selinux-policy/policy/modules/apps/gpg.if

## <summary>Policy for GNU Privacy Guard and related programs.</summary>

#######################################
## <summary>
##	The per role template for the gpg module.
## </summary>
## <desc>
##	<p>
##	This template creates the types and rules for GPG,
##	GPG-agent, and GPG helper programs.  This protects
##	the user keys and secrets, and runs the programs
##	in domains specific to the user type.
##	</p>
##	<p>
##	This 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="userdomain">
##	<summary>
##	The user domain.
##	</summary>
## </param>
## <param name="role">
##	<summary>
##	The role associated with the user.
##	</summary>
## </param>
#
template(`gpg_per_role_template',`
	gen_require(`
		type gpg_exec_t, gpg_helper_exec_t;
		type gpg_agent_exec_t, pinentry_exec_t;
	')

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

	type $1_gpg_t;
	domain_type($1_gpg_t)
	domain_entry_file($1_gpg_t,gpg_exec_t)
	role $3 types $1_gpg_t;

	type $1_gpg_agent_t;
	domain_type($1_gpg_agent_t)
	domain_entry_file($1_gpg_agent_t,gpg_agent_exec_t)
	role $3 types $1_gpg_agent_t;

	type $1_gpg_agent_tmp_t;
	files_tmp_file($1_gpg_agent_tmp_t)

	type $1_gpg_secret_t;
	userdom_user_home_content($1,$1_gpg_secret_t)

	type $1_gpg_helper_t;
	domain_type($1_gpg_helper_t)
	domain_entry_file($1_gpg_helper_t,gpg_helper_exec_t)
	role $3 types $1_gpg_helper_t;

	type $1_gpg_pinentry_t;
	domain_type($1_gpg_pinentry_t)
	domain_entry_file($1_gpg_pinentry_t,pinentry_exec_t)
	role $3 types $1_gpg_pinentry_t;

	########################################
	#
	# GPG local policy
	#

	allow $1_gpg_t self:capability { ipc_lock setuid };
	allow { $2 $1_gpg_t } $1_gpg_t:process signal;
	# setrlimit is for ulimit -c 0
	allow $1_gpg_t self:process { setrlimit setcap setpgid };

	allow $1_gpg_t self:fifo_file rw_fifo_file_perms;
	allow $1_gpg_t self:tcp_socket create_stream_socket_perms;

	# transition from the gpg domain to the helper domain
	domtrans_pattern($1_gpg_t,gpg_helper_exec_t,$1_gpg_helper_t)

	manage_files_pattern($1_gpg_t,$1_gpg_secret_t,$1_gpg_secret_t)
	manage_lnk_files_pattern($1_gpg_t,$1_gpg_secret_t,$1_gpg_secret_t)
	allow $1_gpg_t $1_gpg_secret_t:dir create_dir_perms;
 	userdom_user_home_dir_filetrans($1, $1_gpg_t, $1_gpg_secret_t, dir)

	# transition from the userdomain to the derived domain
	domtrans_pattern($2,gpg_exec_t,$1_gpg_t)

	# allow ps to show gpg
	ps_process_pattern($2,$1_gpg_t)

	corenet_all_recvfrom_unlabeled($1_gpg_t)
	corenet_all_recvfrom_netlabel($1_gpg_t)
	corenet_tcp_sendrecv_all_if($1_gpg_t)
	corenet_udp_sendrecv_all_if($1_gpg_t)
	corenet_tcp_sendrecv_all_nodes($1_gpg_t)
	corenet_udp_sendrecv_all_nodes($1_gpg_t)
	corenet_tcp_sendrecv_all_ports($1_gpg_t)
	corenet_udp_sendrecv_all_ports($1_gpg_t)
	corenet_tcp_connect_all_ports($1_gpg_t)
	corenet_sendrecv_all_client_packets($1_gpg_t)

	dev_read_rand($1_gpg_t)
	dev_read_urand($1_gpg_t)

	fs_getattr_xattr_fs($1_gpg_t)

	domain_use_interactive_fds($1_gpg_t)

	files_read_etc_files($1_gpg_t)
	files_read_usr_files($1_gpg_t)
	files_dontaudit_search_var($1_gpg_t)

	libs_use_shared_libs($1_gpg_t)
	libs_use_ld_so($1_gpg_t)

	miscfiles_read_localization($1_gpg_t)

	logging_send_syslog_msg($1_gpg_t)

	sysnet_read_config($1_gpg_t)

	userdom_use_user_terminals($1,$1_gpg_t)

	optional_policy(`
		nis_use_ypbind($1_gpg_t)
	')

	ifdef(`TODO',`
	# Read content to encrypt/decrypt/sign
	read_content($1_gpg_t, $1)

	# Write content to encrypt/decrypt/sign
	write_trusted($1_gpg_t, $1)
	') dnl end TODO

	########################################
	#
	# GPG helper local policy
	#

	# 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 $1_gpg_helper_t self:unix_stream_socket create_stream_socket_perms;
	allow $1_gpg_helper_t self:tcp_socket { connect connected_socket_perms };
	allow $1_gpg_helper_t self:udp_socket { connect connected_socket_perms };

	# communicate with the user 
	allow $1_gpg_helper_t $2:fd use;
	allow $1_gpg_helper_t $2:fifo_file write;

	dontaudit $1_gpg_helper_t $1_gpg_secret_t:file read;

	corenet_all_recvfrom_unlabeled($1_gpg_helper_t)
	corenet_all_recvfrom_netlabel($1_gpg_helper_t)
	corenet_tcp_sendrecv_all_if($1_gpg_helper_t)
	corenet_raw_sendrecv_all_if($1_gpg_helper_t)
	corenet_udp_sendrecv_all_if($1_gpg_helper_t)
	corenet_tcp_sendrecv_all_nodes($1_gpg_helper_t)
	corenet_udp_sendrecv_all_nodes($1_gpg_helper_t)
	corenet_raw_sendrecv_all_nodes($1_gpg_helper_t)
	corenet_tcp_sendrecv_all_ports($1_gpg_helper_t)
	corenet_udp_sendrecv_all_ports($1_gpg_helper_t)
	corenet_tcp_bind_all_nodes($1_gpg_helper_t)
	corenet_udp_bind_all_nodes($1_gpg_helper_t)
	corenet_tcp_connect_all_ports($1_gpg_helper_t)

	dev_read_urand($1_gpg_helper_t)

	files_read_etc_files($1_gpg_helper_t)
	# for nscd
	files_dontaudit_search_var($1_gpg_helper_t)

	libs_use_ld_so($1_gpg_helper_t)
	libs_use_shared_libs($1_gpg_helper_t)

	sysnet_read_config($1_gpg_helper_t)

	tunable_policy(`use_nfs_home_dirs',`
		fs_dontaudit_rw_nfs_files($1_gpg_helper_t)
	')

	tunable_policy(`use_samba_home_dirs',`
		fs_dontaudit_rw_cifs_files($1_gpg_helper_t)
	')

	optional_policy(`
		xserver_use_xdm_fds($1_gpg_t)
		xserver_rw_xdm_pipes($1_gpg_t)
	')

	########################################
	#
	# GPG agent local policy
	#

	# rlimit: gpg-agent wants to prevent coredumps
	allow $1_gpg_agent_t self:process setrlimit;

	allow $1_gpg_agent_t self:unix_stream_socket create_stream_socket_perms ;
	allow $1_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($1_gpg_agent_t,$1_gpg_secret_t,$1_gpg_secret_t)
	manage_files_pattern($1_gpg_agent_t,$1_gpg_secret_t,$1_gpg_secret_t)
	manage_lnk_files_pattern($1_gpg_agent_t,$1_gpg_secret_t,$1_gpg_secret_t)

	# allow gpg to connect to the gpg agent
	stream_connect_pattern($1_gpg_t,$1_gpg_agent_tmp_t,$1_gpg_agent_tmp_t,$1_gpg_agent_t)

	# allow ps to show gpg-agent
	ps_process_pattern($2,$1_gpg_agent_t)

	# Allow the user shell to signal the gpg-agent program.
	allow $2 $1_gpg_agent_t:process { signal sigkill };

	manage_dirs_pattern($2,$1_gpg_agent_tmp_t,$1_gpg_agent_tmp_t)
	manage_files_pattern($2,$1_gpg_agent_tmp_t,$1_gpg_agent_tmp_t)
	manage_sock_files_pattern($2,$1_gpg_agent_tmp_t,$1_gpg_agent_tmp_t)
	files_tmp_filetrans($1_gpg_agent_t, $1_gpg_agent_tmp_t, { file sock_file dir })

	# Transition from the user domain to the derived domain.
	domtrans_pattern($2, gpg_agent_exec_t, $1_gpg_agent_t)

	corecmd_search_bin($1_gpg_agent_t)

	domain_use_interactive_fds($1_gpg_agent_t)

	libs_use_ld_so($1_gpg_agent_t)
	libs_use_shared_libs($1_gpg_agent_t)

	miscfiles_read_localization($1_gpg_agent_t)

	# Write to the user domain tty.
	userdom_use_user_terminals($1,$1_gpg_agent_t)
	# read and write ~/.gnupg (gpg-agent stores secret keys in ~/.gnupg/private-keys-v1.d )
	userdom_search_user_home_dirs($1,$1_gpg_agent_t)

	tunable_policy(`use_nfs_home_dirs',`
		fs_manage_nfs_dirs($1_gpg_agent_t)
		fs_manage_nfs_files($1_gpg_agent_t)
		fs_manage_nfs_symlinks($1_gpg_agent_t)
	')

	tunable_policy(`use_samba_home_dirs',`
		fs_manage_cifs_dirs($1_gpg_agent_t)
		fs_manage_cifs_files($1_gpg_agent_t)
		fs_manage_cifs_symlinks($1_gpg_agent_t)
	')

	##############################
	#
	# Pinentry local policy
	#

	allow $1_gpg_pinentry_t self:unix_stream_socket { connect create getattr read shutdown write };
	allow $1_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($1_gpg_agent_t,pinentry_exec_t,$1_gpg_pinentry_t)

	# read /proc/meminfo
	kernel_read_system_state($1_gpg_pinentry_t)

	files_read_usr_files($1_gpg_pinentry_t)
	# read /etc/X11/qtrc
	files_read_etc_files($1_gpg_pinentry_t)

	libs_use_ld_so($1_gpg_pinentry_t)
	libs_use_shared_libs($1_gpg_pinentry_t)

	miscfiles_read_fonts($1_gpg_pinentry_t)
	miscfiles_read_localization($1_gpg_pinentry_t)

	# for .Xauthority
	userdom_read_user_home_content_files($1,$1_gpg_pinentry_t)

	tunable_policy(`use_nfs_home_dirs',`
		fs_read_nfs_files($1_gpg_pinentry_t)
	')

	tunable_policy(`use_samba_home_dirs',`
		fs_read_cifs_files($1_gpg_pinentry_t)
	')

	optional_policy(`
		xserver_stream_connect_xdm_xserver($1_gpg_pinentry_t)
	')

	ifdef(`TODO',`
	allow $1_gpg_pinentry_t tmp_t:dir { getattr search };

	# wants to put some lock files into the user home dir, seems to work fine without
	dontaudit $1_gpg_pinentry_t $1_home_t:dir { read write };
	dontaudit $1_gpg_pinentry_t $1_home_t:file write;

	tunable_policy(`use_nfs_home_dirs',`
		dontaudit $1_gpg_pinentry_t nfs_t:dir write;
		dontaudit $1_gpg_pinentry_t nfs_t:file write;
	')

	tunable_policy(`use_samba_home_dirs',`
		dontaudit $1_gpg_pinentry_t cifs_t:dir write;
		dontaudit $1_gpg_pinentry_t cifs_t:file write;
	')

	dontaudit $1_gpg_pinentry_t { sysctl_t sysctl_kernel_t }:dir { getattr search };
	') dnl end TODO
')

########################################
## <summary>
##      Transition to a user gpg domain.
## </summary>
## <desc>
##      <p>
##      Transition to a user gpg domain.
##      </p>
##      <p>
##      This is a templated interface, and should only
##      be called from a per-userdomain template.
##      </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="domain">
##	<summary>
##      Domain allowed access.
##	</summary>
## </param>
#
template(`gpg_domtrans_user_gpg',`
	gen_require(`
		type $1_gpg_t, gpg_exec_t;
	')

	domtrans_pattern($2, gpg_exec_t, $1_gpg_t)
')

########################################
## <summary>
##      Send generic signals to user gpg processes.
## </summary>
## <desc>
##      <p>
##      This is a templated interface, and should only
##      be called from a per-userdomain template.
##      </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="domain">
##	<summary>
##      Domain allowed access.
##	</summary>
## </param>
#
template(`gpg_signal_user_gpg',`
	gen_require(`
		type $1_gpg_t;
	')

	allow $2 $1_gpg_t:process signal;
')