petrenkorf/php-ssh

An experimental object oriented SSH api in PHP

PHP SSH

(master)

Provides an object-oriented wrapper for the php ssh2 extension.

Requirements

You need PHP version 5.3+ with the SSH2 extension.

Installation

The best way to add the library to your project is using composer.

$ composer require herzult/php-ssh:~1.0

Usage

Configuration of the connection

To establish an SSH connection, you must first define its configuration. For that, create a Configuration instance with all the needed parameters.

<?php

// simple configuration to connect "my-host"
$configuration = new Ssh\Configuration('my-host');

The available configuration classes are:

• Configuration
• SshConfigFileConfiguration

Both connection configuration and public/private key authentication can be obtained from a ssh config file such as ~/.ssh/config

<?php

// simple configuration to connect "my-host"
$configuration = new Ssh\SshConfigFileConfiguration('/Users/username/.ssh/config', 'my-host');
$authentication = $configuration->getAuthentication('optional_passphrase', 'optional_username');

Create a session

The session is the central access point to the SSH functionality provided by the library.

<?php

// ... the configuration creation

$session = new Ssh\Session($configuration);

Authentication

The authentication classes allow you to authenticate over a SSH session. When you define an authentication for a session, it will authenticate on connection.

<?php

$configuration = new Ssh\Configuration('myhost');
$authentication = new Ssh\Authentication\Password('John', 's3cr3t');

$session = new Session($configuration, $authentication);

The available authentication are:

• None for username based authentication
• Password for password authentication
• PublicKeyFile to authenticate using a public key
• HostBasedFile to authenticate using a public hostkey
• Agent to authenticate using an ssh-agent

Authentication from SshConfigFileConfiguration

If you use an ssh config file you can load your authentication and configuration from it as follows:

<?php

$configuration = new Ssh\SshConfigFileConfiguration('~/.ssh/config', 'my-host');

$session = new Session($configuration, $configuration->getAuthentication());

This will pick up your public and private keys from your config file Host and Identity declarations.

Subsystems

Once you are authenticated over a SSH session, you can use the subsystems.

Sftp

You can easily access the sftp subsystem of a session using the getSftp() method:

<?php

// the session creation

$sftp = $session->getSftp();

See the Ssh\Sftp class for more details on the available methods.

Publickey

The session also provides the getPublickey() method to access the publickey subsystem:

<?php

// ... the session creation

$publickey = $session->getPublickey();

See the Ssh\Publickey class for more details on the available methods.

Exec

The session provides the getExec() method to access the exec subsystem

<?php

// ... the session creation

$exec = $session->getExec();

echo $exec->run('ls -lah');

See the Ssh\Exec class for more details.