using Org.BouncyCastle.Asn1.X509; using System; namespace Org.BouncyCastle.Asn1.Cms { public class EncryptedContentInfo : Asn1Encodable { private DerObjectIdentifier m_contentType; private AlgorithmIdentifier m_contentEncryptionAlgorithm; private Asn1OctetString m_encryptedContent; public DerObjectIdentifier ContentType => m_contentType; public AlgorithmIdentifier ContentEncryptionAlgorithm => m_contentEncryptionAlgorithm; public Asn1OctetString EncryptedContent => m_encryptedContent; public static EncryptedContentInfo GetInstance(object obj) { if (obj == null) return null; EncryptedContentInfo encryptedContentInfo = obj as EncryptedContentInfo; if (encryptedContentInfo != null) return encryptedContentInfo; return new EncryptedContentInfo(Asn1Sequence.GetInstance(obj)); } public static EncryptedContentInfo GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit) { return new EncryptedContentInfo(Asn1Sequence.GetInstance(taggedObject, declaredExplicit)); } public static EncryptedContentInfo GetTagged(Asn1TaggedObject taggedObject, bool declaredExplicit) { return new EncryptedContentInfo(Asn1Sequence.GetTagged(taggedObject, declaredExplicit)); } public EncryptedContentInfo(DerObjectIdentifier contentType, AlgorithmIdentifier contentEncryptionAlgorithm, Asn1OctetString encryptedContent) { if (contentType == null) throw new ArgumentNullException("contentType"); m_contentType = contentType; if (contentEncryptionAlgorithm == null) throw new ArgumentNullException("contentEncryptionAlgorithm"); m_contentEncryptionAlgorithm = contentEncryptionAlgorithm; m_encryptedContent = encryptedContent; } [Obsolete("Use 'GetInstance' instead")] public EncryptedContentInfo(Asn1Sequence seq) { int count = seq.Count; int sequencePosition = 0; if (count < 2 || count > 3) throw new ArgumentException("Bad sequence size: " + count.ToString(), "seq"); m_contentType = DerObjectIdentifier.GetInstance(seq[sequencePosition++]); m_contentEncryptionAlgorithm = AlgorithmIdentifier.GetInstance(seq[sequencePosition++]); m_encryptedContent = Asn1Utilities.ReadOptionalContextTagged(seq, ref sequencePosition, 0, false, Asn1OctetString.GetTagged); if (sequencePosition != count) throw new ArgumentException("Unexpected elements in sequence", "seq"); } public override Asn1Object ToAsn1Object() { Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector(3); asn1EncodableVector.Add(m_contentType, m_contentEncryptionAlgorithm); if (m_encryptedContent != null) asn1EncodableVector.Add(new BerTaggedObject(false, 0, m_encryptedContent)); return new BerSequence(asn1EncodableVector); } } }