MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.io.OutputStreamWriter;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.SecureRandom;
import java.security.Security;
import java.util.Vector;

import javax.security.auth.x500.X500Principal;

import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.DERSet;
import org.bouncycastle.asn1.pkcs.Attribute;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.asn1.x509.GeneralName;
import org.bouncycastle.asn1.x509.GeneralNames;
import org.bouncycastle.asn1.x509.X509Extension;
import org.bouncycastle.asn1.x509.X509Extensions;
import org.bouncycastle.jce.PKCS10CertificationRequest;
import org.bouncycastle.openssl.PEMWriter;

public class MainClass {
    public static PKCS10CertificationRequest generateRequest(KeyPair pair) throws Exception {
        GeneralNames subjectAltName = new GeneralNames(new GeneralName(GeneralName.rfc822Name, "test@test.test"));
        Vector oids = new Vector();
        Vector values = new Vector();

        oids.add(X509Extensions.SubjectAlternativeName);
        values.add(new X509Extension(false, new DEROctetString(subjectAltName)));

        X509Extensions extensions = new X509Extensions(oids, values);

        Attribute attribute = new Attribute(PKCSObjectIdentifiers.pkcs_9_at_extensionRequest,
                new DERSet(extensions));

        return new PKCS10CertificationRequest("SHA256withRSA", new X500Principal("CN=Requested Test Certificate"),
                pair.getPublic(), new DERSet(attribute), pair.getPrivate());
    }

    public static void main(String[] args) throws Exception {
        Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
        KeyPairGenerator kpGen = KeyPairGenerator.getInstance("RSA", "BC");
        kpGen.initialize(1024, new SecureRandom());

        KeyPair pair = kpGen.generateKeyPair();

        PKCS10CertificationRequest request = generateRequest(pair);

        PEMWriter pemWrt = new PEMWriter(new OutputStreamWriter(System.out));
        pemWrt.writeObject(request);
        pemWrt.close();
    }
}
/*-----BEGIN CERTIFICATE REQUEST-----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-----END CERTIFICATE REQUEST-----
*/