ClearTextChannel.cs

using System;
using OSDP.Net.Messages.SecureChannel;
 
namespace OSDP.Net.LineQuality
{
    internal sealed class ClearTextChannel : MessageSecureChannel
    {
        private const string NotSecuredMessage =
            "Line quality test traffic is never secured; this channel has no cryptographic state.";

        public static readonly ClearTextChannel Instance = new();
 
        private ClearTextChannel()
        {
        }
 
        public override byte[] DecodePayload(byte[] payload) => throw new NotSupportedException(NotSecuredMessage);
 
        public override void EncodePayload(byte[] payload, Span<byte> destination) =>
            throw new NotSupportedException(NotSecuredMessage);
 
        public override ReadOnlySpan<byte> GenerateMac(ReadOnlySpan<byte> message, bool isIncoming) =>
            throw new NotSupportedException(NotSecuredMessage);
    }
}