selinux-policy/policy/modules/apps/userhelper.if
2007-03-23 23:24:59 +00:00

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## <summary>SELinux utility to run a shell with a new role</summary>
#######################################
## <summary>
## The per role template for the userhelper module.
## </summary>
## <desc>
## <p>
## This template creates a derived domains which are used
## for userhelper.
## </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>
## <param name="user_domain">
## <summary>
## The type of the user domain.
## </summary>
## </param>
## <param name="user_role">
## <summary>
## The role associated with the user domain.
## </summary>
## </param>
#
template(`userhelper_per_role_template',`
gen_require(`
type userhelper_exec_t, userhelper_conf_t;
')
########################################
#
# Declarations
#
type $1_userhelper_t;
domain_type($1_userhelper_t)
domain_entry_file($1_userhelper_t,userhelper_exec_t)
domain_role_change_exemption($1_userhelper_t)
domain_obj_id_change_exemption($1_userhelper_t)
domain_interactive_fd($1_userhelper_t)
domain_subj_id_change_exemption($1_userhelper_t)
role $3 types $1_userhelper_t;
########################################
#
# Local policy
#
allow $1_userhelper_t self:capability { setuid setgid net_bind_service dac_override chown sys_tty_config };
allow $1_userhelper_t self:process ~{ ptrace setcurrent setexec setfscreate setrlimit execmem execstack execheap };
allow $1_userhelper_t self:process setexec;
allow $1_userhelper_t self:fd use;
allow $1_userhelper_t self:fifo_file rw_fifo_file_perms;
allow $1_userhelper_t self:shm create_shm_perms;
allow $1_userhelper_t self:sem create_sem_perms;
allow $1_userhelper_t self:msgq create_msgq_perms;
allow $1_userhelper_t self:msg { send receive };
allow $1_userhelper_t self:unix_dgram_socket create_socket_perms;
allow $1_userhelper_t self:unix_stream_socket create_stream_socket_perms;
allow $1_userhelper_t self:unix_dgram_socket sendto;
allow $1_userhelper_t self:unix_stream_socket connectto;
allow $1_userhelper_t self:sock_file read_sock_file_perms;
#Transition to the derived domain.
domtrans_pattern($2,userhelper_exec_t,$1_userhelper_t)
allow $1_userhelper_t userhelper_conf_t:dir rw_dir_perms;
rw_files_pattern($1_userhelper_t,userhelper_conf_t,userhelper_conf_t)
can_exec($1_userhelper_t, userhelper_exec_t)
dontaudit $2 $1_userhelper_t:process signal;
kernel_read_all_sysctls($1_userhelper_t)
kernel_getattr_debugfs($1_userhelper_t)
kernel_read_system_state($1_userhelper_t)
# Execute shells
corecmd_exec_shell($1_userhelper_t)
# By default, revert to the calling domain when a program is executed
corecmd_bin_domtrans($1_userhelper_t,$2)
# Inherit descriptors from the current session.
domain_use_interactive_fds($1_userhelper_t)
# for when the user types "exec userhelper" at the command line
domain_sigchld_interactive_fds($1_userhelper_t)
dev_read_urand($1_userhelper_t)
# Read /dev directories and any symbolic links.
dev_list_all_dev_nodes($1_userhelper_t)
files_list_var_lib($1_userhelper_t)
# Write to utmp.
files_pid_filetrans($1_userhelper_t,initrc_var_run_t,file)
# Read the /etc/security/default_type file
files_read_etc_files($1_userhelper_t)
# Read /var.
files_read_var_files($1_userhelper_t)
files_read_var_symlinks($1_userhelper_t)
# for some PAM modules and for cwd
files_search_home($1_userhelper_t)
fs_search_auto_mountpoints($1_userhelper_t)
fs_read_nfs_files($1_userhelper_t)
fs_read_nfs_symlinks($1_userhelper_t)
# Allow $1_userhelper to obtain contexts to relabel TTYs
selinux_get_fs_mount($1_userhelper_t)
selinux_validate_context($1_userhelper_t)
selinux_compute_access_vector($1_userhelper_t)
selinux_compute_create_context($1_userhelper_t)
selinux_compute_relabel_context($1_userhelper_t)
selinux_compute_user_contexts($1_userhelper_t)
# Read the devpts root directory.
term_list_ptys($1_userhelper_t)
# Relabel terminals.
term_relabel_all_user_ttys($1_userhelper_t)
term_relabel_all_user_ptys($1_userhelper_t)
# Access terminals.
term_use_all_user_ttys($1_userhelper_t)
term_use_all_user_ptys($1_userhelper_t)
auth_domtrans_chk_passwd($1_userhelper_t)
auth_manage_pam_pid($1_userhelper_t)
auth_manage_var_auth($1_userhelper_t)
auth_search_pam_console_data($1_userhelper_t)
# Inherit descriptors from the current session.
init_use_fds($1_userhelper_t)
# Write to utmp.
init_manage_utmp($1_userhelper_t)
libs_use_ld_so($1_userhelper_t)
libs_use_shared_libs($1_userhelper_t)
miscfiles_read_localization($1_userhelper_t)
seutil_read_config($1_userhelper_t)
seutil_read_default_contexts($1_userhelper_t)
userdom_use_unpriv_users_fds($1_userhelper_t)
# Allow $1_userhelper_t to transition to user domains.
userdom_bin_spec_domtrans_unpriv_users($1_userhelper_t)
userdom_entry_spec_domtrans_unpriv_users($1_userhelper_t)
ifdef(`distro_redhat',`
optional_policy(`
# Allow transitioning to rpm_t, for up2date
rpm_domtrans($1_userhelper_t)
')
')
tunable_policy(`! secure_mode',`
#if we are not in secure mode then we can transition to sysadm_t
userdom_bin_spec_domtrans_sysadm($1_userhelper_t)
userdom_entry_spec_domtrans_sysadm($1_userhelper_t)
')
optional_policy(`
ethereal_domtrans_user_ethereal($1,$1_userhelper_t)
')
optional_policy(`
logging_send_syslog_msg($1_userhelper_t)
')
optional_policy(`
nis_use_ypbind($1_userhelper_t)
')
optional_policy(`
nscd_socket_use($1_userhelper_t)
')
ifdef(`TODO',`
allow $1_userhelper_t xdm_t:fd use;
allow $1_userhelper_t xdm_var_run_t:dir search;
allow $1_userhelper_t xdm_t:fifo_file { getattr read write ioctl };
optional_policy(`
allow $1_userhelper_t gphdomain:fd use;
')
optional_policy(`
domtrans_pattern($1_userhelper_t, xauth_exec_t, $1_xauth_t)
allow $1_userhelper_t $1_xauth_home_t:file { getattr read };
')
optional_policy(`
domtrans_pattern($1_mozilla_t, userhelper_exec_t, $1_userhelper_t)
')
# for when the network connection is killed
dontaudit unpriv_userdomain $1_userhelper_t:process signal;
')
')
########################################
## <summary>
## Search the userhelper configuration directory.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`userhelper_search_config',`
gen_require(`
type userhelper_conf_t;
')
allow $1 userhelper_conf_t:dir search_dir_perms;
')
########################################
## <summary>
## Do not audit attempts to search
## the userhelper configuration directory.
## </summary>
## <param name="domain">
## <summary>
## Domain to not audit.
## </summary>
## </param>
#
interface(`userhelper_dontaudit_search_config',`
gen_require(`
type userhelper_conf_t;
')
dontaudit $1 userhelper_conf_t:dir search_dir_perms;
')
########################################
## <summary>
## Allow domain to use userhelper file descriptor.
## </summary>
## <param name="prefix">
## <summary>
## The prefix of the domain, example user is the prefix of user_t.
## </summary>
## </param>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
template(`userhelper_use_user_fd',`
gen_require(`
type $1_userhelper_t;
')
allow $2 $1_userhelper_t:fd use;
')
########################################
## <summary>
## Allow domain to send sigchld to userhelper.
## </summary>
## <param name="prefix">
## <summary>
## The prefix of the domain, example user is the prefix of user_t.
## </summary>
## </param>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
template(`userhelper_sigchld_user',`
gen_require(`
type $1_userhelper_t;
')
allow $2 $1_userhelper_t:process sigchld;
')
########################################
## <summary>
## Execute the userhelper program in the caller domain.
## </summary>
## <param name="domain">
## <summary>
## The type of the process performing this action.
## </summary>
## </param>
#
interface(`userhelper_exec',`
gen_require(`
type userhelper_exec_t;
')
can_exec($1,userhelper_exec_t)
')