Dart

Import an SSH Key to an HSM using PKCS11

See more PKCS11 Examples

Demonstrates how to import an SSH private key to an HSM (smartcard or token).

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

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // 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.

  final pkcs11 = CkPkcs11();

  // 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.
  final pin = '0000';

  // Normal user = 1
  final userType = 1;

  // Establish a logged-on user session with the HSM.
  try {
    pkcs11.quickSession(userType, pin);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Create a PKCS11 template for importing the SSH key.
  final jsonTemplate = CkJsonObject();

  // Indicate the key is to be stored on the token (i.e. it is not a session-only key)
  jsonTemplate.updateBool('token', true);
  // The key should have the ability to sign
  jsonTemplate.updateBool('sign', true);

  // Let's provide a few attributes to help us find the this key at a later time.
  // See SSH Public-Key Authentication using an HSM

  // The ID is byte data, so it should be base64 or hex.
  // Specify "id" if passing base64 data, "id_hex" for hexidecimal, or "id_ascii" for directly copying the ascii bytes of the string.
  // You can provide any ID of your choice.  It is optional.
  jsonTemplate.updateString('id_hex', '0A0B0C0D01020304');

  // Optionally specify a label.
  jsonTemplate.updateString('label', 'MySshKey');

  // Load the SSH key to be imported to the HSM (smartcard or token)
  final sshKey = CkSshKey();
  sshKey.password = 'password_of_the_encrypted_ppk_file';
  final ppkContents = sshKey.loadText('c:/my_ssh_keys/someSshKey.ppk');
  try {
    sshKey.fromPuttyPrivateKey(ppkContents);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Import the SSH private key onto the HSM.
  // The PKCS11 handle to the imported private key is returned.
  // A 0 is returned on failure.
  final privKeyHandle = pkcs11.importSshKey(sshKey, jsonTemplate);
  if (privKeyHandle == 0) {
    print(pkcs11.lastErrorText);
    return;
  }

  // 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  SSH Public-Key Authentication using a Smartcard
  print('private key handle: $privKeyHandle');

  print('Successfully imported the SSH key onto the HSM.');

  pkcs11.logout();
  pkcs11.closeSession();
}