init commit

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

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+using System;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1.Cms;
+
+public class KekRecipientInfo : Asn1Encodable
+{
+	private DerInteger version;
+
+	private KekIdentifier kekID;
+
+	private AlgorithmIdentifier keyEncryptionAlgorithm;
+
+	private Asn1OctetString encryptedKey;
+
+	public DerInteger Version => version;
+
+	public KekIdentifier KekID => kekID;
+
+	public AlgorithmIdentifier KeyEncryptionAlgorithm => keyEncryptionAlgorithm;
+
+	public Asn1OctetString EncryptedKey => encryptedKey;
+
+	public KekRecipientInfo(KekIdentifier kekID, AlgorithmIdentifier keyEncryptionAlgorithm, Asn1OctetString encryptedKey)
+	{
+		version = new DerInteger(4);
+		this.kekID = kekID;
+		this.keyEncryptionAlgorithm = keyEncryptionAlgorithm;
+		this.encryptedKey = encryptedKey;
+	}
+
+	public KekRecipientInfo(Asn1Sequence seq)
+	{
+		version = (DerInteger)seq[0];
+		kekID = KekIdentifier.GetInstance(seq[1]);
+		keyEncryptionAlgorithm = AlgorithmIdentifier.GetInstance(seq[2]);
+		encryptedKey = (Asn1OctetString)seq[3];
+	}
+
+	public static KekRecipientInfo GetInstance(Asn1TaggedObject obj, bool explicitly)
+	{
+		return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
+	}
+
+	public static KekRecipientInfo GetInstance(object obj)
+	{
+		if (obj == null || obj is KekRecipientInfo)
+		{
+			return (KekRecipientInfo)obj;
+		}
+		if (obj is Asn1Sequence)
+		{
+			return new KekRecipientInfo((Asn1Sequence)obj);
+		}
+		throw new ArgumentException("Invalid KekRecipientInfo: " + Platform.GetTypeName(obj));
+	}
+
+	public override Asn1Object ToAsn1Object()
+	{
+		return new DerSequence(version, kekID, keyEncryptionAlgorithm, encryptedKey);
+	}
+}