ContentInfo
using System;
namespace Org.BouncyCastle.Asn1.Cms
{
public class ContentInfo : Asn1Encodable
{
private readonly DerObjectIdentifier contentType;
private readonly Asn1Encodable content;
public DerObjectIdentifier ContentType => contentType;
public Asn1Encodable Content => content;
public static ContentInfo GetInstance(object obj)
{
if (obj == null)
return null;
ContentInfo contentInfo = obj as ContentInfo;
if (contentInfo != null)
return contentInfo;
return new ContentInfo(Asn1Sequence.GetInstance(obj));
}
public static ContentInfo GetInstance(Asn1TaggedObject obj, bool isExplicit)
{
return new ContentInfo(Asn1Sequence.GetInstance(obj, isExplicit));
}
private ContentInfo(Asn1Sequence seq)
{
if (seq.Count < 1 || seq.Count > 2)
throw new ArgumentException("Bad sequence size: " + seq.Count.ToString(), "seq");
contentType = (DerObjectIdentifier)seq[0];
if (seq.Count > 1) {
Asn1TaggedObject instance = Asn1TaggedObject.GetInstance(seq[1], 128);
if (!instance.IsExplicit() || instance.TagNo != 0)
throw new ArgumentException("Bad tag for 'content'", "seq");
content = instance.GetExplicitBaseObject();
}
}
public ContentInfo(DerObjectIdentifier contentType, Asn1Encodable content)
{
this.contentType = contentType;
this.content = content;
}
public override Asn1Object ToAsn1Object()
{
Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector(contentType);
if (content != null)
asn1EncodableVector.Add(new BerTaggedObject(0, content));
return new BerSequence(asn1EncodableVector);
}
}
}