policy_module(ssh,1.5.2)

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

#

# Declarations

#

## <desc>

## 

## allow host key based authentication

## 

## </desc>

gen_tunable(allow_ssh_keysign,false)

## <desc>

## 

## Allow ssh logins as sysadm_r:sysadm_t

## 

## </desc>

gen_tunable(ssh_sysadm_login,false)

attribute ssh_server;

# Type for the ssh-agent executable.

type ssh_agent_exec_t;

files_type(ssh_agent_exec_t)

# ssh client executable.

type ssh_exec_t;

corecmd_executable_file(ssh_exec_t)

type ssh_keygen_t;

type ssh_keygen_exec_t;

init_system_domain(ssh_keygen_t,ssh_keygen_exec_t)

role system_r types ssh_keygen_t;

type ssh_keysign_exec_t;

corecmd_executable_file(ssh_keysign_exec_t)

type sshd_exec_t;

corecmd_executable_file(sshd_exec_t)

ssh_server_template(sshd)

init_daemon_domain(sshd_t,sshd_exec_t)

ssh_server_template(sshd_extern)

type sshd_key_t;

files_type(sshd_key_t)

type sshd_tmp_t;

files_tmp_file(sshd_tmp_t)

files_poly_parent(sshd_tmp_t)

ifdef(`enable_mcs',`

	init_ranged_daemon_domain(sshd_t,sshd_exec_t,s0 - mcs_systemhigh)

')

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

#

# sshd local policy

#

# sshd_t is the domain for the sshd program.

#

# so a tunnel can point to another ssh tunnel

allow sshd_t self:netlink_route_socket r_netlink_socket_perms;

allow sshd_t self:key { search link write };

manage_dirs_pattern(sshd_t,sshd_tmp_t,sshd_tmp_t)

manage_files_pattern(sshd_t,sshd_tmp_t,sshd_tmp_t)

manage_sock_files_pattern(sshd_t,sshd_tmp_t,sshd_tmp_t)

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

kernel_search_key(sshd_t)

kernel_link_key(sshd_t)

# for X forwarding

corenet_tcp_bind_xserver_port(sshd_t)

corenet_sendrecv_xserver_server_packets(sshd_t)

ifdef(`targeted_policy',`

	unconfined_domain(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_service_domain(sshd_t, sshd_exec_t)

')

optional_policy(`

	inetd_tcp_service_domain(sshd_t, sshd_exec_t)

')

optional_policy(`

	rpm_use_script_fds(sshd_t)

')

optional_policy(`

	rssh_spec_domtrans_all_users(sshd_t)

	# For reading /home/user/.ssh

	rssh_read_all_users_ro_content(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(`

		domain_trans(sshd_t, xauth_exec_t, userdomain)

	')

',`

	optional_policy(`

		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(`strict_policy',`

	ifdef(`TODO',`

	domain_trans(initrc_t, sshd_exec_t, sshd_extern_t)

	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(`

		domain_trans(inetd_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;

	')

	') dnl endif TODO

')

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

#

# ssh_keygen local 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 manage_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(`

	nscd_socket_use(ssh_keygen_t)

')

optional_policy(`

	seutil_sigchld_newrole(ssh_keygen_t)

')

optional_policy(`

	udev_read_db(ssh_keygen_t)

')