using Org.BouncyCastle.Asn1.Oiw; using Org.BouncyCastle.Asn1.Pkcs; using System; namespace Org.BouncyCastle.Asn1.Smime { public class SmimeCapability : Asn1Encodable { public static readonly DerObjectIdentifier PreferSignedData = PkcsObjectIdentifiers.PreferSignedData; public static readonly DerObjectIdentifier CannotDecryptAny = PkcsObjectIdentifiers.CannotDecryptAny; public static readonly DerObjectIdentifier SmimeCapabilitiesVersions = PkcsObjectIdentifiers.SmimeCapabilitiesVersions; public static readonly DerObjectIdentifier DesCbc = OiwObjectIdentifiers.DesCbc; public static readonly DerObjectIdentifier DesEde3Cbc = PkcsObjectIdentifiers.DesEde3Cbc; public static readonly DerObjectIdentifier RC2Cbc = PkcsObjectIdentifiers.RC2Cbc; private DerObjectIdentifier capabilityID; private Asn1Object parameters; public DerObjectIdentifier CapabilityID => capabilityID; public Asn1Object Parameters => parameters; public SmimeCapability(Asn1Sequence seq) { capabilityID = (DerObjectIdentifier)seq[0].ToAsn1Object(); if (seq.Count > 1) parameters = seq[1].ToAsn1Object(); } public SmimeCapability(DerObjectIdentifier capabilityID, Asn1Encodable parameters) { if (capabilityID == null) throw new ArgumentNullException("capabilityID"); this.capabilityID = capabilityID; if (parameters != null) this.parameters = parameters.ToAsn1Object(); } public static SmimeCapability GetInstance(object obj) { if (obj == null || obj is SmimeCapability) return (SmimeCapability)obj; if (obj is Asn1Sequence) return new SmimeCapability((Asn1Sequence)obj); throw new ArgumentException("Invalid SmimeCapability"); } public override Asn1Object ToAsn1Object() { Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector(capabilityID); asn1EncodableVector.AddOptional(parameters); return new DerSequence(asn1EncodableVector); } } }