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#! /usr/local/bin/php -f
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<?php
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/*
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sshd - Modified to work on disk based system
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Copyright 2004 Scott K Ullrich
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Original Copyright (C) 2004 Fred Mol <fredmol@xs4all.nl>.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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require_once("config.inc");
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if(isset($config['system']['enablesshd'])) {
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/* do nothing, we're enabled */
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} else {
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if($g['booting'])
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echo "SSHD is disabled.";
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exit;
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}
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function file_size($file) {
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$size = filesize($file);
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return $size;
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}
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/* if any of these files are 0 bytes then they are corrupted.
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* remove them
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*/
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$files_to_check = array('ssh_host_dsa_key','ssh_host_dsa_key.pub','ssh_host_key','ssh_host_key.pub','ssh_host_rsa_key','ssh_host_rsa_key.pub','/root/.authorized_keys');
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foreach($files_to_check as $f2c) {
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if(file_exists("/etc/ssh/{$f2c}"))
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if(file_size("/etc/ssh/{$f2c}")==0) {
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mwexec("rm /etc/ssh/ssh_host*");
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}
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}
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if (!is_dir("/var/empty")) {
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/* make ssh home directory */
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mkdir("/var/empty", 0555);
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}
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if(!file_exists("")) {
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/* Login related files. */
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touch("/var/log/lastlog");
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}
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/* Make the root passwords are the same as the web admin password. */
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conf_mount_rw();
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$fd = popen("/usr/sbin/pw usermod -n root -H 0", "w");
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fwrite($fd, $config['system']['password']);
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pclose($fd);
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/* Make the admin passwords are the same as the web admin password. */
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$fd = popen("/usr/sbin/pw usermod -n admin -H 0", "w");
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fwrite($fd, $config['system']['password']);
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pclose($fd);
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$sshConfigDir = "/etc/ssh";
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if($config['system']['ssh']['port'] <> "") {
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$sshport = $config['system']['ssh']['port'];
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} else {
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$sshport = 22;
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}
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/* Include default configuration for pfSense */
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$sshconf = "# This file is automatically generated at startup\n";
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$sshconf .= "PermitRootLogin yes\n";
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$sshconf .= "Compression yes\n";
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$sshconf .= "ClientAliveInterval 30\n";
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$sshconf .= "UseDNS no\n";
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$sshconf .= "X11Forwarding no\n";
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$sshconf .= "# override default of no subsystems\n";
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$sshconf .= "Subsystem sftp /usr/libexec/sftp-server\n";
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/* Only allow protocol 2, because we say so */
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$sshconf .= "Protocol 2\n";
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/* Run the server on another port if we have one defined */
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$sshconf .= "Port $sshport\n";
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/* Write the new sshd config file */
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$fd = fopen("/etc/ssh/sshd_config", "w");
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fwrite($fd, $sshconf);
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pclose($fd);
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/* mop up from a badly implemented ssh keys -> cf backup */
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if($config['ssh']['dsa_key'] <> "") {
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unset($config['ssh']['dsa_key']);
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unset($config['ssh']['rsa_key']);
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unset($config['ssh']['rsa1_key']);
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unset($config['ssh']['dsa']);
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unset($config['ssh']['rsa']);
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unset($config['ssh']['rsa1']);
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unset($config['ssh']['ak']);
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write_config("Clearing SSH keys from config.xml");
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}
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/* are we already running? if so exit */
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if(file_exists("/tmp/keys_generating"))
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exit;
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if (!file_exists("$sshConfigDir/ssh_host_key") or file_exists("/etc/keys_generating")) {
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/* remove previous keys and regen later */
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conf_mount_rw();
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mwexec("rm /etc/ssh/ssh_host_*");
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touch("/etc/keys_generating");
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touch("/tmp/keys_generating");
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echo " Generating Keys:\n";
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system("/usr/bin/nice -n20 /usr/bin/ssh-keygen -t rsa1 -N '' -f $sshConfigDir/ssh_host_key");
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system("/usr/bin/nice -n20 /usr/bin/ssh-keygen -t rsa -N '' -f $sshConfigDir/ssh_host_rsa_key");
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system("/usr/bin/nice -n20 /usr/bin/ssh-keygen -t dsa -N '' -f $sshConfigDir/ssh_host_dsa_key");
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unlink("/etc/keys_generating");
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unlink("/tmp/keys_generating");
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echo "Starting SSH... ";
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}
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/* kill existing sshd process, server only, not the childs */
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$sshd_pid = exec("ps ax | egrep '/usr/sbin/[s]shd' | awk '{print $1}'");
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if($sshd_pid <> "") {
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echo "stopping ssh process $sshd_pid \n";
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mwexec("kill $sshd_pid");
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}
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/* Launch new server process */
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$status = mwexec("/usr/sbin/sshd");
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if($status <> 0) {
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file_notice("sshd_startup", "SSHD failed to start.", "SSHD Daemon", "");
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echo "error!\n";
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} else {
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echo "done.\n";
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}
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conf_mount_ro();
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exit;
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/* exit early, this needs more testing. */
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if (!file_exists("$sshConfigDir/ssh_host_key") and $config['ssh']['dsa'] == "") {
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/* generate keys */
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system("/usr/bin/nice -n20 /usr/bin/ssh-keygen -t rsa1 -N '' -f $sshConfigDir/ssh_host_key");
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system("/usr/bin/nice -n20 /usr/bin/ssh-keygen -t rsa -N '' -f $sshConfigDir/ssh_host_rsa_key");
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system("/usr/bin/nice -n20 /usr/bin/ssh-keygen -t dsa -N '' -f $sshConfigDir/ssh_host_dsa_key");
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/* save keys */
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$dsa = file_get_contents("{$sshConfigDir}/ssh_host_dsa_key");
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$rsa = file_get_contents("{$sshConfigDir}/ssh_host_rsa_key");
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$rsa1 = file_get_contents("{$sshConfigDir}/ssh_host_key");
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$config['ssh']['dsa'] = base64_encode($dsa);
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$config['ssh']['rsa'] = base64_encode($rsa);
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$config['ssh']['rsa1']= base64_encode($rsa1);
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/* save public keys */
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$dsapub = file_get_contents("{$sshConfigDir}/ssh_host_dsa_key.pub");
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$rsapub = file_get_contents("{$sshConfigDir}/ssh_host_rsa_key.pub");
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$rsa1pub = file_get_contents("{$sshConfigDir}/ssh_host_key.pub");
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$config['ssh']['dsa_key'] = base64_encode($dsapub);
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$config['ssh']['rsa_key'] = base64_encode($rsapub);
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$config['ssh']['rsa1_key']= base64_encode($rsa1pub);
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write_config("Saved SSH keys.");
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} else {
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/* restore keys */
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$rsa1 = base64_decode($config['ssh']['rsa1']);
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$rsa = base64_decode($config['ssh']['rsa']);
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$dsa = base64_decode($config['ssh']['dsa']);
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file_put_contents("{$sshConfigDir}/ssh_host_key", $rsa1);
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file_put_contents("{$sshConfigDir}/ssh_host_rsa_key", $rsa);
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file_put_contents("{$sshConfigDir}/ssh_host_dsa_key", $dsa);
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/* restore public keys */
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$rsa1_pub = base64_decode($config['ssh']['rsa1_key']);
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$rsa_pub = base64_decode($config['ssh']['rsa_key']);
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$dsa_pub = base64_decode($config['ssh']['dsa_key']);
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file_put_contents("{$sshConfigDir}/ssh_host_key.pub", $rsa1_pub);
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file_put_contents("{$sshConfigDir}/ssh_host_rsa_key.pub", $rsa_pub);
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file_put_contents("{$sshConfigDir}/ssh_host_dsa_key.pub", $dsa_pub);
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/* change keys owner to root */
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chown("{$sshConfigDir}/ssh_host_key", "root");
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chown("{$sshConfigDir}/ssh_host_rsa_key", "root");
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chown("{$sshConfigDir}/ssh_host_dsa_key", "root");
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/* change public keys owner to root */
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chown("{$sshConfigDir}/ssh_host_key.pub", "root");
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chown("{$sshConfigDir}/ssh_host_rsa_key.pub", "root");
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chown("{$sshConfigDir}/ssh_host_dsa_key.pub", "root");
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/* change mode on keys to u+rw */
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chmod("{$sshConfigDir}/ssh_host_key",0600);
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chmod("{$sshConfigDir}/ssh_host_rsa_key",0600);
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chmod("{$sshConfigDir}/ssh_host_dsa_key",0600);
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/* change mode on public keys to u+rw */
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chmod("{$sshConfigDir}/ssh_host_key.pub",0600);
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chmod("{$sshConfigDir}/ssh_host_rsa_key.pub",0600);
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chmod("{$sshConfigDir}/ssh_host_dsa_key.pub",0600);
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}
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if($config['ssh']['ak'] <> "") {
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$ak = base64_decode($config['ssh']['ak']);
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file_put_contents("/root/.authorized_keys", $ak);
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chmod("/root/.authorized_keys",0600);
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}
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/* start sshd */
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system("/usr/sbin/sshd");
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echo "done.\n";
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?>
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