// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
namespace Microsoft.AspNetCore.Server.HttpSys;
 
/// <summary>
/// Specifies protocols for authentication.
/// </summary>
[Flags]
public enum AuthenticationSchemes
{
    /// <summary>
    /// No authentication is enabled. This should only be used when HttpSysOptions.Authentication.AllowAnonymous is enabled (see <see cref="AuthenticationManager.AllowAnonymous"/>).
    /// </summary>
    None = 0x0,
 
    /// <summary>
    /// Specifies basic authentication.
    /// </summary>
    Basic = 0x1,
 
    // Digest = 0x2, // TODO: Verify this is no longer supported by Http.Sys
 
    /// <summary>
    /// Specifies NTLM authentication.
    /// </summary>
    NTLM = 0x4,
 
    /// <summary>
    /// Negotiates with the client to determine the authentication scheme. If both client and server support Kerberos, it is used;
    /// otherwise, NTLM is used.
    /// </summary>
    Negotiate = 0x8,
 
    /// <summary>
    /// Specifies Kerberos authentication.
    /// </summary>
    Kerberos = 0x10
}