506,7 +506,7 @@ bus_driver_handle_hello (DBusConnection *connection, + goto out_0; + + _dbus_assert (bus_connection_is_active (connection)); +- retval = TRUE; ++ retval = BUS_RESULT_TRUE; + + out_0: + _dbus_string_free (&unique_name); +@@ -558,7 +558,7 @@ bus_driver_send_welcome_message (DBusConnection *connection, + } + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_list_services (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -580,14 +580,14 @@ bus_driver_handle_list_services (DBusConnection *connection, + if (reply == NULL) + { + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + if (!bus_registry_list_services (registry, &services, &len)) + { + dbus_message_unref (reply); + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + dbus_message_iter_init_append (reply, &iter); +@@ -599,7 +599,7 @@ bus_driver_handle_list_services (DBusConnection *connection, + dbus_free_string_array (services); + dbus_message_unref (reply); + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + { +@@ -611,7 +611,7 @@ bus_driver_handle_list_services (DBusConnection *connection, + dbus_free_string_array (services); + dbus_message_unref (reply); + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + } + +@@ -624,7 +624,7 @@ bus_driver_handle_list_services (DBusConnection *connection, + dbus_free_string_array (services); + dbus_message_unref (reply); + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + ++i; + } +@@ -635,23 +635,23 @@ bus_driver_handle_list_services (DBusConnection *connection, + { + dbus_message_unref (reply); + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + if (!bus_transaction_send_from_driver (transaction, connection, reply)) + { + dbus_message_unref (reply); + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + else + { + dbus_message_unref (reply); +- return TRUE; ++ return BUS_RESULT_TRUE; + } + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_list_activatable_services (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -673,14 +673,14 @@ bus_driver_handle_list_activatable_services (DBusConnection *connection, + if (reply == NULL) + { + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + if (!bus_activation_list_services (activation, &services, &len)) + { + dbus_message_unref (reply); + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + dbus_message_iter_init_append (reply, &iter); +@@ -692,7 +692,7 @@ bus_driver_handle_list_activatable_services (DBusConnection *connection, + dbus_free_string_array (services); + dbus_message_unref (reply); + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + { +@@ -704,7 +704,7 @@ bus_driver_handle_list_activatable_services (DBusConnection *connection, + dbus_free_string_array (services); + dbus_message_unref (reply); + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + } + +@@ -717,7 +717,7 @@ bus_driver_handle_list_activatable_services (DBusConnection *connection, + dbus_free_string_array (services); + dbus_message_unref (reply); + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + ++i; + } +@@ -728,23 +728,23 @@ bus_driver_handle_list_activatable_services (DBusConnection *connection, + { + dbus_message_unref (reply); + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + if (!bus_transaction_send_from_driver (transaction, connection, reply)) + { + dbus_message_unref (reply); + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + else + { + dbus_message_unref (reply); +- return TRUE; ++ return BUS_RESULT_TRUE; + } + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_acquire_service (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -755,7 +755,8 @@ bus_driver_handle_acquire_service (DBusConnection *connection, + const char *name; + dbus_uint32_t service_reply; + dbus_uint32_t flags; +- dbus_bool_t retval; ++ BusResult retval; ++ BusResult res; + BusRegistry *registry; + + _DBUS_ASSERT_ERROR_IS_CLEAR (error); +@@ -766,20 +767,24 @@ bus_driver_handle_acquire_service (DBusConnection *connection, + DBUS_TYPE_STRING, &name, + DBUS_TYPE_UINT32, &flags, + DBUS_TYPE_INVALID)) +- return FALSE; ++ return BUS_RESULT_FALSE; + + _dbus_verbose ("Trying to own name %s with flags 0x%x\n", name, flags); + +- retval = FALSE; ++ retval = BUS_RESULT_FALSE; + reply = NULL; + + _dbus_string_init_const (&service_name, name); + +- if (!bus_registry_acquire_service (registry, connection, +- &service_name, flags, +- &service_reply, transaction, +- error)) +- goto out; ++ res = bus_registry_acquire_service (registry, connection, message, ++ &service_name, flags, ++ &service_reply, transaction, ++ error); ++ if (res != BUS_RESULT_TRUE) ++ { ++ retval = res; ++ goto out; ++ } + + reply = dbus_message_new_method_return (message); + if (reply == NULL) +@@ -800,7 +805,7 @@ bus_driver_handle_acquire_service (DBusConnection *connection, + goto out; + } + +- retval = TRUE; ++ retval = BUS_RESULT_TRUE; + + out: + if (reply) +@@ -808,7 +813,7 @@ bus_driver_handle_acquire_service (DBusConnection *connection, + return retval; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_release_service (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -818,7 +823,7 @@ bus_driver_handle_release_service (DBusConnection *connection, + DBusString service_name; + const char *name; + dbus_uint32_t service_reply; +- dbus_bool_t retval; ++ BusResult retval; + BusRegistry *registry; + + _DBUS_ASSERT_ERROR_IS_CLEAR (error); +@@ -828,11 +833,11 @@ bus_driver_handle_release_service (DBusConnection *connection, + if (!dbus_message_get_args (message, error, + DBUS_TYPE_STRING, &name, + DBUS_TYPE_INVALID)) +- return FALSE; ++ return BUS_RESULT_FALSE; + + _dbus_verbose ("Trying to release name %s\n", name); + +- retval = FALSE; ++ retval = BUS_RESULT_FALSE; + reply = NULL; + + _dbus_string_init_const (&service_name, name); +@@ -861,7 +866,7 @@ bus_driver_handle_release_service (DBusConnection *connection, + goto out; + } + +- retval = TRUE; ++ retval = BUS_RESULT_TRUE; + + out: + if (reply) +@@ -869,7 +874,7 @@ bus_driver_handle_release_service (DBusConnection *connection, + return retval; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_service_exists (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -880,7 +885,7 @@ bus_driver_handle_service_exists (DBusConnection *connection, + BusService *service; + dbus_bool_t service_exists; + const char *name; +- dbus_bool_t retval; ++ BusResult retval; + BusRegistry *registry; + + _DBUS_ASSERT_ERROR_IS_CLEAR (error); +@@ -890,9 +895,9 @@ bus_driver_handle_service_exists (DBusConnection *connection, + if (!dbus_message_get_args (message, error, + DBUS_TYPE_STRING, &name, + DBUS_TYPE_INVALID)) +- return FALSE; ++ return BUS_RESULT_FALSE; + +- retval = FALSE; ++ retval = BUS_RESULT_FALSE; + + if (strcmp (name, DBUS_SERVICE_DBUS) == 0) + { +@@ -926,7 +931,7 @@ bus_driver_handle_service_exists (DBusConnection *connection, + goto out; + } + +- retval = TRUE; ++ retval = BUS_RESULT_TRUE; + + out: + if (reply) +@@ -935,7 +940,7 @@ bus_driver_handle_service_exists (DBusConnection *connection, + return retval; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_activate_service (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -943,7 +948,7 @@ bus_driver_handle_activate_service (DBusConnection *connection, + { + dbus_uint32_t flags; + const char *name; +- dbus_bool_t retval; ++ BusResult retval; + BusActivation *activation; + + _DBUS_ASSERT_ERROR_IS_CLEAR (error); +@@ -957,10 +962,10 @@ bus_driver_handle_activate_service (DBusConnection *connection, + { + _DBUS_ASSERT_ERROR_IS_SET (error); + _dbus_verbose ("No memory to get arguments to StartServiceByName\n"); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + +- retval = FALSE; ++ retval = BUS_RESULT_FALSE; + + if (!bus_activation_activate_service (activation, connection, transaction, FALSE, + message, name, error)) +@@ -970,7 +975,7 @@ bus_driver_handle_activate_service (DBusConnection *connection, + goto out; + } + +- retval = TRUE; ++ retval = BUS_RESULT_TRUE; + + out: + return retval; +@@ -1072,13 +1077,13 @@ bus_driver_send_or_activate (BusTransaction *transaction, + return TRUE; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_update_activation_environment (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, + DBusError *error) + { +- dbus_bool_t retval; ++ BusResult retval; + BusActivation *activation; + BusContext *context; + DBusMessageIter iter; +@@ -1100,7 +1105,7 @@ bus_driver_handle_update_activation_environment (DBusConnection *connection, + dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED, + "Cannot change activation environment " + "on a system bus."); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + activation = bus_connection_get_activation (connection); +@@ -1114,7 +1119,7 @@ bus_driver_handle_update_activation_environment (DBusConnection *connection, + + dbus_message_iter_recurse (&iter, &dict_iter); + +- retval = FALSE; ++ retval = BUS_RESULT_FALSE; + systemd_message = NULL; + + /* Then loop through the sent dictionary, add the location of +@@ -1279,7 +1284,7 @@ bus_driver_handle_update_activation_environment (DBusConnection *connection, + if (!bus_driver_send_ack_reply (connection, transaction, message, error)) + goto out; + +- retval = TRUE; ++ retval = BUS_RESULT_TRUE; + + out: + if (systemd_message != NULL) +@@ -1289,7 +1294,7 @@ bus_driver_handle_update_activation_environment (DBusConnection *connection, + return retval; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_add_match (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -1371,16 +1376,16 @@ bus_driver_handle_add_match (DBusConnection *connection, + + bus_match_rule_unref (rule); + +- return TRUE; ++ return BUS_RESULT_TRUE; + + failed: + _DBUS_ASSERT_ERROR_IS_SET (error); + if (rule) + bus_match_rule_unref (rule); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_remove_match (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -1423,16 +1428,16 @@ bus_driver_handle_remove_match (DBusConnection *connection, + + bus_match_rule_unref (rule); + +- return TRUE; ++ return BUS_RESULT_TRUE; + + failed: + _DBUS_ASSERT_ERROR_IS_SET (error); + if (rule) + bus_match_rule_unref (rule); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_get_service_owner (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -1502,7 +1507,7 @@ bus_driver_handle_get_service_owner (DBusConnection *connection, + + dbus_message_unref (reply); + +- return TRUE; ++ return BUS_RESULT_TRUE; + + oom: + BUS_SET_OOM (error); +@@ -1511,10 +1516,10 @@ bus_driver_handle_get_service_owner (DBusConnection *connection, + _DBUS_ASSERT_ERROR_IS_SET (error); + if (reply) + dbus_message_unref (reply); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_list_queued_owners (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -1606,7 +1611,7 @@ bus_driver_handle_list_queued_owners (DBusConnection *connection, + + dbus_message_unref (reply); + +- return TRUE; ++ return BUS_RESULT_TRUE; + + oom: + BUS_SET_OOM (error); +@@ -1619,10 +1624,10 @@ bus_driver_handle_list_queued_owners (DBusConnection *connection, + if (base_names) + _dbus_list_clear (&base_names); + +- return FALSE; ++ return BUS_RESULT_FALSE; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_get_connection_unix_user (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -1679,7 +1684,7 @@ bus_driver_handle_get_connection_unix_user (DBusConnection *connection, + + dbus_message_unref (reply); + +- return TRUE; ++ return BUS_RESULT_TRUE; + + oom: + BUS_SET_OOM (error); +@@ -1688,10 +1693,10 @@ bus_driver_handle_get_connection_unix_user (DBusConnection *connection, + _DBUS_ASSERT_ERROR_IS_SET (error); + if (reply) + dbus_message_unref (reply); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_get_connection_unix_process_id (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -1748,7 +1753,7 @@ bus_driver_handle_get_connection_unix_process_id (DBusConnection *connection, + + dbus_message_unref (reply); + +- return TRUE; ++ return BUS_RESULT_TRUE; + + oom: + BUS_SET_OOM (error); +@@ -1757,10 +1762,10 @@ bus_driver_handle_get_connection_unix_process_id (DBusConnection *connection, + _DBUS_ASSERT_ERROR_IS_SET (error); + if (reply) + dbus_message_unref (reply); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_get_adt_audit_session_data (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -1811,7 +1816,7 @@ bus_driver_handle_get_adt_audit_session_data (DBusConnection *connection, + + dbus_message_unref (reply); + +- return TRUE; ++ return BUS_RESULT_TRUE; + + oom: + BUS_SET_OOM (error); +@@ -1820,10 +1825,10 @@ bus_driver_handle_get_adt_audit_session_data (DBusConnection *connection, + _DBUS_ASSERT_ERROR_IS_SET (error); + if (reply) + dbus_message_unref (reply); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_get_connection_selinux_security_context (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -1872,7 +1877,7 @@ bus_driver_handle_get_connection_selinux_security_context (DBusConnection *conne + + dbus_message_unref (reply); + +- return TRUE; ++ return BUS_RESULT_TRUE; + + oom: + BUS_SET_OOM (error); +@@ -1881,10 +1886,10 @@ bus_driver_handle_get_connection_selinux_security_context (DBusConnection *conne + _DBUS_ASSERT_ERROR_IS_SET (error); + if (reply) + dbus_message_unref (reply); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_get_connection_credentials (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -1998,7 +2003,7 @@ bus_driver_handle_get_connection_credentials (DBusConnection *connection, + + dbus_message_unref (reply); + +- return TRUE; ++ return BUS_RESULT_TRUE; + + oom: + BUS_SET_OOM (error); +@@ -2012,10 +2017,10 @@ bus_driver_handle_get_connection_credentials (DBusConnection *connection, + dbus_message_unref (reply); + } + +- return FALSE; ++ return BUS_RESULT_FALSE; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_reload_config (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -2040,7 +2045,7 @@ bus_driver_handle_reload_config (DBusConnection *connection, + goto oom; + + dbus_message_unref (reply); +- return TRUE; ++ return BUS_RESULT_TRUE; + + oom: + BUS_SET_OOM (error); +@@ -2049,11 +2054,11 @@ bus_driver_handle_reload_config (DBusConnection *connection, + _DBUS_ASSERT_ERROR_IS_SET (error); + if (reply) + dbus_message_unref (reply); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + #ifdef DBUS_ENABLE_VERBOSE_MODE +-static dbus_bool_t ++static BusResult + bus_driver_handle_enable_verbose (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -2073,7 +2078,7 @@ bus_driver_handle_enable_verbose (DBusConnection *connection, + _dbus_set_verbose(TRUE); + + dbus_message_unref (reply); +- return TRUE; ++ return BUS_RESULT_TRUE; + + oom: + _DBUS_ASSERT_ERROR_IS_CLEAR (error); +@@ -2082,10 +2087,10 @@ bus_driver_handle_enable_verbose (DBusConnection *connection, + + if (reply) + dbus_message_unref (reply); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_disable_verbose (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -2105,7 +2110,7 @@ bus_driver_handle_disable_verbose (DBusConnection *connection, + _dbus_set_verbose(FALSE); + + dbus_message_unref (reply); +- return TRUE; ++ return BUS_RESULT_TRUE; + + oom: + _DBUS_ASSERT_ERROR_IS_CLEAR (error); +@@ -2114,11 +2119,11 @@ bus_driver_handle_disable_verbose (DBusConnection *connection, + + if (reply) + dbus_message_unref (reply); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + #endif + +-static dbus_bool_t ++static BusResult + bus_driver_handle_get_id (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -2134,7 +2139,7 @@ bus_driver_handle_get_id (DBusConnection *connection, + if (!_dbus_string_init (&uuid)) + { + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + reply = NULL; +@@ -2160,7 +2165,7 @@ bus_driver_handle_get_id (DBusConnection *connection, + + _dbus_string_free (&uuid); + dbus_message_unref (reply); +- return TRUE; ++ return BUS_RESULT_TRUE; + + oom: + _DBUS_ASSERT_ERROR_IS_CLEAR (error); +@@ -2170,10 +2175,10 @@ bus_driver_handle_get_id (DBusConnection *connection, + if (reply) + dbus_message_unref (reply); + _dbus_string_free (&uuid); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_become_monitor (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -2189,7 +2194,7 @@ bus_driver_handle_become_monitor (DBusConnection *connection, + int i; + int n_match_rules; + dbus_uint32_t flags; +- dbus_bool_t ret = FALSE; ++ BusResult ret = BUS_RESULT_FALSE; + + _DBUS_ASSERT_ERROR_IS_CLEAR (error); + +@@ -2262,10 +2267,10 @@ bus_driver_handle_become_monitor (DBusConnection *connection, + if (!bus_connection_be_monitor (connection, transaction, &rules, error)) + goto out; + +- ret = TRUE; ++ ret = BUS_RESULT_TRUE; + + out: +- if (ret) ++ if (ret == BUS_RESULT_TRUE) + _DBUS_ASSERT_ERROR_IS_CLEAR (error); + else + _DBUS_ASSERT_ERROR_IS_SET (error); +@@ -2281,7 +2286,7 @@ out: + return ret; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_get_machine_id (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -2296,7 +2301,7 @@ bus_driver_handle_get_machine_id (DBusConnection *connection, + if (!_dbus_string_init (&uuid)) + { + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + if (!_dbus_get_local_machine_uuid_encoded (&uuid, error)) +@@ -2321,7 +2326,7 @@ bus_driver_handle_get_machine_id (DBusConnection *connection, + + _dbus_string_free (&uuid); + dbus_message_unref (reply); +- return TRUE; ++ return BUS_RESULT_TRUE; + + oom: + _DBUS_ASSERT_ERROR_IS_CLEAR (error); +@@ -2335,29 +2340,30 @@ fail: + dbus_message_unref (reply); + + _dbus_string_free (&uuid); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_ping (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, + DBusError *error) + { +- return bus_driver_send_ack_reply (connection, transaction, message, error); ++ return bus_driver_send_ack_reply (connection, transaction, message, error) == TRUE ++ ? BUS_RESULT_TRUE : BUS_RESULT_FALSE; + } + +-static dbus_bool_t bus_driver_handle_get (DBusConnection *connection, ++static BusResult bus_driver_handle_get (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, + DBusError *error); + +-static dbus_bool_t bus_driver_handle_get_all (DBusConnection *connection, ++static BusResult bus_driver_handle_get_all (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, + DBusError *error); + +-static dbus_bool_t bus_driver_handle_set (DBusConnection *connection, ++static BusResult bus_driver_handle_set (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, + DBusError *error); +@@ -2389,10 +2395,10 @@ typedef struct + const char *name; + const char *in_args; + const char *out_args; +- dbus_bool_t (* handler) (DBusConnection *connection, +- BusTransaction *transaction, +- DBusMessage *message, +- DBusError *error); ++ BusResult (* handler) (DBusConnection *connection, ++ BusTransaction *transaction, ++ DBusMessage *message, ++ DBusError *error); + MethodFlags flags; + } MessageHandler; + +@@ -2511,7 +2517,7 @@ static const PropertyHandler dbus_property_handlers[] = { + { NULL, NULL, NULL } + }; + +-static dbus_bool_t bus_driver_handle_introspect (DBusConnection *, ++static BusResult bus_driver_handle_introspect (DBusConnection *, + BusTransaction *, DBusMessage *, DBusError *); + + static const MessageHandler properties_message_handlers[] = { +@@ -2763,7 +2769,7 @@ bus_driver_generate_introspect_string (DBusString *xml, + return TRUE; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_introspect (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -2784,13 +2790,13 @@ bus_driver_handle_introspect (DBusConnection *connection, + DBUS_TYPE_INVALID)) + { + _DBUS_ASSERT_ERROR_IS_SET (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + if (!_dbus_string_init (&xml)) + { + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + is_canonical_path = dbus_message_has_path (message, DBUS_PATH_DBUS); +@@ -2815,7 +2821,7 @@ bus_driver_handle_introspect (DBusConnection *connection, + dbus_message_unref (reply); + _dbus_string_free (&xml); + +- return TRUE; ++ return BUS_RESULT_TRUE; + + oom: + BUS_SET_OOM (error); +@@ -2825,10 +2831,42 @@ bus_driver_handle_introspect (DBusConnection *connection, + + _dbus_string_free (&xml); + +- return FALSE; ++ return BUS_RESULT_FALSE; + } + ++/* ++ * Set @error and return FALSE if the message is not directed to the ++ * dbus-daemon by its canonical object path. This is hardening against ++ * system services with poorly-written security policy files, which ++ * might allow sending dangerously broad equivalence classes of messages ++ * such as "anything with this assumed-to-be-safe object path". ++ * ++ * dbus-daemon is unusual in that it normally ignores the object path ++ * of incoming messages; we need to keep that behaviour for the "read" ++ * read-only method calls like GetConnectionUnixUser for backwards ++ * compatibility, but it seems safer to be more restrictive for things ++ * intended to be root-only or privileged-developers-only. ++ * ++ * It is possible that there are other system services with the same ++ * quirk as dbus-daemon. ++ */ + dbus_bool_t ++bus_driver_check_message_is_for_us (DBusMessage *message, ++ DBusError *error) ++{ ++ if (!dbus_message_has_path (message, DBUS_PATH_DBUS)) ++ { ++ dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED, ++ "Method '%s' is only available at the canonical object path '%s'", ++ dbus_message_get_member (message), DBUS_PATH_DBUS); ++ ++ return FALSE; ++ } ++ ++ return TRUE; ++} ++ ++BusResult + bus_driver_handle_message (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -2839,6 +2877,7 @@ bus_driver_handle_message (DBusConnection *connection, + const MessageHandler *mh; + dbus_bool_t found_interface = FALSE; + dbus_bool_t is_canonical_path; ++ BusResult res; + + _DBUS_ASSERT_ERROR_IS_CLEAR (error); + +@@ -2854,7 +2893,7 @@ bus_driver_handle_message (DBusConnection *connection, + transaction, + message, + error)) +- return FALSE; ++ return BUS_RESULT_FALSE; + + context = bus_connection_get_context (connection); + systemd = bus_driver_get_owner_of_name (connection, +@@ -2871,7 +2910,7 @@ bus_driver_handle_message (DBusConnection *connection, + attacker ? attacker : "(unauthenticated)", + bus_connection_get_loginfo (connection)); + /* ignore it */ +- return TRUE; ++ return BUS_RESULT_TRUE; + } + + if (!bus_context_get_systemd_activation (context)) +@@ -2879,16 +2918,16 @@ bus_driver_handle_message (DBusConnection *connection, + bus_context_log (context, DBUS_SYSTEM_LOG_WARNING, + "Ignoring unexpected ActivationFailure message " + "while not using systemd activation"); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + +- return dbus_activation_systemd_failure(bus_context_get_activation(context), message); ++ return dbus_activation_systemd_failure(bus_context_get_activation(context), message) == TRUE ? BUS_RESULT_TRUE : BUS_RESULT_FALSE; + } + + if (dbus_message_get_type (message) != DBUS_MESSAGE_TYPE_METHOD_CALL) + { + _dbus_verbose ("Driver got a non-method-call message, ignoring\n"); +- return TRUE; /* we just ignore this */ ++ return BUS_RESULT_TRUE; /* we just ignore this */ + } + + /* may be NULL, which means "any interface will do" */ +@@ -2953,20 +2992,27 @@ bus_driver_handle_message (DBusConnection *connection, + name, dbus_message_get_signature (message), + mh->in_args); + _DBUS_ASSERT_ERROR_IS_SET (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + +- if ((* mh->handler) (connection, transaction, message, error)) ++ res = (* mh->handler) (connection, transaction, message, error); ++ if (res == BUS_RESULT_TRUE) + { + _DBUS_ASSERT_ERROR_IS_CLEAR (error); + _dbus_verbose ("Driver handler succeeded\n"); +- return TRUE; ++ return BUS_RESULT_TRUE; + } +- else ++ else if (res == BUS_RESULT_FALSE) + { + _DBUS_ASSERT_ERROR_IS_SET (error); + _dbus_verbose ("Driver handler returned failure\n"); +- return FALSE; ++ return BUS_RESULT_FALSE; ++ } ++ else if (res == BUS_RESULT_LATER) ++ { ++ _DBUS_ASSERT_ERROR_IS_CLEAR (error); ++ _dbus_verbose ("Driver handler delayed message processing due to policy check\n"); ++ return BUS_RESULT_LATER; + } + } + } +@@ -2978,7 +3024,7 @@ bus_driver_handle_message (DBusConnection *connection, + "%s does not understand message %s", + DBUS_SERVICE_DBUS, name); + +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + void +@@ -3099,7 +3145,7 @@ interface_handler_find_property (const InterfaceHandler *ih, + return NULL; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_get (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -3120,18 +3166,18 @@ bus_driver_handle_get (DBusConnection *connection, + DBUS_TYPE_STRING, &iface, + DBUS_TYPE_STRING, &prop, + DBUS_TYPE_INVALID)) +- return FALSE; ++ return BUS_RESULT_FALSE; + + /* We only implement Properties on /org/freedesktop/DBus so far. */ + ih = bus_driver_find_interface (iface, TRUE, error); + + if (ih == NULL) +- return FALSE; ++ return BUS_RESULT_FALSE; + + handler = interface_handler_find_property (ih, prop, error); + + if (handler == NULL) +- return FALSE; ++ return BUS_RESULT_FALSE; + + context = bus_transaction_get_context (transaction); + +@@ -3159,17 +3205,17 @@ bus_driver_handle_get (DBusConnection *connection, + goto oom; + + dbus_message_unref (reply); +- return TRUE; ++ return BUS_RESULT_TRUE; + + oom: + if (reply != NULL) + dbus_message_unref (reply); + + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_get_all (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -3188,13 +3234,13 @@ bus_driver_handle_get_all (DBusConnection *connection, + if (!dbus_message_get_args (message, error, + DBUS_TYPE_STRING, &iface, + DBUS_TYPE_INVALID)) +- return FALSE; ++ return BUS_RESULT_FALSE; + + /* We only implement Properties on /org/freedesktop/DBus so far. */ + ih = bus_driver_find_interface (iface, TRUE, error); + + if (ih == NULL) +- return FALSE; ++ return BUS_RESULT_FALSE; + + context = bus_transaction_get_context (transaction); + +@@ -3229,7 +3275,7 @@ bus_driver_handle_get_all (DBusConnection *connection, + goto oom; + + dbus_message_unref (reply); +- return TRUE; ++ return BUS_RESULT_TRUE; + + oom_abandon_message: + _dbus_asv_abandon (&reply_iter, &array_iter); +@@ -3239,10 +3285,10 @@ oom: + dbus_message_unref (reply); + + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + +-static dbus_bool_t ++static BusResult + bus_driver_handle_set (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -3271,15 +3317,15 @@ bus_driver_handle_set (DBusConnection *connection, + ih = bus_driver_find_interface (iface, TRUE, error); + + if (ih == NULL) +- return FALSE; ++ return BUS_RESULT_FALSE; + + handler = interface_handler_find_property (ih, prop, error); + + if (handler == NULL) +- return FALSE; ++ return BUS_RESULT_FALSE; + + /* We don't implement any properties that can be set yet. */ + dbus_set_error (error, DBUS_ERROR_PROPERTY_READ_ONLY, + "Property '%s.%s' cannot be set", iface, prop); +- return FALSE; ++ return BUS_RESULT_FALSE; + } +diff --git a/bus/driver.h b/bus/driver.h +index a7297ad..05e9886 100644 +--- a/bus/driver.h ++++ b/bus/driver.h +@@ -35,7 +35,7 @@ typedef enum + } BusDriverFound; + + void bus_driver_remove_connection (DBusConnection *connection); +-dbus_bool_t bus_driver_handle_message (DBusConnection *connection, ++BusResult bus_driver_handle_message (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, + DBusError *error); +diff --git a/bus/policy.c b/bus/policy.c +index 483cc97..f6f4d85 100644 +--- a/bus/policy.c ++++ b/bus/policy.c +@@ -1390,18 +1390,21 @@ bus_client_policy_check_can_receive (BusClientPolicy *policy, + + + +-static dbus_bool_t ++static BusResult + bus_rules_check_can_own (DBusList *rules, +- const DBusString *service_name) ++ const DBusString *service_name, ++ DBusConnection *connection, ++ DBusMessage *message) + { + DBusList *link; +- dbus_bool_t allowed; ++ BusResult result; ++ const char *privilege; + + /* rules is in the order the rules appeared + * in the config file, i.e. last rule that applies wins + */ + +- allowed = FALSE; ++ result = BUS_RESULT_FALSE; + link = _dbus_list_get_first_link (&rules); + while (link != NULL) + { +@@ -1437,17 +1440,46 @@ bus_rules_check_can_own (DBusList *rules, + } + + /* Use this rule */ +- allowed = rule->access == BUS_POLICY_RULE_ACCESS_ALLOW; ++ switch (rule->access) ++ { ++ case BUS_POLICY_RULE_ACCESS_ALLOW: ++ result = BUS_RESULT_TRUE; ++ break; ++ default: ++ case BUS_POLICY_RULE_ACCESS_DENY: ++ result = BUS_RESULT_FALSE; ++ break; ++ case BUS_POLICY_RULE_ACCESS_CHECK: ++ result = BUS_RESULT_LATER; ++ privilege = rule->privilege; ++ break; ++ } + } + +- return allowed; ++ if (result == BUS_RESULT_LATER) ++ { ++ BusContext *context = bus_connection_get_context(connection); ++ BusCheck *check = bus_context_get_check(context); ++ BusDeferredMessage *deferred_message; ++ ++ result = bus_check_privilege(check, message, connection, NULL, NULL, ++ privilege, BUS_DEFERRED_MESSAGE_CHECK_OWN, &deferred_message); ++ if (result == BUS_RESULT_LATER) ++ { ++ bus_deferred_message_disable_sender(deferred_message); ++ } ++ } ++ ++ return result; + } + +-dbus_bool_t ++BusResult + bus_client_policy_check_can_own (BusClientPolicy *policy, +- const DBusString *service_name) ++ const DBusString *service_name, ++ DBusConnection *connection, ++ DBusMessage *message) + { +- return bus_rules_check_can_own (policy->rules, service_name); ++ return bus_rules_check_can_own (policy->rules, service_name, connection, message); + } + + #ifdef DBUS_ENABLE_EMBEDDED_TESTS +@@ -1455,7 +1487,7 @@ dbus_bool_t + bus_policy_check_can_own (BusPolicy *policy, + const DBusString *service_name) + { +- return bus_rules_check_can_own (policy->default_rules, service_name); ++ return bus_rules_check_can_own (policy->default_rules, service_name, NULL, NULL) == BUS_RESULT_TRUE; + } + #endif /* DBUS_ENABLE_EMBEDDED_TESTS */ + +diff --git a/bus/policy.h b/bus/policy.h +index f839d23..28ce8f2 100644 +--- a/bus/policy.h ++++ b/bus/policy.h +@@ -182,8 +182,10 @@ BusResult bus_client_policy_check_can_receive (BusClientPolicy *policy, + dbus_int32_t *toggles, + const char **privilege_param, + BusDeferredMessage **deferred_message); +-dbus_bool_t bus_client_policy_check_can_own (BusClientPolicy *policy, +- const DBusString *service_name); ++BusResult bus_client_policy_check_can_own (BusClientPolicy *policy, ++ const DBusString *service_name, ++ DBusConnection *connection, ++ DBusMessage *message); + dbus_bool_t bus_client_policy_append_rule (BusClientPolicy *policy, + BusPolicyRule *rule); + void bus_client_policy_optimize (BusClientPolicy *policy); +diff --git a/bus/services.c b/bus/services.c +index 127edda..586af18 100644 +--- a/bus/services.c ++++ b/bus/services.c +@@ -376,16 +376,17 @@ bus_registry_list_services (BusRegistry *registry, + return FALSE; + } + +-dbus_bool_t ++BusResult + bus_registry_acquire_service (BusRegistry *registry, + DBusConnection *connection, ++ DBusMessage *message, + const DBusString *service_name, + dbus_uint32_t flags, + dbus_uint32_t *result, + BusTransaction *transaction, + DBusError *error) + { +- dbus_bool_t retval; ++ BusResult retval; + DBusConnection *old_owner_conn; + BusClientPolicy *policy; + BusService *service; +@@ -393,8 +394,9 @@ bus_registry_acquire_service (BusRegistry *registry, + BusSELinuxID *sid; + BusOwner *primary_owner; + int limit; ++ BusResult res; + +- retval = FALSE; ++ retval = BUS_RESULT_FALSE; + + if (!_dbus_validate_bus_name (service_name, 0, + _dbus_string_get_length (service_name))) +@@ -467,7 +469,8 @@ bus_registry_acquire_service (BusRegistry *registry, + _dbus_string_get_const_data (service_name), error)) + goto out; + +- if (!bus_client_policy_check_can_own (policy, service_name)) ++ res = bus_client_policy_check_can_own (policy, service_name, connection, message); ++ if (res == BUS_RESULT_FALSE) + { + dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED, + "Connection \"%s\" is not allowed to own the service \"%s\" due " +@@ -478,6 +481,11 @@ bus_registry_acquire_service (BusRegistry *registry, + _dbus_string_get_const_data (service_name)); + goto out; + } ++ else if (res == BUS_RESULT_LATER) ++ { ++ retval = BUS_RESULT_LATER; ++ goto out; ++ } + + limit = bus_context_get_max_services_per_connection (registry->context); + +@@ -603,11 +611,13 @@ bus_registry_acquire_service (BusRegistry *registry, + } + + activation = bus_context_get_activation (registry->context); +- retval = bus_activation_send_pending_auto_activation_messages (activation, ++ ++ if (bus_activation_send_pending_auto_activation_messages (activation, + service, +- transaction); +- if (!retval) +- BUS_SET_OOM (error); ++ transaction)) ++ retval = BUS_RESULT_TRUE; ++ else ++ BUS_SET_OOM (error); + + out: + return retval; +diff --git a/bus/services.h b/bus/services.h +index 056dd9f..3df3dd7 100644 +--- a/bus/services.h ++++ b/bus/services.h +@@ -50,8 +50,9 @@ void bus_registry_foreach (BusRegistry *registry + dbus_bool_t bus_registry_list_services (BusRegistry *registry, + char ***listp, + int *array_len); +-dbus_bool_t bus_registry_acquire_service (BusRegistry *registry, ++BusResult bus_registry_acquire_service (BusRegistry *registry, + DBusConnection *connection, ++ DBusMessage *message, + const DBusString *service_name, + dbus_uint32_t flags, + dbus_uint32_t *result, +diff --git a/bus/stats.c b/bus/stats.c +index 1582255..c25be98 100644 +--- a/bus/stats.c ++++ b/bus/stats.c +@@ -36,7 +36,7 @@ + + #ifdef DBUS_ENABLE_STATS + +-dbus_bool_t ++BusResult + bus_stats_handle_get_stats (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -51,6 +51,9 @@ bus_stats_handle_get_stats (DBusConnection *connection, + + _DBUS_ASSERT_ERROR_IS_CLEAR (error); + ++ if (!bus_driver_check_message_is_for_us (message, error)) ++ return BUS_RESULT_FALSE; ++ + context = bus_transaction_get_context (transaction); + connections = bus_context_get_connections (context); + +@@ -104,17 +107,17 @@ bus_stats_handle_get_stats (DBusConnection *connection, + goto oom; + + dbus_message_unref (reply); +- return TRUE; ++ return BUS_RESULT_TRUE; + + oom: + if (reply != NULL) + dbus_message_unref (reply); + + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + +-dbus_bool_t ++BusResult + bus_stats_handle_get_connection_stats (DBusConnection *caller_connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -209,7 +212,7 @@ bus_stats_handle_get_connection_stats (DBusConnection *caller_connection, + goto oom; + + dbus_message_unref (reply); +- return TRUE; ++ return BUS_RESULT_TRUE; + + oom: + BUS_SET_OOM (error); +@@ -218,11 +221,11 @@ failed: + if (reply != NULL) + dbus_message_unref (reply); + +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + +-dbus_bool_t ++BusResult + bus_stats_handle_get_all_match_rules (DBusConnection *caller_connection, + BusTransaction *transaction, + DBusMessage *message, +@@ -246,7 +249,7 @@ bus_stats_handle_get_all_match_rules (DBusConnection *caller_connection, + matchmaker = bus_context_get_matchmaker (context); + + if (!bus_registry_list_services (registry, &services, &services_len)) +- return FALSE; ++ return BUS_RESULT_FALSE; + + reply = dbus_message_new_method_return (message); + if (reply == NULL) +@@ -325,7 +328,7 @@ bus_stats_handle_get_all_match_rules (DBusConnection *caller_connection, + + dbus_message_unref (reply); + dbus_free_string_array (services); +- return TRUE; ++ return BUS_RESULT_TRUE; + + oom: + if (reply != NULL) +@@ -334,7 +337,7 @@ oom: + dbus_free_string_array (services); + + BUS_SET_OOM (error); +- return FALSE; ++ return BUS_RESULT_FALSE; + } + + #endif +diff --git a/bus/stats.h b/bus/stats.h +index dcb022c..683fa17 100644 +--- a/bus/stats.h ++++ b/bus/stats.h +@@ -25,17 +25,17 @@ + + #define BUS_INTERFACE_STATS "org.freedesktop.DBus.Debug.Stats" + +-dbus_bool_t bus_stats_handle_get_stats (DBusConnection *connection, ++BusResult bus_stats_handle_get_stats (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, + DBusError *error); + +-dbus_bool_t bus_stats_handle_get_connection_stats (DBusConnection *connection, ++BusResult bus_stats_handle_get_connection_stats (DBusConnection *connection, + BusTransaction *transaction, + DBusMessage *message, + DBusError *error); + +-dbus_bool_t bus_stats_handle_get_all_match_rules (DBusConnection *caller_connection, ++BusResult bus_stats_handle_get_all_match_rules (DBusConnection *caller_connection, + BusTransaction *transaction, + DBusMessage *message, + DBusError *error); +-- +2.21.1 + diff --git a/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0005-Perform-Cynara-runtime-policy-checks-by-default.patch b/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0005-Perform-Cynara-runtime-policy-checks-by-default.patch new file mode 100644 index 000000000..5f7e96a3b --- /dev/null +++ b/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0005-Perform-Cynara-runtime-policy-checks-by-default.patch @@ -0,0 +1,180 @@ +From 1f7ba56c9ced669951061d13b06e31d96a170e37 Mon Sep 17 00:00:00 2001 +From: Jacek Bukarewicz <j.bukarewicz@samsung.com> +Date: Tue, 23 Jun 2015 11:08:48 +0200 +Subject: [PATCH 5/8] Perform Cynara runtime policy checks by default +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +This change introduces http://tizen.org/privilege/internal/dbus privilege +which is supposed to be available only to trusted system resources. +Checks for this privilege are used in place of certain allow rules to +make security policy more strict. + +For system bus sending and receiving signals now requires +http://tizen.org/privilege/internal/dbus privilege. Requesting name +ownership and sending methods is still denied by default. + +For session bus http://tizen.org/privilege/internal/dbus privilege +is now required for requesting name, calling methods, sending and receiving +signals. + +Services are supposed to override these default settings to implement their +own security policy. + +Cherry picked from e8610297cf7031e94eb314a2e8c11246f4405403 by Jose Bollo + +Updated for dbus 1.10.20 by Scott Murray and José Bollo + +Signed-off-by: Jacek Bukarewicz <j.bukarewicz@samsung.com> +Signed-off-by: José Bollo <jose.bollo@iot.bzh> +Signed-off-by: Scott Murray <scott.murray@konsulko.com> +--- + bus/activation.c | 42 ++++++++++++++++++++++++++---------------- + bus/session.conf.in | 32 ++++++++++++++++++++++++++------ + bus/system.conf.in | 19 +++++++++++++++---- + 3 files changed, 67 insertions(+), 26 deletions(-) + +diff --git a/bus/activation.c b/bus/activation.c +index d4b597c..8aabeaa 100644 +--- a/bus/activation.c ++++ b/bus/activation.c +@@ -1840,22 +1840,32 @@ bus_activation_activate_service (BusActivation *activation, + } + + if (auto_activation && +- entry != NULL && +- BUS_RESULT_TRUE != bus_context_check_security_policy (activation->context, +- transaction, +- connection, /* sender */ +- NULL, /* addressed recipient */ +- NULL, /* proposed recipient */ +- activation_message, +- entry, +- error, +- NULL)) +- { +- _DBUS_ASSERT_ERROR_IS_SET (error); +- _dbus_verbose ("activation not authorized: %s: %s\n", +- error != NULL ? error->name : "(error ignored)", +- error != NULL ? error->message : "(error ignored)"); +- return FALSE; ++ entry != NULL) ++ { ++ BusResult result; ++ ++ result = bus_context_check_security_policy (activation->context, ++ transaction, ++ connection, /* sender */ ++ NULL, /* addressed recipient */ ++ NULL, /* proposed recipient */ ++ activation_message, ++ entry, ++ error, ++ NULL); ++ if (result == BUS_RESULT_FALSE) ++ { ++ _DBUS_ASSERT_ERROR_IS_SET (error); ++ _dbus_verbose ("activation not authorized: %s: %s\n", ++ error != NULL ? error->name : "(error ignored)", ++ error != NULL ? error->message : "(error ignored)"); ++ return FALSE; ++ } ++ if (result == BUS_RESULT_LATER) ++ { ++ /* TODO */ ++ _dbus_verbose ("ALERT FIX ME!!!!!!!!!!!!!!!"); ++ } + } + + /* Bypass the registry lookup if we're auto-activating, bus_dispatch would not +diff --git a/bus/session.conf.in b/bus/session.conf.in +index affa7f1..157dfb4 100644 +--- a/bus/session.conf.in ++++ b/bus/session.conf.in +@@ -27,12 +27,32 @@ + <standard_session_servicedirs /> + + <policy context="default"> +- <!-- Allow everything to be sent --> +- <allow send_destination="*" eavesdrop="true"/> +- <!-- Allow everything to be received --> +- <allow eavesdrop="true"/> +- <!-- Allow anyone to own anything --> +- <allow own="*"/> ++ <!-- By default clients require internal/dbus privilege to communicate ++ with D-Bus services and to claim name ownership. This is internal privilege that ++ is only accessible to trusted system services --> ++ <check own="*" privilege="http://tizen.org/privilege/internal/dbus" /> ++ <check send_type="method_call" privilege="http://tizen.org/privilege/internal/dbus" /> ++ <check send_type="signal" privilege="http://tizen.org/privilege/internal/dbus" /> ++ <check receive_type="signal" privilege="http://tizen.org/privilege/internal/dbus" /> ++ ++ <!-- Reply messages (method returns, errors) are allowed ++ by default --> ++ <allow send_requested_reply="true" send_type="method_return"/> ++ <allow send_requested_reply="true" send_type="error"/> ++ ++ <!-- All messages but signals may be received by default --> ++ <allow receive_type="method_call"/> ++ <allow receive_type="method_return"/> ++ <allow receive_type="error"/> ++ ++ <!-- Allow anyone to talk to the message bus --> ++ <allow send_destination="org.freedesktop.DBus"/> ++ <allow receive_sender="org.freedesktop.DBus"/> ++ ++ <!-- But disallow some specific bus services --> ++ <deny send_destination="org.freedesktop.DBus" ++ send_interface="org.freedesktop.DBus" ++ send_member="UpdateActivationEnvironment"/> + </policy> + + <!-- Include legacy configuration location --> +diff --git a/bus/system.conf.in b/bus/system.conf.in +index f139b55..19d0c04 100644 +--- a/bus/system.conf.in ++++ b/bus/system.conf.in +@@ -50,17 +50,20 @@ + <deny own="*"/> + <deny send_type="method_call"/> + +- <!-- Signals and reply messages (method returns, errors) are allowed ++ <!-- By default clients require internal/dbus privilege to send and receive signaks. ++ This is internal privilege that is only accessible to trusted system services --> ++ <check send_type="signal" privilege="http://tizen.org/privilege/internal/dbus" /> ++ <check receive_type="signal" privilege="http://tizen.org/privilege/internal/dbus" /> ++ ++ <!-- Reply messages (method returns, errors) are allowed + by default --> +- <allow send_type="signal"/> + <allow send_requested_reply="true" send_type="method_return"/> + <allow send_requested_reply="true" send_type="error"/> + +- <!-- All messages may be received by default --> ++ <!-- All messages but signals may be received by default --> + <allow receive_type="method_call"/> + <allow receive_type="method_return"/> + <allow receive_type="error"/> +- <allow receive_type="signal"/> + + <!-- Allow anyone to talk to the message bus --> + <allow send_destination="org.freedesktop.DBus" +@@ -69,6 +72,14 @@ + send_interface="org.freedesktop.DBus.Introspectable"/> + <allow send_destination="org.freedesktop.DBus" + send_interface="org.freedesktop.DBus.Properties"/> ++ <!-- If there is a need specific bus services could be protected by Cynara as well. ++ However, this can lead to deadlock during the boot process when such check is made and ++ Cynara is not yet activated (systemd calls protected method synchronously, ++ dbus daemon tries to consult Cynara, Cynara waits for systemd activation). ++ Therefore it is advised to allow root processes to use bus services. ++ Currently anyone is allowed to talk to the message bus --> ++ <allow receive_sender="org.freedesktop.DBus"/> ++ + <!-- But disallow some specific bus services --> + <deny send_destination="org.freedesktop.DBus" + send_interface="org.freedesktop.DBus" +-- +2.21.1 + diff --git a/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0006-Fix-SIGSEGV-on-disconnections.patch b/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0006-Fix-SIGSEGV-on-disconnections.patch new file mode 100644 index 000000000..e51ad7ce4 --- /dev/null +++ b/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0006-Fix-SIGSEGV-on-disconnections.patch @@ -0,0 +1,109 @@ +From 28077faa11827e1ca7a7245ffd62ee78091b6bd2 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Jos=C3=A9=20Bollo?= <jose.bollo@iot.bzh> +Date: Fri, 16 Aug 2019 13:29:23 +0200 +Subject: [PATCH 6/8] Fix SIGSEGV on disconnections +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Sometime, at start of the system, dbus-daemon was crashing +because a pending authorisation were reactivating a closed +connection. + +Also, clean unused function. + +Signed-off-by: José Bollo <jose.bollo@iot.bzh> +--- + bus/check.c | 5 +++++ + bus/check.h | 1 + + bus/connection.c | 14 +++----------- + bus/connection.h | 3 --- + 4 files changed, 9 insertions(+), 14 deletions(-) + +diff --git a/bus/check.c b/bus/check.c +index f3d283f..b73d08b 100644 +--- a/bus/check.c ++++ b/bus/check.c +@@ -617,3 +617,8 @@ bus_deferred_message_response_received (BusDeferredMessage *deferred_message, + } + } + ++void ++bus_deferred_message_abort (BusDeferredMessage *deferred_message) ++{ ++ deferred_message->response_callback = NULL; ++} +diff --git a/bus/check.h b/bus/check.h +index 9c13c18..d718a69 100644 +--- a/bus/check.h ++++ b/bus/check.h +@@ -93,6 +93,7 @@ void bus_deferred_message_set_policy_check_info (BusDeferredMessa + const char *privilege); + dbus_bool_t bus_deferred_message_check_message_limits (BusDeferredMessage *deferred_message, + DBusError *error); ++void bus_deferred_message_abort (BusDeferredMessage *deferred_message); + + + #ifdef DBUS_ENABLE_EMBEDDED_TESTS +diff --git a/bus/connection.c b/bus/connection.c +index ee93384..b520d57 100644 +--- a/bus/connection.c ++++ b/bus/connection.c +@@ -47,6 +47,7 @@ + #define MAX_LOG_COMMAND_LEN 50 + + static void bus_connection_remove_transactions (DBusConnection *connection); ++static void bus_connection_clear_deferred_messages (DBusConnection *connection); + + typedef struct + { +@@ -2821,17 +2822,7 @@ bus_connection_pop_deferred_message (DBusConnection *connection) + return NULL; + } + +-dbus_bool_t +-bus_connection_putback_deferred_message (DBusConnection *connection, BusDeferredMessage *message) +-{ +- BusConnectionData *d = BUS_CONNECTION_DATA(connection); +- if (_dbus_list_prepend(&d->deferred_messages, message)) +- { +- return TRUE; +- } +- return FALSE; +-} +- ++static + void + bus_connection_clear_deferred_messages (DBusConnection *connection) + { +@@ -2846,6 +2837,7 @@ bus_connection_clear_deferred_messages (DBusConnection *connection) + next = _dbus_list_get_next_link (&d->deferred_messages, link); + message = link->data; + ++ bus_deferred_message_abort(message); + bus_deferred_message_unref(message); + _dbus_list_remove_link(&d->deferred_messages, link); + +diff --git a/bus/connection.h b/bus/connection.h +index 97dae96..6af7bf1 100644 +--- a/bus/connection.h ++++ b/bus/connection.h +@@ -90,15 +90,12 @@ dbus_bool_t bus_connection_queue_deferred_message (DBusConnection *con + BusDeferredMessage *message, + dbus_bool_t prepend); + BusDeferredMessage *bus_connection_pop_deferred_message (DBusConnection *connection); +-dbus_bool_t bus_connection_putback_deferred_message (DBusConnection *connection, +- BusDeferredMessage *message); + void bus_connection_remove_deferred_message (DBusConnection *connection, + BusDeferredMessage *message); + dbus_bool_t bus_connection_replace_deferred_message (DBusConnection *connection, + BusDeferredMessage *oldMessage, + BusDeferredMessage *newMessage); + void bus_connection_dispatch_deferred (DBusConnection *connection); +-void bus_connection_clear_deferred_messages (DBusConnection *connection); + + + /* called by signals.c */ +-- +2.21.1 + diff --git a/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0007-Switch-from-cynara-to-cynagora.patch b/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0007-Switch-from-cynara-to-cynagora.patch new file mode 100644 index 000000000..7a69efcd2 --- /dev/null +++ b/meta-security/recipes-core/dbus-cynagora/dbus-cynagora/0007-Switch-from-cynara-to-cynagora.patch @@ -0,0 +1,1048 @@ +From 43cc361a5c32c81c0f93451bdb0ef781cd19a1cb Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Jos=C3=A9=20Bollo?= <jose.bollo@iot.bzh> +Date: Tue, 4 Feb 2020 12:23:36 +0100 +Subject: [PATCH 7/8] Switch from cynara to cynagora +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Signed-off-by: José Bollo <jose.bollo@iot.bzh> +--- + bus/Makefile.am | 8 +- + bus/bus.h | 2 +- + bus/check.c | 26 +- + bus/check.h | 2 +- + bus/connection.c | 27 --- + bus/connection.h | 3 - + bus/cynagora-check.c | 330 +++++++++++++++++++++++++ + bus/{cynara.h => cynagora-check.h} | 10 +- + bus/cynara.c | 373 ----------------------------- + bus/system.conf.in | 6 +- + configure.ac | 18 +- + 11 files changed, 366 insertions(+), 439 deletions(-) + create mode 100644 bus/cynagora-check.c + rename bus/{cynara.h => cynagora-check.h} (81%) + delete mode 100644 bus/cynara.c + +diff --git a/bus/Makefile.am b/bus/Makefile.am +index 2a8a72c..1720048 100644 +--- a/bus/Makefile.am ++++ b/bus/Makefile.am +@@ -13,7 +13,7 @@ DBUS_BUS_LIBS = \ + $(THREAD_LIBS) \ + $(ADT_LIBS) \ + $(NETWORK_libs) \ +- $(CYNARA_LIBS) \ ++ $(CYNAGORA_LIBS) \ + $(NULL) + + DBUS_LAUNCHER_LIBS = \ +@@ -31,7 +31,7 @@ AM_CPPFLAGS = \ + $(APPARMOR_CFLAGS) \ + -DDBUS_SYSTEM_CONFIG_FILE=\""$(dbusdatadir)/system.conf"\" \ + -DDBUS_COMPILATION \ +- $(CYNARA_CFLAGS) \ ++ $(CYNAGORA_CFLAGS) \ + $(NULL) + + # if assertions are enabled, improve backtraces +@@ -101,8 +101,8 @@ BUS_SOURCES= \ + config-parser-common.h \ + connection.c \ + connection.h \ +- cynara.c \ +- cynara.h \ ++ cynagora-check.c \ ++ cynagora-check.h \ + desktop-file.c \ + desktop-file.h \ + $(DIR_WATCH_SOURCE) \ +diff --git a/bus/bus.h b/bus/bus.h +index 1b08f7c..e167d9e 100644 +--- a/bus/bus.h ++++ b/bus/bus.h +@@ -47,7 +47,7 @@ typedef struct BusMatchRule BusMatchRule; + typedef struct BusActivationEntry BusActivationEntry; + typedef struct BusCheck BusCheck; + typedef struct BusDeferredMessage BusDeferredMessage; +-typedef struct BusCynara BusCynara; ++typedef struct BusCynagora BusCynagora; + + /** + * BusResult is defined as a pointer to a dummy structure to allow detection of type mismatches. +diff --git a/bus/check.c b/bus/check.c +index b73d08b..ec30770 100644 +--- a/bus/check.c ++++ b/bus/check.c +@@ -26,7 +26,7 @@ + #include "check.h" + #include "connection.h" + #include "dispatch.h" +-#include "cynara.h" ++#include "cynagora-check.h" + #include "utils.h" + #include <dbus/dbus-connection-internal.h> + #include <dbus/dbus-message-internal.h> +@@ -38,7 +38,7 @@ typedef struct BusCheck + int refcount; + + BusContext *context; +- BusCynara *cynara; ++ BusCynagora *cynagora; + } BusCheck; + + typedef struct BusDeferredMessage +@@ -81,7 +81,7 @@ bus_check_new (BusContext *context, DBusError *error) + + check->refcount = 1; + check->context = context; +- check->cynara = bus_cynara_new(check, error); ++ check->cynagora = bus_cynagora_new(check, error); + if (dbus_error_is_set(error)) + { + dbus_message_free_data_slot(&deferred_message_data_slot); +@@ -110,7 +110,7 @@ bus_check_unref (BusCheck *check) + + if (check->refcount == 0) + { +- bus_cynara_unref(check->cynara); ++ bus_cynagora_unref(check->cynagora); + dbus_message_free_data_slot(&deferred_message_data_slot); + dbus_free(check); + } +@@ -122,10 +122,10 @@ bus_check_get_context (BusCheck *check) + return check->context; + } + +-BusCynara * +-bus_check_get_cynara (BusCheck *check) ++BusCynagora * ++bus_check_get_cynagora (BusCheck *check) + { +- return check->cynara; ++ return check->cynagora; + } + + static void +@@ -276,8 +276,8 @@ bus_check_privilege (BusCheck *check, + { + BusDeferredMessage *previous_deferred_message; + BusResult result = BUS_RESULT_FALSE; +-#ifdef DBUS_ENABLE_CYNARA +- BusCynara *cynara; ++#ifdef DBUS_ENABLE_CYNAGORA ++ BusCynagora *cynagora; + #endif + DBusConnection *connection; + +@@ -304,7 +304,7 @@ bus_check_privilege (BusCheck *check, + * Message has been deferred due to receive or own rule which means that sending this message + * is allowed - it must have been checked previously. + * This might happen when client calls RequestName method which depending on security +- * policy might result in both "can_send" and "can_own" Cynara checks. ++ * policy might result in both "can_send" and "can_own" Cynagora checks. + */ + result = BUS_RESULT_TRUE; + } +@@ -327,9 +327,9 @@ bus_check_privilege (BusCheck *check, + else + { + /* ask policy checkers */ +-#ifdef DBUS_ENABLE_CYNARA +- cynara = bus_check_get_cynara(check); +- result = bus_cynara_check_privilege(cynara, message, sender, addressed_recipient, ++#ifdef DBUS_ENABLE_CYNAGORA ++ cynagora = bus_check_get_cynagora(check); ++ result = bus_cynagora_check_privilege(cynagora, message, sender, addressed_recipient, + proposed_recipient, privilege, check_type, deferred_message); + #endif + if (result == BUS_RESULT_LATER && deferred_message != NULL) +diff --git a/bus/check.h b/bus/check.h +index d718a69..ab63c18 100644 +--- a/bus/check.h ++++ b/bus/check.h +@@ -45,7 +45,7 @@ BusCheck *bus_check_ref (BusCheck *check); + void bus_check_unref (BusCheck *check); + + BusContext *bus_check_get_context (BusCheck *check); +-BusCynara *bus_check_get_cynara (BusCheck *check); ++BusCynagora *bus_check_get_cynagora (BusCheck *check); + BusResult bus_check_privilege (BusCheck *check, + DBusMessage *message, + DBusConnection *sender, +diff --git a/bus/connection.c b/bus/connection.c +index b520d57..48910e0 100644 +--- a/bus/connection.c ++++ b/bus/connection.c +@@ -38,10 +38,6 @@ + #include <dbus/dbus-connection-internal.h> + #include <dbus/dbus-internals.h> + #include <dbus/dbus-message-internal.h> +-#ifdef DBUS_ENABLE_CYNARA +-#include <stdlib.h> +-#include <cynara-session.h> +-#endif + + /* Trim executed commands to this length; we want to keep logs readable */ + #define MAX_LOG_COMMAND_LEN 50 +@@ -124,9 +120,6 @@ typedef struct + + /** non-NULL if and only if this is a monitor */ + DBusList *link_in_monitors; +-#ifdef DBUS_ENABLE_CYNARA +- char *cynara_session_id; +-#endif + } BusConnectionData; + + static dbus_bool_t bus_pending_reply_expired (BusExpireList *list, +@@ -461,10 +454,6 @@ free_connection_data (void *data) + + dbus_free (d->name); + +-#ifdef DBUS_ENABLE_CYNARA +- free (d->cynara_session_id); +-#endif +- + dbus_free (d); + } + +@@ -1095,22 +1084,6 @@ bus_connection_get_policy (DBusConnection *connection) + return d->policy; + } + +-#ifdef DBUS_ENABLE_CYNARA +-const char *bus_connection_get_cynara_session_id (DBusConnection *connection) +-{ +- BusConnectionData *d = BUS_CONNECTION_DATA (connection); +- _dbus_assert (d != NULL); +- +- if (d->cynara_session_id == NULL) +- { +- unsigned long pid; +- if (dbus_connection_get_unix_process_id(connection, &pid)) +- d->cynara_session_id = cynara_session_from_pid(pid); +- } +- return d->cynara_session_id; +-} +-#endif +- + static dbus_bool_t + foreach_active (BusConnections *connections, + BusConnectionForeachFunction function, +diff --git a/bus/connection.h b/bus/connection.h +index 6af7bf1..3116bcf 100644 +--- a/bus/connection.h ++++ b/bus/connection.h +@@ -138,9 +138,6 @@ dbus_bool_t bus_connection_be_monitor (DBusConnection *connection, + BusTransaction *transaction, + DBusList **rules, + DBusError *error); +-#ifdef DBUS_ENABLE_CYNARA +-const char *bus_connection_get_cynara_session_id (DBusConnection *connection); +-#endif + + /* transaction API so we can send or not send a block of messages as a whole */ + +diff --git a/bus/cynagora-check.c b/bus/cynagora-check.c +new file mode 100644 +index 0000000..6c0c635 +--- /dev/null ++++ b/bus/cynagora-check.c +@@ -0,0 +1,330 @@ ++/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ ++/* cynagora.c Cynagora runtime privilege checking ++ * ++ * Copyright (c) 2014 Samsung Electronics, Ltd. ++ * ++ * Licensed under the Academic Free License version 2.1 ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ * ++ * This program 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 General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA ++ * ++ */ ++ ++#include <config.h> ++#include "cynagora-check.h" ++#include "check.h" ++#include "utils.h" ++ ++#include <stdlib.h> ++#include <stdio.h> ++#include <errno.h> ++ ++#include <dbus/dbus.h> ++#include <dbus/dbus-watch.h> ++#include <dbus/dbus-connection-internal.h> ++#include <bus/connection.h> ++ ++#ifndef DBUS_ENABLE_CYNAGORA ++ ++BusCynagora * ++bus_cynagora_new(BusCheck *check, DBusError *error) ++{ ++ return NULL; ++} ++ ++BusCynagora * ++bus_cynagora_ref (BusCynagora *cynagora) ++{ ++ return NULL; ++} ++ ++void ++bus_cynagora_unref (BusCynagora *cynagora) ++{ ++} ++ ++BusResult ++bus_cynagora_check_privilege (BusCynagora *cynagora, ++ DBusMessage *message, ++ DBusConnection *sender, ++ DBusConnection *addressed_recipient, ++ DBusConnection *proposed_recipient, ++ const char *privilege, ++ BusDeferredMessageStatus check_type, ++ BusDeferredMessage **deferred_message_param) ++{ ++ return BUS_RESULT_FALSE; ++} ++ ++#endif ++ ++#ifdef DBUS_ENABLE_CYNAGORA ++ ++#include <time.h> ++#include <sys/epoll.h> ++ ++#include <cynagora.h> ++ ++#ifndef CYNAGORA_CACHE_SIZE ++#define CYNAGORA_CACHE_SIZE 8000 ++#endif ++ ++typedef struct BusCynagora ++{ ++ int refcount; ++ ++ BusContext *context; ++ BusCheck *check; ++ cynagora_t *cynagora; ++ DBusWatch *cynagora_watch; ++} BusCynagora; ++ ++static int async_callback(void *closure, ++ int op, ++ int fd, ++ uint32_t events); ++ ++BusCynagora * ++bus_cynagora_new(BusCheck *check, DBusError *error) ++{ ++ BusContext *context; ++ BusCynagora *cynagora; ++ int ret; ++ ++ cynagora = dbus_new(BusCynagora, 1); ++ if (cynagora == NULL) ++ { ++ BUS_SET_OOM(error); ++ return NULL; ++ } ++ ++ context = bus_check_get_context(check); ++ ++ cynagora->refcount = 1; ++ cynagora->check = check; ++ cynagora->context = context; ++ cynagora->cynagora_watch = NULL; ++ ++ ret = cynagora_create(&cynagora->cynagora, cynagora_Check, CYNAGORA_CACHE_SIZE, NULL); ++ if (ret < 0) ++ { ++ dbus_set_error (error, DBUS_ERROR_FAILED, "Failed to create Cynagora configuration"); ++ } ++ else ++ { ++ ret = cynagora_async_setup(cynagora->cynagora, async_callback, cynagora); ++ if (ret < 0) ++ { ++ dbus_set_error (error, DBUS_ERROR_FAILED, "Failed to initialize Cynagora client"); ++ } ++ else ++ { ++ return cynagora; ++ } ++ cynagora_destroy(cynagora->cynagora); ++ } ++ ++ dbus_free(cynagora); ++ return NULL; ++} ++ ++BusCynagora * ++bus_cynagora_ref (BusCynagora *cynagora) ++{ ++ _dbus_assert (cynagora->refcount > 0); ++ cynagora->refcount += 1; ++ ++ return cynagora; ++} ++ ++void ++bus_cynagora_unref (BusCynagora *cynagora) ++{ ++ _dbus_assert (cynagora->refcount > 0); ++ ++ cynagora->refcount -= 1; ++ ++ if (cynagora->refcount == 0) ++ { ++ cynagora_destroy(cynagora->cynagora); ++ dbus_free(cynagora); ++ } ++} ++ ++static void ++async_check_callback (void *closure, int status) ++{ ++ BusDeferredMessage *deferred_message = closure; ++ BusResult result; ++ ++ if (deferred_message == NULL) ++ return; ++ ++ if (status == 1) ++ result = BUS_RESULT_TRUE; ++ else ++ result = BUS_RESULT_FALSE; ++ ++ bus_deferred_message_response_received(deferred_message, result); ++ bus_deferred_message_unref(deferred_message); ++} ++ ++BusResult ++bus_cynagora_check_privilege (BusCynagora *cynagora, ++ DBusMessage *message, ++ DBusConnection *sender, ++ DBusConnection *addressed_recipient, ++ DBusConnection *proposed_recipient, ++ const char *permission, ++ BusDeferredMessageStatus check_type, ++ BusDeferredMessage **deferred_message_param) ++{ ++ int result; ++ unsigned long uid; ++ unsigned long pid; ++ char *label; ++ char user[32]; ++ char session[32]; ++ DBusConnection *connection = check_type == BUS_DEFERRED_MESSAGE_CHECK_RECEIVE ? proposed_recipient : sender; ++ BusDeferredMessage *deferred_message; ++ BusResult ret; ++ cynagora_key_t key; ++ ++ _dbus_assert(connection != NULL); ++ ++ if (dbus_connection_get_unix_user(connection, &uid) == FALSE) ++ return BUS_RESULT_FALSE; ++ ++ if (dbus_connection_get_unix_process_id(connection, &pid) == FALSE) ++ return BUS_RESULT_FALSE; ++ ++ if (_dbus_connection_get_linux_security_label(connection, &label) == FALSE || label == NULL) ++ { ++ _dbus_warn("Failed to obtain security label for connection\n"); ++ return BUS_RESULT_FALSE; ++ } ++ ++ snprintf(user, sizeof(user), "%lu", uid); ++ snprintf(session, sizeof(session), "%lu", pid); ++ ++ key.client = label; ++ key.session = session; ++ key.user = user; ++ key.permission = permission; ++ ++ result = cynagora_cache_check(cynagora->cynagora, &key); ++ switch (result) ++ { ++ case 1: ++ _dbus_verbose("Cynagora: got ALLOWED answer from cache (client=%s session_id=%s user=%s permission=%s)\n", ++ label, session_id, user, permission); ++ ret = BUS_RESULT_TRUE; ++ break; ++ ++ case 0: ++ _dbus_verbose("Cynagora: got DENIED answer from cache (client=%s session_id=%s user=%s permission=%s)\n", ++ label, session_id, user, permission); ++ ret = BUS_RESULT_FALSE; ++ break; ++ ++ default: ++ deferred_message = bus_deferred_message_new(message, sender, addressed_recipient, ++ proposed_recipient, BUS_RESULT_LATER); ++ if (deferred_message == NULL) ++ { ++ _dbus_verbose("Failed to allocate memory for deferred message\n"); ++ ret = BUS_RESULT_FALSE; ++ goto out; ++ } ++ ++ /* callback is supposed to unref deferred_message*/ ++ result = cynagora_async_check(cynagora->cynagora, &key, 1, 0, async_check_callback, deferred_message); ++ if (result == 0) ++ { ++ _dbus_verbose("Created Cynagora request: client=%s session_id=%s user=%s permission=%s " ++ "deferred_message=%p\n", label, session_id, user, permission, deferred_message); ++ if (deferred_message_param != NULL) ++ *deferred_message_param = deferred_message; ++ ret = BUS_RESULT_LATER; ++ } ++ else ++ { ++ _dbus_verbose("Error on cynagora request create: %i\n", result); ++ bus_deferred_message_unref(deferred_message); ++ ret = BUS_RESULT_FALSE; ++ } ++ break; ++ } ++out: ++ dbus_free(label); ++ return ret; ++} ++ ++static dbus_bool_t ++watch_handler_callback(DBusWatch *watch, ++ unsigned int flags, ++ void *data) ++{ ++ BusCynagora *cynagora = (BusCynagora *)data; ++ int result = cynagora_async_process(cynagora->cynagora); ++ if (result < 0) ++ _dbus_verbose("cynagora_async_process returned %d\n", result); ++ ++ return result != -ENOMEM ? TRUE : FALSE; ++} ++ ++static int ++async_callback(void *closure, int op, int fd, uint32_t events) ++{ ++ BusCynagora *cynagora = (BusCynagora *)closure; ++ DBusLoop *loop = bus_context_get_loop(cynagora->context); ++ unsigned int flags; ++ DBusWatch *watch; ++ ++ /* compute flags */ ++ flags = 0; ++ if (events & EPOLLIN) ++ flags |= DBUS_WATCH_READABLE; ++ if (events & EPOLLOUT) ++ flags |= DBUS_WATCH_WRITABLE; ++ ++ /* remove the watch if needed */ ++ watch = cynagora->cynagora_watch; ++ if (watch != NULL) ++ { ++ cynagora->cynagora_watch = NULL; ++ _dbus_loop_remove_watch(loop, watch); ++ _dbus_watch_invalidate(watch); ++ _dbus_watch_unref(watch); ++ } ++ ++ /* create the watch if needed */ ++ watch = cynagora->cynagora_watch; ++ if (op != EPOLL_CTL_DEL) ++ { ++ watch = _dbus_watch_new(fd, flags, TRUE, watch_handler_callback, cynagora, NULL); ++ if (watch == NULL) ++ return -ENOMEM; ++ if (_dbus_loop_add_watch(loop, watch) != TRUE) ++ { ++ _dbus_watch_invalidate(watch); ++ _dbus_watch_unref(watch); ++ return -ENOMEM; ++ } ++ cynagora->cynagora_watch = watch; ++ } ++ return 0; ++} ++ ++#endif /* DBUS_ENABLE_CYNAGORA */ +diff --git a/bus/cynara.h b/bus/cynagora-check.h +similarity index 81% +rename from bus/cynara.h +rename to bus/cynagora-check.h +index c4728bb..c0892c3 100644 +--- a/bus/cynara.h ++++ b/bus/cynagora-check.h +@@ -1,5 +1,5 @@ + /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ +-/* cynara.h Cynara runtime privilege checking ++/* cynagora.h Cynagora runtime privilege checking + * + * Copyright (c) 2014 Samsung Electronics, Ltd. + * +@@ -24,10 +24,10 @@ + #include "bus.h" + #include "check.h" + +-BusCynara *bus_cynara_new (BusCheck *check, DBusError *error); +-BusCynara *bus_cynara_ref (BusCynara *cynara); +-void bus_cynara_unref (BusCynara *cynara); +-BusResult bus_cynara_check_privilege (BusCynara *cynara, ++BusCynagora *bus_cynagora_new (BusCheck *check, DBusError *error); ++BusCynagora *bus_cynagora_ref (BusCynagora *cynagora); ++void bus_cynagora_unref (BusCynagora *cynagora); ++BusResult bus_cynagora_check_privilege (BusCynagora *cynagora, + DBusMessage *message, + DBusConnection *sender, + DBusConnection *addressed_recipient, +diff --git a/bus/cynara.c b/bus/cynara.c +deleted file mode 100644 +index 77aed62..0000000 +--- a/bus/cynara.c ++++ /dev/null +@@ -1,373 +0,0 @@ +-/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ +-/* cynara.c Cynara runtime privilege checking +- * +- * Copyright (c) 2014 Samsung Electronics, Ltd. +- * +- * Licensed under the Academic Free License version 2.1 +- * +- * This program is free software; you can redistribute it and/or modify +- * it under the terms of the GNU General Public License as published by +- * the Free Software Foundation; either version 2 of the License, or +- * (at your option) any later version. +- * +- * This program 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 General Public License for more details. +- * +- * You should have received a copy of the GNU General Public License +- * along with this program; if not, write to the Free Software +- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA +- * +- */ +- +-#include <config.h> +-#include "cynara.h" +-#include "check.h" +-#include "utils.h" +- +-#include <stdio.h> +- +-#include <dbus/dbus.h> +-#include <dbus/dbus-watch.h> +-#include <dbus/dbus-connection-internal.h> +-#include <bus/connection.h> +-#ifdef DBUS_ENABLE_CYNARA +-#include <cynara-client-async.h> +-#endif +- +-#ifdef DBUS_ENABLE_CYNARA +-typedef struct BusCynara +-{ +- int refcount; +- +- BusContext *context; +- BusCheck *check; +- cynara_async *cynara; +- DBusWatch *cynara_watch; +-} BusCynara; +- +-#define USE_CYNARA_CACHE 1 +-#ifdef USE_CYNARA_CACHE +-#define CYNARA_CACHE_SIZE 1000 +-#endif +- +-static dbus_bool_t bus_cynara_watch_callback(DBusWatch *watch, +- unsigned int flags, +- void *data); +- +-static void status_callback(int old_fd, +- int new_fd, +- cynara_async_status status, +- void *user_status_data); +-static void bus_cynara_check_response_callback (cynara_check_id check_id, +- cynara_async_call_cause cause, +- int response, +- void *user_response_data); +-#endif +- +- +-BusCynara * +-bus_cynara_new(BusCheck *check, DBusError *error) +-{ +-#ifdef DBUS_ENABLE_CYNARA +- BusContext *context; +- BusCynara *cynara; +- cynara_async_configuration *conf = NULL; +- int ret; +- +- cynara = dbus_new(BusCynara, 1); +- if (cynara == NULL) +- { +- BUS_SET_OOM(error); +- return NULL; +- } +- +- context = bus_check_get_context(check); +- +- cynara->refcount = 1; +- cynara->check = check; +- cynara->context = context; +- cynara->cynara_watch = NULL; +- +- ret = cynara_async_configuration_create(&conf); +- if (ret != CYNARA_API_SUCCESS) +- { +- dbus_set_error (error, DBUS_ERROR_FAILED, "Failed to create Cynara configuration"); +- goto out; +- } +- +-#ifdef CYNARA_CACHE_SIZE +- ret = cynara_async_configuration_set_cache_size(conf, CYNARA_CACHE_SIZE); +- if (ret != CYNARA_API_SUCCESS) +- { +- dbus_set_error (error, DBUS_ERROR_FAILED, "Failed to Cynara cache size"); +- goto out; +- } +-#endif +- +- ret = cynara_async_initialize(&cynara->cynara, conf, &status_callback, cynara); +- if (ret != CYNARA_API_SUCCESS) +- { +- dbus_set_error (error, DBUS_ERROR_FAILED, "Failed to initialize Cynara client"); +- goto out; +- } +- +-out: +- cynara_async_configuration_destroy(conf); +- if (ret != CYNARA_API_SUCCESS) +- { +- dbus_free(cynara); +- return NULL; +- } +- +- return cynara; +-#else +- return NULL; +-#endif +-} +- +-BusCynara * +-bus_cynara_ref (BusCynara *cynara) +-{ +-#ifdef DBUS_ENABLE_CYNARA +- _dbus_assert (cynara->refcount > 0); +- cynara->refcount += 1; +- +- return cynara; +-#else +- return NULL; +-#endif +-} +- +-void +-bus_cynara_unref (BusCynara *cynara) +-{ +-#ifdef DBUS_ENABLE_CYNARA +- _dbus_assert (cynara->refcount > 0); +- +- cynara->refcount -= 1; +- +- if (cynara->refcount == 0) +- { +- cynara_async_finish(cynara->cynara); +- dbus_free(cynara); +- } +-#endif +-} +- +-BusResult +-bus_cynara_check_privilege (BusCynara *cynara, +- DBusMessage *message, +- DBusConnection *sender, +- DBusConnection *addressed_recipient, +- DBusConnection *proposed_recipient, +- const char *privilege, +- BusDeferredMessageStatus check_type, +- BusDeferredMessage **deferred_message_param) +-{ +-#ifdef DBUS_ENABLE_CYNARA +- int result; +- unsigned long uid; +- char *label; +- const char *session_id; +- char user[32]; +- cynara_check_id check_id; +- DBusConnection *connection = check_type == BUS_DEFERRED_MESSAGE_CHECK_RECEIVE ? proposed_recipient : sender; +- BusDeferredMessage *deferred_message; +- BusResult ret; +- +- _dbus_assert(connection != NULL); +- +- if (dbus_connection_get_unix_user(connection, &uid) == FALSE) +- return BUS_RESULT_FALSE; +- +- if (_dbus_connection_get_linux_security_label(connection, &label) == FALSE || label == NULL) +- { +- _dbus_warn("Failed to obtain security label for connection\n"); +- return BUS_RESULT_FALSE; +- } +- +- session_id = bus_connection_get_cynara_session_id (connection); +- if (session_id == NULL) +- { +- ret = BUS_RESULT_FALSE; +- goto out; +- } +- +- snprintf(user, sizeof(user), "%lu", uid); +- +-#if USE_CYNARA_CACHE +- result = cynara_async_check_cache(cynara->cynara, label, session_id, user, privilege); +-#else +- result = CYNARA_API_CACHE_MISS; +-#endif +- +- switch (result) +- { +- case CYNARA_API_ACCESS_ALLOWED: +- _dbus_verbose("Cynara: got ALLOWED answer from cache (client=%s session_id=%s user=%s privilege=%s)\n", +- label, session_id, user, privilege); +- ret = BUS_RESULT_TRUE; +- break; +- +- case CYNARA_API_ACCESS_DENIED: +- _dbus_verbose("Cynara: got DENIED answer from cache (client=%s session_id=%s user=%s privilege=%s)\n", +- label, session_id, user, privilege); +- ret = BUS_RESULT_FALSE; +- break; +- +- case CYNARA_API_CACHE_MISS: +- deferred_message = bus_deferred_message_new(message, sender, addressed_recipient, +- proposed_recipient, BUS_RESULT_LATER); +- if (deferred_message == NULL) +- { +- _dbus_verbose("Failed to allocate memory for deferred message\n"); +- ret = BUS_RESULT_FALSE; +- goto out; +- } +- +- /* callback is supposed to unref deferred_message*/ +- result = cynara_async_create_request(cynara->cynara, label, session_id, user, privilege, &check_id, +- &bus_cynara_check_response_callback, deferred_message); +- if (result == CYNARA_API_SUCCESS) +- { +- _dbus_verbose("Created Cynara request: client=%s session_id=%s user=%s privilege=%s check_id=%u " +- "deferred_message=%p\n", label, session_id, user, privilege, (unsigned int)check_id, deferred_message); +- if (deferred_message_param != NULL) +- *deferred_message_param = deferred_message; +- ret = BUS_RESULT_LATER; +- } +- else +- { +- _dbus_verbose("Error on cynara request create: %i\n", result); +- bus_deferred_message_unref(deferred_message); +- ret = BUS_RESULT_FALSE; +- } +- break; +- default: +- _dbus_verbose("Error when accessing Cynara cache: %i\n", result); +- ret = BUS_RESULT_FALSE; +- } +-out: +- dbus_free(label); +- return ret; +- +-#else +- return BUS_RESULT_FALSE; +-#endif +-} +- +- +- +-#ifdef DBUS_ENABLE_CYNARA +-static void +-status_callback(int old_fd, int new_fd, cynara_async_status status, +- void *user_status_data) +-{ +- BusCynara *cynara = (BusCynara *)user_status_data; +- DBusLoop *loop = bus_context_get_loop(cynara->context); +- +- if (cynara->cynara_watch != NULL) +- { +- _dbus_loop_remove_watch(loop, cynara->cynara_watch); +- _dbus_watch_invalidate(cynara->cynara_watch); +- _dbus_watch_unref(cynara->cynara_watch); +- cynara->cynara_watch = NULL; +- } +- +- if (new_fd != -1) +- { +- unsigned int flags; +- DBusWatch *watch; +- +- switch (status) +- { +- case CYNARA_STATUS_FOR_READ: +- flags = DBUS_WATCH_READABLE; +- break; +- case CYNARA_STATUS_FOR_RW: +- flags = DBUS_WATCH_READABLE | DBUS_WATCH_WRITABLE; +- break; +- default: +- /* Cynara passed unknown status - warn and add RW watch */ +- _dbus_verbose("Cynara passed unknown status value: 0x%08X\n", (unsigned int)status); +- flags = DBUS_WATCH_READABLE | DBUS_WATCH_WRITABLE; +- break; +- } +- +- watch = _dbus_watch_new(new_fd, flags, TRUE, &bus_cynara_watch_callback, cynara, NULL); +- if (watch != NULL) +- { +- if (_dbus_loop_add_watch(loop, watch) == TRUE) +- { +- cynara->cynara_watch = watch; +- return; +- } +- +- _dbus_watch_invalidate(watch); +- _dbus_watch_unref(watch); +- } +- +- /* It seems like not much can be done at this point. Cynara events won't be processed +- * until next Cynara function call triggering status callback */ +- _dbus_verbose("Failed to add dbus watch\n"); +- } +-} +- +-static dbus_bool_t +-bus_cynara_watch_callback(DBusWatch *watch, +- unsigned int flags, +- void *data) +-{ +- BusCynara *cynara = (BusCynara *)data; +- int result = cynara_async_process(cynara->cynara); +- if (result != CYNARA_API_SUCCESS) +- _dbus_verbose("cynara_async_process returned %d\n", result); +- +- return result != CYNARA_API_OUT_OF_MEMORY ? TRUE : FALSE; +-} +- +-static inline const char * +-call_cause_to_string(cynara_async_call_cause cause) +-{ +- switch (cause) +- { +- case CYNARA_CALL_CAUSE_ANSWER: +- return "ANSWER"; +- case CYNARA_CALL_CAUSE_CANCEL: +- return "CANCEL"; +- case CYNARA_CALL_CAUSE_FINISH: +- return "FINSIH"; +- case CYNARA_CALL_CAUSE_SERVICE_NOT_AVAILABLE: +- return "SERVICE NOT AVAILABLE"; +- default: +- return "INVALID"; +- } +-} +- +-static void +-bus_cynara_check_response_callback (cynara_check_id check_id, +- cynara_async_call_cause cause, +- int response, +- void *user_response_data) +-{ +- BusDeferredMessage *deferred_message = user_response_data; +- BusResult result; +- +- _dbus_verbose("Cynara callback: check_id=%u, cause=%s response=%i response_data=%p\n", +- (unsigned int)check_id, call_cause_to_string(cause), response, user_response_data); +- +- if (deferred_message == NULL) +- return; +- +- if (cause == CYNARA_CALL_CAUSE_ANSWER && response == CYNARA_API_ACCESS_ALLOWED) +- result = BUS_RESULT_TRUE; +- else +- result = BUS_RESULT_FALSE; +- +- bus_deferred_message_response_received(deferred_message, result); +- bus_deferred_message_unref(deferred_message); +-} +- +-#endif /* DBUS_ENABLE_CYNARA */ +diff --git a/bus/system.conf.in b/bus/system.conf.in +index 19d0c04..81c39c8 100644 +--- a/bus/system.conf.in ++++ b/bus/system.conf.in +@@ -72,10 +72,10 @@ + send_interface="org.freedesktop.DBus.Introspectable"/> + <allow send_destination="org.freedesktop.DBus" + send_interface="org.freedesktop.DBus.Properties"/> +- <!-- If there is a need specific bus services could be protected by Cynara as well. ++ <!-- If there is a need specific bus services could be protected by Cynagora as well. + However, this can lead to deadlock during the boot process when such check is made and +- Cynara is not yet activated (systemd calls protected method synchronously, +- dbus daemon tries to consult Cynara, Cynara waits for systemd activation). ++ Cynagora is not yet activated (systemd calls protected method synchronously, ++ dbus daemon tries to consult Cynagora, Cynagora waits for systemd activation). + Therefore it is advised to allow root processes to use bus services. + Currently anyone is allowed to talk to the message bus --> + <allow receive_sender="org.freedesktop.DBus"/> +diff --git a/configure.ac b/configure.ac +index 11b5ffd..df9341c 100644 +--- a/configure.ac ++++ b/configure.ac +@@ -1742,16 +1742,16 @@ AC_ARG_ENABLE([user-session], + AM_CONDITIONAL([DBUS_ENABLE_USER_SESSION], + [test "x$enable_user_session" = xyes]) + +-#enable cynara integration +-AC_ARG_ENABLE([cynara], [AS_HELP_STRING([--enable-cynara], [enable Cynara integration])], [], [enable_cynara=no]) +-if test "x$enable_cynara" = xyes; then +- PKG_CHECK_MODULES([CYNARA], [cynara-client-async >= 0.6.0 cynara-session >= 0.6.0], +- [AC_DEFINE([DBUS_ENABLE_CYNARA], [1], [Define to enable Cynara privilege checks in dbus-daemon])], +- [AC_MSG_ERROR([libcynara-client-async and cynara-session are required to enable Cynara integration])]) ++#enable cynagora integration ++AC_ARG_ENABLE([cynagora], [AS_HELP_STRING([--enable-cynagora], [enable Cynagora integration])], [], [enable_cynagora=no]) ++if test "x$enable_cynagora" = xyes; then ++ PKG_CHECK_MODULES([CYNAGORA], [cynagora], ++ [AC_DEFINE([DBUS_ENABLE_CYNAGORA], [1], [Define to enable Cynagora privilege checks in dbus-daemon])], ++ [AC_MSG_ERROR([libcynagora is required to enable Cynagora integration])]) + fi + +-AC_SUBST([CYNARA_CFLAGS]) +-AC_SUBST([CYNARA_LIBS]) ++AC_SUBST([CYNAGORA_CFLAGS]) ++AC_SUBST([CYNAGORA_LIBS]) + + AC_CONFIG_FILES([ + Doxyfile +@@ -1835,7 +1835,7 @@ echo " + Building bus stats API: ${enable_stats} + Building SELinux support: ${have_selinux} + Building AppArmor support: ${have_apparmor} +- Building Cynara support: ${enable_cynara} ++ Building Cynagora support: ${enable_cynagora} + Building inotify support: ${have_inotify} + Building kqueue support: ${have_kqueue} + Building systemd support: ${have_systemd} +-- +2.21.1 + diff --git a/meta-security/recipes-core/dbus-cynagora/dbus_1.12.16.bbappend b/meta-security/recipes-core/dbus-cynagora/dbus_1.12.16.bbappend new file mode 100644 index 000000000..177a117b8 --- /dev/null +++ b/meta-security/recipes-core/dbus-cynagora/dbus_1.12.16.bbappend @@ -0,0 +1,15 @@ +FILESEXTRAPATHS_prepend := "${THISDIR}/dbus-cynagora:" + +SRC_URI_append_class-target = "\ + file://0001-Integration-of-Cynara-asynchronous-security-checks.patch \ + file://0002-Disable-message-dispatching-when-send-rule-result-is.patch \ + file://0003-Handle-unavailability-of-policy-results-for-broadcas.patch \ + file://0004-Add-own-rule-result-unavailability-handling.patch \ + file://0005-Perform-Cynara-runtime-policy-checks-by-default.patch \ + file://0006-Fix-SIGSEGV-on-disconnections.patch \ + file://0007-Switch-from-cynara-to-cynagora.patch \ +" + +DEPENDS_append_class-target = " cynagora smack" +EXTRA_OECONF_append_class-target = " ${@bb.utils.contains('DISTRO_FEATURES','smack','--enable-cynagora --disable-selinux','',d)}" + |