Develop Reference

Blazor server authentication JWT for SignalR everything but web applications

I hope someone could clear up a couple of concepts for me.
I use WinForms and Blazor Server and I desire to send a message to a user.
For that purpose, I've decided to try JWT authentication.
I would also prefer the Blazor server have this JWT authentication built in as per documentation
Blazor server:
var builder = WebApplication.CreateBuilder(args);
var services = builder.Services;
// Add services to the container.
services.AddCors(option => option.AddPolicy("CorsPolicy", p => p.AllowAnyHeader().AllowAnyOrigin().AllowAnyMethod().AllowCredentials()));
//services.AddScoped<AuthenticationStateProvider, MyAuthenticationStateProvider>();
services.AddAuthentication(options =>
{
options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
}).AddJwtBearer(options =>
{
options.TokenValidationParameters = new TokenValidationParameters() //Guessing this section is for security of the token - ensures that I'm the one that made it and such.
{
ValidateAudience = false,
ValidateIssuer = false,
ValidateLifetime = false,
IssuerSigningKey = new SymmetricSecurityKey(
Encoding.UTF8.GetBytes("test")),
ValidIssuer = "test",
ValidAudience = "test"
};
options.Events = new()
{
OnMessageReceived = (context) =>
{
var path = context.HttpContext.Request.Path;
if (path.StartsWithSegments("/hubs")) // || path.StartsWithSegments("/token")
{
var accessToken = string.IsNullOrWhiteSpace(context.Request.Query["access_token"]) ? context.Request.Headers["Authorization"] : context.Request.Query["access_token"];
if (!string.IsNullOrWhiteSpace(accessToken))
{
//Real
context.Token = accessToken; //another guess - this is adding the accesstoken to the httpContext so it can be used somewhere else probably.
//Test attach claims to context. I want to be able to do this somewhere else though.
var claims = new Claim[]
{
new(ClaimTypes.Name, "myUserName"),
};
var identity = new ClaimsIdentity(claims);
context.Principal = new(identity);
context.Success();
}
}
return Task.CompletedTask;
},
OnAuthenticationFailed = (context) =>
{
Debug.WriteLine("OnAuthenticationFailed: " + context.Exception.Message);
return Task.CompletedTask;
}
};
});
services.AddRazorPages();
services.AddServerSideBlazor();
services.AddSignalR()
.AddHubOptions<ChatHub>(options => options.EnableDetailedErrors = true);
var app = builder.Build();
// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
app.UseExceptionHandler("/Error");
// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
app.UseHsts();
}
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.MapBlazorHub();
app.MapHub<ChatHub>("/hubs/chathub");
app.MapFallbackToPage("/_Host");
Hub:
[Authorize(AuthenticationSchemes = JwtBearerDefaults.AuthenticationScheme)] //Same as: [Authorize(AuthenticationSchemes = "Bearer")]
public class ChatHub : Hub
{
public Task SendMessageAsync(string user, string message)
{
Debug.WriteLine(Context.UserIdentifier); //null
bool test1 = Context.User.Identity.IsAuthenticated; //false
string test2 = Context?.User?.Identity?.Name; //myUserName
return Clients.User(Context?.User?.Identity?.Name).SendAsync("ReceiveMessage", user, message); //This does then not work ofc.
}
}
Client:
HubConnection connection;
string url = "https://localhost:7041/hubs/chathub";
string token = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c";
public Form1()
{
InitializeComponent();
connection = new HubConnectionBuilder()
.WithUrl(url, options =>
{
options.AccessTokenProvider = () => Task.FromResult(token);
})
.WithAutomaticReconnect()
.Build();
}
private async void HubConnectBtn_Click(object sender, EventArgs e)
{
connection.On<string, string>("ReceiveMessage", (user, message) =>
{
this.Invoke(() =>
{
var newMessage = $"{user}: {message}";
MessagesLB.Items.Add(newMessage);
});
});
try
{
await connection.StartAsync();
MessagesLB.Items.Add("Connected!");
}
catch(Exception ex)
{
MessagesLB.Items.Add(ex.Message);
}
}
What I do not understand:
When connecting the Client, how do I pass username and password from the winform to the Blazor server, and how to I get access to the middleware authentication and return a JTW back to the client connection. Do I need to make an API on the Blazor Server, do a call and generate a JWT which I pass here: options.AccessTokenProvider = () => Task.FromResult(token); or is there a more logical way?
I've looked into the AuthenticationStateProvider, but couldn't produce the results I wanted.
Is JWT authentication even intended for this, or is there a better alternative?
I'm using an already existing database filled with users that I'm going to access when this server is looking up if the username and password is correct. Meaning I want a "userService" or something like that which contains all users. For now it's fine to mock users, but I need to know where I can do this and swap it out with a DBconnection/context later on.
Any help would be most appreciated!
EDIT:
After some time I found a approach that did work as I wanted it. By using a custom Authentication scheme I could add a token containing user data from and to user/group which means I have complete control over the communication flow. A great benefit of this is that you never need to have a user database to check the authenticity of the user it self, I solved this by having baked into the token a salt/token value that only me and whom ever other person would integrate with the signalR relay server knows about. The Token then contains licensenumber, department no, user info etc to make it unique when registering.
SERVER SIDE:
public class MyAuthenticationHandler : AuthenticationHandler<MyCustomAuthenticationSchemeOptions>
{
public MyAuthenticationHandler(IOptionsMonitor<MyCustomAuthenticationSchemeOptions> options,
ILoggerFactory logger,
UrlEncoder encoder,
ISystemClock clock) : base(options, logger, encoder, clock)
{
}
protected override Task<AuthenticateResult> HandleAuthenticateAsync()
{
TokenModel tokenModel;
if (!Request.Headers.ContainsKey(HeaderNames.Authorization))
{
return Task.FromResult(AuthenticateResult.Fail("Header Not Found."));
}
AuthenticationHeaderValue auth;
if (!AuthenticationHeaderValue.TryParse(Request.Headers.Authorization, out auth))
{
return Task.FromResult(AuthenticateResult.Fail("No authentication header"));
}
if (!auth.Scheme.Equals("Bearer"))
{
return Task.FromResult(AuthenticateResult.Fail("Authentication Scheme was not Bearer"));
}
//var header = Request.Headers[HeaderNames.Authorization].ToString();
//var tokenMatch = Regex.Match(header, MyAuthenticationSchemeConstants.MyToken);
if (!string.IsNullOrWhiteSpace(auth.Parameter))
{
//string[] token = header.Split(" ");
try
{
string parsedToken = Encoding.UTF8.GetString(Convert.FromBase64String(auth.Parameter));
tokenModel = JsonConvert.DeserializeObject<TokenModel>(parsedToken);
}
catch(Exception ex)
{
Debug.WriteLine("Exception Occured while Deserializing: " + ex);
return Task.FromResult(AuthenticateResult.Fail("TokenParseException"));
}
if(tokenModel != null)
{
List<Claim> claims = new()
{
new Claim(ClaimTypes.Name, tokenModel.Name),
new Claim("Group", tokenModel?.GroupName)
};
if (tokenModel.UserId > 0)
{
claims.Add(new Claim(ClaimTypes.NameIdentifier, tokenModel.UserId.ToString()));
}
var claimsIdentity = new ClaimsIdentity(claims,
nameof(MyAuthenticationHandler));
var ticket = new AuthenticationTicket(
new ClaimsPrincipal(claimsIdentity), this.Scheme.Name);
// pass on the ticket to the middleware
return Task.FromResult(AuthenticateResult.Success(ticket));
}
}
return Task.FromResult(AuthenticateResult.Fail("Model is Empty"));
}
}
public class MyCustomAuthenticationSchemeOptions : AuthenticationSchemeOptions
{
}
I also use a UserSerivice (though not necessary) to relay some information like "user not connected", a work in progress. Just a addUser, getID, removeUser from a list of usermodel. This enables me to have the hub like this:
public class ChatHub : Hub
{
IUserService _userService;
public ChatHub(IUserService userService)
{
_userService = userService;
}
public async Task SendMessageAsync(int user, string message)
{
Debug.WriteLine(Context.UserIdentifier); //userID -> Claim.UserIdentifier
bool test1 = Context.User.Identity.IsAuthenticated; //true
string test2 = Context?.User?.Identity?.Name; //myUserName -> Claim.Name
if (_userService.GetById(user) == false)
await Clients.User(Context.UserIdentifier).SendAsync("ReceiveMessage", Context?.User?.Identity?.Name, $"user is not connected");
await Clients.User(user.ToString()).SendAsync("ReceiveMessage", Context?.User?.Identity?.Name, message);
}
public async Task SendMessageToGroupAsync(string groupname, string message)
{
await Clients.OthersInGroup(groupname).SendAsync("ReceiveMessage", groupname, message);
}
public async override Task OnConnectedAsync()
{
//TODO Register Context.UserIdentifier -
int conID = 0;
if(int.TryParse(Context.UserIdentifier, out conID) == true)
{
_userService.AddUser(conID, Context.ConnectionId);
}
await Groups.AddToGroupAsync(Context.ConnectionId, Context.User.Claims.First(c => c.Type == "Group").Value);
await base.OnConnectedAsync();
}
public override async Task OnDisconnectedAsync(Exception? exception)
{
int conID = 0;
if (int.TryParse(Context.ConnectionId, out conID) == true)
{
_userService.RemoveUser(conID, Context.ConnectionId); //TODO Should probably be async calls to service.
}
await base.OnDisconnectedAsync(exception); //According to https://github.com/dotnet/aspnetcore/issues/19043 users are removed from all groups by disconnecting. Test/resolve this.
}
}
Then in the program.cs you just add it like usual (the MyAuthenticationSchemeConstants are just the name and a random token value I've chosen for now) :
var builder = WebApplication.CreateBuilder(args);
var services = builder.Services;
// Add services to the container.
services.AddRazorPages();
services.AddServerSideBlazor();
services.AddAuthentication(options => options.DefaultAuthenticateScheme = MyAuthenticationSchemeConstants.MyAuthenticationSchemeName)
.AddScheme<MyCustomAuthenticationSchemeOptions, MyAuthenticationHandler>( MyAuthenticationSchemeConstants.MyAuthenticationSchemeName, options => { });
UserService _userService = new();
.
.
.
app.UseAuthentication();
app.UseAuthorization();
app.MapBlazorHub();
app.MapHub<ChatHub>("/hubs/chathub");
Client-Side example:
Just a winform with a couple of text fields and buttons using localhost for example purposes, but just swap out the url for a central hub url.
string url = "https://localhost:7185/hubs/chathub";
string token = "";
public Form1()
{
InitializeComponent();
SendBtn.Enabled = false;
//client = new(baseAddress);
}
private void BuildToken()
{
TokenModel tokenModel = new()
{
UserId = Int32.Parse(UserIDTB.Text),
Name = UsernameTB.Text,
GroupName = "Waiter",
EmailAddress = "someEmail#mydomain.com"
};
token = Convert.ToBase64String(Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(tokenModel)));
}
private async void HubConnectBtn_Click(object sender, EventArgs e)
{
BuildToken();
connection = new HubConnectionBuilder()
.WithUrl(url, options =>
{
options.AccessTokenProvider = () => Task.FromResult(token);
})
.WithAutomaticReconnect()
.Build();
connection.On<string, string>("ReceiveMessage", (user, message) =>
{
this.Invoke(() =>
{
var newMessage = $"{user}: {message}";
MessagesLB.Items.Add(newMessage);
});
});
try
{
await connection.StartAsync();
SendBtn.Enabled = true;
HubConnectBtn.Enabled = false;
MessagesLB.Items.Add("Connected!");
}
catch (Exception ex)
{
MessagesLB.Items.Add(ex.Message);
}
}
private async void SendBtn_Click(object sender, EventArgs e)
{
if (string.IsNullOrWhiteSpace(RecieverTB.Text))
{
MessagesLB.Items.Add("Write a recipient");
return;
}
if (string.IsNullOrWhiteSpace(MessageTB.Text))
{
MessagesLB.Items.Add("Write a message");
return;
}
try
{
await connection.InvokeAsync("SendMessageAsync", Int32.Parse(RecieverTB.Text), MessageTB.Text);
}
catch (Exception ex)
{
MessagesLB.Items.Add(ex.Message);
}
}
I hope this can help someone else!
Side note - if anyone has an input on how I can pass the Task.FromResult text to my clients that would be great!

I use signalr and jwt and my startup is a little different:
.AddJwtBearer(options =>
{
options.SaveToken = true;
options.RequireHttpsMetadata = false;
options.TokenValidationParameters = new TokenValidationParameters()
{
ValidateIssuer = true,
ValidateAudience = true,
ValidAudience = Configuration["JWT: ValidAudience"],
ValidIssuer = Configuration["JWT: ValidIssuer"],
IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(Configuration["JWT: SecretKey"]))
};
options.Events = new JwtBearerEvents
{
OnMessageReceived = context =>
{
var accessToken = context.Request.Query["access_token"];
// If the request is for our hub...
var path = context.HttpContext.Request.Path;
if (!string.IsNullOrEmpty(accessToken) &&
(path.StartsWithSegments("/api/hubs/")))
{
// Read the token out of the query string
context.Token = accessToken;
}
return Task.CompletedTask;
}
};
});
As you see you just have to set context.Token. But the token that signalr sends is obtained from the api through the authentication process. As you said, you authenticate sending a post request to a route on your api which could be something like this:
[HttpPost("authenticate")]
public async Task<ActionResult<AuthenticateResponse>> Post([FromBody]
AuthenticateRequest request)
{
AuthenticateResponse response = new AuthenticateResponse();
var result = await signInManager.PasswordSignInAsync(request.User,
request.Password, true, false);
if (result.Succeeded)
{
var user = await userManager.FindByNameAsync(request.User);
string[] roles = (await userManager.GetRolesAsync(user)).ToArray();
response.UserId = user.Id;
response.UserName = user.UserName;
response.Roles = roles;
response.Token = Helpers.TokenService.CreateToken(user, roles,
configuration);
}
else response.Error = "Authentication Error";
return Ok(response);
}
Here is the TokenService:
public static class TokenService
{
private const double EXPIRE_HOURS = 10;
public static string CreateToken(ApplicationUser user, string[] roles,
IConfiguration configuration)
{
var authClaims = new List<Claim>
{
new Claim(ClaimTypes.NameIdentifier, user.Id)
};
foreach (var userRole in roles)
{
authClaims.Add(new Claim(ClaimTypes.Role, userRole));
}
var authSigningKey = new
SymmetricSecurityKey(Encoding.UTF8.GetBytes(configuration["JWT:
SecretKey"]));
var token = new JwtSecurityToken(
issuer: configuration["JWT: ValidIssuer"],
audience: configuration["JWT: ValidAudience"],
expires: DateTime.Now.AddHours(EXPIRE_HOURS),
claims: authClaims,
signingCredentials: new SigningCredentials(authSigningKey,
SecurityAlgorithms.HmacSha256)
);
return new JwtSecurityTokenHandler().WriteToken(token);
}
}
And you have to derive your ApplicationdbContext from IdentityDbContext

SAML2 httpcontext is already authenticated

I'm trying to build an ASPNet SAML2 orientated WebApp and i'm facing issues. I'm using the ITFoxtec library to handle all the process but i'm struggling when a user is trying to reconnect on the webapp.
The scenario that causes the issue is the following:
Launch WebApp on a linux serveur on port 49500
Connect to the WebApp thanks to IE on a Windows session through the route "Auth/Login"
Token is generated and accessible
Try to regenerate once more the token through the route "Auth/Login"
And at this point, the WebApp trigger the following exception:
System.InvalidOperationException: There already exist an Authenticated user.
at ITfoxtec.Identity.Saml2.MvcCore.Saml2ResponseExtensions.CreateSession(Saml2AuthnResponse saml2AuthnResponse, HttpContext httpContext, Nullable`1 lifetime, Boolean isPersistent, Func`2 claimsTransform) in C:\XXXXX\ITfoxtec.Identity.Saml2-0c0cef05050d633f000be9399dc6a5b1a009a6da\src\ITfoxtec.Identity.Saml2.MvcCore\Extensions\Saml2ResponseExtensions.cs:line 24
After digging a little bit inside the ITFoxted code, the error is triggered by the HttpContext.User.Identity.IsAuthenticated being set to True when it's run on Linux. I've also seen that on the first iteration, HttpContext.User.Identity.AuthenticationType is set to null and on the second iteration it is set to Federation.
I have done multiple test on multiple environnment and i've end up with the following notes:
Running the WebApp on Windows with a local pfx works (even with multiple refresh)
Running the WebApp on Windows the AuthenticationType is never set to Federation
Listed below are the code for launching the WebApp and the AuthController.
[AllowAnonymous]
[EnableCors("SAML_CORS")]
[Route("Auth")]
public class SamlController : Controller
{
const string relayStateReturnUrl = "ReturnUrl";
const string ClaimMatricule = "matricule";
const string WebappsJwtRequest = "getJwt=true";
const string WebappsJwtFailure = "jwt=FAILED";
private readonly Saml2Configuration config;
public IConfiguration Configuration { get; private set; }
public SamlController(IConfiguration configuration, IOptions<Saml2Configuration> configAccessor)
{
this.Configuration = configuration;
config = configAccessor.Value;
}
[Route("Metadata")]
public ObjectResult Metadata()
{
X509Certificate2Collection certificates = new X509Certificate2Collection();
certificates.Import(Configuration["Saml2:SigningCertificateFile"], null, X509KeyStorageFlags.PersistKeySet);
var cert = certificates[0];
string publicSigingKey = Convert.ToBase64String(cert.RawData);
string metadataTemplate = System.IO.File.ReadAllText(Configuration["Jwt:SpMetadataFilePath"]);
metadataTemplate = metadataTemplate.Replace("PUBLIC_RSA_SHA1_SIGNING_CERTIFICATE", publicSigingKey);
metadataTemplate = metadataTemplate.Replace("USERNAME_ATTRIBUTE", Configuration["Saml2:ClaimIdentifierName"]);
string fullHostName = Dns.GetHostEntry("").HostName.ToLower();
if (!Configuration.GetSection("CustomIssuer").GetChildren().Any(item => item.Key == fullHostName))
{
fullHostName = "localhost";
}
metadataTemplate = metadataTemplate.Replace("ISSUER_TO_REPLACE", Configuration["CustomIssuer:" + fullHostName]);
string currentUrl = HttpContext.Request.Host.Value;
metadataTemplate = metadataTemplate.Replace("SAML_ASSERTION_CONSUMPTION_ENDPOINT", $"https://{currentUrl}/Auth/AssertionConsumerService");
return new ObjectResult(metadataTemplate)
{
StatusCode = (int)HttpStatusCode.OK
};
}
[Route("Login")]
public object Login(string returnUrl = null)
{
var binding = new Saml2RedirectBinding();
binding.SetRelayStateQuery(new Dictionary<string, string> { { relayStateReturnUrl, returnUrl ?? Url.Content("~/") } });
if (returnUrl != null && returnUrl.Contains(WebappsJwtFailure))
{
return View();
}
if (returnUrl != null && returnUrl.Contains(WebappsJwtRequest))
{
return binding.Bind(new Saml2AuthnRequest(config)
{
ForceAuthn = true,
}).RedirectLocation.ToString();
}
return binding.Bind(new Saml2AuthnRequest(config)
{
ForceAuthn = true,
}).ToActionResult();
}
[Route("AssertionConsumerService")]
public async Task<IActionResult> AssertionConsumerService()
{
var binding = new Saml2PostBinding();
var saml2AuthnResponse = new Saml2AuthnResponse(config);
binding.ReadSamlResponse(Request.ToGenericHttpRequest(), saml2AuthnResponse);
var relayStateQuery = binding.GetRelayStateQuery();
var returnUrl = relayStateQuery.ContainsKey(relayStateReturnUrl) ? relayStateQuery[relayStateReturnUrl] : Url.Content("~/");
if (saml2AuthnResponse.Status != Saml2StatusCodes.Success) {
var failureReason = $"Unsuccessful SAML Response status: {saml2AuthnResponse.Status}";
Console.WriteLine(failureReason);
returnUrl = returnUrl.Contains(WebappsJwtRequest) ? returnUrl.Replace(WebappsJwtRequest, $"jwt=FAILED({failureReason})") : $"{returnUrl}?jwt=FAILED";
return Redirect(returnUrl);
}
binding.Unbind(Request.ToGenericHttpRequest(), saml2AuthnResponse);
var samlContent = await saml2AuthnResponse.CreateSession(HttpContext, claimsTransform: (claimsPrincipal) => ClaimsTransform.Transform(claimsPrincipal));
var claims = samlContent.Claims;
var matricule = claims.Where(c => c.Type == Configuration["Saml2:ClaimIdentifierName"]).First().Value;
var jwt = this.GenerateJWT(matricule);
if (returnUrl.Contains(WebappsJwtRequest))
{
// If this endpoint is used as an API by the proxy SAML web app, then we need to send the JWT token to it
returnUrl = returnUrl.Replace(WebappsJwtRequest, "jwt=" + jwt);
}
return Redirect(returnUrl);
}
[HttpPost("Logout")]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Logout()
{
if (!User.Identity.IsAuthenticated)
{
return Redirect(Url.Content("~/"));
}
var binding = new Saml2PostBinding();
var saml2LogoutRequest = await new Saml2LogoutRequest(config, User).DeleteSession(HttpContext);
return Redirect("~/");
}
private string GenerateJWT(String userMatricule)
{
var securityKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(Configuration["Jwt:Key"]));
var credentials = new SigningCredentials(securityKey, SecurityAlgorithms.HmacSha512);
string fullHostName = Dns.GetHostEntry("").HostName.ToLower();
if (!Configuration.GetSection("CustomIssuer").GetChildren().Any(item => item.Key == fullHostName))
{
fullHostName = "localhost";
}
var token = new JwtSecurityToken(
Configuration["CustomIssuer:" + fullHostName],
Configuration["CustomIssuer:" + fullHostName],
new Claim[] { new Claim(ClaimMatricule, userMatricule) },
expires: DateTime.Now.AddMinutes(Double.Parse(Configuration["Jwt:ValidityDurationInMinutes"])),
signingCredentials: credentials
);
return new JwtSecurityTokenHandler().WriteToken(token);
}
}
Below, the launcher:
public class Program
{
public static void Main(string[] args)
{
var configuration = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
// custom config file
.AddJsonFile(IdentifyJsonConf(), optional: false, reloadOnChange: false)
.Build();
CreateWebHostBuilder(args, configuration).Build().Run();
}
public static IWebHostBuilder CreateWebHostBuilder(string[] args, IConfiguration conf)
{
return WebHost.CreateDefaultBuilder(args)
.UseWebRoot("wwwroot_saml")
.UseKestrel(options =>
{
options.ListenAnyIP(int.Parse(conf["Port"]), listenOptions =>
{
listenOptions.UseHttps(conf["Saml2:SigningCertificateFile"]);
});
})
.UseConfiguration(conf)
.UseStartup<Startup>();
}
private static string IdentifyJsonConf()
{
string currentDir = Directory.GetCurrentDirectory();
// On récupère le chemin du fichier de config (Linbux par defaut)
var confPath = #"xxxxxx";
var confFile = "xxxx.json";
var path = System.Reflection.Assembly.GetExecutingAssembly().Location;
var dir = Path.GetDirectoryName(path);
var configFileLinux = new FileInfo(Path.Combine(dir, confFile));
if (!configFileLinux.Exists)
{
configFileLinux = new FileInfo(Path.Combine(confPath, confFile));
}
// On recupere l'OS afin de determiner quel fichier de config utiliser
OperatingSystem os = Environment.OSVersion;
PlatformID pid = os.Platform;
switch (pid)
{
// Si on est sur du Windows, alors c'est pour du test
case PlatformID.Win32NT:
case PlatformID.Win32S:
case PlatformID.Win32Windows:
case PlatformID.WinCE:
Console.WriteLine("Getting xxxx.json config file because running on Windows!");
confFile = "xxxxx.json";
var configFileWindows = new FileInfo(Path.Combine(Environment.CurrentDirectory, confFile));
if (!configFileWindows.Exists)
{
configFileWindows = new FileInfo(Path.Combine(dir, confFile));
}
configFileLinux = configFileWindows;
break;
// Si on est sur du Linux
case PlatformID.Unix:
break;
default:
break;
}
return configFileLinux.Name;
}
}
Thanks for the help!

Is it a solution to add a IsAuthenticated check in the AuthController Login method?
Like this:
[Route("Login")]
public IActionResult Login(string returnUrl = null)
{
if (User.Identity.IsAuthenticated)
{
return Redirect(Url.Content("~/"));
}
var binding = new Saml2RedirectBinding();
binding.SetRelayStateQuery(new Dictionary<string, string> { { relayStateReturnUrl, returnUrl ?? Url.Content("~/") } });
... more code ...

.net 5 how to setup authorization using custom provider

in my .net 5 website i have to read user login from header and the call external webservice to check if is authorized and get permission list.
EDIT 3:
GOALS
Read current user from http header setted by corporate single sign-on
Read user permission and info by calling external web services and
keep them daved to prevent extra-calls for every action
let the user be free to access by any page
authorize by default all controller's actions with custom claims
Actual Problem
context.User.Identity.IsAuthenticated in middleware is always false
Actual code
Startup - ConfigureServices
services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme).AddCookie();
services.AddControllers(options => { options.Filters.Add<AuditAuthorizationFilter>(); });
services.AddSession(options =>
{
options.IdleTimeout = TimeSpan.FromSeconds(10);
options.Cookie.HttpOnly = true;
options.Cookie.IsEssential = true;
});
Startup - Configure
app.UseMiddleware<AuthenticationMiddleware>();
app.UseAuthentication();
app.UseAuthorization();
Middleware
public class AuthenticationMiddleware
{
private readonly RequestDelegate _next;
// Dependency Injection
public AuthenticationMiddleware(RequestDelegate next)
{
_next = next;
}
public async Task Invoke(HttpContext context)
{
if (!context.User.Identity.IsAuthenticated)
{
var claims = new List<Claim>
{
new Claim(ClaimTypes.Name, context.Request.Headers["Token"]),
};
var claimsIdentity = new ClaimsIdentity(claims, CookieAuthenticationDefaultsAuthenticationScheme);
var authProperties = new AuthenticationProperties();
await context.SignInAsync(
CookieAuthenticationDefaults.AuthenticationScheme,
new ClaimsPrincipal(claimsIdentity),
authProperties);
}
await _next(context);
}
}
Filter
public class AuditAuthorizationFilter : IAuthorizationFilter, IOrderedFilter
{
public int Order => -1;
private readonly IHttpContextAccessor _httpContextAccessor;
public AuditAuthorizationFilter(IHttpContextAccessor httpContextAccessor)
{
_httpContextAccessor = httpContextAccessor;
}
public void OnAuthorization(AuthorizationFilterContext context)
{
if (context.HttpContext.User.Identity.IsAuthenticated)
{
context.Result = new ForbidResult();
}
else
{
string metodo = $"{context.RouteData.Values["controller"]}/{context.RouteData.Values["action"]}";
if (!context.HttpContext.User.HasClaim("type", metodo))
{
context.Result = new ForbidResult();
}
}
}
}
EDIT 2:
my Startup
public void ConfigureServices(IServiceCollection services)
{
services.AddDevExpressControls();
services.AddTransient<ILoggingService, LoggingService>();
services.AddHttpContextAccessor();
services.AddMvc().SetCompatibilityVersion(Microsoft.AspNetCore.Mvc.CompatibilityVersion.Version_3_0);
services.ConfigureReportingServices(configurator => {
configurator.UseAsyncEngine();
configurator.ConfigureWebDocumentViewer(viewerConfigurator => {
viewerConfigurator.UseCachedReportSourceBuilder();
});
});
services.AddControllersWithViews().AddJsonOptions(options => options.JsonSerializerOptions.PropertyNamingPolicy = null);
services.AddControllersWithViews().AddRazorRuntimeCompilation();
services.AddControllers(options => { options.Filters.Add(new MyAuthenticationAttribute ()); });
services.AddDistributedMemoryCache();
services.AddSession(options =>
{
options.IdleTimeout = TimeSpan.FromSeconds(10);
options.Cookie.HttpOnly = true;
options.Cookie.IsEssential = true;
});
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILoggerFactory loggerFactory)
{
app.UseDevExpressControls();
app.UseExceptionHandlerMiddleware(Log.Logger, errorPagePath: "/Error/HandleError" , respondWithJsonErrorDetails: true);
app.UseStatusCodePagesWithReExecute("/Error/HandleError/{0}");
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseSerilogRequestLogging(opts => opts.EnrichDiagnosticContext = LogHelper.EnrichFromRequest);
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.UseSession();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllerRoute(
name: "default",
pattern: "{controller=Home}/{action=Index}/{id?}");
});
}
EDIT 1:
to adapt original code to .net 5 i made some changes:
if (!context.HttpContext.User.Identity.IsAuthenticated)
{
const string MyHeaderToken = "HTTP_KEY";
string userSSO = null;
if (string.IsNullOrWhiteSpace(context.HttpContext.Request.Headers[MyHeaderToken]))
{
userSSO = context.HttpContext.Request.Headers[MyHeaderToken];
}
if (string.IsNullOrWhiteSpace(userSSO))
{
//filterContext.Result = new unh();
}
else
{
// Create GenericPrincipal
GenericIdentity webIdentity = new GenericIdentity(userSSO, "My");
//string[] methods = new string[0]; // GetMethods(userSSO);
GenericPrincipal principal = new GenericPrincipal(webIdentity, null);
IdentityUser user = new (userSSO);
Thread.CurrentPrincipal = principal;
}
}
but context.HttpContext.User.Identity.IsAuthenticated is false everytimes, even if the previous action set principal
ORIGINAL:
I'using custom attribute to manage this scenario in this way:
public class MyAuthenticationAttribute : ActionFilterAttribute, IAuthenticationFilter{
public string[] Roles { get; set; }
public void OnAuthentication(AuthenticationContext filterContext)
{
string MyHeaderToken = “SM_USER”;
string userSSO = null;
if (HttpContext.Current.Request.Headers[MyHeaderToken] != null)
{
userSSO = HttpContext.Current.Request.Headers[MyHeaderToken];
Trace.WriteLine(string.Format(“got MyToken: {0}”, userSSO));
}
if (string.IsNullOrWhiteSpace(userSSO))
{
Trace.WriteLine(“access denied, no token found”);
}
else
{
// Create GenericPrincipal
GenericIdentity webIdentity = new GenericIdentity(userSSO, “My”);
string[] methods= GetMethods(userSSO);
GenericPrincipal principal = new GenericPrincipal(webIdentity, methods);
filterContext.HttpContext.User = principal;
}
}
public void OnAuthenticationChallenge(AuthenticationChallengeContext filterContext)
{
//check authorizations
}
}
but external webservice returns list of controller/action authorized for users, so i have to test all actions executions to simply check if names is contained in the list.
is there a way to do this without have to write attribute on every actions or every controllers in this way:
[MyAuthentication(Roles = “Admin”)]
pubic class AdminController: Controller
{
}
i know i can use
services.AddMvc(o =>
{
var policy = new AuthorizationPolicyBuilder()
.RequireAuthenticatedUser()
.Build();
o.Filters.Add(new AuthorizeFilter(policy));
});
but no idea of how to use this with my custom authorization
i'am also not sure if string[] methods= GetMethods(userSSO) is cached by .net core filterContext.HttpContext.User avoiding multiple calls to external webservice.
Thanks

If you want to apply your custom IAuthenticationFilter globally then you can do the ff:
services.AddControllers(options =>
{
options.Filters.Add(new MyAuthenticationFilter());
});
With this approach, you no longer need to inherit from ActionFilterAttribute and no need to add the [MyAuthentication(Roles = “Admin”)] attributes.
Just ensure that you are allowing anonymous requests to actions that doesn't need authentication and/or authorization.
EDIT 2:
For your updated setup, make sure you do the ff:
Add cookie authentication
services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme) .AddCookie();
Order of middlewares
app.UseRouting();
app.UseAuthentication();
app.UseMiddleware<AuthenticationMiddleware>();
app.UseAuthorization();
EDIT 1:
i'am also not sure if string[] methods= GetMethods(userSSO) is cached by .net core filterContext.HttpContext.User avoiding multiple calls to external webservice.
The lifetime of the filter depends on how you implemented it, usually it is singleton but you can make it transient by following the approach below:
public class MyAuthorizationFilter : IAuthorizationFilter, IOrderedFilter
{
public int Order => -1; // Ensures that it runs first before basic Authorize filter
public void OnAuthorization(AuthorizationFilterContext context)
{
if (!context.HttpContext.User.Identity.IsAuthenticated)
{
if (context.HttpContext.Session.IsAvailable
&& context.HttpContext.Session.TryGetValue("_SessionUser", out byte[] _user))
{
SessionUser su = (SessionUser)this.ByteArrayToObject(_user);
GenericPrincipal principal = this.CreateGenericPrincipal(su.IdentityName, su.Type, su.Roles);
context.HttpContext.User = principal;
}
else
{
const string MyHeaderToken = "HTTP_KEY";
string userSSO = null;
if (!string.IsNullOrWhiteSpace(context.HttpContext.Request.Headers[MyHeaderToken]))
{
userSSO = context.HttpContext.Request.Headers[MyHeaderToken];
}
userSSO = "TestUser";
if (string.IsNullOrWhiteSpace(userSSO))
{
//filterContext.Result = new unh();
}
else
{
string identityType = "My";
string[] methods = new string[0]; // GetMethods(userSSO);
// Create GenericPrincipal
GenericPrincipal principal = this.CreateGenericPrincipal(userSSO, identityType, methods);
context.HttpContext.User = principal;
if (context.HttpContext.Session.IsAvailable)
{
SessionUser su = new SessionUser()
{
IdentityName = principal.Identity.Name,
Type = principal.Identity.AuthenticationType,
Roles = methods
};
byte[] _sessionUser = this.ObjectToByteArray(su);
context.HttpContext.Session.Set("_SessionUser", _sessionUser);
}
}
}
}
}
private GenericPrincipal CreateGenericPrincipal(string name, string type, string[] roles)
{
GenericIdentity webIdentity = new GenericIdentity(name, type);
GenericPrincipal principal = new GenericPrincipal(webIdentity, roles);
return principal;
}
// Convert an object to a byte array
private byte[] ObjectToByteArray(Object obj)
{
BinaryFormatter bf = new BinaryFormatter();
using (var ms = new MemoryStream())
{
bf.Serialize(ms, obj);
return ms.ToArray();
}
}
// Convert a byte array to an Object
private Object ByteArrayToObject(byte[] arrBytes)
{
using (var memStream = new MemoryStream())
{
var binForm = new BinaryFormatter();
memStream.Write(arrBytes, 0, arrBytes.Length);
memStream.Seek(0, SeekOrigin.Begin);
var obj = binForm.Deserialize(memStream);
return obj;
}
}
[Serializable]
private class SessionUser
{
public string IdentityName { get; set; }
public string Type { get; set; }
public string[] Roles { get; set; }
}
}
public class MyAuthorizationAttribute : TypeFilterAttribute
{
public MyAuthorizationAttribute()
: base(typeof(MyAuthorizationFilter))
{
}
}
On Startup.cs > Configure call app.UseSession(); immediately after app.UseRouting() so that session will be available during authorization.
The code above will set the current HTTP Context's user and save it on session. Subsequent requests will attempt to use the user stored on the session. This will also make the DI container manage the lifetime of the filter. Read more about it in Filters in ASP.NET Core.
I do not recommend you follow this approach. Please do either cookie or token-based authentication by taking advantage of the authentication middleware in .NET Core.
Once the request reaches the action execution, context.HttpContext.User.Identity.IsAuthenticated will now be true.

How to implement Basic Authentication and Authorization in a .net core rest service?

I'm new to the .NET Core REST API. This is my first shot on implementing basic authentication and authorization after. So far it's working.
I'd like to know whether this is done properly. Any comment or suggestion for improvement ist highly appreciated.
Key compontents are an authentication middleware and an usernames handler.
In the authentication middleware username and password passed by the authorization header are checked against the valid logins.
If the login is valid, a new identity is added to the the user object with the label set to the passed in username (plus a fudge in front of it).
In the usernames handler this new identity is being used to authorize the user.
Here's the relevant piesces of code:
appsettings.json
{
"Logins": {
"test": "B0Lo8tsQpKs=",
"tryme": "B0Lo8tsQpKs="
},
"Policies": {
"UserPolicySnrCounter": "test,tryme"
}
}
Startup
public void ConfigureServices(IServiceCollection services)
{
var policies = Configuration.GetSection("Policies");
...
services.AddAuthentication().AddCustomAuth(options => {});
services.AddSingleton<IAuthorizationHandler, UserNamesHandler>();
services.AddAuthorization(options =>
{
options.AddPolicy("PolicySnrCounter", policy => policy.Requirements.Add(new UserNamesRequirement(policies.GetValue<string>("UserPolicySnrCounter"))));
});
}
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
app.UseAuthentication();
app.UseMiddleware<AuthenticationMiddleware>(Configuration.GetSection("Logins"));
...
}
AuthenticationMiddleware
public async Task Invoke(HttpContext context)
{
string authHeader = context.Request.Headers["Authorization"];
if (authHeader != null && authHeader.StartsWith("Basic"))
{
string encodedUsernamePassword = authHeader.Substring("Basic ".Length).Trim();
string usernamePassword = _encoding.GetString(Convert.FromBase64String(encodedUsernamePassword));
int seperatorIndex = usernamePassword.IndexOf(':');
var username = usernamePassword.Substring(0, seperatorIndex);
var password = usernamePassword.Substring(seperatorIndex + 1);
var loginPassword = _logins.GetValue<string>(username);
if (string.IsNullOrEmpty(loginPassword))
{
context.Response.StatusCode = 401; //Unauthorized
return;
}
else
{
loginPassword = Crypto.Decrypt(loginPassword);
}
if (password == loginPassword)
{
context.User.AddIdentity(new System.Security.Claims.ClaimsIdentity() { Label = "CustomAuth" + username });
await _next.Invoke(context);
}
else
{
context.Response.StatusCode = 401; //Unauthorized
return;
}
}
else
{
// no authorization header
context.Response.StatusCode = 401; //Unauthorized
return;
}
}
UserNamesHandler
public class UserNamesHandler : AuthorizationHandler<UserNamesRequirement>
{
protected override async Task HandleRequirementAsync(AuthorizationHandlerContext context, UserNamesRequirement requirement)
{
var userNames = (UserNamesRequirement)context.Requirements.FirstOrDefault();
var currentUserClaimsIdentity = context.User.Identities.FirstOrDefault(p => p.Label != null && p.Label.StartsWith("CustomAuth"));
if (userNames != null && currentUserClaimsIdentity != null)
{
var names = userNames.UserNames[0].Split(',').ToList();
var currentUser = currentUserClaimsIdentity.Label.Replace("CustomAuth", "");
if (names.Any(s => s.Equals(currentUser)))
{
context.Succeed(requirement);
}
}
await Task.CompletedTask;
}

ASP.NET Core Web API Authentication

I'm struggling with how to set up authentication in my web service.
The service is build with the ASP.NET Core web api.
All my clients (WPF applications) should use the same credentials to call the web service operations.
After some research, I came up with basic authentication - sending a username and password in the header of the HTTP request.
But after hours of research, it seems to me that basic authentication is not the way to go in ASP.NET Core.
Most of the resources I found are implementing authentication using OAuth or some other middleware. But that seems to be oversized for my scenario, as well as using the Identity part of ASP.NET Core.
So what is the right way to achieve my goal - simple authentication with username and password in a ASP.NET Core web service?

Now, after I was pointed in the right direction, here's my complete solution:
This is the middleware class which is executed on every incoming request and checks if the request has the correct credentials. If no credentials are present or if they are wrong, the service responds with a 401 Unauthorized error immediately.
public class AuthenticationMiddleware
{
private readonly RequestDelegate _next;
public AuthenticationMiddleware(RequestDelegate next)
{
_next = next;
}
public async Task Invoke(HttpContext context)
{
string authHeader = context.Request.Headers["Authorization"];
if (authHeader != null && authHeader.StartsWith("Basic"))
{
//Extract credentials
string encodedUsernamePassword = authHeader.Substring("Basic ".Length).Trim();
Encoding encoding = Encoding.GetEncoding("iso-8859-1");
string usernamePassword = encoding.GetString(Convert.FromBase64String(encodedUsernamePassword));
int seperatorIndex = usernamePassword.IndexOf(':');
var username = usernamePassword.Substring(0, seperatorIndex);
var password = usernamePassword.Substring(seperatorIndex + 1);
if(username == "test" && password == "test" )
{
await _next.Invoke(context);
}
else
{
context.Response.StatusCode = 401; //Unauthorized
return;
}
}
else
{
// no authorization header
context.Response.StatusCode = 401; //Unauthorized
return;
}
}
}
The middleware extension needs to be called in the Configure method of the service Startup class
public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
loggerFactory.AddConsole(Configuration.GetSection("Logging"));
loggerFactory.AddDebug();
app.UseMiddleware<AuthenticationMiddleware>();
app.UseMvc();
}
And that's all! :)
A very good resource for middleware in .Net Core and authentication can be found here:
https://www.exceptionnotfound.net/writing-custom-middleware-in-asp-net-core-1-0/

You can implement a middleware which handles Basic authentication.
public async Task Invoke(HttpContext context)
{
var authHeader = context.Request.Headers.Get("Authorization");
if (authHeader != null && authHeader.StartsWith("basic", StringComparison.OrdinalIgnoreCase))
{
var token = authHeader.Substring("Basic ".Length).Trim();
System.Console.WriteLine(token);
var credentialstring = Encoding.UTF8.GetString(Convert.FromBase64String(token));
var credentials = credentialstring.Split(':');
if(credentials[0] == "admin" && credentials[1] == "admin")
{
var claims = new[] { new Claim("name", credentials[0]), new Claim(ClaimTypes.Role, "Admin") };
var identity = new ClaimsIdentity(claims, "Basic");
context.User = new ClaimsPrincipal(identity);
}
}
else
{
context.Response.StatusCode = 401;
context.Response.Headers.Set("WWW-Authenticate", "Basic realm=\"dotnetthoughts.net\"");
}
await _next(context);
}
This code is written in a beta version of asp.net core. Hope it helps.

To use this only for specific controllers for example use this:
app.UseWhen(x => (x.Request.Path.StartsWithSegments("/api", StringComparison.OrdinalIgnoreCase)),
builder =>
{
builder.UseMiddleware<AuthenticationMiddleware>();
});

I think you can go with JWT (Json Web Tokens).
First you need to install the package System.IdentityModel.Tokens.Jwt:
$ dotnet add package System.IdentityModel.Tokens.Jwt
You will need to add a controller for token generation and authentication like this one:
public class TokenController : Controller
{
[Route("/token")]
[HttpPost]
public IActionResult Create(string username, string password)
{
if (IsValidUserAndPasswordCombination(username, password))
return new ObjectResult(GenerateToken(username));
return BadRequest();
}
private bool IsValidUserAndPasswordCombination(string username, string password)
{
return !string.IsNullOrEmpty(username) && username == password;
}
private string GenerateToken(string username)
{
var claims = new Claim[]
{
new Claim(ClaimTypes.Name, username),
new Claim(JwtRegisteredClaimNames.Nbf, new DateTimeOffset(DateTime.Now).ToUnixTimeSeconds().ToString()),
new Claim(JwtRegisteredClaimNames.Exp, new DateTimeOffset(DateTime.Now.AddDays(1)).ToUnixTimeSeconds().ToString()),
};
var token = new JwtSecurityToken(
new JwtHeader(new SigningCredentials(
new SymmetricSecurityKey(Encoding.UTF8.GetBytes("Secret Key You Devise")),
SecurityAlgorithms.HmacSha256)),
new JwtPayload(claims));
return new JwtSecurityTokenHandler().WriteToken(token);
}
}
After that update Startup.cs class to look like below:
namespace WebAPISecurity
{
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddMvc();
services.AddAuthentication(options => {
options.DefaultAuthenticateScheme = "JwtBearer";
options.DefaultChallengeScheme = "JwtBearer";
})
.AddJwtBearer("JwtBearer", jwtBearerOptions =>
{
jwtBearerOptions.TokenValidationParameters = new TokenValidationParameters
{
ValidateIssuerSigningKey = true,
IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes("Secret Key You Devise")),
ValidateIssuer = false,
//ValidIssuer = "The name of the issuer",
ValidateAudience = false,
//ValidAudience = "The name of the audience",
ValidateLifetime = true, //validate the expiration and not before values in the token
ClockSkew = TimeSpan.FromMinutes(5) //5 minute tolerance for the expiration date
};
});
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseAuthentication();
app.UseMvc();
}
}
And that's it, what is left now is to put [Authorize] attribute on the Controllers or Actions you want.
Here is a link of a complete straight forward tutorial.
http://www.blinkingcaret.com/2017/09/06/secure-web-api-in-asp-net-core/

I have implemented BasicAuthenticationHandler for basic authentication so you can use it with standart attributes Authorize and AllowAnonymous.
public class BasicAuthenticationHandler : AuthenticationHandler<BasicAuthenticationOptions>
{
protected override Task<AuthenticateResult> HandleAuthenticateAsync()
{
var authHeader = (string)this.Request.Headers["Authorization"];
if (!string.IsNullOrEmpty(authHeader) && authHeader.StartsWith("basic", StringComparison.OrdinalIgnoreCase))
{
//Extract credentials
string encodedUsernamePassword = authHeader.Substring("Basic ".Length).Trim();
Encoding encoding = Encoding.GetEncoding("iso-8859-1");
string usernamePassword = encoding.GetString(Convert.FromBase64String(encodedUsernamePassword));
int seperatorIndex = usernamePassword.IndexOf(':', StringComparison.OrdinalIgnoreCase);
var username = usernamePassword.Substring(0, seperatorIndex);
var password = usernamePassword.Substring(seperatorIndex + 1);
//you also can use this.Context.Authentication here
if (username == "test" && password == "test")
{
var user = new GenericPrincipal(new GenericIdentity("User"), null);
var ticket = new AuthenticationTicket(user, new AuthenticationProperties(), Options.AuthenticationScheme);
return Task.FromResult(AuthenticateResult.Success(ticket));
}
else
{
return Task.FromResult(AuthenticateResult.Fail("No valid user."));
}
}
this.Response.Headers["WWW-Authenticate"]= "Basic realm=\"yourawesomesite.net\"";
return Task.FromResult(AuthenticateResult.Fail("No credentials."));
}
}
public class BasicAuthenticationMiddleware : AuthenticationMiddleware<BasicAuthenticationOptions>
{
public BasicAuthenticationMiddleware(
RequestDelegate next,
IOptions<BasicAuthenticationOptions> options,
ILoggerFactory loggerFactory,
UrlEncoder encoder)
: base(next, options, loggerFactory, encoder)
{
}
protected override AuthenticationHandler<BasicAuthenticationOptions> CreateHandler()
{
return new BasicAuthenticationHandler();
}
}
public class BasicAuthenticationOptions : AuthenticationOptions
{
public BasicAuthenticationOptions()
{
AuthenticationScheme = "Basic";
AutomaticAuthenticate = true;
}
}
Registration at Startup.cs - app.UseMiddleware<BasicAuthenticationMiddleware>();. With this code, you can restrict any controller with standart attribute Autorize:
[Authorize(ActiveAuthenticationSchemes = "Basic")]
[Route("api/[controller]")]
public class ValuesController : Controller
and use attribute AllowAnonymous if you apply authorize filter on application level.

As rightly said by previous posts, one of way is to implement a custom basic authentication middleware. I found the best working code with explanation in this blog:
Basic Auth with custom middleware
I referred the same blog but had to do 2 adaptations:
While adding the middleware in startup file -> Configure function, always add custom middleware before adding app.UseMvc().
While reading the username, password from appsettings.json file, add static read only property in Startup file. Then read from appsettings.json. Finally, read the values from anywhere in the project. Example:
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
public static string UserNameFromAppSettings { get; private set; }
public static string PasswordFromAppSettings { get; private set; }
//set username and password from appsettings.json
UserNameFromAppSettings = Configuration.GetSection("BasicAuth").GetSection("UserName").Value;
PasswordFromAppSettings = Configuration.GetSection("BasicAuth").GetSection("Password").Value;
}

You can use an ActionFilterAttribute
public class BasicAuthAttribute : ActionFilterAttribute
{
public string BasicRealm { get; set; }
protected NetworkCredential Nc { get; set; }
public BasicAuthAttribute(string user,string pass)
{
this.Nc = new NetworkCredential(user,pass);
}
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
var req = filterContext.HttpContext.Request;
var auth = req.Headers["Authorization"].ToString();
if (!String.IsNullOrEmpty(auth))
{
var cred = System.Text.Encoding.UTF8.GetString(Convert.FromBase64String(auth.Substring(6)))
.Split(':');
var user = new {Name = cred[0], Pass = cred[1]};
if (user.Name == Nc.UserName && user.Pass == Nc.Password) return;
}
filterContext.HttpContext.Response.Headers.Add("WWW-Authenticate",
String.Format("Basic realm=\"{0}\"", BasicRealm ?? "Ryadel"));
filterContext.Result = new UnauthorizedResult();
}
}
and add the attribute to your controller
[BasicAuth("USR", "MyPassword")]

In this public Github repo
https://github.com/boskjoett/BasicAuthWebApi
you can see a simple example of a ASP.NET Core 2.2 web API with endpoints protected by Basic Authentication.

ASP.NET Core 2.0 with Angular
https://fullstackmark.com/post/13/jwt-authentication-with-aspnet-core-2-web-api-angular-5-net-core-identity-and-facebook-login
Make sure to use type of authentication filter
[Authorize(AuthenticationSchemes = JwtBearerDefaults.AuthenticationScheme)]