Generate new DSA Key from OpenSSL Parameters File

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

 Chilkat Java Library Downloads for Windows, Linux, and MAC OS X

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success;

    CkDsa dsa = new CkDsa();

    success = dsa.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        System.out.println(dsa.lastErrorText());
        return;
    }

    success = dsa.GenKeyFromParamsDerFile("dsaparam.der");
    if (success != true) {
        System.out.println(dsa.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.

    String pemStr;
    String 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...
    success = dsa.SaveText(pemStr,"dsa_pub.pem");

    //  Save the public key in DER format:
    success = dsa.ToPublicDerFile("dsa_pub.der");

    boolean bPublicOnly;
    bPublicOnly = true;
    //  Save to XML
    xmlStr = dsa.toXml(bPublicOnly);
    success = dsa.SaveText(pemStr,"dsa_pub.xml");

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

    //  Unencrypted PEM:
    pemStr = dsa.toPem();
    success = dsa.SaveText(pemStr,"dsa_priv.pem");

    //  Encrypted PEM:
    pemStr = dsa.toEncryptedPem("myPassword");
    success = dsa.SaveText(pemStr,"dsa_privEncrypted.pem");

    //  DER:
    success = dsa.ToDerFile("dsa_priv.der");

    //  XML:
    bPublicOnly = false;
    xmlStr = dsa.toXml(bPublicOnly);
    success = dsa.SaveText(pemStr,"dsa_priv.xml");

    System.out.println("Finished!");
  }
}