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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 JDK 1.5 to JDK 1.8 with debug enabled.

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package org.bouncycastle.asn1.x9;

import java.util.Enumeration;

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.ASN1TaggedObject;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERTaggedObject;

/**
 * ASN.1 def for Diffie-Hellman key exchange OtherInfo structure. See
 * RFC 2631, or X9.42, for further details.
 * 
 *  OtherInfo ::= SEQUENCE {
 *      keyInfo KeySpecificInfo,
 *      partyAInfo [0] OCTET STRING OPTIONAL,
 *      suppPubInfo [2] OCTET STRING
 *  }
 * 
*/ public class OtherInfo extends ASN1Object { 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; } /** * Return a OtherInfo object from the passed in object. * * @param obj an object for conversion or a byte[]. * @return a OtherInfo */ public static OtherInfo getInstance(Object obj) { if (obj instanceof OtherInfo) { return (OtherInfo)obj; } else if (obj != null) { return new OtherInfo(ASN1Sequence.getInstance(obj)); } return null; } private OtherInfo( ASN1Sequence seq) { Enumeration e = seq.getObjects(); keyInfo = KeySpecificInfo.getInstance(e.nextElement()); while (e.hasMoreElements()) { ASN1TaggedObject o = (ASN1TaggedObject)e.nextElement(); if (o.getTagNo() == 0) { partyAInfo = (ASN1OctetString)o.getObject(); } else if (o.getTagNo() == 2) { suppPubInfo = (ASN1OctetString)o.getObject(); } } } /** * Return the key specific info for the KEK/CEK. * * @return the key specific info. */ public KeySpecificInfo getKeyInfo() { return keyInfo; } /** * PartyA info for key deriviation. * * @return PartyA info. */ public ASN1OctetString getPartyAInfo() { return partyAInfo; } /** * The length of the KEK to be generated as a 4 byte big endian. * * @return KEK length as a 4 byte big endian in an octet string. */ public ASN1OctetString getSuppPubInfo() { return suppPubInfo; } /** * Return an ASN.1 primitive representation of this object. * * @return a DERSequence containing the OtherInfo values. */ public ASN1Primitive toASN1Primitive() { 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); } }




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