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The Bouncy Castle Java APIs for ASN.1 extension and utility APIs used to support bcpkix and bctls. This jar contains APIs for JDK 1.5 and up.
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package org.bouncycastle.asn1.cmp;

import java.math.BigInteger;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERBitString;
import org.bouncycastle.asn1.DERSequence;

public class PKIStatusInfo
    extends ASN1Object
{
    ASN1Integer      status;
    PKIFreeText     statusString;
    DERBitString    failInfo;

    public static PKIStatusInfo getInstance(
        ASN1TaggedObject obj,
        boolean explicit)
    {
        return getInstance(ASN1Sequence.getInstance(obj, explicit));
    }

    public static PKIStatusInfo getInstance(
        Object obj)
    {
        if (obj instanceof PKIStatusInfo)
        {
            return (PKIStatusInfo)obj;
        }
        else if (obj != null)
        {
            return new PKIStatusInfo(ASN1Sequence.getInstance(obj));
        }

        return null;
    }

    private PKIStatusInfo(
        ASN1Sequence seq)
    {
        this.status = ASN1Integer.getInstance(seq.getObjectAt(0));

        this.statusString = null;
        this.failInfo = null;

        if (seq.size() > 2)
        {
            this.statusString = PKIFreeText.getInstance(seq.getObjectAt(1));
            this.failInfo = DERBitString.getInstance(seq.getObjectAt(2));
        }
        else if (seq.size() > 1)
        {
            Object obj = seq.getObjectAt(1); 
            if (obj instanceof DERBitString)
            {
                this.failInfo = DERBitString.getInstance(obj);
            }
            else
            {
                this.statusString = PKIFreeText.getInstance(obj);
            }
        }
    }

    /**
     * @param status
     */
    public PKIStatusInfo(PKIStatus status)
    {
        this.status = ASN1Integer.getInstance(status.toASN1Primitive());
    }

    /**
     *
     * @param status
     * @param statusString
     */
    public PKIStatusInfo(
        PKIStatus   status,
        PKIFreeText statusString)
    {
        this.status = ASN1Integer.getInstance(status.toASN1Primitive());
        this.statusString = statusString;
    }

    public PKIStatusInfo(
        PKIStatus      status,
        PKIFreeText    statusString,
        PKIFailureInfo failInfo)
    {
        this.status = ASN1Integer.getInstance(status.toASN1Primitive());
        this.statusString = statusString;
        this.failInfo = failInfo;
    }
    
    public BigInteger getStatus()
    {
        return status.getValue();
    }

    public PKIFreeText getStatusString()
    {
        return statusString;
    }

    public DERBitString getFailInfo()
    {
        return failInfo;
    }

    /**
     *      * PKIStatusInfo ::= SEQUENCE {
     *     status        PKIStatus,                (INTEGER)
     *     statusString  PKIFreeText     OPTIONAL,
     *     failInfo      PKIFailureInfo  OPTIONAL  (BIT STRING)
     * }
     *
     * PKIStatus:
     *   granted                (0), -- you got exactly what you asked for
     *   grantedWithMods        (1), -- you got something like what you asked for
     *   rejection              (2), -- you don't get it, more information elsewhere in the message
     *   waiting                (3), -- the request body part has not yet been processed, expect to hear more later
     *   revocationWarning      (4), -- this message contains a warning that a revocation is imminent
     *   revocationNotification (5), -- notification that a revocation has occurred
     *   keyUpdateWarning       (6)  -- update already done for the oldCertId specified in CertReqMsg
     *
     * PKIFailureInfo:
     *   badAlg           (0), -- unrecognized or unsupported Algorithm Identifier
     *   badMessageCheck  (1), -- integrity check failed (e.g., signature did not verify)
     *   badRequest       (2), -- transaction not permitted or supported
     *   badTime          (3), -- messageTime was not sufficiently close to the system time, as defined by local policy
     *   badCertId        (4), -- no certificate could be found matching the provided criteria
     *   badDataFormat    (5), -- the data submitted has the wrong format
     *   wrongAuthority   (6), -- the authority indicated in the request is different from the one creating the response token
     *   incorrectData    (7), -- the requester's data is incorrect (for notary services)
     *   missingTimeStamp (8), -- when the timestamp is missing but should be there (by policy)
     *   badPOP           (9)  -- the proof-of-possession failed
     *
     * 
     */
    public ASN1Primitive toASN1Primitive()
    {
        ASN1EncodableVector  v = new ASN1EncodableVector(3);

        v.add(status);

        if (statusString != null)
        {
            v.add(statusString);
        }

        if (failInfo!= null)
        {
            v.add(failInfo);
        }

        return new DERSequence(v);
    }
}