Tinydns Policy Files

["Matthew J. Fanto" <mattjf@uncompiled.com>]

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Here are updated policy files for tinydns. This is the first policy file
I've written, so I'd appreciate any feedback. This was written for
Debian stable.

-Matthew J. Fanto

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# tinydns
/etc/tinydns?			system_u:object_r:tinydns_conf_t
/etc/tinydns/root(/.*)?		system_u:object_r:tinydns_conf_t
/etc/tinydns/env(/.*)?		system_u:object_r:tinydns_conf_t
/etc/tinydns/root/data* --      system_u:object_r:tinydns_zone_t
/etc/tinydns/run*	--	system_u:object_r:tinydns_exec_t
/etc/tinydns/log/run*	--	system_u:object_r:tinydns_exec_t
/usr/bin/tinydns*	--	system_u:object_r:tinydns_exec_t


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#DESC TINYDNS - Policy file for the tinydns authoritative nameserver
#
# Author:  Matthew J. Fanto <mattjf@uncompiled.com>
# 
#   Based off Named policy file written by
# 	Yuichi Nakamura <ynakam@ori.hitachi-sk.co.jp>,
# 	Russell Coker <russell@coker.com.au>
#
# X-Debian-Packages: djbdns-installer djbdns

# we only define tinydns_port_t if we aren't
# using named or nsd, as it would conflict
ifdef(`named.te', `', `
ifdef(`nsd.te', `', `
type tinydns_port_t, port_type;
')dnl end if nsd.te
')dnl end if named.te

daemon_domain(tinydns)

# allow programs in the tinydns_t domain to execute tinydns_exec_t binaries
can_exec(tinydns_t, tinydns_exec_t)

# type for tinydns config files (/etc/tinydns(/.*)?) but does not
# include zone files
type tinydns_conf_t, file_type, sysadmfile;

# for primary zone files (/etc/selinux/root/data)
type tinydns_zone_t, file_type, sysadmfile;

# allow tinydns access to a few files it needs
allow tinydns_t etc_t:file { getattr read };
allow tinydns_t etc_runtime_t:{ file lnk_file } { getattr read };
allow tinydns_t resolv_conf_t:file { getattr read };
allow tinydns_t sbin_t:dir search;

# tinydns can use the network
can_network(tinydns_t)
allow tinydns_t tinydns_port_t:{ udp_socket } name_bind;
can_udp_send(domain, tinydns_t)
can_udp_send(tinydns_t, domain)
allow tinydns_t self:unix_dgram_socket create_socket_perms;

# read configuration files and zone files
r_dir_file(tinydns_t, tinydns_conf_t)
r_dir_file(tinydns_t, tinydns_zone_t)

# tinydns writes to a fifo and multilog reads it
# this is used for logging
ifdef(`daemontools.te', `
allow tinydns_t svc_start_t:fd { use };
allow tinydns_t svc_start_t:fifo_file { write };
')	

# allow tinydns to read /proc/meminfo
allow tinydns_t proc_t:file { getattr read };

# allow tinydns to search /etc/tinydns/log
allow tinydns_t svc_log_t:dir { getattr search };

# allow tinydns to search /bin
allow tinydns_t bin_t:dir { search };

# allow tinydns to gettar svc_run_exec_t files
ifdef(`daemontools.te', `
can_exec(tinydns_t, svc_run_exec_t)
domain_auto_trans(tinydns_t, svc_run_exec_t, svc_run_t)
')

# Set capabilites
allow tinydns_t self:capability { sys_tty_config net_bind_service sys_chroot setgid setuid };