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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;
/**
* <a href="http://tools.ietf.org/html/rfc5652#section-6.2.2">RFC 5652</a>:
* Content encryption key delivery mechanisms.
* <p>
* <pre>
* RecipientKeyIdentifier ::= SEQUENCE {
* subjectKeyIdentifier SubjectKeyIdentifier,
* date GeneralizedTime OPTIONAL,
* other OtherKeyAttribute OPTIONAL
* }
*
* SubjectKeyIdentifier ::= OCTET STRING
* </pre>
*/
public class RecipientKeyIdentifier
extends ASN1Object
{
private ASN1OctetString subjectKeyIdentifier;
private ASN1GeneralizedTime date;
private OtherKeyAttribute other;
public RecipientKeyIdentifier(
ASN1OctetString subjectKeyIdentifier,
ASN1GeneralizedTime date,
OtherKeyAttribute other)
{
this.subjectKeyIdentifier = subjectKeyIdentifier;
this.date = date;
this.other = other;
}
public RecipientKeyIdentifier(
byte[] subjectKeyIdentifier,
ASN1GeneralizedTime date,
OtherKeyAttribute other)
{
this.subjectKeyIdentifier = new DEROctetString(subjectKeyIdentifier);
this.date = date;
this.other = other;
}
public RecipientKeyIdentifier(
byte[] subjectKeyIdentifier)
{
this(subjectKeyIdentifier, null, null);
}
/**
* @deprecated use getInstance()
*/
public RecipientKeyIdentifier(
ASN1Sequence seq)
{
subjectKeyIdentifier = ASN1OctetString.getInstance(
seq.getObjectAt(0));
switch(seq.size())
{
case 1:
break;
case 2:
if (seq.getObjectAt(1) instanceof ASN1GeneralizedTime)
{
date = ASN1GeneralizedTime.getInstance(seq.getObjectAt(1));
}
else
{
other = OtherKeyAttribute.getInstance(seq.getObjectAt(2));
}
break;
case 3:
date = ASN1GeneralizedTime.getInstance(seq.getObjectAt(1));
other = OtherKeyAttribute.getInstance(seq.getObjectAt(2));
break;
default:
throw new IllegalArgumentException("Invalid RecipientKeyIdentifier");
}
}
/**
* Return a RecipientKeyIdentifier object from a tagged object.
*
* @param ato the tagged object holding the object we want.
* @param isExplicit 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 RecipientKeyIdentifier getInstance(ASN1TaggedObject ato, boolean isExplicit)
{
return getInstance(ASN1Sequence.getInstance(ato, isExplicit));
}
/**
* Return a RecipientKeyIdentifier object from the given object.
* <p>
* Accepted inputs:
* <ul>
* <li> null → null
* <li> {@link RecipientKeyIdentifier} object
* <li> {@link org.bouncycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats with RecipientKeyIdentifier structure inside
* </ul>
*
* @param obj the object we want converted.
* @exception IllegalArgumentException if the object cannot be converted.
*/
public static RecipientKeyIdentifier getInstance(Object obj)
{
if (obj instanceof RecipientKeyIdentifier)
{
return (RecipientKeyIdentifier)obj;
}
if(obj != null)
{
return new RecipientKeyIdentifier(ASN1Sequence.getInstance(obj));
}
return null;
}
public ASN1OctetString getSubjectKeyIdentifier()
{
return subjectKeyIdentifier;
}
public ASN1GeneralizedTime getDate()
{
return date;
}
public OtherKeyAttribute getOtherKeyAttribute()
{
return other;
}
/**
* Produce an object suitable for an ASN1OutputStream.
*/
public ASN1Primitive toASN1Primitive()
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(subjectKeyIdentifier);
if (date != null)
{
v.add(date);
}
if (other != null)
{
v.add(other);
}
return new DERSequence(v);
}
}
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