Dart

DSA Generate Key

See more DSA Examples

Generates a DSA public/private key pair and saves to PEM and DER file formats (both encrypted and non-encrypted).

An encrypted DSA PEM looks like this:

-----BEGIN DSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,9DAFD5C4CD62A5D0

QwDdp66sB0qKXQli7FbVcKL/eo3wu7kGRlV2sI8XbkNa1RTLiwnwTWDB0dqyWRQ8
...
Bx0HVfxKiNgCbL6BQEnYD+GOmMcckuj9Uhgloe/YuXCIDJBGhjUt/li3hvR/PXeC

V2xxNl1XKBE88njqi+UXt4vjGVNLpvXM
-----END DSA PRIVATE KEY-----

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();

  // Call GenKey to generate a new DSA key.
  // The number of bits should be at least 1024 and a multiple
  // of 64.   Typical values are either 1024 or 2048.
  // DSA key generation is compute intensive and may take
  // a short while to complete.
  try {
    dsa.genKey(2048);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Extract the private and public parts to PEM or DER format
  // and save to 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(xmlStr, '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(xmlStr, 'dsa_priv.xml');

  print('Finished!');
}