selinux-refpolicy/policy/modules/services/kerberos.if

## <summary>MIT Kerberos admin and KDC.</summary>

########################################
## <summary>
##	Execute kadmind in the caller domain.
## </summary>
## <param name="domain">
## <summary>
##	Domain allowed access.
## </summary>
## </param>
#
interface(`kerberos_exec_kadmind',`
	gen_require(`
		type kadmind_exec_t;
	')

	corecmd_search_bin($1)
	can_exec($1, kadmind_exec_t)
')

########################################
## <summary>
##	Execute a domain transition to run kpropd.
## </summary>
## <param name="domain">
## <summary>
##	Domain allowed to transition.
## </summary>
## </param>
#
interface(`kerberos_domtrans_kpropd',`
	gen_require(`
		type kpropd_t, kpropd_exec_t;
	')

	corecmd_search_bin($1)
	domtrans_pattern($1, kpropd_exec_t, kpropd_t)
')

########################################
## <summary>
##	Support kerberos services.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`kerberos_use',`
	gen_require(`
		type krb5kdc_conf_t, krb5_host_rcache_t, krb5_conf_t;
	')

	kerberos_read_config($1)

	dontaudit $1 krb5_conf_t:file write_file_perms;
	dontaudit $1 krb5kdc_conf_t:dir list_dir_perms;
	dontaudit $1 krb5kdc_conf_t:file rw_file_perms;

	dontaudit $1 self:process setfscreate;

	selinux_dontaudit_validate_context($1)
	seutil_dontaudit_read_file_contexts($1)

	tunable_policy(`allow_kerberos',`
		allow $1 self:tcp_socket create_socket_perms;
		allow $1 self:udp_socket create_socket_perms;

		corenet_all_recvfrom_netlabel($1)
		corenet_tcp_sendrecv_generic_if($1)
		corenet_udp_sendrecv_generic_if($1)
		corenet_tcp_sendrecv_generic_node($1)
		corenet_udp_sendrecv_generic_node($1)

		corenet_sendrecv_kerberos_client_packets($1)
		corenet_tcp_connect_kerberos_port($1)

		corenet_sendrecv_ocsp_client_packets($1)
		corenet_tcp_connect_ocsp_port($1)

		allow $1 krb5_host_rcache_t:file getattr_file_perms;
	')

	optional_policy(`
		tunable_policy(`allow_kerberos',`
			pcscd_stream_connect($1)
		')
	')

	optional_policy(`
		sssd_read_public_files($1)
	')
')

########################################
## <summary>
##	Read kerberos configuration files.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
## <rolecap/>
#
interface(`kerberos_read_config',`
	gen_require(`
		type krb5_conf_t, krb5_home_t;
	')

	files_search_etc($1)
	allow $1 krb5_conf_t:file read_file_perms;

	userdom_search_user_home_dirs($1)
	allow $1 krb5_home_t:file read_file_perms;
')

########################################
## <summary>
##	Do not audit attempts to write
##	kerberos configuration files.
## </summary>
## <param name="domain">
##	<summary>
##	Domain to not audit.
##	</summary>
## </param>
#
interface(`kerberos_dontaudit_write_config',`
	gen_require(`
		type krb5_conf_t;
	')

	dontaudit $1 krb5_conf_t:file write_file_perms;
')

########################################
## <summary>
##	Read and write kerberos
##	configuration files.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
## <rolecap/>
#
interface(`kerberos_rw_config',`
	gen_require(`
		type krb5_conf_t;
	')

	files_search_etc($1)
	allow $1 krb5_conf_t:file rw_file_perms;
')

########################################
## <summary>
##	Create, read, write, and delete
##	kerberos home files.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`kerberos_manage_krb5_home_files',`
	gen_require(`
		type krb5_home_t;
	')

	userdom_search_user_home_dirs($1)
	allow $1 krb5_home_t:file manage_file_perms;
')

########################################
## <summary>
##	Relabel kerberos home files.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`kerberos_relabel_krb5_home_files',`
	gen_require(`
		type krb5_home_t;
	')

	userdom_search_user_home_dirs($1)
	allow $1 krb5_home_t:file relabel_file_perms;
')

########################################
## <summary>
##	Create objects in user home
##	directories with the krb5 home type.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
## <param name="object_class">
##	<summary>
##	Class of the object being created.
##	</summary>
## </param>
## <param name="name" optional="true">
##	<summary>
##	The name of the object being created.
##	</summary>
## </param>
#
interface(`kerberos_home_filetrans_krb5_home',`
	gen_require(`
		type krb5_home_t;
	')

	userdom_user_home_dir_filetrans($1, krb5_home_t, $2, $3)
')

########################################
## <summary>
##	Read kerberos key table files.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
## <rolecap/>
#
interface(`kerberos_read_keytab',`
	gen_require(`
		type krb5_keytab_t;
	')

	files_search_etc($1)
	allow $1 krb5_keytab_t:file read_file_perms;
')

########################################
## <summary>
##	Read and write kerberos key table files.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`kerberos_rw_keytab',`
	gen_require(`
		type krb5_keytab_t;
	')

	files_search_etc($1)
	allow $1 krb5_keytab_t:file rw_file_perms;
')

########################################
## <summary>
##	Create, read, write, and delete
##	kerberos key table files.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`kerberos_manage_keytab_files',`
	gen_require(`
		type krb5_keytab_t;
	')

	files_search_etc($1)
	allow $1 krb5_keytab_t:file manage_file_perms;
')

########################################
## <summary>
##	Create specified objects in generic
##	etc directories with the kerberos
##	keytab file type.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
## <param name="object_class">
##	<summary>
##	Class of the object being created.
##	</summary>
## </param>
## <param name="name" optional="true">
##	<summary>
##	The name of the object being created.
##	</summary>
## </param>
#
interface(`kerberos_etc_filetrans_keytab',`
	gen_require(`
		type krb5_keytab_t;
	')

	files_etc_filetrans($1, krb5_keytab_t, $2, $3)
')

########################################
## <summary>
##	Read kerberos kdc configuration files.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
## <rolecap/>
#
interface(`kerberos_read_kdc_config',`
	gen_require(`
		type krb5kdc_conf_t;
	')

	files_search_etc($1)
	read_files_pattern($1, krb5kdc_conf_t, krb5kdc_conf_t)
')

########################################
## <summary>
##	Create, read, write, and delete
##	kerberos host rcache files.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
## <rolecap/>
#
interface(`kerberos_manage_host_rcache',`
	gen_require(`
		type krb5_host_rcache_t;
	')

	domain_obj_id_change_exemption($1)

	tunable_policy(`allow_kerberos',`
		allow $1 self:process setfscreate;

		selinux_validate_context($1)

		seutil_read_file_contexts($1)

		files_search_tmp($1)
		allow $1 krb5_host_rcache_t:file manage_file_perms;
	')
')

########################################
## <summary>
##	Create objects in generic temporary
##	directories with the kerberos host
##	rcache type.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed to transition.
##	</summary>
## </param>
## <param name="object_class">
##	<summary>
##	Class of the object being created.
##	</summary>
## </param>
## <param name="name" optional="true">
##	<summary>
##	The name of the object being created.
##	</summary>
## </param>
#
interface(`kerberos_tmp_filetrans_host_rcache',`
	gen_require(`
		type krb5_host_rcache_t;
	')

	files_tmp_filetrans($1, krb5_host_rcache_t, $2, $3)
')

########################################
## <summary>
##	Connect to krb524 service.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`kerberos_connect_524',`
	tunable_policy(`allow_kerberos',`
		allow $1 self:udp_socket create_socket_perms;

		corenet_all_recvfrom_netlabel($1)
		corenet_udp_sendrecv_generic_if($1)
		corenet_udp_sendrecv_generic_node($1)

		corenet_sendrecv_kerberos_master_client_packets($1)
	')
')

########################################
## <summary>
##	All of the rules required to
##	administrate an kerberos environment.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
## <param name="role">
##	<summary>
##	Role allowed access.
##	</summary>
## </param>
## <rolecap/>
#
interface(`kerberos_admin',`
	gen_require(`
		type kadmind_t, krb5kdc_t, kerberos_initrc_exec_t;
		type kadmind_log_t, kadmind_tmp_t, kadmind_runtime_t;
		type krb5_conf_t, krb5_keytab_t, krb5kdc_conf_t;
		type krb5kdc_principal_t, krb5kdc_tmp_t, kpropd_t;
		type krb5kdc_runtime_t, krb5_host_rcache_t;
	')

	allow $1 { kadmind_t krb5kdc_t kpropd_t }:process { ptrace signal_perms };
	ps_process_pattern($1, { kadmind_t krb5kdc_t kpropd_t })

	init_startstop_service($1, $2, { kadmind_t krb5kdc_t }, kerberos_initrc_exec_t)

	logging_list_logs($1)
	admin_pattern($1, kadmind_log_t)

	files_list_tmp($1)
	admin_pattern($1, { kadmind_tmp_t krb5_host_rcache_t krb5kdc_tmp_t })

	kerberos_tmp_filetrans_host_rcache($1, file, "host_0")
	kerberos_tmp_filetrans_host_rcache($1, file, "HTTP_23")
	kerberos_tmp_filetrans_host_rcache($1, file, "HTTP_48")
	kerberos_tmp_filetrans_host_rcache($1, file, "imap_0")
	kerberos_tmp_filetrans_host_rcache($1, file, "nfs_0")
	kerberos_tmp_filetrans_host_rcache($1, file, "ldapmap1_0")
	kerberos_tmp_filetrans_host_rcache($1, file, "ldap_487")
	kerberos_tmp_filetrans_host_rcache($1, file, "ldap_55")

	files_list_pids($1)
	admin_pattern($1, { kadmind_runtime_t krb5kdc_runtime_t })

	files_list_etc($1)
	admin_pattern($1, krb5_conf_t)

	files_etc_filetrans($1, krb5_conf_t, file, "krb5.conf")

	admin_pattern($1, { krb5_keytab_t  krb5kdc_principal_t })

	filetrans_pattern($1, krb5kdc_conf_t, krb5kdc_principal_t, file, "principal")
	filetrans_pattern($1, krb5kdc_conf_t, krb5kdc_principal_t, file, "principal0")
	filetrans_pattern($1, krb5kdc_conf_t, krb5kdc_principal_t, file, "principal1")

	kerberos_etc_filetrans_keytab($1, file, "kadm5.keytab")
')