Dart

Generate new DSA Key from OpenSSL Parameters File

See more DSA Examples

Generates a new DSA key from an OpenSSL-created parameters file (DER and PEM formats supported). Examples of using OpenSSL to create parameter files are shown here:

openssl dsaparam -outform DER 1024 <  seedData.txt >dsaparam.der

openssl dsaparam 1024 < seedData.txt >dsaparam.pem

Dart

import 'package:chilkat/chilkat.dart';

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

  final dsa = CkDsa();

  try {
    dsa.genKeyFromParamsDerFile('dsaparam.der');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // To generate a key from PEM, call GenKeyFromParamsPem 
  // (for an in-memory PEM string) or GenKeyFromParamsFilePem
  // for a PEM file.

  // The public and private keys may now be exported to PEM, DER,
  // and XML formatted files.

  var pemStr = '';
  var xmlStr = '';

  // First for the public key...
  // The public key never needs to be encrypted.

  // Save the public key in PEM format:
  pemStr = dsa.toPublicPem();
  // This example will not check the return value of SaveText...
  dsa.saveText(pemStr, 'dsa_pub.pem');

  // Save the public key in DER format:
  dsa.toPublicDerFile('dsa_pub.der');

  var bPublicOnly = true;
  // Save to XML
  xmlStr = dsa.toXml(bPublicOnly);
  dsa.saveText(pemStr, 'dsa_pub.xml');

  // ------------------------------------
  // Now for the private key....
  // ------------------------------------

  // Unencrypted PEM:
  pemStr = dsa.toPem();
  dsa.saveText(pemStr, 'dsa_priv.pem');

  // Encrypted PEM:
  pemStr = dsa.toEncryptedPem('myPassword');
  dsa.saveText(pemStr, 'dsa_privEncrypted.pem');

  // DER:
  dsa.toDerFile('dsa_priv.der');

  // XML:
  bPublicOnly = false;
  xmlStr = dsa.toXml(bPublicOnly);
  dsa.saveText(pemStr, 'dsa_priv.xml');

  print('Finished!');
}