Dart

Change Password for Java KeyStore File

See more Java KeyStore (JKS) Examples

Demonstrates how to load a Java keystore, change the password, and save using the new password. If the Java keystore contains only trusted root certificates, then it's simply a matter of loading the JKS with the existing password, and then saving with a new password. If the JKS contains private key entries, then each private key entry must be re-keyed using the new password by calling the ChangePassword method. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This requires the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final jks = CkJavaKeyStore();

  final oldJksPassword = 'existingPassword';
  final newJksPassword = 'newPassword';
  final jksPath = '/someDir/keyStore.jks';

  // Load the Java keystore from a file.
  try {
    jks.loadFile(oldJksPassword, jksPath);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // If the JKS contains private key entries, then each
  // must be re-keyed with the new password by calling ChangePassword.
  final numPrivateKeys = jks.numPrivateKeys;

  var i = 0;
  while (i < numPrivateKeys) {

    try {
      jks.changePassword(i, oldJksPassword, newJksPassword);
    } on ChilkatException catch (e) {
      print(e.lastErrorText);
      return;
    }

    i++;
  }

  // Write the JKS using the new password for the JKS file's keyed digest.
  try {
    jks.toFile(newJksPassword, jksPath);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Updated the password for the Java keystore file.');
}