org.glite.voms.ac.ObjectDigestInfo.java Source code

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Here is the source code for org.glite.voms.ac.ObjectDigestInfo.java

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/*
 * Copyright (c) Members of the EGEE Collaboration. 2004.
 * See http://eu-egee.org/partners/ for details on the copyright holders.
 * For license conditions see the license file or http://eu-egee.org/license.html
 */

package org.glite.voms.ac;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERBitString;
import org.bouncycastle.asn1.DEREnumerated;
import org.bouncycastle.asn1.DERObjectIdentifier;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERTaggedObject;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;

import java.io.IOException;

public class ObjectDigestInfo implements ASN1Encodable {
    DEREnumerated digestedObjectType;
    DERObjectIdentifier otherObjectTypeID;
    AlgorithmIdentifier digestAlgorithm;
    DERBitString objectDigest;

    public ObjectDigestInfo(ASN1Sequence seq) throws IOException {
        digestedObjectType = DEREnumerated.getInstance((DERTaggedObject) seq.getObjectAt(0));

        int offset = 0;

        if (seq.size() == 4) {
            otherObjectTypeID = DERObjectIdentifier.getInstance(seq.getObjectAt(1));
            offset++;
        }

        digestAlgorithm = AlgorithmIdentifier.getInstance(seq.getObjectAt(1 + offset));

        objectDigest = new DERBitString(seq.getObjectAt(2 + offset));
    }

    public DEREnumerated getDigestedObjectType() {
        return digestedObjectType;
    }

    public DERObjectIdentifier getOtherObjectTypeID() {
        return otherObjectTypeID;
    }

    public AlgorithmIdentifier getDigestAlgorithm() {
        return digestAlgorithm;
    }

    public DERBitString getObjectDigest() {
        return objectDigest;
    }

    /**
     * Produce an object suitable for an ASN1OutputStream.
     * <pre>
     *  ObjectDigestInfo ::= SEQUENCE {
     *       digestedObjectType  ENUMERATED {
     *               publicKey            (0),
     *               publicKeyCert        (1),
     *               otherObjectTypes     (2) },
     *                       -- otherObjectTypes MUST NOT
     *                       -- be used in this profile
     *       otherObjectTypeID   OBJECT IDENTIFIER OPTIONAL,
     *       digestAlgorithm     AlgorithmIdentifier,
     *       objectDigest        BIT STRING
     *  }
     * </pre>
     */
    public ASN1Primitive toASN1Primitive() {
        ASN1EncodableVector v = new ASN1EncodableVector();

        v.add(digestedObjectType);

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

        v.add(digestAlgorithm);
        v.add(objectDigest);

        return new DERSequence(v);
    }
}