using Org.BouncyCastle.Utilities; using System; 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(2); asn1EncodableVector.AddOptional(contentDescription); asn1EncodableVector.Add(contentType); return new DerSequence(asn1EncodableVector); } } }