Load an Encrypted PKCS #8 Private Key File

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Demonstrates the Chilkat PrivateKey.LoadPkcs8EncryptedFile 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. It handles encrypted PKCS #8 DER or PEM, and unencrypted forms.

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.

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the PrivateKey.LoadPkcs8EncryptedFile 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.  It handles encrypted PKCS #8 DER or PEM, as well as unencrypted forms.

  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.loadPkcs8EncryptedFile('qa_data/private_pkcs8_enc.der', password);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

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