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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.
package org.bouncycastle.asn1.cms;
import org.bouncycastle.asn1.ASN1Choice;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERTaggedObject;
/**
* RFC 5652:
* Content encryption key delivery mechanisms.
*
* RecipientIdentifier ::= CHOICE {
* issuerAndSerialNumber IssuerAndSerialNumber,
* subjectKeyIdentifier [0] SubjectKeyIdentifier
* }
*
* SubjectKeyIdentifier ::= OCTET STRING
*
*/
public class RecipientIdentifier
extends ASN1Object
implements ASN1Choice
{
private ASN1Encodable id;
public RecipientIdentifier(
IssuerAndSerialNumber id)
{
this.id = id;
}
public RecipientIdentifier(
ASN1OctetString id)
{
this.id = new DERTaggedObject(false, 0, id);
}
public RecipientIdentifier(
ASN1Primitive id)
{
this.id = id;
}
/**
* Return a RecipientIdentifier object from the given object.
*
* Accepted inputs:
*
* - null → null
*
- {@link RecipientIdentifier} object
*
- {@link IssuerAndSerialNumber} object
*
- {@link org.bouncycastle.asn1.ASN1OctetString#getInstance(java.lang.Object) ASN1OctetString} input formats (OctetString, byte[]) with value of KeyIdentifier in DER form
*
- {@link org.bouncycastle.asn1.ASN1Primitive ASN1Primitive} for RecipientIdentifier constructor
*
*
* @param o the object we want converted.
* @exception IllegalArgumentException if the object cannot be converted.
*/
public static RecipientIdentifier getInstance(
Object o)
{
if (o == null || o instanceof RecipientIdentifier)
{
return (RecipientIdentifier)o;
}
if (o instanceof IssuerAndSerialNumber)
{
return new RecipientIdentifier((IssuerAndSerialNumber)o);
}
if (o instanceof ASN1OctetString)
{
return new RecipientIdentifier((ASN1OctetString)o);
}
if (o instanceof ASN1Primitive)
{
return new RecipientIdentifier((ASN1Primitive)o);
}
throw new IllegalArgumentException(
"Illegal object in RecipientIdentifier: " + o.getClass().getName());
}
public boolean isTagged()
{
return (id instanceof ASN1TaggedObject);
}
public ASN1Encodable getId()
{
if (id instanceof ASN1TaggedObject)
{
return ASN1OctetString.getInstance((ASN1TaggedObject)id, false);
}
return IssuerAndSerialNumber.getInstance(id);
}
/**
* Produce an object suitable for an ASN1OutputStream.
*/
public ASN1Primitive toASN1Primitive()
{
return id.toASN1Primitive();
}
}
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