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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.8 and up. The APIs are designed primarily to be used in conjunction with the BC LTS provider but may also be used with other providers providing cryptographic services.

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package org.bouncycastle.dvcs;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.cms.ContentInfo;
import org.bouncycastle.asn1.cms.SignedData;
import org.bouncycastle.asn1.dvcs.DVCSObjectIdentifiers;
import org.bouncycastle.cms.CMSSignedData;

/**
 * DVCResponse is general response to DVCS (RFC 3029).
 * It represents responses for all types of services.
 */
public class DVCSResponse
    extends DVCSMessage
{
    private org.bouncycastle.asn1.dvcs.DVCSResponse asn1;

    /**
     * Constructs DVCResponse from CMS SignedData object.
     *
     * @param signedData the CMS SignedData object containing the request
     * @throws org.bouncycastle.dvcs.DVCSConstructionException
     */
    public DVCSResponse(CMSSignedData signedData)
        throws DVCSConstructionException
    {
        this(SignedData.getInstance(signedData.toASN1Structure().getContent()).getEncapContentInfo());
    }

    /**
     * Construct a DVCS Response from a ContentInfo
     *
     * @param contentInfo the contentInfo representing the DVCSRequest
     * @throws org.bouncycastle.dvcs.DVCSConstructionException
     */
    public DVCSResponse(ContentInfo contentInfo)
        throws DVCSConstructionException
    {
        super(contentInfo);

        if (!DVCSObjectIdentifiers.id_ct_DVCSResponseData.equals(contentInfo.getContentType()))
        {
            throw new DVCSConstructionException("ContentInfo not a DVCS Response");
        }

        try
        {
            if (contentInfo.getContent().toASN1Primitive() instanceof ASN1Sequence)
            {
                this.asn1 = org.bouncycastle.asn1.dvcs.DVCSResponse.getInstance(contentInfo.getContent());
            }
            else
            {
                this.asn1 = org.bouncycastle.asn1.dvcs.DVCSResponse.getInstance(ASN1OctetString.getInstance(contentInfo.getContent()).getOctets());
            }
        }
        catch (Exception e)
        {
            throw new DVCSConstructionException("Unable to parse content: " + e.getMessage(), e);
        }
    }

    /**
     * Return the ASN.1 DVCSResponse structure making up the body of this response.
     *
     * @return an org.bouncycastle.asn1.dvcs.DVCSResponse object.
     */
    public ASN1Encodable getContent()
    {
        return asn1;
    }
}