Dart Requires Chilkat v11.0.0+

Export a Certificate's Private Key to Various Formats

See more Certificates Examples

Loads a digital certificate and private key from a PFX file (also known as PKCS#12) and exports the private key to various formats: (1) PKCS8 Encrypted, (2) PKCS8 Encrypted PEM, (3) PKCS8 unencrypted, (4) PKCS8 PEM unencrypted, (5) RSA DER unencrypted, (6) RSA PEM unencrypted, (7) XML. Dart

import 'package:chilkat/chilkat.dart';

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

  // Load from the PFX file
  final pfxFilename = '/Users/chilkat/testData/pfx/chilkat_ssl_pwd_is_test.pfx';
  final pfxPassword = 'test';

  // A PFX typically contains certificates in the chain of authentication.
  // The Chilkat cert object will choose the certificate w/
  // private key farthest from the root authority cert.
  // To access all the certificates in a PFX, use the 
  // Chilkat certificate store object instead.
  try {
    cert.loadPfxFile(pfxFilename, pfxPassword);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Get the private key...
  final privKey = CkPrivateKey();
  try {
    cert.getPrivateKey(privKey);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Export to various formats:

  final password = 'secret';
  var path = '';

  // PKCS8 Encrypted DER
  path = '/Users/chilkat/testData/privkeys/chilkat_pkcs8_enc.der';
  try {
    privKey.savePkcs8EncryptedFile(password, path);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // PKCS8 Encrypted PEM
  path = '/Users/chilkat/testData/privkeys/chilkat_pkcs8_enc.pem';
  try {
    privKey.savePkcs8EncryptedPemFile(password, path);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // PKCS8 Unencrypted DER
  path = '/Users/chilkat/testData/privkeys/chilkat_pkcs8.der';
  try {
    privKey.savePkcs8File(path);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // PKCS8 Unencrypted PEM
  path = '/Users/chilkat/testData/privkeys/chilkat_pkcs8.pem';
  try {
    privKey.savePkcs8PemFile(path);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  //  RSA DER (unencrypted)
  path = '/Users/chilkat/testData/privkeys/chilkat_rsa.der';
  try {
    privKey.savePkcs1File(path);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // RSA PEM (unencrypted)
  path = '/Users/chilkat/testData/privkeys/chilkat_rsa.pem';
  try {
    privKey.savePemFile(path);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // XML (unencrypted)
  path = '/Users/chilkat/testData/privkeys/chilkat.xml';
  try {
    privKey.saveXmlFile(path);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Private key exported to various formats.');
}