init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Asn1/Cms/SignerInfo.cs

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+using System;
+using System.Collections;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1.Cms;
+
+public class SignerInfo : Asn1Encodable
+{
+	private DerInteger version;
+
+	private SignerIdentifier sid;
+
+	private AlgorithmIdentifier digAlgorithm;
+
+	private Asn1Set authenticatedAttributes;
+
+	private AlgorithmIdentifier digEncryptionAlgorithm;
+
+	private Asn1OctetString encryptedDigest;
+
+	private Asn1Set unauthenticatedAttributes;
+
+	public DerInteger Version => version;
+
+	public SignerIdentifier SignerID => sid;
+
+	public Asn1Set AuthenticatedAttributes => authenticatedAttributes;
+
+	public AlgorithmIdentifier DigestAlgorithm => digAlgorithm;
+
+	public Asn1OctetString EncryptedDigest => encryptedDigest;
+
+	public AlgorithmIdentifier DigestEncryptionAlgorithm => digEncryptionAlgorithm;
+
+	public Asn1Set UnauthenticatedAttributes => unauthenticatedAttributes;
+
+	public static SignerInfo GetInstance(object obj)
+	{
+		if (obj == null || obj is SignerInfo)
+		{
+			return (SignerInfo)obj;
+		}
+		if (obj is Asn1Sequence)
+		{
+			return new SignerInfo((Asn1Sequence)obj);
+		}
+		throw new ArgumentException("Unknown object in factory: " + Platform.GetTypeName(obj), "obj");
+	}
+
+	public SignerInfo(SignerIdentifier sid, AlgorithmIdentifier digAlgorithm, Asn1Set authenticatedAttributes, AlgorithmIdentifier digEncryptionAlgorithm, Asn1OctetString encryptedDigest, Asn1Set unauthenticatedAttributes)
+	{
+		version = new DerInteger((!sid.IsTagged) ? 1 : 3);
+		this.sid = sid;
+		this.digAlgorithm = digAlgorithm;
+		this.authenticatedAttributes = authenticatedAttributes;
+		this.digEncryptionAlgorithm = digEncryptionAlgorithm;
+		this.encryptedDigest = encryptedDigest;
+		this.unauthenticatedAttributes = unauthenticatedAttributes;
+	}
+
+	public SignerInfo(SignerIdentifier sid, AlgorithmIdentifier digAlgorithm, Attributes authenticatedAttributes, AlgorithmIdentifier digEncryptionAlgorithm, Asn1OctetString encryptedDigest, Attributes unauthenticatedAttributes)
+	{
+		version = new DerInteger((!sid.IsTagged) ? 1 : 3);
+		this.sid = sid;
+		this.digAlgorithm = digAlgorithm;
+		this.authenticatedAttributes = Asn1Set.GetInstance(authenticatedAttributes);
+		this.digEncryptionAlgorithm = digEncryptionAlgorithm;
+		this.encryptedDigest = encryptedDigest;
+		this.unauthenticatedAttributes = Asn1Set.GetInstance(unauthenticatedAttributes);
+	}
+
+	[Obsolete("Use 'GetInstance' instead")]
+	public SignerInfo(Asn1Sequence seq)
+	{
+		IEnumerator enumerator = seq.GetEnumerator();
+		enumerator.MoveNext();
+		version = (DerInteger)enumerator.Current;
+		enumerator.MoveNext();
+		sid = SignerIdentifier.GetInstance(enumerator.Current);
+		enumerator.MoveNext();
+		digAlgorithm = AlgorithmIdentifier.GetInstance(enumerator.Current);
+		enumerator.MoveNext();
+		object current = enumerator.Current;
+		if (current is Asn1TaggedObject)
+		{
+			authenticatedAttributes = Asn1Set.GetInstance((Asn1TaggedObject)current, explicitly: false);
+			enumerator.MoveNext();
+			digEncryptionAlgorithm = AlgorithmIdentifier.GetInstance(enumerator.Current);
+		}
+		else
+		{
+			authenticatedAttributes = null;
+			digEncryptionAlgorithm = AlgorithmIdentifier.GetInstance(current);
+		}
+		enumerator.MoveNext();
+		encryptedDigest = Asn1OctetString.GetInstance(enumerator.Current);
+		if (enumerator.MoveNext())
+		{
+			unauthenticatedAttributes = Asn1Set.GetInstance((Asn1TaggedObject)enumerator.Current, explicitly: false);
+		}
+		else
+		{
+			unauthenticatedAttributes = null;
+		}
+	}
+
+	public override Asn1Object ToAsn1Object()
+	{
+		Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector(version, sid, digAlgorithm);
+		if (authenticatedAttributes != null)
+		{
+			asn1EncodableVector.Add(new DerTaggedObject(explicitly: false, 0, authenticatedAttributes));
+		}
+		asn1EncodableVector.Add(digEncryptionAlgorithm, encryptedDigest);
+		if (unauthenticatedAttributes != null)
+		{
+			asn1EncodableVector.Add(new DerTaggedObject(explicitly: false, 1, unauthenticatedAttributes));
+		}
+		return new DerSequence(asn1EncodableVector);
+	}
+}