Dart

Save a Public Key as an XML File

Demonstrates the Chilkat PublicKey.SaveXmlFile method, which saves the public key as Chilkat XML (the same text as GetXml) to a file. 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 GetXml, for interoperating with .NET or XML-signature software that reads XML key values. As a public key it is not sensitive, so the resulting file can be shared. No byte-order mark or extra line-ending changes are added.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Load a public key to export.  LoadFromFile inspects the content, so it accepts DER, PEM, XML,
  // JWK, and other supported representations.
  final pubKey = CkPublicKey();
  try {
    pubKey.loadFromFile('qa_data/public.pem');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Save the public key as Chilkat XML (the same text as GetXml).
  try {
    pubKey.saveXmlFile('qa_output/public_key.xml');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Saved.');
}