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using System;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1.Cms
{
public class KeyAgreeRecipientIdentifier
: Asn1Encodable, IAsn1Choice
{
/**
* return an KeyAgreeRecipientIdentifier object from a tagged object.
*
* @param obj the tagged object holding the object we want.
* @param isExplicit true if the object is meant to be explicitly
* tagged false otherwise.
* @exception ArgumentException if the object held by the
* tagged object cannot be converted.
*/
public static KeyAgreeRecipientIdentifier GetInstance(
Asn1TaggedObject obj,
bool isExplicit)
{
return GetInstance(Asn1Sequence.GetInstance(obj, isExplicit));
}
/**
* return an KeyAgreeRecipientIdentifier object from the given object.
*
* @param obj the object we want converted.
* @exception ArgumentException if the object cannot be converted.
*/
public static KeyAgreeRecipientIdentifier GetInstance(
object obj)
{
if (obj == null || obj is KeyAgreeRecipientIdentifier)
return (KeyAgreeRecipientIdentifier)obj;
if (obj is Asn1Sequence)
return new KeyAgreeRecipientIdentifier(IssuerAndSerialNumber.GetInstance(obj));
if (obj is Asn1TaggedObject && ((Asn1TaggedObject)obj).TagNo == 0)
{
return new KeyAgreeRecipientIdentifier(RecipientKeyIdentifier.GetInstance(
(Asn1TaggedObject)obj, false));
}
throw new ArgumentException("Invalid KeyAgreeRecipientIdentifier: " + Platform.GetTypeName(obj), "obj");
}
private readonly IssuerAndSerialNumber issuerSerial;
private readonly RecipientKeyIdentifier rKeyID;
public KeyAgreeRecipientIdentifier(
IssuerAndSerialNumber issuerSerial)
{
this.issuerSerial = issuerSerial;
}
public KeyAgreeRecipientIdentifier(
RecipientKeyIdentifier rKeyID)
{
this.rKeyID = rKeyID;
}
public IssuerAndSerialNumber IssuerAndSerialNumber
{
get { return issuerSerial; }
}
public RecipientKeyIdentifier RKeyID
{
get { return rKeyID; }
}
/**
* Produce an object suitable for an Asn1OutputStream.
* <pre>
* KeyAgreeRecipientIdentifier ::= CHOICE {
* issuerAndSerialNumber IssuerAndSerialNumber,
* rKeyId [0] IMPLICIT RecipientKeyIdentifier
* }
* </pre>
*/
public override Asn1Object ToAsn1Object()
{
if (issuerSerial != null)
{
return issuerSerial.ToAsn1Object();
}
return new DerTaggedObject(false, 0, rKeyID);
}
}
}
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