init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Asn1/Ess/ContentHints.cs

@@ -0,0 +1,65 @@
+using System;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1.Ess;
+
+public class ContentHints : Asn1Encodable
+{
+	private readonly DerUtf8String contentDescription;
+
+	private readonly DerObjectIdentifier contentType;
+
+	public DerObjectIdentifier ContentType => contentType;
+
+	public DerUtf8String ContentDescription => contentDescription;
+
+	public static ContentHints GetInstance(object o)
+	{
+		if (o == null || o is ContentHints)
+		{
+			return (ContentHints)o;
+		}
+		if (o is Asn1Sequence)
+		{
+			return new ContentHints((Asn1Sequence)o);
+		}
+		throw new ArgumentException("unknown object in 'ContentHints' factory : " + Platform.GetTypeName(o) + ".");
+	}
+
+	private ContentHints(Asn1Sequence seq)
+	{
+		IAsn1Convertible asn1Convertible = seq[0];
+		if (asn1Convertible.ToAsn1Object() is DerUtf8String)
+		{
+			contentDescription = DerUtf8String.GetInstance(asn1Convertible);
+			contentType = DerObjectIdentifier.GetInstance(seq[1]);
+		}
+		else
+		{
+			contentType = DerObjectIdentifier.GetInstance(seq[0]);
+		}
+	}
+
+	public ContentHints(DerObjectIdentifier contentType)
+	{
+		this.contentType = contentType;
+		contentDescription = null;
+	}
+
+	public ContentHints(DerObjectIdentifier contentType, DerUtf8String contentDescription)
+	{
+		this.contentType = contentType;
+		this.contentDescription = contentDescription;
+	}
+
+	public override Asn1Object ToAsn1Object()
+	{
+		Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector();
+		if (contentDescription != null)
+		{
+			asn1EncodableVector.Add(contentDescription);
+		}
+		asn1EncodableVector.Add(contentType);
+		return new DerSequence(asn1EncodableVector);
+	}
+}