policy_module(gpg, 2.2.1)

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

#

# Declarations

#

## <desc>

## 

## Allow usage of the gpg-agent --write-env-file option.

## This also allows gpg-agent to manage user files.

## 

## </desc>

gen_tunable(gpg_agent_env_file, false)

type gpg_t;

type gpg_exec_t;

typealias gpg_t alias { user_gpg_t staff_gpg_t sysadm_gpg_t };

typealias gpg_t alias { auditadm_gpg_t secadm_gpg_t };

application_domain(gpg_t, gpg_exec_t)

ubac_constrained(gpg_t)

type gpg_agent_t;

type gpg_agent_exec_t;

typealias gpg_agent_t alias { user_gpg_agent_t staff_gpg_agent_t sysadm_gpg_agent_t };

typealias gpg_agent_t alias { auditadm_gpg_agent_t secadm_gpg_agent_t };

application_domain(gpg_agent_t, gpg_agent_exec_t)

ubac_constrained(gpg_agent_t)

type gpg_agent_tmp_t;

typealias gpg_agent_tmp_t alias { user_gpg_agent_tmp_t staff_gpg_agent_tmp_t sysadm_gpg_agent_tmp_t };

typealias gpg_agent_tmp_t alias { auditadm_gpg_agent_tmp_t secadm_gpg_agent_tmp_t };

files_tmp_file(gpg_agent_tmp_t)

ubac_constrained(gpg_agent_tmp_t)

type gpg_secret_t;

typealias gpg_secret_t alias { user_gpg_secret_t staff_gpg_secret_t sysadm_gpg_secret_t };

typealias gpg_secret_t alias { auditadm_gpg_secret_t secadm_gpg_secret_t };

userdom_user_home_content(gpg_secret_t)

type gpg_helper_t;

type gpg_helper_exec_t;

typealias gpg_helper_t alias { user_gpg_helper_t staff_gpg_helper_t sysadm_gpg_helper_t };

typealias gpg_helper_t alias { auditadm_gpg_helper_t secadm_gpg_helper_t };

application_domain(gpg_helper_t, gpg_helper_exec_t)

ubac_constrained(gpg_helper_t)

type gpg_pinentry_t;

type pinentry_exec_t;

typealias gpg_pinentry_t alias { user_gpg_pinentry_t staff_gpg_pinentry_t sysadm_gpg_pinentry_t };

typealias gpg_pinentry_t alias { auditadm_gpg_pinentry_t secadm_gpg_pinentry_t };

application_domain(gpg_pinentry_t, pinentry_exec_t)

ubac_constrained(gpg_pinentry_t)

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

#

# GPG local policy

#

allow gpg_t self:capability { ipc_lock setuid };

# setrlimit is for ulimit -c 0

allow gpg_t self:process { signal setrlimit getcap setcap setpgid };

allow gpg_t self:fifo_file rw_fifo_file_perms;

allow gpg_t self:tcp_socket create_stream_socket_perms;

manage_dirs_pattern(gpg_t, gpg_agent_tmp_t, gpg_agent_tmp_t)

manage_files_pattern(gpg_t, gpg_agent_tmp_t, gpg_agent_tmp_t)

files_tmp_filetrans(gpg_t, gpg_agent_tmp_t, { dir file })

# transition from the gpg domain to the helper domain

domtrans_pattern(gpg_t, gpg_helper_exec_t, gpg_helper_t)

allow gpg_t gpg_secret_t:dir create_dir_perms;

manage_files_pattern(gpg_t, gpg_secret_t, gpg_secret_t)

manage_lnk_files_pattern(gpg_t, gpg_secret_t, gpg_secret_t)

userdom_user_home_dir_filetrans(gpg_t, gpg_secret_t, dir)

kernel_read_sysctl(gpg_t)

corenet_all_recvfrom_unlabeled(gpg_t)

corenet_all_recvfrom_netlabel(gpg_t)

corenet_tcp_sendrecv_generic_if(gpg_t)

corenet_udp_sendrecv_generic_if(gpg_t)

corenet_tcp_sendrecv_generic_node(gpg_t)

corenet_udp_sendrecv_generic_node(gpg_t)

corenet_tcp_sendrecv_all_ports(gpg_t)

corenet_udp_sendrecv_all_ports(gpg_t)

corenet_tcp_connect_all_ports(gpg_t)

corenet_sendrecv_all_client_packets(gpg_t)

dev_read_rand(gpg_t)

dev_read_urand(gpg_t)

dev_read_generic_usb_dev(gpg_t)

fs_getattr_xattr_fs(gpg_t)

domain_use_interactive_fds(gpg_t)

files_read_etc_files(gpg_t)

files_read_usr_files(gpg_t)

files_dontaudit_search_var(gpg_t)

auth_use_nsswitch(gpg_t)

logging_send_syslog_msg(gpg_t)

miscfiles_read_localization(gpg_t)

userdom_use_user_terminals(gpg_t)

# sign/encrypt user files

userdom_manage_user_tmp_files(gpg_t)

userdom_manage_user_home_content_files(gpg_t)

mta_write_config(gpg_t)

tunable_policy(`use_nfs_home_dirs',`

	fs_manage_nfs_dirs(gpg_t)

	fs_manage_nfs_files(gpg_t)

')

tunable_policy(`use_samba_home_dirs',`

	fs_manage_cifs_dirs(gpg_t)

	fs_manage_cifs_files(gpg_t)

')

optional_policy(`

	xserver_use_xdm_fds(gpg_t)

	xserver_rw_xdm_pipes(gpg_t)

')

optional_policy(`

	cron_system_entry(gpg_t, gpg_exec_t)

	cron_read_system_job_tmp_files(gpg_t)

')

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

#

# GPG helper local policy

#

allow gpg_helper_t self:process { getsched setsched };

# for helper programs (which automatically fetch keys)

# Note: this is only tested with the hkp interface. If you use eg the 

# mail interface you will likely need additional permissions.

allow gpg_helper_t self:unix_stream_socket create_stream_socket_perms;

allow gpg_helper_t self:tcp_socket { connect connected_socket_perms };

allow gpg_helper_t self:udp_socket { connect connected_socket_perms };

dontaudit gpg_helper_t gpg_secret_t:file read;

corenet_all_recvfrom_unlabeled(gpg_helper_t)

corenet_all_recvfrom_netlabel(gpg_helper_t)

corenet_tcp_sendrecv_generic_if(gpg_helper_t)

corenet_raw_sendrecv_generic_if(gpg_helper_t)

corenet_udp_sendrecv_generic_if(gpg_helper_t)

corenet_tcp_sendrecv_generic_node(gpg_helper_t)

corenet_udp_sendrecv_generic_node(gpg_helper_t)

corenet_raw_sendrecv_generic_node(gpg_helper_t)

corenet_tcp_sendrecv_all_ports(gpg_helper_t)

corenet_udp_sendrecv_all_ports(gpg_helper_t)

corenet_tcp_bind_generic_node(gpg_helper_t)

corenet_udp_bind_generic_node(gpg_helper_t)

corenet_tcp_connect_all_ports(gpg_helper_t)

files_read_etc_files(gpg_helper_t)

auth_use_nsswitch(gpg_helper_t)

userdom_use_user_terminals(gpg_helper_t)

tunable_policy(`use_nfs_home_dirs',`

	fs_dontaudit_rw_nfs_files(gpg_helper_t)

')

tunable_policy(`use_samba_home_dirs',`

	fs_dontaudit_rw_cifs_files(gpg_helper_t)

')

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

#

# GPG agent local policy

#

# rlimit: gpg-agent wants to prevent coredumps

allow gpg_agent_t self:process setrlimit;

allow gpg_agent_t self:unix_stream_socket create_stream_socket_perms ;

allow gpg_agent_t self:fifo_file rw_fifo_file_perms;

# read and write ~/.gnupg (gpg-agent stores secret keys in ~/.gnupg/private-keys-v1.d )

manage_dirs_pattern(gpg_agent_t, gpg_secret_t, gpg_secret_t)

manage_files_pattern(gpg_agent_t, gpg_secret_t, gpg_secret_t)

manage_lnk_files_pattern(gpg_agent_t, gpg_secret_t, gpg_secret_t)

# Allow the gpg-agent to manage its tmp files (socket)

manage_dirs_pattern(gpg_agent_t, gpg_agent_tmp_t, gpg_agent_tmp_t)

manage_files_pattern(gpg_agent_t, gpg_agent_tmp_t, gpg_agent_tmp_t)

manage_sock_files_pattern(gpg_agent_t, gpg_agent_tmp_t, gpg_agent_tmp_t)

files_tmp_filetrans(gpg_agent_t, gpg_agent_tmp_t, { file sock_file dir })

# allow gpg to connect to the gpg agent

stream_connect_pattern(gpg_t, gpg_agent_tmp_t, gpg_agent_tmp_t, gpg_agent_t)

corecmd_search_bin(gpg_agent_t)

domain_use_interactive_fds(gpg_agent_t)

miscfiles_read_localization(gpg_agent_t)

# Write to the user domain tty.

userdom_use_user_terminals(gpg_agent_t)

# read and write ~/.gnupg (gpg-agent stores secret keys in ~/.gnupg/private-keys-v1.d )

userdom_search_user_home_dirs(gpg_agent_t)

tunable_policy(`gpg_agent_env_file',`

	# write ~/.gpg-agent-info or a similar to the users home dir

	# or subdir (gpg-agent --write-env-file option)

	#

	userdom_user_home_dir_filetrans_user_home_content(gpg_agent_t, file)

	userdom_manage_user_home_content_dirs(gpg_agent_t)

	userdom_manage_user_home_content_files(gpg_agent_t)

')

tunable_policy(`use_nfs_home_dirs',`

	fs_manage_nfs_dirs(gpg_agent_t)

	fs_manage_nfs_files(gpg_agent_t)

	fs_manage_nfs_symlinks(gpg_agent_t)

')

tunable_policy(`use_samba_home_dirs',`

	fs_manage_cifs_dirs(gpg_agent_t)

	fs_manage_cifs_files(gpg_agent_t)

	fs_manage_cifs_symlinks(gpg_agent_t)

')

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

#

# Pinentry local policy

#

allow gpg_pinentry_t self:unix_stream_socket { connect create getattr read shutdown write };

allow gpg_pinentry_t self:fifo_file rw_fifo_file_perms;

# we need to allow gpg-agent to call pinentry so it can get the passphrase 

# from the user.

domtrans_pattern(gpg_agent_t, pinentry_exec_t, gpg_pinentry_t)

# read /proc/meminfo

kernel_read_system_state(gpg_pinentry_t)

files_read_usr_files(gpg_pinentry_t)

# read /etc/X11/qtrc

files_read_etc_files(gpg_pinentry_t)

miscfiles_read_fonts(gpg_pinentry_t)

miscfiles_read_localization(gpg_pinentry_t)

# for .Xauthority

userdom_read_user_home_content_files(gpg_pinentry_t)

tunable_policy(`use_nfs_home_dirs',`

	fs_read_nfs_files(gpg_pinentry_t)

')

tunable_policy(`use_samba_home_dirs',`

	fs_read_cifs_files(gpg_pinentry_t)

')

optional_policy(`

	xserver_stream_connect(gpg_pinentry_t)

')