MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.SecureRandom;
import java.util.Collections;

import javax.xml.crypto.dsig.CanonicalizationMethod;
import javax.xml.crypto.dsig.DigestMethod;
import javax.xml.crypto.dsig.Reference;
import javax.xml.crypto.dsig.SignatureMethod;
import javax.xml.crypto.dsig.SignedInfo;
import javax.xml.crypto.dsig.XMLSignature;
import javax.xml.crypto.dsig.XMLSignatureFactory;
import javax.xml.crypto.dsig.keyinfo.KeyInfo;
import javax.xml.crypto.dsig.keyinfo.KeyInfoFactory;
import javax.xml.crypto.dsig.keyinfo.KeyValue;
import javax.xml.crypto.dsig.spec.C14NMethodParameterSpec;

public class MainClass {

    public static void main(String[] args) throws Exception {

        KeyPairGenerator kpg = KeyPairGenerator.getInstance("DSA");
        kpg.initialize(1024, new SecureRandom());
        KeyPair dsaKeyPair = kpg.generateKeyPair();

        XMLSignatureFactory sigFactory = XMLSignatureFactory.getInstance();
        Reference ref = sigFactory.newReference("#Body", sigFactory.newDigestMethod(DigestMethod.SHA1, null));
        SignedInfo signedInfo = sigFactory.newSignedInfo(
                sigFactory.newCanonicalizationMethod(CanonicalizationMethod.INCLUSIVE_WITH_COMMENTS,
                        (C14NMethodParameterSpec) null),
                sigFactory.newSignatureMethod(SignatureMethod.DSA_SHA1, null), Collections.singletonList(ref));
        KeyInfoFactory kif = sigFactory.getKeyInfoFactory();
        KeyValue kv = kif.newKeyValue(dsaKeyPair.getPublic());
        KeyInfo keyInfo = kif.newKeyInfo(Collections.singletonList(kv));

        XMLSignature xmlSig = sigFactory.newXMLSignature(signedInfo, keyInfo);
    }
}