PHP를 통해 SSH 명령을 실행하는 방법

PHP를 통해 SSH 명령을 실행하는 방법

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PHP를 통해 SSH를 찾고 있습니다. 이에 대해 가장 안전한 방법은 무엇입니까? 나는 내가 할 수 있다는 것을 안다.

shell_exec("SSH user@host.com mkdir /testing");

더 나은 것이 있습니까? 너무 '웃긴'느낌 :).

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순수한 PHP SSH 구현 인 phpseclib를 사용 합니다 . 예 :

<?php
include('Net/SSH2.php');

$ssh = new Net_SSH2('www.domain.tld');
if (!$ssh->login('username', 'password')) {
    exit('Login Failed');
}

echo $ssh->exec('pwd');
echo $ssh->exec('ls -la');
?>

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SSH2 확장을 사용할 수 있습니까?

문서 : http://www.php.net/manual/en/function.ssh2-exec.php

$connection = ssh2_connect('shell.example.com', 22);
ssh2_auth_password($connection, 'username', 'password');

$stream = ssh2_exec($connection, '/usr/local/bin/php -i');

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출력 스트림이 때때로 작동하고 때로는 작동하지 않기 때문에 PHP에서 ssh2로 어려움을 겪었습니다. 여기에 내 라이브러리를 붙여 넣을 것입니다. 코드에 약간의 불일치가있는 경우 프레임 워크에 연결했기 때문이지만 포팅을 잘해야합니다.

<?php

class Components_Ssh {

    private $host;

    private $user;

    private $pass;

    private $port;

    private $conn = false;

    private $error;

    private $stream;

    private $stream_timeout = 100;

    private $log;

    private $lastLog;

    public function __construct ( $host, $user, $pass, $port, $serverLog ) {
        $this->host = $host;
        $this->user = $user;
        $this->pass = $pass;
        $this->port = $port;
        $this->sLog = $serverLog;

        if ( $this->connect ()->authenticate () ) {
            return true;
        }
    }

    public function isConnected () {
        return ( boolean ) $this->conn;
    }

    public function __get ( $name ) {
        return $this->$name;
    }

    public function connect () {
        $this->logAction ( "Connecting to {$this->host}" );
        if ( $this->conn = ssh2_connect ( $this->host, $this->port ) ) {
            return $this;
        }
        $this->logAction ( "Connection to {$this->host} failed" );
        throw new Exception ( "Unable to connect to {$this->host}" );
    }

    public function authenticate () {
        $this->logAction ( "Authenticating to {$this->host}" );
        if ( ssh2_auth_password ( $this->conn, $this->user, $this->pass ) ) {
            return $this;
        }
        $this->logAction ( "Authentication to {$this->host} failed" );
        throw new Exception ( "Unable to authenticate to {$this->host}" );
    }

    public function sendFile ( $localFile, $remoteFile, $permision = 0644 ) {
        if ( ! is_file ( $localFile ) ) throw new Exception ( "Local file {$localFile} does not exist" );
        $this->logAction ( "Sending file $localFile as $remoteFile" );

        $sftp = ssh2_sftp ( $this->conn );
        $sftpStream = @fopen ( 'ssh2.sftp://' . $sftp . $remoteFile, 'w' );
        if ( ! $sftpStream ) {
            //  if 1 method failes try the other one
            if ( ! @ssh2_scp_send ( $this->conn, $localFile, $remoteFile, $permision ) ) {
                throw new Exception ( "Could not open remote file: $remoteFile" );
            }
            else {
                return true;
            }
        }

        $data_to_send = @file_get_contents ( $localFile );

        if ( @fwrite ( $sftpStream, $data_to_send ) === false ) {
            throw new Exception ( "Could not send data from file: $localFile." );
        }

        fclose ( $sftpStream );

        $this->logAction ( "Sending file $localFile as $remoteFile succeeded" );
        return true;
    }

    public function getFile ( $remoteFile, $localFile ) {
        $this->logAction ( "Receiving file $remoteFile as $localFile" );
        if ( ssh2_scp_recv ( $this->conn, $remoteFile, $localFile ) ) {
            return true;
        }
        $this->logAction ( "Receiving file $remoteFile as $localFile failed" );
        throw new Exception ( "Unable to get file to {$remoteFile}" );
    }

    public function cmd ( $cmd, $returnOutput = false ) {
        $this->logAction ( "Executing command $cmd" );
        $this->stream = ssh2_exec ( $this->conn, $cmd );

        if ( FALSE === $this->stream ) {
            $this->logAction ( "Unable to execute command $cmd" );
            throw new Exception ( "Unable to execute command '$cmd'" );
        }
        $this->logAction ( "$cmd was executed" );

        stream_set_blocking ( $this->stream, true );
        stream_set_timeout ( $this->stream, $this->stream_timeout );
        $this->lastLog = stream_get_contents ( $this->stream );

        $this->logAction ( "$cmd output: {$this->lastLog}" );
        fclose ( $this->stream );
        $this->log .= $this->lastLog . "\n";
        return ( $returnOutput ) ? $this->lastLog : $this;
    }

    public function shellCmd ( $cmds = array () ) {
        $this->logAction ( "Openning ssh2 shell" );
        $this->shellStream = ssh2_shell ( $this->conn );

        sleep ( 1 );
        $out = '';
        while ( $line = fgets ( $this->shellStream ) ) {
            $out .= $line;
        }

        $this->logAction ( "ssh2 shell output: $out" );

        foreach ( $cmds as $cmd ) {
            $out = '';
            $this->logAction ( "Writing ssh2 shell command: $cmd" );
            fwrite ( $this->shellStream, "$cmd" . PHP_EOL );
            sleep ( 1 );
            while ( $line = fgets ( $this->shellStream ) ) {
                $out .= $line;
                sleep ( 1 );
            }
            $this->logAction ( "ssh2 shell command $cmd output: $out" );
        }

        $this->logAction ( "Closing shell stream" );
        fclose ( $this->shellStream );
    }

    public function getLastOutput () {
        return $this->lastLog;
    }

    public function getOutput () {
        return $this->log;
    }

    public function disconnect () {
        $this->logAction ( "Disconnecting from {$this->host}" );
        // if disconnect function is available call it..
        if ( function_exists ( 'ssh2_disconnect' ) ) {
            ssh2_disconnect ( $this->conn );
        }
        else { // if no disconnect func is available, close conn, unset var
            @fclose ( $this->conn );
            $this->conn = false;
        }
        // return null always
        return NULL;
    }

    public function fileExists ( $path ) {
        $output = $this->cmd ( "[ -f $path ] && echo 1 || echo 0", true );
        return ( bool ) trim ( $output );
    }
}

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For those using the Symfony framework, the phpseclib can also be used to connect via SSH. It can be installed using composer:

composer require phpseclib/phpseclib

Next, simply use it as follows:

use phpseclib\Net\SSH2;

// Within a controller for example:
$ssh = new SSH2('hostname or ip');
if (!$ssh->login('username', 'password')) {
    // Login failed, do something
}

$return_value = $ssh->exec('command');

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Use the ssh2 functions. Anything you'd do via an exec() call can be done directly using these functions, saving you a lot of connections and shell invocations.

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//Update 2018, works//

Method1:

Download phpseclib v1 and use this code:

<?php
set_include_path(__DIR__ . '/phpseclib1.0.11');
include("Net/SSH2.php");

$key ="MyPassword";
  /* ### if using PrivateKey ### 
  include("Crypt/RSA.php");
  $key = new Crypt_RSA();
  $key->loadKey(file_get_contents('private-key.ppk'));
  */

$ssh = new Net_SSH2('www.example.com', 22);   // Domain or IP
if (!$ssh->login('your_username', $key))  exit('Login Failed');

echo $ssh->exec('pwd');
?>

or Method2:

Download newest phpseclib v2 (requires composer install at first):

<?php

set_include_path($path=__DIR__ . '/phpseclib-master/phpseclib');
include ($path.'/../vendor/autoload.php');

$loader = new \Composer\Autoload\ClassLoader();

use phpseclib\Net\SSH2;

$key ="MyPassword";
  /* ### if using PrivateKey ### 
  use phpseclib\Crypt\RSA;
  $key = new RSA();
  $key->load(file_get_contents('private-key.ppk'));
  */

$ssh = new SSH2('www.example.com', 22);   // Domain or IP
if (!$ssh->login('your_username', $key))   exit('Login Failed'); 

echo $ssh->exec('pwd');
?>

p.s. if you get "Connection timed out" then it's probably the issue of HOST/FIREWALL (local or remote) or like that, not a fault of script.

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I wrote a simple ssh client with xterm, you can take a look to the source code on the github page https://github.com/roke22/PHP-SSH2-Web-Client

You can help me to improve, please send me some feedback.

참고URL : https://stackoverflow.com/questions/6270419/how-to-execute-ssh-commands-via-php