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using System;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1.Cms
{
public class KeyAgreeRecipientIdentifier
: Asn1Encodable, IAsn1Choice
{
public static KeyAgreeRecipientIdentifier GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is KeyAgreeRecipientIdentifier keyAgreeRecipientIdentifier)
return keyAgreeRecipientIdentifier;
if (obj is IssuerAndSerialNumber issuerAndSerialNumber)
return new KeyAgreeRecipientIdentifier(issuerAndSerialNumber);
if (obj is Asn1Sequence sequence)
return new KeyAgreeRecipientIdentifier(IssuerAndSerialNumber.GetInstance(sequence));
if (obj is Asn1TaggedObject taggedObject)
{
if (taggedObject.HasContextTag(0))
return new KeyAgreeRecipientIdentifier(RecipientKeyIdentifier.GetInstance(taggedObject, false));
}
throw new ArgumentException("Invalid KeyAgreeRecipientIdentifier: " + Platform.GetTypeName(obj), nameof(obj));
}
public static KeyAgreeRecipientIdentifier GetInstance(Asn1TaggedObject obj, bool isExplicit)
{
return Asn1Utilities.GetInstanceFromChoice(obj, isExplicit, GetInstance);
}
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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