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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 and up.

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package org.bouncycastle.asn1.cmc;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.crmf.PKIPublicationInfo;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.util.Arrays;

/**
 * *      CMCPublicationInfo ::= SEQUENCE {
 *           hashAlg                      AlgorithmIdentifier,
 *           certHashes                   SEQUENCE OF OCTET STRING,
 *           pubInfo                      PKIPublicationInfo
 * }
 *
 *
 */
public class CMCPublicationInfo
    extends ASN1Object
{
    private final AlgorithmIdentifier hashAlg;
    private final ASN1Sequence certHashes;
    private final PKIPublicationInfo pubInfo;

    public CMCPublicationInfo(AlgorithmIdentifier hashAlg, byte[][] anchorHashes, PKIPublicationInfo pubInfo)
    {
        this.hashAlg = hashAlg;

        ASN1EncodableVector v = new ASN1EncodableVector(anchorHashes.length);
        for (int i = 0; i != anchorHashes.length; i++)
        {
             v.add(new DEROctetString(Arrays.clone(anchorHashes[i])));
        }
        this.certHashes = new DERSequence(v);

        this.pubInfo = pubInfo;
    }

    private CMCPublicationInfo(ASN1Sequence seq)
    {
        if (seq.size() != 3)
        {
            throw new IllegalArgumentException("incorrect sequence size");
        }
        this.hashAlg = AlgorithmIdentifier.getInstance(seq.getObjectAt(0));
        this.certHashes = ASN1Sequence.getInstance(seq.getObjectAt(1));
        this.pubInfo = PKIPublicationInfo.getInstance(seq.getObjectAt(2));
    }

    public static CMCPublicationInfo getInstance(Object o)
    {
        if (o instanceof CMCPublicationInfo)
        {
            return (CMCPublicationInfo)o;
        }

        if (o != null)
        {
            return new CMCPublicationInfo(ASN1Sequence.getInstance(o));
        }

        return null;
    }

    public AlgorithmIdentifier getHashAlg()
    {
        return hashAlg;
    }

    public byte[][] getCertHashes()
    {
        byte[][] hashes = new byte[certHashes.size()][];

        for (int i = 0; i != hashes.length; i++)
        {
            hashes[i] = Arrays.clone(ASN1OctetString.getInstance(certHashes.getObjectAt(i)).getOctets());
        }

        return hashes;
    }

    public PKIPublicationInfo getPubInfo()
    {
        return pubInfo;
    }

    public ASN1Primitive toASN1Primitive()
    {
        ASN1EncodableVector v = new ASN1EncodableVector(3);

        v.add(hashAlg);
        v.add(certHashes);
        v.add(pubInfo);

        return new DERSequence(v);
    }
}