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using System;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1.Cms
{
public class OriginatorIdentifierOrKey
: Asn1Encodable, IAsn1Choice
{
public static OriginatorIdentifierOrKey GetInstance(object o)
{
if (o == null)
return null;
if (o is OriginatorIdentifierOrKey originatorIdentifierOrKey)
return originatorIdentifierOrKey;
if (o is IssuerAndSerialNumber issuerAndSerialNumber)
return new OriginatorIdentifierOrKey(issuerAndSerialNumber);
if (o is Asn1Sequence sequence)
return new OriginatorIdentifierOrKey(IssuerAndSerialNumber.GetInstance(sequence));
if (o is Asn1TaggedObject taggedObject)
{
if (taggedObject.HasContextTag(0))
return new OriginatorIdentifierOrKey(SubjectKeyIdentifier.GetInstance(taggedObject, false));
if (taggedObject.HasContextTag(1))
return new OriginatorIdentifierOrKey(OriginatorPublicKey.GetInstance(taggedObject, false));
}
throw new ArgumentException("Invalid OriginatorIdentifierOrKey: " + Platform.GetTypeName(o), nameof(o));
}
public static OriginatorIdentifierOrKey GetInstance(Asn1TaggedObject o, bool explicitly)
{
return Asn1Utilities.GetInstanceFromChoice(o, explicitly, GetInstance);
}
private readonly Asn1Encodable m_id;
public OriginatorIdentifierOrKey(IssuerAndSerialNumber id)
{
m_id = id ?? throw new ArgumentNullException(nameof(id));
}
public OriginatorIdentifierOrKey(SubjectKeyIdentifier id)
{
m_id = new DerTaggedObject(false, 0, id);
}
public OriginatorIdentifierOrKey(OriginatorPublicKey id)
{
m_id = new DerTaggedObject(false, 1, id);
}
public Asn1Encodable ID => m_id;
public IssuerAndSerialNumber IssuerAndSerialNumber => m_id as IssuerAndSerialNumber;
public SubjectKeyIdentifier SubjectKeyIdentifier
{
get
{
if (m_id is Asn1TaggedObject taggedObject && taggedObject.HasContextTag(0))
return SubjectKeyIdentifier.GetInstance(taggedObject, false);
return null;
}
}
public OriginatorPublicKey OriginatorPublicKey
{
get
{
if (m_id is Asn1TaggedObject taggedObject && taggedObject.HasContextTag(1))
return OriginatorPublicKey.GetInstance(taggedObject, false);
return null;
}
}
/**
* Produce an object suitable for an Asn1OutputStream.
* <pre>
* OriginatorIdentifierOrKey ::= CHOICE {
* issuerAndSerialNumber IssuerAndSerialNumber,
* subjectKeyIdentifier [0] SubjectKeyIdentifier,
* originatorKey [1] OriginatorPublicKey
* }
*
* SubjectKeyIdentifier ::= OCTET STRING
* </pre>
*/
public override Asn1Object ToAsn1Object() => m_id.ToAsn1Object();
}
}
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