org.bouncycastle.asn1.crmf.DhSigStatic Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of bcutil-jdk15to18 Show documentation

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 to JDK 1.8.

There is a newer version: 1.78.1

Show newest version

package org.bouncycastle.asn1.crmf;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.cms.IssuerAndSerialNumber;
import org.bouncycastle.util.Arrays;

/**
 * From RFC 2875 for Diffie-Hellman POP.
 *  *     DhSigStatic ::= SEQUENCE {
 *         IssuerAndSerial IssuerAndSerialNumber OPTIONAL,
 *         hashValue       MessageDigest
 *     }
 * 
 */
public class DhSigStatic
    extends ASN1Object
{
    private final IssuerAndSerialNumber issuerAndSerial;
    private final ASN1OctetString hashValue;

    public DhSigStatic(byte[] hashValue)
    {
        this(null, hashValue);
    }

    public DhSigStatic(IssuerAndSerialNumber issuerAndSerial, byte[] hashValue)
    {
        this.issuerAndSerial = issuerAndSerial;
        this.hashValue = new DEROctetString(Arrays.clone(hashValue));
    }

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

        return null;
    }

    private DhSigStatic(ASN1Sequence seq)
    {
        if (seq.size() == 1)
        {
            issuerAndSerial = null;
            hashValue = ASN1OctetString.getInstance(seq.getObjectAt(0));
        }
        else if (seq.size() == 2)
        {
            issuerAndSerial = IssuerAndSerialNumber.getInstance(seq.getObjectAt(0));
            hashValue = ASN1OctetString.getInstance(seq.getObjectAt(1));
        }
        else
        {
            throw new IllegalArgumentException("sequence wrong length for DhSigStatic");
        }
    }

    public IssuerAndSerialNumber getIssuerAndSerial()
    {
        return issuerAndSerial;
    }

    public byte[] getHashValue()
    {
        return Arrays.clone(hashValue.getOctets());
    }

    public ASN1Primitive toASN1Primitive()
    {
        ASN1EncodableVector v = new ASN1EncodableVector(2);

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

        v.add(hashValue);

        return new DERSequence(v);
    }
}