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asp.net权限认证:OWIN实现OAuth 2.0 之授权码模式(Authorization Code)

授权码模式定义

通过客户端的后台服务器,与“服务提供商”的认证服务器进行认证。

1、用户访问客户端,后者将前者导向认证服务器。

2、用户选择是否给予客户端授权。

3、假设用户给予授权,认证服务器首先生成一个授权码,并返回给用户,认证服务器将用户导向客户端事先指定的"重定向URI"(redirection URI),同时附上一个授权码。

4、客户端收到授权码,附上早先的"重定向URI",向认证服务器申请令牌。这一步是在客户端的后台的服务器上完成的,对用户不可见。

5、认证服务器核对了授权码和重定向URI,确认无误后,向客户端发送访问令牌(access token)和更新令牌(refresh token)。

6、Client拿着access token去访问Resource资源

授权码模式的工作流程图

asp.net权限认证:OWIN实现OAuth 2.0 之授权码模式(Authorization Code)

图 1 (网上搜到的授权码工作流程图说明)

之前看上边的流程图,看了不下10遍,还是搞不懂,这个图真心画的不好理解!

我们一步步来,AuthorizationServer与ResourceServer还是用之前的项目

新建项目:AuthorizationCodeGrant

asp.net权限认证:OWIN实现OAuth 2.0 之授权码模式(Authorization Code)

HomeController.cs也简单

     public ActionResult Index()             {                 ViewBag.AccessToken = Request.Form["AccessToken"] ?? "";                 ViewBag.RefreshToken = Request.Form["RefreshToken"] ?? "";                 ViewBag.Action = "";                 ViewBag.ResourceResponse = "";                 var authorizationServerUri = new Uri("http://localhost:8270/");                 var authorizationServer = new AuthorizationServerDescription                 {                     AuthorizationEndpoint = new Uri(authorizationServerUri, "OAuth/Authorize"),                     TokenEndpoint = new Uri(authorizationServerUri, "OAuth/Token")                 };                 // 刷新AccessToken                 var client = new WebServerClient(authorizationServer, "123456", "abcdef");                 if (string.IsNullOrEmpty(ViewBag.AccessToken))                 {                     var authorizationState = client.ProcessUserAuthorization(Request);                     if (authorizationState != null)                     {                         ViewBag.AccessToken = authorizationState.AccessToken;                         ViewBag.RefreshToken = authorizationState.RefreshToken;                         ViewBag.Action = Request.Path;                     }                 }                 // 授权申请                 if (!string.IsNullOrEmpty(Request.Form.Get("btnRequestAuthorize")))                 {                     var grantRequest = client.PrepareRequestUserAuthorization(new[] { "scopes1", "scopes2" });                     grantRequest.Send(HttpContext);                     Response.End();                 }                 // 申请资源                 if (!string.IsNullOrEmpty(Request.Form.Get("btnRequestResource")))                 {                     var resourceServerUri = new Uri("http://localhost:8001/");                     var resourceRequest = new HttpClient(client.CreateAuthorizingHandler(ViewBag.AccessToken));                     ViewBag.ResourceResponse = resourceRequest.GetStringAsync(new Uri(resourceServerUri, "api/Values")).Result;                 }                 return View();             }      

Index.cshtml

<!DOCTYPE html>     <html xmlns="http://www.w3.org/1999/xhtml">     <head>         <title>Authorization Code Grant Client</title>     </head>     <body>         <form id="form1" action="@ViewBag.Action" method="POST">             <div>                 <input id="AccessToken" name="AccessToken" value="@ViewBag.AccessToken" type="hidden" />                 <input id="Authorize" name="btnRequestAuthorize" value="向认证服务器索要授权" type="submit" />                 <input id="Resource" name="btnRequestResource" value="访问资源(Resource)" type="submit" />             </div>             <div>@ViewBag.ResourceResponse</div>         </form>     </body>     </html>      

运行项目  

asp.net权限认证:OWIN实现OAuth 2.0 之授权码模式(Authorization Code)

授权过程

点击“向认证服务索要授权”,根据HomeController.cs文件的设置,页面预计会跳转到"http://localhost:8270/OAuth/Authorize"

所以我们需要在认证服务中新增处理授权码模式的处理逻辑

在项目AuthorizationServer中新增OAuthController.cs、Authorize.cshtml

   public class OAuthController : Controller         {             public ActionResult Authorize()             {                 if (Response.StatusCode != 200)                 {                     return View("AuthorizeError");                 }                 var authentication = HttpContext.GetOwinContext().Authentication;                 var ticket = authentication.AuthenticateAsync("Application").Result;                 var identity = ticket != null ? ticket.Identity : null;                 if (identity == null)                 {                     authentication.Challenge("Application");                     return new HttpUnauthorizedResult(); //用户登录凭证失效就报401错误,并且跳转至AccountController中的Login中                 }                 ViewBag.IdentityName = identity.Name;                 ViewBag.Scopes = (Request.QueryString.Get("scope") ?? "").Split(' ');                 if (Request.HttpMethod == "POST")                 {               // 点击btnGrant就确认授权,返回token等信息                     if (!string.IsNullOrEmpty(Request.Form.Get("btnGrant")))                     {                         identity = new ClaimsIdentity(identity.Claims, "Bearer", identity.NameClaimType, identity.RoleClaimType);                         foreach (var scope in ViewBag.Scopes)                         {                             identity.AddClaim(new Claim("urn:oauth:scope", scope));                         }                         authentication.SignIn(identity);                     }                     if (!string.IsNullOrEmpty(Request.Form.Get("btnOtherLogin")))                     {                         authentication.SignOut("Application");                         authentication.Challenge("Application");                         return new HttpUnauthorizedResult();                     }                 }                 return View();             }         }      
<!DOCTYPE html>     <html xmlns="http://www.w3.org/1999/xhtml">     <head>         <title>Authorize</title>     </head>     <body>         <h1>认证页面</h1>         <form method="POST">             <p>登录用户:@ViewBag.IdentityName</p>             <p>第三方应用需要你给他开放以下权限</p>             <ul>                 @foreach (var scope in ViewBag.Scopes)                 {                     <li>@scope</li>                 }             </ul>             <p>                 <input type="submit" name="btnGrant" value="确认授权" />                 <input type="submit" name="btnOtherLogin" value="以不同用户登录" />             </p>         </form>     </body>     </html>      
   public class AccountController : Controller         {             public ActionResult Login()             {                 var authentication = HttpContext.GetOwinContext().Authentication;                 if (Request.HttpMethod == "POST")                 {                     // 默认用户登录成功              // 生产环境需要单独整合第三方登录信息                     var username = Request.Form["username"];                     authentication.SignIn(                         new AuthenticationProperties { IsPersistent = true },                         new ClaimsIdentity(                             new[] { new Claim(ClaimsIdentity.DefaultNameClaimType, username) }, "Application"));                 }                 return View();             }             public ActionResult Logout()             {                 return View();             }         }      

运行项目,成功跳转至认证登录页面

asp.net权限认证:OWIN实现OAuth 2.0 之授权码模式(Authorization Code)

点击登录,此时url地址为:

http://localhost:8270/OAuth/Authorize?client_id=123456&redirect_uri=http%3A%2F%2Flocalhost%3A4825%2F&state=IUKeWFTR1HKi4hlzKOOPgw&scope=scopes1%20scopes2&response_type=code

7.1 client_id为客户端ID,即之前我们在AuthorizationCodeGrant项目设置的clientID

7.2 redirect_uri、state为之前登录时就确定的值

7.3 scope为用户确定授权的范围

7.4 response_type=code,即指定为授权码模式

asp.net权限认证:OWIN实现OAuth 2.0 之授权码模式(Authorization Code)

确认授权

此时url有变化:http://localhost:4825/?code=efab38fc30c741a198b20663ec60869a36c6b25ff21f4c9986bcb9c9ae8d20eb&state=tjB9jXhNiHvIr4Ko9VhEkw

asp.net权限认证:OWIN实现OAuth 2.0 之授权码模式(Authorization Code)

注意:这一步会会默认获取Token

asp.net权限认证:OWIN实现OAuth 2.0 之授权码模式(Authorization Code)
asp.net权限认证:OWIN实现OAuth 2.0 之授权码模式(Authorization Code)

点击访问资源

asp.net权限认证:OWIN实现OAuth 2.0 之授权码模式(Authorization Code)

完全能够对上;

url中的code即认证服务返回的授权码,之后Client请求Token会用这个code来交换

这个就是授权码模式的特色的地方了

asp.net权限认证:OWIN实现OAuth 2.0 之授权码模式(Authorization Code)

 自此,整个授权码模式已经完毕了哦

asp.net权限认证系列

  1. asp.net权限认证:Forms认证
  2. asp.net权限认证:HTTP基本认证(http basic)
  3. asp.net权限认证:Windows认证
  4. asp.net权限认证:摘要认证(digest authentication)
  5. asp.net权限认证:OWIN实现OAuth 2.0 之客户端模式(Client Credential)
  6. asp.net权限认证:OWIN实现OAuth 2.0 之密码模式(Resource Owner Password Credential)
  7. asp.net权限认证:OWIN实现OAuth 2.0 之授权码模式(Authorization Code)
  8. asp.net权限认证:OWIN实现OAuth 2.0 之简化模式(Implicit)

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