selinux-policy/policy/modules/apps/rssh.if

## <summary>Restricted (scp/sftp) only shell</summary>

#######################################
## <summary>
##	The per role template for the rssh module.
## </summary>
## <desc>
##	<p>
##	This template creates a derived domains which are used
##	for rssh client sessions.  Derived types are also created
##	for read-only and read-write file access.
##	</p>
##	<p>
##	This template is invoked automatically for each user, and
##	generally does not need to be invoked directly
##	by policy writers.
##	</p>
## </desc>
## <param name="userdomain_prefix">
##	<summary>
##	The prefix of the user domain (e.g., user
##	is the prefix for user_t).
##	</summary>
## </param>
#
template(`rssh_per_role_template',`

	##############################
	#
	# Declarations
	#

	type $1_rssh_t alias rssh_$1_t, rssh_domain_type;
	domain_type($1_rssh_t)
	domain_entry_file($1_rssh_t,rssh_exec_t)
	domain_user_exemption_target($1_t)
	domain_interactive_fd($1_rssh_t)
	role system_r types $1_rssh_t;

	type $1_rssh_devpts_t alias rssh_$1_devpts_t;
	term_user_pty($1_rssh_t,$1_rssh_devpts_t)

	type $1_rssh_ro_t alias rssh_$1_ro_t, rssh_ro_content_type;
	userdom_user_home_content($1,$1_rssh_ro_t)

	type $1_rssh_rw_t alias rssh_$1_rw_t;
	userdom_user_home_content($1,$1_rssh_rw_t)

	##############################
	#
	# Local policy
	#

	allow $1_rssh_t self:process ~{ ptrace setcurrent setexec setfscreate setrlimit execmem execstack execheap };
	allow $1_rssh_t self:fd use;
	allow $1_rssh_t self:fifo_file rw_file_perms;
	allow $1_rssh_t self:unix_dgram_socket create_socket_perms;
	allow $1_rssh_t self:unix_stream_socket create_stream_socket_perms;
	allow $1_rssh_t self:unix_dgram_socket sendto;
	allow $1_rssh_t self:unix_stream_socket connectto;
	allow $1_rssh_t self:shm create_shm_perms;
	allow $1_rssh_t self:sem create_sem_perms;
	allow $1_rssh_t self:msgq create_msgq_perms;
	allow $1_rssh_t self:msg { send receive };

	allow $1_rssh_t $1_rssh_devpts_t:chr_file { rw_file_perms setattr };
	term_create_pty($1_rssh_t,$1_rssh_devpts_t)

	allow $1_rssh_t $1_rssh_ro_t:dir list_dir_perms;
	allow $1_rssh_t $1_rssh_ro_t:file read_file_perms;

	allow $1_rssh_t $1_rssh_rw_t:dir manage_dir_perms;
	allow $1_rssh_t $1_rssh_rw_t:file manage_file_perms;

	kernel_read_system_state($1_rssh_t)
	kernel_read_kernel_sysctls($1_rssh_t)

	files_read_etc_files($1_rssh_t)
	files_read_etc_runtime_files($1_rssh_t)
	files_list_home($1_rssh_t)
	files_read_usr_files($1_rssh_t)
	files_list_var($1_rssh_t)

	fs_search_auto_mountpoints($1_rssh_t)

	libs_use_ld_so($1_rssh_t)
	libs_use_shared_libs($1_rssh_t)

	logging_send_syslog_msg($1_rssh_t)

	miscfiles_read_localization($1_rssh_t)

	userdom_use_unpriv_users_fds($1_rssh_t)

	ssh_rw_tcp_sockets($1_rssh_t)
	ssh_rw_stream_sockets($1_rssh_t)

	optional_policy(`
		nis_use_ypbind($1_rssh_t)
	')
')

########################################
## <summary>
##	Transition to all user rssh domains.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`rssh_spec_domtrans_all_users',`
	gen_require(`
		attribute rssh_domain_type;
		type rssh_exec_t;
	')

	domain_trans($1,rssh_exec_t,rssh_domain_type)
	allow rssh_domain_type $1:fd use;
	allow rssh_domain_type $1:fifo_file rw_file_perms;
	allow rssh_domain_type $1:process sigchld;
')

########################################
## <summary>
##	Read all users rssh read-only content.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`rssh_read_all_users_ro_content',`
	gen_require(`
		attribute rssh_ro_content_type;
	')

	allow $1 rssh_ro_content_type:dir r_dir_perms;
	allow $1 rssh_ro_content_type:file r_file_perms;
	allow $1 rssh_ro_content_type:lnk_file { getattr read };
')