using Org.BouncyCastle.Asn1.X509; using Org.BouncyCastle.Utilities; using System; namespace Org.BouncyCastle.Asn1.Pkcs { public class EncryptedData : Asn1Encodable { private readonly Asn1Sequence data; public DerObjectIdentifier ContentType => (DerObjectIdentifier)data[0]; public AlgorithmIdentifier EncryptionAlgorithm => AlgorithmIdentifier.GetInstance(data[1]); public Asn1OctetString Content { get { if (data.Count == 3) return Asn1OctetString.GetInstance((Asn1TaggedObject)data[2], false); return null; } } public static EncryptedData GetInstance(object obj) { if (obj is EncryptedData) return (EncryptedData)obj; if (obj is Asn1Sequence) return new EncryptedData((Asn1Sequence)obj); throw new ArgumentException("Unknown object in factory: " + Platform.GetTypeName(obj), "obj"); } private EncryptedData(Asn1Sequence seq) { if (seq.Count != 2) throw new ArgumentException("Wrong number of elements in sequence", "seq"); if (!((DerInteger)seq[0]).HasValue(0)) throw new ArgumentException("sequence not version 0"); data = (Asn1Sequence)seq[1]; } public EncryptedData(DerObjectIdentifier contentType, AlgorithmIdentifier encryptionAlgorithm, Asn1Encodable content) { data = new BerSequence(contentType, encryptionAlgorithm.ToAsn1Object(), new BerTaggedObject(false, 0, content)); } public override Asn1Object ToAsn1Object() { return new BerSequence(new DerInteger(0), data); } } }