using Org.BouncyCastle.Asn1.X509; namespace Org.BouncyCastle.Asn1.Cms { public class AuthenticatedDataParser { private Asn1SequenceParser seq; private DerInteger version; private IAsn1Convertible nextObject; private bool originatorInfoCalled; public DerInteger Version => version; public AuthenticatedDataParser(Asn1SequenceParser seq) { this.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 AlgorithmIdentifier GetMacAlgorithm() { if (nextObject == null) nextObject = seq.ReadObject(); if (nextObject != null) { Asn1SequenceParser obj = (Asn1SequenceParser)nextObject; nextObject = null; return AlgorithmIdentifier.GetInstance(obj.ToAsn1Object()); } return null; } public AlgorithmIdentifier GetDigestAlgorithm() { if (nextObject == null) nextObject = seq.ReadObject(); Asn1TaggedObjectParser asn1TaggedObjectParser = nextObject as Asn1TaggedObjectParser; if (asn1TaggedObjectParser != null && asn1TaggedObjectParser.HasContextTag(1)) { AlgorithmIdentifier tagged = AlgorithmIdentifier.GetTagged((Asn1TaggedObject)nextObject.ToAsn1Object(), false); nextObject = null; return tagged; } return null; } public ContentInfoParser GetEnapsulatedContentInfo() { if (nextObject == null) nextObject = seq.ReadObject(); if (nextObject != null) { Asn1SequenceParser obj = (Asn1SequenceParser)nextObject; nextObject = null; return new ContentInfoParser(obj); } return null; } public Asn1SetParser GetAuthAttrs() { if (nextObject == null) nextObject = seq.ReadObject(); Asn1TaggedObjectParser asn1TaggedObjectParser = nextObject as Asn1TaggedObjectParser; if (asn1TaggedObjectParser != null) { nextObject = null; return (Asn1SetParser)Asn1Utilities.ParseContextBaseUniversal(asn1TaggedObjectParser, 2, false, 17); } return null; } public Asn1OctetString GetMac() { if (nextObject == null) nextObject = seq.ReadObject(); IAsn1Convertible asn1Convertible = nextObject; nextObject = null; return Asn1OctetString.GetInstance(asn1Convertible.ToAsn1Object()); } public Asn1SetParser GetUnauthAttrs() { if (nextObject == null) nextObject = seq.ReadObject(); if (nextObject != null) { Asn1TaggedObject taggedObjectParser = (Asn1TaggedObject)nextObject; nextObject = null; return (Asn1SetParser)Asn1Utilities.ParseContextBaseUniversal(taggedObjectParser, 3, false, 17); } return null; } } }