org.bouncycastle.asn1.crmf.DhSigStatic Maven / Gradle / Ivy
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);
}
}