PHP Extension

SSH Public Key Authentication

See more SSH Examples

Demonstrates how to authenticate with an SSH server using public key authentication. PHP Extension

<?php

include("chilkat.php");

$success = false;

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

$ssh = new CkSsh();

// Set some timeouts, in milliseconds:
$ssh->put_ConnectTimeoutMs(5000);
$ssh->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 = $ssh->Connect($hostname,$port);
if ($success != true) {
    print $ssh->lastErrorText() . "\n";
    exit;
}

$key = new CkSshKey();

// Read the 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.  PuTTY keys typically use the .ppk
// file extension, while OpenSSH keys use the PEM format.
// (For PuTTY keys, call FromPuttyPrivateKey instead.)
$success = $key->FromOpenSshPrivateKey($privKey);
if ($success != true) {
    print $key->lastErrorText() . "\n";
    exit;
}

// Authenticate with the SSH server using the login and
// private key.  (The corresponding public key should've 
// been installed on the SSH server beforehand.)
$success = $ssh->AuthenticatePk('myLogin',$key);
if ($success != true) {
    print $ssh->lastErrorText() . "\n";
    exit;
}

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

?>