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using System;
using Org.BouncyCastle.Asn1.X509;
namespace Org.BouncyCastle.Asn1.Esf
{
public class SignerAttribute
: Asn1Encodable
{
public static SignerAttribute GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is SignerAttribute signerAttribute)
return signerAttribute;
return new SignerAttribute(Asn1Sequence.GetInstance(obj), dummy: true);
}
private readonly Asn1Sequence m_claimedAttributes;
private readonly AttributeCertificate m_certifiedAttributes;
private SignerAttribute(Asn1Sequence seq, bool dummy)
{
Asn1TaggedObject taggedObject = Asn1TaggedObject.GetInstance(seq[0], Asn1Tags.ContextSpecific);
if (taggedObject.TagNo == 0)
{
m_claimedAttributes = Asn1Sequence.GetInstance(taggedObject, true);
}
else if (taggedObject.TagNo == 1)
{
m_certifiedAttributes = AttributeCertificate.GetInstance(taggedObject, true);
}
else
{
throw new ArgumentException("illegal tag.", nameof(seq));
}
}
public SignerAttribute(Asn1Sequence claimedAttributes)
{
m_claimedAttributes = claimedAttributes ?? throw new ArgumentNullException(nameof(claimedAttributes));
}
public SignerAttribute(AttributeCertificate certifiedAttributes)
{
m_certifiedAttributes = certifiedAttributes ?? throw new ArgumentNullException(nameof(certifiedAttributes));
}
public virtual Asn1Sequence ClaimedAttributes => m_claimedAttributes;
public virtual AttributeCertificate CertifiedAttributes => m_certifiedAttributes;
/**
*
* <pre>
* SignerAttribute ::= SEQUENCE OF CHOICE {
* claimedAttributes [0] ClaimedAttributes,
* certifiedAttributes [1] CertifiedAttributes }
*
* ClaimedAttributes ::= SEQUENCE OF Attribute
* CertifiedAttributes ::= AttributeCertificate -- as defined in RFC 3281: see clause 4.1.
* </pre>
*/
public override Asn1Object ToAsn1Object()
{
return m_claimedAttributes != null
? new DerSequence(new DerTaggedObject(0, m_claimedAttributes))
: new DerSequence(new DerTaggedObject(1, m_certifiedAttributes));
}
}
}
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