We Keep Coding

Saving settings/variables/permissions in memory instead of looking them up on each API call?

I have an API set up that allows placing orders, looking up product info, reporting, etc. Each API key has specific permissions on which controllers/methods they can or can't access, as well as fields that should be omitted. Unfortunately right now I have this hardcoded in a dictionary class and would like to instead pull these permissions from a database.
The problem is I don't want to call the database to lookup permissions every time a method is called to avoid a performance hit. Is there a way to POST these settings/permissions any time there's a change (using an admin page) and have the API "remember" them in memory in some sort of dictionary? Also when restarting the API I'm guessing these are cleared so I would need a way to pull this information when the API initializes. Not sure what the best way to design this is, any suggestions are helpful thanks.

can't you just use standard roles based authorization?
this is what I followed when I set mine up https://weblog.west-wind.com/posts/2021/Mar/09/Role-based-JWT-Tokens-in-ASPNET-Core
[Authorize(Roles = "admin")]
[HttpPost]
public async Task<IActionResult> Post(RoomDelegate roomDelegate) =>
HandleResult(await Mediator.Send(new Post.Command { RoomDelegate = roomDelegate }));
store your roles in the tokens claims.
public class TokenService
{
private readonly IConfiguration _config;
private readonly UserManager<AppUser> _userManager;
public TokenService(IConfiguration config, UserManager<AppUser> userManager)
{
_config = config;
_userManager = userManager;
}
public IConfiguration Config { get; }
public async Task<string> CreateToken(AppUser user)
{
var claims = new List<Claim>
{
new Claim(ClaimTypes.Name, user.UserName ),
new Claim(ClaimTypes.NameIdentifier, user.Id),
new Claim(ClaimTypes.Email, user.Email),
};
var roles = await _userManager.GetRolesAsync(user);
foreach (var role in roles)
{
claims.Add(new Claim(ClaimTypes.Role, role));
}
var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_config["TokenKey"]));
var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha512Signature);
var tokenDescription = new SecurityTokenDescriptor
{
Subject = new ClaimsIdentity(claims),
Expires = DateTime.UtcNow.AddMinutes(10),
SigningCredentials = creds
};
var tokenHandler = new JwtSecurityTokenHandler();
var token = tokenHandler.CreateToken(tokenDescription);
return tokenHandler.WriteToken(token);
}
public RefreshToken GenerateRefreshToken()
{
var randomNumber = new byte[32];
using var rng = RandomNumberGenerator.Create();
rng.GetBytes(randomNumber);
return new RefreshToken { Token = Convert.ToBase64String(randomNumber) };
}
}

Azure MSAL Authentication and custom JWT Authentication in Blazor

I'm trying to add Azure MSAL Authentication to an existing Blazor WASM application that already handles authentication with JWT.
But if I register a custom AuthenticationStateProvider I use, blazor throw at runtime:
Unhandled exception rendering component: Specified cast is not valid.
System.InvalidCastException: Specified cast is not valid.
Looking through sources, It seems it throws because an MSAL class expects that IServiceProvider returns an IRemoteAuthenticationService<TRemoteAuthenticationState> as AuthenticationStateProvider see WebAssemblyAuthenticationServiceCollectionExtensions at line 65
That's the AuthenticationStateProvider implementation I use:
public class ApiAuthenticationStateProvider : AuthenticationStateProvider
{
private readonly HttpClient _httpClient;
private readonly ILocalStorageService _localStorage;
public ApiAuthenticationStateProvider(AuthenticationHttpClient authHttpClient, ILocalStorageService localStorage)
{
_httpClient = authHttpClient.HttpClient;
_localStorage = localStorage;
}
public override async Task<AuthenticationState> GetAuthenticationStateAsync()
{
var savedToken = await _localStorage.GetItemAsync<string>("authToken");
if (string.IsNullOrWhiteSpace(savedToken))
{
return new AuthenticationState(new ClaimsPrincipal(new ClaimsIdentity()));
}
_httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("bearer", savedToken);
return new AuthenticationState(new ClaimsPrincipal(new ClaimsIdentity(ParseClaimsFromJwt(savedToken), "jwt")));
}
public void MarkUserAsAuthenticated(string email)
{
var authenticatedUser = new ClaimsPrincipal(new ClaimsIdentity(new[] { new Claim(ClaimTypes.Name, email) }, "apiauth"));
var authState = Task.FromResult(new AuthenticationState(authenticatedUser));
NotifyAuthenticationStateChanged(authState);
}
public void MarkUserAsLoggedOut()
{
var anonymousUser = new ClaimsPrincipal(new ClaimsIdentity());
var authState = Task.FromResult(new AuthenticationState(anonymousUser));
NotifyAuthenticationStateChanged(authState);
}
private IEnumerable<Claim> ParseClaimsFromJwt(string jwt)
{
var claims = new List<Claim>();
var payload = jwt.Split('.')[1];
var jsonBytes = ParseBase64WithoutPadding(payload);
var keyValuePairs = JsonSerializer.Deserialize<Dictionary<string, object>>(jsonBytes);
keyValuePairs.TryGetValue(ClaimTypes.Role, out object roles);
if (roles != null)
{
if (roles.ToString().Trim().StartsWith("["))
{
var parsedRoles = JsonSerializer.Deserialize<string[]>(roles.ToString());
foreach (var parsedRole in parsedRoles)
{
claims.Add(new Claim(ClaimTypes.Role, parsedRole));
}
}
else
{
claims.Add(new Claim(ClaimTypes.Role, roles.ToString()));
}
keyValuePairs.Remove(ClaimTypes.Role);
}
claims.AddRange(keyValuePairs.Select(kvp => new Claim(kvp.Key, kvp.Value.ToString())));
return claims;
}
private byte[] ParseBase64WithoutPadding(string base64)
{
switch (base64.Length % 4)
{
case 2: base64 += "=="; break;
case 3: base64 += "="; break;
}
return Convert.FromBase64String(base64);
}
}
Which I register as follows: builder.Services.AddScoped<AuthenticationStateProvider, ApiAuthenticationStateProvider>();
Is there a way to solve the issue ? I've looked at this other SO question but I'm not been able to solve.

While using AuthenticationStateProvider one of the appropriate System.Security.Claims.AuthenticationTypes values must be added as a parameter along with claimsIdentity.
i.e; To you blazor app you will have to add authenticationType parameter value with ClaimsIdentity so your code will be changed to:
like
var authenticatedUser = new ClaimsPrincipal(new ClaimsIdentity(claims, "Needs Auth Type Here"));
example:
public class ApiAuthenticationStateProvider : AuthenticationStateProvider
{
public override Task<AuthenticationState> GetAuthenticationStateAsync()
{
....
var claims = new[] { new Claim(ClaimTypes.Name, "xyz#afs.com") };
var authenticatedUser = new ClaimsPrincipal(new ClaimsIdentity(claims, AuthenticationTypes.Password));
var authState = Task.FromResult(new AuthenticationState(authenticatedUser));
...
return Task.FromResult(authState);
}
}
Note the AuthenticationTypes.Password parameter in the above code for
ClaimsIdentity. Check to change it in all places wherever
ClaimsIdentity is constructed.
If needed check the auth type of user
if (User.Identity.AuthenticationType == AuthenticationTypes.Password) {
// ...
}
So that you can be able to login successfully.
Or try using RemoteAuthenticationService as said in https://github.com/dotnet/aspnetcore/issues
Reference: .net core - Custom AuthenticationStateProvider Authentication Failing - Stack Overflow

Generate access token with IdentityServer3 without password

How to manually generate access_token from server without password?
I want to allow super admins login as users and look at their problems and see the problems by their eyes, so i need user access_token. i already see this question but didn't help me in IdentityServer3.

first create a custom grant named loginBy
public class LoginByGrant : ICustomGrantValidator
{
private readonly ApplicationUserManager _userManager;
public string GrantType => "loginBy";
public LoginByGrant(ApplicationUserManager userManager)
{
_userManager = userManager;
}
public async Task<CustomGrantValidationResult> ValidateAsync(ValidatedTokenRequest request)
{
var userId = Guid.Parse(request.Raw.Get("user_id"));
var user = await _userManager.FindByIdAsync(userId);
if (user == null)
return await Task.FromResult<CustomGrantValidationResult>(new CustomGrantValidationResult("user not exist"));
var userClaims = await _userManager.GetClaimsAsync(user.Id);
return
await Task.FromResult<CustomGrantValidationResult>(new CustomGrantValidationResult(user.Id.ToString(), "custom", userClaims));
}
}
then add this custom grant in identity startup class
factory.CustomGrantValidators.Add(
new Registration<ICustomGrantValidator>(resolver => new LoginByGrant(ApplicaionUserManager)));
and finally in your api
public async Task<IHttpActionResult> LoginBy(Guid userId)
{
var tokenClient = new TokenClient(Constants.TokenEndPoint, Constants.ClientId, Constants.Secret);
var payload = new { user_id = userId.ToString() };
var result = await tokenClient.RequestCustomGrantAsync("loginBy", "customScope", payload);
if (result.IsError)
return Ok(result.Json);
return Ok(new { access_token = result.AccessToken, expires_in = result.ExpiresIn});
}
this is for identityServer3 but for identityServer4 it is pretty similar

IdentityServer4: How to manually create a JWT for a user? [duplicate]

I have created ASP.NET Core WebApi protected with IdentityServer4 using ROPC flow (using this example: https://github.com/robisim74/AngularSPAWebAPI).
How to manually generate access_token from the server without password?

[HttpPost("loginas/{id}")]
[Authorize(Roles = "admin")]
public async Task<IActionResult> LoginAs(int id, [FromServices] ITokenService TS,
[FromServices] IUserClaimsPrincipalFactory<ApplicationUser> principalFactory,
[FromServices] IdentityServerOptions options)
{
var Request = new TokenCreationRequest();
var User = await userManager.FindByIdAsync(id.ToString());
var IdentityPricipal = await principalFactory.CreateAsync(User);
var IdServerPrincipal = IdentityServerPrincipal.Create(User.Id.ToString(), User.UserName, IdentityPricipal.Claims.ToArray());
Request.Subject = IdServerPrincipal;
Request.IncludeAllIdentityClaims = true;
Request.ValidatedRequest = new ValidatedRequest();
Request.ValidatedRequest.Subject = Request.Subject;
Request.ValidatedRequest.SetClient(Config.GetClients().First());
Request.Resources = new Resources(Config.GetIdentityResources(), Config.GetApiResources());
Request.ValidatedRequest.Options = options;
Request.ValidatedRequest.ClientClaims = IdServerPrincipal.Claims.ToArray();
var Token = await TS.CreateAccessTokenAsync(Request);
Token.Issuer = "http://" + HttpContext.Request.Host.Value;
var TokenValue = await TS.CreateSecurityTokenAsync(Token);
return Ok(TokenValue);
}
For a newly released IdentityServer 2.0.0 the code needs some modifications:
[HttpPost("loginas/{id}")]
[Authorize(Roles = "admin")]
public async Task<IActionResult> LoginAs(int id, [FromServices] ITokenService TS,
[FromServices] IUserClaimsPrincipalFactory<ApplicationUser> principalFactory,
[FromServices] IdentityServerOptions options)
{
var Request = new TokenCreationRequest();
var User = await userManager.FindByIdAsync(id.ToString());
var IdentityPricipal = await principalFactory.CreateAsync(User);
var IdentityUser = new IdentityServerUser(User.Id.ToString());
IdentityUser.AdditionalClaims = IdentityPricipal.Claims.ToArray();
IdentityUser.DisplayName = User.UserName;
IdentityUser.AuthenticationTime = System.DateTime.UtcNow;
IdentityUser.IdentityProvider = IdentityServerConstants.LocalIdentityProvider;
Request.Subject = IdentityUser.CreatePrincipal();
Request.IncludeAllIdentityClaims = true;
Request.ValidatedRequest = new ValidatedRequest();
Request.ValidatedRequest.Subject = Request.Subject;
Request.ValidatedRequest.SetClient(Config.GetClients().First());
Request.Resources = new Resources(Config.GetIdentityResources(), Config.GetApiResources());
Request.ValidatedRequest.Options = options;
Request.ValidatedRequest.ClientClaims = IdentityUser.AdditionalClaims;
var Token = await TS.CreateAccessTokenAsync(Request);
Token.Issuer = HttpContext.Request.Scheme + "://" + HttpContext.Request.Host.Value;
var TokenValue = await TS.CreateSecurityTokenAsync(Token);
return Ok(TokenValue);
}

Use this:
http://docs.identityserver.io/en/latest/topics/tools.html
Use this tool that come with identity server:
Declare it in the constructor, to receive by dependecy injection.
IdentityServer4.IdentityServerTools _identityServerTools
var issuer = "http://" + httpRequest.Host.Value;
var token = await _identityServerTools.IssueJwtAsync(
30000,
issuer,
new System.Security.Claims.Claim[1]
{
new System.Security.Claims.Claim("cpf", cpf)
}
);

Here is another way to achieve this:
first create a custom grant named loginBy
public class LoginByGrant : ICustomGrantValidator
{
private readonly ApplicationUserManager _userManager;
public string GrantType => "loginBy";
public LoginByGrant(ApplicationUserManager userManager)
{
_userManager = userManager;
}
public async Task<CustomGrantValidationResult> ValidateAsync(ValidatedTokenRequest request)
{
var userId = Guid.Parse(request.Raw.Get("user_id"));
var user = await _userManager.FindByIdAsync(userId);
if (user == null)
return await Task.FromResult<CustomGrantValidationResult>(new CustomGrantValidationResult("user not exist"));
var userClaims = await _userManager.GetClaimsAsync(user.Id);
return
await Task.FromResult<CustomGrantValidationResult>(new CustomGrantValidationResult(user.Id.ToString(), "custom", userClaims));
}
}
then add this custom grant in identity startup class
factory.CustomGrantValidators.Add(
new Registration<ICustomGrantValidator>(resolver => new LoginByGrant(ApplicaionUserManager)));
and finally in your api
public async Task<IHttpActionResult> LoginBy(Guid userId)
{
var tokenClient = new TokenClient(Constants.TokenEndPoint, Constants.ClientId, Constants.Secret);
var payload = new { user_id = userId.ToString() };
var result = await tokenClient.RequestCustomGrantAsync("loginBy", "customScope", payload);
if (result.IsError)
return Ok(result.Json);
return Ok(new { access_token = result.AccessToken, expires_in = result.ExpiresIn});
}

Further to my comment on your original question. Implement an impersonation feature within the implicit/hybrid flow. If a user is determined to be a "super admin" then present them with an additional step after authentication that lets them enter/select the account they wish to impersonate. Once that's done simply establish the session on the identity server as the selected user (and possibly store additional claims denoting that it is an impersonated session and who is doing the impersonation). Any tokens will then be issued as if you were that user and all without having to know the password.
Additionally if you wish to create tokens yourself have a look at the ITokenCreationService provided by IdSrv4. You can inject that into your own controller/service/whatever and use CreateTokenAsync(Token token) to generate a signed JWT with any claims you like.

A little late to answer.
in my case of Generating Access Token Without Password there was another identity server as an organization sso, and our implementation already used IdentityServer, so we need to get user token from second IdentityServer (after user login and redirected to our app), extract sub, check if it is already existed(if not insert into our local IdentityServer), finally select user and use newly grant to get token for user.
your client should have this granttype as Allowed Grant types (here userexchange):
see: identity server docs, or duende docs for more information
public class TokenExchangeGrantValidator : IExtensionGrantValidator {
protected readonly UserManager<ToranjApplicationUser> _userManager;
private readonly IEventService _events;
public TokenExchangeGrantValidator(ITokenValidator validator, IHttpContextAccessor httpContextAccessor, UserManager<ToranjApplicationUser> userManager
, IEventService events) {
_userManager = userManager;
_events = events;
}
public async Task ValidateAsync(ExtensionGrantValidationContext context) {
var userName = context.Request.Raw.Get("uname");
if (string.IsNullOrEmpty(userName)) {
context.Result = new GrantValidationResult(TokenRequestErrors.InvalidGrant);
return;
}
var user = await _userManager.FindByNameAsync(userName);
// or use this one, if you are sending userId
//var user = await _userManager.FindByIdAsync(userId);
if (null == user) {
context.Result = new GrantValidationResult(TokenRequestErrors.InvalidGrant);
return;
}
await _events.RaiseAsync(new UserLoginSuccessEvent(user.UserName, user.Id.ToString(), user.UserName, false, context.Request.ClientId));
var customResponse = new Dictionary<string, object>
{
{OidcConstants.TokenResponse.IssuedTokenType, OidcConstants.TokenTypeIdentifiers.AccessToken}
};
context.Result = new GrantValidationResult(
subject: user.Id.ToString(),
authenticationMethod: GrantType,
customResponse: customResponse);
}
public string GrantType => "userexchange";
}
in your startup's ConfigureServices after var builder = services.AddIdentityServer(...) add your newly created class.
builder.AddExtensionGrantValidator<TokenExchangeGrantValidator>();
calling it to get token is as simple as:
POST /connect/token
grant_type=userexchange&
scope=yourapi&
uname=yourusername&
client_id=yourClientId
client_secret=secret

How to update a claim in ASP.NET Identity?

I'm using OWIN authentication for my MVC5 project.
This is my SignInAsync
private async Task SignInAsync(ApplicationUser user, bool isPersistent)
{
var AccountNo = "101";
AuthenticationManager.SignOut(DefaultAuthenticationTypes.ExternalCookie);
var identity = await UserManager.CreateIdentityAsync(user, DefaultAuthenticationTypes.ApplicationCookie);
identity.AddClaim(new Claim(ClaimTypes.UserData, AccountNo));
AuthenticationManager.SignIn(new AuthenticationProperties() { IsPersistent = isPersistent, RedirectUri="Account/Index"}, identity);
}
As you can see, i added AccountNo into the Claims list.
Now, how can I update this Claim at some point in my application? So far, i have this:
public string AccountNo
{
get
{
var CP = ClaimsPrincipal.Current.Identities.First();
var Account= CP.Claims.FirstOrDefault(p => p.Type == ClaimTypes.UserData);
return Account.Value;
}
set
{
var CP = ClaimsPrincipal.Current.Identities.First();
var AccountNo= CP.Claims.FirstOrDefault(p => p.Type == ClaimTypes.UserData).Value;
CP.RemoveClaim(new Claim(ClaimTypes.UserData,AccountNo));
CP.AddClaim(new Claim(ClaimTypes.UserData, value));
}
}
when i try to remove the claim, I get this exception:
The Claim
'http://schemas.microsoft.com/ws/2008/06/identity/claims/userdata:
101' was not able to be removed. It is either not part of this
Identity or it is a claim that is owned by the Principal that contains
this Identity. For example, the Principal will own the claim when
creating a GenericPrincipal with roles. The roles will be exposed
through the Identity that is passed in the constructor, but not
actually owned by the Identity. Similar logic exists for a
RolePrincipal.
How does one remove and update the Claim?

I created a Extension method to Add/Update/Read Claims based on a given ClaimsIdentity
namespace Foobar.Common.Extensions
{
public static class Extensions
{
public static void AddUpdateClaim(this IPrincipal currentPrincipal, string key, string value)
{
var identity = currentPrincipal.Identity as ClaimsIdentity;
if (identity == null)
return;
// check for existing claim and remove it
var existingClaim = identity.FindFirst(key);
if (existingClaim != null)
identity.RemoveClaim(existingClaim);
// add new claim
identity.AddClaim(new Claim(key, value));
var authenticationManager = HttpContext.Current.GetOwinContext().Authentication;
authenticationManager.AuthenticationResponseGrant = new AuthenticationResponseGrant(new ClaimsPrincipal(identity), new AuthenticationProperties() { IsPersistent = true });
}
public static string GetClaimValue(this IPrincipal currentPrincipal, string key)
{
var identity = currentPrincipal.Identity as ClaimsIdentity;
if (identity == null)
return null;
var claim = identity.Claims.FirstOrDefault(c => c.Type == key);
// ?. prevents a exception if claim is null.
return claim?.Value;
}
}
}
and then to use it
using Foobar.Common.Extensions;
namespace Foobar.Web.Main.Controllers
{
public class HomeController : Controller
{
public ActionResult Index()
{
// add/updating claims
User.AddUpdateClaim("key1", "value1");
User.AddUpdateClaim("key2", "value2");
User.AddUpdateClaim("key3", "value3");
}
public ActionResult Details()
{
// reading a claim
var key2 = User.GetClaimValue("key2");
}
}
}

You can create a new ClaimsIdentity and then do the claims update with such.
set {
// get context of the authentication manager
var authenticationManager = HttpContext.GetOwinContext().Authentication;
// create a new identity from the old one
var identity = new ClaimsIdentity(User.Identity);
// update claim value
identity.RemoveClaim(identity.FindFirst("AccountNo"));
identity.AddClaim(new Claim("AccountNo", value));
// tell the authentication manager to use this new identity
authenticationManager.AuthenticationResponseGrant =
new AuthenticationResponseGrant(
new ClaimsPrincipal(identity),
new AuthenticationProperties { IsPersistent = true }
);
}

Another (async) approach, using Identity's UserManager and SigninManager to reflect the change in the Identity cookie (and to optionally remove claims from db table AspNetUserClaims):
// Get User and a claims-based identity
ApplicationUser user = await UserManager.FindByIdAsync(User.Identity.GetUserId());
var Identity = new ClaimsIdentity(User.Identity);
// Remove existing claim and replace with a new value
await UserManager.RemoveClaimAsync(user.Id, Identity.FindFirst("AccountNo"));
await UserManager.AddClaimAsync(user.Id, new Claim("AccountNo", value));
// Re-Signin User to reflect the change in the Identity cookie
await SignInManager.SignInAsync(user, isPersistent: false, rememberBrowser: false);
// [optional] remove claims from claims table dbo.AspNetUserClaims, if not needed
var userClaims = UserManager.GetClaims(user.Id);
if (userClaims.Any())
{
foreach (var item in userClaims)
{
UserManager.RemoveClaim(user.Id, item);
}
}

Using latest Asp.Net Identity with .net core 2.1, I'm being able to update user claims with the following logic.
Register a UserClaimsPrincipalFactory so that every time SignInManager sings user in, the claims are created.
services.AddScoped<IUserClaimsPrincipalFactory<ApplicationUser>, UserClaimService>();
Implement a custom UserClaimsPrincipalFactory<TUser, TRole> like below
public class UserClaimService : UserClaimsPrincipalFactory<ApplicationUser, ApplicationRole>
{
private readonly ApplicationDbContext _dbContext;
public UserClaimService(ApplicationDbContext dbContext, UserManager<ApplicationUser> userManager, RoleManager<ApplicationRole> roleManager, IOptions<IdentityOptions> optionsAccessor) : base(userManager, roleManager, optionsAccessor)
{
_dbContext = dbContext;
}
public override async Task<ClaimsPrincipal> CreateAsync(ApplicationUser user)
{
var principal = await base.CreateAsync(user);
// Get user claims from DB using dbContext
// Add claims
((ClaimsIdentity)principal.Identity).AddClaim(new Claim("claimType", "some important claim value"));
return principal;
}
}
Later in your application when you change something in the DB and would like to reflect this to your authenticated and signed in user, following lines achieves this:
var user = await _userManager.GetUserAsync(User);
await _signInManager.RefreshSignInAsync(user);
This makes sure user can see up to date information without requiring login again. I put this just before returning the result in the controller so that when the operation finishes, everything securely refreshed.
Instead of editing existing claims and creating race conditions for secure cookie etc, you just sign user in silently and refresh the state :)

I get that exception too and cleared things up like this
var identity = User.Identity as ClaimsIdentity;
var newIdentity = new ClaimsIdentity(identity.AuthenticationType, identity.NameClaimType, identity.RoleClaimType);
newIdentity.AddClaims(identity.Claims.Where(c => false == (c.Type == claim.Type && c.Value == claim.Value)));
// the claim has been removed, you can add it with a new value now if desired
AuthenticationManager.SignOut(identity.AuthenticationType);
AuthenticationManager.SignIn(new AuthenticationProperties() { IsPersistent = isPersistent }, newIdentity);

Compiled some answers from here into re-usable ClaimsManager class with my additions.
Claims got persisted, user cookie updated, sign in refreshed.
Please note that ApplicationUser can be substituted with IdentityUser if you didn't customize former. Also in my case it needs to have slightly different logic in Development environment, so you might want to remove IWebHostEnvironment dependency.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Claims;
using System.Threading.Tasks;
using YourMvcCoreProject.Models;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Identity;
using Microsoft.Extensions.Hosting;
namespace YourMvcCoreProject.Identity
{
public class ClaimsManager
{
private readonly UserManager<ApplicationUser> _userManager;
private readonly SignInManager<ApplicationUser> _signInManager;
private readonly IWebHostEnvironment _env;
private readonly ClaimsPrincipalAccessor _currentPrincipalAccessor;
public ClaimsManager(
ClaimsPrincipalAccessor currentPrincipalAccessor,
UserManager<ApplicationUser> userManager,
SignInManager<ApplicationUser> signInManager,
IWebHostEnvironment env)
{
_currentPrincipalAccessor = currentPrincipalAccessor;
_userManager = userManager;
_signInManager = signInManager;
_env = env;
}
/// <param name="refreshSignin">Sometimes (e.g. when adding multiple claims at once) it is desirable to refresh cookie only once, for the last one </param>
public async Task AddUpdateClaim(string claimType, string claimValue, bool refreshSignin = true)
{
await AddClaim(
_currentPrincipalAccessor.ClaimsPrincipal,
claimType,
claimValue,
async user =>
{
await RemoveClaim(_currentPrincipalAccessor.ClaimsPrincipal, user, claimType);
},
refreshSignin);
}
public async Task AddClaim(string claimType, string claimValue, bool refreshSignin = true)
{
await AddClaim(_currentPrincipalAccessor.ClaimsPrincipal, claimType, claimValue, refreshSignin);
}
/// <summary>
/// At certain stages of user auth there is no user yet in context but there is one to work with in client code (e.g. calling from ClaimsTransformer)
/// that's why we have principal as param
/// </summary>
public async Task AddClaim(ClaimsPrincipal principal, string claimType, string claimValue, bool refreshSignin = true)
{
await AddClaim(
principal,
claimType,
claimValue,
async user =>
{
// allow reassignment in dev
if (_env.IsDevelopment())
await RemoveClaim(principal, user, claimType);
if (GetClaim(principal, claimType) != null)
throw new ClaimCantBeReassignedException(claimType);
},
refreshSignin);
}
public async Task RemoveClaims(IEnumerable<string> claimTypes, bool refreshSignin = true)
{
await RemoveClaims(_currentPrincipalAccessor.ClaimsPrincipal, claimTypes, refreshSignin);
}
public async Task RemoveClaims(ClaimsPrincipal principal, IEnumerable<string> claimTypes, bool refreshSignin = true)
{
AssertAuthenticated(principal);
foreach (var claimType in claimTypes)
{
await RemoveClaim(principal, claimType);
}
// reflect the change in the Identity cookie
if (refreshSignin)
await _signInManager.RefreshSignInAsync(await _userManager.GetUserAsync(principal));
}
public async Task RemoveClaim(string claimType, bool refreshSignin = true)
{
await RemoveClaim(_currentPrincipalAccessor.ClaimsPrincipal, claimType, refreshSignin);
}
public async Task RemoveClaim(ClaimsPrincipal principal, string claimType, bool refreshSignin = true)
{
AssertAuthenticated(principal);
var user = await _userManager.GetUserAsync(principal);
await RemoveClaim(principal, user, claimType);
// reflect the change in the Identity cookie
if (refreshSignin)
await _signInManager.RefreshSignInAsync(user);
}
private async Task AddClaim(ClaimsPrincipal principal, string claimType, string claimValue, Func<ApplicationUser, Task> processExistingClaims, bool refreshSignin)
{
AssertAuthenticated(principal);
var user = await _userManager.GetUserAsync(principal);
await processExistingClaims(user);
var claim = new Claim(claimType, claimValue);
ClaimsIdentity(principal).AddClaim(claim);
await _userManager.AddClaimAsync(user, claim);
// reflect the change in the Identity cookie
if (refreshSignin)
await _signInManager.RefreshSignInAsync(user);
}
/// <summary>
/// Due to bugs or as result of debug it can be more than one identity of the same type.
/// The method removes all the claims of a given type.
/// </summary>
private async Task RemoveClaim(ClaimsPrincipal principal, ApplicationUser user, string claimType)
{
AssertAuthenticated(principal);
var identity = ClaimsIdentity(principal);
var claims = identity.FindAll(claimType).ToArray();
if (claims.Length > 0)
{
await _userManager.RemoveClaimsAsync(user, claims);
foreach (var c in claims)
{
identity.RemoveClaim(c);
}
}
}
private static Claim GetClaim(ClaimsPrincipal principal, string claimType)
{
return ClaimsIdentity(principal).FindFirst(claimType);
}
/// <summary>
/// This kind of bugs has to be found during testing phase
/// </summary>
private static void AssertAuthenticated(ClaimsPrincipal principal)
{
if (!principal.Identity.IsAuthenticated)
throw new InvalidOperationException("User should be authenticated in order to update claims");
}
private static ClaimsIdentity ClaimsIdentity(ClaimsPrincipal principal)
{
return (ClaimsIdentity) principal.Identity;
}
}
public class ClaimCantBeReassignedException : Exception
{
public ClaimCantBeReassignedException(string claimType) : base($"{claimType} can not be reassigned")
{
}
}
public class ClaimsPrincipalAccessor
{
private readonly IHttpContextAccessor _httpContextAccessor;
public ClaimsPrincipalAccessor(IHttpContextAccessor httpContextAccessor)
{
_httpContextAccessor = httpContextAccessor;
}
public ClaimsPrincipal ClaimsPrincipal => _httpContextAccessor.HttpContext.User;
}
// to register dependency put this into your Startup.cs and inject ClaimsManager into Controller constructor (or other class) the in same way as you do for other dependencies
public class Startup
{
public IServiceProvider ConfigureServices(IServiceCollection services)
{
services.AddTransient<ClaimsPrincipalAccessor>();
services.AddTransient<ClaimsManager>();
}
}
}

when I use MVC5, and add the claim here.
public async Task<ClaimsIdentity> GenerateUserIdentityAsync(PATAUserManager manager)
{
// Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
// Add custom user claims here
userIdentity.AddClaim(new Claim(ClaimTypes.Role, this.Role));
return userIdentity;
}
when I'm check the claim result in the SignInAsync function,i can't get the role value use anyway. But...
after this request finished, I can access Role in other action(anther request).
var userWithClaims = (ClaimsPrincipal)User;
Claim CRole = userWithClaims.Claims.First(c => c.Type == ClaimTypes.Role);
so, i think maybe asynchronous cause the IEnumerable updated behind the process.

You can update claims for the current user by implementing a CookieAuthenticationEvents class and overriding ValidatePrincipal. There you can remove the old claim, add the new one, and then replace the principal using CookieValidatePrincipalContext.ReplacePrincipal. This does not affect any claims stored in the database. This is using ASP.NET Core Identity 2.2.
public class MyCookieAuthenticationEvents : CookieAuthenticationEvents
{
string newAccountNo = "102";
public override Task ValidatePrincipal(CookieValidatePrincipalContext context)
{
// first remove the old claim
var claim = context.Principal.FindFirst(ClaimTypes.UserData);
if (claim != null)
{
((ClaimsIdentity)context.Principal.Identity).RemoveClaim(claim);
}
// add the new claim
((ClaimsIdentity)context.Principal.Identity).AddClaim(new Claim(ClaimTypes.UserData, newAccountNo));
// replace the claims
context.ReplacePrincipal(context.Principal);
context.ShouldRenew = true;
return Task.CompletedTask;
}
}
You need to register the events class in Startup.cs:
public IServiceProvider ConfigureServices(IServiceCollection services)
{
services.AddScoped<MyCookieAuthenticationEvents>();
services.ConfigureApplicationCookie(o =>
{
o.EventsType = typeof(MyCookieAuthenticationEvents);
});
}
You can inject services into the events class to access the new AccountNo value but as per the warning on this page you should avoid doing anything too expensive:
Warning
The approach described here is triggered on every request. Validating
authentication cookies for all users on every request can result in a
large performance penalty for the app.

I am using a .net core 2.2 app and used the following solution:
in my statup.cs
public void ConfigureServices(IServiceCollection services)
{
...
services.AddIdentity<IdentityUser, IdentityRole>(options =>
{
...
})
.AddEntityFrameworkStores<AdminDbContext>()
.AddDefaultTokenProviders()
.AddSignInManager();
usage
private readonly SignInManager<IdentityUser> _signInManager;
public YourController(
...,
SignInManager<IdentityUser> signInManager)
{
...
_signInManager = signInManager;
}
public async Task<IActionResult> YourMethod() // <-NOTE IT IS ASYNC
{
var user = _userManager.FindByNameAsync(User.Identity.Name).Result;
var claimToUse = ClaimsHelpers.CreateClaim(ClaimTypes.ActiveCompany, JsonConvert.SerializeObject(cc));
var claimToRemove = _userManager.GetClaimsAsync(user).Result
.FirstOrDefault(x => x.Type == ClaimTypes.ActiveCompany.ToString());
if (claimToRemove != null)
{
var result = _userManager.ReplaceClaimAsync(user, claimToRemove, claimToUse).Result;
await _signInManager.RefreshSignInAsync(user); //<--- THIS
}
else ...

The simplest solution for updating existing claims for me at the moment was:
//updating user data
await signInManager.SignOutAsync();
await signInManager.SignInAsync(user, false);

Appreciate this question was about .NET 4/ OWIN, but to aid searchers looking for the .NET 5 or later equivalent, here's some sample code.
I'm sure you can improve it, but it's a working starter using the UserManager and SignInManager in Microsoft.AspNetCore.Identity.
// Get the user first first.
var claims = await _userManager.GetClaimsAsync(user);
var givenNameClaim = claims.FirstOrDefault(r => r.Type == JwtClaimTypes.GivenName);
IdentityResult result = null;
if (givenNameClaim != null)
{
result = await _userManager.ReplaceClaimAsync(user, givenNameClaim, new Claim(JwtClaimTypes.GivenName, "<newvalue>"));
}
else
{
result = await _userManager.AddClaimAsync(user, new Claim(JwtClaimTypes.GivenName, "<newvalue>"));
}
if (result.Errors.Any())
{
// TODO: List errors here;
}
else
{
await _signInManager.RefreshSignInAsync(user); // refresh the login, so it takes effect immediately.
}

To remove claim details from database we can use below code. Also, we need to sign in again to update the cookie values
// create a new identity
var identity = new ClaimsIdentity(User.Identity);
// Remove the existing claim value of current user from database
if(identity.FindFirst("NameOfUser")!=null)
await UserManager.RemoveClaimAsync(applicationUser.Id, identity.FindFirst("NameOfUser"));
// Update customized claim
await UserManager.AddClaimAsync(applicationUser.Id, new Claim("NameOfUser", applicationUser.Name));
// the claim has been updates, We need to change the cookie value for getting the updated claim
AuthenticationManager.SignOut(identity.AuthenticationType);
await SignInManager.SignInAsync(Userprofile, isPersistent: false, rememberBrowser: false);
return RedirectToAction("Index", "Home");

Multiple Cookies,Multiple Claims
public class ClaimsCookie
{
private readonly ClaimsPrincipal _user;
private readonly HttpContext _httpContext;
public ClaimsCookie(ClaimsPrincipal user, HttpContext httpContext = null)
{
_user = user;
_httpContext = httpContext;
}
public string GetValue(CookieName cookieName, KeyName keyName)
{
var principal = _user as ClaimsPrincipal;
var cp = principal.Identities.First(i => i.AuthenticationType == ((CookieName)cookieName).ToString());
return cp.FindFirst(((KeyName)keyName).ToString()).Value;
}
public async void SetValue(CookieName cookieName, KeyName[] keyName, string[] value)
{
if (keyName.Length != value.Length)
{
return;
}
var principal = _user as ClaimsPrincipal;
var cp = principal.Identities.First(i => i.AuthenticationType == ((CookieName)cookieName).ToString());
for (int i = 0; i < keyName.Length; i++)
{
if (cp.FindFirst(((KeyName)keyName[i]).ToString()) != null)
{
cp.RemoveClaim(cp.FindFirst(((KeyName)keyName[i]).ToString()));
cp.AddClaim(new Claim(((KeyName)keyName[i]).ToString(), value[i]));
}
}
await _httpContext.SignOutAsync(CookieName.UserProfilCookie.ToString());
await _httpContext.SignInAsync(CookieName.UserProfilCookie.ToString(), new ClaimsPrincipal(cp),
new AuthenticationProperties
{
IsPersistent = bool.Parse(cp.FindFirst(KeyName.IsPersistent.ToString()).Value),
AllowRefresh = true
});
}
public enum CookieName
{
CompanyUserProfilCookie = 0, UserProfilCookie = 1, AdminPanelCookie = 2
}
public enum KeyName
{
Id, Name, Surname, Image, IsPersistent
}
}

if (HttpContext.User.Identity is ClaimsIdentity identity)
{
identity.RemoveClaim(identity.FindFirst("userId"));
identity.AddClaim(new Claim("userId", userInfo?.id.ToString()));
await HttpContext.SignInAsync(
CookieAuthenticationDefaults.AuthenticationScheme,
new ClaimsPrincipal(HttpContext.User.Identity));
}

Old thread i know, but the requirements seem to have changed.
The below is working for me:
var user = await _userManager.FindByEmailAsync(input.Email);
var userClaim = await _userManager.GetClaimsAsync(user);
var userNameClaims = userClaim.Where(x => x.Type == ClaimTypes.GivenName).ToList();
await _userManager.RemoveClaimsAsync(user, userNameClaims);
await _userManager.AddClaimAsync(user, new Claim(ClaimTypes.GivenName, user.Forename));
await _signInManager.SignOutAsync();
await _signInManager.SignInAsync(user, new AuthenticationProperties() { IsPersistent = input.RememberMe });
The sign out and in methods are essential, without the claims don't reflect the changes

The extension method worked great for me with one exception that if the user logs out there old claim sets still existed so with a tiny modification as in passing usermanager through everything works great and you dont need to logout and login.
I cant answer directly as my reputation has been dissed :(
public static class ClaimExtensions
{
public static void AddUpdateClaim(this IPrincipal currentPrincipal, string key, string value, ApplicationUserManager userManager)
{
var identity = currentPrincipal.Identity as ClaimsIdentity;
if (identity == null)
return;
// check for existing claim and remove it
var existingClaim = identity.FindFirst(key);
if (existingClaim != null)
{
RemoveClaim(currentPrincipal, key, userManager);
}
// add new claim
var claim = new Claim(key, value);
identity.AddClaim(claim);
var authenticationManager = HttpContext.Current.GetOwinContext().Authentication;
authenticationManager.AuthenticationResponseGrant = new AuthenticationResponseGrant(new ClaimsPrincipal(identity), new AuthenticationProperties() { IsPersistent = true });
//Persist to store
userManager.AddClaim(identity.GetUserId(),claim);
}
public static void RemoveClaim(this IPrincipal currentPrincipal, string key, ApplicationUserManager userManager)
{
var identity = currentPrincipal.Identity as ClaimsIdentity;
if (identity == null)
return ;
// check for existing claim and remove it
var existingClaims = identity.FindAll(key);
existingClaims.ForEach(c=> identity.RemoveClaim(c));
//remove old claims from store
var user = userManager.FindById(identity.GetUserId());
var claims = userManager.GetClaims(user.Id);
claims.Where(x => x.Type == key).ToList().ForEach(c => userManager.RemoveClaim(user.Id, c));
}
public static string GetClaimValue(this IPrincipal currentPrincipal, string key)
{
var identity = currentPrincipal.Identity as ClaimsIdentity;
if (identity == null)
return null;
var claim = identity.Claims.First(c => c.Type == key);
return claim.Value;
}
public static string GetAllClaims(this IPrincipal currentPrincipal, ApplicationUserManager userManager)
{
var identity = currentPrincipal.Identity as ClaimsIdentity;
if (identity == null)
return null;
var claims = userManager.GetClaims(identity.GetUserId());
var userClaims = new StringBuilder();
claims.ForEach(c => userClaims.AppendLine($"<li>{c.Type}, {c.Value}</li>"));
return userClaims.ToString();
}
}

Here you go:
var user = User as ClaimsPrincipal;
var identity = user.Identity as ClaimsIdentity;
var claim = (from c in user.Claims
where c.Type == ClaimTypes.UserData
select c).Single();
identity.RemoveClaim(claim);
taken from here.