Myujth

Enabled windows authentication in my application

the below is my handler code

public class BasicAuthenticationHandler : AuthenticationHandler<AuthenticationSchemeOptions>
 
 private readonly IUser _userService;
 public BasicAuthenticationHandler(IOptionsMonitor<AuthenticationSchemeOptions> options,
 ILoggerFactory logger,
 UrlEncoder encoder,
 ISystemClock clock,
 IUser UserService
 ) : base(options, logger, encoder, clock)
 
 _userService = UserService;
 
 protected override async Task<AuthenticateResult> HandleAuthenticateAsync()
 
 var a = Request.HttpContext.User.Identity.Name;

 User user = null;
 user = await _userService.IsAuthenicated(a, "");
 // Context.Response.StatusCode = StatusCodes.Status401Unauthorized;
 // Context.res = new RedirectToActionResult("Index", "Home", null);
 //Context.Response.StatusCode = StatusCodes.Status401Unauthorized;

 if (user == null)
 

 return AuthenticateResult.Fail("Invalid Username or Password");
 
 var claims = new 
 new Claim(ClaimTypes.NameIdentifier,user.UserName),
 new Claim(ClaimTypes.Name, user.UserName),
 ;

 var identity = new ClaimsIdentity(claims, Scheme.Name);
 var principal = new ClaimsPrincipal(identity);
 var ticket = new AuthenticationTicket(principal, Scheme.Name);


 return AuthenticateResult.Success(ticket);
 
 

autheticateresult.fail make a loop ask for windows credential and not redirect to custom error page.
while i tried with anomyouns its working fine.

autheticateresult.fail make a loop ask for windows credential and not
redirect to custom error page

When calling AuthenticateResult.Fail, it will make the Windows Authentication fail, and the IIS will check the authenticaiton for loop.

For a workaround, you could try UseStatusCodePages to rediect to error page,

 app.UseStatusCodePages(async context => 
 if (context.HttpContext.Response.StatusCode == 401)
 
 // your redirect
 context.HttpContext.Response.Redirect("/Home/Error");
 
 );
 app.UseAuthentication();

For another option, you could custom HandleChallengeAsync for BasicAuthenticationHandler.

public class BasicAuthenticationHandler : AuthenticationHandler<AuthenticationSchemeOptions>

 public BasicAuthenticationHandler(IOptionsMonitor<AuthenticationSchemeOptions> options,
 ILoggerFactory logger,
 UrlEncoder encoder,
 ISystemClock clock
 ) : base(options, logger, encoder, clock)
 
 
 protected override async Task<AuthenticateResult> HandleAuthenticateAsync()
 
 return AuthenticateResult.Fail("Invalid Username or Password");
 

 protected override Task HandleChallengeAsync(AuthenticationProperties properties)
 
 Context.Response.Redirect("/Home/Error");// redirect to your error page
 return Task.CompletedTask;