/
Index.cshtml.cs
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/
Index.cshtml.cs
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// Copyright (c) Duende Software. All rights reserved.
// See LICENSE in the project root for license information.
using Duende.IdentityServer.Events;
using Duende.IdentityServer.Extensions;
using Duende.IdentityServer.Models;
using Duende.IdentityServer.Services;
using Duende.IdentityServer.Validation;
using IdentityModel;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
namespace IdentityServerHost.Pages.Consent;
[Authorize]
[SecurityHeaders]
public class Index : PageModel
{
private readonly IIdentityServerInteractionService _interaction;
private readonly IEventService _events;
private readonly ILogger<Index> _logger;
public Index(
IIdentityServerInteractionService interaction,
IEventService events,
ILogger<Index> logger)
{
_interaction = interaction;
_events = events;
_logger = logger;
}
public ViewModel View { get; set; } = default!;
[BindProperty]
public InputModel Input { get; set; } = default!;
public async Task<IActionResult> OnGet(string? returnUrl)
{
if (!await SetViewModelAsync(returnUrl))
{
return RedirectToPage("/Home/Error/Index");
}
Input = new InputModel
{
ReturnUrl = returnUrl,
};
return Page();
}
public async Task<IActionResult> OnPost()
{
// validate return url is still valid
var request = await _interaction.GetAuthorizationContextAsync(Input.ReturnUrl);
if (request == null) return RedirectToPage("/Home/Error/Index");
ConsentResponse? grantedConsent = null;
// user clicked 'no' - send back the standard 'access_denied' response
if (Input.Button == "no")
{
grantedConsent = new ConsentResponse { Error = AuthorizationError.AccessDenied };
// emit event
await _events.RaiseAsync(new ConsentDeniedEvent(User.GetSubjectId(), request.Client.ClientId, request.ValidatedResources.RawScopeValues));
Telemetry.Metrics.ConsentDenied(request.Client.ClientId, request.ValidatedResources.ParsedScopes.Select(s => s.ParsedName));
}
// user clicked 'yes' - validate the data
else if (Input.Button == "yes")
{
// if the user consented to some scope, build the response model
if (Input.ScopesConsented.Any())
{
var scopes = Input.ScopesConsented;
if (ConsentOptions.EnableOfflineAccess == false)
{
scopes = scopes.Where(x => x != Duende.IdentityServer.IdentityServerConstants.StandardScopes.OfflineAccess);
}
grantedConsent = new ConsentResponse
{
RememberConsent = Input.RememberConsent,
ScopesValuesConsented = scopes.ToArray(),
Description = Input.Description
};
// emit event
await _events.RaiseAsync(new ConsentGrantedEvent(User.GetSubjectId(), request.Client.ClientId, request.ValidatedResources.RawScopeValues, grantedConsent.ScopesValuesConsented, grantedConsent.RememberConsent));
Telemetry.Metrics.ConsentGranted(request.Client.ClientId, grantedConsent.ScopesValuesConsented, grantedConsent.RememberConsent);
var denied = request.ValidatedResources.ParsedScopes.Select(s => s.ParsedName).Except(grantedConsent.ScopesValuesConsented);
Telemetry.Metrics.ConsentDenied(request.Client.ClientId, denied);
}
else
{
ModelState.AddModelError("", ConsentOptions.MustChooseOneErrorMessage);
}
}
else
{
ModelState.AddModelError("", ConsentOptions.InvalidSelectionErrorMessage);
}
if (grantedConsent != null)
{
ArgumentNullException.ThrowIfNull(Input.ReturnUrl, nameof(Input.ReturnUrl));
// communicate outcome of consent back to identityserver
await _interaction.GrantConsentAsync(request, grantedConsent);
// redirect back to authorization endpoint
if (request.IsNativeClient() == true)
{
// The client is native, so this change in how to
// return the response is for better UX for the end user.
return this.LoadingPage(Input.ReturnUrl);
}
return Redirect(Input.ReturnUrl);
}
// we need to redisplay the consent UI
if (!await SetViewModelAsync(Input.ReturnUrl))
{
return RedirectToPage("/Home/Error/Index");
}
return Page();
}
private async Task<bool> SetViewModelAsync(string? returnUrl)
{
ArgumentNullException.ThrowIfNull(returnUrl);
var request = await _interaction.GetAuthorizationContextAsync(returnUrl);
if (request != null)
{
View = CreateConsentViewModel(request);
return true;
}
else
{
_logger.NoConsentMatchingRequest(returnUrl);
return false;
}
}
private ViewModel CreateConsentViewModel(AuthorizationRequest request)
{
var vm = new ViewModel
{
ClientName = request.Client.ClientName ?? request.Client.ClientId,
ClientUrl = request.Client.ClientUri,
ClientLogoUrl = request.Client.LogoUri,
AllowRememberConsent = request.Client.AllowRememberConsent
};
vm.IdentityScopes = request.ValidatedResources.Resources.IdentityResources
.Select(x => CreateScopeViewModel(x, Input == null || Input.ScopesConsented.Contains(x.Name)))
.ToArray();
var resourceIndicators = request.Parameters.GetValues(OidcConstants.AuthorizeRequest.Resource) ?? Enumerable.Empty<string>();
var apiResources = request.ValidatedResources.Resources.ApiResources.Where(x => resourceIndicators.Contains(x.Name));
var apiScopes = new List<ScopeViewModel>();
foreach (var parsedScope in request.ValidatedResources.ParsedScopes)
{
var apiScope = request.ValidatedResources.Resources.FindApiScope(parsedScope.ParsedName);
if (apiScope != null)
{
var scopeVm = CreateScopeViewModel(parsedScope, apiScope, Input == null || Input.ScopesConsented.Contains(parsedScope.RawValue));
scopeVm.Resources = apiResources.Where(x => x.Scopes.Contains(parsedScope.ParsedName))
.Select(x => new ResourceViewModel
{
Name = x.Name,
DisplayName = x.DisplayName ?? x.Name,
}).ToArray();
apiScopes.Add(scopeVm);
}
}
if (ConsentOptions.EnableOfflineAccess && request.ValidatedResources.Resources.OfflineAccess)
{
apiScopes.Add(CreateOfflineAccessScope(Input == null || Input.ScopesConsented.Contains(Duende.IdentityServer.IdentityServerConstants.StandardScopes.OfflineAccess)));
}
vm.ApiScopes = apiScopes;
return vm;
}
private static ScopeViewModel CreateScopeViewModel(IdentityResource identity, bool check)
{
return new ScopeViewModel
{
Name = identity.Name,
Value = identity.Name,
DisplayName = identity.DisplayName ?? identity.Name,
Description = identity.Description,
Emphasize = identity.Emphasize,
Required = identity.Required,
Checked = check || identity.Required
};
}
private static ScopeViewModel CreateScopeViewModel(ParsedScopeValue parsedScopeValue, ApiScope apiScope, bool check)
{
var displayName = apiScope.DisplayName ?? apiScope.Name;
if (!String.IsNullOrWhiteSpace(parsedScopeValue.ParsedParameter))
{
displayName += ":" + parsedScopeValue.ParsedParameter;
}
return new ScopeViewModel
{
Name = parsedScopeValue.ParsedName,
Value = parsedScopeValue.RawValue,
DisplayName = displayName,
Description = apiScope.Description,
Emphasize = apiScope.Emphasize,
Required = apiScope.Required,
Checked = check || apiScope.Required
};
}
private static ScopeViewModel CreateOfflineAccessScope(bool check)
{
return new ScopeViewModel
{
Value = Duende.IdentityServer.IdentityServerConstants.StandardScopes.OfflineAccess,
DisplayName = ConsentOptions.OfflineAccessDisplayName,
Description = ConsentOptions.OfflineAccessDescription,
Emphasize = true,
Checked = check
};
}
}