package org.bouncycastle.asn1.x9;
import java.util.Enumeration;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DEREncodable;
import org.bouncycastle.asn1.DERObject;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERTaggedObject;
/**
* ANS.1 def for Diffie-Hellman key exchange OtherInfo structure. See
* RFC 2631, or X9.42, for further details.
*/
public class OtherInfo
implements DEREncodable
{
private KeySpecificInfo keyInfo;
private ASN1OctetString partyAInfo;
private ASN1OctetString suppPubInfo;
public OtherInfo(
KeySpecificInfo keyInfo,
ASN1OctetString partyAInfo,
ASN1OctetString suppPubInfo)
{
this.keyInfo = keyInfo;
this.partyAInfo = partyAInfo;
this.suppPubInfo = suppPubInfo;
}
public OtherInfo(
ASN1Sequence seq)
{
Enumeration e = seq.getObjects();
keyInfo = new KeySpecificInfo((ASN1Sequence)e.nextElement());
while (e.hasMoreElements())
{
DERTaggedObject o = (DERTaggedObject)e.nextElement();
if (o.getTagNo() == 0)
{
partyAInfo = (ASN1OctetString)o.getObject();
}
else if (o.getTagNo() == 2)
{
suppPubInfo = (ASN1OctetString)o.getObject();
}
}
}
public KeySpecificInfo getKeyInfo()
{
return keyInfo;
}
public ASN1OctetString getPartyAInfo()
{
return partyAInfo;
}
public ASN1OctetString getSuppPubInfo()
{
return suppPubInfo;
}
/**
* Produce an object suitable for an ASN1OutputStream.
* <pre>
* OtherInfo ::= SEQUENCE {
* keyInfo KeySpecificInfo,
* partyAInfo [0] OCTET STRING OPTIONAL,
* suppPubInfo [2] OCTET STRING
* }
* </pre>
*/
public DERObject getDERObject()
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(keyInfo);
if (partyAInfo != null)
{
v.add(new DERTaggedObject(0, partyAInfo));
}
v.add(new DERTaggedObject(2, suppPubInfo));
return new DERSequence(v);
}
}