Dart

Load an Encrypted Private Key from PEM Text

Demonstrates the Chilkat PrivateKey.LoadEncryptedPem method, which loads a private key from PEM text, using a password when the PEM is encrypted. The first argument is the PEM string and the second is the password. Unencrypted PEM is also accepted.

Background: An encrypted PEM protects the key material at rest — a stolen file is useless without the passphrase — which is why encrypted keys are preferred for anything shipped or stored. This loader supplies that passphrase to decrypt a BEGIN ENCRYPTED PRIVATE KEY block (and gracefully handles unencrypted PEM too), so it is a safe default when a PEM might be either. The password should come from a secure source, never a hard-coded literal.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the PrivateKey.LoadEncryptedPem method, which loads a private key from PEM text.
  // The 1st argument is the PEM string and the 2nd is the password (used when the PEM is
  // encrypted).  Unencrypted PEM is also accepted.

  final privKey = CkPrivateKey();

  // The PEM text of an encrypted private key.
  final pemText = '-----BEGIN ENCRYPTED PRIVATE KEY-----\nMIIFHzBJ...\n-----END ENCRYPTED PRIVATE KEY-----';

  // 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.loadEncryptedPem(pemText, password);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

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