org.bouncycastle.asn1.x509.ObjectDigestInfo Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of bcprov-ext-debug-jdk18on Show documentation
The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for Java 1.8 and later with debug enabled.
The newest version!
package org.bouncycastle.asn1.x509;

import org.bouncycastle.asn1.ASN1BitString;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Enumerated;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
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;

/**
 * ObjectDigestInfo ASN.1 structure used in v2 attribute certificates.
 * 
 *  *  
 *    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
 *    }
 *   
 * 
 * 
 */
public class ObjectDigestInfo
    extends ASN1Object
{
    /**
     * The public key is hashed.
     */
    public final static int publicKey = 0;

    /**
     * The public key certificate is hashed.
     */
    public final static int publicKeyCert = 1;

    /**
     * An other object is hashed.
     */
    public final static int otherObjectDigest = 2;

    ASN1Enumerated digestedObjectType;

    ASN1ObjectIdentifier otherObjectTypeID;

    AlgorithmIdentifier digestAlgorithm;

    ASN1BitString objectDigest;

    public static ObjectDigestInfo getInstance(
        Object obj)
    {
        if (obj instanceof ObjectDigestInfo)
        {
            return (ObjectDigestInfo)obj;
        }

        if (obj != null)
        {
            return new ObjectDigestInfo(ASN1Sequence.getInstance(obj));
        }

        return null;
    }

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

    /**
     * Constructor from given details.
     * 
     * If digestedObjectType is not {@link #publicKeyCert} or
     * {@link #publicKey} otherObjectTypeID must be given,
     * otherwise it is ignored.
     * 
     * @param digestedObjectType The digest object type.
     * @param otherObjectTypeID The object type ID for
     *            otherObjectDigest.
     * @param digestAlgorithm The algorithm identifier for the hash.
     * @param objectDigest The hash value.
     */
    public ObjectDigestInfo(
        int digestedObjectType,
        ASN1ObjectIdentifier otherObjectTypeID,
        AlgorithmIdentifier digestAlgorithm,
        byte[] objectDigest)
    {
        this.digestedObjectType = new ASN1Enumerated(digestedObjectType);
        if (digestedObjectType == otherObjectDigest)
        {
            this.otherObjectTypeID = otherObjectTypeID;
        }

        this.digestAlgorithm = digestAlgorithm;
        this.objectDigest = new DERBitString(objectDigest);
    }

    private ObjectDigestInfo(
        ASN1Sequence seq)
    {
        if (seq.size() > 4 || seq.size() < 3)
        {
            throw new IllegalArgumentException("Bad sequence size: "
                + seq.size());
        }

        digestedObjectType = ASN1Enumerated.getInstance(seq.getObjectAt(0));

        int offset = 0;

        if (seq.size() == 4)
        {
            otherObjectTypeID = ASN1ObjectIdentifier.getInstance(seq.getObjectAt(1));
            offset++;
        }

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

        objectDigest = ASN1BitString.getInstance(seq.getObjectAt(2 + offset));
    }

    public ASN1Enumerated getDigestedObjectType()
    {
        return digestedObjectType;
    }

    public ASN1ObjectIdentifier getOtherObjectTypeID()
    {
        return otherObjectTypeID;
    }

    public AlgorithmIdentifier getDigestAlgorithm()
    {
        return digestAlgorithm;
    }

    public ASN1BitString getObjectDigest()
    {
        return objectDigest;
    }

    /**
     * Produce an object suitable for an ASN1OutputStream.
     * 
     * 
     *  
     *    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
     *    }
     *   
     * 
     */
    public ASN1Primitive toASN1Primitive()
    {
        ASN1EncodableVector v = new ASN1EncodableVector(4);

        v.add(digestedObjectType);

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

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

        return new DERSequence(v);
    }
}