SignalR Authorize 属性不适用于 cookie 身份验证

Question

我正在使用 AspNetCore 和 cookie 中间件进行身份验证，我这样设置...

app.UseCookieAuthentication(new CookieAuthenticationOptions
{
    AuthenticationScheme = Constants.AuthenticationScheme,
    AutomaticAuthenticate = true,
    AutomaticChallenge = true,
    LoginPath = new PathString("/")
});

我使用登录表单成功进行身份验证，然后重定向到标有 [Authorize] 属性的控制器。

控制器然后加载一个页面，该页面具有连接到集线器的 javascript signalR 客户端。

但是，当我添加 signalR [Authorize] 属性时。我从服务器收到 401 Unauthorized。

如何让 signalR 识别身份验证 cookie？我可以看到它已经通过了Context.RequestCookies中的cookie。

如果我无法手动解密 cookie 并自己设置用户？

Answer 1

我设法通过自己解密 cookie 来解决这个问题，但是我会对更好的方法非常感兴趣。

在Question 的帮助下，我创建了一个帮助类来生成身份验证票证格式

public static class SecurityHelper
{
    /// <summary>
    /// Gets the format for the security cookie used to encrypt and decrpyt cookie
    /// </summary>
    /// <param name="services">The app service provider</param>
    /// <returns>The authentication ticket format</returns>
    public static ISecureDataFormat<AuthenticationTicket> GetTicketFormat(IServiceProvider services)
    {
        var authenticationType = "Cookies";
        var protectionProvider = services.GetRequiredService<IDataProtectionProvider>();
        var dataProtector = protectionProvider.CreateProtector("Microsoft.AspNetCore.Authentication.Cookies.CookieAuthenticationMiddleware", authenticationType, "v2");
        return new TicketDataFormat(dataProtector);
    }
}

并告诉 cookie 中间件在我的 startup.cs 类中使用这种票证格式...

app.UseCookieAuthentication(new CookieAuthenticationOptions
{
            AuthenticationScheme = "Cookies",
            AutomaticAuthenticate = true,
            AutomaticChallenge = true,
            LoginPath = new PathString("/"),
            TicketDataFormat = SecurityHelper.GetTicketFormat(app.ApplicationServices)
});

然后在this文章的帮助下创建了我自己的signalr身份验证属性来解密cookie并设置用户主体。

/// <summary>
/// Attribute to have signalr hubs authenticate
/// </summary>
[AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = false)]
public class AuthorizeHubUsersAttribute :  AuthorizeAttribute
{
    /// <summary>
    /// Decrpyt the authentication cookie and set the user principal
    /// </summary>
    /// <param name="hubDescriptor">The hub descriptor</param>
    /// <param name="request">The request object</param>
    /// <returns>If the user is aythenticated</returns>
    public override bool AuthorizeHubConnection(HubDescriptor hubDescriptor, HttpRequest request)
    {
        var cookie = request.Cookies[".AspNetCore.Cookies"];
        var ticketFormat = SecurityHelper.GetTicketFormat(request.HttpContext.RequestServices);
        var authenticationTicket = ticketFormat.Unprotect(cookie);
        request.HttpContext.User = authenticationTicket.Principal; 

        return base.AuthorizeHubConnection(hubDescriptor, request);
    }

    /// <summary>
    /// Check the user is authenticated
    /// </summary>
    /// <param name="user">The user principal</param>
    /// <returns>If the user is aythenticated</returns>
    protected override bool UserAuthorized(IPrincipal user)
    {
        if (user?.Identity == null)
        {
            return false;
        }
        return user.Identity.IsAuthenticated;
    }
}

然后我要做的就是用属性装饰我的中心类

[AuthorizeHubUsersAttribute()]
public class GameMessageHub : Hub<IGameMessageHub> {
 ....
}

我找不到将依赖项注入到信号器属性中的方法，但如果有人知道的话，我想知道。