EnvelopedDataParser
namespace Org.BouncyCastle.Asn1.Cms
{
public class EnvelopedDataParser
{
private Asn1SequenceParser _seq;
private DerInteger _version;
private IAsn1Convertible _nextObject;
private bool _originatorInfoCalled;
public DerInteger Version => _version;
public EnvelopedDataParser(Asn1SequenceParser seq)
{
_seq = seq;
_version = (DerInteger)seq.ReadObject();
}
public OriginatorInfo GetOriginatorInfo()
{
_originatorInfoCalled = true;
if (_nextObject == null)
_nextObject = _seq.ReadObject();
Asn1TaggedObjectParser asn1TaggedObjectParser = _nextObject as Asn1TaggedObjectParser;
if (asn1TaggedObjectParser != null && asn1TaggedObjectParser.HasContextTag(0)) {
Asn1SequenceParser obj = (Asn1SequenceParser)asn1TaggedObjectParser.ParseBaseUniversal(false, 16);
_nextObject = null;
return OriginatorInfo.GetInstance(obj.ToAsn1Object());
}
return null;
}
public Asn1SetParser GetRecipientInfos()
{
if (!_originatorInfoCalled)
GetOriginatorInfo();
if (_nextObject == null)
_nextObject = _seq.ReadObject();
Asn1SetParser result = (Asn1SetParser)_nextObject;
_nextObject = null;
return result;
}
public EncryptedContentInfoParser GetEncryptedContentInfo()
{
if (_nextObject == null)
_nextObject = _seq.ReadObject();
if (_nextObject != null) {
Asn1SequenceParser seq = (Asn1SequenceParser)_nextObject;
_nextObject = null;
return new EncryptedContentInfoParser(seq);
}
return null;
}
public Asn1SetParser GetUnprotectedAttrs()
{
if (_nextObject == null)
_nextObject = _seq.ReadObject();
if (_nextObject != null) {
Asn1TaggedObjectParser taggedObjectParser = (Asn1TaggedObjectParser)_nextObject;
_nextObject = null;
return (Asn1SetParser)Asn1Utilities.ParseContextBaseUniversal(taggedObjectParser, 1, false, 17);
}
return null;
}
}
}