Develop Reference

OAuth2 Authentication for connecting to EWS Server using Aspose is not working

I am very new to C# development and in my learning stage.
I'm currently working on upgrading the EWS Authentication from basic to Oauth authentication.
Following is my code
using JsonConvert = Newtonsoft.Json.JsonConvert;
using Aspose.Email.Clients;
using Aspose.Email.Common.Utils;
using Aspose.Email.Tests.TestUtils;
using Newtonsoft.Json;
using System;
using System.IO;
using System.Net;
using System.Text;
namespace TestNS
{
/// <summary>
/// Azure resource owner password credential (ROPC) token provider
/// https://learn.microsoft.com/en-us/azure/active-directory/develop/v2-oauth-ropc
/// https://portal.azure.com
/// https://developer.microsoft.com/en-us/graph/graph-explorer/#
/// token parser https://jwt.io
/// </summary>
internal class AzureROPCTokenProvider : ITokenProvider
{
private const string uriFormat = "https://login.microsoftonline.com/{0}/oauth2/v2.0/token";
private const string bodyFormat =
"client_id={0}" +
"&scope={1}" +
"&username={2}" +
"&password={3}" +
"&grant_type={4}";
private readonly string scope;
private const string grant_type = "password";
private readonly object tokenSyncObj = new object();
private OAuthToken token;
private readonly string tenant;
private readonly string clientId;
private readonly string clientSecret;
private readonly string userName;
private readonly string password;
/// <summary>
/// Initializes a new instance of the <see cref="AzureROPCTokenProvider"/> class
/// </summary>
/// <param name="tenant"></param>
/// <param name="clientId"></param>
/// <param name="clientSecret"></param>
/// <param name="scope"></param>
/// <param name="userName"></param>
/// <param name="password"></param>
/// <param name="scopeAr"></param>
public AzureROPCTokenProvider(
string tenant,
string clientId,
string clientSecret,
string userName,
string password,
string[] scopeAr)
{
this.tenant = tenant;
this.clientId = clientId;
this.clientSecret = clientSecret;
this.userName = userName;
this.password = password;
this.scope = string.Join(" ", scopeAr);
}
/// <summary>
/// Gets oAuth access token.
/// </summary>
/// <param name="ignoreExistingToken">
/// If ignoreExistingToken is true, requests new token from a server. Otherwise behaviour is depended on whether token exists or not.
/// If token exists and its expiration date is not expired returns current token, otherwise requests new token from a server.
/// </param>
/// <returns>Returns oAuth access token</returns>
public virtual OAuthToken GetAccessToken(bool ignoreExistingToken)
{
lock (tokenSyncObj)
{
if (this.token != null && !this.token.Expired && !ignoreExistingToken)
return this.token;
token = null;
string uri = string.Format(uriFormat, string.IsNullOrWhiteSpace(tenant) ? "common" : tenant);
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(uri);
string body = string.Format(bodyFormat,
HttpUtility.UrlEncode(clientId),
HttpUtility.UrlEncode(scope),
HttpUtility.UrlEncode(userName),
HttpUtility.UrlEncode(password),
HttpUtility.UrlEncode(grant_type));
byte[] bytes = Encoding.ASCII.GetBytes(body);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = bytes.Length;
MemoryStream ms = new MemoryStream(bytes);
using (Stream requestStream = request.GetRequestStream())
requestStream.Write(bytes, 0, bytes.Length);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
StringBuilder responseText = new StringBuilder();
bytes = new byte[1024];
int read = 0;
using (Stream stream = response.GetResponseStream())
{
while ((read = stream.Read(bytes, 0, bytes.Length)) > 0)
responseText.Append(Encoding.ASCII.GetString(bytes, 0, read));
}
string jsonString = responseText.ToString();
AzureTokenResponse t = JsonConvert.DeserializeObject<AzureTokenResponse>(jsonString);
token = new OAuthToken(
t.access_token,
TokenType.AccessToken,
DateTime.Now.AddSeconds(t.expires_in));
return token;
}
}
/// <summary>
/// Gets oAuth access token.
/// If token exists and its expiration date is not expired returns current token, otherwise requests new token from a server.
/// </summary>
/// <returns>Returns oAuth access token</returns>
public OAuthToken GetAccessToken()
{
return GetAccessToken(false);
}
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
public virtual void Dispose()
{
}
}
/// <summary>
/// A success response contains a JSON OAuth 2.0 response with the following parameters.
/// </summary>
public class AzureTokenResponse
{
/// <summary>
/// The requested access token. The calling web service can use this token to authenticate to the receiving web service.
/// </summary>
public string access_token { get; set; }
/// <summary>
/// Indicates the token type value. The only type that Azure AD supports is Bearer For more information about bearer tokens,
/// see The OAuth 2.0 Authorization Framework: Bearer Token Usage (RFC 6750).
/// </summary>
public string token_type { get; set; }
/// <summary>
/// How long the access token is valid (in seconds).
/// </summary>
public int expires_in { get; set; }
/// <summary>
/// How long the access token is valid (in seconds).
/// </summary>
public int ext_expires_in { get; set; }
/// <summary>
/// The time when the access token expires.
/// The date is represented as the number of seconds from 1970-01-01T00:00:00Z UTC until the expiration time.
/// This value is used to determine the lifetime of cached tokens.
/// </summary>
public int expires_on { get; set; }
/// <summary>
/// The App ID URI of the receiving web service.
/// </summary>
public string resource { get; set; }
/// <summary>
/// If an access token was returned, this parameter lists the scopes the access token is valid for.
/// </summary>
public string scope { get; set; }
/// <summary>
/// Issued if the original scope parameter included the openid scope.
/// </summary>
public string id_token { get; set; }
/// <summary>
/// Issued if the original scope parameter included offline_access.
/// </summary>
public string refresh_token { get; set; }
}
}
ITokenProvider tokenProvider = new AzureROPCTokenProvider(
"Tenant",
"ClientId",
"ClientSecret",
"EMail",
"Password",
scopes);
const string mailboxUri = "https://outlook.office365.com/ews/exchange.asmx";
ICredentials credentials = new OAuthNetworkCredential(tokenProvider);
using (IEWSClient ewsClient = EWSClient.GetEWSClient(mailboxUri, credentials))
{
}
However, am getting an error response as below
System.Net.WebException
HResult=0x80131509
Message=The remote server returned an error: (400) Bad Request.
Source=System
StackTrace:
at System.Net.HttpWebRequest.GetResponse()
at DataLoadLibrary.Emai.AzureROPCTokenProvider.GetAccessToken(Boolean ignoreExistingToken) in C:\path\to\file\DataLoadLibrary\Email\AzureROPCTokenProvider .cs:line 97
at DataLoadLibrary.Emai.AzureROPCTokenProvider.GetAccessToken() inC:\path\to\file\DataLoadLibrary\Email\AzureROPCTokenProvider .cs:line 123
at #=zh9Fqfcq_HoOXkObKc3_xqZJZ5tEDCTrUjh8nD$EvlR1sjwBuAg==.GetWebRequest(Uri #=zYomVKA4=)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at #=z59FR9EVW5_PdyTyl2BGNIgxEQwbI$$thui3I5Af7oPUiZ1$E9A==.GetFolder(GetFolderType GetFolder1)
at Aspose.Email.Clients.Exchange.WebService.EWSClient.GetEWSClient(String mailboxUri, ICredentials credentials, WebProxy proxy)
By going through the code I could find that it is not using the client secret which passed to the class. Then I have modified the body HttpUtility.UrlEncode(ClientSecret));. Unfortunately I am getting the same exception

Modern authentication (i.e. oAuth2 ) has been supported by EWS. Please read the following Aspose.Email article for more detail.
Access Mail Services using OAuth
You can download full code examples to use different permission types of modern authentication with EWS client from here:
With Delegated authentication - EWSModernAuthenticationDelegated.zip
With Application authentication - EWSModernAuthenticationApp.zip
Modern authentication with IMAP and SMTP clients - EWSModernAuthenticationImapSmtp.zip
I work with Aspose as Developer Evangelist.

Custom auth "The oauth state was missing or invalid"

My team and I created a custom OAuth to be used for external SSO. It works on localhost but as soon as we take it up to our staging environment we get an "The oauth state was missing or invalid." error.
We used "https://auth0.com/" for testing.
To try and troubleshoot this we overrode the following built in methods and via breakpoints can see that Query state comes back null.
protected override string BuildChallengeUrl(AuthenticationProperties properties, string redirectUri);
protected override async Task<HandleRequestResult> HandleRemoteAuthenticateAsync();
I need some help figuring out why this is a problem on staging and not on local as we are a bit stumped. A theory we have is that the decoder used inside these methods change on var properties = Options.StateDataFormat.Unprotect(state); and thus because they aren't the same they can't decode each others states. I will put our implementation below, if its required I can paste the built in methods as well but I can't fathom the problem lying with the built in functions.
Startup:
foreach (var customAuthItem in customAuthList)
{
services.AddAuthentication().AddCustom(customAuthItem.CampaignId, options =>
{
options.SignInScheme = IdentityServerConstants.ExternalCookieAuthenticationScheme;
options.AuthorizationEndpoint = customAuthItem.AuthEndpoint;
options.TokenEndpoint = customAuthItem.TokenEndpoint;
options.UserInformationEndpoint = customAuthItem.UserInfoEndpoint;
options.ClientId = customAuthItem.ClientId;
options.ClientSecret = customAuthItem.ClientSecret;
});
}
Options:
public class CustomAuthenticationOptions : OAuthOptions
{
/// <summary>
/// Initializes a new instance of the <see cref="CustomAuthenticationOptions"/> class.
/// </summary>
public CustomAuthenticationOptions()
{
ClaimsIssuer = CustomAuthenticationDefaults.Issuer;
CallbackPath = CustomAuthenticationDefaults.CallbackPath;
AuthorizationEndpoint = CustomAuthenticationDefaults.AuthorizationEndpoint;
TokenEndpoint = CustomAuthenticationDefaults.TokenEndpoint;
UserInformationEndpoint = CustomAuthenticationDefaults.UserInformationEndpoint;
Scope.Add("openid");
Scope.Add("profile");
Scope.Add("email");
ClaimActions.MapJsonKey(ClaimTypes.Email, "email");
ClaimActions.MapJsonKey(ClaimTypes.Name, "name");
ClaimActions.MapJsonKey(ClaimTypes.NameIdentifier, "sub");
}
/// Gets the list of fields to retrieve from the user information endpoint.
/// </summary>
public ISet<string> Fields { get; } = new HashSet<string>
{
"email",
"name",
"sub"
};
Defaults:
public static class CustomAuthenticationDefaults
{
/// <summary>
/// Default value for <see cref="AuthenticationScheme.Name"/>.
/// </summary>
public const string AuthenticationScheme = "Custom";
/// <summary>
/// Default value for <see cref="AuthenticationScheme.DisplayName"/>.
/// </summary>
public static readonly string DisplayName = "Custom";
/// <summary>
/// Default value for <see cref="AuthenticationSchemeOptions.ClaimsIssuer"/>.
/// </summary>
public static readonly string Issuer = "Custom";
/// <summary>
/// Default value for <see cref="RemoteAuthenticationOptions.CallbackPath"/>.
/// </summary>
public static readonly string CallbackPath = "/signin-custom";
/// <summary>
/// Default value for <see cref="OAuthOptions.AuthorizationEndpoint"/>.
/// </summary>
public static readonly string AuthorizationEndpoint = "https://dev-egd511ku.us.auth0.com/authorize";
/// <summary>
/// Default value for <see cref="OAuthOptions.TokenEndpoint"/>.
/// </summary>
public static readonly string TokenEndpoint = "https://dev-egd511ku.us.auth0.com/oauth/token";
/// <summary>
/// Default value for <see cref="OAuthOptions.UserInformationEndpoint"/>.
/// </summary>
public static readonly string UserInformationEndpoint = "https://dev-egd511ku.us.auth0.com/userinfo";
}
Handler:
protected override async Task<AuthenticationTicket> CreateTicketAsync(
[NotNull] ClaimsIdentity identity,
[NotNull] AuthenticationProperties properties,
[NotNull] OAuthTokenResponse tokens)
{
Serilog.Log.Debug("CustomAuthenticationHandler.CreateTicketAsync: STARTED!");
string endpoint = Options.UserInformationEndpoint;
if (Options.Fields.Count > 0)
{
endpoint = QueryHelpers.AddQueryString(endpoint, "fields", string.Join(',', Options.Fields));
}
using var request = new HttpRequestMessage(HttpMethod.Get, endpoint);
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", tokens.AccessToken);
Serilog.Log.Debug("CustomAuthenticationHandler.CreateTicketAsync: ABOUT TO SEND REQUEST!");
using var response = await Backchannel.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, Context.RequestAborted);
if (!response.IsSuccessStatusCode)
{
Serilog.Log.Debug($"CustomAuthenticationHandler.CreateTicketAsync: FAILED REQUEST: {response.ReasonPhrase}");
await Log.UserProfileErrorAsync(Logger, response, Context.RequestAborted);
throw new HttpRequestException("An error occurred while retrieving the user profile from Custom.");
}
var payloadString = await response.Content.ReadAsStringAsync();
Serilog.Log.Debug($"CustomAuthenticationHandler.CreateTicketAsync: PAYLOAD: {payloadString}");
using var payload = JsonDocument.Parse(payloadString);// Context.RequestAborted));
var principal = new ClaimsPrincipal(identity);
var context = new OAuthCreatingTicketContext(principal, properties, Context, Scheme, Options, Backchannel, tokens, payload.RootElement);
context.RunClaimActions();
await Events.CreatingTicket(context);
return new AuthenticationTicket(context.Principal!, context.Properties, Scheme.Name);
}
EDIT: The error is received after successful login and after being redirected back to our site. I can see through sentry breadcrumbs that the states are correct so it seems to be a decryption issue.

It turns out the problem is because I AddAuthentication() twice, it ignores the follow-up registration of the auth methods, resulting in only one OAuth working. This is a bit of a problem because we want to support multiple SSO options for our clients, but might need to figure out a different approach. I am just glad I finally know where the problem is.

Pass JSON data in a http GET request to a REST service

Using the following command:
curl -v -X GET -H "Content-Type: application/json" -d {'"mode":"0"'} http://host.domain.abc.com:23423/api/start-trial-api/
I am able to send the JSON data to web request and get the response back.
How can I do the same in C#?
I am able to POST data to the other service and get the response but don't understand how to send the data to GET request.
I tried searching on google and stackoverflow for the same in C#, but did not find anything.

Sample code - Make sure the request method is set to "GET"
string url = "";
var request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "GET";
request.ContentType = "application/json";
var webResponse = request.GetResponse();
using (var s = webResponse.GetResponseStream())
{
using (TextReader textReader = new StreamReader(s, true))
{
string jsonString = textReader.ReadToEnd();
}
}

Plenty of abstractions here, but hopefully will give a rough guide on how to connect to a service in C#
The Interface
public interface IShopifyAPIGateway
{
HttpResponseMessage Get(string path);
}
Shopify API Gateway, which instatiates HTTPClient()
public sealed class ShopifyAPIGateway : IShopifyAPIGateway
{
/// <summary>
///
/// </summary>
private Identity _identity;
/// <summary>
///
/// </summary>
private HttpClient _httpClient;
/// <summary>
///
/// </summary>
public ShopifyAPIGateway(Identity
identity)
{
_identity = identity;
_httpClient = new HttpClient(ClientHandler());
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public HttpResponseMessage Get(string path)
{
try
{
var response = Connect().GetAsync(path).Result;
return response;
}
catch (CustomHttpResponseException ex)
{
new Email().SendEmail(_identity.ClientName, "Http Response Error - Shopify API Module",
"Http Response Error - Shopify API Module: " + ex.Message,
"error#retain.me");
throw new CustomHttpResponseException(ex.Message);
}
}
/// <summary>
///
/// </summary>
/// <returns></returns>
private HttpClient Connect()
{
try
{
_httpClient.BaseAddress = new Uri(_identity.APIURL);
return _httpClient;
}
catch (CustomHttpRequestException ex)
{
throw new CustomHttpRequestException(ex.Message);
}
}
/// <summary>
///
/// </summary>
/// <param name="userKey"></param>
/// <returns></returns>
private HttpClientHandler ClientHandler()
{
try
{
return new HttpClientHandler()
{
Credentials = new NetworkCredential(_identity.APIKey,
_identity.Password),
PreAuthenticate = true
};
}
catch (CustomClientHandlerException ex)
{
throw new CustomClientHandlerException(ex.Message);
}
}
}
Generic repo to return any object(s) where the response object matches T
public sealed class EntityRepository<T> : IEntityRepository<T>
{
private IShopifyAPIGateway _gateWay;
public T Find(string path)
{
try
{
_gateWay = new ShopifyAPIGateway(_identity);
var json = _gateWay.Get(path).Content.ReadAsStringAsync();
T results = JsonConvert.DeserializeObject<T>(json.Result);
return results;
}
catch (System.Exception ex)
{
throw new ApplicationException(ex.Message);
}
}
}
Usage return type must match the Type your passing and also the Type that's being returned in response.
private IEnumerable<Order> Orders()
{
var entityRepo = new EntityRepository<Order>();
return entityRepo.Find("somedomain/api/orders?mode=0", _identity);
}

Unauthorized GET request for .NET Core RESTful web API

Yesterday I coded myself a simple RESTful web API in .NET Core (solution named Vault) with a single method that gets the profile of the user depending only on the Windows user name. I now have a second solution that will call some requests to my self-hosting service previously mentioned. When I use Postman, I can retrieve the data with ease when I call a GET on my only method in Vault, but when I build the URI in Mainframe and execute, I get an Unauthorized error and it confuses me as Vault does not require specific login like username and password. I also put a breakpoint in Vault and unlike when I'm using Postman, it does not reach my code when calling via the Mainframe solution.
Here where is build my REST request and call the service (GetProfile())
public VaultApiClient(ConfigurationManagerWrap configuration)
{
this.configuration = configuration;
this.client = new RestClient(new Uri(this.configuration.GetAppSetting<string>(ConfigurationKeys.VaultApiURL)));
}
/// <summary>
/// The get profile.
/// </summary>
/// <returns>
/// The <see cref="UserProfile"/>.
/// </returns>
public UserProfile GetProfile()
{
var request = new RestRequest("profile") { Method = Method.GET};
//request.AddParameter("profile", ParameterType.UrlSegment);
var response = this.client.Execute(request);
if (response.StatusCode != HttpStatusCode.OK)
{
throw new Exception(
$"Could not get the user profile ({response.StatusCode} {response.StatusDescription})");
}
return RestJsonSerializer.Default.Deserialize<UserProfile>(response);
}
Im hosting local so the base URI, aka ConfigurationKeys.VaultApiURL, is localhost5000/api/
My Mainframe controller :
public HomeController()
: this(new VaultApiClient(new ConfigurationManagerWrap()))
{
}
/// <summary>
/// Initializes a new instance of the <see cref="HomeController"/> class.
/// </summary>
/// <param name="vaultApiClient">
/// The vault api client.
/// </param>
public HomeController(IVaultApiClient vaultApiClient)
{
this.vaultApiClient = vaultApiClient;
}
/// <summary>
/// The index.
/// </summary>
/// <returns>
/// The <see cref="ActionResult"/>.
/// </returns>
public ActionResult Index()
{
var profile = this.GetProfile();
this.ViewBag.IsEdit = false;
this.ViewBag.IsError = false;
this.ViewBag.ErrorMessage = "";
if (this.TempData.ContainsKey("IsEdit"))
{
this.ViewBag.IsEdit = true;
this.TempData.Remove("IsEdit");
if (this.TempData.ContainsKey("ErrorMessage"))
{
this.ViewBag.IsError = true;
this.ViewBag.ErrorMessage = this.TempData["ErrorMessage"];
this.TempData.Remove("ErrorMessage");
}
}
return this.View("Index", profile);
}
private UserProfile GetProfile()
{
return this.vaultApiClient.GetProfile();
}
And here is the vault controller method that handles the GET request in question:
[HttpGet]
[Route("/api/Profile")]
[Produces(typeof(UserProfile))]
public IActionResult SearchProfile()
{
try
{
if (!this.currentuser.IsAuthenticated)
{
throw new Exception("This service does not support anonymous calls.");
}
var profile = Task.Run(() => this.personalizationService.GetUserProfileAsync(this.currentuser.GetCurrentWindowsIdentityName)).Result;
var userProfile = this.persistenceToDataModelConverter.Convert(profile);
userProfile.UserAdLogin = this.currentuser.GetCurrentWindowsIdentityName;
return this.Ok(userProfile);
}
catch (Exception ex)
{
return this.NotFound(ex);
}
}
Lastly, here are a few pics of before and when the error is thrown.

Credential information must be provided with client request in order to authenticate with the server.

2-legged OAuth with DotNetOpenAuth and Twitter. Getting a 401 error

I'm trying to get 2-legged oauth with twitter working to be able to retrieve tweets to display on websites. For this i want to use DotNetOpenAuth. To get me started i used the OAuthConsumer example that comes with DotNetOpenAuth.
Below is the codebehind code i have now. Here i use either the 3-legged part or the 2-legged part. The 3-legged part works fine (this is based on Twitter.aspx from the sample). The 2-legged part (based on GoogleApps2Legged.aspx) however gives a 401 error on twitter.RequestNewClientAccount();
private string AccessToken
{
get { return (string)Session["TwitterAccessToken"]; }
set { Session["TwitterAccessToken"] = value; }
}
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
// 3 legged
var twitter = new WebConsumer(TwitterConsumer.ServiceDescription, TwitterConsumer.ShortTermUserSessionTokenManager);
//// Is Twitter calling back with authorization?
var accessTokenResponse = twitter.ProcessUserAuthorization();
if (accessTokenResponse != null)
{
this.AccessToken = accessTokenResponse.AccessToken;
}
else if (this.AccessToken == null)
{
// If we don't yet have access, immediately request it.
twitter.Channel.Send(twitter.PrepareRequestUserAuthorization());
}
var response = TwitterConsumer.GetUserTimeLine(twitter, this.AccessToken);
// 2 legged
var twitter = new WebConsumer(TwitterConsumer.ServiceDescription, TwitterConsumer.ShortTermUserSessionTokenManager);
this.AccessToken = twitter.RequestNewClientAccount();
var response = twitter.PrepareAuthorizedRequestAndSend(TwitterConsumer.GetUserTimelineStatusEndpoint, this.AccessToken);
}
}
TwitterConsumer.cs
//-----------------------------------------------------------------------
// <copyright file="TwitterConsumer.cs" company="Outercurve Foundation">
// Copyright (c) Outercurve Foundation. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace DotNetOpenAuth.ApplicationBlock {
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Globalization;
using System.IO;
using System.Net;
using System.Web;
using System.Linq;
using System.Xml;
using System.Xml.Linq;
using System.Xml.XPath;
using DotNetOpenAuth.Messaging;
using DotNetOpenAuth.OAuth;
using DotNetOpenAuth.OAuth.ChannelElements;
/// <summary>
/// A consumer capable of communicating with Twitter.
/// </summary>
public static class TwitterConsumer {
/// <summary>
/// The description of Twitter's OAuth protocol URIs for use with actually reading/writing
/// a user's private Twitter data.
/// </summary>
public static readonly ServiceProviderDescription ServiceDescription = new ServiceProviderDescription {
RequestTokenEndpoint = new MessageReceivingEndpoint("https://api.twitter.com/oauth/request_token", HttpDeliveryMethods.GetRequest | HttpDeliveryMethods.AuthorizationHeaderRequest),
UserAuthorizationEndpoint = new MessageReceivingEndpoint("https://api.twitter.com/oauth/authorize", HttpDeliveryMethods.GetRequest | HttpDeliveryMethods.AuthorizationHeaderRequest),
AccessTokenEndpoint = new MessageReceivingEndpoint("https://api.twitter.com/oauth/access_token", HttpDeliveryMethods.PostRequest | HttpDeliveryMethods.AuthorizationHeaderRequest),
TamperProtectionElements = new ITamperProtectionChannelBindingElement[] { new HmacSha1SigningBindingElement() },
};
/// <summary>
/// The description of Twitter's OAuth protocol URIs for use with their "Sign in with Twitter" feature.
/// </summary>
public static readonly ServiceProviderDescription SignInWithTwitterServiceDescription = new ServiceProviderDescription {
RequestTokenEndpoint = new MessageReceivingEndpoint("https://api.twitter.com/oauth/request_token", HttpDeliveryMethods.GetRequest | HttpDeliveryMethods.AuthorizationHeaderRequest),
UserAuthorizationEndpoint = new MessageReceivingEndpoint("https://api.twitter.com/oauth/authenticate", HttpDeliveryMethods.GetRequest | HttpDeliveryMethods.AuthorizationHeaderRequest),
AccessTokenEndpoint = new MessageReceivingEndpoint("https://api.twitter.com/oauth/access_token", HttpDeliveryMethods.PostRequest | HttpDeliveryMethods.AuthorizationHeaderRequest),
TamperProtectionElements = new ITamperProtectionChannelBindingElement[] { new HmacSha1SigningBindingElement() },
};
/// <summary>
/// The URI to get a user's favorites.
/// </summary>
private static readonly MessageReceivingEndpoint GetFavoritesEndpoint = new MessageReceivingEndpoint("http://api.twitter.com/1/favorites.xml", HttpDeliveryMethods.GetRequest);
/// <summary>
/// The URI to get the data on the user's home page.
/// </summary>
public static readonly MessageReceivingEndpoint GetFriendTimelineStatusEndpoint = new MessageReceivingEndpoint("http://api.twitter.com/1/statuses/friends_timeline.xml", HttpDeliveryMethods.GetRequest);
public static readonly MessageReceivingEndpoint UpdateProfileBackgroundImageEndpoint = new MessageReceivingEndpoint("http://api.twitter.com/1/account/update_profile_background_image.xml", HttpDeliveryMethods.PostRequest | HttpDeliveryMethods.AuthorizationHeaderRequest);
public static readonly MessageReceivingEndpoint UpdateProfileImageEndpoint = new MessageReceivingEndpoint("http://api.twitter.com/1/account/update_profile_image.xml", HttpDeliveryMethods.PostRequest | HttpDeliveryMethods.AuthorizationHeaderRequest);
public static readonly MessageReceivingEndpoint VerifyCredentialsEndpoint = new MessageReceivingEndpoint("http://api.twitter.com/1/account/verify_credentials.xml", HttpDeliveryMethods.GetRequest | HttpDeliveryMethods.AuthorizationHeaderRequest);
public static readonly MessageReceivingEndpoint GetUserTimelineStatusEndpoint = new MessageReceivingEndpoint("http://api.twitter.com/1.1/statuses/user_timeline.json?screen_name=concepts2go", HttpDeliveryMethods.GetRequest);
/// <summary>
/// The consumer used for the Sign in to Twitter feature.
/// </summary>
private static WebConsumer signInConsumer;
/// <summary>
/// The lock acquired to initialize the <see cref="signInConsumer"/> field.
/// </summary>
private static object signInConsumerInitLock = new object();
/// <summary>
/// Initializes static members of the <see cref="TwitterConsumer"/> class.
/// </summary>
static TwitterConsumer() {
// Twitter can't handle the Expect 100 Continue HTTP header.
ServicePointManager.FindServicePoint(GetFavoritesEndpoint.Location).Expect100Continue = false;
}
/// <summary>
/// Gets a value indicating whether the Twitter consumer key and secret are set in the web.config file.
/// </summary>
public static bool IsTwitterConsumerConfigured {
get {
return true;
}
}
/// <summary>
/// Gets the consumer to use for the Sign in to Twitter feature.
/// </summary>
/// <value>The twitter sign in.</value>
private static WebConsumer TwitterSignIn {
get {
if (signInConsumer == null) {
lock (signInConsumerInitLock) {
if (signInConsumer == null) {
signInConsumer = new WebConsumer(SignInWithTwitterServiceDescription, ShortTermUserSessionTokenManager);
}
}
}
return signInConsumer;
}
}
public static InMemoryTokenManager ShortTermUserSessionTokenManager {
get {
var store = HttpContext.Current.Session;
var tokenManager = (InMemoryTokenManager)store["TwitterShortTermUserSessionTokenManager"];
if (tokenManager == null) {
string consumerKey = "dgnwPLz40rcvmGKn0SugfA";
string consumerSecret = "IvaV0cA3N146mXTXPH5EaEHX8XbULch1vwBYpeI4Xc";
if (IsTwitterConsumerConfigured) {
tokenManager = new InMemoryTokenManager(consumerKey, consumerSecret);
store["TwitterShortTermUserSessionTokenManager"] = tokenManager;
} else {
throw new InvalidOperationException("No Twitter OAuth consumer key and secret could be found in web.config AppSettings.");
}
}
return tokenManager;
}
}
public static XDocument GetUpdates(ConsumerBase twitter, string accessToken) {
IncomingWebResponse response = twitter.PrepareAuthorizedRequestAndSend(GetFriendTimelineStatusEndpoint, accessToken);
return XDocument.Load(XmlReader.Create(response.GetResponseReader()));
}
public static IncomingWebResponse GetUserTimeLine(ConsumerBase twitter, string accessToken)
{
IncomingWebResponse response = twitter.PrepareAuthorizedRequestAndSend(GetUserTimelineStatusEndpoint, accessToken);
return response;
//return XDocument.Load(XmlReader.Create(response.GetResponseReader()));
}
public static XDocument GetFavorites(ConsumerBase twitter, string accessToken) {
IncomingWebResponse response = twitter.PrepareAuthorizedRequestAndSend(GetFavoritesEndpoint, accessToken);
return XDocument.Load(XmlReader.Create(response.GetResponseReader()));
}
public static XDocument UpdateProfileBackgroundImage(ConsumerBase twitter, string accessToken, string image, bool tile) {
var parts = new[] {
MultipartPostPart.CreateFormFilePart("image", image, "image/" + Path.GetExtension(image).Substring(1).ToLowerInvariant()),
MultipartPostPart.CreateFormPart("tile", tile.ToString().ToLowerInvariant()),
};
HttpWebRequest request = twitter.PrepareAuthorizedRequest(UpdateProfileBackgroundImageEndpoint, accessToken, parts);
request.ServicePoint.Expect100Continue = false;
IncomingWebResponse response = twitter.Channel.WebRequestHandler.GetResponse(request);
string responseString = response.GetResponseReader().ReadToEnd();
return XDocument.Parse(responseString);
}
public static XDocument UpdateProfileImage(ConsumerBase twitter, string accessToken, string pathToImage) {
string contentType = "image/" + Path.GetExtension(pathToImage).Substring(1).ToLowerInvariant();
return UpdateProfileImage(twitter, accessToken, File.OpenRead(pathToImage), contentType);
}
public static XDocument UpdateProfileImage(ConsumerBase twitter, string accessToken, Stream image, string contentType) {
var parts = new[] {
MultipartPostPart.CreateFormFilePart("image", "twitterPhoto", contentType, image),
};
HttpWebRequest request = twitter.PrepareAuthorizedRequest(UpdateProfileImageEndpoint, accessToken, parts);
IncomingWebResponse response = twitter.Channel.WebRequestHandler.GetResponse(request);
string responseString = response.GetResponseReader().ReadToEnd();
return XDocument.Parse(responseString);
}
public static XDocument VerifyCredentials(ConsumerBase twitter, string accessToken) {
IncomingWebResponse response = twitter.PrepareAuthorizedRequestAndSend(VerifyCredentialsEndpoint, accessToken);
return XDocument.Load(XmlReader.Create(response.GetResponseReader()));
}
public static string GetUsername(ConsumerBase twitter, string accessToken) {
XDocument xml = VerifyCredentials(twitter, accessToken);
XPathNavigator nav = xml.CreateNavigator();
return nav.SelectSingleNode("/user/screen_name").Value;
}
/// <summary>
/// Prepares a redirect that will send the user to Twitter to sign in.
/// </summary>
/// <param name="forceNewLogin">if set to <c>true</c> the user will be required to re-enter their Twitter credentials even if already logged in to Twitter.</param>
/// <returns>The redirect message.</returns>
/// <remarks>
/// Call <see cref="OutgoingWebResponse.Send"/> or
/// <c>return StartSignInWithTwitter().<see cref="MessagingUtilities.AsActionResult">AsActionResult()</see></c>
/// to actually perform the redirect.
/// </remarks>
public static OutgoingWebResponse StartSignInWithTwitter(bool forceNewLogin) {
var redirectParameters = new Dictionary<string, string>();
if (forceNewLogin) {
redirectParameters["force_login"] = "true";
}
Uri callback = MessagingUtilities.GetRequestUrlFromContext().StripQueryArgumentsWithPrefix("oauth_");
var request = TwitterSignIn.PrepareRequestUserAuthorization(callback, null, redirectParameters);
return TwitterSignIn.Channel.PrepareResponse(request);
}
/// <summary>
/// Checks the incoming web request to see if it carries a Twitter authentication response,
/// and provides the user's Twitter screen name and unique id if available.
/// </summary>
/// <param name="screenName">The user's Twitter screen name.</param>
/// <param name="userId">The user's Twitter unique user ID.</param>
/// <returns>
/// A value indicating whether Twitter authentication was successful;
/// otherwise <c>false</c> to indicate that no Twitter response was present.
/// </returns>
public static bool TryFinishSignInWithTwitter(out string screenName, out int userId) {
screenName = null;
userId = 0;
var response = TwitterSignIn.ProcessUserAuthorization();
if (response == null) {
return false;
}
screenName = response.ExtraData["screen_name"];
userId = int.Parse(response.ExtraData["user_id"]);
// If we were going to make this LOOK like OpenID even though it isn't,
// this seems like a reasonable, secure claimed id to allow the user to assume.
OpenId.Identifier fake_claimed_id = string.Format(CultureInfo.InvariantCulture, "http://twitter.com/{0}#{1}", screenName, userId);
return true;
}
}
}
InMemoryTokenManager.cs
//-----------------------------------------------------------------------
// <copyright file="InMemoryTokenManager.cs" company="Outercurve Foundation">
// Copyright (c) Outercurve Foundation. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace DotNetOpenAuth.ApplicationBlock {
using System;
using System.Collections.Generic;
using System.Diagnostics;
using DotNetOpenAuth.OAuth.ChannelElements;
using DotNetOpenAuth.OAuth.Messages;
using DotNetOpenAuth.OpenId.Extensions.OAuth;
/// <summary>
/// A token manager that only retains tokens in memory.
/// Meant for SHORT TERM USE TOKENS ONLY.
/// </summary>
/// <remarks>
/// A likely application of this class is for "Sign In With Twitter",
/// where the user only signs in without providing any authorization to access
/// Twitter APIs except to authenticate, since that access token is only useful once.
/// </remarks>
public class InMemoryTokenManager : IConsumerTokenManager, IOpenIdOAuthTokenManager {
private Dictionary<string, string> tokensAndSecrets = new Dictionary<string, string>();
/// <summary>
/// Initializes a new instance of the <see cref="InMemoryTokenManager"/> class.
/// </summary>
/// <param name="consumerKey">The consumer key.</param>
/// <param name="consumerSecret">The consumer secret.</param>
public InMemoryTokenManager(string consumerKey, string consumerSecret) {
if (string.IsNullOrEmpty(consumerKey)) {
throw new ArgumentNullException("consumerKey");
}
this.ConsumerKey = consumerKey;
this.ConsumerSecret = consumerSecret;
}
/// <summary>
/// Gets the consumer key.
/// </summary>
/// <value>The consumer key.</value>
public string ConsumerKey { get; private set; }
/// <summary>
/// Gets the consumer secret.
/// </summary>
/// <value>The consumer secret.</value>
public string ConsumerSecret { get; private set; }
#region ITokenManager Members
/// <summary>
/// Gets the Token Secret given a request or access token.
/// </summary>
/// <param name="token">The request or access token.</param>
/// <returns>
/// The secret associated with the given token.
/// </returns>
/// <exception cref="ArgumentException">Thrown if the secret cannot be found for the given token.</exception>
public string GetTokenSecret(string token) {
return this.tokensAndSecrets[token];
}
/// <summary>
/// Stores a newly generated unauthorized request token, secret, and optional
/// application-specific parameters for later recall.
/// </summary>
/// <param name="request">The request message that resulted in the generation of a new unauthorized request token.</param>
/// <param name="response">The response message that includes the unauthorized request token.</param>
/// <exception cref="ArgumentException">Thrown if the consumer key is not registered, or a required parameter was not found in the parameters collection.</exception>
/// <remarks>
/// Request tokens stored by this method SHOULD NOT associate any user account with this token.
/// It usually opens up security holes in your application to do so. Instead, you associate a user
/// account with access tokens (not request tokens) in the <see cref="ExpireRequestTokenAndStoreNewAccessToken"/>
/// method.
/// </remarks>
public void StoreNewRequestToken(UnauthorizedTokenRequest request, ITokenSecretContainingMessage response) {
this.tokensAndSecrets[response.Token] = response.TokenSecret;
}
/// <summary>
/// Deletes a request token and its associated secret and stores a new access token and secret.
/// </summary>
/// <param name="consumerKey">The Consumer that is exchanging its request token for an access token.</param>
/// <param name="requestToken">The Consumer's request token that should be deleted/expired.</param>
/// <param name="accessToken">The new access token that is being issued to the Consumer.</param>
/// <param name="accessTokenSecret">The secret associated with the newly issued access token.</param>
/// <remarks>
/// <para>
/// Any scope of granted privileges associated with the request token from the
/// original call to <see cref="StoreNewRequestToken"/> should be carried over
/// to the new Access Token.
/// </para>
/// <para>
/// To associate a user account with the new access token,
/// <see cref="System.Web.HttpContext.User">HttpContext.Current.User</see> may be
/// useful in an ASP.NET web application within the implementation of this method.
/// Alternatively you may store the access token here without associating with a user account,
/// and wait until <see cref="WebConsumer.ProcessUserAuthorization()"/> or
/// <see cref="DesktopConsumer.ProcessUserAuthorization(string, string)"/> return the access
/// token to associate the access token with a user account at that point.
/// </para>
/// </remarks>
public void ExpireRequestTokenAndStoreNewAccessToken(string consumerKey, string requestToken, string accessToken, string accessTokenSecret) {
this.tokensAndSecrets.Remove(requestToken);
this.tokensAndSecrets[accessToken] = accessTokenSecret;
}
/// <summary>
/// Classifies a token as a request token or an access token.
/// </summary>
/// <param name="token">The token to classify.</param>
/// <returns>Request or Access token, or invalid if the token is not recognized.</returns>
public TokenType GetTokenType(string token) {
throw new NotImplementedException();
}
#endregion
#region IOpenIdOAuthTokenManager Members
/// <summary>
/// Stores a new request token obtained over an OpenID request.
/// </summary>
/// <param name="consumerKey">The consumer key.</param>
/// <param name="authorization">The authorization message carrying the request token and authorized access scope.</param>
/// <remarks>
/// <para>The token secret is the empty string.</para>
/// <para>Tokens stored by this method should be short-lived to mitigate
/// possible security threats. Their lifetime should be sufficient for the
/// relying party to receive the positive authentication assertion and immediately
/// send a follow-up request for the access token.</para>
/// </remarks>
public void StoreOpenIdAuthorizedRequestToken(string consumerKey, AuthorizationApprovedResponse authorization) {
this.tokensAndSecrets[authorization.RequestToken] = string.Empty;
}
#endregion
}
}

Twitter doesn't really support what I call 2-legged OAuth. It only does "0-legged OAuth". Since the ConsumerBase.RequestNewClientAccount method that you're calling is for 2-legged OAuth, it's failing.
For 0-legged OAuth, you need to create an InMemoryTokenManager that is prefilled with your consumer key, secret and access token and secret. Then pass that token manager into your ConsumerBase-derived type (WebConsumer or DesktopConsumer) and begin making authorized calls.
Or much more simply, you can download the DotNetOpenAuth v4.3 preview that includes an DelegatingHandler where you can completely skip the above steps and just inject your key, token and secrets into one simple method and start making calls with HttpClient that are automatically OAuth 1 signed.