我试图只允许角色为“全局管理员”的Azure Active Directory B2C用户访问以下类（这就是我添加Authorize命令的原因）：
[Authorize(Roles = "admin")]
public class UserProfileController : Controller
{
... controller class ...
}
我的Startup类看起来像这样：
public partial class Startup
{
private static string clientId = ConfigurationManager.AppSettings["ida:ClientId"];
private static string appKey = ConfigurationManager.AppSettings["ida:ClientSecret"];
private static string aadInstance = ConfigurationManager.AppSettings["ida:AADInstance"];
private static string tenantId = ConfigurationManager.AppSettings["ida:TenantId"];
private static string postLogoutRedirectUri = ConfigurationManager.AppSettings["ida:PostLogoutRedirectUri"];
// This is the resource ID of the AAD Graph API. We'll need this to request a token to call the Graph API.
private static string graphResourceId = "https://graph.microsoft.com";
private static readonly string Authority = aadInstance + tenantId;
public static GraphServiceClient graphClient = null;
public static GraphServiceClient GetGraphServiceClient()
{
return graphClient;
}
public void ConfigureAuth(IAppBuilder app)
{
app.SetDefaultSignInAsAuthenticationType(CookieAuthenticationDefaults.AuthenticationType);
app.UseCookieAuthentication(new CookieAuthenticationOptions()
{
CookieSecure = CookieSecureOption.Always
});
app.UseOpenIdConnectAuthentication(
new OpenIdConnectAuthenticationOptions
{
ClientId = clientId,
Authority = Authority,
PostLogoutRedirectUri = postLogoutRedirectUri,
Notifications = new OpenIdConnectAuthenticationNotifications()
{
// If there is a code in the OpenID Connect response, redeem it for an access token and refresh token, and store those away.
AuthorizationCodeReceived = (context) =>
{
var code = context.Code;
ClientCredential credential = new ClientCredential(clientId, appKey);
string signedInUserID = context.AuthenticationTicket.Identity.FindFirst(ClaimTypes.NameIdentifier).Value;
TokenCache userTokenCache = new ADALTokenCache(signedInUserID);
AuthenticationContext authContext = new AuthenticationContext(Authority, userTokenCache);
AuthenticationResult result = authContext.AcquireTokenByAuthorizationCode(
code, new Uri(HttpContext.Current.Request.Url.GetLeftPart(UriPartial.Path)), credential, graphResourceId);
string token = result.AccessToken;
try
{
graphClient = new GraphServiceClient(
new DelegateAuthenticationProvider(
(requestMessage) =>
{
requestMessage.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("bearer", token);
return Task.FromResult(0);
}));
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("Failed to create graph client: " + e.Message);
}
return Task.FromResult(0);
}
}
});
}
}
问题是：当我点击实例化UserProfileController的按钮时，AuthorizationCodeReceived = (context) =>代码行内的代码会在无限循环中再次被调用。如何我可以修复无限循环，以便只有Azure Active Directory B2C“全局管理员”可以实例化UserProfileController吗？
答案 0 :(得分：3)
[授权（角色=“管理员”）]
由于您使用Authorize属性来检查用户的角色，因此您需要确保当前用户的声明具有有效的角色声明。您可以利用以下代码段来检查您当前的用户声明：
return Json((User.Identity as ClaimsIdentity).Claims.Select(c => new { key = c.Type, value = c.Value }),JsonRequestBehavior.AllowGet);
问题是：当我点击实例化UserProfileController的按钮时，那么AuthorizationCodeReceived =（context）=＆gt;中的代码。在无限循环中一次又一次地调用代码行。
您可以覆盖AuthorizeAttribute下的HandleUnauthorizedRequest方法，并按如下方式定义自定义授权属性：
public class MyAuthorize : AuthorizeAttribute
{
protected override void HandleUnauthorizedRequest(System.Web.Mvc.AuthorizationContext filterContext)
{
filterContext.Result = new ContentResult() { Content = "You don't have rights to take actions" };
}
}
然后，您可以按如下方式装饰UserProfileController控制器：
[MyAuthorize(Roles = "admin")]
public class UserProfileController : Controller
{
//TODO:
}
我尝试仅允许角色为“全局管理员”的Azure Active Directory B2C用户访问以下类
在AuthorizationCodeReceived委托方法下，在检索访问令牌后，您需要利用Microsoft Graph Client库来检查当前用户是否是全局管理员/公司管理员或不。如果当前用户是全局管理员/公司管理员，则需要按如下方式指定角色声明：
context.AuthenticationTicket.Identity.AddClaim(new Claim(context.AuthenticationTicket.Identity.RoleClaimType, "admin"));
注意：要检查用户是否是全局管理员，您可以检索当前用户目录下的角色，然后使用getMemberObjects API检索组，角色是当前用户是其成员，然后检查全局管理员角色ID是否在当前用户的MemberObjects中。
//List directory roles, https://developer.microsoft.com/en-us/graph/docs/api-reference/v1.0/api/directoryrole_list
var roles=await graphClient.DirectoryRoles.Request().GetAsync();
//user: getMemberObjects ,https://developer.microsoft.com/en-us/graph/docs/api-reference/v1.0/api/user_getmemberobjects
<强>更新
我检查了我这方面的实施情况。以下是检查当前登录用户角色的代码。
var directoryRoles = await graphClient.DirectoryRoles.Request().GetAsync();
var userRoles = await graphClient.Me.MemberOf.Request().GetAsync();
var adminRole=directoryRoles.Where(role => role.DisplayName== "Company Administrator" || role.DisplayName == "Global Administrator").FirstOrDefault();
if (userRoles.Count(role => role.Id == adminRole.Id) > 0)
{
context.AuthenticationTicket.Identity.AddClaim(new Claim(context.AuthenticationTicket.Identity.RoleClaimType, "admin"));
}
else
{
context.AuthenticationTicket.Identity.AddClaim(new Claim(context.AuthenticationTicket.Identity.RoleClaimType, "user"));
}
注意：要添加多个用户角色，您可以添加多个new Claim(context.AuthenticationTicket.Identity.RoleClaimType, "<role-name>")角色声明。
以下是我修改后的自定义AuthorizeAttribute：
public class MyAuthorize : AuthorizeAttribute
{
private bool noPermission = false;
public string Permissions { get; set; }
protected override bool AuthorizeCore(HttpContextBase httpContext)
{
if (!base.AuthorizeCore(httpContext))
return false;
var permissionArrs = Permissions.Trim().Split('|');
if (permissionArrs.ToList().Exists(p=>httpContext.User.IsInRole(p)))
{
return true;
}
else
{
noPermission = true;
return false;
}
}
protected override void HandleUnauthorizedRequest(System.Web.Mvc.AuthorizationContext filterContext)
{
if (noPermission)
filterContext.Result = new ContentResult() { Content = "You don't have rights to take actions" };
else
base.HandleUnauthorizedRequest(filterContext);
}
}
按如下方式装饰UserProfileController：
[MyAuthorize(Permissions = "admin|co-admin")]
public class UsersController : Controller
{
//TODO:
}