crypto/src/asn1/crmf/Controls.cs


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using System;

namespace Org.BouncyCastle.Asn1.Crmf
{
    public class Controls
        : Asn1Encodable
    {
        public static Controls GetInstance(object obj)
        {
            if (obj == null)
                return null;
            if (obj is Controls controls)
                return controls;
            return new Controls(Asn1Sequence.GetInstance(obj));
        }

        public static Controls GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
        {
            return new Controls(Asn1Sequence.GetInstance(taggedObject, declaredExplicit));
        }

        public static Controls GetOptional(Asn1Encodable element)
        {
            if (element == null)
                throw new ArgumentNullException(nameof(element));
            if (element is Controls controls)
                return controls;
            Asn1Sequence asn1Sequence = Asn1Sequence.GetOptional(element);
            if (asn1Sequence != null)
                return new Controls(asn1Sequence);
            return null;
        }

        private readonly Asn1Sequence m_content;

        private Controls(Asn1Sequence seq)
        {
            m_content = seq;
        }

        public Controls(params AttributeTypeAndValue[] atvs)
        {
            m_content = new DerSequence(atvs);
        }

        public virtual AttributeTypeAndValue[] ToAttributeTypeAndValueArray() =>
            m_content.MapElements(AttributeTypeAndValue.GetInstance);

        /**
         * <pre>
         * Controls  ::= SEQUENCE SIZE(1..MAX) OF AttributeTypeAndValue
         * </pre>
         * @return a basic ASN.1 object representation.
         */
        public override Asn1Object ToAsn1Object() => m_content;
    }
}