107 lines
2.2 KiB
C#
107 lines
2.2 KiB
C#
using System;
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namespace Org.BouncyCastle.Asn1.Cms
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{
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/**
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* <pre>
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* EnvelopedData ::= SEQUENCE {
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* version CMSVersion,
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* originatorInfo [0] IMPLICIT OriginatorInfo OPTIONAL,
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* recipientInfos RecipientInfos,
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* encryptedContentInfo EncryptedContentInfo,
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* unprotectedAttrs [1] IMPLICIT UnprotectedAttributes OPTIONAL
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* }
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* </pre>
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*/
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public class EnvelopedDataParser
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{
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private Asn1SequenceParser _seq;
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private DerInteger _version;
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private IAsn1Convertible _nextObject;
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private bool _originatorInfoCalled;
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public EnvelopedDataParser(
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Asn1SequenceParser seq)
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{
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this._seq = seq;
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this._version = (DerInteger)seq.ReadObject();
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}
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public DerInteger Version
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{
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get { return _version; }
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}
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public OriginatorInfo GetOriginatorInfo()
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{
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_originatorInfoCalled = true;
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if (_nextObject == null)
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{
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_nextObject = _seq.ReadObject();
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}
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if (_nextObject is Asn1TaggedObjectParser && ((Asn1TaggedObjectParser)_nextObject).TagNo == 0)
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{
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Asn1SequenceParser originatorInfo = (Asn1SequenceParser)
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((Asn1TaggedObjectParser)_nextObject).GetObjectParser(Asn1Tags.Sequence, false);
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_nextObject = null;
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return OriginatorInfo.GetInstance(originatorInfo.ToAsn1Object());
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}
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return null;
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}
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public Asn1SetParser GetRecipientInfos()
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{
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if (!_originatorInfoCalled)
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{
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GetOriginatorInfo();
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}
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if (_nextObject == null)
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{
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_nextObject = _seq.ReadObject();
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}
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Asn1SetParser recipientInfos = (Asn1SetParser)_nextObject;
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_nextObject = null;
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return recipientInfos;
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}
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public EncryptedContentInfoParser GetEncryptedContentInfo()
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{
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if (_nextObject == null)
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{
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_nextObject = _seq.ReadObject();
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}
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if (_nextObject != null)
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{
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Asn1SequenceParser o = (Asn1SequenceParser) _nextObject;
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_nextObject = null;
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return new EncryptedContentInfoParser(o);
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}
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return null;
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}
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public Asn1SetParser GetUnprotectedAttrs()
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{
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if (_nextObject == null)
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{
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_nextObject = _seq.ReadObject();
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}
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if (_nextObject != null)
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{
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IAsn1Convertible o = _nextObject;
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_nextObject = null;
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return (Asn1SetParser)((Asn1TaggedObjectParser)o).GetObjectParser(Asn1Tags.Set, false);
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}
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return null;
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}
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}
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}
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