Dart

Load an Encrypted Private Key from a PEM File

Demonstrates the Chilkat PrivateKey.LoadEncryptedPemFile method, which loads a private key from a file, using a password when the key is encrypted. The first argument is the file path and the second is the password.

Note: The file path is relative to the application's current working directory. Absolute paths may also be used. Supply the path to your own key file.

Background: The file-based encrypted loader — the natural choice for a .pem key stored with a passphrase, as most deployment keys are. It decrypts encrypted PKCS #8 PEM and also accepts unencrypted files, so it works whether or not the specific file is protected. Supply the passphrase from a secure source.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the PrivateKey.LoadEncryptedPemFile method, which loads a private key from a file,
  // using a password when the key is encrypted.  The 1st argument is the file path and the 2nd is
  // the password.

  final privKey = CkPrivateKey();

  // The key password is not hard-coded in a real application; obtain it from an interactive
  // prompt, environment variable, or a secrets vault.
  final password = 'myKeyPassword';

  try {
    privKey.loadEncryptedPemFile('qa_data/private_encrypted.pem', password);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Loaded a ${privKey.keyType} private key.');
}