public async Task <IActionResult> Authorize() { var request = HttpContext.GetOpenIddictServerRequest() ?? throw new InvalidOperationException("The OpenID Connect request cannot be retrieved."); // Retrieve the user principal stored in the authentication cookie. // If it can't be extracted, redirect the user to the login page. var result = await HttpContext.AuthenticateAsync(IdentityConstants.ApplicationScheme); if (result == null || !result.Succeeded) { // If the client application requested promptless authentication, // return an error indicating that the user is not logged in. if (request.HasPrompt(Prompts.None)) { return(Forbid( authenticationSchemes: OpenIddictServerAspNetCoreDefaults.AuthenticationScheme, properties: new AuthenticationProperties(new Dictionary <string, string> { [OpenIddictServerAspNetCoreConstants.Properties.Error] = Errors.LoginRequired, [OpenIddictServerAspNetCoreConstants.Properties.ErrorDescription] = "The user is not logged in." }))); } return(Challenge( authenticationSchemes: IdentityConstants.ApplicationScheme, properties: new AuthenticationProperties { RedirectUri = Request.PathBase + Request.Path + QueryString.Create( Request.HasFormContentType ? Request.Form.ToList() : Request.Query.ToList()) })); } // If prompt=login was specified by the client application, // immediately return the user agent to the login page. if (request.HasPrompt(Prompts.Login)) { // To avoid endless login -> authorization redirects, the prompt=login flag // is removed from the authorization request payload before redirecting the user. var prompt = string.Join(" ", request.GetPrompts().Remove(Prompts.Login)); var parameters = Request.HasFormContentType ? Request.Form.Where(parameter => parameter.Key != Parameters.Prompt).ToList() : Request.Query.Where(parameter => parameter.Key != Parameters.Prompt).ToList(); parameters.Add(KeyValuePair.Create(Parameters.Prompt, new StringValues(prompt))); return(Challenge( authenticationSchemes: IdentityConstants.ApplicationScheme, properties: new AuthenticationProperties { RedirectUri = Request.PathBase + Request.Path + QueryString.Create(parameters) })); } // If a max_age parameter was provided, ensure that the cookie is not too old. // If it's too old, automatically redirect the user agent to the login page. if (request.MaxAge != null && result.Properties?.IssuedUtc != null && DateTimeOffset.UtcNow - result.Properties.IssuedUtc > TimeSpan.FromSeconds(request.MaxAge.Value)) { if (request.HasPrompt(Prompts.None)) { return(Forbid( authenticationSchemes: OpenIddictServerAspNetCoreDefaults.AuthenticationScheme, properties: new AuthenticationProperties(new Dictionary <string, string> { [OpenIddictServerAspNetCoreConstants.Properties.Error] = Errors.LoginRequired, [OpenIddictServerAspNetCoreConstants.Properties.ErrorDescription] = "The user is not logged in." }))); } return(Challenge( authenticationSchemes: IdentityConstants.ApplicationScheme, properties: new AuthenticationProperties { RedirectUri = Request.PathBase + Request.Path + QueryString.Create( Request.HasFormContentType ? Request.Form.ToList() : Request.Query.ToList()) })); } // Retrieve the profile of the logged in user. var user = await _userManager.GetUserAsync(result.Principal) ?? throw new InvalidOperationException("The user details cannot be retrieved."); // Retrieve the application details from the database. var application = await _applicationManager.FindByClientIdAsync(request.ClientId) ?? throw new InvalidOperationException("Details concerning the calling client application cannot be found."); // Retrieve the permanent authorizations associated with the user and the calling client application. var authorizations = await _authorizationManager.FindAsync( subject : await _userManager.GetUserIdAsync(user), client : await _applicationManager.GetIdAsync(application), status : Statuses.Valid, type : AuthorizationTypes.Permanent, scopes : request.GetScopes()).ToListAsync(); switch (await _applicationManager.GetConsentTypeAsync(application)) { // If the consent is external (e.g when authorizations are granted by a sysadmin), // immediately return an error if no authorization can be found in the database. case ConsentTypes.External when !authorizations.Any(): return(Forbid( authenticationSchemes: OpenIddictServerAspNetCoreDefaults.AuthenticationScheme, properties: new AuthenticationProperties(new Dictionary <string, string> { [OpenIddictServerAspNetCoreConstants.Properties.Error] = Errors.ConsentRequired, [OpenIddictServerAspNetCoreConstants.Properties.ErrorDescription] = "The logged in user is not allowed to access this client application." }))); // If the consent is implicit or if an authorization was found, // return an authorization response without displaying the consent form. case ConsentTypes.Implicit: case ConsentTypes.External when authorizations.Any(): case ConsentTypes.Explicit when authorizations.Any() && !request.HasPrompt(Prompts.Consent): var principal = await _signInManager.CreateUserPrincipalAsync(user); // Note: in this sample, the granted scopes match the requested scope // but you may want to allow the user to uncheck specific scopes. // For that, simply restrict the list of scopes before calling SetScopes. principal.SetScopes(request.GetScopes()); principal.SetResources(await _scopeManager.ListResourcesAsync(principal.GetScopes()).ToListAsync()); // Automatically create a permanent authorization to avoid requiring explicit consent // for future authorization or token requests containing the same scopes. var authorization = authorizations.LastOrDefault(); if (authorization == null) { authorization = await _authorizationManager.CreateAsync( principal : principal, subject : await _userManager.GetUserIdAsync(user), client : await _applicationManager.GetIdAsync(application), type : AuthorizationTypes.Permanent, scopes : principal.GetScopes()); } principal.SetInternalAuthorizationId(await _authorizationManager.GetIdAsync(authorization)); foreach (var claim in principal.Claims) { claim.SetDestinations(GetDestinations(claim, principal)); } return(SignIn(principal, OpenIddictServerAspNetCoreDefaults.AuthenticationScheme)); // At this point, no authorization was found in the database and an error must be returned // if the client application specified prompt=none in the authorization request. case ConsentTypes.Explicit when request.HasPrompt(Prompts.None): case ConsentTypes.Systematic when request.HasPrompt(Prompts.None): return(Forbid( authenticationSchemes: OpenIddictServerAspNetCoreDefaults.AuthenticationScheme, properties: new AuthenticationProperties(new Dictionary <string, string> { [OpenIddictServerAspNetCoreConstants.Properties.Error] = Errors.ConsentRequired, [OpenIddictServerAspNetCoreConstants.Properties.ErrorDescription] = "Interactive user consent is required." }))); // In every other case, render the consent form. default: return(View(new AuthorizeViewModel { ApplicationName = await _applicationManager.GetDisplayNameAsync(application), Scope = request.Scope })); } }