Adding claims to IdentityServer setup by AddIdentityServer - asp.net-core

I have a SPA that has an ASP.NET Core web API together with the inbuilt identity server switched on using AddIdentityServer and then AddIdentityServerJwt:
services.AddIdentityServer()
.AddApiAuthorization<User, UserDataContext>();
services.AddAuthentication()
.AddIdentityServerJwt();
I also have an authorization policy setup that requires an "Admin" role claim:
services.AddAuthorization(options =>
{
options.AddPolicy("IsAdmin", policy => policy.RequireClaim(ClaimTypes.Role, "Admin"));
});
I have a controller action that uses this policy
[Authorize(Policy = "IsAdmin")]
[HttpDelete("{id}")]
public IActionResult Deleten(int id)
{
...
}
The authenticated user does have the "Admin" role claim:
The access token for this authentication user doesn't appear to contain the admin claim:
I get a 403 back when trying to request this resource with the admin user:
So, if I'm understanding this correctly, IdentityServer isn't including the admin role claim and so the user isn't authorized to access the resource.
Is it possible to configure the claims that IdentityServer uses using AddIdentityServerJwt? or am I misunderstanding why this is not working.

One of the other answers is really close to the specific use case in question but misses the point about it being SPA.
Firstly you must add your IProfileService implementation like suggested already:
public class MyProfileService : IProfileService
{
public MyProfileService()
{ }
public Task GetProfileDataAsync(ProfileDataRequestContext context)
{
//get role claims from ClaimsPrincipal
var roleClaims = context.Subject.FindAll(JwtClaimTypes.Role);
//add your role claims
context.IssuedClaims.AddRange(roleClaims);
return Task.CompletedTask;
}
public Task IsActiveAsync(IsActiveContext context)
{
// await base.IsActiveAsync(context);
return Task.CompletedTask;
}
}
But then go ahead and do this:
services.AddIdentityServer()
.AddApiAuthorization<ApplicationUser, ApplicationDbContext>()
.AddProfileService<MyProfileService>();
And your claim will be exposed on the JWT. Replace the ClaimTypes.Role constant with any string corresponding to the claim type you want to expose.

On Identity Server side , you can create Profile Service to make IDS4 include role claim when issuing tokens .
You can get role claims from ClaimsPrincipal or get the roles from database and create profile service like :
public class MyProfileService : IProfileService
{
public MyProfileService()
{ }
public Task GetProfileDataAsync(ProfileDataRequestContext context)
{
//get role claims from ClaimsPrincipal
var roleClaims = context.Subject.FindAll(JwtClaimTypes.Role);
//add your role claims
context.IssuedClaims.AddRange(roleClaims);
return Task.CompletedTask;
}
public Task IsActiveAsync(IsActiveContext context)
{
// await base.IsActiveAsync(context);
return Task.CompletedTask;
}
}
And register in Startup.cs:
services.AddTransient<IProfileService, MyProfileService>();
On client side , you should map the role claim from your JWT Token and try below config in AddOpenIdConnect middleware :
options.ClaimActions.MapJsonKey("role", "role", "role");
options.TokenValidationParameters.RoleClaimType = "role";
Then your api could validate the access token and authorize with role policy .

I did this without using roles but with using a special claim added to the users token. I have created a CustomUserClaimsPrincipalFactory this allows me to add additional claims to the user.
register
services.AddScoped<IUserClaimsPrincipalFactory<ApplicationUser>, CustomUserClaimsPrincipalFactory>();
the code.
public class CustomUserClaimsPrincipalFactory : UserClaimsPrincipalFactory<ApplicationUser, IdentityRole<long>>
{
public CustomUserClaimsPrincipalFactory(
UserManager<ApplicationUser> userManager,
RoleManager<IdentityRole<long>> roleManager,
IOptions<IdentityOptions> optionsAccessor)
: base(userManager, roleManager, optionsAccessor)
{
}
protected override async Task<ClaimsIdentity> GenerateClaimsAsync(ApplicationUser user)
{
var userId = await UserManager.GetUserIdAsync(user);
var userName = await UserManager.GetUserNameAsync(user);
var id = new ClaimsIdentity("Identity.Application",
Options.ClaimsIdentity.UserNameClaimType,
Options.ClaimsIdentity.RoleClaimType);
id.AddClaim(new Claim(Options.ClaimsIdentity.UserIdClaimType, userId));
id.AddClaim(new Claim(Options.ClaimsIdentity.UserNameClaimType, user.Name));
id.AddClaim(new Claim("preferred_username", userName));
id.AddClaim(new Claim("culture", user.Culture ?? "da-DK"));
if (UserManager.SupportsUserSecurityStamp)
{
id.AddClaim(new Claim(Options.ClaimsIdentity.SecurityStampClaimType,
await UserManager.GetSecurityStampAsync(user)));
}
if (UserManager.SupportsUserClaim)
{
id.AddClaims(await UserManager.GetClaimsAsync(user));
}
if(user.IsXenaSupporter)
id.AddClaim(new Claim("supporter", user.Id.ToString()));
return id;
}
}
policy
services.AddAuthorization(options =>
{
options.AddPolicy("Supporter", policy => policy.RequireClaim("supporter"));
});
usage
[Authorize(AuthenticationSchemes = "Bearer", Policy = "Supporter")]
[HttpPost("supporter")]
public async Task<ActionResult> ChangeToSpecificUser([FromBody] ChangeUserRequest request)
{
// ..................
}

Related

Add Role in Identity Core Token Response for ASP.NET Core SPA Template

So I'm using the ASP.NET Core React Template with built-in authorization. In that template, everything is working and I'm able to login and register an account via this
services.AddDefaultIdentity<ApplicationUser>(options => options.SignIn.RequireConfirmedAccount = true)
.AddRoles<IdentityRole>()
.AddEntityFrameworkStores<ApplicationDbContext>();
services.AddIdentityServer()
.AddApiAuthorization<ApplicationUser, ApplicationDbContext>();
services.AddAuthentication()
.AddIdentityServerJwt();
When I view the token via application localstorage, I get the following data. Without the role.
I also viewed the access token via jwt.io
My question is, how can I add the role there or the role in the jwt token?
Thank you!
You need to create a ProfileService which implements IProfileService interface
I share you code from my project
public class ProfileService : IProfileService
{
protected UserManager<ApplicationUser> UserManager;
public ProfileService(UserManager<ApplicationUser> userManager)
{
UserManager = userManager;
}
public async Task GetProfileDataAsync(ProfileDataRequestContext context)
{
ApplicationUser user = await UserManager.GetUserAsync(context.Subject);
IList<string> roles = await UserManager.GetRolesAsync(user);
var claims = new List<Claim> {
// here you can include other properties such as id, email, address, etc. as part of the jwt claim types
new Claim(JwtClaimTypes.Email, user.Email),
new Claim(JwtClaimTypes.Name, $"{user.Firstname} {user.Lastname}")
};
foreach (string role in roles)
{
// include the roles
claims.Add(new Claim(JwtClaimTypes.Role, role));
}
context.IssuedClaims.AddRange(claims);
}
public Task IsActiveAsync(IsActiveContext context)
{
return Task.CompletedTask;
}
}
Add DI registration to Startup
services.AddTransient<IProfileService, ProfileService>();
Details in IdentityServer4 documentation

Create Role-Based Authorization with Windows Authentication

I have an ASP.NET Core application where I want to add role-based authentication. I'm using Windows Authentication because it's an intranet app. I already have a custom database that contains the users/roles that frankly doesn't map to the fields in the IdentityFramework. I can easily get the logged-in user's name via the Context.User.Identity.Name. I then want to look up the user in the custom user/roles table in order to get the available roles for that user. Then I want to use an annotation-based authentication filter decorated at the Controller or Action method level. For example, [Authorize(roles="admin")].
I was able to get this working by turning off Windows Authentication and using Forms Authentication with Cookies. In the AccountController I ran code like this:
using(LDAPConnection connection = new LDAPConnection(loginModel.UserName,loginModel.Password))
{
List<Claim> claims = new List<Claim> {
new Claim(ClaimTypes.Name, loginModel.UserName),
new Claim(ClaimTypes.Role, "admin")
};
ClaimsIdentity userIdentity = new ClaimsIdentity(claims,"login");
ClaimsPrincipal principal = new ClaimsPrincipal(userIdentity);
await HttpContext.SignInAsync(
CookieAuthenticationDefaults.AuthenticationScheme,
new ClaimsPrincipal(principal),
new AuthenticationProperties
{
IsPersistent = true,
ExpiresUtc = DateTime.Now.AddDays(200)
});
return Redirect("/");
}
I would then store the claims in a cookie. Then when I decorate the Controller with [Authorize(roles="admin")], I'm able to retrieve the View without issues. The authorization works. I would like to replicate this same functionality for WindowsAuthentication without logging the user in. I have tried using a ClaimsTransformer and implementing Policy-based authorization, which works. But if I decorate it with [Authorize(roles="admin")] it bombs when I navigate to the action method. Here is the ClaimsTransformer:
public Task<ClaimsPrincipal> TransformAsync(ClaimsPrincipal principal)
{
var identity = (ClaimsIdentity)principal.Identity;
List<Claim> claims = new List<Claim> {
new Claim(ClaimTypes.Name, identity.Name),
new Claim(ClaimTypes.Role, "admin")
};
identity.AddClaims(claims);
return Task.FromResult(principal);
}
What piece am I missing in order to use the [Authorize(Roles="admin")] working? BTW, I'm currently using ASP.NET Core 2.2.
You could write a custom Policy Authorization handlers in which you get all User's Roles and check if they contains your desired role name.
Refer to following steps:
1.Create CheckUserRoleRequirement(accept a parameter)
public class CheckUserRoleRequirement: IAuthorizationRequirement
{
public string RoleName { get; private set; }
public CheckUserRoleRequirement(string roleName)
{
RoleName = roleName;
}
}
2.Create CheckUserRoleHandler
public class CheckUserRoleHandler : AuthorizationHandler<CheckUserRoleRequirement>
{
private readonly IServiceProvider _serviceProvider;
public CheckUserRoleHandler(IServiceProvider serviceProvider)
{
_serviceProvider = serviceProvider;
}
protected override Task HandleRequirementAsync(AuthorizationHandlerContext context,
CheckUserRoleRequirement requirement)
{
var name = context.User.Identity.Name;
using (var scope = _serviceProvider.CreateScope())
{
var dbContext = scope.ServiceProvider.GetRequiredService<YourDbContext>();
//your logic to look up the user in the custom user/roles table in order to get the available roles for that user
List<string> roles = dbContext.UserRoles.Where(...;
if (roles != null && roles.Contains(requirement.RoleName))
{
context.Succeed(requirement);
}
}
return Task.CompletedTask;
}
}
3.Register Handler in ConfigureServices
services.AddAuthorization(options =>
{
options.AddPolicy("AdminRole", policy =>
policy.Requirements.Add(new CheckUserRoleRequirement("Admin")));
});
services.AddSingleton<IAuthorizationHandler, CheckUserRoleHandler>();
4.Usage
[Authorize(Policy = "AdminRole")]
I know this is a bit of a late answer, but I've been troubleshooting the same issue today and none of the answers I've seen on similar posts have fixed my issue.
Here are the steps I took to be able to use [Authorize(Roles = "Admin")] on my controller with Windows authentication.
Double check that UseAuthentication() comes before UseAuthorization() in the Configure() method of Startup.cs
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
app.UseHsts();
}
app.UseStaticFiles();
app.UseRouting();
app.UseAuthentication(); // <--- this needs to be before
app.UseAuthorization(); // <----this
app.UseEndpoints(endpoints =>
{
endpoints.MapControllerRoute(
name: "default",
pattern: "{controller=Hccc}/{action=Index}/");
});
}
Have a claims transformer to handle the necessary roles. For example,
public Task<ClaimsPrincipal> TransformAsync(ClaimsPrincipal principal)
{
var ci = (ClaimsIdentity)principal.Identity;
var user = UserAuth.GetUserRole(ci.Name); // gets my user from db with role
// handle your roles however you need.
foreach(var role in user.Roles)
{
var roleClaim = new Claim(ci.RoleClaimType, role.RoleName);
ci.AddClaim(roleClaim);
}
return Task.FromResult(principal);
}
Set up the ConfigureServices() method in Startup.cs to handle authorization
services.AddSingleton<IClaimsTransformation, ClaimsTransformer>();
// Implement a policy called "AdminOnly" that uses "Windows" authentication
// The policy requires Role "Admin"
services.AddAuthorization(options =>
{
options.AddPolicy("AdminOnly", policy =>
{
policy.AddAuthenticationSchemes("Windows");
policy.RequireRole("Admin");
});
});
services.AddMvc();
services.AddControllersWithViews();
Use the [Authorize] tag to implement the policy. For my case, I wanted to block access to a controller unless the user was an "Admin".
[Authorize(Policy = "AdminOnly")]
public class UsersController : Controller
{
}

Authorization .net core 2.0

I have setup cookie authentication in my asp.net core application. I have a login page where the credentials matchup against the active directory. All this works fine.
Now next I want to implement authorization in my application. I have a table of users together with permission against them. For example permission like Reading & Write. When the user is successfully authenticated I want to check for these permissions and show them certain functionality while restricting others. For example, show certain dropdowns for write permission while hiding for reading permission.
What is the best approach to handle this in the .NET Core.
I have read about adding policy like:
services.AddAuthorization(options => {
options.AddPolicy("Read", policy =>
policy.RequireClaim("Read", "MyCLaim"));
});
Then in my controller:
[Authorize(Policy = "Read")]
public class HomeController : Controller
{
}
Where do I get the permissions for logged in user from my database and how to verify if the user has those permissions or not.
Would appreciate inputs.
Where do I get the permissions for logged in user from my database and
how to verify if the user has those permissons or not.
Right after a user is authenticated, you collect user's claims, and store them in Authentication Cookie.
For example, SignInAsync method.
public async Task SignInAsync(User user, IList<string> roleNames)
{
var claims = new List<Claim>
{
new Claim(ClaimTypes.Sid, user.Id.ToString()),
new Claim(ClaimTypes.Name, user.UserName),
new Claim(ClaimTypes.GivenName, user.FirstName),
new Claim(ClaimTypes.Surname, user.LastName)
};
foreach (string roleName in roleNames)
{
claims.Add(new Claim(ClaimTypes.Role, roleName));
}
var identity = new ClaimsIdentity(claims, "local", "name", "role");
var principal = new ClaimsPrincipal(identity);
await _httpContextAccessor.HttpContext.SignInAsync(
CookieAuthenticationDefaults.AuthenticationScheme, principal);
}
FYI: It happens to be that I store them as Role claims. You do not have to follow that route, if you don't want.
You can then verify the policy inside Startup.cs.
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
...
// Set up policies from claims
// https://leastprivilege.com/2016/08/21/why-does-my-authorize-attribute-not-work/
services.AddAuthorization(options =>
{
options.AddPolicy(Constants.RoleNames.Administrator, policyBuilder =>
{
policyBuilder.RequireAuthenticatedUser()
.RequireAssertion(context => context.User.HasClaim(
ClaimTypes.Role, Constants.RoleNames.Administrator))
.Build();
});
});
...
}
}
Usage is same as what you have described.
[Authorize(Policy = "Read")]
public class HomeController : Controller
{
public IActionResult Index()
{
return View();
}
}

OpenIdConnect access_token size and accessing claims server side

I am trying to wrap my head around several concepts here but I don't want this question to be too broad - basically what we are trying to do is use role claims as permissions to lock down our API but I am finding that the access_token is becoming too big.
We are using OpenIddict and ASP.NET Identity 3 on the server side. We have implemented the default AspNetRoleClaims table to store our claims for each role - using them as permissions.
We lock down our API endpoints using custom policy based claims authorization as shown here:
Custom Policy Based Authorization
The main issue I am finding is that our access_token containing our claims is becoming very large. We are attempting to make the ClaimType and Value to be very small in the database to make the claims footprint smaller. We have a basic CRUD type permission scheme, so for each "module" or screen in our SPA client app, there are 4 permissions. The more modules we add to our application, the more the claims are growing in the access_token and our Authorization Bearer header is becoming very large. I am worried about this becoming not very scalable as the app grows.
So the claims are embedded in the access_token and when I hit my endpoint that is locked down with a custom Policy like this...
[Authorize(Policy="MyModuleCanRead")]
[HttpGet]
public IEnumerable<MyViewModel> Get()
I can then access my ASP.NET Identity User and User.Claims in the AuthorizationHandler.
Sorry in advance if this is an obvious question - but I am wondering - in order to get the Custom Policy Based Authorization to work - does it absolutely require the claims to be in either the id_token or the access_token in order to call the handler?
If I remove the claims from the access_token, then my AuthorizationHandler code does not get hit and I cannot access my endpoint that is locked down with my custom Policy.
I am wondering if it is possible to use a custom claims policy but have the actual code that checks for the Claims inside the Authorization handler, so that the claims are not passed with each HTTP request, but are fetched server side from the Authorization cookie or from the database.
* UPDATE *
Pintpoint's answer using Authorization handlers along with the comment on how to remove additional role claims from the cookie achieved just what I was looking for.
In case this helps anyone else - here is the code to override the UserClaimsPrincipalFactory and prevent the role claims from being written to the cookie. (I had many role claims as permissions and the cookie(s) and request headers were becoming too large)
public class AppClaimsPrincipalFactory : UserClaimsPrincipalFactory<ApplicationUser, IdentityRole>
{
public AppClaimsPrincipalFactory(UserManager<ApplicationUser> userManager, RoleManager<IdentityRole> roleManager, IOptions<IdentityOptions> optionsAccessor) : base(userManager, roleManager, optionsAccessor)
{
}
public override async Task<ClaimsPrincipal> CreateAsync(ApplicationUser user)
{
if (user == null)
{
throw new ArgumentNullException(nameof(user));
}
var userId = await UserManager.GetUserIdAsync(user);
var userName = await UserManager.GetUserNameAsync(user);
var id = new ClaimsIdentity(Options.Cookies.ApplicationCookieAuthenticationScheme,
Options.ClaimsIdentity.UserNameClaimType,
Options.ClaimsIdentity.RoleClaimType);
id.AddClaim(new Claim(Options.ClaimsIdentity.UserIdClaimType, userId));
id.AddClaim(new Claim(Options.ClaimsIdentity.UserNameClaimType, userName));
if (UserManager.SupportsUserSecurityStamp)
{
id.AddClaim(new Claim(Options.ClaimsIdentity.SecurityStampClaimType,
await UserManager.GetSecurityStampAsync(user)));
}
// code removed that adds the role claims
if (UserManager.SupportsUserClaim)
{
id.AddClaims(await UserManager.GetClaimsAsync(user));
}
return new ClaimsPrincipal(id);
}
}
I am wondering if it is possible to use a custom claims policy but have the actual code that checks for the Claims inside the Authorization handler, so that the claims are not passed with each HTTP request, but are fetched server side from the Authorization cookie or from the database.
It's definitely possible. Here's how you could do that:
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddScoped<IAuthorizationHandler, PermissionAuthorizationHandler>();
services.AddAuthorization(options =>
{
options.AddPolicy("Has-Edit-User-Profiles-Permission", builder =>
{
builder.RequirePermission("Edit-User-Profiles");
});
});
}
}
public class PermissionAuthorizationRequirement : IAuthorizationRequirement
{
public PermissionAuthorizationRequirement(string permission)
{
if (string.IsNullOrEmpty(permission))
{
throw new ArgumentException("The permission cannot be null or empty.", nameof(permission));
}
Permission = permission;
}
public string Permission { get; set; }
}
public class PermissionAuthorizationHandler :
AuthorizationHandler<PermissionAuthorizationRequirement>
{
private readonly UserManager<ApplicationUser> _userManager;
public PermissionAuthorizationHandler(UserManager<ApplicationUser> userManager)
{
if (userManager == null)
{
throw new ArgumentNullException(nameof(userManager));
}
_userManager = userManager;
}
protected override async Task HandleRequirementAsync(
AuthorizationHandlerContext context,
PermissionAuthorizationRequirement requirement)
{
if (context.User == null)
{
return;
}
var user = await _userManager.GetUserAsync(context.User);
if (user == null)
{
return;
}
// Use whatever API you need to ensure the user has the requested permission.
if (await _userManager.IsInRoleAsync(user, requirement.Permission))
{
context.Succeed(requirement);
}
}
}
public static class PermissionAuthorizationExtensions
{
public static AuthorizationPolicyBuilder RequirePermission(
this AuthorizationPolicyBuilder builder, string permission)
{
if (builder == null)
{
throw new ArgumentNullException(nameof(builder));
}
if (string.IsNullOrEmpty(permission))
{
throw new ArgumentException("The permission cannot be null or empty.", nameof(permission));
}
return builder.AddRequirements(new PermissionAuthorizationRequirement(permission));
}
}

ASP.NET Core Windows Authentication and Application Roles

I'm trying to create a fairly simple intranet application that will use Active Directory for authentication, and will use the AspNetRoles table to check if the user is in a certain application role. This app is just an in-house lottery where some users can create events/contests that other users can then submit an entry to the contest. I'm thinking of starting out with 2 basic roles:
Administrator - Can perform CRUD operations on "Event" or
"Contest" entities
Contestant - Can perform GET operations on
"Contest" entities, and can create new "Entry" entities.
Here's where I'm stuck: I've got Windows Authentication working in the sense that from a controller, I can do a User.Identity.Name and see my domain login name. Furthermore, I can verify that an account belongs to a domain group by doing User.IsInRole("Domain Users"). If I want to avoid creating new AD groups for each role in my application (let's say design changes down the road require additional roles), how can I use Authorization on controllers to check against Application Roles?
Here's an example controller I want to use:
[Route("api/[controller]")]
[Authorize(Roles = "Contestant")]
public class EventTypesController : Controller
{
private IRaffleRepository _repository;
private ILogger<EventTypesController> _logger;
public EventTypesController(IRaffleRepository repository, ILogger<EventTypesController> logger)
{
_repository = repository;
_logger = logger;
}
[HttpGet("")]
public IActionResult Get()
{
try
{
var results = _repository.GetAllEventTypes();
return Ok(Mapper.Map<IEnumerable<EventTypeViewModel>>(results));
}
catch (Exception ex)
{
_logger.LogError($"Failed to get all event types: {ex}");
return BadRequest("Error occurred");
}
}
}
In my Startup.cs, in ConfigureServices, I'm wiring up Identity as follows:
services.AddIdentity<RaffleUser, ApplicationRole>()
.AddEntityFrameworkStores<RaffleContext>();
My RaffleUser class is really just the default implementation of IdentityUser:
public class RaffleUser : IdentityUser
{
}
My ApplicationRole class is also just the default implementation of IdentityRole. I also tried seeding some data in a seed class:
if (!await _roleManager.RoleExistsAsync("Administrator"))
{
var adminRole = new ApplicationRole()
{
Name = "Administrator"
};
await _roleManager.CreateAsync(adminRole);
await _context.SaveChangesAsync();
}
if (await _userManager.FindByNameAsync("jmoor") == null)
{
using (var context = new PrincipalContext(ContextType.Domain))
{
var principal = UserPrincipal.FindByIdentity(context, "DOMAIN\\jmoor");
if (principal != null)
{
var user = new RaffleUser()
{
Email = principal.EmailAddress,
UserName = principal.SamAccountName
};
await _userManager.CreateAsync(user);
await _context.SaveChangesAsync();
var adminRole = await _roleManager.FindByNameAsync("Administrator");
if (adminRole != null)
{
await _userManager.AddToRoleAsync(user, adminRole.Name);
await _context.SaveChangesAsync();
}
}
}
}
The data makes it to the tables, but it just seems like at the controller level, I need to convert the authenticated user to an IdentityUser. Do I need some middleware class to do this for me? Would that be the best way to make authorization reusable on all controllers?
First, I ended up creating a custom ClaimsTransformer that returns a ClaimsPrincipal populated with UserClaims and RoleClaims (after refactoring my app, I decided to go with policy-based authorization, and the access claim can be added at either the role or user level):
public async Task<ClaimsPrincipal> TransformAsync(ClaimsTransformationContext context)
{
var identity = (ClaimsIdentity)context.Principal.Identity;
var userName = identity.Name;
if (userName != null)
{
var user = await _userManager.FindByLoginAsync("ActiveDirectory", userName);
if (user != null)
{
identity.AddClaims(await _userManager.GetClaimsAsync(user));
var roles = await _userManager.GetRolesAsync(user);
identity.AddClaims(await GetRoleClaims(roles));
}
}
return context.Principal;
}
private async Task<List<Claim>> GetRoleClaims(IList<string> roles)
{
List<Claim> allRoleClaims = new List<Claim>();
foreach (var role in roles)
{
var rmRole = await _roleManager.FindByNameAsync(role);
var claimsToAdd = await _roleManager.GetClaimsAsync(rmRole);
allRoleClaims.AddRange(claimsToAdd);
}
return allRoleClaims;
}
I wired that up in the Startup.cs:
services.AddScoped<IClaimsTransformer, Services.ClaimsTransformer>();
I also went with Policy-based authorization:
services.AddAuthorization(options =>
{
options.AddPolicy("Administrator", policy => policy.RequireClaim("AccessLevel", "Administrator"));
options.AddPolicy("Project Manager", policy => policy.RequireClaim("AccessLevel", "Project Manager"));
});
So, users or roles can have a claim set with a name of "AccessLevel" and a value specified. To finish everything off, I also created a custom UserManager that just populates the User object with additional details from ActiveDirectory during a CreateAsync.
You need to add a DefaultChallangeScheme to use Windows authentication. This is how i do, but if someone has a better solution i am all ears :)
I use the following setup in my current application.
services.AddIdentity<ApplicationUser, ApplicationRole>()
.AddEntityFrameworkStores<SecurityDbContext>()
.AddDefaultTokenProviders();
services.AddAuthentication(options =>
{
options.DefaultChallengeScheme = IISDefaults.AuthenticationScheme;
});
Then i put in my application claims in a transformer.
services.AddTransient<IClaimsTransformation, ClaimsTransformer>();
I hope this will get you in the right direction.