Dart

Save a Private Key as a Traditional PEM File

Demonstrates the Chilkat PrivateKey.SavePemFile method, which saves the key as unencrypted PEM, preferring a traditional algorithm-specific representation (for example RSA PRIVATE KEY). The only argument is the destination path.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: The file-writing form of GetPkcs1Pem, producing the legacy per-algorithm PEM that some older software requires. Prefer SavePkcs8PemFile for modern interoperability; use this when a consumer specifically needs the traditional layout. The PEM is unencrypted.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Load a private key to export.
  final privKey = CkPrivateKey();
  try {
    privKey.loadPemFile('qa_data/private.pem');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Save as unencrypted PEM, preferring the traditional algorithm-specific representation (for
  // example "RSA PRIVATE KEY" for RSA).
  try {
    privKey.savePemFile('qa_output/private.pem');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Saved.');
}