protected override async Task ApplyResponseGrantAsync()
{
AuthenticationResponseRevoke signout = Helper.LookupSignOut(Options.AuthenticationType, Options.AuthenticationMode);
if (signout != null)
{
AuthenticationProperties properties = signout.Properties;
B2CConfigurationManager mgr = Options.ConfigurationManager as B2CConfigurationManager;
_configuration = await mgr.GetConfigurationAsync(Context.Request.CallCancelled, "b2c_1_sign_in");
OpenIdConnectMessage openIdConnectMessage = new OpenIdConnectMessage()
{
IssuerAddress = _configuration.EndSessionEndpoint ?? string.Empty,
RequestType = OpenIdConnectRequestType.LogoutRequest,
};
string redirect = string.Empty;
if (properties != null && !string.IsNullOrEmpty(properties.RedirectUri))
{
openIdConnectMessage.PostLogoutRedirectUri = properties.RedirectUri;
redirect = properties.RedirectUri;
}
else if (!string.IsNullOrWhiteSpace(Options.PostLogoutRedirectUri))
{
openIdConnectMessage.PostLogoutRedirectUri = Options.PostLogoutRedirectUri;
redirect = Options.RedirectUri;
}
if (string.IsNullOrWhiteSpace(openIdConnectMessage.PostLogoutRedirectUri))
{
throw new Exception("For B2C, the PostLogoutRedirectUri is required.");
}
if (string.IsNullOrWhiteSpace(redirect))
{
throw new Exception("For B2C, the RedirectUri is required.");
}
var notification = new RedirectToIdentityProviderNotification <OpenIdConnectMessage, OpenIdConnectAuthenticationOptions>(Context, Options)
{
ProtocolMessage = openIdConnectMessage
};
await Options.Notifications.RedirectToIdentityProvider(notification);
if (!notification.HandledResponse)
{
string redirectUri = notification.ProtocolMessage.CreateLogoutRequestUrl();
redirectUri = redirectUri + "&" + OpenIdConnectParameterNames.RedirectUri + "=" + HttpUtility.UrlEncode(redirect) + "&" + OpenIdConnectParameterNames.ClientId + "=" + Options.ClientId;
if (!Uri.IsWellFormedUriString(redirectUri, UriKind.Absolute))
{
_logger.WriteWarning("The logout redirect URI is malformed: " + redirectUri);
}
Response.Redirect(redirectUri);
}
}
}
protected override async Task <AuthenticationTicket> AuthenticateCoreAsync()
{
if (Options.CallbackPath.HasValue && Options.CallbackPath != (Request.PathBase + Request.Path))
{
return(null);
}
OpenIdConnectMessage openIdConnectMessage = null;
if (string.Equals(Request.Method, "POST", StringComparison.OrdinalIgnoreCase) &&
!string.IsNullOrWhiteSpace(Request.ContentType) &&
Request.ContentType.StartsWith("application/x-www-form-urlencoded", StringComparison.OrdinalIgnoreCase) &&
Request.Body.CanRead)
{
if (!Request.Body.CanSeek)
{
_logger.WriteVerbose("Buffering request body");
MemoryStream memoryStream = new MemoryStream();
await Request.Body.CopyToAsync(memoryStream);
memoryStream.Seek(0, SeekOrigin.Begin);
Request.Body = memoryStream;
}
IFormCollection form = await Request.ReadFormAsync();
Request.Body.Seek(0, SeekOrigin.Begin);
openIdConnectMessage = new OpenIdConnectMessage(form);
}
if (openIdConnectMessage == null)
{
return(null);
}
ExceptionDispatchInfo authFailedEx = null;
string policy = string.Empty;
try
{
var messageReceivedNotification = new MessageReceivedNotification <OpenIdConnectMessage, OpenIdConnectAuthenticationOptions>(Context, Options)
{
ProtocolMessage = openIdConnectMessage
};
await Options.Notifications.MessageReceived(messageReceivedNotification);
if (messageReceivedNotification.HandledResponse)
{
return(GetHandledResponseTicket());
}
if (messageReceivedNotification.Skipped)
{
return(null);
}
AuthenticationProperties properties = GetPropertiesFromState(openIdConnectMessage.State);
if (properties == null)
{
_logger.WriteWarning("The state field is missing or invalid.");
return(null);
}
string nonce = null;
if (Options.ProtocolValidator.RequireNonce)
{
nonce = RetrieveNonce(openIdConnectMessage);
}
if (!string.IsNullOrWhiteSpace(openIdConnectMessage.Error))
{
throw new OpenIdConnectProtocolException(
string.Format(CultureInfo.InvariantCulture,
openIdConnectMessage.Error,
"", openIdConnectMessage.ErrorDescription ?? string.Empty, openIdConnectMessage.ErrorUri ?? string.Empty));
}
if (string.IsNullOrWhiteSpace(openIdConnectMessage.IdToken))
{
_logger.WriteWarning("The id_token is missing.");
return(null);
}
var securityTokenReceivedNotification = new SecurityTokenReceivedNotification <OpenIdConnectMessage, OpenIdConnectAuthenticationOptions>(Context, Options)
{
ProtocolMessage = openIdConnectMessage,
};
await Options.Notifications.SecurityTokenReceived(securityTokenReceivedNotification);
if (securityTokenReceivedNotification.HandledResponse)
{
return(GetHandledResponseTicket());
}
if (securityTokenReceivedNotification.Skipped)
{
return(null);
}
// Enable Per-Policy Metadata Retreival
if (properties.Dictionary.TryGetValue(PolicyParameter, out policy))
{
B2CConfigurationManager mgr = Options.ConfigurationManager as B2CConfigurationManager;
_configuration = await mgr.GetConfigurationAsync(Context.Request.CallCancelled, policy);
}
else
{
_logger.WriteWarning("No policy identifier was found in the Authentication Properties of the request.");
return(null);
}
TokenValidationParameters tvp = Options.TokenValidationParameters.Clone();
IEnumerable <string> issuers = new[] { _configuration.Issuer };
tvp.ValidIssuers = (tvp.ValidIssuers == null ? issuers : tvp.ValidIssuers.Concat(issuers));
tvp.IssuerSigningTokens = (tvp.IssuerSigningTokens == null ? _configuration.SigningTokens : tvp.IssuerSigningTokens.Concat(_configuration.SigningTokens));
SecurityToken validatedToken;
ClaimsPrincipal principal = Options.SecurityTokenHandlers.ValidateToken(openIdConnectMessage.IdToken, tvp, out validatedToken);
ClaimsIdentity claimsIdentity = principal.Identity as ClaimsIdentity;
JwtSecurityToken jwt = validatedToken as JwtSecurityToken;
AuthenticationTicket ticket = new AuthenticationTicket(claimsIdentity, properties);
if (!string.IsNullOrWhiteSpace(openIdConnectMessage.SessionState))
{
ticket.Properties.Dictionary[OpenIdConnectSessionProperties.SessionState] = openIdConnectMessage.SessionState;
}
if (!string.IsNullOrWhiteSpace(_configuration.CheckSessionIframe))
{
ticket.Properties.Dictionary[OpenIdConnectSessionProperties.CheckSessionIFrame] = _configuration.CheckSessionIframe;
}
if (Options.UseTokenLifetime)
{
DateTime issued = jwt.ValidFrom;
if (issued != DateTime.MinValue)
{
ticket.Properties.IssuedUtc = issued.ToUniversalTime();
}
DateTime expires = jwt.ValidTo;
if (expires != DateTime.MinValue)
{
ticket.Properties.ExpiresUtc = expires.ToUniversalTime();
}
ticket.Properties.AllowRefresh = false;
}
var securityTokenValidatedNotification = new SecurityTokenValidatedNotification <OpenIdConnectMessage, OpenIdConnectAuthenticationOptions>(Context, Options)
{
AuthenticationTicket = ticket,
ProtocolMessage = openIdConnectMessage,
};
await Options.Notifications.SecurityTokenValidated(securityTokenValidatedNotification);
if (securityTokenValidatedNotification.HandledResponse)
{
return(GetHandledResponseTicket());
}
if (securityTokenValidatedNotification.Skipped)
{
return(null);
}
ticket = securityTokenValidatedNotification.AuthenticationTicket;
var protocolValidationContext = new OpenIdConnectProtocolValidationContext
{
AuthorizationCode = openIdConnectMessage.Code,
Nonce = nonce,
};
Options.ProtocolValidator.Validate(jwt, protocolValidationContext);
if (openIdConnectMessage.Code != null)
{
var authorizationCodeReceivedNotification = new AuthorizationCodeReceivedNotification(Context, Options)
{
AuthenticationTicket = ticket,
Code = openIdConnectMessage.Code,
JwtSecurityToken = jwt,
ProtocolMessage = openIdConnectMessage,
RedirectUri = ticket.Properties.Dictionary.ContainsKey(OpenIdConnectAuthenticationDefaults.RedirectUriUsedForCodeKey) ?
ticket.Properties.Dictionary[OpenIdConnectAuthenticationDefaults.RedirectUriUsedForCodeKey] : string.Empty,
};
await Options.Notifications.AuthorizationCodeReceived(authorizationCodeReceivedNotification);
if (authorizationCodeReceivedNotification.HandledResponse)
{
return(GetHandledResponseTicket());
}
if (authorizationCodeReceivedNotification.Skipped)
{
return(null);
}
ticket = authorizationCodeReceivedNotification.AuthenticationTicket;
}
return(ticket);
}
catch (Exception exception)
{
authFailedEx = ExceptionDispatchInfo.Capture(exception);
}
if (authFailedEx != null)
{
_logger.WriteError("Exception occurred while processing message: '" + authFailedEx.ToString());
if (Options.RefreshOnIssuerKeyNotFound && authFailedEx.SourceException.GetType().Equals(typeof(SecurityTokenSignatureKeyNotFoundException)))
{
B2CConfigurationManager mgr = Options.ConfigurationManager as B2CConfigurationManager;
mgr.RequestRefresh(policy);
}
var authenticationFailedNotification = new AuthenticationFailedNotification <OpenIdConnectMessage, OpenIdConnectAuthenticationOptions>(Context, Options)
{
ProtocolMessage = openIdConnectMessage,
Exception = authFailedEx.SourceException
};
await Options.Notifications.AuthenticationFailed(authenticationFailedNotification);
if (authenticationFailedNotification.HandledResponse)
{
return(GetHandledResponseTicket());
}
if (authenticationFailedNotification.Skipped)
{
return(null);
}
authFailedEx.Throw();
}
return(null);
}
protected override async Task ApplyResponseChallengeAsync()
{
if (Response.StatusCode == 401)
{
AuthenticationResponseChallenge challenge = Helper.LookupChallenge(Options.AuthenticationType, Options.AuthenticationMode);
if (challenge == null)
{
return;
}
AuthenticationProperties properties = challenge.Properties;
if (string.IsNullOrEmpty(properties.RedirectUri))
{
properties.RedirectUri = CurrentUri;
}
if (!string.IsNullOrWhiteSpace(Options.RedirectUri))
{
properties.Dictionary.Add(OpenIdConnectAuthenticationDefaults.RedirectUriUsedForCodeKey, Options.RedirectUri);
}
// Enable Per-Policy Metadata Retreival
string policy;
if (properties.Dictionary.TryGetValue(PolicyParameter, out policy))
{
B2CConfigurationManager mgr = Options.ConfigurationManager as B2CConfigurationManager;
_configuration = await mgr.GetConfigurationAsync(Context.Request.CallCancelled, policy);
}
else
{
throw new Exception("For B2C, you must pass a policy parameter in every challenge.");
return;
}
OpenIdConnectMessage openIdConnectMessage = new OpenIdConnectMessage
{
ClientId = Options.ClientId,
IssuerAddress = _configuration.AuthorizationEndpoint ?? string.Empty,
RedirectUri = Options.RedirectUri,
RequestType = OpenIdConnectRequestType.AuthenticationRequest,
Resource = Options.Resource,
ResponseMode = OpenIdConnectResponseModes.FormPost,
ResponseType = Options.ResponseType,
Scope = Options.Scope,
State = AuthenticationPropertiesKey + "=" + Uri.EscapeDataString(Options.StateDataFormat.Protect(properties)),
};
if (Options.ProtocolValidator.RequireNonce)
{
AddNonceToMessage(openIdConnectMessage);
}
var notification = new RedirectToIdentityProviderNotification <OpenIdConnectMessage, OpenIdConnectAuthenticationOptions>(Context, Options)
{
ProtocolMessage = openIdConnectMessage
};
await Options.Notifications.RedirectToIdentityProvider(notification);
if (!notification.HandledResponse)
{
string redirectUri = notification.ProtocolMessage.CreateAuthenticationRequestUrl();
if (!Uri.IsWellFormedUriString(redirectUri, UriKind.Absolute))
{
_logger.WriteWarning("The authenticate redirect URI is malformed: " + redirectUri);
}
Response.Redirect(redirectUri);
}
}
return;
}