gpg_agent_selinux(8) SELinux Policy gpg_agent gpg_agent_selinux(8)NAMEgpg_agent_selinux - Security Enhanced Linux Policy for the gpg_agent
processes
DESCRIPTION
Security-Enhanced Linux secures the gpg_agent processes via flexible
mandatory access control.
The gpg_agent processes execute with the gpg_agent_t SELinux type. You
can check if you have these processes running by executing the ps com‐
mand with the -Z qualifier.
For example:
ps -eZ | grep gpg_agent_t
ENTRYPOINTS
The gpg_agent_t SELinux type can be entered via the gpg_agent_exec_t
file type.
The default entrypoint paths for the gpg_agent_t domain are the follow‐
ing:
/usr/bin/gpg-agent
PROCESS TYPES
SELinux defines process types (domains) for each process running on the
system
You can see the context of a process using the -Z option to ps
Policy governs the access confined processes have to files. SELinux
gpg_agent policy is very flexible allowing users to setup their
gpg_agent processes in as secure a method as possible.
The following process types are defined for gpg_agent:
gpg_agent_t
Note: semanage permissive -a gpg_agent_t can be used to make the
process type gpg_agent_t permissive. SELinux does not deny access to
permissive process types, but the AVC (SELinux denials) messages are
still generated.
BOOLEANS
SELinux policy is customizable based on least access required.
gpg_agent policy is extremely flexible and has several booleans that
allow you to manipulate the policy and run gpg_agent with the tightest
access possible.
If you want to allow usage of the gpg-agent --write-env-file option.
This also allows gpg-agent to manage user files, you must turn on the
gpg_agent_env_file boolean. Disabled by default.
setsebool -P gpg_agent_env_file 1
If you want to deny any process from ptracing or debugging any other
processes, you must turn on the deny_ptrace boolean. Enabled by
default.
setsebool -P deny_ptrace 1
If you want to allow all domains to use other domains file descriptors,
you must turn on the domain_fd_use boolean. Enabled by default.
setsebool -P domain_fd_use 1
If you want to allow all domains to have the kernel load modules, you
must turn on the domain_kernel_load_modules boolean. Disabled by
default.
setsebool -P domain_kernel_load_modules 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 enable reading of urandom for all domains, you must turn
on the global_ssp boolean. Disabled by default.
setsebool -P global_ssp 1
If you want to support ecryptfs home directories, you must turn on the
use_ecryptfs_home_dirs boolean. Disabled by default.
setsebool -P use_ecryptfs_home_dirs 1
If you want to support fusefs home directories, you must turn on the
use_fusefs_home_dirs boolean. Disabled by default.
setsebool -P use_fusefs_home_dirs 1
If you want to support NFS home directories, you must turn on the
use_nfs_home_dirs boolean. Disabled by default.
setsebool -P use_nfs_home_dirs 1
If you want to support SAMBA home directories, you must turn on the
use_samba_home_dirs boolean. Disabled by default.
setsebool -P use_samba_home_dirs 1
MANAGED FILES
The SELinux process type gpg_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.
cifs_t
ecryptfs_t
/home/[^/]*/.Private(/.*)?
/home/[^/]*/.ecryptfs(/.*)?
fusefs_t
/var/run/[^/]*/gvfs
gnome_home_type
gpg_agent_tmp_t
/home/[^/]*/.gnupg/log-socket
gpg_secret_t
/root/.gnupg(/.+)?
/etc/mail/spamassassin/sa-update-keys(/.*)?
/home/[^/]*/.gnupg(/.+)?
nfs_t
user_home_t
/home/[^/]*/.+
FILE CONTEXTS
SELinux requires files to have an extended attribute to define the file
type.
You can see the context of a file using the -Z option to ls
Policy governs the access confined processes have to these files.
SELinux gpg_agent policy is very flexible allowing users to setup their
gpg_agent processes in as secure a method as possible.
STANDARD FILE CONTEXT
SELinux defines the file context types for the gpg_agent, if you wanted
to store files with these types in a diffent paths, you need to execute
the semanage command to sepecify alternate labeling and then use
restorecon to put the labels on disk.
semanage fcontext -a -t gpg_agent_exec_t '/srv/gpg_agent/content(/.*)?'
restorecon -R -v /srv/mygpg_agent_content
Note: SELinux often uses regular expressions to specify labels that
match multiple files.
The following file types are defined for gpg_agent:
gpg_agent_exec_t
- Set files with the gpg_agent_exec_t type, if you want to transition
an executable to the gpg_agent_t domain.
gpg_agent_tmp_t
- Set files with the gpg_agent_tmp_t type, if you want to store gpg
agent temporary files in the /tmp directories.
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 data‐
base. You will need to use restorecon to apply the labels.
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 pol‐
icy modules.
semanage boolean can also be used to manipulate the booleans
system-config-selinux is a GUI tool available to customize SELinux pol‐
icy settings.
AUTHOR
This manual page was auto-generated using sepolicy manpage .
SEE ALSOselinux(8), gpg_agent(8), semanage(8), restorecon(8), chcon(1), sepol‐
icy(8) , setsebool(8)gpg_agent 13-11-20 gpg_agent_selinux(8)
