77 lines
1.9 KiB
C#
77 lines
1.9 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 EncryptedData : Asn1Encodable
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{
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private readonly DerInteger version;
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private readonly EncryptedContentInfo encryptedContentInfo;
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private readonly Asn1Set unprotectedAttrs;
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public virtual DerInteger Version => version;
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public virtual EncryptedContentInfo EncryptedContentInfo => encryptedContentInfo;
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public virtual Asn1Set UnprotectedAttrs => unprotectedAttrs;
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public static EncryptedData GetInstance(object obj)
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{
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if (obj is EncryptedData)
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{
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return (EncryptedData)obj;
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}
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if (obj is Asn1Sequence)
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{
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return new EncryptedData((Asn1Sequence)obj);
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}
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throw new ArgumentException("Invalid EncryptedData: " + Platform.GetTypeName(obj));
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}
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public EncryptedData(EncryptedContentInfo encInfo)
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: this(encInfo, null)
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{
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}
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public EncryptedData(EncryptedContentInfo encInfo, Asn1Set unprotectedAttrs)
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{
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if (encInfo == null)
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{
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throw new ArgumentNullException("encInfo");
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}
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version = new DerInteger((unprotectedAttrs != null) ? 2 : 0);
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encryptedContentInfo = encInfo;
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this.unprotectedAttrs = unprotectedAttrs;
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}
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private EncryptedData(Asn1Sequence seq)
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{
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if (seq == null)
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{
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throw new ArgumentNullException("seq");
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}
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if (seq.Count < 2 || seq.Count > 3)
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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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version = DerInteger.GetInstance(seq[0]);
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encryptedContentInfo = EncryptedContentInfo.GetInstance(seq[1]);
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if (seq.Count > 2)
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{
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unprotectedAttrs = Asn1Set.GetInstance((Asn1TaggedObject)seq[2], explicitly: false);
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}
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}
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public override Asn1Object ToAsn1Object()
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{
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Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector(version, encryptedContentInfo);
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if (unprotectedAttrs != null)
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{
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asn1EncodableVector.Add(new BerTaggedObject(explicitly: false, 1, unprotectedAttrs));
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}
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return new BerSequence(asn1EncodableVector);
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}
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}
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