--- /dev/null
+From 8f69153081140fa4c347ab1729c348ec77b309ec 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 1/5] 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.
+
+Change-Id: I9bcbce34577e5dc2a3cecf6233a0a2b0e43e1108
+Signed-off-by: José Bollo <jose.bollo@iot.bzh>
+---
+ bus/Makefile.am | 6 +
+ bus/bus.c | 136 +++++---
+ bus/bus.h | 32 +-
+ bus/check.c | 217 ++++++++++++
+ bus/check.h | 68 ++++
+ bus/config-parser-common.c | 6 +
+ bus/config-parser-common.h | 1 +
+ bus/config-parser.c | 71 +++-
+ bus/connection.c | 56 ++-
+ bus/connection.h | 4 +
+ bus/cynara.c | 374 +++++++++++++++++++++
+ bus/cynara.h | 37 ++
+ bus/dispatch.c | 44 ++-
+ bus/policy.c | 193 +++++++----
+ bus/policy.h | 51 ++-
+ configure.ac | 12 +
+ test/Makefile.am | 1 +
+ test/data/invalid-config-files/badcheck-1.conf | 9 +
+ test/data/invalid-config-files/badcheck-2.conf | 9 +
+ test/data/valid-config-files/check-1.conf | 9 +
+ .../valid-config-files/debug-check-some.conf.in | 18 +
+ tools/dbus-send.c | 2 +-
+ 22 files changed, 1193 insertions(+), 163 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 33af09b0..3f57cc48 100644
+--- a/bus/Makefile.am
++++ b/bus/Makefile.am
+@@ -9,6 +9,7 @@ DBUS_BUS_LIBS = \
+ $(THREAD_LIBS) \
+ $(ADT_LIBS) \
+ $(NETWORK_libs) \
++ $(CYNARA_LIBS) \
+ $(NULL)
+
+ DBUS_LAUNCHER_LIBS = \
+@@ -24,6 +25,7 @@ AM_CPPFLAGS = \
+ $(APPARMOR_CFLAGS) \
+ -DDBUS_SYSTEM_CONFIG_FILE=\""$(dbusdatadir)/system.conf"\" \
+ -DDBUS_COMPILATION \
++ $(CYNARA_CFLAGS) \
+ $(NULL)
+
+ # if assertions are enabled, improve backtraces
+@@ -82,12 +84,16 @@ BUS_SOURCES= \
+ audit.h \
+ bus.c \
+ bus.h \
++ check.c \
++ check.h \
+ config-parser.c \
+ config-parser.h \
+ config-parser-common.c \
+ 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/bus.c b/bus/bus.c
+index fd4ab9e4..c4008505 100644
+--- a/bus/bus.c
++++ b/bus/bus.c
+@@ -37,6 +37,7 @@
+ #include "apparmor.h"
+ #include "audit.h"
+ #include "dir-watch.h"
++#include "check.h"
+ #include <dbus/dbus-list.h>
+ #include <dbus/dbus-hash.h>
+ #include <dbus/dbus-credentials.h>
+@@ -65,6 +66,7 @@ struct BusContext
+ BusRegistry *registry;
+ BusPolicy *policy;
+ BusMatchmaker *matchmaker;
++ BusCheck *check;
+ BusLimits limits;
+ DBusRLimit *initial_fd_limit;
+ unsigned int fork : 1;
+@@ -988,6 +990,10 @@ 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;
+@@ -1112,6 +1118,12 @@ 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);
+@@ -1241,6 +1253,12 @@ 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)
+@@ -1456,6 +1474,7 @@ 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;
+@@ -1485,7 +1504,8 @@ 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)),
+@@ -1496,7 +1516,8 @@ 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 */
+@@ -1520,14 +1541,15 @@ 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
+-bus_context_check_security_policy (BusContext *context,
+- BusTransaction *transaction,
+- DBusConnection *sender,
+- DBusConnection *addressed_recipient,
+- DBusConnection *proposed_recipient,
+- DBusMessage *message,
+- DBusError *error)
++BusResult
++bus_context_check_security_policy (BusContext *context,
++ BusTransaction *transaction,
++ DBusConnection *sender,
++ DBusConnection *addressed_recipient,
++ DBusConnection *proposed_recipient,
++ DBusMessage *message,
++ 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);
+@@ -1564,7 +1587,7 @@ 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;
+@@ -1594,7 +1617,7 @@ bus_context_check_security_policy (BusContext *context,
+ if (dbus_error_is_set (&error2))
+ {
+ dbus_move_error (&error2, error);
+- return FALSE;
++ return BUS_RESULT_FALSE;
+ }
+ }
+ }
+@@ -1621,11 +1644,11 @@ 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
+@@ -1642,7 +1665,7 @@ bus_context_check_security_policy (BusContext *context,
+ dest ? dest : DBUS_SERVICE_DBUS,
+ src ? src : DBUS_SERVICE_DBUS,
+ error))
+- return FALSE;
++ return BUS_RESULT_FALSE;
+
+ if (!bus_connection_is_active (sender))
+ {
+@@ -1656,7 +1679,7 @@ bus_context_check_security_policy (BusContext *context,
+ {
+ _dbus_verbose ("security check allowing %s message\n",
+ "Hello");
+- return TRUE;
++ return BUS_RESULT_TRUE;
+ }
+ else
+ {
+@@ -1667,7 +1690,7 @@ 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;
+ }
+ }
+ }
+@@ -1716,20 +1739,29 @@ 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)
+ {
+@@ -1738,23 +1770,29 @@ 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 */
+@@ -1764,10 +1802,10 @@ 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
+@@ -1784,11 +1822,11 @@ 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 3fab59ff..dab7791f 100644
+--- a/bus/bus.h
++++ b/bus/bus.h
+@@ -44,6 +44,22 @@ typedef struct BusOwner BusOwner;
+ typedef struct BusTransaction BusTransaction;
+ typedef struct BusMatchmaker BusMatchmaker;
+ typedef struct BusMatchRule BusMatchRule;
++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
+ {
+@@ -97,6 +113,7 @@ 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,
+@@ -131,13 +148,14 @@ 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,
+- BusTransaction *transaction,
+- DBusConnection *sender,
+- DBusConnection *addressed_recipient,
+- DBusConnection *proposed_recipient,
+- DBusMessage *message,
+- DBusError *error);
++BusResult bus_context_check_security_policy (BusContext *context,
++ BusTransaction *transaction,
++ DBusConnection *sender,
++ DBusConnection *addressed_recipient,
++ DBusConnection *proposed_recipient,
++ DBusMessage *message,
++ 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 00000000..5b72d31c
+--- /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 00000000..c3fcaf90
+--- /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 5db6b289..ea25f5e6 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 382a0141..9e026d10 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.c b/bus/config-parser.c
+index d9f6042c..a8c4ca5d 100644
+--- a/bus/config-parser.c
++++ b/bus/config-parser.c
+@@ -1172,7 +1172,7 @@ 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;
+@@ -1195,6 +1195,7 @@ append_rule_from_element (BusConfigParser *parser,
+ const char *own_prefix;
+ const char *user;
+ const char *group;
++ const char *privilege;
+
+ BusPolicyRule *rule;
+
+@@ -1222,6 +1223,7 @@ append_rule_from_element (BusConfigParser *parser,
+ "user", &user,
+ "group", &group,
+ "log", &log,
++ "privilege", &privilege,
+ NULL))
+ return FALSE;
+
+@@ -1230,6 +1232,7 @@ append_rule_from_element (BusConfigParser *parser,
+ receive_interface || receive_member || receive_error || receive_sender ||
+ receive_type || receive_path || eavesdrop ||
+ send_requested_reply || receive_requested_reply ||
++ privilege ||
+ own || own_prefix || user || group))
+ {
+ dbus_set_error (error, DBUS_ERROR_FAILED,
+@@ -1246,7 +1249,30 @@ 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:
+@@ -1420,7 +1446,7 @@ append_rule_from_element (BusConfigParser *parser,
+ 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;
+
+@@ -1502,7 +1528,7 @@ append_rule_from_element (BusConfigParser *parser,
+ 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;
+
+@@ -1532,7 +1558,7 @@ 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;
+
+@@ -1558,7 +1584,7 @@ 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;
+
+@@ -1573,7 +1599,7 @@ 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;
+
+@@ -1590,7 +1616,7 @@ 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;
+
+@@ -1605,7 +1631,7 @@ 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;
+
+@@ -1629,6 +1655,10 @@ 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:
+@@ -1703,7 +1733,7 @@ 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)
+@@ -1718,7 +1748,7 @@ 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)
+@@ -1727,6 +1757,21 @@ 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
+@@ -2088,6 +2133,7 @@ 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:
+@@ -2397,6 +2443,7 @@ 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:
+@@ -2862,6 +2909,8 @@ 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);
+diff --git a/bus/connection.c b/bus/connection.c
+index 02d6c220..eea50ecd 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
+@@ -451,6 +458,10 @@ free_connection_data (void *data)
+
+ dbus_free (d->name);
+
++#ifdef DBUS_ENABLE_CYNARA
++ free (d->cynara_session_id);
++#endif
++
+ dbus_free (d);
+ }
+
+@@ -1063,6 +1074,22 @@ 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,
+@@ -2289,6 +2316,7 @@ 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
+@@ -2326,9 +2354,11 @@ 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, &error))
++ res = bus_context_check_security_policy (bus_transaction_get_context (transaction),
++ transaction,
++ NULL, connection, connection, message, &error,
++ NULL);
++ if (res == BUS_RESULT_FALSE)
+ {
+ if (!bus_transaction_capture_error_reply (transaction, &error, message))
+ {
+@@ -2342,6 +2372,12 @@ 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 8c68d0a0..a6e5dfde 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);
+@@ -122,6 +123,9 @@ 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 00000000..57a4c45c
+--- /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 00000000..c4728bb7
+--- /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 edfa1b44..05be3bdf 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"
+@@ -64,13 +65,17 @@ 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,
+- &stack_error))
++ &stack_error,
++ &deferred_message);
++ if (result != BUS_RESULT_TRUE)
+ {
+ if (!bus_transaction_capture_error_reply (transaction, &stack_error,
+ message))
+@@ -129,6 +134,7 @@ bus_dispatch_matches (BusTransaction *transaction,
+ BusMatchmaker *matchmaker;
+ DBusList *link;
+ BusContext *context;
++ BusDeferredMessage *deferred_message;
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+@@ -144,11 +150,21 @@ 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, error))
++ BusResult res;
++ res = bus_context_check_security_policy (context, transaction,
++ sender, addressed_recipient,
++ addressed_recipient,
++ message, 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,
+@@ -379,12 +395,24 @@ bus_dispatch (DBusConnection *connection,
+ if (service_name &&
+ strcmp (service_name, DBUS_SERVICE_DBUS) == 0) /* to bus driver */
+ {
+- if (!bus_context_check_security_policy (context, transaction,
+- connection, NULL, NULL, message, &error))
++ BusDeferredMessage *deferred_message;
++ BusResult res;
++ res = bus_context_check_security_policy (context, transaction,
++ connection, NULL, NULL, message, &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/policy.c b/bus/policy.c
+index 082f3853..bcade176 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"
+@@ -32,7 +33,7 @@
+
+ BusPolicyRule*
+ bus_policy_rule_new (BusPolicyRuleType type,
+- dbus_bool_t allow)
++ BusPolicyRuleAccess access)
+ {
+ BusPolicyRule *rule;
+
+@@ -42,7 +43,7 @@ bus_policy_rule_new (BusPolicyRuleType type,
+
+ rule->type = type;
+ rule->refcount = 1;
+- rule->allow = allow;
++ rule->access = access;
+
+ switch (rule->type)
+ {
+@@ -54,18 +55,19 @@ 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;
+@@ -117,7 +119,8 @@ bus_policy_rule_unref (BusPolicyRule *rule)
+ case BUS_POLICY_RULE_GROUP:
+ break;
+ }
+-
++
++ dbus_free (rule->privilege);
+ dbus_free (rule);
+ }
+ }
+@@ -427,7 +430,10 @@ 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;
+@@ -862,18 +868,23 @@ 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
+ */
+@@ -881,7 +892,7 @@ 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)
+ {
+@@ -912,13 +923,14 @@ 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;
+ }
+
+@@ -926,7 +938,7 @@ 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;
+@@ -949,13 +961,15 @@ 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))
+@@ -1029,33 +1043,63 @@ 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:
++ 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 &&
+@@ -1068,7 +1112,7 @@ 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)
+ {
+@@ -1091,19 +1135,21 @@ 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;
+@@ -1112,13 +1158,14 @@ 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;
+ }
+
+@@ -1126,7 +1173,7 @@ 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;
+@@ -1149,13 +1196,13 @@ 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))
+@@ -1230,14 +1277,42 @@ 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:
++ 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;
+ }
+
+
+@@ -1289,7 +1364,7 @@ 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 d1d3e72b..e9f193af 100644
+--- a/bus/policy.h
++++ b/bus/policy.h
+@@ -39,6 +39,14 @@ typedef enum
+ BUS_POLICY_RULE_GROUP
+ } BusPolicyRuleType;
+
++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))
+@@ -49,8 +57,9 @@ 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
+@@ -106,7 +115,7 @@ 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);
+
+@@ -140,21 +149,27 @@ 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,
+- BusRegistry *registry,
+- dbus_bool_t requested_reply,
+- DBusConnection *receiver,
+- DBusMessage *message,
+- dbus_int32_t *toggles,
+- dbus_bool_t *log);
+-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_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);
++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);
+ 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 71e3515c..f3a2ffc1 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -1873,6 +1873,17 @@ 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
+@@ -1952,6 +1963,7 @@ 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 914dd7f2..86882537 100644
+--- a/test/Makefile.am
++++ b/test/Makefile.am
+@@ -341,6 +341,7 @@ 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/multi-user.conf.in \
+ data/valid-config-files/systemd-activation.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 00000000..fad9f502
+--- /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 00000000..63c7ef25
+--- /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 00000000..ad714733
+--- /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 00000000..47ee8548
+--- /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>
+diff --git a/tools/dbus-send.c b/tools/dbus-send.c
+index 0dc1f5b3..76ddab3f 100644
+--- a/tools/dbus-send.c
++++ b/tools/dbus-send.c
+@@ -458,7 +458,7 @@ main (int argc, char *argv[])
+ char *arg;
+ char *c;
+ int type;
+- int secondary_type;
++ int secondary_type = 0;
+ int container_type;
+ DBusMessageIter *target_iter;
+ DBusMessageIter container_iter;
+--
+2.14.3
+
Code Review / AGL / meta-agl.git / blobdiff