javax.xml.crypto.dom

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1. Creating a KeyInfo from an X509Certificate

import javax.xml.crypto.KeyInfo;
import javax.xml.crypto.KeyInfoFactory;
import javax.xml.crypto.dom.DOMStructure;
import javax.xml.crypto.dsig.keyinfo.X509Data;
import java.security.cert.X509Certificate;

public class CreateKeyInfoFromX509Certificate {

    public static void main(String[] args) throws Exception {
        // Create a KeyInfoFactory
        KeyInfoFactory keyInfoFactory = KeyInfoFactory.getInstance();

        // Create an X509Data object
        X509Data x509Data = keyInfoFactory.newX509Data(java.util.Collections.singletonList(new DOMStructure(x509Certificate)));

        // Create a KeyInfo object
        KeyInfo keyInfo = keyInfoFactory.newKeyInfo(java.util.Collections.singletonList(x509Data));
    }
}

2. Creating a KeyValue from an X509Certificate

import javax.xml.crypto.dom.DOMStructure;
import javax.xml.crypto.dsig.keyinfo.KeyValue;
import javax.xml.crypto.dsig.keyinfo.X509Data;
import java.security.cert.X509Certificate;

public class CreateKeyValueFromX509Certificate {

    public static void main(String[] args) throws Exception {
        // Create an X509Data object
        X509Data x509Data = new X509Data(java.util.Collections.singletonList(new DOMStructure(x509Certificate)));

        // Create a KeyValue object
        KeyValue keyValue = new KeyValue(x509Data);
    }
}

3. Creating a RetrievalMethod from a URI

import javax.xml.crypto.URIDereferencer;
import javax.xml.crypto.dom.DOMStructure;
import javax.xml.crypto.dsig.keyinfo.RetrievalMethod;

public class CreateRetrievalMethodFromURI {

    public static void main(String[] args) throws Exception {
        // Create a URI
        String uri = "http://example.com/key.xml";

        // Create a RetrievalMethod object
        RetrievalMethod retrievalMethod = new RetrievalMethod(uri);
    }
}

4. Creating a RetrievalMethod from a DOMStructure

import javax.xml.crypto.dom.DOMStructure;
import javax.xml.crypto.dsig.keyinfo.RetrievalMethod;

public class CreateRetrievalMethodFromDOMStructure {

    public static void main(String[] args) throws Exception {
        // Create a DOMStructure
        DOMStructure domStructure = new DOMStructure(element);

        // Create a RetrievalMethod object
        RetrievalMethod retrievalMethod = new RetrievalMethod(domStructure);
    }
}

5. Creating a RetrievalMethod from a URIDereferencer

import javax.xml.crypto.URIDereferencer;
import javax.xml.crypto.dom.DOMStructure;
import javax.xml.crypto.dsig.keyinfo.RetrievalMethod;

public class CreateRetrievalMethodFromURIDereferencer {

    public static void main(String[] args) throws Exception {
        // Create a URIDereferencer
        URIDereferencer uriDereferencer = new MyURIDereferencer();

        // Create a DOMStructure
        DOMStructure domStructure = new DOMStructure(element);

        // Create a RetrievalMethod object
        RetrievalMethod retrievalMethod = new RetrievalMethod(uriDereferencer, domStructure);
    }
}

6. Creating a PGPData object

import javax.xml.crypto.dom.DOMStructure;
import javax.xml.crypto.dsig.keyinfo.PGPData;

public class CreatePGPData {

    public static void main(String[] args) throws Exception {
        // Create a DOMStructure object
        DOMStructure domStructure = new DOMStructure(element);

        // Create a PGPData object
        PGPData pgpData = new PGPData(domStructure);
    }
}

7. Creating a PGPData object with a KeyID

import javax.xml.crypto.dom.DOMStructure;
import javax.xml.crypto.dsig.keyinfo.PGPData;

public class CreatePGPDataWithKeyID {

    public static void main(String[] args) throws Exception {
        // Create a DOMStructure object
        DOMStructure domStructure = new DOMStructure(element);

        // Create a PGPData object
        PGPData pgpData = new PGPData(domStructure, "keyID");
    }
}

8. Creating a PGPData object with a KeyPacket

import javax.xml.bind.DatatypeConverter;
import javax.xml.crypto.dom.DOMStructure;
import javax.xml.crypto.dsig.keyinfo.PGPData;

public class CreatePGPDataWithKeyPacket {

    public static void main(String[] args) throws Exception {
        // Convert the key packet to a byte array
        byte[] keyPacket = DatatypeConverter.parseBase64Binary("...");

        // Create a DOMStructure object
        DOMStructure domStructure = new DOMStructure(element);

        // Create a PGPData object
        PGPData pgpData = new PGPData(domStructure, keyPacket);
    }
}

9. Creating a PGPData object with a Fingerprint

import javax.xml.crypto.dom.DOMStructure;
import javax.xml.crypto.dsig.keyinfo.PGPData;

public class CreatePGPDataWithFingerprint {

    public static void main(String[] args) throws Exception {
        // Create a DOMStructure object
        DOMStructure domStructure = new DOMStructure(element);

        // Create a PGPData object
        PGPData pgpData = new PGPData(domStructure, "fingerprint");
    }
}

10. Creating a SPKIData object

import javax.xml.crypto.dom.DOMStructure;
import javax.xml.crypto.dsig.keyinfo.SPKIData;

public class CreateSPKIData {

    public static void main(String[] args) throws Exception {
        // Create a DOMStructure object
        DOMStructure domStructure = new DOMStructure(element);

        // Create a SPKIData object
        SPKIData spkiData = new SPKIData(domStructure);
    }