// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System.Net;
using System.Security.Principal;
 
namespace System.ServiceModel.Security
{
    public sealed class HttpDigestClientCredential
    {
        private NetworkCredential _digestCredentials;
        private bool _isReadOnly;
 
        internal HttpDigestClientCredential()
        {
            _digestCredentials = new NetworkCredential();
        }
 
        internal HttpDigestClientCredential(HttpDigestClientCredential other)
        {
            _digestCredentials = SecurityUtils.GetNetworkCredentialsCopy(other._digestCredentials);
            _isReadOnly = other._isReadOnly;
        }
 
        public NetworkCredential ClientCredential
        {
            get
            {
                return _digestCredentials;
            }
            set
            {
                ThrowIfImmutable();
                _digestCredentials = value;
            }
        }
 
        internal void MakeReadOnly()
        {
            _isReadOnly = true;
        }
 
        private void ThrowIfImmutable()
        {
            if (_isReadOnly)
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SRServiceModel.ObjectIsReadOnly));
            }
        }
    }
}