(PHP ActiveX) SSH Authentication using X.509 Certificates

See more SSH Examples

Demonstrates how to authenticate with an SSH/SFTP server using an certificate's private key.

Note: See X.509v3 Certificates for SSH Authentication for more information.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

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

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Ssh')
$ssh = new COM("Chilkat.Ssh");

$hostname = 'ssh.example.com';
$port = 22;
$success = $ssh->Connect($hostname,$port);
if ($success != 1) {
    print $ssh->LastErrorText . "\n";
    exit;
}

// Load the cert + private key from a .pfx.
// Note: Chilkat provides methods for loading certs and private keys from many sources, including smart cards and USB tokens (HSM's)
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Cert')
$cert = new COM("Chilkat.Cert");
$success = $cert->LoadPfxFile('qa_data/pfx/example.pfx','pfx_password');
if ($success != 1) {
    print $cert->LastErrorText . "\n";
    exit;
}

// Get the cert's private key (as PEM) to be used for SSH authentication.
// (The public key is installed on the server.)
$privKeyPem = $cert->getPrivateKeyPem();
if ($cert->LastMethodSuccess == 0) {
    print $cert->LastErrorText . "\n";
    exit;
}

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.SshKey')
$key = new COM("Chilkat.SshKey");

// Load a private key from a PEM string:
$success = $key->FromOpenSshPrivateKey($privKeyPem);
if ($success != 1) {
    print $key->LastErrorText . "\n";
    exit;
}

// Authenticate with the SSH server.
$success = $ssh->AuthenticatePk('myLogin',$key);
if ($success != 1) {
    print $ssh->LastErrorText . "\n";
    exit;
}

print 'Public-Key Authentication Successful!' . "\n";

?>