904 lines
20 KiB
Plaintext
904 lines
20 KiB
Plaintext
## <summary>Policy common to all email tranfer agents.</summary>
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########################################
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## <summary>
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## MTA stub interface. No access allowed.
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## </summary>
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## <param name="domain" optional="true">
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## <summary>
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## N/A
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## </summary>
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## </param>
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#
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interface(`mta_stub',`
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gen_require(`
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type sendmail_exec_t;
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')
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')
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#######################################
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## <summary>
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## Basic mail transfer agent domain template.
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## </summary>
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## <desc>
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## <p>
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## This template creates a derived domain which is
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## a email transfer agent, which sends mail on
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## behalf of the user.
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## </p>
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## <p>
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## This is the basic types and rules, common
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## to the system agent and user agents.
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## </p>
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## </desc>
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## <param name="domain_prefix">
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## <summary>
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## The prefix of the domain (e.g., user
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## is the prefix for user_t).
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## </summary>
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## </param>
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#
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template(`mta_base_mail_template',`
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gen_require(`
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attribute user_mail_domain;
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type sendmail_exec_t;
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')
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##############################
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#
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# $1_mail_t declarations
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#
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type $1_mail_t, user_mail_domain;
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application_domain($1_mail_t,sendmail_exec_t)
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type $1_mail_tmp_t;
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files_tmp_file($1_mail_tmp_t)
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##############################
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#
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# $1_mail_t local policy
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#
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allow $1_mail_t self:capability { setuid setgid chown };
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allow $1_mail_t self:process { signal_perms setrlimit };
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allow $1_mail_t self:tcp_socket create_socket_perms;
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# re-exec itself
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can_exec($1_mail_t, sendmail_exec_t)
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allow $1_mail_t sendmail_exec_t:lnk_file read_lnk_file_perms;
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kernel_read_kernel_sysctls($1_mail_t)
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corenet_all_recvfrom_unlabeled($1_mail_t)
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corenet_all_recvfrom_netlabel($1_mail_t)
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corenet_tcp_sendrecv_all_if($1_mail_t)
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corenet_tcp_sendrecv_all_nodes($1_mail_t)
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corenet_tcp_sendrecv_all_ports($1_mail_t)
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corenet_tcp_connect_all_ports($1_mail_t)
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corenet_tcp_connect_smtp_port($1_mail_t)
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corenet_sendrecv_smtp_client_packets($1_mail_t)
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corecmd_exec_bin($1_mail_t)
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files_read_etc_files($1_mail_t)
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files_search_spool($1_mail_t)
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# It wants to check for nscd
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files_dontaudit_search_pids($1_mail_t)
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libs_use_ld_so($1_mail_t)
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libs_use_shared_libs($1_mail_t)
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logging_send_syslog_msg($1_mail_t)
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miscfiles_read_localization($1_mail_t)
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sysnet_read_config($1_mail_t)
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sysnet_dns_name_resolve($1_mail_t)
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optional_policy(`
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nis_use_ypbind($1_mail_t)
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')
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optional_policy(`
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nscd_socket_use($1_mail_t)
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')
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optional_policy(`
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postfix_domtrans_user_mail_handler($1_mail_t)
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')
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optional_policy(`
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procmail_exec($1_mail_t)
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')
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optional_policy(`
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qmail_domtrans_inject($1_mail_t)
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')
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optional_policy(`
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gen_require(`
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type etc_mail_t, mail_spool_t, mqueue_spool_t;
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')
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manage_dirs_pattern($1_mail_t,$1_mail_tmp_t,$1_mail_tmp_t)
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manage_files_pattern($1_mail_t,$1_mail_tmp_t,$1_mail_tmp_t)
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files_tmp_filetrans($1_mail_t, $1_mail_tmp_t, { file dir })
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allow $1_mail_t etc_mail_t:dir { getattr search };
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# Write to /var/spool/mail and /var/spool/mqueue.
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manage_files_pattern($1_mail_t,mail_spool_t,mail_spool_t)
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manage_files_pattern($1_mail_t,mqueue_spool_t,mqueue_spool_t)
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# Check available space.
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fs_getattr_xattr_fs($1_mail_t)
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files_read_etc_runtime_files($1_mail_t)
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# Write to /var/log/sendmail.st
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sendmail_manage_log($1_mail_t)
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sendmail_create_log($1_mail_t)
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')
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')
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#######################################
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## <summary>
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## The per role template for the mta module.
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## </summary>
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## <desc>
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## <p>
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## This template creates a derived domain which is
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## a email transfer agent, which sends mail on
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## behalf of the user.
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## </p>
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## <p>
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## This template is invoked automatically for each user, and
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## generally does not need to be invoked directly
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## by policy writers.
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## </p>
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## </desc>
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## <param name="userdomain_prefix">
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## <summary>
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## The prefix of the user domain (e.g., user
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## is the prefix for user_t).
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## </summary>
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## </param>
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## <param name="user_domain">
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## <summary>
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## The type of the user domain.
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## </summary>
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## </param>
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## <param name="user_role">
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## <summary>
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## The role associated with the user domain.
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## </summary>
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## </param>
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#
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template(`mta_per_role_template',`
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gen_require(`
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attribute mta_user_agent;
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attribute mailserver_delivery;
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')
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##############################
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#
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# Declarations
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#
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mta_base_mail_template($1)
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role $3 types $1_mail_t;
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##############################
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#
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# $1_mail_t local policy
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#
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# Transition from the user domain to the derived domain.
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domtrans_pattern($2, sendmail_exec_t, $1_mail_t)
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allow $2 sendmail_exec_t:lnk_file { getattr read };
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domain_use_interactive_fds($1_mail_t)
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userdom_use_user_terminals($1,$1_mail_t)
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# Write to the user domain tty. cjp: why?
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userdom_use_user_terminals($1,mta_user_agent)
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# Create dead.letter in user home directories.
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userdom_manage_user_home_content_files($1,$1_mail_t)
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userdom_user_home_dir_filetrans_user_home_content($1,$1_mail_t,file)
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# for reading .forward - maybe we need a new type for it?
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# also for delivering mail to maildir
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userdom_manage_user_home_content_dirs($1,mailserver_delivery)
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userdom_manage_user_home_content_files($1,mailserver_delivery)
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userdom_manage_user_home_content_symlinks($1,mailserver_delivery)
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userdom_manage_user_home_content_pipes($1,mailserver_delivery)
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userdom_manage_user_home_content_sockets($1,mailserver_delivery)
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userdom_user_home_dir_filetrans_user_home_content($1,mailserver_delivery,{ dir file lnk_file fifo_file sock_file })
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# Read user temporary files.
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userdom_read_user_tmp_files($1,$1_mail_t)
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userdom_dontaudit_append_user_tmp_files($1,$1_mail_t)
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# cjp: this should probably be read all user tmp
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# files in an appropriate place for mta_user_agent
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userdom_read_user_tmp_files($1,mta_user_agent)
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tunable_policy(`use_samba_home_dirs',`
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fs_manage_cifs_files($1_mail_t)
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fs_manage_cifs_symlinks($1_mail_t)
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')
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optional_policy(`
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allow $1_mail_t self:capability dac_override;
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# Read user temporary files.
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# postfix seems to need write access if the file handle is opened read/write
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userdom_rw_user_tmp_files($1,$1_mail_t)
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postfix_read_config($1_mail_t)
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postfix_list_spool($1_mail_t)
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')
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')
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########################################
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## <summary>
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## Provide extra permissions for admin users
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## mail domain.
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## </summary>
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## <param name="userdomain_prefix">
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## <summary>
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## The prefix of the user domain (e.g., user
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## is the prefix for user_t).
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## </summary>
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## </param>
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## <param name="user_domain">
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## <summary>
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## The type of the user domain.
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## </summary>
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## </param>
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## <rolecap/>
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#
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template(`mta_admin_template',`
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gen_require(`
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type $1_mail_t;
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')
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# allow the sysadmin to do "mail someone < /home/user/whatever"
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userdom_read_unpriv_users_home_content_files($1_mail_t)
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optional_policy(`
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gen_require(`
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attribute mta_user_agent;
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type etc_aliases_t;
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')
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allow mta_user_agent $2:fifo_file { read write };
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manage_dirs_pattern($1_mail_t,etc_aliases_t,etc_aliases_t)
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manage_files_pattern($1_mail_t,etc_aliases_t,etc_aliases_t)
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manage_lnk_files_pattern($1_mail_t,etc_aliases_t,etc_aliases_t)
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manage_fifo_files_pattern($1_mail_t,etc_aliases_t,etc_aliases_t)
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manage_sock_files_pattern($1_mail_t,etc_aliases_t,etc_aliases_t)
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files_etc_filetrans($1_mail_t,etc_aliases_t,{ file lnk_file sock_file fifo_file })
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# postfix needs this for newaliases
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files_getattr_tmp_dirs($1_mail_t)
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postfix_exec_master($1_mail_t)
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ifdef(`distro_redhat',`
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# compatability for old default main.cf
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postfix_config_filetrans($1_mail_t,etc_aliases_t,{ dir file lnk_file sock_file fifo_file })
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')
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')
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')
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########################################
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## <summary>
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## Make the specified domain usable for a mail server.
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## </summary>
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## <param name="type">
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## <summary>
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## Type to be used as a mail server domain.
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## </summary>
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## </param>
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#
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interface(`mta_mailserver',`
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gen_require(`
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attribute mailserver_domain;
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')
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init_daemon_domain($1,$2)
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typeattribute $1 mailserver_domain;
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')
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########################################
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## <summary>
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## Modified mailserver interface for
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## sendmail daemon use.
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## </summary>
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## <desc>
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## <p>
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## A modified MTA mail server interface for
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## the sendmail program. It's design does
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## not fit well with policy, and using the
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## regular interface causes a type_transition
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## conflict if direct running of init scripts
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## is enabled.
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## </p>
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## <p>
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## This interface should most likely only be used
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## by the sendmail policy.
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## </p>
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## </desc>
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## <param name="domain">
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## <summary>
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## The type to be used for the mail server.
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## </summary>
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## </param>
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## <param name="entry_point">
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## <summary>
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## The type to be used for the domain entry point program.
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## </summary>
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## </param>
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interface(`mta_sendmail_mailserver',`
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gen_require(`
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attribute mailserver_domain;
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type sendmail_exec_t;
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')
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init_system_domain($1,sendmail_exec_t)
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typeattribute $1 mailserver_domain;
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')
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#######################################
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## <summary>
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## Make a type a mailserver type used
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## for sending mail.
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## </summary>
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## <param name="domain">
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## <summary>
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## Mail server domain type used for sending mail.
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## </summary>
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## </param>
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#
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interface(`mta_mailserver_sender',`
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gen_require(`
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attribute mailserver_sender;
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')
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typeattribute $1 mailserver_sender;
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')
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#######################################
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## <summary>
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## Make a type a mailserver type used
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## for delivering mail to local users.
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## </summary>
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## <param name="domain">
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## <summary>
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## Mail server domain type used for delivering mail.
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## </summary>
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## </param>
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#
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interface(`mta_mailserver_delivery',`
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gen_require(`
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attribute mailserver_delivery;
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type mail_spool_t;
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')
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typeattribute $1 mailserver_delivery;
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allow $1 mail_spool_t:dir list_dir_perms;
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create_files_pattern($1,mail_spool_t,mail_spool_t)
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read_files_pattern($1,mail_spool_t,mail_spool_t)
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create_lnk_files_pattern($1,mail_spool_t,mail_spool_t)
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read_lnk_files_pattern($1,mail_spool_t,mail_spool_t)
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optional_policy(`
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dovecot_manage_spool($1)
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')
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optional_policy(`
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# so MTA can access /var/lib/mailman/mail/wrapper
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files_search_var_lib($1)
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mailman_domtrans($1)
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mailman_read_data_symlinks($1)
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')
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')
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#######################################
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## <summary>
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## Make a type a mailserver type used
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## for sending mail on behalf of local
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## users to the local mail spool.
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## </summary>
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## <param name="domain">
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## <summary>
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## Mail server domain type used for sending local mail.
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## </summary>
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## </param>
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#
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interface(`mta_mailserver_user_agent',`
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gen_require(`
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attribute mta_user_agent;
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')
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typeattribute $1 mta_user_agent;
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optional_policy(`
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# apache should set close-on-exec
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apache_dontaudit_rw_stream_sockets($1)
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apache_dontaudit_rw_sys_script_stream_sockets($1)
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')
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')
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########################################
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## <summary>
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## Send mail from the system.
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## </summary>
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## <param name="domain">
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## <summary>
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## Domain allowed access.
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## </summary>
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## </param>
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#
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interface(`mta_send_mail',`
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gen_require(`
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attribute mta_user_agent;
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type system_mail_t, sendmail_exec_t;
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')
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allow $1 sendmail_exec_t:lnk_file read_lnk_file_perms;
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domain_auto_trans($1, sendmail_exec_t, system_mail_t)
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allow $1 system_mail_t:fd use;
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allow system_mail_t $1:fd use;
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allow system_mail_t $1:fifo_file rw_file_perms;
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allow system_mail_t $1:process sigchld;
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allow mta_user_agent $1:fd use;
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allow mta_user_agent $1:process sigchld;
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allow mta_user_agent $1:fifo_file { read write };
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')
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########################################
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## <summary>
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## Execute send mail in a specified domain.
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## </summary>
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## <desc>
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## <p>
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## Execute send mail in a specified domain.
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## </p>
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## <p>
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## No interprocess communication (signals, pipes,
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## etc.) is provided by this interface since
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## the domains are not owned by this module.
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## </p>
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## </desc>
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## <param name="source_domain">
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## <summary>
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## Domain to transition from.
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## </summary>
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## </param>
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## <param name="target_domain">
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## <summary>
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## Domain to transition to.
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## </summary>
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## </param>
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#
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interface(`mta_sendmail_domtrans',`
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gen_require(`
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type sendmail_exec_t;
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')
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files_search_usr($1)
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corecmd_read_bin_symlinks($1)
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domain_auto_trans($1,sendmail_exec_t,$2)
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')
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########################################
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## <summary>
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## Execute sendmail in the caller domain.
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## </summary>
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## <param name="domain">
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## <summary>
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## Domain allowed access.
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## </summary>
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## </param>
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#
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interface(`mta_sendmail_exec',`
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gen_require(`
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type sendmail_exec_t;
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')
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can_exec($1, sendmail_exec_t)
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')
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########################################
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## <summary>
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## Read mail server configuration.
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## </summary>
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## <param name="domain">
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## <summary>
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## Domain allowed access.
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## </summary>
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## </param>
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## <rolecap/>
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#
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interface(`mta_read_config',`
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gen_require(`
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type etc_mail_t;
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')
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files_search_etc($1)
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allow $1 etc_mail_t:dir list_dir_perms;
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read_files_pattern($1,etc_mail_t,etc_mail_t)
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read_lnk_files_pattern($1,etc_mail_t,etc_mail_t)
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')
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########################################
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## <summary>
|
|
## Read mail address aliases.
|
|
## </summary>
|
|
## <param name="domain">
|
|
## <summary>
|
|
## Domain allowed access.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
interface(`mta_read_aliases',`
|
|
gen_require(`
|
|
type etc_aliases_t;
|
|
')
|
|
|
|
files_search_etc($1)
|
|
allow $1 etc_aliases_t:file read_file_perms;
|
|
')
|
|
|
|
########################################
|
|
## <summary>
|
|
## Type transition files created in /etc
|
|
## to the mail address aliases type.
|
|
## </summary>
|
|
## <param name="domain">
|
|
## <summary>
|
|
## Domain allowed access.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
interface(`mta_etc_filetrans_aliases',`
|
|
gen_require(`
|
|
type etc_aliases_t;
|
|
')
|
|
|
|
files_etc_filetrans($1,etc_aliases_t, file)
|
|
')
|
|
|
|
########################################
|
|
## <summary>
|
|
## Read and write mail aliases.
|
|
## </summary>
|
|
## <param name="domain">
|
|
## <summary>
|
|
## Domain allowed access.
|
|
## </summary>
|
|
## </param>
|
|
## <rolecap/>
|
|
#
|
|
interface(`mta_rw_aliases',`
|
|
gen_require(`
|
|
type etc_aliases_t;
|
|
')
|
|
|
|
files_search_etc($1)
|
|
allow $1 etc_aliases_t:file { rw_file_perms setattr };
|
|
')
|
|
|
|
#######################################
|
|
## <summary>
|
|
## Do not audit attempts to read and write TCP
|
|
## sockets of mail delivery domains.
|
|
## </summary>
|
|
## <param name="domain">
|
|
## <summary>
|
|
## Mail server domain.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
interface(`mta_dontaudit_rw_delivery_tcp_sockets',`
|
|
gen_require(`
|
|
attribute mailserver_delivery;
|
|
')
|
|
|
|
dontaudit $1 mailserver_delivery:tcp_socket { read write };
|
|
')
|
|
|
|
#######################################
|
|
## <summary>
|
|
## Connect to all mail servers over TCP. (Deprecated)
|
|
## </summary>
|
|
## <param name="domain">
|
|
## <summary>
|
|
## Mail server domain.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
interface(`mta_tcp_connect_all_mailservers',`
|
|
refpolicywarn(`$0($*) has been deprecated.')
|
|
')
|
|
|
|
#######################################
|
|
## <summary>
|
|
## Do not audit attempts to read a symlink
|
|
## in the mail spool.
|
|
## </summary>
|
|
## <param name="domain">
|
|
## <summary>
|
|
## Domain allowed access.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
interface(`mta_dontaudit_read_spool_symlinks',`
|
|
gen_require(`
|
|
type mail_spool_t;
|
|
')
|
|
|
|
dontaudit $1 mail_spool_t:lnk_file read;
|
|
')
|
|
|
|
########################################
|
|
## <summary>
|
|
## Get the attributes of mail spool files.
|
|
## </summary>
|
|
## <param name="domain">
|
|
## <summary>
|
|
## Domain allowed access.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
interface(`mta_getattr_spool',`
|
|
gen_require(`
|
|
type mail_spool_t;
|
|
')
|
|
|
|
files_search_spool($1)
|
|
allow $1 mail_spool_t:dir list_dir_perms;
|
|
allow $1 mail_spool_t:lnk_file read;
|
|
allow $1 mail_spool_t:file getattr;
|
|
')
|
|
|
|
########################################
|
|
## <summary>
|
|
## Do not audit attempts to get the attributes
|
|
## of mail spool files.
|
|
## </summary>
|
|
## <param name="domain">
|
|
## <summary>
|
|
## Domain to not audit.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
interface(`mta_dontaudit_getattr_spool_files',`
|
|
gen_require(`
|
|
type mail_spool_t;
|
|
')
|
|
|
|
files_dontaudit_search_spool($1)
|
|
dontaudit $1 mail_spool_t:dir search;
|
|
dontaudit $1 mail_spool_t:lnk_file read;
|
|
dontaudit $1 mail_spool_t:file getattr;
|
|
')
|
|
|
|
#######################################
|
|
## <summary>
|
|
## Create private objects in the
|
|
## mail spool directory.
|
|
## </summary>
|
|
## <param name="domain">
|
|
## <summary>
|
|
## Domain allowed access.
|
|
## </summary>
|
|
## </param>
|
|
## <param name="private type">
|
|
## <summary>
|
|
## The type of the object to be created.
|
|
## </summary>
|
|
## </param>
|
|
## <param name="object">
|
|
## <summary>
|
|
## The object class of the object being created.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
interface(`mta_spool_filetrans',`
|
|
gen_require(`
|
|
type mail_spool_t;
|
|
')
|
|
|
|
files_search_spool($1)
|
|
filetrans_pattern($1,mail_spool_t,$2,$3)
|
|
')
|
|
|
|
########################################
|
|
## <summary>
|
|
## Read and write the mail spool.
|
|
## </summary>
|
|
## <param name="domain">
|
|
## <summary>
|
|
## Domain allowed access.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
interface(`mta_rw_spool',`
|
|
gen_require(`
|
|
type mail_spool_t;
|
|
')
|
|
|
|
files_search_spool($1)
|
|
allow $1 mail_spool_t:dir list_dir_perms;
|
|
allow $1 mail_spool_t:file setattr;
|
|
rw_files_pattern($1,mail_spool_t,mail_spool_t)
|
|
read_lnk_files_pattern($1,mail_spool_t,mail_spool_t)
|
|
')
|
|
|
|
#######################################
|
|
## <summary>
|
|
## Create, read, and write the mail spool.
|
|
## </summary>
|
|
## <param name="domain">
|
|
## <summary>
|
|
## Domain allowed access.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
interface(`mta_append_spool',`
|
|
gen_require(`
|
|
type mail_spool_t;
|
|
')
|
|
|
|
files_search_spool($1)
|
|
allow $1 mail_spool_t:dir list_dir_perms;
|
|
create_files_pattern($1,mail_spool_t,mail_spool_t)
|
|
write_files_pattern($1,mail_spool_t,mail_spool_t)
|
|
read_lnk_files_pattern($1,mail_spool_t,mail_spool_t)
|
|
')
|
|
|
|
#######################################
|
|
## <summary>
|
|
## Delete from the mail spool.
|
|
## </summary>
|
|
## <param name="domain">
|
|
## <summary>
|
|
## Domain allowed access.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
interface(`mta_delete_spool',`
|
|
gen_require(`
|
|
type mail_spool_t;
|
|
')
|
|
|
|
files_search_spool($1)
|
|
delete_files_pattern($1,mail_spool_t,mail_spool_t)
|
|
')
|
|
|
|
########################################
|
|
## <summary>
|
|
## Create, read, write, and delete mail spool files.
|
|
## </summary>
|
|
## <param name="domain">
|
|
## <summary>
|
|
## Domain allowed access.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
interface(`mta_manage_spool',`
|
|
gen_require(`
|
|
type mail_spool_t;
|
|
')
|
|
|
|
files_search_spool($1)
|
|
manage_dirs_pattern($1,mail_spool_t,mail_spool_t)
|
|
manage_files_pattern($1,mail_spool_t,mail_spool_t)
|
|
manage_lnk_files_pattern($1,mail_spool_t,mail_spool_t)
|
|
')
|
|
|
|
########################################
|
|
## <summary>
|
|
## Search mail queue dirs.
|
|
## </summary>
|
|
## <param name="domain">
|
|
## <summary>
|
|
## Domain allowed access.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
interface(`mta_search_queue',`
|
|
gen_require(`
|
|
type mqueue_spool_t;
|
|
')
|
|
|
|
files_search_spool($1)
|
|
allow $1 mqueue_spool_t:dir search_dir_perms;
|
|
')
|
|
|
|
#######################################
|
|
## <summary>
|
|
## Do not audit attempts to read and
|
|
## write the mail queue.
|
|
## </summary>
|
|
## <param name="domain">
|
|
## <summary>
|
|
## Domain to not audit.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
interface(`mta_dontaudit_rw_queue',`
|
|
gen_require(`
|
|
type mqueue_spool_t;
|
|
')
|
|
|
|
dontaudit $1 mqueue_spool_t:dir search_dir_perms;
|
|
dontaudit $1 mqueue_spool_t:file { getattr read write };
|
|
')
|
|
|
|
########################################
|
|
## <summary>
|
|
## Create, read, write, and delete
|
|
## mail queue files.
|
|
## </summary>
|
|
## <param name="domain">
|
|
## <summary>
|
|
## Domain allowed access.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
interface(`mta_manage_queue',`
|
|
gen_require(`
|
|
type mqueue_spool_t;
|
|
')
|
|
|
|
files_search_spool($1)
|
|
manage_files_pattern($1,mqueue_spool_t,mqueue_spool_t)
|
|
')
|
|
|
|
#######################################
|
|
## <summary>
|
|
## Read sendmail binary.
|
|
## </summary>
|
|
## <param name="domain">
|
|
## <summary>
|
|
## Domain allowed access.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
# cjp: added for postfix
|
|
interface(`mta_read_sendmail_bin',`
|
|
gen_require(`
|
|
type sendmail_exec_t;
|
|
')
|
|
|
|
allow $1 sendmail_exec_t:file read_file_perms;
|
|
')
|
|
|
|
#######################################
|
|
## <summary>
|
|
## Read and write unix domain stream sockets
|
|
## of user mail domains.
|
|
## </summary>
|
|
## <param name="domain">
|
|
## <summary>
|
|
## Domain allowed access.
|
|
## </summary>
|
|
## </param>
|
|
#
|
|
interface(`mta_rw_user_mail_stream_sockets',`
|
|
gen_require(`
|
|
attribute user_mail_domain;
|
|
')
|
|
|
|
allow $1 user_mail_domain:unix_stream_socket rw_socket_perms;
|
|
')
|