namespace Org.BouncyCastle.Asn1.Cms { public class EnvelopedData : Asn1Encodable { private DerInteger version; private OriginatorInfo originatorInfo; private Asn1Set recipientInfos; private EncryptedContentInfo encryptedContentInfo; private Asn1Set unprotectedAttrs; public DerInteger Version => version; public OriginatorInfo OriginatorInfo => originatorInfo; public Asn1Set RecipientInfos => recipientInfos; public EncryptedContentInfo EncryptedContentInfo => encryptedContentInfo; public Asn1Set UnprotectedAttrs => unprotectedAttrs; public static EnvelopedData GetInstance(object obj) { if (obj == null) return null; EnvelopedData envelopedData = obj as EnvelopedData; if (envelopedData != null) return envelopedData; return new EnvelopedData(Asn1Sequence.GetInstance(obj)); } public static EnvelopedData GetInstance(Asn1TaggedObject obj, bool explicitly) { return new EnvelopedData(Asn1Sequence.GetInstance(obj, explicitly)); } public EnvelopedData(OriginatorInfo originatorInfo, Asn1Set recipientInfos, EncryptedContentInfo encryptedContentInfo, Asn1Set unprotectedAttrs) { version = new DerInteger(CalculateVersion(originatorInfo, recipientInfos, unprotectedAttrs)); this.originatorInfo = originatorInfo; this.recipientInfos = recipientInfos; this.encryptedContentInfo = encryptedContentInfo; this.unprotectedAttrs = unprotectedAttrs; } public EnvelopedData(OriginatorInfo originatorInfo, Asn1Set recipientInfos, EncryptedContentInfo encryptedContentInfo, Attributes unprotectedAttrs) { version = new DerInteger(CalculateVersion(originatorInfo, recipientInfos, Asn1Set.GetInstance(unprotectedAttrs))); this.originatorInfo = originatorInfo; this.recipientInfos = recipientInfos; this.encryptedContentInfo = encryptedContentInfo; this.unprotectedAttrs = Asn1Set.GetInstance(unprotectedAttrs); } private EnvelopedData(Asn1Sequence seq) { int num = 0; version = (DerInteger)seq[num++]; object obj = seq[num++]; Asn1TaggedObject asn1TaggedObject = obj as Asn1TaggedObject; if (asn1TaggedObject != null) { originatorInfo = OriginatorInfo.GetInstance(asn1TaggedObject, false); obj = seq[num++]; } recipientInfos = Asn1Set.GetInstance(obj); encryptedContentInfo = EncryptedContentInfo.GetInstance(seq[num++]); if (seq.Count > num) unprotectedAttrs = Asn1Set.GetInstance((Asn1TaggedObject)seq[num], false); } public override Asn1Object ToAsn1Object() { Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector(version); asn1EncodableVector.AddOptionalTagged(false, 0, originatorInfo); asn1EncodableVector.Add(recipientInfos, encryptedContentInfo); asn1EncodableVector.AddOptionalTagged(false, 1, unprotectedAttrs); return new BerSequence(asn1EncodableVector); } public static int CalculateVersion(OriginatorInfo originatorInfo, Asn1Set recipientInfos, Asn1Set unprotectedAttrs) { if (originatorInfo != null || unprotectedAttrs != null) return 2; foreach (Asn1Encodable recipientInfo in recipientInfos) { if (!RecipientInfo.GetInstance(recipientInfo).Version.HasValue(0)) return 2; } return 0; } } }