带有 Owin 身份验证的单声道

Question

我有一个 Owin 应用程序，我在 Mono 中运行，我正在尝试获得身份验证以在其上正常工作。不过，我使用了 this page as a start. I quickly realized that Owin Authentication uses some Windows specific libraries. This question 上的信息对此有一个解决方法，我认为这就足够了。不是。

以下代码抛出另一个问题中描述的异常（在问题描述之外的另一个地方（参见代码中的注释））。如果我试图注释掉一些东西来定位关于 Owin 管道的错误异常被抛出（因为依赖）。如果我注释掉足以删除第一个异常再次出现。

是否有人能够在 Mono 的 Owin 中成功设置身份验证（使用 AspNet Identity）？

启动

public void Configure(IAppBuilder app)
{
    // Add the AspNet Identity user manager to the Owin context
    app.CreatePerOwinContext<ApplicationUserManager>(ApplicationUserManager.Create);

    // This was the first line to fail, but adding the AesDataProtectorProvider as
    // described in the referred question fixed that
    app.UseCookieAuthentication(new CookieAuthenticationOptions
    {
        AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
        LoginPath = new PathString("/login"),
        Provider = new CookieAuthenticationProvider
        {
            OnValidateIdentity = SecurityStampValidator.OnValidateIdentity<ApplicationUserManager, ApplicationUser>(
                validateInterval: TimeSpan.FromMinutes(30),
                regenerateIdentity: (manager, user) => user.GenerateUserIdentityAsync(manager))
        },
        TicketDataFormat = new SecureDataFormat<AuthenticationTicket>(
            DataSerializers.Ticket,
            new AesDataProtectorProvider("myAuthKey"),
            TextEncodings.Base64)
    });

    // This causes an exception complaining that the Windows only assembly
    // DpapiDataProtector can't be loaded, as described in the referred question
    app.UseExternalSignInCookie(DefaultAuthenticationTypes.ExternalCookie);

    // Set up the custom middleware as described in the first link
    // Something inside this causes other exceptions.
    app.Use(typeof(AuthMiddleware), app, new AuthOptions());
}

AuthMiddleware

public class AuthMiddleware : AuthenticationMiddleware<AuthOptions>
{
    public AuthMiddleware(OwinMiddleware next, IAppBuilder app, AuthOptions options)
        : base(next, options)
    {
        if (string.IsNullOrEmpty(Options.SignInAsAuthenticationType))
        {
            options.SignInAsAuthenticationType = app.GetDefaultSignInAsAuthenticationType();
        }
        if (options.StateDataFormat == null)
        {
            var dataProtector = app.CreateDataProtector(typeof(AuthMiddleware).FullName,
            options.AuthenticationType);
            options.StateDataFormat = new PropertiesDataFormat(dataProtector);
        }
    }

    protected override AuthenticationHandler<AuthOptions> CreateHandler()
    {
        return new AuthHandler();
    }
}

AuthOptions

public class AuthOptions : AuthenticationOptions
{
    public AuthOptions()
        : base("MyApp")
    {
        Description.Caption = "MyApp";
        // Where to redirect requests if not authenticated
        CallbackPath = new PathString("/login");            AuthenticationMode = AuthenticationMode.Passive;
    }

    public PathString CallbackPath { get; set; }
    public string SignInAsAuthenticationType { get; set; }
    public ISecureDataFormat<AuthenticationProperties> StateDataFormat { get; set; }
}

AuthHandler

public class AuthHandler : AuthenticationHandler<AuthOptions>
{
    protected override Task<AuthenticationTicket> AuthenticateCoreAsync()
    {
        var identity = new ClaimsIdentity(Options.SignInAsAuthenticationType);
        var properties = Options.StateDataFormat.Unprotect(Request.Query["state"]);
        return Task.FromResult(new AuthenticationTicket(identity, properties));
    }

    protected override Task ApplyResponseChallengeAsync()
    {
        if (Response.StatusCode == 401)
        {
            var challenge = Helper.LookupChallenge(Options.AuthenticationType, Options.AuthenticationMode);
            if (challenge != null)
            {
                var state = challenge.Properties;
                if (string.IsNullOrEmpty(state.RedirectUri))
                {
                    state.RedirectUri = Request.Uri.ToString();
                }
                var stateString = Options.StateDataFormat.Protect(state);
                Response.Redirect(WebUtilities.AddQueryString(Options.CallbackPath.Value, "state", stateString));
            }
        }
        return Task.FromResult<object>(null);
    }

    public override async Task<bool> InvokeAsync()
    {
        Request.Environment.Add("Context", Context);

        // If user is not logged in and tries to access any page that is not in
        // the list of allowed pages, redirect to login page
        if (Context.Authentication.User == null && 
            !Request.Path.ToString().StartsWith("/login"))
        {
            Response.Redirect(Options.CallbackPath.Value);
            return true;
        }

        return false;
    }
}

Answer 1

GitHub 展示 Mono WebAPI、OAuth2 Bearer 令牌身份验证的存储库，AspNet.Identity + MySQL UserStore:

https://github.com/shturm/mono-webapi

需要弄清楚的几件事：

AspNet.Identity是一组接口（Microsoft.AspNet.Identity.Core）及其实现（ Microsoft.AspNet.Identity.EntityFramework/Owin) 大致描述了 用于在数据库中持久保存帐户的存储库模式。
AspNet.Identity不做authentication/authorization。它在处理密码的同时创建、保存、更新、删除用户。
AspNet.Identity主要类使用的是UserManager（来自Microsoft.AspNet.Identity.Core) 和 SignInManger（来自 Microsoft.AspNet.Identity.Owin). SignInManager 不需要执行任何类型的 OWIN 身份验证。
您发布的代码严格 Microsoft.Owin 相关，与 AspNet.Identity 无关，除了ApplicationUserManager，在 Visual Studio 模板中扩展了 Microsoft.AspNet.Identity.UserManager。

Answer 2

显然，上面提交的代码包含的内容超出了使 Owin 身份验证正常工作所必需的（并且不适用于 Mono）。在研究并尝试了很多排列之后，我相信我现在已经在工作状态下进行了身份验证。我不知道它是否一定是正确的条件，但只要它有效...

使用以下设置，未登录的用户只能访问允许页面列表中的页面（由 AuthHandler 中的方法 public override async Task<bool> InvokeAsync() 控制）。在登录页面上，我可以使用 ApplicationUserManager 来登录用户。登录后，可以访问 Owin 托管的所有页面。

启动

app.CreatePerOwinContext<ApplicationUserManager>(ApplicationUserManager.Create);

app.UseCookieAuthentication(new CookieAuthenticationOptions
{
    AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
    LoginPath = new PathString("/login"),
    Provider = new CookieAuthenticationProvider
    {
        OnValidateIdentity = SecurityStampValidator.OnValidateIdentity<ApplicationUserManager, ApplicationUser>(
            validateInterval: TimeSpan.FromMinutes(30),
            regenerateIdentity: (manager, user) => user.GenerateUserIdentityAsync(manager))
    },
    TicketDataFormat = new SecureDataFormat<AuthenticationTicket>(
        DataSerializers.Ticket,
        new AesDataProtectorProvider("myAuthKey"),
        TextEncodings.Base64)
});

app.Use(typeof(AuthMiddleware), app, new AuthOptions());

AuthMiddleware

public class AuthMiddleware : AuthenticationMiddleware<AuthOptions>
{
    public AuthMiddleware(OwinMiddleware next, IAppBuilder app, AuthOptions options)
        : base(next, options)
    {
        if (options.StateDataFormat == null)
        {
            options.StateDataFormat = new PropertiesDataFormat(new AesDataProtectorProvider("myAuthKey"));
        }
    }

    protected override AuthenticationHandler<AuthOptions> CreateHandler()
    {
        return new AuthHandler();
    }
}

AuthHandler

public class AuthHandler : AuthenticationHandler<AuthOptions>
{
    protected override Task<AuthenticationTicket> AuthenticateCoreAsync()
    {
        // This method never gets called in the current setup,
        // but it is required because the compilation fails otherwise.
        // Therefore only return an empty object.
        return Task.FromResult<AuthenticationTicket>(null);
    }

    protected override Task ApplyResponseChallengeAsync()
    {
        if (Response.StatusCode == 401)
        {
            var challenge = Helper.LookupChallenge(Options.AuthenticationType, Options.AuthenticationMode);
            if (challenge != null)
            {
                var state = challenge.Properties;
                if (string.IsNullOrEmpty(state.RedirectUri))
                {
                    state.RedirectUri = Request.Uri.ToString();
                }
                var stateString = Options.StateDataFormat.Protect(state);
                Response.Redirect(WebUtilities.AddQueryString(Options.CallbackPath.Value, "state", stateString));
            }
        }
        return Task.FromResult<object>(null);
    }

    public override async Task<bool> InvokeAsync()
    {
        // If user is not logged in and tries to access any page that is not in
        // the list of allowed pages, redirect to login page.
        // Add any additional pages not protected by authentication here
        if (Context.Authentication.User == null && 
            !Request.Path.ToString().StartsWith("/login"))
        {
            Response.Redirect(Options.CallbackPath.Value);
            return true;
        }

        return false;
    }
}

Answer 3

Owin 中的身份验证使用异步管道，但 Mono 不支持。

我为单声道发出拉取请求 https://github.com/mono/mono/pull/3048。它使异步 web 的同步执行 api 堆栈。

现在您可以通过此修复使用 Owin 身份验证。

Answer 4

我将留下一个与 OP 问题相关但未解决的答案，作为其他尚未跳转到 .NET Core 的人的资源。

在 Mono、Mod-Mono 和 Apache 上，我的经验是 regenerateIdentity 函数在 Mono 上失败，但是当运行从 VS 本地时会成功。

修复前 (startup.auth.cs)

app.UseCookieAuthentication(new CookieAuthenticationOptions
{
   AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
   LoginPath = new PathString("/Account/Login"),
   Provider = new CookieAuthenticationProvider
   {  
       OnValidateIdentity = SecurityStampValidator.OnValidateIdentity<ApplicationUserManager, ApplicationUser>(
           validateInterval: TimeSpan.FromMinutes(2),
           regenerateIdentity: (manager, user) => AuthenticationService.RefreshIdentityAsync(manager, user))
   }
});

我在 Chrome 的开发工具（应用程序选项卡）中注意到 cookie 保留了下来，因为它将在未来 2 周后到期。

我的解决方案是调整 cookie 的 'Expires' 时间，使其与验证间隔 对齐。现在客户端负责 cookie 驱逐，Mono 不必在重新生成时处理 cookie。我意识到这不是一个通用的修复程序，但对于许多人来说，我确信这已经足够好了。

修复后

app.UseCookieAuthentication(new CookieAuthenticationOptions
{
   AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
   LoginPath = new PathString("/Account/Login"),
   ExpireTimeSpan = TimeSpan.FromMinutes(2),
   SlidingExpiration = false,
   Provider = new CookieAuthenticationProvider
   {
       OnValidateIdentity = SecurityStampValidator.OnValidateIdentity<ApplicationUserManager, ApplicationUser>(
           validateInterval: TimeSpan.FromMinutes(2),
           regenerateIdentity: (manager, user) => AuthenticationService.RefreshIdentityAsync(manager, user))
   }
});

带有 Owin 身份验证的单声道

Mono with Owin Authentication

c#

authentication

mono

owin

asp.net-identity