feat(security): wire DisableLogin flag — auto-login scheme + startup warning

docs/plans/2026-06-16-disable-login.md.tasks.json

@@ -4,8 +4,8 @@
   "branch": "feature/disable-login",
   "tasks": [
     {"id": 62, "ref": "DL-1", "subject": "AuthDisableLoginOptions + Roles.All", "class": "small", "status": "completed", "commits": ["72691e5"]},
-    {"id": 63, "ref": "DL-2", "subject": "AutoLoginAuthenticationHandler + tests", "class": "high-risk", "status": "completed", "blockedBy": [62]},
-    {"id": 64, "ref": "DL-3", "subject": "Wire flag into AddSecurity + Host + startup warning", "class": "standard", "status": "pending", "blockedBy": [62, 63]},
+    {"id": 63, "ref": "DL-2", "subject": "AutoLoginAuthenticationHandler + tests", "class": "high-risk", "status": "completed", "blockedBy": [62], "commits": ["dcd445a", "0926ce4"]},
+    {"id": 64, "ref": "DL-3", "subject": "Wire flag into AddSecurity + Host + startup warning", "class": "standard", "status": "completed", "blockedBy": [62, 63]},
     {"id": 65, "ref": "DL-4", "subject": "Docs + dev config note", "class": "trivial", "status": "pending", "blockedBy": [64]}
   ],
   "lastUpdated": "2026-06-16"

src/ZB.MOM.WW.ScadaBridge.Host/Program.cs

@@ -121,7 +121,15 @@ try
         builder.Services.AddZbLdapAuth(
             builder.Configuration,
             ZB.MOM.WW.ScadaBridge.Security.ServiceCollectionExtensions.LdapSectionPath);
-        builder.Services.AddSecurity();
+        // Dev disable-login flag (config-coupled, so read + bound here at the composition root,
+        // mirroring AddZbLdapAuth). Default false. See AuthDisableLoginOptions / disable-login design doc.
+        builder.Services.AddOptions<ZB.MOM.WW.ScadaBridge.Security.Auth.AuthDisableLoginOptions>()
+            .Bind(builder.Configuration.GetSection(
+                ZB.MOM.WW.ScadaBridge.Security.Auth.AuthDisableLoginOptions.SectionName));
+        var disableLogin = builder.Configuration
+            .GetSection(ZB.MOM.WW.ScadaBridge.Security.Auth.AuthDisableLoginOptions.SectionName)
+            .GetValue<bool>(nameof(ZB.MOM.WW.ScadaBridge.Security.Auth.AuthDisableLoginOptions.DisableLogin));
+        builder.Services.AddSecurity(disableLogin);
         builder.Services.AddCentralUI();
         builder.Services.AddInboundAPI();
 

src/ZB.MOM.WW.ScadaBridge.Security/ServiceCollectionExtensions.cs

@@ -36,8 +36,15 @@ public static class ServiceCollectionExtensions
     /// <c>IConfiguration</c>) and component libraries must not accept <c>IConfiguration</c>.
     /// </remarks>
     /// <param name="services">The service collection to register into.</param>
+    /// <param name="disableLogin">
+    /// Dev/test flag (bound from <see cref="Auth.AuthDisableLoginOptions"/> by the Host
+    /// composition root). When true the cookie handler is replaced — under the same cookie
+    /// scheme name — by an always-succeeding <see cref="Auth.AutoLoginAuthenticationHandler"/>
+    /// that authenticates every request as the configured dev user with ALL roles, and a loud
+    /// startup warning is emitted. Default false. Never enable in production.
+    /// </param>
     /// <returns>The same <paramref name="services"/> instance for chaining.</returns>
-    public static IServiceCollection AddSecurity(this IServiceCollection services)
+    public static IServiceCollection AddSecurity(this IServiceCollection services, bool disableLogin = false)
     {
         // Task 1.2 cutover: ScadaBridge's bespoke LdapAuthService was replaced by the
         // shared ZB.MOM.WW.Auth.Ldap implementation (ScadaBridge was the donor for its
@@ -104,8 +111,27 @@ public static class ServiceCollectionExtensions
         // timeout, HTTPS policy) are applied via the SecurityOptions-bound PostConfigure
         // below (cookie name through SecurityOptions.CookieName, the rest through
         // ZbCookieDefaults.Apply).
-        services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)
-            .AddCookie(options =>
+        var authBuilder = services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme);
+        if (disableLogin)
+        {
+            // DEV/TEST ONLY: replace the cookie handler with an always-succeeding handler registered
+            // UNDER the cookie scheme name, so every authorization policy (which names this scheme)
+            // authenticates through it with all roles — zero policy changes. No cookie is written;
+            // OnValidatePrincipal (idle/refresh) does not apply in this mode. See AuthDisableLoginOptions.
+            authBuilder.AddScheme<AuthenticationSchemeOptions, Auth.AutoLoginAuthenticationHandler>(
+                CookieAuthenticationDefaults.AuthenticationScheme, _ => { });
+
+            services.AddOptions<Auth.AuthDisableLoginOptions>()
+                .PostConfigure<ILoggerFactory>((opts, lf) =>
+                    lf.CreateLogger("ZB.MOM.WW.ScadaBridge.Security").LogWarning(
+                        "AUTH DISABLED (ScadaBridge:Security:Auth:DisableLogin=true) — every request is " +
+                        "authenticated as '{User}' with FULL permissions ({Roles}) across ALL sites. This " +
+                        "is a SCADA control surface; dev/test ONLY — never enable in production.",
+                        opts.User, string.Join(",", Roles.All)));
+        }
+        else
+        {
+            authBuilder.AddCookie(options =>
             {
                 options.LoginPath = "/login";
                 options.LogoutPath = "/auth/logout";
@@ -126,6 +152,7 @@ public static class ServiceCollectionExtensions
                 // keeps the session (mirrors "LDAP failure: active sessions continue").
                 options.Events.OnValidatePrincipal = OnValidatePrincipalAsync;
             });
+        }
 
         // CentralUI-005: configure the cookie session as a sliding window so the
         // code matches the documented policy ("sliding refresh, 30-minute idle
@@ -147,6 +174,8 @@ public static class ServiceCollectionExtensions
         // the shared ZbCookieDefaults.Apply, with requireHttps + idleTimeout driven
         // by SecurityOptions so behaviour (30-min sliding idle window, HTTPS-only
         // unless explicitly opted out) is preserved.
+        // Harmless/unused when disableLogin is true: the cookie handler is not registered,
+        // so this CookieAuthenticationOptions PostConfigure has no scheme to configure.
         services.AddOptions<CookieAuthenticationOptions>(CookieAuthenticationDefaults.AuthenticationScheme)
             .Configure<IOptions<SecurityOptions>, ILoggerFactory>((cookieOptions, securityOptions, loggerFactory) =>
             {

tests/ZB.MOM.WW.ScadaBridge.Security.Tests/DisableLoginRegistrationTests.cs

@@ -0,0 +1,35 @@
+using Microsoft.AspNetCore.Authentication;
+using Microsoft.AspNetCore.Authentication.Cookies;
+using Microsoft.Extensions.DependencyInjection;
+using ZB.MOM.WW.ScadaBridge.Security;
+using ZB.MOM.WW.ScadaBridge.Security.Auth;
+using Xunit;
+
+namespace ZB.MOM.WW.ScadaBridge.Security.Tests;
+
+public class DisableLoginRegistrationTests
+{
+    private static async Task<AuthenticationScheme?> ResolveCookieSchemeAsync(bool disableLogin)
+    {
+        var services = new ServiceCollection();
+        services.AddLogging();
+        services.AddSecurity(disableLogin);
+        await using var sp = services.BuildServiceProvider();
+        var provider = sp.GetRequiredService<IAuthenticationSchemeProvider>();
+        return await provider.GetSchemeAsync(CookieAuthenticationDefaults.AuthenticationScheme);
+    }
+
+    [Fact]
+    public async Task FlagTrue_RegistersAutoLoginHandlerUnderCookieScheme()
+    {
+        var scheme = await ResolveCookieSchemeAsync(disableLogin: true);
+        Assert.Equal(typeof(AutoLoginAuthenticationHandler), scheme!.HandlerType);
+    }
+
+    [Fact]
+    public async Task FlagFalse_RegistersCookieHandler()
+    {
+        var scheme = await ResolveCookieSchemeAsync(disableLogin: false);
+        Assert.Equal(typeof(CookieAuthenticationHandler), scheme!.HandlerType);
+    }
+}