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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.
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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