68 lines
1.6 KiB
C#
68 lines
1.6 KiB
C#
using System;
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using Org.BouncyCastle.Utilities;
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namespace Org.BouncyCastle.Asn1.Cms;
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public class ContentInfo : Asn1Encodable
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{
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private readonly DerObjectIdentifier contentType;
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private readonly Asn1Encodable content;
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public DerObjectIdentifier ContentType => contentType;
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public Asn1Encodable Content => content;
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public static ContentInfo GetInstance(object obj)
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{
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if (obj == null || obj is ContentInfo)
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{
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return (ContentInfo)obj;
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}
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if (obj is Asn1Sequence)
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{
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return new ContentInfo((Asn1Sequence)obj);
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}
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throw new ArgumentException("unknown object in factory: " + Platform.GetTypeName(obj));
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}
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public static ContentInfo GetInstance(Asn1TaggedObject obj, bool isExplicit)
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{
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return GetInstance(Asn1Sequence.GetInstance(obj, isExplicit));
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}
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private ContentInfo(Asn1Sequence seq)
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{
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if (seq.Count < 1 || seq.Count > 2)
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{
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throw new ArgumentException("Bad sequence size: " + seq.Count, "seq");
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}
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contentType = (DerObjectIdentifier)seq[0];
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if (seq.Count > 1)
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{
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Asn1TaggedObject asn1TaggedObject = (Asn1TaggedObject)seq[1];
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if (!asn1TaggedObject.IsExplicit() || asn1TaggedObject.TagNo != 0)
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{
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throw new ArgumentException("Bad tag for 'content'", "seq");
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}
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content = asn1TaggedObject.GetObject();
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}
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}
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public ContentInfo(DerObjectIdentifier contentType, Asn1Encodable content)
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{
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this.contentType = contentType;
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this.content = content;
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}
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public override Asn1Object ToAsn1Object()
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{
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Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector(contentType);
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if (content != null)
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{
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asn1EncodableVector.Add(new BerTaggedObject(0, content));
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}
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return new BerSequence(asn1EncodableVector);
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}
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}
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