using System; namespace Org.BouncyCastle.Asn1.Cms { public class KeyAgreeRecipientIdentifier : Asn1Encodable, IAsn1Choice { private readonly IssuerAndSerialNumber m_issuerSerial; private readonly RecipientKeyIdentifier m_rKeyID; public IssuerAndSerialNumber IssuerAndSerialNumber => m_issuerSerial; public RecipientKeyIdentifier RKeyID => m_rKeyID; public static KeyAgreeRecipientIdentifier GetInstance(object obj) { return Asn1Utilities.GetInstanceChoice(obj, GetOptional); } public static KeyAgreeRecipientIdentifier GetInstance(Asn1TaggedObject obj, bool isExplicit) { return Asn1Utilities.GetInstanceChoice(obj, isExplicit, GetInstance); } public static KeyAgreeRecipientIdentifier GetOptional(Asn1Encodable element) { if (element == null) throw new ArgumentNullException("element"); KeyAgreeRecipientIdentifier keyAgreeRecipientIdentifier = element as KeyAgreeRecipientIdentifier; if (keyAgreeRecipientIdentifier != null) return keyAgreeRecipientIdentifier; IssuerAndSerialNumber optional = IssuerAndSerialNumber.GetOptional(element); if (optional != null) return new KeyAgreeRecipientIdentifier(optional); Asn1TaggedObject optional2 = Asn1TaggedObject.GetOptional(element); if (optional2 != null && optional2.HasContextTag(0)) return new KeyAgreeRecipientIdentifier(RecipientKeyIdentifier.GetTagged(optional2, false)); return null; } public static KeyAgreeRecipientIdentifier GetTagged(Asn1TaggedObject taggedObject, bool declaredExplicit) { return Asn1Utilities.GetTaggedChoice(taggedObject, declaredExplicit, GetInstance); } public KeyAgreeRecipientIdentifier(IssuerAndSerialNumber issuerSerial) { if (issuerSerial == null) throw new ArgumentNullException("issuerSerial"); m_issuerSerial = issuerSerial; } public KeyAgreeRecipientIdentifier(RecipientKeyIdentifier rKeyID) { if (rKeyID == null) throw new ArgumentNullException("rKeyID"); m_rKeyID = rKeyID; } public override Asn1Object ToAsn1Object() { if (m_issuerSerial != null) return m_issuerSerial.ToAsn1Object(); return new DerTaggedObject(false, 0, m_rKeyID); } } }