ln.identities/AuthenticationChallenges.cs

using System;
using System.Collections.Generic;
namespace ln.identities
{
    public class AuthenticationChallenges
    {
        public AuthenticationChallenge[] Challenges => authenticationChallenges.ToArray();

        List<AuthenticationChallenge> authenticationChallenges = new List<AuthenticationChallenge>();

        private AuthenticationChallenges()
        {
        }

        public AuthenticationChallenges(IEnumerable<SecureAttribute> secureAttributes)
        {
            foreach (SecureAttribute secureAttribute in secureAttributes)
            {
                authenticationChallenges.Add(new AuthenticationChallenge(secureAttribute));
            }
        }
    }

    public class AuthenticationChallenge
    {
        public Guid SecureAttributeID { get; private set; }
        public String SecureAttributeTypeName { get; private set; }
        public string SecureAttributeLabel { get; private set; }
        public String AuthenticationParameters { get; private set; }
        public byte[] Challenge { get; private set; }

        public AuthenticationChallenge(SecureAttribute secureAttribute)
        {
            SecureAttributeID = secureAttribute.UniqueID;
            SecureAttributeTypeName = secureAttribute.GetAttributeTypeName();
            SecureAttributeLabel = secureAttribute.Label;
            AuthenticationParameters = secureAttribute.GetAuthenticationParameters();
            Challenge = secureAttribute.CreateChallenge();
        }
    }
}