add SELinux policy module

CMakeLists.txt

 
 option(GENERATE_SRS_SECRET "Generate a random SRS secret if none exists during install" ON)
 option(USE_APPARMOR "Enable AppArmor profile" OFF)
+option(USE_SELINUX "Enable SELinux policy module" OFF)
 
 set(CHROOT_DIR "${CMAKE_INSTALL_PREFIX}/lib/${PROJECT_NAME}" CACHE PATH "Chroot jail for daemon")
 set(SYSCONF_DIR "/etc" CACHE PATH "Global system configuration folder")
 	install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.apparmor DESTINATION "${SYSCONF_DIR}/apparmor.d" RENAME "${APPARMOR_PROFILE}")
 endif()
 
+if(USE_SELINUX)
+	file(COPY selinux/${PROJECT_NAME}.te selinux/${PROJECT_NAME}.fc DESTINATION selinux)
+	add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
+		WORKING_DIRECTORY selinux
+		COMMAND make -f /usr/share/selinux/devel/Makefile)
+	install(FILES ${CMAKE_CURRENT_BINARY_DIR}/selinux/${PROJECT_NAME}.pp
+		DESTINATION /usr/share/selinux/packages/${PROJECT_NAME})
+endif()
+
 install(TARGETS ${PROJECT_NAME} DESTINATION "sbin")
 install(FILES README.md README_UPGRADE.md main.cf.ex DESTINATION "${DOC_DIR}")
 install(SCRIPT "${CMAKE_CURRENT_BINARY_DIR}/postinstall.cmake")

selinux/postsrsd.fc

+/usr/sbin/postsrsd      gen_context(system_u:object_r:postsrsd_exec_t,s0)
+/etc/postsrsd\.secret   gen_context(system_u:object_r:postsrsd_secret_t,s0)

selinux/postsrsd.te

+policy_module(postsrsd, 1.0.0)
+
+gen_require(`
+    type http_cache_port_t;
+')
+
+type postsrsd_t;
+type postsrsd_exec_t;
+init_daemon_domain(postsrsd_t, postsrsd_exec_t)
+
+type postsrsd_secret_t;
+files_type(postsrsd_secret_t)
+
+miscfiles_read_localization(postsrsd_t)
+auth_use_nsswitch(postsrsd_t)
+logging_send_syslog_msg(postsrsd_t)
+allow postsrsd_t self:capability { setuid sys_chroot };
+# 10001 and 10002 are labelled http_cache_port_t for whatever reason,
+# no point arguing with that...
+corenet_tcp_bind_http_cache_port(postsrsd_t)
+allow postsrsd_t self:tcp_socket server_stream_socket_perms;
+allow postsrsd_t postsrsd_secret_t:file read_file_perms;