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(PHP ActiveX) SSH Authenticate using Smart Card Private Key

See more SSH Examples

Demonstrates how to use a private key stored on an HSM (smartcard or token) for SSH public-key authentication. (Public-key authentication means the client, which is your application, uses the private key, while the corresponding public key is installed on the server under your SSH account.)

Note: This example requires Chilkat v9.5.0.96 or later.

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

// Note: Chilkat's PKCS11 implementation runs on Windows, Linux, Mac OS X, and other supported operating systems.

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Pkcs11')
$pkcs11 = new COM("Chilkat.Pkcs11");

// Use the PKCS11 driver (.dll, .so, .dylib) for your particular HSM.
// For example:
$pkcs11->SharedLibPath = 'C:/Program Files (x86)/Gemalto/IDGo 800 PKCS#11/IDPrimePKCS11.dll';

// Use your HSM's PIN.
$pin = '0000';

// Normal user = 1
$userType = 1;

// Establish a logged-on user session with the HSM.
$success = $pkcs11->QuickSession($userType,$pin);
if ($success == 0) {
    print $pkcs11->LastErrorText . "\n";
    exit;
}

// Provide a template to find a PKCS11 object.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject')
$jsonTemplate = new COM("Chilkat.JsonObject");

// Find an RSA private key with the label "MySshKey".
// Here's an example of how the key was originally imported: 
// PKCS11 Import SSH Key
$jsonTemplate->UpdateString('class','private_key');
$jsonTemplate->UpdateString('key_type','rsa');
$jsonTemplate->UpdateString('label','MySshKey');

$privKeyHandle = $pkcs11->FindObject($jsonTemplate);
if ($privKeyHandle == 0) {
    print $pkcs11->LastErrorText . "\n";
    exit;
}

// The private key handle is only valid during the PKCS11 session.
// If you wish to use the private key in another PKCS11 session,
// you'll first need to find it.  See:  
print 'private key handle: ' . $privKeyHandle . "\n";

// We'll also need the PKCS11 public key handle
// Modify the template by updating the "class" to "public_key"
$jsonTemplate->UpdateString('class','public_key');

$pubKeyHandle = $pkcs11->FindObject($jsonTemplate);
if ($pubKeyHandle == 0) {
    print $pkcs11->LastErrorText . "\n";
    exit;
}

print 'public key handle: ' . $pubKeyHandle . "\n";

// Create an empty SSH key object, and tell it to use the PKCS11 handles.
// We also need to indicate the key type.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.SshKey')
$sshKey = new COM("Chilkat.SshKey");
$success = $sshKey->UsePkcs11($pkcs11,$privKeyHandle,$pubKeyHandle,'rsa');
if ($success == 0) {
    print $sshKey->LastErrorText . "\n";
    exit;
}

// Create an SSH object and authenticate using the SSH key, which will utilize the existing PKCS11 session.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Ssh')
$ssh = new COM("Chilkat.Ssh");

$success = $ssh->Connect('my-ssh-server.com',22);
if ($success == 0) {
    print $ssh->LastErrorText . "\n";
    exit;
}

// This is where the PKCS11 private key on the smart card is used.
$success = $ssh->AuthenticatePk('your_ssh_username',$sshKey);
if ($success == 0) {
    print $ssh->LastErrorText . "\n";
    exit;
}

// Do whatever it is your app needs to do using the authenticated SSH session....
// ...
// ...

$ssh->Disconnect();

$pkcs11->Logout();
$pkcs11->CloseSession();

?>

 

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