oauth - MVC 5应用程序-实现OAuth授权代码流程

Question

基于本教程 http://www.asp.net/aspnet/overview/owin-and-katana/owin-oauth-20-authorization-server ，我创建了一个授权服务器、一个资源服务器和一个MVC客户端。MVC 客户端有一个 Controller ，它从资源服务器获取一些数据。资源服务器需要身份验证。 MVC 客户端从授权服务器获取授权码，并将用户重定向到授权服务器进行身份验证。最后，MVC 客户端将授权代码交换为访问 token 以访问资源服务器。这是 OAuth 2 协议(protocol)描述的授权代码流。这工作得很好。

现在，我需要使 MVC 客户端的 Controller 本身需要身份验证。我找不到这方面的教程。

我添加了

app.UseOAuthBearerAuthentication(new OAuthBearerAuthenticationOptions());

到我的 Startup.Auth.cs。我想，我需要设置重定向到授权服务器的选项。我还可以在选项上设置提供程序:

app.UseOAuthBearerAuthentication(new Microsoft.Owin.Security.OAuth.OAuthBearerAuthenticationOptions()
{
    Provider = new OAuthBearerAuthenticationProvider()
});

但我也坚持实现提供者的事件。有人能引导我走向正确的方向吗？或者有什么教程可以帮助我吗？

Answer 1

我最终根据 Brock Allen 的这两篇文章找到了一个解决方案:

• http://brockallen.com/2013/10/24/a-primer-on-owin-cookie-authentication-middleware-for-the-asp-net-developer/
• http://brockallen.com/2014/01/09/a-primer-on-external-login-providers-social-logins-with-owinkatana-authentication-middleware/

基本思想是注册两个身份验证中间件。主动 Cookie 身份验证和被动 OAuthBearer 身份验证。在 Startup.Auth.cs 中，它们的添加方式如下:

app.UseCookieAuthentication(new CookieAuthenticationOptions()
{
    AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
    LoginPath = new PathString("/ExternalLogin/Login"),
});
app.UseOAuthBearerAuthentication(new OAuthBearerAuthenticationOptions()
{
    AuthenticationType = DefaultAuthenticationTypes.ExternalBearer,
    AuthenticationMode = Microsoft.Owin.Security.AuthenticationMode.Passive,
});

您还添加了一个ExternalLogin-Controller。它的登录方法必须将用户重定向到授权服务器的登录页面以获取授权码。您必须提供一个回调函数，用于处理授权代码。

public async Task<ActionResult> Login(string returnUrl)
{
    if (string.IsNullOrEmpty(returnUrl) && Request.UrlReferrer != null)
        returnUrl = Server.UrlEncode(Request.UrlReferrer.PathAndQuery);

    if (Url.IsLocalUrl(returnUrl) && !string.IsNullOrEmpty(returnUrl))
        _returnUrl = returnUrl;

    //callback function
    _redirectUrl = Url.Action("AuthorizationCodeCallback", "ExternalLogin", null, Request.Url.Scheme);

    Dictionary<string, string> authorizeArgs = null;
    authorizeArgs = new Dictionary<string, string>
    {
        {"client_id", "0123456789"}
        ,{"response_type", "code"}
        ,{"scope", "read"}
        ,{"redirect_uri", _redirectUrl}
        // optional: state
    };

    var content = new FormUrlEncodedContent(authorizeArgs);
    var contentAsString = await content.ReadAsStringAsync();
    return Redirect("http://localhost:64426/oauth/authorize?" + contentAsString);
}

在您的回调函数中，您将授权代码交换为访问 token (加上刷新 token )，挑战您的被动 OAuthBearer 身份验证中间件，并使用访问 token 作为您的 Cookie 进行登录。

public async Task<ActionResult> AuthorizationCodeCallback()
{
    // received authorization code from authorization server
    string[] codes = Request.Params.GetValues("code");
    var authorizationCode = "";
    if (codes.Length > 0)
        authorizationCode = codes[0];

    // exchange authorization code at authorization server for an access and refresh token
    Dictionary<string, string> post = null;
    post = new Dictionary<string, string>
    {
        {"client_id", "0123456789"}
        ,{"client_secret", "ClientSecret"}
        ,{"grant_type", "authorization_code"}
        ,{"code", authorizationCode}
        ,{"redirect_uri", _redirectUrl}
    };

    var client = new HttpClient();
    var postContent = new FormUrlEncodedContent(post);
    var response = await client.PostAsync("http://localhost:64426/token", postContent);
    var content = await response.Content.ReadAsStringAsync();

    // received tokens from authorization server
    var json = JObject.Parse(content);
    _accessToken = json["access_token"].ToString();
    _authorizationScheme = json["token_type"].ToString();
    _expiresIn = json["expires_in"].ToString();
    if (json["refresh_token"] != null)
        _refreshToken = json["refresh_token"].ToString();

    //SignIn with Token, SignOut and create new identity for SignIn
    Request.Headers.Add("Authorization", _authorizationScheme + " " + _accessToken);
    var ctx = Request.GetOwinContext();
    var authenticateResult = await ctx.Authentication.AuthenticateAsync(DefaultAuthenticationTypes.ExternalBearer);
    ctx.Authentication.SignOut(DefaultAuthenticationTypes.ExternalBearer);
    var applicationCookieIdentity = new ClaimsIdentity(authenticateResult.Identity.Claims, DefaultAuthenticationTypes.ApplicationCookie);
    ctx.Authentication.SignIn(applicationCookieIdentity);

    var ctxUser = ctx.Authentication.User;
    var user = Request.RequestContext.HttpContext.User;

    //redirect back to the view which required authentication
    string decodedUrl = "";
    if (!string.IsNullOrEmpty(_returnUrl))
        decodedUrl = Server.UrlDecode(_returnUrl);

    if (Url.IsLocalUrl(decodedUrl))
        return Redirect(decodedUrl);
    else
        return RedirectToAction("Index", "Home");
}

我希望这对于在 MVC 5 应用程序中实现 OAuth 授权代码流程的人有用。