init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Asn1/Esf/SignerAttribute.cs

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+using System;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1.Esf;
+
+public class SignerAttribute : Asn1Encodable
+{
+	private Asn1Sequence claimedAttributes;
+
+	private AttributeCertificate certifiedAttributes;
+
+	public virtual Asn1Sequence ClaimedAttributes => claimedAttributes;
+
+	public virtual AttributeCertificate CertifiedAttributes => certifiedAttributes;
+
+	public static SignerAttribute GetInstance(object obj)
+	{
+		if (obj == null || obj is SignerAttribute)
+		{
+			return (SignerAttribute)obj;
+		}
+		if (obj is Asn1Sequence)
+		{
+			return new SignerAttribute(obj);
+		}
+		throw new ArgumentException("Unknown object in 'SignerAttribute' factory: " + Platform.GetTypeName(obj), "obj");
+	}
+
+	private SignerAttribute(object obj)
+	{
+		Asn1Sequence asn1Sequence = (Asn1Sequence)obj;
+		DerTaggedObject derTaggedObject = (DerTaggedObject)asn1Sequence[0];
+		if (derTaggedObject.TagNo == 0)
+		{
+			claimedAttributes = Asn1Sequence.GetInstance(derTaggedObject, explicitly: true);
+			return;
+		}
+		if (derTaggedObject.TagNo == 1)
+		{
+			certifiedAttributes = AttributeCertificate.GetInstance(derTaggedObject);
+			return;
+		}
+		throw new ArgumentException("illegal tag.", "obj");
+	}
+
+	public SignerAttribute(Asn1Sequence claimedAttributes)
+	{
+		this.claimedAttributes = claimedAttributes;
+	}
+
+	public SignerAttribute(AttributeCertificate certifiedAttributes)
+	{
+		this.certifiedAttributes = certifiedAttributes;
+	}
+
+	public override Asn1Object ToAsn1Object()
+	{
+		Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector();
+		if (claimedAttributes != null)
+		{
+			asn1EncodableVector.Add(new DerTaggedObject(0, claimedAttributes));
+		}
+		else
+		{
+			asn1EncodableVector.Add(new DerTaggedObject(1, certifiedAttributes));
+		}
+		return new DerSequence(asn1EncodableVector);
+	}
+}