(PHP Extension) SFTP Public-Key Authentication

Demonstrates how to authenticate with an SSH/SFTP server using publickey authentication.

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

$sftp = new CkSFtp();

// Set some timeouts, in milliseconds:
$sftp->put_ConnectTimeoutMs(5000);
$sftp->put_IdleTimeoutMs(15000);

// Connect to the SSH server.  
// The standard SSH port = 22
// The hostname may be a hostname or IP address.
$hostname = 'sftp.example.com';
$port = 22;
$success = $sftp->Connect($hostname,$port);
if ($success != true) {
    print $sftp->lastErrorText() . "\n";
    exit;
}

$key = new CkSshKey();

// Load a PEM file into a string variable:
// (This does not load the PEM file into the key.  The LoadText
// method is a convenience method for loading the full contents of ANY text
// file into a string variable.)
$privKey = $key->loadText('myPrivateKey.pem');
if ($key->get_LastMethodSuccess() != true) {
    print $key->lastErrorText() . "\n";
    exit;
}

// Load a private key from a PEM string:
// (Private keys may be loaded from OpenSSH and Putty formats.
// Both encrypted and unencrypted private key file formats
// are supported.  This example loads an unencrypted private
// key in OpenSSH format.
$success = $key->FromOpenSshPrivateKey($privKey);
if ($success != true) {
    print $key->lastErrorText() . "\n";
    exit;
}

// Authenticate with the SSH server.  Chilkat SFTP supports
// both password-based authenication as well as public-key
// authentication.  
$success = $sftp->AuthenticatePk('myLogin',$key);
if ($success != true) {
    print $sftp->lastErrorText() . "\n";
    exit;
}

print $sftp->lastErrorText() . "\n";
print 'Public-Key Authentication Successful!' . "\n";

?>