freebsd-src/libexec/rc/rc.d/sshd
Alexander Leidinger f99f0ee14e rc.d: add a service jails config to all base system services
This gives more permissions to services (e.g. network access to
services which require this) when they are started as an automatic
service jail.

The sshd patch is important for the sshd-related functionality as
described in the man-page in the service jails part.

The location of the added env vars is supposed to allow overriding them
in rc.conf, and to hard-disable the use of svcj for some parts where it
doesn't make sense or will not work.

Only a subset of all of the services are fully tested (I'm running this
since more than a year with various services started as service jails).
The untested parts should be most of the time ok, in some edge-cases
more permissions are needed inside the service jail.
Differential Revision:	https://reviews.freebsd.org/D40371
2024-05-22 15:41:49 +02:00

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#!/bin/sh
#
#
# PROVIDE: sshd
# REQUIRE: LOGIN FILESYSTEMS
# KEYWORD: shutdown
. /etc/rc.subr
name="sshd"
desc="Secure Shell Daemon"
rcvar="sshd_enable"
command="/usr/sbin/${name}"
keygen_cmd="sshd_keygen"
start_precmd="sshd_precmd"
reload_precmd="sshd_configtest"
restart_precmd="sshd_configtest"
configtest_cmd="sshd_configtest"
pidfile="/var/run/${name}.pid"
extra_commands="configtest keygen reload"
: ${sshd_rsa_enable:="yes"}
: ${sshd_dsa_enable:="no"}
: ${sshd_ecdsa_enable:="yes"}
: ${sshd_ed25519_enable:="yes"}
# sshd in a jail would not see other jails. As such exclude it from
# svcj_all_enable="YES" by setting sshd_svcj to NO. This allows to
# enable it in rc.conf.
: ${sshd_svcj:="NO"}
: ${sshd_svcj_options:="net_basic"}
sshd_keygen_alg()
{
local alg=$1
local ALG="$(echo $alg | tr a-z A-Z)"
local keyfile
if ! checkyesno "sshd_${alg}_enable" ; then
return 0
fi
case $alg in
rsa|dsa|ecdsa|ed25519)
keyfile="/etc/ssh/ssh_host_${alg}_key"
;;
*)
return 1
;;
esac
if [ -f "${keyfile}" ] ; then
info "$ALG host key exists."
return 0
fi
if [ ! -x /usr/bin/ssh-keygen ] ; then
warn "/usr/bin/ssh-keygen does not exist."
return 1
fi
echo "Generating $ALG host key."
/usr/bin/ssh-keygen -q -t $alg -f "$keyfile" -N ""
/usr/bin/ssh-keygen -l -f "$keyfile.pub"
}
sshd_keygen()
{
sshd_keygen_alg rsa
sshd_keygen_alg dsa
sshd_keygen_alg ecdsa
sshd_keygen_alg ed25519
}
sshd_configtest()
{
echo "Performing sanity check on ${name} configuration."
eval ${command} ${sshd_flags} -t
}
sshd_precmd()
{
run_rc_command keygen
run_rc_command configtest
}
load_rc_config $name
run_rc_command "$1"