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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) =>
Asn1Utilities.GetInstanceChoice(obj, isExplicit, GetInstance);
public static KeyAgreeRecipientIdentifier GetTagged(Asn1TaggedObject taggedObject, bool declaredExplicit) =>
Asn1Utilities.GetTaggedChoice(taggedObject, declaredExplicit, GetInstance);
private readonly IssuerAndSerialNumber m_issuerSerial;
private readonly RecipientKeyIdentifier m_rKeyID;
public KeyAgreeRecipientIdentifier(IssuerAndSerialNumber issuerSerial)
{
m_issuerSerial = issuerSerial ?? throw new ArgumentNullException(nameof(issuerSerial));
}
public KeyAgreeRecipientIdentifier(RecipientKeyIdentifier rKeyID)
{
m_rKeyID = rKeyID ?? throw new ArgumentNullException(nameof(rKeyID));
}
public IssuerAndSerialNumber IssuerAndSerialNumber => m_issuerSerial;
public RecipientKeyIdentifier RKeyID => m_rKeyID;
/**
* Produce an object suitable for an Asn1OutputStream.
* <pre>
* KeyAgreeRecipientIdentifier ::= CHOICE {
* issuerAndSerialNumber IssuerAndSerialNumber,
* rKeyId [0] IMPLICIT RecipientKeyIdentifier
* }
* </pre>
*/
public override Asn1Object ToAsn1Object()
{
if (m_issuerSerial != null)
return m_issuerSerial.ToAsn1Object();
return new DerTaggedObject(false, 0, m_rKeyID);
}
}
}
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