/// <summary>
/// Invoked whenever VanLang 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(VanLangAuthenticatedContext context)
{
return(OnAuthenticated(context));
}
protected override async Task <AuthenticationTicket> AuthenticateCoreAsync()
{
AuthenticationProperties properties = null;
try
{
string code = null;
string state = null;
IReadableStringCollection query = Request.Query;
IList <string> values = query.GetValues("error");
if (values != null && values.Count >= 1)
{
_logger.WriteVerbose("Remote server returned an error: " + Request.QueryString);
}
values = query.GetValues("code");
if (values != null && values.Count == 1)
{
code = values[0];
}
values = query.GetValues("state");
if (values != null && values.Count == 1)
{
state = values[0];
}
properties = Options.StateDataFormat.Unprotect(state);
if (properties == null)
{
return(null);
}
if (code == null)
{
// Null if the remote server returns an error.
return(new AuthenticationTicket(null, properties));
}
string requestPrefix = Request.Scheme + "://" + Request.Host;
string redirectUri = requestPrefix + Request.PathBase + Options.CallbackPath;
var formContent = new FormUrlEncodedContent(new[]
{
new KeyValuePair <string, string>("code", Uri.EscapeDataString(code))
});
HttpResponseMessage tokenResponse = await _httpClient.PostAsync(Options.UserInformationEndpoint, formContent, Request.CallCancelled);
tokenResponse.EnsureSuccessStatusCode();
string user = await tokenResponse.Content.ReadAsStringAsync();
JObject response = JObject.Parse(user);
string accessToken = response.Value <string>("access_token");
if (string.IsNullOrWhiteSpace(accessToken))
{
_logger.WriteWarning("Access token was not found");
return(new AuthenticationTicket(null, properties));
}
var email = response.Value <string>("Email");
var defaultUserName = response.Value <string>("DefaultUserName");
var context = new VanLangAuthenticatedContext(Context);
context.Identity = new ClaimsIdentity(
Options.AuthenticationType,
ClaimsIdentity.DefaultNameClaimType,
ClaimsIdentity.DefaultRoleClaimType);
context.Identity.AddClaim(new Claim(ClaimTypes.NameIdentifier, accessToken, XmlSchemaString, Options.AuthenticationType));
if (!string.IsNullOrEmpty(defaultUserName))
{
context.Identity.AddClaim(new Claim(ClaimsIdentity.DefaultNameClaimType, defaultUserName, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(email))
{
context.Identity.AddClaim(new Claim(ClaimTypes.Email, email, XmlSchemaString, Options.AuthenticationType));
}
context.Properties = properties;
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));
}
}