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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, S/MIME and certificate generation. The APIs are designed primarily to be used in conjunction with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified and used appropriately.

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package org.bouncycastle.cms;

import java.io.IOException;
import java.io.OutputStream;
import java.util.Iterator;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1Encoding;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.ASN1Sequence;

public class PKCS7ProcessableObject
    implements CMSTypedData
{
    private final ASN1ObjectIdentifier type;
    private final ASN1Encodable structure;

    public PKCS7ProcessableObject(
        ASN1ObjectIdentifier type,
        ASN1Encodable structure)
    {
        this.type = type;
        this.structure = structure;
    }

    public ASN1ObjectIdentifier getContentType()
    {
        return type;
    }

    public void write(OutputStream cOut)
        throws IOException, CMSException
    {
        if (structure instanceof ASN1Sequence)
        {
            ASN1Sequence s = ASN1Sequence.getInstance(structure);

            for (Iterator it = s.iterator(); it.hasNext();)
            {
                ASN1Encodable enc = (ASN1Encodable)it.next();

                cOut.write(enc.toASN1Primitive().getEncoded(ASN1Encoding.DER));
            }
        }
        else
        {
            byte[] encoded = structure.toASN1Primitive().getEncoded(ASN1Encoding.DER);
            int index = 1;

            while ((encoded[index] & 0xff) > 127)
            {
                index++;
            }

            index++;

            cOut.write(encoded, index, encoded.length - index);
        }
    }

    public Object getContent()
    {
        return structure;
    }
}