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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright 2017 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License, version
 * 2.0 (the "License"); you may not use this file except in compliance with the
 * License. You may obtain a copy of the License at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package io.netty.example.ocsp;

import java.io.OutputStream;

import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.oiw.OIWObjectIdentifiers;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.cert.ocsp.OCSPReqBuilder;
import org.bouncycastle.crypto.Digest;
import org.bouncycastle.crypto.digests.SHA1Digest;
import org.bouncycastle.crypto.digests.SHA256Digest;
import org.bouncycastle.crypto.io.DigestOutputStream;
import org.bouncycastle.operator.DigestCalculator;

/**
 * BC's {@link OCSPReqBuilder} needs a {@link DigestCalculator} but BC doesn't
 * provide any public implementations of that interface. That's why we need to
 * write our own. There's a default SHA-1 implementation and one for SHA-256.
 * Which one to use will depend on the Certificate Authority (CA).
 */
public final class Digester implements DigestCalculator {

    public static DigestCalculator sha1() {
        Digest digest = new SHA1Digest();
        AlgorithmIdentifier algId = new AlgorithmIdentifier(
                OIWObjectIdentifiers.idSHA1);

        return new Digester(digest, algId);
    }

    public static DigestCalculator sha256() {
        Digest digest = new SHA256Digest();

        // The OID for SHA-256: http://www.oid-info.com/get/2.16.840.1.101.3.4.2.1
        ASN1ObjectIdentifier oid = new ASN1ObjectIdentifier(
                "2.16.840.1.101.3.4.2.1").intern();
        AlgorithmIdentifier algId = new AlgorithmIdentifier(oid);

        return new Digester(digest, algId);
    }

    private final DigestOutputStream dos;

    private final AlgorithmIdentifier algId;

    private Digester(Digest digest, AlgorithmIdentifier algId) {
        this.dos = new DigestOutputStream(digest);
        this.algId = algId;
    }

    @Override
    public AlgorithmIdentifier getAlgorithmIdentifier() {
        return algId;
    }

    @Override
    public OutputStream getOutputStream() {
        return dos;
    }

    @Override
    public byte[] getDigest() {
        return dos.getDigest();
    }
}