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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, 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.

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package org.bouncycastle.cert.cmp;

import java.io.IOException;

import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.cmp.PKIBody;
import org.bouncycastle.asn1.cmp.PKIHeader;
import org.bouncycastle.asn1.cmp.PKIMessage;
import org.bouncycastle.cert.CertIOException;

/**
 * General wrapper for a generic PKIMessage
 */
public class GeneralPKIMessage
{
    private final PKIMessage pkiMessage;

    private static PKIMessage parseBytes(byte[] encoding)
        throws IOException
    {
        try
        {
            return PKIMessage.getInstance(ASN1Primitive.fromByteArray(encoding));
        }
        catch (ClassCastException e)
        {
            throw new CertIOException("malformed data: " + e.getMessage(), e);
        }
        catch (IllegalArgumentException e)
        {
            throw new CertIOException("malformed data: " + e.getMessage(), e);
        }
    }

    /**
     * Create a PKIMessage from the passed in bytes.
     *
     * @param encoding BER/DER encoding of the PKIMessage
     * @throws IOException in the event of corrupted data, or an incorrect structure.
     */
    public GeneralPKIMessage(byte[] encoding)
        throws IOException
    {
        this(parseBytes(encoding));
    }

    /**
     * Wrap a PKIMessage ASN.1 structure.
     *
     * @param pkiMessage base PKI message.
     */
    public GeneralPKIMessage(PKIMessage pkiMessage)
    {
        this.pkiMessage = pkiMessage;
    }

    public PKIHeader getHeader()
    {
        return pkiMessage.getHeader();
    }

    public PKIBody getBody()
    {
        return pkiMessage.getBody();
    }

    /**
     * Return true if this message has protection bits on it. A return value of true
     * indicates the message can be used to construct a ProtectedPKIMessage.
     *
     * @return true if message has protection, false otherwise.
     */
    public boolean hasProtection()
    {
        return pkiMessage.getHeader().getProtectionAlg() != null;
    }

    public PKIMessage toASN1Structure()
    {
        return pkiMessage;
    }
}