SSH Public Key Authentication

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

Download Chilkat 32-bit SSH / SFTP ActiveX (.msi)

Download All 32-bit Chilkat ActiveX Components (.zip)

Download All 64-bit Chilkat ActiveX Components (.zip)

<?php

//  Important: It is helpful to send the contents of the
//  sftp.LastErrorText property when sending email
//  to support@chilkatsoft.com

$ssh = new COM("Chilkat.Ssh");

//  Any string automatically begins a fully-functional 30-day trial.
$success = $ssh->UnlockComponent('Anything for 30-day trial');
if ($success != true) {
    print $ssh->lastErrorText() . "\n";
    exit;
}

//  Set some timeouts, in milliseconds:
$ssh->ConnectTimeoutMs = 5000;
$ssh->IdleTimeoutMs = 15000;

//  Connect to the SSH server.
//  The standard SSH port = 22
//  The hostname may be a hostname or IP address.

$hostname = 'www.my-ssh-server.com';
$port = 22;
$success = $ssh->Connect($hostname,$port);
if ($success != true) {
    print $ssh->lastErrorText() . "\n";
    exit;
}

$key = new COM("Chilkat.SshKey");

//  Load a private key from a PEM file:
//  (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.
$privKey = $key->loadText('myPrivateKey.pem');
if (is_null($privKey)) {
    print $key->lastErrorText() . "\n";
    exit;
}

//  (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";
?>