Dart Requires Chilkat v11.0.0+

Export Digital Certificate's Public Key

See more Certificates Examples

The ExportPublicKey method can be called to get a certificate's public key. It can then be saved to any of a number of formats: (1) OpenSSL DER, (2) OpenSSL PEM, (3) RSA DER, (4) XML. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  final cert = CkCert();

  // LoadFromFile will load virtually any certificate format file.
  // It will auto-recognize the format and load appropiately.
  try {
    cert.loadFromFile('/Users/chilkat/testData/cer/chilkat.cer');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Get the public key:
  final pubkey = CkPublicKey();
  cert.getPublicKey(pubkey);

  // Save to various formats:
  try {
    pubkey.saveDerFile(false, '/Users/chilkat/testData/pubkeys/chilkat_pkcs8.der');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  try {
    pubkey.savePemFile(false, '/Users/chilkat/testData/pubkeys/chilkat.pem');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  try {
    pubkey.saveDerFile(true, '/Users/chilkat/testData/pubkeys/chilkat_pkcs1.der');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  try {
    pubkey.saveXmlFile('/Users/chilkat/testData/pubkeys/chilkat.xml');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Public key exported to all file formats.');
}