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  <system.webServer>
    <security>
      <authentication>
        <anonymousAuthentication enabled="true" />
        <windowsAuthentication enabled="true" />
      </authentication>
    </security>
  </system.webServer>

{
  "iisSettings": {
    "windowsAuthentication": true,
    "anonymousAuthentication": true,
    "iisExpress": {
      "applicationUrl": "http://localhost:3381/",
      "sslPort": 0
    }
  }
}

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <system.webServer>
    <handlers>
      <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModule" resourceType="Unspecified"/>
    </handlers>
    <aspNetCore processPath="%LAUNCHER_PATH%" arguments="%LAUNCHER_ARGS%" 
            stdoutLogEnabled="false" stdoutLogFile=".\logs\stdout" 
            forwardWindowsAuthToken="true"/>
  </system.webServer>
</configuration>

namespace ASPNETCore2WindowsAuthentication
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var host = new WebHostBuilder()
                                     .UseKestrel()
                                     .UseContentRoot(Directory.GetCurrentDirectory())
                                     .UseStartup<Startup>()
                                     .UseHttpSys(options => // Just for local tests without IIS, Or self-hosted scenarios on Windows ...
                                     {
                                         options.Authentication.Schemes =
                                              AuthenticationSchemes.Negotiate | AuthenticationSchemes.NTLM;
                                         options.Authentication.AllowAnonymous = true;
                                         //options.UrlPrefixes.Add("http://+:80/");
                                     })
                                     .Build();
            host.Run();
        }
    }
}

namespace ASPNETCore2WindowsAuthentication
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var host = new WebHostBuilder()
                                     .UseKestrel()
                                     .UseContentRoot(Directory.GetCurrentDirectory())
                                     .UseIISIntegration()
                                     .UseDefaultServiceProvider((context, options) =>
                                     {
                                         options.ValidateScopes = context.HostingEnvironment.IsDevelopment();
                                     })
                                     .UseStartup<Startup>()
                                     .Build();
            host.Run();
        }
    }
}

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc();

            services.Configure<IISOptions>(options =>
            {
                // Sets the HttpContext.User
                // Note: Windows Authentication must also be enabled in IIS for this to work.
                options.AutomaticAuthentication = true;
                options.ForwardClientCertificate = true;
            });
            
            services.AddAuthentication(options =>
            {
                // for both windows and anonymous authentication
                options.DefaultChallengeScheme = IISDefaults.AuthenticationScheme;
            });
        }

        private string authInfo()
        {
            var claims = new StringBuilder();
            if (User.Identity is ClaimsIdentity claimsIdentity)
            {
                claims.Append("Your claims: \n");
                foreach (var claim in claimsIdentity.Claims)
                {
                    claims.Append(claim.Type + ", ");
                    claims.Append(claim.Value + "\n");
                }
            }

            return $"IsAuthenticated: {User.Identity.IsAuthenticated}; Identity.Name: {User.Identity.Name}; WindowsPrincipal: {(User is WindowsPrincipal)}\n{claims}";
        }

namespace ASPNETCore2WindowsAuthentication.Controllers
{
    public class HomeController : Controller
    {
        public IActionResult Index()
        {
            return View();
        }

        [Authorize]
        public IActionResult Windows()
        {
            return Content(authInfo());
        }

        private string authInfo()
        {
            var claims = new StringBuilder();
            if (User.Identity is ClaimsIdentity claimsIdentity)
            {
                claims.Append("Your claims: \n");
                foreach (var claim in claimsIdentity.Claims)
                {
                    claims.Append(claim.Type + ", ");
                    claims.Append(claim.Value + "\n");
                }
            }

            return $"IsAuthenticated: {User.Identity.IsAuthenticated}; Identity.Name: {User.Identity.Name}; WindowsPrincipal: {(User is WindowsPrincipal)}\n{claims}";
        }

        [AllowAnonymous]
        public IActionResult Anonymous()
        {
            return Content(authInfo());
        }

        [Authorize(Roles = "Domain Admins")]
        public IActionResult ForAdmins()
        {
            return Content(authInfo());
        }

        [Authorize(Roles = "Domain Users")]
        public IActionResult ForUsers()
        {
            return Content(authInfo());
        }
    }
}

 dotnet publish

[Authorize(Roles = @"<domain>\<group>")]
//or
[Authorize(Roles = @"<domain>\<group1>,<domain>\<group2>")]

services.AddAuthorization(options =>
{
   options.AddPolicy("RequireWindowsGroupMembership", policy =>
   {
     policy.RequireAuthenticatedUser();
     policy.RequireRole(@"<domain>\<group>"));  
   }
});

 [Authorize(Policy = "RequireWindowsGroupMembership")]

[HttpGet("[action]")]
public IActionResult SomeValue()
{
    if (!User.IsInRole(@"Domain\Group")) return StatusCode(403);
    return Ok("Some Value");
}

    public class ApplicationClaimsTransformation : IClaimsTransformation
    {
        private readonly ILogger<ApplicationClaimsTransformation> _logger;

        public ApplicationClaimsTransformation(ILogger<ApplicationClaimsTransformation> logger)
        {
            _logger = logger;
        }

        public Task<ClaimsPrincipal> TransformAsync(ClaimsPrincipal principal)
        {
            if (!(principal.Identity is ClaimsIdentity identity))
            {
                return Task.FromResult(principal);
            }

            var claims = addExistingUserClaims(identity);
            identity.AddClaims(claims);

            return Task.FromResult(principal);
        }

        private IEnumerable<Claim> addExistingUserClaims(IIdentity identity)
        {
            var claims = new List<Claim>();
            var user = @"VahidPC\Vahid";
            if (identity.Name != user)
            {
                _logger.LogError($"Couldn't find {identity.Name}.");
                return claims;
            }

            claims.Add(new Claim(ClaimTypes.GivenName, user));
            return claims;
        }
    }

            services.AddScoped<IClaimsTransformation, ApplicationClaimsTransformation>();
            services.AddAuthentication(options =>
            {
                // for both windows and anonymous authentication
                options.DefaultChallengeScheme = IISDefaults.AuthenticationScheme;
            });

var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
var userName = User.FindFirstValue(ClaimTypes.Name);
var userName = User.FindFirstValue(ClaimTypes.GivenName);