diff options
Diffstat (limited to 'src/OpenID/OpenIdProviderMvc/Controllers/OpenIdController.cs')
| -rw-r--r-- | src/OpenID/OpenIdProviderMvc/Controllers/OpenIdController.cs | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/src/OpenID/OpenIdProviderMvc/Controllers/OpenIdController.cs b/src/OpenID/OpenIdProviderMvc/Controllers/OpenIdController.cs new file mode 100644 index 0000000..198c434 --- /dev/null +++ b/src/OpenID/OpenIdProviderMvc/Controllers/OpenIdController.cs @@ -0,0 +1,221 @@ +namespace OpenIdProviderMvc.Controllers { + using System; + using System.Collections.Generic; + using System.Linq; + using System.Web; + using System.Web.Mvc; + using System.Web.Mvc.Ajax; + using DotNetOpenAuth.Messaging; + using DotNetOpenAuth.OpenId; + using DotNetOpenAuth.OpenId.Behaviors; + using DotNetOpenAuth.OpenId.Extensions.ProviderAuthenticationPolicy; + using DotNetOpenAuth.OpenId.Extensions.SimpleRegistration; + using DotNetOpenAuth.OpenId.Provider; + using DotNetOpenAuth.OpenId.Provider.Behaviors; + using OpenIdProviderMvc.Code; + + public class OpenIdController : Controller { + internal static OpenIdProvider OpenIdProvider = new OpenIdProvider(); + + [ValidateInput(false)] + public ActionResult Provider() { + IRequest request = OpenIdProvider.GetRequest(); + if (request != null) { + // Some requests are automatically handled by DotNetOpenAuth. If this is one, go ahead and let it go. + if (request.IsResponseReady) { + return OpenIdProvider.PrepareResponse(request).AsActionResult(); + } + + // This is apparently one that the host (the web site itself) has to respond to. + ProviderEndpoint.PendingRequest = (IHostProcessedRequest)request; + + // Try responding immediately if possible. + ActionResult response; + if (this.AutoRespondIfPossible(out response)) { + return response; + } + + // We can't respond immediately with a positive result. But if we still have to respond immediately... + if (ProviderEndpoint.PendingRequest.Immediate) { + // We can't stop to prompt the user -- we must just return a negative response. + return this.SendAssertion(); + } + + return this.RedirectToAction("AskUser"); + } else { + // No OpenID request was recognized. This may be a user that stumbled on the OP Endpoint. + return this.View(); + } + } + + /// <summary> + /// Displays a confirmation page. + /// </summary> + /// <returns>The response for the user agent.</returns> + [Authorize] + public ActionResult AskUser() { + if (ProviderEndpoint.PendingRequest == null) { + // Oops... precious little we can confirm without a pending OpenID request. + return this.RedirectToAction("Index", "Home"); + } + + // The user MAY have just logged in. Try again to respond automatically to the RP if appropriate. + ActionResult response; + if (this.AutoRespondIfPossible(out response)) { + return response; + } + + this.ViewData["Realm"] = ProviderEndpoint.PendingRequest.Realm; + + return this.View(); + } + + [HttpPost, Authorize, ValidateAntiForgeryToken] + public ActionResult AskUserResponse(bool confirmed) { + if (ProviderEndpoint.PendingAnonymousRequest != null) { + ProviderEndpoint.PendingAnonymousRequest.IsApproved = confirmed; + } else if (ProviderEndpoint.PendingAuthenticationRequest != null) { + ProviderEndpoint.PendingAuthenticationRequest.IsAuthenticated = confirmed; + } else { + throw new InvalidOperationException("There's no pending authentication request!"); + } + + return this.SendAssertion(); + } + + /// <summary> + /// Sends a positive or a negative assertion, based on how the pending request is currently marked. + /// </summary> + /// <returns>An MVC redirect result.</returns> + public ActionResult SendAssertion() { + var pendingRequest = ProviderEndpoint.PendingRequest; + var authReq = pendingRequest as IAuthenticationRequest; + var anonReq = pendingRequest as IAnonymousRequest; + ProviderEndpoint.PendingRequest = null; // clear session static so we don't do this again + if (pendingRequest == null) { + throw new InvalidOperationException("There's no pending authentication request!"); + } + + // Set safe defaults if somehow the user ended up (perhaps through XSRF) here before electing to send data to the RP. + if (anonReq != null && !anonReq.IsApproved.HasValue) { + anonReq.IsApproved = false; + } + + if (authReq != null && !authReq.IsAuthenticated.HasValue) { + authReq.IsAuthenticated = false; + } + + if (authReq != null && authReq.IsAuthenticated.Value) { + if (authReq.IsDirectedIdentity) { + authReq.LocalIdentifier = Models.User.GetClaimedIdentifierForUser(User.Identity.Name); + } + + if (!authReq.IsDelegatedIdentifier) { + authReq.ClaimedIdentifier = authReq.LocalIdentifier; + } + } + + // Respond to AX/sreg extension requests only on a positive result. + if ((authReq != null && authReq.IsAuthenticated.Value) || + (anonReq != null && anonReq.IsApproved.Value)) { + // Look for a Simple Registration request. When the AXFetchAsSregTransform behavior is turned on + // in the web.config file as it is in this sample, AX requests will come in as SReg requests. + var claimsRequest = pendingRequest.GetExtension<ClaimsRequest>(); + if (claimsRequest != null) { + var claimsResponse = claimsRequest.CreateResponse(); + + // This simple respond to a request check may be enhanced to only respond to an individual attribute + // request if the user consents to it explicitly, in which case this response extension creation can take + // place in the confirmation page action rather than here. + if (claimsRequest.Email != DemandLevel.NoRequest) { + claimsResponse.Email = User.Identity.Name + "@dotnetopenauth.net"; + } + + pendingRequest.AddResponseExtension(claimsResponse); + } + } + + return OpenIdProvider.PrepareResponse(pendingRequest).AsActionResult(); + } + + /// <summary> + /// Attempts to formulate an automatic response to the RP if the user's profile allows it. + /// </summary> + /// <param name="response">Receives the ActionResult for the caller to return, or <c>null</c> if no automatic response can be made.</param> + /// <returns>A value indicating whether an automatic response is possible.</returns> + private bool AutoRespondIfPossible(out ActionResult response) { + // If the odds are good we can respond to this one immediately (without prompting the user)... + if (ProviderEndpoint.PendingRequest.IsReturnUrlDiscoverable(OpenIdProvider.Channel.WebRequestHandler) == RelyingPartyDiscoveryResult.Success + && User.Identity.IsAuthenticated + && this.HasUserAuthorizedAutoLogin(ProviderEndpoint.PendingRequest)) { + // Is this is an identity authentication request? (as opposed to an anonymous request)... + if (ProviderEndpoint.PendingAuthenticationRequest != null) { + // If this is directed identity, or if the claimed identifier being checked is controlled by the current user... + if (ProviderEndpoint.PendingAuthenticationRequest.IsDirectedIdentity + || this.UserControlsIdentifier(ProviderEndpoint.PendingAuthenticationRequest)) { + ProviderEndpoint.PendingAuthenticationRequest.IsAuthenticated = true; + response = this.SendAssertion(); + return true; + } + } + + // If this is an anonymous request, we can respond to that too. + if (ProviderEndpoint.PendingAnonymousRequest != null) { + ProviderEndpoint.PendingAnonymousRequest.IsApproved = true; + response = this.SendAssertion(); + return true; + } + } + + response = null; + return false; + } + + /// <summary> + /// Determines whether the currently logged in user has authorized auto login to the requesting relying party. + /// </summary> + /// <param name="request">The incoming request.</param> + /// <returns> + /// <c>true</c> if it is safe to respond affirmatively to this request and all extensions + /// without further user confirmation; otherwise, <c>false</c>. + /// </returns> + private bool HasUserAuthorizedAutoLogin(IHostProcessedRequest request) { + // TODO: host should implement this method meaningfully, consulting their user database. + // Make sure the user likes the RP + if (true/*User.UserLikesRP(request.Realm))*/) { + // And make sure the RP is only asking for information about the user that the user has granted before. + if (true/*User.HasGrantedExtensions(request)*/) { + // For now for the purposes of the sample, we'll disallow auto-logins when an sreg request is present. + if (request.GetExtension<ClaimsRequest>() != null) { + return false; + } + + return true; + } + } + + // If we aren't sure the user likes this site and is willing to disclose the requested info, return false + // so the user has the opportunity to explicity choose whether to share his/her info. + return false; + } + + /// <summary> + /// Checks whether the logged in user controls the OP local identifier in the given authentication request. + /// </summary> + /// <param name="authReq">The authentication request.</param> + /// <returns><c>true</c> if the user controls the identifier; <c>false</c> otherwise.</returns> + private bool UserControlsIdentifier(IAuthenticationRequest authReq) { + if (authReq == null) { + throw new ArgumentNullException("authReq"); + } + + if (User == null || User.Identity == null) { + return false; + } + + Uri userLocalIdentifier = Models.User.GetClaimedIdentifierForUser(User.Identity.Name); + return authReq.LocalIdentifier == userLocalIdentifier || + authReq.LocalIdentifier == PpidGeneration.PpidIdentifierProvider.GetIdentifier(userLocalIdentifier, authReq.Realm); + } + } +} |