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V14: Deny login screen access #16034

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Apr 11, 2024
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Original file line number Diff line number Diff line change
@@ -1,13 +1,14 @@
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Options;
using Umbraco.Cms.Core;
using Umbraco.Cms.Core.Configuration.Models;
using Umbraco.Cms.Core.Hosting;

namespace Umbraco.Cms.Api.Management;

[BindProperties]
public class
BackOfficeLoginModel
public class BackOfficeLoginModel
{
/// <summary>
/// Gets or sets the value of the "ReturnUrl" query parameter or defaults to the configured Umbraco directory.
Expand All @@ -19,6 +20,8 @@ public class
/// The configured Umbraco directory.
/// </summary>
public string? UmbracoUrl { get; set; }

public bool UserIsAlreadyLoggedIn { get; set; }
}

[ApiExplorerSettings(IgnoreApi=true)]
Expand All @@ -38,13 +41,24 @@ public BackOfficeLoginController(
}

// GET
public IActionResult Index(CancellationToken cancellationToken, BackOfficeLoginModel model)
public async Task<IActionResult> Index(CancellationToken cancellationToken, BackOfficeLoginModel model)
{
AuthenticateResult cookieAuthResult = await HttpContext.AuthenticateAsync(Constants.Security.BackOfficeAuthenticationType);
if (cookieAuthResult.Succeeded)
{
model.UserIsAlreadyLoggedIn = true;
}

if (string.IsNullOrEmpty(model.UmbracoUrl))
{
model.UmbracoUrl = _hostingEnvironment.ToAbsolute(_globalSettings.UmbracoPath);
}

if (Uri.TryCreate(model.ReturnUrl, UriKind.Absolute, out _))
{
return BadRequest("ReturnUrl must be a relative path.");
}

if (string.IsNullOrEmpty(model.ReturnUrl))
{
model.ReturnUrl = model.UmbracoUrl;
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