php无阻塞SSH客户端实例_PHP教程

<?php
class FSSH{
private $conn;
private $shell;

/**
* key=String 密码认证,key=array('pub'=>,'pri'=>,'type'=>,'phrase'=>)密钥认证
* 密钥认证type分为两种：ssh-rsa,ssh-dss
* $host[addr]=String 地址,$host['fp']=array() 服务器指纹
*/
function __construct($host,$user,$key){
if(empty($host['addr'])){
debug_print('Host cant't be empty',E_USER_ERROR);
}
if(empty($host['fp'])){
debug_print('finger print is not specified',E_USER_ERROR);
}
$this->stdin=fopen('php://stdin','r');
$this->stdout=fopen('php://stdout','w');
if(false!==strpos($host['addr'],':')){
$temp=explode(':',$host['addr']);
$host['addr']=$temp[0];
$port=$temp[1];
}else{
$port=22;
}
if(is_string($key) || empty($key['type'])){
$methods=null;
}else{
$methods=array('hostkey'=>$key['type']);
}
$conn=ssh2_connect($host['addr'],$port,$methods,array('disconnect'=>array($this,'disconnect')));
$fp=ssh2_fingerprint($conn,SSH2_FINGERPRINT_MD5);
$success=false;
$fpOK=false;
if(in_array($fp,$host['fp'])){
$fpOK=true;
}else{
fwrite($this->stdout,"$fpnIs fingerprint OK ?(y/n)");
$input=strtolower(stream_get_line($this->stdin,1));
if($input=='y'){
$fpOK=true;
}else{
$fpOK=false;
}
}
if($fpOK){
if(is_array($key)){
if (ssh2_auth_pubkey_file($conn,$user,$key['pub'],$key['pri'],$key['phrase'])){
$success=true;
}else{
debug_print('Public Key Authentication Failed',E_USER_ERROR);
}
}elseif(is_string($key)){
if(ssh2_auth_password($conn,$user,$key)){
$success=true;
}else{
debug_print('Password Authentication Failed',E_USER_ERROR);
}
}
}else{
debug_print('Fingerprint is invalid',E_USER_ERROR);
}
if($success){
$this->conn=$conn;
$this->shell=ssh2_shell($conn,null,null,1024);
}
return $success;
}

function shell(){
//最后一条命令
$last='';
//先结束shell，再结束while
$signalTerminate=false;
while(true){
$cmd=$this->fread($this->stdin);
$out=stream_get_contents($this->shell,1024);
if(!empty($out) and !empty($last)){
$l1=strlen($out);
$l2=strlen($last);
$l=$l1>$l2?$l2:$l1;
$last=substr($last,$l);
$out=substr($out,$l);
}
echo ltrim($out);
if($signalTerminate){
break;
}
if(in_array(trim($cmd),array('exit'))){
$signalTerminate=true;
}
if(!empty($cmd)){
$last=$cmd;
fwrite($this->shell,$cmd);
}
}
}

//解决windows命令行的读取问题，没有别的办法了。
private function fread($fd){
static $data='';
$read = array($fd);
$write = array();
$except = array();
$result = stream_select($read,$write,$except,0,1000);
if($result === false)
debug_print('stream_select failed',E_USER_ERROR);
if($result !== 0){
$c= stream_get_line($fd,1);
if($c!=chr(13))
$data.=$c;
if($c==chr(10)){
$t=$data;
$data='';
return $t;
}
}
}

function __destruct(){
fclose($this->stdin);
fclose($this->stdout);
$this->disconnect();
}

private function disconnect(){
if(is_resource($this->conn)){
unset($this->conn);
fclose($this->shell);
}
}
}

//$ssh=new FSSH(array('addr'=>'x.x.x.x:22','fp'=>array('')),'tunnel',array('pub'=>'E:Identity.pub','pri'=>'E:Identity','type'=>'ssh-rsa'));
$ssh=new FSSH(array('addr'=>'192.168.2.205','fp'=>array('54ECC700B844DCF0D40554A56C57C01E')),'root','123456');
$ssh->shell();