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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. Note: this package includes the NTRU encryption algorithms.

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package org.bouncycastle.asn1.cms;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1GeneralizedTime;
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.DEROctetString;
import org.bouncycastle.asn1.DERSequence;

/**
 * RFC 5652:
 * Content encryption key delivery mechanisms.
 * 

*

 * KEKIdentifier ::= SEQUENCE {
 *     keyIdentifier OCTET STRING,
 *     date GeneralizedTime OPTIONAL,
 *     other OtherKeyAttribute OPTIONAL 
 * }
 * 
*/ public class KEKIdentifier extends ASN1Object { private ASN1OctetString keyIdentifier; private ASN1GeneralizedTime date; private OtherKeyAttribute other; public KEKIdentifier( byte[] keyIdentifier, ASN1GeneralizedTime date, OtherKeyAttribute other) { this.keyIdentifier = new DEROctetString(keyIdentifier); this.date = date; this.other = other; } private KEKIdentifier( ASN1Sequence seq) { keyIdentifier = (ASN1OctetString)seq.getObjectAt(0); switch (seq.size()) { case 1: break; case 2: if (seq.getObjectAt(1) instanceof ASN1GeneralizedTime) { date = (ASN1GeneralizedTime)seq.getObjectAt(1); } else { other = OtherKeyAttribute.getInstance(seq.getObjectAt(1)); } break; case 3: date = (ASN1GeneralizedTime)seq.getObjectAt(1); other = OtherKeyAttribute.getInstance(seq.getObjectAt(2)); break; default: throw new IllegalArgumentException("Invalid KEKIdentifier"); } } /** * Return a KEKIdentifier object from a tagged object. * * @param obj the tagged object holding the object we want. * @param explicit true if the object is meant to be explicitly * tagged false otherwise. * @exception IllegalArgumentException if the object held by the * tagged object cannot be converted. */ public static KEKIdentifier getInstance( ASN1TaggedObject obj, boolean explicit) { return getInstance(ASN1Sequence.getInstance(obj, explicit)); } /** * Return a KEKIdentifier object from the given object. *

* Accepted inputs: *

    *
  • null → null *
  • {@link KEKIdentifier} object *
  • {@link org.bouncycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats with KEKIdentifier structure inside *
* * @param obj the object we want converted. * @exception IllegalArgumentException if the object cannot be converted. */ public static KEKIdentifier getInstance( Object obj) { if (obj == null || obj instanceof KEKIdentifier) { return (KEKIdentifier)obj; } if (obj instanceof ASN1Sequence) { return new KEKIdentifier((ASN1Sequence)obj); } throw new IllegalArgumentException("Invalid KEKIdentifier: " + obj.getClass().getName()); } public ASN1OctetString getKeyIdentifier() { return keyIdentifier; } public ASN1GeneralizedTime getDate() { return date; } public OtherKeyAttribute getOther() { return other; } /** * Produce an object suitable for an ASN1OutputStream. */ public ASN1Primitive toASN1Primitive() { ASN1EncodableVector v = new ASN1EncodableVector(); v.add(keyIdentifier); if (date != null) { v.add(date); } if (other != null) { v.add(other); } return new DERSequence(v); } }




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