init commit

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

@@ -0,0 +1,113 @@
+using System;
+
+namespace Org.BouncyCastle.Asn1.Cms;
+
+public class EnvelopedData : Asn1Encodable
+{
+	private DerInteger version;
+
+	private OriginatorInfo originatorInfo;
+
+	private Asn1Set recipientInfos;
+
+	private EncryptedContentInfo encryptedContentInfo;
+
+	private Asn1Set unprotectedAttrs;
+
+	public DerInteger Version => version;
+
+	public OriginatorInfo OriginatorInfo => originatorInfo;
+
+	public Asn1Set RecipientInfos => recipientInfos;
+
+	public EncryptedContentInfo EncryptedContentInfo => encryptedContentInfo;
+
+	public Asn1Set UnprotectedAttrs => unprotectedAttrs;
+
+	public EnvelopedData(OriginatorInfo originatorInfo, Asn1Set recipientInfos, EncryptedContentInfo encryptedContentInfo, Asn1Set unprotectedAttrs)
+	{
+		version = new DerInteger(CalculateVersion(originatorInfo, recipientInfos, unprotectedAttrs));
+		this.originatorInfo = originatorInfo;
+		this.recipientInfos = recipientInfos;
+		this.encryptedContentInfo = encryptedContentInfo;
+		this.unprotectedAttrs = unprotectedAttrs;
+	}
+
+	public EnvelopedData(OriginatorInfo originatorInfo, Asn1Set recipientInfos, EncryptedContentInfo encryptedContentInfo, Attributes unprotectedAttrs)
+	{
+		version = new DerInteger(CalculateVersion(originatorInfo, recipientInfos, Asn1Set.GetInstance(unprotectedAttrs)));
+		this.originatorInfo = originatorInfo;
+		this.recipientInfos = recipientInfos;
+		this.encryptedContentInfo = encryptedContentInfo;
+		this.unprotectedAttrs = Asn1Set.GetInstance(unprotectedAttrs);
+	}
+
+	[Obsolete("Use 'GetInstance' instead")]
+	public EnvelopedData(Asn1Sequence seq)
+	{
+		int num = 0;
+		version = (DerInteger)seq[num++];
+		object obj = seq[num++];
+		if (obj is Asn1TaggedObject)
+		{
+			originatorInfo = OriginatorInfo.GetInstance((Asn1TaggedObject)obj, explicitly: false);
+			obj = seq[num++];
+		}
+		recipientInfos = Asn1Set.GetInstance(obj);
+		encryptedContentInfo = EncryptedContentInfo.GetInstance(seq[num++]);
+		if (seq.Count > num)
+		{
+			unprotectedAttrs = Asn1Set.GetInstance((Asn1TaggedObject)seq[num], explicitly: false);
+		}
+	}
+
+	public static EnvelopedData GetInstance(Asn1TaggedObject obj, bool explicitly)
+	{
+		return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
+	}
+
+	public static EnvelopedData GetInstance(object obj)
+	{
+		if (obj is EnvelopedData)
+		{
+			return (EnvelopedData)obj;
+		}
+		if (obj == null)
+		{
+			return null;
+		}
+		return new EnvelopedData(Asn1Sequence.GetInstance(obj));
+	}
+
+	public override Asn1Object ToAsn1Object()
+	{
+		Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector(version);
+		if (originatorInfo != null)
+		{
+			asn1EncodableVector.Add(new DerTaggedObject(explicitly: false, 0, originatorInfo));
+		}
+		asn1EncodableVector.Add(recipientInfos, encryptedContentInfo);
+		if (unprotectedAttrs != null)
+		{
+			asn1EncodableVector.Add(new DerTaggedObject(explicitly: false, 1, unprotectedAttrs));
+		}
+		return new BerSequence(asn1EncodableVector);
+	}
+
+	public static int CalculateVersion(OriginatorInfo originatorInfo, Asn1Set recipientInfos, Asn1Set unprotectedAttrs)
+	{
+		if (originatorInfo != null || unprotectedAttrs != null)
+		{
+			return 2;
+		}
+		foreach (object recipientInfo in recipientInfos)
+		{
+			RecipientInfo instance = RecipientInfo.GetInstance(recipientInfo);
+			if (instance.Version.Value.IntValue != 0)
+			{
+				return 2;
+			}
+		}
+		return 0;
+	}
+}