portage.te

policy_module(portage, 1.15.3)

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

## <desc>
##	<p>
##	Determine whether portage can
##	use nfs filesystems.
##	</p>
## </desc>
gen_tunable(portage_use_nfs, false)

attribute_role gcc_config_roles;
attribute_role portage_roles;
attribute_role portage_fetch_roles;

type gcc_config_t;
type gcc_config_exec_t;
application_domain(gcc_config_t, gcc_config_exec_t)
role gcc_config_roles types gcc_config_t;

# constraining type
type portage_t;
type portage_exec_t;
application_domain(portage_t, portage_exec_t)
domain_obj_id_change_exemption(portage_t)
rsync_entry_type(portage_t)
corecmd_shell_entry_type(portage_t)
role portage_roles types portage_t;

# portage compile sandbox domain
type portage_sandbox_t;
application_domain(portage_sandbox_t, portage_exec_t)
# the shell is the entrypoint if regular sandbox is disabled
# portage_exec_t is the entrypoint if regular sandbox is enabled
corecmd_shell_entry_type(portage_sandbox_t)
role portage_roles types portage_sandbox_t;

# portage package fetching domain
type portage_fetch_t;
type portage_fetch_exec_t;
application_domain(portage_fetch_t, portage_fetch_exec_t)
corecmd_shell_entry_type(portage_fetch_t)
rsync_entry_type(portage_fetch_t)
role portage_fetch_roles types portage_fetch_t;

type portage_devpts_t;
term_pty(portage_devpts_t)

type portage_ebuild_t;
files_mountpoint(portage_ebuild_t)

type portage_fetch_tmp_t;
files_tmp_file(portage_fetch_tmp_t)

type portage_db_t;
files_type(portage_db_t)

type portage_conf_t;
files_type(portage_conf_t)

type portage_cache_t;
files_type(portage_cache_t)

type portage_gpg_t;
files_type(portage_gpg_t)

type portage_log_t;
logging_log_file(portage_log_t)

type portage_srcrepo_t;
files_type(portage_srcrepo_t)

type portage_tmp_t;
files_tmp_file(portage_tmp_t)

type portage_tmpfs_t;
files_tmpfs_file(portage_tmpfs_t)

########################################
#
# gcc-config policy
#

allow gcc_config_t self:capability { chown fsetid };
allow gcc_config_t self:fifo_file rw_fifo_file_perms;

manage_files_pattern(gcc_config_t, portage_cache_t, portage_cache_t)

read_files_pattern(gcc_config_t, portage_conf_t, portage_conf_t)

allow gcc_config_t portage_ebuild_t:dir list_dir_perms;
read_files_pattern(gcc_config_t, portage_ebuild_t, portage_ebuild_t)

allow gcc_config_t portage_exec_t:file mmap_file_perms;

kernel_read_system_state(gcc_config_t)
kernel_read_kernel_sysctls(gcc_config_t)

corecmd_exec_shell(gcc_config_t)
corecmd_exec_bin(gcc_config_t)
corecmd_manage_bin_files(gcc_config_t)

domain_use_interactive_fds(gcc_config_t)

files_manage_etc_files(gcc_config_t)
files_rw_etc_runtime_files(gcc_config_t)
files_read_usr_files(gcc_config_t)
files_search_var_lib(gcc_config_t)
files_search_pids(gcc_config_t)
# complains loudly about not being able to list
# the directory it is being run from
files_list_all(gcc_config_t)

# seems to be ok without this
init_dontaudit_read_script_status_files(gcc_config_t)

libs_read_lib_files(gcc_config_t)
libs_run_ldconfig(gcc_config_t, portage_roles)
libs_manage_shared_libs(gcc_config_t)
# gcc-config creates a temp dir for the libs
libs_manage_lib_dirs(gcc_config_t)

logging_send_syslog_msg(gcc_config_t)

miscfiles_read_localization(gcc_config_t)

userdom_use_user_terminals(gcc_config_t)

consoletype_exec(gcc_config_t)

ifdef(`distro_gentoo',`
	init_exec_rc(gcc_config_t)
')

tunable_policy(`portage_use_nfs',`
	fs_read_nfs_files(gcc_config_t)
')

optional_policy(`
	seutil_use_newrole_fds(gcc_config_t)
')

########################################
#
# Portage Merging Rules
#

# - setfscreate for merging to live fs
allow portage_t self:process { setfscreate };
# - kill for mysql merging, at least
allow portage_t self:capability { kill setfcap sys_nice };
dontaudit portage_t self:capability { dac_read_search };
dontaudit portage_t self:netlink_route_socket rw_netlink_socket_perms;

# user post-sync scripts
can_exec(portage_t, portage_conf_t)

allow portage_t portage_log_t:file manage_file_perms;
logging_log_filetrans(portage_t, portage_log_t, file)

allow portage_t { portage_fetch_t portage_sandbox_t }:process signal;

# transition for rsync and wget
corecmd_shell_spec_domtrans(portage_t, portage_fetch_t)
rsync_entry_domtrans(portage_t, portage_fetch_t)
allow portage_fetch_t portage_t:fd use;
allow portage_fetch_t portage_t:fifo_file rw_fifo_file_perms;
allow portage_fetch_t portage_t:process sigchld;

# transition to sandbox for compiling
spec_domtrans_pattern(portage_t, portage_exec_t, portage_sandbox_t)
corecmd_shell_spec_domtrans(portage_t, portage_sandbox_t)

# run scripts out of the build directory
can_exec(portage_t, portage_tmp_t)

kernel_dontaudit_request_load_module(portage_t)
# merging baselayout will need this:
kernel_write_proc_files(portage_t)

domain_dontaudit_read_all_domains_state(portage_t)

# modify any files in the system
files_manage_all_files(portage_t)
# eselect uses file, which mmap()s its db
files_map_usr_files(portage_t)

selinux_get_fs_mount(portage_t)

auth_manage_shadow(portage_t)

# merging baselayout will need this:
init_exec(portage_t)

libs_run_ldconfig(portage_t, portage_roles)

miscfiles_read_localization(portage_t)

# run setfiles -r
seutil_run_setfiles(portage_t, portage_roles)
# run semodule
seutil_run_semanage(portage_t, portage_roles)

portage_run_gcc_config(portage_t, portage_roles)
# if sesandbox is disabled, compiling is performed in this domain
portage_compile_domain(portage_t)

optional_policy(`
	bootloader_run(portage_t, portage_roles)
')

optional_policy(`
	cron_system_entry(portage_t, portage_exec_t)
	cron_system_entry(portage_fetch_t, portage_fetch_exec_t)
')

optional_policy(`
	modutils_run(portage_t, portage_roles)
	#dontaudit update_modules_t portage_tmp_t:dir search_dir_perms;
')

optional_policy(`
	usermanage_run_groupadd(portage_t, portage_roles)
	usermanage_run_useradd(portage_t, portage_roles)
')

ifdef(`TODO',`
# seems to work ok without these
dontaudit portage_t device_t:{ blk_file chr_file } getattr;
dontaudit portage_t proc_t:dir setattr_dir_perms;
dontaudit portage_t device_type:chr_file read_chr_file_perms;
dontaudit portage_t device_type:blk_file read_blk_file_perms;
')

##########################################
#
# Portage fetch domain
# - for rsync and distfile fetching
#

allow portage_fetch_t self:process signal;
allow portage_fetch_t self:capability { chown dac_override fowner fsetid };
allow portage_fetch_t self:fifo_file rw_fifo_file_perms;
allow portage_fetch_t self:tcp_socket { accept listen };
allow portage_fetch_t self:unix_stream_socket create_socket_perms;

allow portage_fetch_t portage_conf_t:dir list_dir_perms;

allow portage_fetch_t portage_devpts_t:chr_file { rw_chr_file_perms setattr_chr_file_perms };

allow portage_fetch_t portage_gpg_t:dir rw_dir_perms;
allow portage_fetch_t portage_gpg_t:file manage_file_perms;

allow portage_fetch_t portage_tmp_t:dir manage_dir_perms;
allow portage_fetch_t portage_tmp_t:file manage_file_perms;

read_files_pattern(portage_fetch_t, portage_conf_t, portage_conf_t)

manage_dirs_pattern(portage_fetch_t, portage_ebuild_t, portage_ebuild_t)
manage_files_pattern(portage_fetch_t, portage_ebuild_t, portage_ebuild_t)

manage_dirs_pattern(portage_fetch_t, portage_fetch_tmp_t, portage_fetch_tmp_t)
manage_files_pattern(portage_fetch_t, portage_fetch_tmp_t, portage_fetch_tmp_t)
files_tmp_filetrans(portage_fetch_t, portage_fetch_tmp_t, { file dir })

kernel_read_system_state(portage_fetch_t)
kernel_read_kernel_sysctls(portage_fetch_t)

corecmd_exec_bin(portage_fetch_t)
corecmd_exec_shell(portage_fetch_t)

corenet_all_recvfrom_unlabeled(portage_fetch_t)
corenet_all_recvfrom_netlabel(portage_fetch_t)
corenet_tcp_sendrecv_generic_if(portage_fetch_t)
corenet_tcp_sendrecv_generic_node(portage_fetch_t)
corenet_tcp_sendrecv_all_ports(portage_fetch_t)
corenet_tcp_connect_http_cache_port(portage_fetch_t)
corenet_tcp_connect_git_port(portage_fetch_t)
corenet_tcp_connect_rsync_port(portage_fetch_t)
corenet_sendrecv_http_client_packets(portage_fetch_t)
corenet_sendrecv_http_cache_client_packets(portage_fetch_t)
corenet_sendrecv_git_client_packets(portage_fetch_t)
corenet_sendrecv_rsync_client_packets(portage_fetch_t)
# would rather not connect to unspecified ports, but
# it occasionally comes up
corenet_tcp_connect_all_reserved_ports(portage_fetch_t)
corenet_tcp_connect_generic_port(portage_fetch_t)

dev_dontaudit_read_rand(portage_fetch_t)

domain_use_interactive_fds(portage_fetch_t)

files_read_etc_runtime_files(portage_fetch_t)
files_read_usr_files(portage_fetch_t)
files_dontaudit_search_pids(portage_fetch_t)

fs_search_auto_mountpoints(portage_fetch_t)

logging_list_logs(portage_fetch_t)
logging_dontaudit_search_logs(portage_fetch_t)

term_search_ptys(portage_fetch_t)

auth_use_nsswitch(portage_fetch_t)

miscfiles_read_generic_certs(portage_fetch_t)
miscfiles_read_localization(portage_fetch_t)

userdom_use_user_terminals(portage_fetch_t)
userdom_dontaudit_read_user_home_content_files(portage_fetch_t)

rsync_exec(portage_fetch_t)

ifdef(`hide_broken_symptoms',`
	dontaudit portage_fetch_t portage_cache_t:file read;
')

tunable_policy(`portage_use_nfs',`
	fs_getattr_nfs(portage_fetch_t)
	fs_manage_nfs_dirs(portage_fetch_t)
	fs_manage_nfs_files(portage_fetch_t)
	fs_manage_nfs_symlinks(portage_fetch_t)
')

optional_policy(`
	gpg_exec(portage_fetch_t)
')

##########################################
#
# Portage sandbox domain
# - SELinux-enforced sandbox
#

allow portage_sandbox_t self:process ptrace;
dontaudit portage_sandbox_t self:netlink_route_socket rw_netlink_socket_perms;

allow portage_sandbox_t portage_log_t:file { create_file_perms delete_file_perms setattr_file_perms append_file_perms };
logging_log_filetrans(portage_sandbox_t, portage_log_t, file)

portage_compile_domain(portage_sandbox_t)

auth_use_nsswitch(portage_sandbox_t)

ifdef(`hide_broken_symptoms',`
	# leaked descriptors
	dontaudit portage_sandbox_t portage_cache_t:dir { setattr_dir_perms };
	dontaudit portage_sandbox_t portage_cache_t:file { setattr_file_perms write };
')