source: fedd/abac-src/ttg/credential/SignDomain.java @ eec716b

package com.nailabs.abac.credential;

import java.security.*;
import java.security.cert.*;
import org.w3c.dom.*;
import org.apache.xml.security.signature.*;
import org.apache.xml.security.exceptions.*;
import org.apache.xml.security.transforms.Transforms;
import org.apache.xml.security.utils.*;

public class SignDomain extends Application {
    /** signature algorithm is set to DSA */
    protected static String SIG_TYPE = XMLSignature.ALGO_ID_SIGNATURE_DSA;
    /** digest algorithm is SHA-1 */
    protected static String DIGEST_TYPE = Constants.ALGO_ID_DIGEST_SHA1;

    protected static String KEY_PAIR_TYPE = "DSA";

    protected PrivateKey privateKey = null;

    protected PublicKey publicKey = null;
    
    protected X509Certificate cert = null;

    protected String base64Digest;

    protected String hexDigest;

    /** 
     * Constructor for the application which reads in an XML document, 
     * parses the doc into a DOM tree, signs the document, and writes
     * the signed tree into an XML file. Cryptographic material is supplied
     * by a Java keystore.
     */
    public SignDomain(String argv[]) {
        super(argv);
        name = "SignDomain";
        parseParameters();
        getKeys();
        readDoc();
        signDoc();
        writeDoc();
    }

    private void signDoc() {
        try {
            String baseURI = outXML.toURL().toString();
            XMLSignature sig = new XMLSignature( doc, baseURI, SIG_TYPE);
            docElement.appendChild( sig.getElement() );
            Transforms transforms = new Transforms( doc );
            transforms.addTransform( Transforms.TRANSFORM_ENVELOPED_SIGNATURE);
            transforms.addTransform( Transforms.TRANSFORM_C14N_WITH_COMMENTS);
            String referenceURI = noComments ? "" : "#xpointer(/)";
            sig.addDocument(referenceURI,transforms, DIGEST_TYPE);
            sig.addKeyInfo( publicKey );
            sig.sign( privateKey );
            
            //Element digestValueElem = sig.getSignedInfo().item( 0 ).getChildElementLocalName( 0, Constants.SignatureSpecNS, Constants._TAG_DIGESTVALUE );
            //byte[] elemDig = Base64.decode( digestValueElem );
            byte[] elemDig = sig.getSignedInfo().item(0).getDigestValue();
            base64Digest = Base64.encode( elemDig );
            //hexDigest = HexDump.byteArrayToHexString(elemDig);
            hexDigest = "";
        } catch( org.apache.xml.security.exceptions.XMLSecurityException sec) {
            sec.printStackTrace();
        } catch( java.net.MalformedURLException murle ) {
            murle.printStackTrace();
        } catch( Exception e ) {
            e.printStackTrace();
        }
    }
    
    private void printDigest() {
        System.out.println( base64Digest );
        System.out.println( hexDigest );
    }

    private void generateKeyPair() {
        try {
            KeyPairGenerator kpg = KeyPairGenerator.getInstance( "DSA" );
            kpg.initialize( 512 );
            KeyPair newKeyPair = kpg.generateKeyPair();
            privateKey = newKeyPair.getPrivate();
            publicKey = newKeyPair.getPublic();
        } catch( java.security.NoSuchAlgorithmException nsae ) {
            nsae.printStackTrace();
        }
    }

    /** standard main routine for launching the application */
    public static void main(String argv[]) {
        SignDomain sc = new SignDomain(argv);
    }

}