82 lines
1.8 KiB
C#
82 lines
1.8 KiB
C#
namespace Org.BouncyCastle.Asn1.Cms;
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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 DerInteger Version => _version;
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public EnvelopedDataParser(Asn1SequenceParser seq)
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{
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_seq = seq;
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_version = (DerInteger)seq.ReadObject();
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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 asn1SequenceParser = (Asn1SequenceParser)((Asn1TaggedObjectParser)_nextObject).GetObjectParser(16, isExplicit: false);
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_nextObject = null;
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return OriginatorInfo.GetInstance(asn1SequenceParser.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 result = (Asn1SetParser)_nextObject;
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_nextObject = null;
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return result;
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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 seq = (Asn1SequenceParser)_nextObject;
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_nextObject = null;
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return new EncryptedContentInfoParser(seq);
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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 nextObject = _nextObject;
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_nextObject = null;
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return (Asn1SetParser)((Asn1TaggedObjectParser)nextObject).GetObjectParser(17, isExplicit: false);
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}
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return null;
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}
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}
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