policy_module(ssh,1.3.0)

########################################

#

# Declarations

#

attribute ssh_server;

# ssh client executable.

type ssh_exec_t;

files_type(ssh_exec_t)

type ssh_keygen_exec_t;

files_type(ssh_keygen_exec_t)

type ssh_keysign_exec_t;

files_type(ssh_keysign_exec_t)

# real declaration moved to mls until

# range_transition works in loadable modules

gen_require(`

	type sshd_exec_t;

')

files_type(sshd_exec_t)

type sshd_key_t;

files_type(sshd_key_t)

ifdef(`targeted_policy',`

	unconfined_alias_domain(sshd_t)

	init_system_domain(sshd_t,sshd_exec_t)

	type sshd_var_run_t;

	files_type(sshd_var_run_t)

	# FIXME

	typeattribute ssh_exec_t entry_type;

	typeattribute ssh_keygen_exec_t entry_type;

	typeattribute ssh_keysign_exec_t entry_type;

',`

	# Type for the ssh-agent executable.

	type ssh_agent_exec_t;

	files_type(ssh_agent_exec_t)

	type ssh_keygen_t;

	init_system_domain(ssh_keygen_t,ssh_keygen_exec_t)

	role system_r types ssh_keygen_t;

	ssh_server_template(sshd)

	ssh_server_template(sshd_extern)

	# cjp: commenting this out until typeattribute works in a conditional

#	optional_policy(`inetd',`

#		tunable_policy(`run_ssh_inetd',`

#			inetd_tcp_service_domain(sshd_t,sshd_exec_t)

#		',`

#			init_daemon_domain(sshd_t,sshd_exec_t)

#		')

#	',`

		# These rules should match the else block

		# of the run_ssh_inetd tunable directly above

		init_daemon_domain(sshd_t,sshd_exec_t)

#	')

	type sshd_tmp_t;

	files_tmp_file(sshd_tmp_t)

')

#################################

#

# sshd local policy

#

# sshd_t is the domain for the sshd program.

#

ifdef(`targeted_policy',`',`

	# so a tunnel can point to another ssh tunnel

	allow sshd_t self:tcp_socket { acceptfrom connectto recvfrom };

	allow sshd_t sshd_tmp_t:dir create_dir_perms;

	allow sshd_t sshd_tmp_t:file create_file_perms;

	allow sshd_t sshd_tmp_t:sock_file create_file_perms;

	files_tmp_filetrans(sshd_t, sshd_tmp_t, { dir file sock_file })

	# for X forwarding

	corenet_tcp_bind_xserver_port(sshd_t)

	mls_file_read_up(sshd_t)

	mls_file_write_down(sshd_t)

	mls_file_upgrade(sshd_t)

	mls_file_downgrade(sshd_t)

	mls_process_set_level(sshd_t)

	auth_exec_pam(sshd_t)

	seutil_read_config(sshd_t)

	tunable_policy(`ssh_sysadm_login',`

		# Relabel and access ptys created by sshd

		# ioctl is necessary for logout() processing for utmp entry and for w to

		# display the tty.

		# some versions of sshd on the new SE Linux require setattr

		term_use_all_user_ptys(sshd_t)

		term_setattr_all_user_ptys(sshd_t)

		term_relabelto_all_user_ptys(sshd_t)

		userdom_spec_domtrans_all_users(sshd_t)

		userdom_signal_all_users(sshd_t)

	',`

		userdom_spec_domtrans_unpriv_users(sshd_t)

		userdom_signal_unpriv_users(sshd_t)

		userdom_setattr_unpriv_users_ptys(sshd_t)

		userdom_relabelto_unpriv_users_ptys(sshd_t)

		userdom_use_unpriv_users_ptys(sshd_t)

	')

	optional_policy(`daemontools',`

		daemontools_service_domain(sshd_t, sshd_exec_t)

	')

	optional_policy(`rpm',`

		rpm_use_script_fds(sshd_t)

	')

	ifdef(`TODO',`

	tunable_policy(`ssh_sysadm_login',`

		# Relabel and access ptys created by sshd

		# ioctl is necessary for logout() processing for utmp entry and for w to

		# display the tty.

		# some versions of sshd on the new SE Linux require setattr

		allow sshd_t ptyfile:chr_file relabelto;

		optional_policy(`xauth',`

			domain_trans(sshd_t, xauth_exec_t, userdomain)

		')

	',`

		optional_policy(`xauth',`

			domain_trans(sshd_t, xauth_exec_t, unpriv_userdomain)

		')

		# Relabel and access ptys created by sshd

		# ioctl is necessary for logout() processing for utmp entry and for w to

		# display the tty.

		# some versions of sshd on the new SE Linux require setattr

		allow sshd_t userpty_type:chr_file { relabelto read write getattr ioctl setattr };

	')

	') dnl endif TODO

')

#################################

#

# sshd_extern local policy

#

# sshd_extern_t is the domain for ssh from outside our network

#

ifdef(`targeted_policy',`',`

	ifdef(`TODO',`

	domain_trans(sshd_extern_t, shell_exec_t, user_mini_domain)

	# Signal the user domains.

	allow sshd_extern_t user_mini_domain:process signal;

	ifdef(`xauth.te', `

	domain_trans(sshd_extern_t, xauth_exec_t, user_mini_domain)

	')

	# Relabel and access ptys created by sshd

	# ioctl is necessary for logout() processing for utmp entry and for w to

	# display the tty.

	# some versions of sshd on the new SE Linux require setattr

	allow sshd_extern_t user_mini_domain:chr_file { relabelto read write getattr ioctl setattr };

	# inheriting stream sockets is needed for "ssh host command" as no pty

	# is allocated

	allow user_mini_domain sshd_extern_t:unix_stream_socket rw_stream_socket_perms;

	optional_policy(`inetd',`

		tunable_policy(`run_ssh_inetd',`

			domain_trans(inetd_t, sshd_exec_t, sshd_extern_t)

		',`

			domain_trans(initrc_t, sshd_exec_t, sshd_extern_t)

		')

	',`

		# These rules should match the else block

		# of the run_ssh_inetd tunable directly above

		domain_trans(initrc_t, sshd_exec_t, sshd_extern_t)

	')

	ifdef(`direct_sysadm_daemon', `

	# Direct execution by sysadm_r.

	domain_auto_trans(sysadm_t, sshd_exec_t, sshd_t)

	role_transition sysadm_r sshd_exec_t system_r;

	')

	# for port forwarding

	allow userdomain sshd_t:tcp_socket { connectto recvfrom };

	allow sshd_t userdomain:tcp_socket { acceptfrom recvfrom };

	allow userdomain kernel_t:tcp_socket recvfrom;

	allow sshd_t kernel_t:tcp_socket recvfrom;

	') dnl endif TODO

')

########################################

#

# ssh_keygen local policy

#

ifdef(`targeted_policy',`',`

	# ssh_keygen_t is the type of the ssh-keygen program when run at install time

	# and by sysadm_t

	dontaudit ssh_keygen_t self:capability sys_tty_config;

	allow ssh_keygen_t self:process { sigchld sigkill sigstop signull signal };

	allow ssh_keygen_t self:unix_stream_socket create_stream_socket_perms;

	allow ssh_keygen_t sshd_key_t:file create_file_perms;

	files_etc_filetrans(ssh_keygen_t,sshd_key_t,file)

	kernel_read_kernel_sysctls(ssh_keygen_t)

	fs_search_auto_mountpoints(ssh_keygen_t)

	dev_read_sysfs(ssh_keygen_t)

	dev_read_urand(ssh_keygen_t)

	term_dontaudit_use_console(ssh_keygen_t)

	domain_use_interactive_fds(ssh_keygen_t)

	files_read_etc_files(ssh_keygen_t)

	init_use_fds(ssh_keygen_t)

	init_use_script_ptys(ssh_keygen_t)

	libs_use_ld_so(ssh_keygen_t)

	libs_use_shared_libs(ssh_keygen_t)

	logging_send_syslog_msg(ssh_keygen_t)

	allow ssh_keygen_t proc_t:dir r_dir_perms;

	allow ssh_keygen_t proc_t:lnk_file read;

	userdom_use_sysadm_ttys(ssh_keygen_t)

	userdom_dontaudit_use_unpriv_user_fds(ssh_keygen_t)

	# cjp: with the old daemon_(base_)domain being broken up into

	# a daemon and system interface, this probably is not needed:

	ifdef(`direct_sysadm_daemon',`

		userdom_dontaudit_use_sysadm_terms(ssh_keygen_t)

	')

	ifdef(`targeted_policy', `

		term_dontaudit_use_unallocated_ttys(ssh_keygen_t)

		term_dontaudit_use_generic_ptys(ssh_keygen_t)

		files_dontaudit_read_root_files(ssh_keygen_t)

	')

	optional_policy(`selinuxutil',`

		seutil_sigchld_newrole(ssh_keygen_t)

	')

	optional_policy(`udev',`

		udev_read_db(ssh_keygen_t)

	')

')