protected override async Task <AuthenticationTicket> AuthenticateCoreAsync()
{
AuthenticationProperties properties = null;
try
{
IReadableStringCollection query = Request.Query;
string protectedRequestToken = Request.Cookies[StateCookie];
RequestToken requestToken = Options.StateDataFormat.Unprotect(protectedRequestToken);
if (requestToken == null)
{
_logger.WriteWarning("Invalid state");
return(null);
}
properties = requestToken.Properties;
string returnedToken = query.Get("oauth_token");
if (string.IsNullOrWhiteSpace(returnedToken))
{
_logger.WriteWarning("Missing oauth_token");
return(new AuthenticationTicket(null, properties));
}
if (returnedToken != requestToken.Token)
{
_logger.WriteWarning("Unmatched token");
return(new AuthenticationTicket(null, properties));
}
string oauthVerifier = query.Get("oauth_verifier");
if (string.IsNullOrWhiteSpace(oauthVerifier))
{
_logger.WriteWarning("Missing or blank oauth_verifier");
return(new AuthenticationTicket(null, properties));
}
AccessToken accessToken = await ObtainAccessTokenAsync(Options.ConsumerKey, Options.ConsumerSecret, requestToken, oauthVerifier);
var context = new TwitterAuthenticatedContext(Context, accessToken.UserId, accessToken.ScreenName, accessToken.Token, accessToken.TokenSecret);
context.Identity = new ClaimsIdentity(
new[]
{
new Claim(ClaimTypes.NameIdentifier, accessToken.UserId, "http://www.w3.org/2001/XMLSchema#string", Options.AuthenticationType),
new Claim(ClaimTypes.Name, accessToken.ScreenName, "http://www.w3.org/2001/XMLSchema#string", Options.AuthenticationType),
new Claim("urn:twitter:userid", accessToken.UserId, "http://www.w3.org/2001/XMLSchema#string", Options.AuthenticationType),
new Claim("urn:twitter:screenname", accessToken.ScreenName, "http://www.w3.org/2001/XMLSchema#string", Options.AuthenticationType)
},
Options.AuthenticationType,
ClaimsIdentity.DefaultNameClaimType,
ClaimsIdentity.DefaultRoleClaimType);
context.Properties = requestToken.Properties;
Response.Cookies.Delete(StateCookie);
await Options.Provider.Authenticated(context);
return(new AuthenticationTicket(context.Identity, context.Properties));
}
catch (Exception ex)
{
_logger.WriteError("Authentication failed", ex);
return(new AuthenticationTicket(null, properties));
}
}
/// <summary>
/// Invoked whenever Twitter succesfully authenticates a user
/// </summary>
/// <param name="context">Contains information about the login session as well as the user <see cref="System.Security.Claims.ClaimsIdentity"/>.</param>
/// <returns>A <see cref="Task"/> representing the completed operation.</returns>
public virtual Task Authenticated(TwitterAuthenticatedContext context)
{
return(OnAuthenticated(context));
}