systemd...selinux(8)

systemd...selinux(8) 💅✨

okay bestie, buckle up — this is the systemd_passwd_agent_selinux page from the SELinux Policy systemd_passwd_agent manual, and honestly? it's giving security, it's giving structure, it's giving "your files have vibes and those vibes are labels." let's go 🫶

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🌸 NAME 🌸

systemd_passwd_agent_selinux — the Security Enhanced Linux Policy for the systemd_passwd_agent processes. that's it, that's the whole name, she's iconic and she knows it 💖

✨ DESCRIPTION ✨

so Security-Enhanced Linux secures the systemd_passwd_agent processes via flexible mandatory access control. literally MAC, no cap, everyone's fav acronym 🔥

the systemd_passwd_agent processes execute with the systemd_passwd_agent_t SELinux type, and if you wanna check whether you've got these processes running, you just run the ps command with the -Z qualifier. easy peek, no stress 💅

for example:

ps -eZ | grep systemd_passwd_agent_t

🦋 ENTRYPOINTS 🦋

so the systemd_passwd_agent_t SELinux type can be entered via the systemd_passwd_agent_exec_t file type — that's the doorway, the VIP entrance, the only way in 👑

the default entrypoint paths for the systemd_passwd_agent_t domain are the following:

/usr/bin/systemd-tty-ask-password-agent, /usr/bin/systemd-gnome-ask-password-agent

🎀 PROCESS TYPES 🎀

SELinux defines process types (aka domains) for each process running on the system, which is lowkey the whole personality of the system ngl 🧚

you can see the context of a process using the -Z option to ps. periodt.

policy governs the access confined processes have to files. the SELinux systemd_passwd_agent policy is very flexible, allowing users to set up their systemd_passwd_agent processes in as secure a method as possible. it's not restrictive, it's curated okay 🙈

the following process types are defined for systemd_passwd_agent:

systemd_passwd_agent_t

Note: semanage permissive -a systemd_passwd_agent_t can be used to make the process type systemd_passwd_agent_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so like, it stops yelling at you and still takes notes 📝

💜 BOOLEANS 💜

SELinux policy is customizable based on least access required. the systemd_passwd_agent policy is extremely flexible and has several booleans that let you manipulate the policy and run systemd_passwd_agent with the tightest access possible. tightest. access. possible. slay 💅

• if you want to dontaudit all daemons scheduling requests (setsched, sys_nice), you must turn on the daemons_dontaudit_scheduling boolean. Enabled by default.

setsebool -P daemons_dontaudit_scheduling 1

• 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

• if you want to allow system to run with NIS, you must turn on the nis_enabled boolean. Disabled by default.

setsebool -P nis_enabled 1

🌈 MANAGED FILES 🌈

the SELinux process type systemd_passwd_agent_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 — SELinux isn't out here doing everything for you, bestie 😭

cluster_conf_t

/etc/cluster(/.*)?

cluster_var_lib_t

/var/lib/pcsd(/.*)?
/var/lib/cluster(/.*)?
/var/lib/openais(/.*)?
/var/lib/pengine(/.*)?
/var/lib/corosync(/.*)?
/usr/lib/heartbeat(/.*)?
/var/lib/heartbeat(/.*)?
/var/lib/pacemaker(/.*)?

cluster_var_run_t

/run/crm(/.*)?
/run/cman_.*
/run/rsctmp(/.*)?
/run/aisexec.*
/run/heartbeat(/.*)?
/run/pcsd-ruby.socket
/run/corosync-qnetd(/.*)?
/run/corosync-qdevice(/.*)?
/run/pcsd.socket
/run/corosync.pid
/run/cpglockd.pid
/run/rgmanager.pid
/run/cluster/rgmanager.sk

krb5_host_rcache_t

/var/tmp/krb5_0.rcache2
/var/cache/krb5rcache(/.*)?
/var/tmp/nfs_0
/var/tmp/DNS_25
/var/tmp/host_0
/var/tmp/imap_0
/var/tmp/HTTP_23
/var/tmp/HTTP_48
/var/tmp/ldap_55
/var/tmp/ldap_487
/var/tmp/ldapmap1_0

root_t

/sysroot/.aleph-version.json
/sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
/
/initrd
/var/lib/ntp

systemd_passwd_var_run_t

/run/systemd/ask-password(/.*)?
/run/systemd/ask-password-block(/.*)?

⭐ FILE CONTEXTS ⭐

SELinux requires files to have an extended attribute to define the file type — yes, files have a whole identity beyond their name, main character energy fr fr 👑

you can see the context of a file using the -Z option to ls.

policy governs the access confined processes have to these files. the SELinux systemd_passwd_agent policy is very flexible, allowing users to set up their systemd_passwd_agent processes in as secure a method as possible. (we said it twice because it's true twice 💖)

🎀 STANDARD FILE CONTEXT 🎀

SELinux defines the file context types for systemd_passwd_agent, and if you wanted to store files with these types in different paths, you need to execute the semanage command to specify alternate labeling and then use restorecon to put the labels on disk. two steps, both essential, don't skip 🫶

semanage fcontext -a -t systemd_passwd_agent_exec_t '/srv/systemd_passwd_agent/content(/.*)?'
restorecon -R -v /srv/mysystemd_passwd_agent_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. regex girlies stay winning 🦋

the following file types are defined for systemd_passwd_agent:

systemd_passwd_agent_exec_t

• Set files with the systemd_passwd_agent_exec_t type, if you want to transition an executable to the systemd_passwd_agent_t domain.

Paths:

/usr/bin/systemd-tty-ask-password-agent, /usr/bin/systemd-gnome-ask-password-agent

Note: file context can be temporarily modified with the chcon command. if you want to permanently change the file context you need to use the semanage fcontext command. this will modify the SELinux labeling database. you will need to use restorecon to apply the labels. so like — chcon is a cute lil temporary tattoo, semanage fcontext + restorecon is the real committed thing 💀

👑 COMMANDS 👑

• semanage fcontext can also be used to manipulate default file context mappings.
• 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. (a GUI! for the visual besties! 🎨)

🌸 AUTHOR 🌸

This manual page was auto-generated using sepolicy manpage. a bot wrote it, and honestly? she ate 🤖💅

🦋 SEE ALSO 🦋

selinux(8), systemd_passwd_agent(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8)

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and that's the whole page, bestie, no notes 🫶 this was systemd_passwd_agent, dated 26-10-06, served up in the systemd...selinux(8) manual — go label something responsibly ✨💖🎀