using Org.BouncyCastle.Utilities; 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) { if (obj == null) return null; KeyAgreeRecipientIdentifier keyAgreeRecipientIdentifier = obj as KeyAgreeRecipientIdentifier; if (keyAgreeRecipientIdentifier != null) return keyAgreeRecipientIdentifier; IssuerAndSerialNumber issuerAndSerialNumber = obj as IssuerAndSerialNumber; if (issuerAndSerialNumber != null) return new KeyAgreeRecipientIdentifier(issuerAndSerialNumber); Asn1Sequence asn1Sequence = obj as Asn1Sequence; if (asn1Sequence != null) return new KeyAgreeRecipientIdentifier(IssuerAndSerialNumber.GetInstance(asn1Sequence)); Asn1TaggedObject asn1TaggedObject = obj as Asn1TaggedObject; if (asn1TaggedObject != null && asn1TaggedObject.HasContextTag(0)) return new KeyAgreeRecipientIdentifier(RecipientKeyIdentifier.GetInstance(asn1TaggedObject, false)); throw new ArgumentException("Invalid KeyAgreeRecipientIdentifier: " + Platform.GetTypeName(obj), "obj"); } public static KeyAgreeRecipientIdentifier GetInstance(Asn1TaggedObject obj, bool isExplicit) { return Asn1Utilities.GetInstanceChoice(obj, isExplicit, GetInstance); } 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); } } }