# Copyright (C) 2005 Tresys Technology, LLC

policy_module(sendmail,1.0)

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

#

# Declarations

#

type sendmail_t; # , nscd_client_domain, mta_delivery_agent, mail_server_sender', nosysadm)

mta_make_sendmail_mailserver_domain(sendmail_t)

type sendmail_log_t;

logging_make_log_file(sendmail_log_t)

type sendmail_tmp_t;

files_make_temporary_file(sendmail_tmp_t)

type sendmail_var_run_t;

files_make_daemon_runtime_file(sendmail_var_run_t)

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

#

# Sendmail local policy

#

allow sendmail_t self:capability { setuid setgid net_bind_service sys_nice chown sys_tty_config };

allow sendmail_t self:fifo_file { getattr read write append ioctl lock  };

allow sendmail_t self:unix_stream_socket { create ioctl read getattr write setattr append bind connect getopt setopt shutdown listen accept };

allow sendmail_t self:unix_dgram_socket { create ioctl read getattr write setattr append bind connect getopt setopt shutdown };

allow sendmail_t sendmail_log_t:file { create ioctl read getattr lock write setattr append link unlink rename };

allow sendmail_t sendmail_log_t:dir { getattr search read lock ioctl add_name remove_name write setattr };

logging_create_private_log(sendmail_t,sendmail_log_t,{ file dir })

allow sendmail_t sendmail_tmp_t:dir { create read getattr lock setattr ioctl link unlink rename search add_name remove_name reparent write rmdir };

allow sendmail_t sendmail_tmp_t:file { create ioctl read getattr lock write setattr append link unlink rename };

files_create_private_tmp_data(sendmail_t, sendmail_tmp_t, { file dir })

allow sendmail_t sendmail_var_run_t:file { getattr create read write append setattr unlink };

files_create_daemon_runtime_data(sendmail_t,sendmail_var_run_t)

kernel_read_kernel_sysctl(sendmail_t)

kernel_read_hardware_state(sendmail_t)

corenetwork_network_tcp_on_all_interfaces(sendmail_t)

corenetwork_network_raw_on_all_interfaces(sendmail_t)

corenetwork_network_udp_on_all_interfaces(sendmail_t)

corenetwork_network_tcp_on_all_nodes(sendmail_t)

corenetwork_network_raw_on_all_nodes(sendmail_t)

corenetwork_network_udp_on_all_nodes(sendmail_t)

corenetwork_network_tcp_on_all_ports(sendmail_t)

corenetwork_network_udp_on_all_ports(sendmail_t)

corenetwork_bind_tcp_on_all_nodes(sendmail_t)

corenetwork_bind_udp_on_all_nodes(sendmail_t)

corenetwork_bind_tcp_on_smtp_port(sendmail_t)

devices_get_pseudorandom_data(sendmail_t)

filesystem_get_all_filesystems_attributes(sendmail_t)

terminal_ignore_use_console(sendmail_t)

init_use_file_descriptors(sendmail_t)

init_script_use_pseudoterminal(sendmail_t)

# sendmail wants to read /var/run/utmp if the controlling tty is /dev/console

init_script_read_runtime_data(sendmail_t)

init_script_ignore_write_runtime_data(sendmail_t)

domain_use_widely_inheritable_file_descriptors(sendmail_t)

files_read_general_system_config(sendmail_t)

files_search_system_spool_directory(sendmail_t)

logging_send_system_log_message(sendmail_t)

libraries_use_dynamic_loader(sendmail_t)

libraries_read_shared_libraries(sendmail_t)

# Read /usr/lib/sasl2/.*

libraries_read_library_resources(sendmail_t)

miscfiles_read_localization(sendmail_t)

# Write to /etc/aliases and /etc/mail.

mta_modify_mail_aliases(sendmail_t)

# Write to /var/spool/mail and /var/spool/mqueue.

mta_manage_mail_queue(sendmail_t)

mta_manage_mail_spool(sendmail_t)

sysnetwork_read_network_config(sendmail_t)

tunable_policy(`targeted_policy', `

terminal_ignore_use_general_physical_terminal(sendmail_t)

terminal_ignore_use_general_pseudoterminal(sendmail_t)

files_ignore_read_rootfs_file(sendmail_t)

')

optional_policy(`selinux.te',`

selinux_newrole_sigchld(sendmail_t)

')

optional_policy(`udev.te', `

udev_read_database(sendmail_t)

')

ifdef(`TODO',`

optional_policy(`rhgb.te', `

allow sendmail_t rhgb_t:process sigchld;

allow sendmail_t rhgb_t:fd use;

allow sendmail_t rhgb_t:fifo_file { read write };

')

allow sendmail_t proc_t:dir r_dir_perms;

allow sendmail_t proc_t:lnk_file read;

dontaudit sendmail_t unpriv_userdomain:fd use;

allow sendmail_t autofs_t:dir { search getattr };

dontaudit sendmail_t sysadm_home_dir_t:dir search;

can_ypbind(sendmail_t)

#

#  Need this transition to create /etc/aliases.db 

#

ifdef(`distro_redhat', `

ifdef(`rpm.te', `

domain_auto_trans(rpm_script_t, sendmail_exec_t, system_mail_t)

')

')

allow sendmail_t etc_mail_t:dir rw_dir_perms;

allow sendmail_t etc_mail_t:file create_file_perms;

# for the start script to run make -C /etc/mail

allow initrc_t etc_mail_t:dir rw_dir_perms;

allow initrc_t etc_mail_t:file create_file_perms;

allow system_mail_t initrc_t:fd use;

allow system_mail_t initrc_t:fifo_file write;

# When sendmail runs as user_mail_domain, it needs some extra permissions

# to update /etc/mail/statistics.

allow user_mail_domain etc_mail_t:file rw_file_perms;

# Silently deny attempts to access /root.

dontaudit system_mail_t { staff_home_dir_t sysadm_home_dir_t}:dir { getattr search };

# Run procmail in its own domain, if defined.

ifdef(`procmail.te',`

corecommands_search_general_programs_directory(sendmail_t)

procmail_transition(sendmail_t)

domain_auto_trans(system_mail_t, procmail_exec_t, procmail_t)

')

dontaudit sendmail_t admin_tty_type:chr_file { getattr ioctl };

') dnl end TODO