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
}));
}
}
