Security-Enhanced Linux secures the gpg_web processes via flexible mandatory access control.
The gpg_web processes execute with the gpg_web_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier.
For example:
ps -eZ | grep gpg_web_t
The gpg_web_t SELinux type can be entered via the gpg_exec_t file type.
The default entrypoint paths for the gpg_web_t domain are the following:
/usr/bin/gpg(2)?, /usr/lib/gnupg/.*, /usr/bin/gpgsm
You can see the context of a process using the -Z option to psP Policy governs the access confined processes have to files. SELinux gpg_web policy is very flexible allowing users to setup their gpg_web processes in as secure a method as possible.
The following process types are defined for gpg_web:
gpg_web_t
Note: semanage permissive -a gpg_web_t can be used to make the process type gpg_web_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated.
If you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. Enabled by default.
setsebool -P fips_mode 1
The SELinux process type gpg_web_t can manage files labeled with the following file types. The paths listed are the default paths for these file types. Note the processes UID still need to have DAC permissions.
httpd_sys_rw_content_t
/etc/rt(/.*)?
/etc/glpi(/.*)?
/etc/horde(/.*)?
/etc/drupal.*
/etc/z-push(/.*)?
/var/lib/svn(/.*)?
/var/www/svn(/.*)?
/etc/owncloud(/.*)?
/var/www/html(/.*)?/uploads(/.*)?
/var/www/html(/.*)?/wp-content(/.*)?
/var/www/html(/.*)?/wp_backups(/.*)?
/var/www/html(/.*)?/sites/default/files(/.*)?
/var/www/html(/.*)?/sites/default/settings.php
/etc/mock/koji(/.*)?
/etc/nextcloud(/.*)?
/var/lib/drupal.*
/etc/zabbix/web(/.*)?
/var/lib/moodle(/.*)?
/var/log/z-push(/.*)?
/var/spool/gosa(/.*)?
/etc/WebCalendar(/.*)?
/usr/share/joomla(/.*)?
/var/lib/dokuwiki(/.*)?
/var/lib/owncloud(/.*)?
/var/spool/viewvc(/.*)?
/var/lib/nextcloud(/.*)?
/var/lib/pootle/po(/.*)?
/var/lib/phpMyAdmin(/.*)?
/var/www/moodledata(/.*)?
/srv/gallery2/smarty(/.*)?
/var/www/moodle/data(/.*)?
/var/lib/graphite-web(/.*)?
/var/log/shibboleth-www(/.*)?
/var/www/gallery/albums(/.*)?
/var/www/html/owncloud/data(/.*)?
/var/www/html/nextcloud/data(/.*)?
/usr/share/wordpress-mu/wp-content(/.*)?
/usr/share/wordpress/wp-content/upgrade(/.*)?
/usr/share/wordpress/wp-content/uploads(/.*)?
/var/www/html/configuration.php
public_content_rw_t
/var/spool/abrt-upload(/.*)?
/storage/local/public
/storage/local/public(/.*)?
semanage fcontext -a -t public_content_t "/var/gpg_web(/.*)?"
restorecon -F -R -v /var/gpg_web
semanage fcontext -a -t public_content_rw_t "/var/gpg_web/incoming(/.*)?"
restorecon -F -R -v /var/gpg_web/incoming
setsebool -P gpg_web_anon_write 1
If you want to allow gpg web domain to modify public files used for public file transfer services., you must turn on the gpg_web_anon_write boolean.
setsebool -P gpg_web_anon_write 1
semanage permissive can also be used to manipulate whether or not a process type is permissive.
semanage module can also be used to enable/disable/install/remove policy modules.
semanage boolean can also be used to manipulate the booleans
system-config-selinux is a GUI tool available to customize SELinux policy settings.