#!/bin/bash
#
# Init file for OpenSSH server daemon
#
# chkconfig: 2345 20 25
# description: OpenSSH server daemon
#
# processname: sshd
# config: /etc/ssh/ssh_host_key
# config: /etc/ssh/ssh_host_key.pub
# config: /etc/ssh/ssh_random_seed
# config: /etc/ssh/sshd_config
# pidfile: /var/run/sshd.pid

# source function library
. /etc/rc.d/init.d/functions

# pull in sysconfig settings
[ -f /etc/sysconfig/sshd ] && . /etc/sysconfig/sshd

RETVAL=0
prog="sshd"

# Some functions to make the below more readable
KEYGEN=/usr/bin/ssh-keygen
SSHD=/usr/sbin/sshd
# Begin cluster-ssh modifications
if [ -z "$OCF_RESKEY_service_name" ]; then
	#
	# Normal / system-wide ssh configuration
	#
	RSA1_KEY=/etc/ssh/ssh_host_key
	RSA_KEY=/etc/ssh/ssh_host_rsa_key
	DSA_KEY=/etc/ssh/ssh_host_dsa_key
	PID_FILE=/var/run/sshd.pid
else
	#
	# Per-service ssh configuration
	#
	RSA1_KEY=/etc/cluster/ssh/$OCF_RESKEY_service_name/ssh_host_key
	RSA_KEY=/etc/cluster/ssh/$OCF_RESKEY_service_name/ssh_host_rsa_key
	DSA_KEY=/etc/cluster/ssh/$OCF_RESKEY_service_name/ssh_host_dsa_key
	PID_FILE=/var/run/sshd-$OCF_RESKEY_service_name.pid
	CONFIG_FILE="/etc/cluster/ssh/$OCF_RESKEY_service_name/sshd_config"
	[ -n "$CONFIG_FILE" ] && OPTIONS="$OPTIONS -f $CONFIG_FILE"
	prog="$prog ($OCF_RESKEY_service_name)"
fi
[ -n "$PID_FILE" ] && OPTIONS="$OPTIONS -o PidFile=$PID_FILE"
# End cluster-ssh modifications


runlevel=$(set -- $(runlevel); eval "echo \$$#" )

do_rsa1_keygen() {
	if [ ! -s $RSA1_KEY ]; then
		echo -n $"Generating SSH1 RSA host key: "
		if $KEYGEN -q -t rsa1 -f $RSA1_KEY -C '' -N '' >&/dev/null; then
			chmod 600 $RSA1_KEY
			chmod 644 $RSA1_KEY.pub
			if [ -x /sbin/restorecon ]; then
			    /sbin/restorecon $RSA1_KEY.pub
			fi
			success $"RSA1 key generation"
			echo
		else
			failure $"RSA1 key generation"
			echo
			exit 1
		fi
	fi
}

do_rsa_keygen() {
	if [ ! -s $RSA_KEY ]; then
		echo -n $"Generating SSH2 RSA host key: "
		if $KEYGEN -q -t rsa -f $RSA_KEY -C '' -N '' >&/dev/null; then
			chmod 600 $RSA_KEY
			chmod 644 $RSA_KEY.pub
			if [ -x /sbin/restorecon ]; then
			    /sbin/restorecon $RSA_KEY.pub
			fi
			success $"RSA key generation"
			echo
		else
			failure $"RSA key generation"
			echo
			exit 1
		fi
	fi
}

do_dsa_keygen() {
	if [ ! -s $DSA_KEY ]; then
		echo -n $"Generating SSH2 DSA host key: "
		if $KEYGEN -q -t dsa -f $DSA_KEY -C '' -N '' >&/dev/null; then
			chmod 600 $DSA_KEY
			chmod 644 $DSA_KEY.pub
			if [ -x /sbin/restorecon ]; then
			    /sbin/restorecon $DSA_KEY.pub
			fi
			success $"DSA key generation"
			echo
		else
			failure $"DSA key generation"
			echo
			exit 1
		fi
	fi
}

do_restart_sanity_check()
{
	$SSHD -t
	RETVAL=$?
	if [ ! "$RETVAL" = 0 ]; then
		failure $"Configuration file or keys are invalid"
		echo
	fi
}

start()
{
	# Create keys if necessary
	do_rsa1_keygen
	do_rsa_keygen
	do_dsa_keygen
	
	cp -af /etc/localtime /var/empty/sshd/etc

	echo -n $"Starting $prog: "
	$SSHD $OPTIONS && success || failure
	RETVAL=$?
	[ "$RETVAL" = 0 ] && touch /var/lock/subsys/sshd
	echo
}

stop()
{
	echo -n $"Stopping $prog: "
	# If we have a PID file, use it instead so we don't kill the wrong
	# instance of sshd.  (Cluster)
	if [ -n "$PID_FILE" ]; then
	    killproc -p $PID_FILE
	elif [ -n "`pidfileofproc $SSHD`" ] ; then
	    killproc $SSHD
	else
	    failure $"Stopping $prog"
	fi
	RETVAL=$?
	# if we are in halt or reboot runlevel kill all running sessions
	# so the TCP connections are closed cleanly
	if [ "x$runlevel" = x0 -o "x$runlevel" = x6 ] ; then
	    killall $prog 2>/dev/null
	fi
	[ "$RETVAL" = 0 ] && rm -f /var/lock/subsys/sshd
	echo
}

reload()
{
	echo -n $"Reloading $prog: "
	# If we have a PID file, use it instead so we don't kill the wrong
	# instance of sshd.  (Cluster)
	if [ -n "$PID_FILE" ]; then
	    killproc -p $PID_FILE -HUP
	elif [ -n "`pidfileofproc $SSHD`" ] ; then
	    killproc $SSHD -HUP
	else
	    failure $"Reloading $prog"
	fi
	RETVAL=$?
	echo
}

case "$1" in
	start)
		start
		;;
	stop)
		stop
		;;
	restart)
		stop
		start
		;;
	reload)
		reload
		;;
	condrestart)
		if [ -f /var/lock/subsys/sshd ] ; then
			do_restart_sanity_check
			if [ "$RETVAL" = 0 ] ; then
				stop
				# avoid race
				sleep 3
				start
			fi
		fi
		;;
	status)
		status $SSHD
		RETVAL=$?
		;;
	*)
		echo $"Usage: $0 {start|stop|restart|reload|condrestart|status}"
		RETVAL=1
esac
exit $RETVAL