import com.ibm.dom.util.XPathCanonicalizer;
import com.ibm.xml.sax.StandardErrorHandler;
import java.io.File;
import org.xml.sax.InputSource;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.security.Key;
import java.security.KeyStore;
import java.security.cert.X509Certificate;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Node;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import com.ibm.xml.dsig.KeyInfo;
import com.ibm.xml.dsig.SignatureContext;
import com.ibm.xml.dsig.util.AdHocIDResolver;
import com.ibm.xml.dsig.util.DOMParserNS;
import org.apache.xerces.parsers.DOMParser;
import org.w3c.dom.NodeList;
public class XMLDSigSampleWithKeyName{
private static String keyStorePath = "tourOperatorDSAKey";
private static String alias = "myTourOperatorKey";
private static String storePass = new String("myKeyStorePass");
private static String keyPass = new String("myKeyPass");
private static String signatureTemplateFile = "SignatureTemplate.xml";
private static String inputFile = "input.xml";
private static String outputFile = "XMLDSigWithKeyNameOutput.xml";
public static void main ( String argv[] ) throws Exception{
/*********Step1*********/
DocumentBuilder builder = DOMParserNS.createBuilder();
builder.setErrorHandler(new StandardErrorHandler());
Document inputDoc = builder.parse(inputFile);
/*********Step2*********/
Element elementToBeSigned = null;
NodeList nodes = inputDoc.getDocumentElement().getChildNodes();
for ( int i = 0; i < nodes.getLength(); i++ ){
if ( nodes.item(i).getNodeType() == Node.ELEMENT_NODE ){
elementToBeSigned = (Element) nodes.item(i);
break;
}// end of if
}// end of for
/*********Step3*********/
String elementToBeSignedId = elementToBeSigned.getAttribute( "Id" );
/*********Step4*********/
Document templateDoc = builder.parse(signatureTemplateFile);
Element templateElement =
(Element) inputDoc.importNode( templateDoc.getDocumentElement(), true );
inputDoc.getDocumentElement().appendChild (templateElement);
/*********Step5*********/
Element reference = (Element) templateElement.
getElementsByTagName("Reference").item(0);
reference.setAttribute( "URI", "#" + elementToBeSignedId );
/*********Step6*********/
KeyStore keystore = KeyStore.getInstance("JKS");
keystore.load(
new FileInputStream(keyStorePath),
storePass.toCharArray() );
X509Certificate cert =
(X509Certificate)keystore.getCertificate(alias);
Key key = keystore.getKey(alias, keyPass.toCharArray());
if (key == null) {
throw new RuntimeException("Could not get a private key: "+alias);
}
/*********Step7*********/
/*********Step8*********/
KeyInfo keyInfo = new KeyInfo();
String keyNames[] = {alias};
keyInfo.setKeyNames(keyNames);
/*********Step9*********/
keyInfo.insertTo(templateElement);
/*********Step10*********/
SignatureContext sigContext = new SignatureContext();
/*********Step11*********/
sigContext.setIDResolver(new AdHocIDResolver(inputDoc));
/*********Step12*********/
sigContext.sign(templateElement, key);
/*********Step13*********/
OutputStream os = new FileOutputStream(outputFile);
printDocument(inputDoc, os);
os.close();
}//end of main
public static void printDocument(Document doc, OutputStream out)
throws IOException {
Writer wr = new OutputStreamWriter(out, "UTF-8");
XPathCanonicalizer.serializeAll(doc, true, wr);
wr.flush();
}// end of printDocument method
}// end of class