Implemented proper node authentication

MoonlightServers.Daemon/Helpers/TokenAuthScheme.cs

@@ -0,0 +1,49 @@
+using System.Security.Claims;
+using System.Text.Encodings.Web;
+using Microsoft.AspNetCore.Authentication;
+using Microsoft.Extensions.Options;
+
+namespace MoonlightServers.Daemon.Helpers;
+
+public class TokenAuthScheme : AuthenticationHandler<TokenAuthOptions>
+{
+    public TokenAuthScheme(IOptionsMonitor<TokenAuthOptions> options, ILoggerFactory logger, UrlEncoder encoder,
+        ISystemClock clock) : base(options, logger, encoder, clock)
+    {
+    }
+
+    public TokenAuthScheme(IOptionsMonitor<TokenAuthOptions> options, ILoggerFactory logger, UrlEncoder encoder) : base(
+        options, logger, encoder)
+    {
+    }
+
+    protected override Task<AuthenticateResult> HandleAuthenticateAsync()
+    {
+        if (!Request.Headers.ContainsKey("Authorization"))
+            return Task.FromResult(AuthenticateResult.NoResult());
+
+        var authHeaderValue = Request.Headers["Authorization"].FirstOrDefault();
+
+        if (string.IsNullOrEmpty(authHeaderValue))
+            return Task.FromResult(AuthenticateResult.NoResult());
+
+        if (!authHeaderValue.Contains("Bearer "))
+            return Task.FromResult(AuthenticateResult.NoResult());
+
+        var providedToken = authHeaderValue
+            .Replace("Bearer ", "")
+            .Trim();
+
+        if (providedToken != Options.Token)
+            return Task.FromResult(AuthenticateResult.NoResult());
+
+        return Task.FromResult(AuthenticateResult.Success(
+            new AuthenticationTicket(
+                new ClaimsPrincipal(
+                    new ClaimsIdentity("token")
+                ),
+                "token"
+            )
+        ));
+    }
+}