public void IsConfidential_ReturnsExpectedResult(string level, bool result)
{
// Arrange
var ticket = new AuthenticationTicket(
new ClaimsIdentity(),
new AuthenticationProperties());
ticket.Properties.Dictionary[OpenIdConnectConstants.Properties.ConfidentialityLevel] = level;
// Act and assert
Assert.Equal(result, ticket.IsConfidential());
}
private async Task <bool> InvokeRevocationEndpointAsync()
{
if (!string.Equals(Request.Method, "POST", StringComparison.OrdinalIgnoreCase))
{
Logger.LogError("The revocation request was rejected because an invalid " +
"HTTP method was specified: {Method}.", Request.Method);
return(await SendRevocationResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The specified HTTP method is not valid."
}));
}
// See http://openid.net/specs/openid-connect-core-1_0.html#FormSerialization
if (string.IsNullOrEmpty(Request.ContentType))
{
Logger.LogError("The revocation request was rejected because " +
"the mandatory 'Content-Type' header was missing.");
return(await SendRevocationResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'Content-Type' header must be specified."
}));
}
// May have media/type; charset=utf-8, allow partial match.
if (!Request.ContentType.StartsWith("application/x-www-form-urlencoded", StringComparison.OrdinalIgnoreCase))
{
Logger.LogError("The revocation request was rejected because an invalid 'Content-Type' " +
"header was specified: {ContentType}.", Request.ContentType);
return(await SendRevocationResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The specified 'Content-Type' header is not valid."
}));
}
var request = new OpenIdConnectRequest(await Request.ReadFormAsync(Context.RequestAborted));
// Note: set the message type before invoking the ExtractRevocationRequest event.
request.SetProperty(OpenIdConnectConstants.Properties.MessageType,
OpenIdConnectConstants.MessageTypes.RevocationRequest);
// Insert the revocation request in the ASP.NET context.
Context.SetOpenIdConnectRequest(request);
var @event = new ExtractRevocationRequestContext(Context, Options, request);
await Options.Provider.ExtractRevocationRequest(@event);
if (@event.HandledResponse)
{
Logger.LogDebug("The revocation request was handled in user code.");
return(true);
}
else if (@event.Skipped)
{
Logger.LogDebug("The default revocation request handling was skipped from user code.");
return(false);
}
else if (@event.IsRejected)
{
Logger.LogError("The revocation request was rejected with the following error: {Error} ; {Description}",
/* Error: */ @event.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
/* Description: */ @event.ErrorDescription);
return(await SendRevocationResponseAsync(new OpenIdConnectResponse
{
Error = @event.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = @event.ErrorDescription,
ErrorUri = @event.ErrorUri
}));
}
Logger.LogInformation("The revocation request was successfully extracted " +
"from the HTTP request: {Request}.", request);
if (string.IsNullOrEmpty(request.Token))
{
return(await SendRevocationResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'token' parameter is missing."
}));
}
// Try to resolve the client credentials specified in the 'Authorization' header.
// If they cannot be extracted, fallback to the client_id/client_secret parameters.
var credentials = Request.Headers.GetClientCredentials();
if (credentials != null)
{
// Reject requests that use multiple client authentication methods.
// See https://tools.ietf.org/html/rfc6749#section-2.3 for more information.
if (!string.IsNullOrEmpty(request.ClientSecret))
{
Logger.LogError("The revocation request was rejected because " +
"multiple client credentials were specified.");
return(await SendRevocationResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "Multiple client credentials cannot be specified."
}));
}
request.ClientId = credentials?.Key;
request.ClientSecret = credentials?.Value;
}
var context = new ValidateRevocationRequestContext(Context, Options, request);
await Options.Provider.ValidateRevocationRequest(context);
// If the validation context was set as fully validated,
// mark the OpenID Connect request as confidential.
if (context.IsValidated)
{
request.SetProperty(OpenIdConnectConstants.Properties.ConfidentialityLevel,
OpenIdConnectConstants.ConfidentialityLevels.Private);
}
if (context.HandledResponse)
{
Logger.LogDebug("The revocation request was handled in user code.");
return(true);
}
else if (context.Skipped)
{
Logger.LogDebug("The default revocation request handling was skipped from user code.");
return(false);
}
else if (context.IsRejected)
{
Logger.LogError("The revocation request was rejected with the following error: {Error} ; {Description}",
/* Error: */ context.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
/* Description: */ context.ErrorDescription);
return(await SendRevocationResponseAsync(new OpenIdConnectResponse
{
Error = context.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = context.ErrorDescription,
ErrorUri = context.ErrorUri
}));
}
// Store the validated client_id as a request property.
request.SetProperty(OpenIdConnectConstants.Properties.ValidatedClientId, context.ClientId);
Logger.LogInformation("The revocation request was successfully validated.");
AuthenticationTicket ticket = null;
// Note: use the "token_type_hint" parameter to determine
// the type of the token sent by the client application.
// See https://tools.ietf.org/html/rfc7009#section-2.1
switch (request.TokenTypeHint)
{
case OpenIdConnectConstants.TokenTypeHints.AccessToken:
ticket = await DeserializeAccessTokenAsync(request.Token, request);
break;
case OpenIdConnectConstants.TokenTypeHints.AuthorizationCode:
ticket = await DeserializeAuthorizationCodeAsync(request.Token, request);
break;
case OpenIdConnectConstants.TokenTypeHints.IdToken:
ticket = await DeserializeIdentityTokenAsync(request.Token, request);
break;
case OpenIdConnectConstants.TokenTypeHints.RefreshToken:
ticket = await DeserializeRefreshTokenAsync(request.Token, request);
break;
}
// Note: if the token can't be found using "token_type_hint",
// the search must be extended to all supported token types.
// See https://tools.ietf.org/html/rfc7009#section-2.1
if (ticket == null)
{
ticket = await DeserializeAccessTokenAsync(request.Token, request) ??
await DeserializeAuthorizationCodeAsync(request.Token, request) ??
await DeserializeIdentityTokenAsync(request.Token, request) ??
await DeserializeRefreshTokenAsync(request.Token, request);
}
if (ticket == null)
{
Logger.LogInformation("The revocation request was ignored because the token was invalid.");
return(await SendRevocationResponseAsync(new OpenIdConnectResponse()));
}
// If the ticket is already expired, directly return a 200 response.
else if (ticket.Properties.ExpiresUtc.HasValue &&
ticket.Properties.ExpiresUtc < Options.SystemClock.UtcNow)
{
Logger.LogInformation("The revocation request was ignored because the token was already expired.");
return(await SendRevocationResponseAsync(new OpenIdConnectResponse()));
}
// Note: unlike refresh tokens that can only be revoked by client applications,
// access tokens can be revoked by either resource servers or client applications:
// in both cases, the caller must be authenticated if the ticket is marked as confidential.
if (context.IsSkipped && ticket.IsConfidential())
{
Logger.LogError("The revocation request was rejected because the caller was not authenticated.");
return(await SendRevocationResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest
}));
}
// When a client_id can be inferred from the introspection request,
// ensure that the client application is a valid audience/presenter.
if (!string.IsNullOrEmpty(context.ClientId))
{
if (ticket.IsAuthorizationCode() && ticket.HasPresenter() && !ticket.HasPresenter(context.ClientId))
{
Logger.LogError("The revocation request was rejected because the " +
"authorization code was issued to a different client.");
return(await SendRevocationResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest
}));
}
// Ensure the caller is listed as a valid audience or authorized presenter.
else if (ticket.IsAccessToken() && ticket.HasAudience() && !ticket.HasAudience(context.ClientId) &&
ticket.HasPresenter() && !ticket.HasPresenter(context.ClientId))
{
Logger.LogError("The revocation request was rejected because the access token " +
"was issued to a different client or for another resource server.");
return(await SendRevocationResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest
}));
}
// Reject the request if the caller is not listed as a valid audience.
else if (ticket.IsIdentityToken() && ticket.HasAudience() && !ticket.HasAudience(context.ClientId))
{
Logger.LogError("The revocation request was rejected because the " +
"identity token was issued to a different client.");
return(await SendRevocationResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest
}));
}
// Reject the introspection request if the caller doesn't
// correspond to the client application the token was issued to.
else if (ticket.IsRefreshToken() && ticket.HasPresenter() && !ticket.HasPresenter(context.ClientId))
{
Logger.LogError("The revocation request was rejected because the " +
"refresh token was issued to a different client.");
return(await SendRevocationResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest
}));
}
}
var notification = new HandleRevocationRequestContext(Context, Options, request, ticket);
await Options.Provider.HandleRevocationRequest(notification);
if (notification.HandledResponse)
{
Logger.LogDebug("The revocation request was handled in user code.");
return(true);
}
else if (notification.Skipped)
{
Logger.LogDebug("The default revocation request handling was skipped from user code.");
return(false);
}
else if (notification.IsRejected)
{
Logger.LogError("The revocation request was rejected with the following error: {Error} ; {Description}",
/* Error: */ notification.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
/* Description: */ notification.ErrorDescription);
return(await SendRevocationResponseAsync(new OpenIdConnectResponse
{
Error = notification.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = notification.ErrorDescription,
ErrorUri = notification.ErrorUri
}));
}
if (!notification.Revoked)
{
return(await SendRevocationResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.UnsupportedTokenType,
ErrorDescription = "The specified token cannot be revoked."
}));
}
return(await SendRevocationResponseAsync(new OpenIdConnectResponse()));
}
private async Task <bool> InvokeTokenEndpointAsync()
{
if (!string.Equals(Request.Method, "POST", StringComparison.OrdinalIgnoreCase))
{
Options.Logger.LogError("The token request was rejected because an invalid " +
"HTTP method was received: {Method}.", Request.Method);
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "A malformed token request has been received: make sure to use POST."
}));
}
// See http://openid.net/specs/openid-connect-core-1_0.html#FormSerialization
if (string.IsNullOrEmpty(Request.ContentType))
{
Options.Logger.LogError("The token request was rejected because the " +
"mandatory 'Content-Type' header was missing.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "A malformed token request has been received: " +
"the mandatory 'Content-Type' header was missing from the POST request."
}));
}
// May have media/type; charset=utf-8, allow partial match.
if (!Request.ContentType.StartsWith("application/x-www-form-urlencoded", StringComparison.OrdinalIgnoreCase))
{
Options.Logger.LogError("The token request was rejected because an invalid 'Content-Type' " +
"header was received: {ContentType}.", Request.ContentType);
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "A malformed token request has been received: " +
"the 'Content-Type' header contained an unexcepted value. " +
"Make sure to use 'application/x-www-form-urlencoded'."
}));
}
var request = new OpenIdConnectRequest(await Request.ReadFormAsync());
// Note: set the message type before invoking the ExtractTokenRequest event.
request.SetProperty(OpenIdConnectConstants.Properties.MessageType,
OpenIdConnectConstants.MessageTypes.Token);
// Store the token request in the OWIN context.
Context.SetOpenIdConnectRequest(request);
var @event = new ExtractTokenRequestContext(Context, Options, request);
await Options.Provider.ExtractTokenRequest(@event);
if (@event.HandledResponse)
{
return(true);
}
else if (@event.Skipped)
{
return(false);
}
else if (@event.IsRejected)
{
Options.Logger.LogError("The token request was rejected with the following error: {Error} ; {Description}",
/* Error: */ @event.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
/* Description: */ @event.ErrorDescription);
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = @event.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = @event.ErrorDescription,
ErrorUri = @event.ErrorUri
}));
}
// Reject token requests missing the mandatory grant_type parameter.
if (string.IsNullOrEmpty(request.GrantType))
{
Options.Logger.LogError("The token request was rejected because the grant type was missing.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'grant_type' parameter was missing.",
}));
}
// Reject grant_type=authorization_code requests if the authorization endpoint is disabled.
else if (request.IsAuthorizationCodeGrantType() && !Options.AuthorizationEndpointPath.HasValue)
{
Options.Logger.LogError("The token request was rejected because the authorization code grant was disabled.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.UnsupportedGrantType,
ErrorDescription = "The authorization code grant is not allowed by this authorization server."
}));
}
// Reject grant_type=authorization_code requests missing the authorization code.
// See https://tools.ietf.org/html/rfc6749#section-4.1.3
else if (request.IsAuthorizationCodeGrantType() && string.IsNullOrEmpty(request.Code))
{
Options.Logger.LogError("The token request was rejected because the authorization code was missing.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'code' parameter was missing."
}));
}
// Reject grant_type=refresh_token requests missing the refresh token.
// See https://tools.ietf.org/html/rfc6749#section-6
else if (request.IsRefreshTokenGrantType() && string.IsNullOrEmpty(request.RefreshToken))
{
Options.Logger.LogError("The token request was rejected because the refresh token was missing.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'refresh_token' parameter was missing."
}));
}
// Reject grant_type=password requests missing username or password.
// See https://tools.ietf.org/html/rfc6749#section-4.3.2
else if (request.IsPasswordGrantType() && (string.IsNullOrEmpty(request.Username) ||
string.IsNullOrEmpty(request.Password)))
{
Options.Logger.LogError("The token request was rejected because the resource owner credentials were missing.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'username' and/or 'password' parameters " +
"was/were missing from the request message."
}));
}
// When client_id and client_secret are both null, try to extract them from the Authorization header.
// See http://tools.ietf.org/html/rfc6749#section-2.3.1 and
// http://openid.net/specs/openid-connect-core-1_0.html#ClientAuthentication
if (string.IsNullOrEmpty(request.ClientId) && string.IsNullOrEmpty(request.ClientSecret))
{
var header = Request.Headers.Get("Authorization");
if (!string.IsNullOrEmpty(header) && header.StartsWith("Basic ", StringComparison.OrdinalIgnoreCase))
{
try {
var value = header.Substring("Basic ".Length).Trim();
var data = Encoding.UTF8.GetString(Convert.FromBase64String(value));
var index = data.IndexOf(':');
if (index >= 0)
{
request.ClientId = data.Substring(0, index);
request.ClientSecret = data.Substring(index + 1);
}
}
catch (FormatException) { }
catch (ArgumentException) { }
}
}
var context = new ValidateTokenRequestContext(Context, Options, request);
await Options.Provider.ValidateTokenRequest(context);
// If the validation context was set as fully validated,
// mark the OpenID Connect request as confidential.
if (context.IsValidated)
{
request.SetProperty(OpenIdConnectConstants.Properties.ConfidentialityLevel,
OpenIdConnectConstants.ConfidentialityLevels.Private);
}
if (context.HandledResponse)
{
return(true);
}
else if (context.Skipped)
{
return(false);
}
else if (context.IsRejected)
{
Options.Logger.LogError("The token request was rejected with the following error: {Error} ; {Description}",
/* Error: */ context.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
/* Description: */ context.ErrorDescription);
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = context.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = context.ErrorDescription,
ErrorUri = context.ErrorUri
}));
}
// Reject grant_type=client_credentials requests if validation was skipped.
else if (context.IsSkipped && request.IsClientCredentialsGrantType())
{
Options.Logger.LogError("The token request must be fully validated to use the client_credentials grant type.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Client authentication is required when using client_credentials."
}));
}
// Ensure that the client_id has been set from the ValidateTokenRequest event.
else if (context.IsValidated && string.IsNullOrEmpty(request.ClientId))
{
Options.Logger.LogError("The token request was validated but the client_id was not set.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.ServerError,
ErrorDescription = "An internal server error occurred."
}));
}
// At this stage, client_id cannot be null for grant_type=authorization_code requests,
// as it must either be set in the ValidateTokenRequest notification
// by the developer or manually flowed by non-confidential client applications.
// See https://tools.ietf.org/html/rfc6749#section-4.1.3
if (request.IsAuthorizationCodeGrantType() && string.IsNullOrEmpty(request.ClientId))
{
Options.Logger.LogError("The token request was rejected because the mandatory 'client_id' was missing.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "client_id was missing from the token request"
}));
}
AuthenticationTicket ticket = null;
// See http://tools.ietf.org/html/rfc6749#section-4.1
// and http://tools.ietf.org/html/rfc6749#section-4.1.3 (authorization code grant).
// See http://tools.ietf.org/html/rfc6749#section-6 (refresh token grant).
if (request.IsAuthorizationCodeGrantType() || request.IsRefreshTokenGrantType())
{
ticket = request.IsAuthorizationCodeGrantType() ?
await DeserializeAuthorizationCodeAsync(request.Code, request) :
await DeserializeRefreshTokenAsync(request.RefreshToken, request);
if (ticket == null)
{
Options.Logger.LogError("The token request was rejected because the " +
"authorization code or the refresh token was invalid.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Invalid ticket"
}));
}
// If the client was fully authenticated when retrieving its refresh token,
// the current request must be rejected if client authentication was not enforced.
if (request.IsRefreshTokenGrantType() && !context.IsValidated && ticket.IsConfidential())
{
Options.Logger.LogError("The token request was rejected because client authentication " +
"was required to use the confidential refresh token.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Client authentication is required to use this ticket"
}));
}
if (ticket.Properties.ExpiresUtc.HasValue &&
ticket.Properties.ExpiresUtc < Options.SystemClock.UtcNow)
{
Options.Logger.LogError("The token request was rejected because the " +
"authorization code or the refresh token was expired.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Expired ticket"
}));
}
// Note: presenters may be empty during a grant_type=refresh_token request if the refresh token
// was issued to a public client but cannot be null for an authorization code grant request.
var presenters = ticket.GetPresenters();
if (request.IsAuthorizationCodeGrantType() && !presenters.Any())
{
Options.Logger.LogError("The token request was rejected because the authorization " +
"code didn't contain any valid presenter.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.ServerError,
ErrorDescription = "An internal server error occurred."
}));
}
// Ensure the authorization code/refresh token was issued to the client application making the token request.
// Note: when using the refresh token grant, client_id is optional but must validated if present.
// As a consequence, this check doesn't depend on the actual status of client authentication.
// See https://tools.ietf.org/html/rfc6749#section-6
// and http://openid.net/specs/openid-connect-core-1_0.html#RefreshingAccessToken
if (!string.IsNullOrEmpty(request.ClientId) && presenters.Any() &&
!presenters.Contains(request.ClientId, StringComparer.Ordinal))
{
Options.Logger.LogError("The token request was rejected because the authorization " +
"code was issued to a different client application.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Ticket does not contain matching client_id"
}));
}
// Validate the redirect_uri flowed by the client application during this token request.
// Note: for pure OAuth2 requests, redirect_uri is only mandatory if the authorization request
// contained an explicit redirect_uri. OpenID Connect requests MUST include a redirect_uri
// but the specifications allow proceeding the token request without returning an error
// if the authorization request didn't contain an explicit redirect_uri.
// See https://tools.ietf.org/html/rfc6749#section-4.1.3
// and http://openid.net/specs/openid-connect-core-1_0.html#TokenRequestValidation
var address = ticket.GetProperty(OpenIdConnectConstants.Properties.RedirectUri);
if (request.IsAuthorizationCodeGrantType() && !string.IsNullOrEmpty(address))
{
ticket.SetProperty(OpenIdConnectConstants.Properties.RedirectUri, null);
if (string.IsNullOrEmpty(request.RedirectUri))
{
Options.Logger.LogError("The token request was rejected because the mandatory 'redirect_uri' " +
"parameter was missing from the grant_type=authorization_code request.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "redirect_uri was missing from the token request"
}));
}
else if (!string.Equals(address, request.RedirectUri, StringComparison.Ordinal))
{
Options.Logger.LogError("The token request was rejected because the 'redirect_uri' " +
"parameter didn't correspond to the expected value.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Authorization code does not contain matching redirect_uri"
}));
}
}
// If a code challenge was initially sent in the authorization request and associated with the
// code, validate the code verifier to ensure the token request is sent by a legit caller.
var challenge = ticket.GetProperty(OpenIdConnectConstants.Properties.CodeChallenge);
if (request.IsAuthorizationCodeGrantType() && !string.IsNullOrEmpty(challenge))
{
ticket.SetProperty(OpenIdConnectConstants.Properties.CodeChallenge, null);
// Get the code verifier from the token request.
// If it cannot be found, return an invalid_grant error.
var verifier = request.CodeVerifier;
if (string.IsNullOrEmpty(verifier))
{
Options.Logger.LogError("The token request was rejected because the required 'code_verifier' " +
"parameter was missing from the grant_type=authorization_code request.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The required 'code_verifier' was missing from the token request."
}));
}
// Note: the code challenge method is always validated when receiving the authorization request.
var method = ticket.GetProperty(OpenIdConnectConstants.Properties.CodeChallengeMethod);
ticket.SetProperty(OpenIdConnectConstants.Properties.CodeChallengeMethod, null);
Debug.Assert(string.IsNullOrEmpty(method) ||
string.Equals(method, OpenIdConnectConstants.CodeChallengeMethods.Plain, StringComparison.Ordinal) ||
string.Equals(method, OpenIdConnectConstants.CodeChallengeMethods.Sha256, StringComparison.Ordinal),
"The specified code challenge method should be supported.");
// If the S256 challenge method was used, compute the hash corresponding to the code verifier.
if (string.Equals(method, OpenIdConnectConstants.CodeChallengeMethods.Sha256, StringComparison.Ordinal))
{
using (var algorithm = SHA256.Create()) {
// Compute the SHA-256 hash of the code verifier and encode it using base64-url.
// See https://tools.ietf.org/html/rfc7636#section-4.6 for more information.
var hash = algorithm.ComputeHash(Encoding.ASCII.GetBytes(request.CodeVerifier));
verifier = Base64UrlEncoder.Encode(hash);
}
}
// Compare the verifier and the code challenge: if the two don't match, return an error.
// Note: to prevent timing attacks, a time-constant comparer is always used.
if (!OpenIdConnectServerHelpers.AreEqual(verifier, challenge))
{
Options.Logger.LogError("The token request was rejected because the 'code_verifier' was invalid.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "The specified 'code_verifier' was invalid."
}));
}
}
if (request.IsRefreshTokenGrantType() && !string.IsNullOrEmpty(request.Resource))
{
// When an explicit resource parameter has been included in the token request
// but was missing from the initial request, the request MUST be rejected.
var resources = ticket.GetResources();
if (!resources.Any())
{
Options.Logger.LogError("The token request was rejected because the 'resource' parameter was not allowed.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Token request cannot contain a resource parameter " +
"if the authorization request didn't contain one"
}));
}
// When an explicit resource parameter has been included in the token request,
// the authorization server MUST ensure that it doesn't contain resources
// that were not allowed during the initial authorization/token request.
else if (!new HashSet <string>(resources).IsSupersetOf(request.GetResources()))
{
Options.Logger.LogError("The token request was rejected because the 'resource' parameter was not valid.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Token request doesn't contain a valid resource parameter"
}));
}
}
if (request.IsRefreshTokenGrantType() && !string.IsNullOrEmpty(request.Scope))
{
// When an explicit scope parameter has been included in the token request
// but was missing from the initial request, the request MUST be rejected.
// See http://tools.ietf.org/html/rfc6749#section-6
var scopes = ticket.GetScopes();
if (!scopes.Any())
{
Options.Logger.LogError("The token request was rejected because the 'scope' parameter was not allowed.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Token request cannot contain a scope parameter " +
"if the authorization request didn't contain one"
}));
}
// When an explicit scope parameter has been included in the token request,
// the authorization server MUST ensure that it doesn't contain scopes
// that were not allowed during the initial authorization/token request.
// See https://tools.ietf.org/html/rfc6749#section-6
else if (!new HashSet <string>(scopes).IsSupersetOf(request.GetScopes()))
{
Options.Logger.LogError("The token request was rejected because the 'scope' parameter was not valid.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Token request doesn't contain a valid scope parameter"
}));
}
}
}
var notification = new HandleTokenRequestContext(Context, Options, request, ticket);
await Options.Provider.HandleTokenRequest(notification);
if (notification.HandledResponse)
{
return(true);
}
else if (notification.Skipped)
{
return(false);
}
else if (notification.IsRejected)
{
Options.Logger.LogError("The token request was rejected with the following error: {Error} ; {Description}",
/* Error: */ notification.Error ?? OpenIdConnectConstants.Errors.InvalidGrant,
/* Description: */ notification.ErrorDescription);
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = notification.Error ?? OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = notification.ErrorDescription,
ErrorUri = notification.ErrorUri
}));
}
// Flow the changes made to the ticket.
ticket = notification.Ticket;
// Ensure an authentication ticket has been provided or return
// an error code indicating that the grant type is not supported.
if (ticket == null)
{
Options.Logger.LogError("The token request was rejected because no authentication " +
"ticket was returned by application code.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.UnsupportedGrantType,
ErrorDescription = "The specified grant_type parameter is not supported."
}));
}
return(await HandleSignInAsync(ticket));
}
private async Task <bool> InvokeIntrospectionEndpointAsync()
{
OpenIdConnectRequest request;
// See https://tools.ietf.org/html/rfc7662#section-2.1
// and https://tools.ietf.org/html/rfc7662#section-4
if (string.Equals(Request.Method, "GET", StringComparison.OrdinalIgnoreCase))
{
request = new OpenIdConnectRequest(Request.Query);
}
else if (string.Equals(Request.Method, "POST", StringComparison.OrdinalIgnoreCase))
{
// See http://openid.net/specs/openid-connect-core-1_0.html#FormSerialization
if (string.IsNullOrEmpty(Request.ContentType))
{
Logger.LogError("The introspection request was rejected because " +
"the mandatory 'Content-Type' header was missing.");
return(await SendIntrospectionResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'Content-Type' header must be specified."
}));
}
// May have media/type; charset=utf-8, allow partial match.
if (!Request.ContentType.StartsWith("application/x-www-form-urlencoded", StringComparison.OrdinalIgnoreCase))
{
Logger.LogError("The introspection request was rejected because an invalid 'Content-Type' " +
"header was specified: {ContentType}.", Request.ContentType);
return(await SendIntrospectionResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The specified 'Content-Type' header is not valid."
}));
}
request = new OpenIdConnectRequest(await Request.ReadFormAsync(Context.RequestAborted));
}
else
{
Logger.LogError("The introspection request was rejected because an invalid " +
"HTTP method was specified: {Method}.", Request.Method);
return(await SendIntrospectionResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The specified HTTP method is not valid."
}));
}
// Note: set the message type before invoking the ExtractIntrospectionRequest event.
request.SetProperty(OpenIdConnectConstants.Properties.MessageType,
OpenIdConnectConstants.MessageTypes.IntrospectionRequest);
// Store the introspection request in the ASP.NET context.
Context.SetOpenIdConnectRequest(request);
var @event = new ExtractIntrospectionRequestContext(Context, Options, request);
await Options.Provider.ExtractIntrospectionRequest(@event);
if (@event.HandledResponse)
{
Logger.LogDebug("The introspection request was handled in user code.");
return(true);
}
else if (@event.Skipped)
{
Logger.LogDebug("The default introspection request handling was skipped from user code.");
return(false);
}
else if (@event.IsRejected)
{
Logger.LogError("The introspection request was rejected with the following error: {Error} ; {Description}",
/* Error: */ @event.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
/* Description: */ @event.ErrorDescription);
return(await SendIntrospectionResponseAsync(new OpenIdConnectResponse
{
Error = @event.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = @event.ErrorDescription,
ErrorUri = @event.ErrorUri
}));
}
Logger.LogInformation("The introspection request was successfully extracted " +
"from the HTTP request: {Request}.", request);
if (string.IsNullOrEmpty(request.Token))
{
return(await SendIntrospectionResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'token' parameter is missing."
}));
}
// Try to resolve the client credentials specified in the 'Authorization' header.
// If they cannot be extracted, fallback to the client_id/client_secret parameters.
var credentials = Request.Headers.GetClientCredentials();
if (credentials != null)
{
// Reject requests that use multiple client authentication methods.
// See https://tools.ietf.org/html/rfc6749#section-2.3 for more information.
if (!string.IsNullOrEmpty(request.ClientSecret))
{
Logger.LogError("The introspection request was rejected because " +
"multiple client credentials were specified.");
return(await SendIntrospectionResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "Multiple client credentials cannot be specified."
}));
}
request.ClientId = credentials?.Key;
request.ClientSecret = credentials?.Value;
}
var context = new ValidateIntrospectionRequestContext(Context, Options, request);
await Options.Provider.ValidateIntrospectionRequest(context);
// If the validation context was set as fully validated,
// mark the OpenID Connect request as confidential.
if (context.IsValidated)
{
request.SetProperty(OpenIdConnectConstants.Properties.ConfidentialityLevel,
OpenIdConnectConstants.ConfidentialityLevels.Private);
}
if (context.HandledResponse)
{
Logger.LogDebug("The introspection request was handled in user code.");
return(true);
}
else if (context.Skipped)
{
Logger.LogDebug("The default introspection request handling was skipped from user code.");
return(false);
}
else if (context.IsRejected)
{
Logger.LogError("The introspection request was rejected with the following error: {Error} ; {Description}",
/* Error: */ context.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
/* Description: */ context.ErrorDescription);
return(await SendIntrospectionResponseAsync(new OpenIdConnectResponse
{
Error = context.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = context.ErrorDescription,
ErrorUri = context.ErrorUri
}));
}
// Store the validated client_id as a request property.
request.SetProperty(OpenIdConnectConstants.Properties.ValidatedClientId, context.ClientId);
Logger.LogInformation("The introspection request was successfully validated.");
AuthenticationTicket ticket = null;
// Note: use the "token_type_hint" parameter to determine
// the type of the token sent by the client application.
// See https://tools.ietf.org/html/rfc7662#section-2.1
switch (request.TokenTypeHint)
{
case OpenIdConnectConstants.TokenTypeHints.AccessToken:
ticket = await DeserializeAccessTokenAsync(request.Token, request);
break;
case OpenIdConnectConstants.TokenTypeHints.AuthorizationCode:
ticket = await DeserializeAuthorizationCodeAsync(request.Token, request);
break;
case OpenIdConnectConstants.TokenTypeHints.IdToken:
ticket = await DeserializeIdentityTokenAsync(request.Token, request);
break;
case OpenIdConnectConstants.TokenTypeHints.RefreshToken:
ticket = await DeserializeRefreshTokenAsync(request.Token, request);
break;
}
// Note: if the token can't be found using "token_type_hint",
// the search must be extended to all supported token types.
// See https://tools.ietf.org/html/rfc7662#section-2.1
if (ticket == null)
{
ticket = await DeserializeAccessTokenAsync(request.Token, request) ??
await DeserializeAuthorizationCodeAsync(request.Token, request) ??
await DeserializeIdentityTokenAsync(request.Token, request) ??
await DeserializeRefreshTokenAsync(request.Token, request);
}
if (ticket == null)
{
Logger.LogInformation("The introspection request was rejected because the token was invalid.");
return(await SendIntrospectionResponseAsync(new OpenIdConnectResponse
{
[OpenIdConnectConstants.Parameters.Active] = false
}));
}
// Note: unlike refresh or identity tokens that can only be validated by client applications,
// access tokens can be validated by either resource servers or client applications:
// in both cases, the caller must be authenticated if the ticket is marked as confidential.
if (context.IsSkipped && ticket.IsConfidential())
{
Logger.LogError("The introspection request was rejected because the caller was not authenticated.");
return(await SendIntrospectionResponseAsync(new OpenIdConnectResponse
{
[OpenIdConnectConstants.Parameters.Active] = false
}));
}
// If the ticket is already expired, directly return active=false.
if (ticket.Properties.ExpiresUtc.HasValue &&
ticket.Properties.ExpiresUtc < Options.SystemClock.UtcNow)
{
Logger.LogInformation("The introspection request was rejected because the token was expired.");
return(await SendIntrospectionResponseAsync(new OpenIdConnectResponse
{
[OpenIdConnectConstants.Parameters.Active] = false
}));
}
// When a client_id can be inferred from the introspection request,
// ensure that the client application is a valid audience/presenter.
if (!string.IsNullOrEmpty(context.ClientId))
{
if (ticket.IsAuthorizationCode() && ticket.HasPresenter() && !ticket.HasPresenter(context.ClientId))
{
Logger.LogError("The introspection request was rejected because the " +
"authorization code was issued to a different client.");
return(await SendIntrospectionResponseAsync(new OpenIdConnectResponse
{
[OpenIdConnectConstants.Parameters.Active] = false
}));
}
// Ensure the caller is listed as a valid audience or authorized presenter.
else if (ticket.IsAccessToken() && ticket.HasAudience() && !ticket.HasAudience(context.ClientId) &&
ticket.HasPresenter() && !ticket.HasPresenter(context.ClientId))
{
Logger.LogError("The introspection request was rejected because the access token " +
"was issued to a different client or for another resource server.");
return(await SendIntrospectionResponseAsync(new OpenIdConnectResponse
{
[OpenIdConnectConstants.Parameters.Active] = false
}));
}
// Reject the request if the caller is not listed as a valid audience.
else if (ticket.IsIdentityToken() && ticket.HasAudience() && !ticket.HasAudience(context.ClientId))
{
Logger.LogError("The introspection request was rejected because the " +
"identity token was issued to a different client.");
return(await SendIntrospectionResponseAsync(new OpenIdConnectResponse
{
[OpenIdConnectConstants.Parameters.Active] = false
}));
}
// Reject the introspection request if the caller doesn't
// correspond to the client application the token was issued to.
else if (ticket.IsRefreshToken() && ticket.HasPresenter() && !ticket.HasPresenter(context.ClientId))
{
Logger.LogError("The introspection request was rejected because the " +
"refresh token was issued to a different client.");
return(await SendIntrospectionResponseAsync(new OpenIdConnectResponse
{
[OpenIdConnectConstants.Parameters.Active] = false
}));
}
}
var notification = new HandleIntrospectionRequestContext(Context, Options, request, ticket)
{
Active = true,
Issuer = Context.GetIssuer(Options),
TokenId = ticket.GetTokenId(),
TokenUsage = ticket.GetProperty(OpenIdConnectConstants.Properties.TokenUsage),
Subject = ticket.Principal.GetClaim(OpenIdConnectConstants.Claims.Subject)
};
// Note: only set "token_type" when the received token is an access token.
// See https://tools.ietf.org/html/rfc7662#section-2.2
// and https://tools.ietf.org/html/rfc6749#section-5.1
if (ticket.IsAccessToken())
{
notification.TokenType = OpenIdConnectConstants.TokenTypes.Bearer;
}
notification.IssuedAt = ticket.Properties.IssuedUtc;
notification.NotBefore = ticket.Properties.IssuedUtc;
notification.ExpiresAt = ticket.Properties.ExpiresUtc;
// Infer the audiences/client_id claims from the properties stored in the authentication ticket.
// Note: the client_id claim must be a unique string so multiple presenters cannot be returned.
// To work around this limitation, only the first one is returned if multiple values are listed.
notification.Audiences.UnionWith(ticket.GetAudiences());
notification.ClientId = ticket.GetPresenters().FirstOrDefault();
// Note: non-metadata claims are only added if the caller's client_id is known
// AND is in the specified audiences, unless there's no explicit audience.
if (!ticket.HasAudience() || (!string.IsNullOrEmpty(context.ClientId) && ticket.HasAudience(context.ClientId)))
{
notification.Username = ticket.Principal.Identity?.Name;
notification.Scopes.UnionWith(ticket.GetScopes());
// Potentially sensitive claims are only exposed if the client was authenticated
// and if the authentication ticket corresponds to an identity or access token.
if (context.IsValidated && (ticket.IsAccessToken() || ticket.IsIdentityToken()))
{
foreach (var grouping in ticket.Principal.Claims.GroupBy(claim => claim.Type))
{
// Exclude standard claims, that are already handled via strongly-typed properties.
// Make sure to always update this list when adding new built-in claim properties.
var type = grouping.Key;
switch (type)
{
case OpenIdConnectConstants.Claims.Audience:
case OpenIdConnectConstants.Claims.ExpiresAt:
case OpenIdConnectConstants.Claims.IssuedAt:
case OpenIdConnectConstants.Claims.Issuer:
case OpenIdConnectConstants.Claims.NotBefore:
case OpenIdConnectConstants.Claims.Scope:
case OpenIdConnectConstants.Claims.Subject:
case OpenIdConnectConstants.Claims.TokenType:
case OpenIdConnectConstants.Claims.TokenUsage:
continue;
}
var claims = grouping.ToArray();
switch (claims.Length)
{
case 0: continue;
// When there's only one claim with the same type, directly
// convert the claim as an OpenIdConnectParameter instance,
// whose token type is determined from the claim value type.
case 1:
{
notification.Claims[type] = claims[0].AsParameter();
continue;
}
// When multiple claims share the same type, convert all the claims
// to OpenIdConnectParameter instances, retrieve the underlying
// JSON values and add everything to a new JSON array.
default:
{
notification.Claims[type] = new JArray(claims.Select(claim => claim.AsParameter().Value));
continue;
}
}
}
}
}
await Options.Provider.HandleIntrospectionRequest(notification);
if (notification.HandledResponse)
{
Logger.LogDebug("The introspection request was handled in user code.");
return(true);
}
else if (notification.Skipped)
{
Logger.LogDebug("The default introspection request handling was skipped from user code.");
return(false);
}
else if (notification.IsRejected)
{
Logger.LogError("The introspection request was rejected with the following error: {Error} ; {Description}",
/* Error: */ notification.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
/* Description: */ notification.ErrorDescription);
return(await SendIntrospectionResponseAsync(new OpenIdConnectResponse
{
Error = notification.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = notification.ErrorDescription,
ErrorUri = notification.ErrorUri
}));
}
var response = new OpenIdConnectResponse
{
[OpenIdConnectConstants.Claims.Active] = notification.Active
};
// Only add the other properties if
// the token is considered as active.
if (notification.Active)
{
response[OpenIdConnectConstants.Claims.Issuer] = notification.Issuer;
response[OpenIdConnectConstants.Claims.Username] = notification.Username;
response[OpenIdConnectConstants.Claims.Subject] = notification.Subject;
response[OpenIdConnectConstants.Claims.Scope] = string.Join(" ", notification.Scopes);
response[OpenIdConnectConstants.Claims.JwtId] = notification.TokenId;
response[OpenIdConnectConstants.Claims.TokenType] = notification.TokenType;
response[OpenIdConnectConstants.Claims.TokenUsage] = notification.TokenUsage;
response[OpenIdConnectConstants.Claims.ClientId] = notification.ClientId;
if (notification.IssuedAt != null)
{
response[OpenIdConnectConstants.Claims.IssuedAt] =
EpochTime.GetIntDate(notification.IssuedAt.Value.UtcDateTime);
}
if (notification.NotBefore != null)
{
response[OpenIdConnectConstants.Claims.NotBefore] =
EpochTime.GetIntDate(notification.NotBefore.Value.UtcDateTime);
}
if (notification.ExpiresAt != null)
{
response[OpenIdConnectConstants.Claims.ExpiresAt] =
EpochTime.GetIntDate(notification.ExpiresAt.Value.UtcDateTime);
}
switch (notification.Audiences.Count)
{
case 0: break;
case 1:
response[OpenIdConnectConstants.Claims.Audience] = notification.Audiences.ElementAt(0);
break;
default:
response[OpenIdConnectConstants.Claims.Audience] = new JArray(notification.Audiences);
break;
}
foreach (var claim in notification.Claims)
{
response.SetParameter(claim.Key, claim.Value);
}
}
return(await SendIntrospectionResponseAsync(response));
}
private async Task <bool> InvokeRevocationEndpointAsync()
{
if (!string.Equals(Request.Method, "POST", StringComparison.OrdinalIgnoreCase))
{
Logger.LogError("The revocation request was rejected because an invalid " +
"HTTP method was received: {Method}.", Request.Method);
return(await SendRevocationResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "A malformed revocation request has been received: " +
"make sure to use either GET or POST."
}));
}
// See http://openid.net/specs/openid-connect-core-1_0.html#FormSerialization
if (string.IsNullOrEmpty(Request.ContentType))
{
Logger.LogError("The revocation request was rejected because " +
"the mandatory 'Content-Type' header was missing.");
return(await SendRevocationResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "A malformed revocation request has been received: " +
"the mandatory 'Content-Type' header was missing from the POST request."
}));
}
// May have media/type; charset=utf-8, allow partial match.
if (!Request.ContentType.StartsWith("application/x-www-form-urlencoded", StringComparison.OrdinalIgnoreCase))
{
Logger.LogError("The revocation request was rejected because an invalid 'Content-Type' " +
"header was received: {ContentType}.", Request.ContentType);
return(await SendRevocationResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "A malformed revocation request has been received: " +
"the 'Content-Type' header contained an unexcepted value. " +
"Make sure to use 'application/x-www-form-urlencoded'."
}));
}
var request = new OpenIdConnectRequest(await Request.ReadFormAsync(Context.RequestAborted));
// Note: set the message type before invoking the ExtractRevocationRequest event.
request.SetProperty(OpenIdConnectConstants.Properties.MessageType,
OpenIdConnectConstants.MessageTypes.Revocation);
// Insert the revocation request in the ASP.NET context.
Context.SetOpenIdConnectRequest(request);
var @event = new ExtractRevocationRequestContext(Context, Options, request);
await Options.Provider.ExtractRevocationRequest(@event);
if (@event.HandledResponse)
{
return(true);
}
else if (@event.Skipped)
{
return(false);
}
else if (@event.IsRejected)
{
Logger.LogError("The revocation request was rejected with the following error: {Error} ; {Description}",
/* Error: */ @event.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
/* Description: */ @event.ErrorDescription);
return(await SendRevocationResponseAsync(new OpenIdConnectResponse {
Error = @event.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = @event.ErrorDescription,
ErrorUri = @event.ErrorUri
}));
}
if (string.IsNullOrWhiteSpace(request.Token))
{
return(await SendRevocationResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "A malformed revocation request has been received: " +
"a 'token' parameter with an access or refresh token is required."
}));
}
// When client_id and client_secret are both null, try to extract them from the Authorization header.
// See http://tools.ietf.org/html/rfc6749#section-2.3.1 and
// http://openid.net/specs/openid-connect-core-1_0.html#ClientAuthentication
if (string.IsNullOrEmpty(request.ClientId) && string.IsNullOrEmpty(request.ClientSecret))
{
string header = Request.Headers[HeaderNames.Authorization];
if (!string.IsNullOrEmpty(header) && header.StartsWith("Basic ", StringComparison.OrdinalIgnoreCase))
{
try {
var value = header.Substring("Basic ".Length).Trim();
var data = Encoding.UTF8.GetString(Convert.FromBase64String(value));
var index = data.IndexOf(':');
if (index >= 0)
{
request.ClientId = data.Substring(0, index);
request.ClientSecret = data.Substring(index + 1);
}
}
catch (FormatException) { }
catch (ArgumentException) { }
}
}
var context = new ValidateRevocationRequestContext(Context, Options, request);
await Options.Provider.ValidateRevocationRequest(context);
// If the validation context was set as fully validated,
// mark the OpenID Connect request as confidential.
if (context.IsValidated)
{
request.SetProperty(OpenIdConnectConstants.Properties.ConfidentialityLevel,
OpenIdConnectConstants.ConfidentialityLevels.Private);
}
if (context.HandledResponse)
{
return(true);
}
else if (context.Skipped)
{
return(false);
}
else if (context.IsRejected)
{
Logger.LogError("The revocation request was rejected with the following error: {Error} ; {Description}",
/* Error: */ context.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
/* Description: */ context.ErrorDescription);
return(await SendRevocationResponseAsync(new OpenIdConnectResponse {
Error = context.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = context.ErrorDescription,
ErrorUri = context.ErrorUri
}));
}
// Ensure that the client_id has been set from the ValidateRevocationRequest event.
else if (context.IsValidated && string.IsNullOrEmpty(request.ClientId))
{
Logger.LogError("The revocation request was validated but the client_id was not set.");
return(await SendRevocationResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.ServerError,
ErrorDescription = "An internal server error occurred."
}));
}
AuthenticationTicket ticket = null;
// Note: use the "token_type_hint" parameter to determine
// the type of the token sent by the client application.
// See https://tools.ietf.org/html/rfc7009#section-2.1
switch (request.TokenTypeHint)
{
case OpenIdConnectConstants.TokenTypeHints.AccessToken:
ticket = await DeserializeAccessTokenAsync(request.Token, request);
break;
case OpenIdConnectConstants.TokenTypeHints.AuthorizationCode:
ticket = await DeserializeAuthorizationCodeAsync(request.Token, request);
break;
case OpenIdConnectConstants.TokenTypeHints.IdToken:
ticket = await DeserializeIdentityTokenAsync(request.Token, request);
break;
case OpenIdConnectConstants.TokenTypeHints.RefreshToken:
ticket = await DeserializeRefreshTokenAsync(request.Token, request);
break;
}
// Note: if the token can't be found using "token_type_hint",
// the search must be extended to all supported token types.
// See https://tools.ietf.org/html/rfc7009#section-2.1
if (ticket == null)
{
ticket = await DeserializeAccessTokenAsync(request.Token, request) ??
await DeserializeAuthorizationCodeAsync(request.Token, request) ??
await DeserializeIdentityTokenAsync(request.Token, request) ??
await DeserializeRefreshTokenAsync(request.Token, request);
}
if (ticket == null)
{
Logger.LogInformation("The revocation request was ignored because the token was invalid.");
return(await SendRevocationResponseAsync(new OpenIdConnectResponse()));
}
// If the ticket is already expired, directly return a 200 response.
else if (ticket.Properties.ExpiresUtc.HasValue &&
ticket.Properties.ExpiresUtc < Options.SystemClock.UtcNow)
{
Logger.LogInformation("The revocation request was ignored because the token was already expired.");
return(await SendRevocationResponseAsync(new OpenIdConnectResponse()));
}
// Note: unlike refresh tokens that can only be revoked by client applications,
// access tokens can be revoked by either resource servers or client applications:
// in both cases, the caller must be authenticated if the ticket is marked as confidential.
if (context.IsSkipped && ticket.IsConfidential())
{
Logger.LogError("The revocation request was rejected because the caller was not authenticated.");
return(await SendRevocationResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidRequest
}));
}
// When a client_id can be inferred from the introspection request,
// ensure that the client application is a valid audience/presenter.
if (!string.IsNullOrEmpty(request.ClientId))
{
if (ticket.IsAuthorizationCode() && ticket.HasPresenter() && !ticket.HasPresenter(request.ClientId))
{
Logger.LogError("The revocation request was rejected because the " +
"authorization code was issued to a different client.");
return(await SendRevocationResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidRequest
}));
}
// Ensure the caller is listed as a valid audience or authorized presenter.
else if (ticket.IsAccessToken() && ticket.HasAudience() && !ticket.HasAudience(request.ClientId) &&
ticket.HasPresenter() && !ticket.HasPresenter(request.ClientId))
{
Logger.LogError("The revocation request was rejected because the access token " +
"was issued to a different client or for another resource server.");
return(await SendRevocationResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidRequest
}));
}
// Reject the request if the caller is not listed as a valid audience.
else if (ticket.IsIdentityToken() && ticket.HasAudience() && !ticket.HasAudience(request.ClientId))
{
Logger.LogError("The revocation request was rejected because the " +
"identity token was issued to a different client.");
return(await SendRevocationResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidRequest
}));
}
// Reject the introspection request if the caller doesn't
// correspond to the client application the token was issued to.
else if (ticket.IsRefreshToken() && ticket.HasPresenter() && !ticket.HasPresenter(request.ClientId))
{
Logger.LogError("The revocation request was rejected because the " +
"refresh token was issued to a different client.");
return(await SendRevocationResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.InvalidRequest
}));
}
}
var notification = new HandleRevocationRequestContext(Context, Options, request, ticket);
await Options.Provider.HandleRevocationRequest(notification);
if (notification.HandledResponse)
{
return(true);
}
else if (notification.Skipped)
{
return(false);
}
else if (notification.IsRejected)
{
Logger.LogError("The revocation request was rejected with the following error: {Error} ; {Description}",
/* Error: */ notification.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
/* Description: */ notification.ErrorDescription);
return(await SendRevocationResponseAsync(new OpenIdConnectResponse {
Error = notification.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = notification.ErrorDescription,
ErrorUri = notification.ErrorUri
}));
}
if (!notification.Revoked)
{
return(await SendRevocationResponseAsync(new OpenIdConnectResponse {
Error = OpenIdConnectConstants.Errors.UnsupportedTokenType,
ErrorDescription = "The token cannot be revoked."
}));
}
return(await SendRevocationResponseAsync(new OpenIdConnectResponse()));
}
private async Task <bool> InvokeTokenEndpointAsync()
{
if (!string.Equals(Request.Method, "POST", StringComparison.OrdinalIgnoreCase))
{
Logger.LogError("The token request was rejected because an invalid " +
"HTTP method was received: {Method}.", Request.Method);
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "A malformed token request has been received: make sure to use POST."
}));
}
// See http://openid.net/specs/openid-connect-core-1_0.html#FormSerialization
if (string.IsNullOrEmpty(Request.ContentType))
{
Logger.LogError("The token request was rejected because the " +
"mandatory 'Content-Type' header was missing.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "A malformed token request has been received: " +
"the mandatory 'Content-Type' header was missing from the POST request."
}));
}
// May have media/type; charset=utf-8, allow partial match.
if (!Request.ContentType.StartsWith("application/x-www-form-urlencoded", StringComparison.OrdinalIgnoreCase))
{
Logger.LogError("The token request was rejected because an invalid 'Content-Type' " +
"header was received: {ContentType}.", Request.ContentType);
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "A malformed token request has been received: " +
"the 'Content-Type' header contained an unexcepted value. " +
"Make sure to use 'application/x-www-form-urlencoded'."
}));
}
var form = await Request.ReadFormAsync(Context.RequestAborted);
var request = new OpenIdConnectMessage(form.ToDictionary())
{
RequestType = OpenIdConnectRequestType.TokenRequest
};
// Store the token request in the ASP.NET context.
Context.SetOpenIdConnectRequest(request);
// Reject token requests missing the mandatory grant_type parameter.
if (string.IsNullOrEmpty(request.GrantType))
{
Logger.LogError("The token request was rejected because the grant type was missing.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'grant_type' parameter was missing.",
}));
}
// Reject grant_type=authorization_code requests missing the authorization code.
// See https://tools.ietf.org/html/rfc6749#section-4.1.3
else if (request.IsAuthorizationCodeGrantType() && string.IsNullOrEmpty(request.Code))
{
Logger.LogError("The token request was rejected because the authorization code was missing.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'code' parameter was missing."
}));
}
// Reject grant_type=refresh_token requests missing the refresh token.
// See https://tools.ietf.org/html/rfc6749#section-6
else if (request.IsRefreshTokenGrantType() && string.IsNullOrEmpty(request.RefreshToken))
{
Logger.LogError("The token request was rejected because the refresh token was missing.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'refresh_token' parameter was missing."
}));
}
// Reject grant_type=password requests missing username or password.
// See https://tools.ietf.org/html/rfc6749#section-4.3.2
else if (request.IsPasswordGrantType() && (string.IsNullOrEmpty(request.Username) ||
string.IsNullOrEmpty(request.Password)))
{
Logger.LogError("The token request was rejected because the resource owner credentials were missing.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'username' and/or 'password' parameters " +
"was/were missing from the request message."
}));
}
// When client_id and client_secret are both null, try to extract them from the Authorization header.
// See http://tools.ietf.org/html/rfc6749#section-2.3.1 and
// http://openid.net/specs/openid-connect-core-1_0.html#ClientAuthentication
if (string.IsNullOrEmpty(request.ClientId) && string.IsNullOrEmpty(request.ClientSecret))
{
string header = Request.Headers[HeaderNames.Authorization];
if (!string.IsNullOrEmpty(header) && header.StartsWith("Basic ", StringComparison.OrdinalIgnoreCase))
{
try {
var value = header.Substring("Basic ".Length).Trim();
var data = Encoding.UTF8.GetString(Convert.FromBase64String(value));
var index = data.IndexOf(':');
if (index >= 0)
{
request.ClientId = data.Substring(0, index);
request.ClientSecret = data.Substring(index + 1);
}
}
catch (FormatException) { }
catch (ArgumentException) { }
}
}
var validatingContext = new ValidateTokenRequestContext(Context, Options, request);
await Options.Provider.ValidateTokenRequest(validatingContext);
if (validatingContext.IsRejected)
{
Logger.LogInformation("The token request was rejected by application code.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = validatingContext.Error ?? OpenIdConnectConstants.Errors.InvalidClient,
ErrorDescription = validatingContext.ErrorDescription,
ErrorUri = validatingContext.ErrorUri
}));
}
// Reject grant_type=client_credentials requests if validation was skipped.
else if (validatingContext.IsSkipped && request.IsClientCredentialsGrantType())
{
Logger.LogError("The token request must be fully validated to use the client_credentials grant type.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Client authentication is required when using client_credentials."
}));
}
// Ensure that the client_id has been set from the ValidateTokenRequest event.
else if (validatingContext.IsValidated && string.IsNullOrEmpty(request.ClientId))
{
Logger.LogError("The token request was validated but the client_id was not set.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.ServerError,
ErrorDescription = "An internal server error occurred."
}));
}
AuthenticationTicket ticket = null;
// See http://tools.ietf.org/html/rfc6749#section-4.1
// and http://tools.ietf.org/html/rfc6749#section-4.1.3 (authorization code grant).
// See http://tools.ietf.org/html/rfc6749#section-6 (refresh token grant).
if (request.IsAuthorizationCodeGrantType() || request.IsRefreshTokenGrantType())
{
ticket = request.IsAuthorizationCodeGrantType() ?
await DeserializeAuthorizationCodeAsync(request.Code, request) :
await DeserializeRefreshTokenAsync(request.RefreshToken, request);
if (ticket == null)
{
Logger.LogError("The token request was rejected because the " +
"authorization code or the refresh token was invalid.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Invalid ticket"
}));
}
if (!ticket.Properties.ExpiresUtc.HasValue ||
ticket.Properties.ExpiresUtc < Options.SystemClock.UtcNow)
{
Logger.LogError("The token request was rejected because the " +
"authorization code or the refresh token was expired.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Expired ticket"
}));
}
// If the client was fully authenticated when retrieving its refresh token,
// the current request must be rejected if client authentication was not enforced.
if (request.IsRefreshTokenGrantType() && !validatingContext.IsValidated && ticket.IsConfidential())
{
Logger.LogError("The token request was rejected because client authentication " +
"was required to use the confidential refresh token.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Client authentication is required to use this ticket"
}));
}
// Note: presenters may be empty during a grant_type=refresh_token request if the refresh token
// was issued to a public client but cannot be null for an authorization code grant request.
var presenters = ticket.GetPresenters();
if (request.IsAuthorizationCodeGrantType() && !presenters.Any())
{
Logger.LogError("The token request was rejected because the authorization " +
"code didn't contain any valid presenter.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.ServerError,
ErrorDescription = "An internal server error occurred."
}));
}
// At this stage, client_id cannot be null for grant_type=authorization_code requests,
// as it must either be set in the ValidateClientAuthentication notification
// by the developer or manually flowed by non-confidential client applications.
// See https://tools.ietf.org/html/rfc6749#section-4.1.3
if (request.IsAuthorizationCodeGrantType() && string.IsNullOrEmpty(request.ClientId))
{
Logger.LogError("The token request was rejected because the mandatory 'client_id' was missing.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "client_id was missing from the token request"
}));
}
// Ensure the authorization code/refresh token was issued to the client application making the token request.
// Note: when using the refresh token grant, client_id is optional but must validated if present.
// As a consequence, this check doesn't depend on the actual status of client authentication.
// See https://tools.ietf.org/html/rfc6749#section-6
// and http://openid.net/specs/openid-connect-core-1_0.html#RefreshingAccessToken
if (!string.IsNullOrEmpty(request.ClientId) && presenters.Any() &&
!presenters.Contains(request.ClientId, StringComparer.Ordinal))
{
Logger.LogError("The token request was rejected because the authorization " +
"code was issued to a different client application.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Ticket does not contain matching client_id"
}));
}
// Validate the redirect_uri flowed by the client application during this token request.
// Note: for pure OAuth2 requests, redirect_uri is only mandatory if the authorization request
// contained an explicit redirect_uri. OpenID Connect requests MUST include a redirect_uri
// but the specifications allow proceeding the token request without returning an error
// if the authorization request didn't contain an explicit redirect_uri.
// See https://tools.ietf.org/html/rfc6749#section-4.1.3
// and http://openid.net/specs/openid-connect-core-1_0.html#TokenRequestValidation
var address = ticket.GetProperty(OpenIdConnectConstants.Properties.RedirectUri);
if (request.IsAuthorizationCodeGrantType() && !string.IsNullOrEmpty(address))
{
ticket.Properties.Items.Remove(OpenIdConnectConstants.Properties.RedirectUri);
if (string.IsNullOrEmpty(request.RedirectUri))
{
Logger.LogError("The token request was rejected because the mandatory 'redirect_uri' " +
"parameter was missing from the grant_type=authorization_code request.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "redirect_uri was missing from the token request"
}));
}
else if (!string.Equals(address, request.RedirectUri, StringComparison.Ordinal))
{
Logger.LogError("The token request was rejected because the 'redirect_uri' " +
"parameter didn't correspond to the expected value.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Authorization code does not contain matching redirect_uri"
}));
}
}
if (!string.IsNullOrEmpty(request.Scope))
{
// When an explicit scope parameter has been included in the token request
// but was missing from the authorization request, the request MUST be rejected.
// See http://tools.ietf.org/html/rfc6749#section-6
var scopes = ticket.GetScopes();
if (!scopes.Any())
{
Logger.LogError("The token request was rejected because the 'scope' parameter was not allowed.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Token request cannot contain a scope parameter" +
"if the authorization request didn't contain one"
}));
}
// When an explicit scope parameter has been included in the token request,
// the authorization server MUST ensure that it doesn't contain scopes
// that were not allowed during the authorization request.
// See https://tools.ietf.org/html/rfc6749#section-6
else if (!new HashSet <string>(scopes).IsSupersetOf(request.GetScopes()))
{
Logger.LogError("The token request was rejected because the 'scope' parameter was not valid.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Token request doesn't contain a valid scope parameter"
}));
}
// Replace the scopes initially granted by the scopes
// listed by the client application in the token request.
ticket.SetScopes(request.GetScopes());
}
if (request.IsAuthorizationCodeGrantType())
{
// Note: the authentication ticket is copied to avoid modifying the properties of the authorization code.
var context = new GrantAuthorizationCodeContext(Context, Options, request, ticket.Copy());
await Options.Provider.GrantAuthorizationCode(context);
if (!context.IsValidated)
{
// Note: use invalid_grant as the default error if none has been explicitly provided.
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = context.Error ?? OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = context.ErrorDescription,
ErrorUri = context.ErrorUri
}));
}
// By default, when using the authorization code grant, the authentication ticket extracted from the
// authorization code is used as-is. To avoid aligning the expiration date of the generated tokens
// with the lifetime of the authorization code, the ticket properties are automatically reset to null.
if (context.Ticket.Properties.IssuedUtc == ticket.Properties.IssuedUtc)
{
context.Ticket.Properties.IssuedUtc = null;
}
if (context.Ticket.Properties.ExpiresUtc == ticket.Properties.ExpiresUtc)
{
context.Ticket.Properties.ExpiresUtc = null;
}
ticket = context.Ticket;
}
else
{
// Note: the authentication ticket is copied to avoid modifying the properties of the refresh token.
var context = new GrantRefreshTokenContext(Context, Options, request, ticket.Copy());
await Options.Provider.GrantRefreshToken(context);
if (!context.IsValidated)
{
// Note: use invalid_grant as the default error if none has been explicitly provided.
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = context.Error ?? OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = context.ErrorDescription,
ErrorUri = context.ErrorUri
}));
}
// By default, when using the refresh token grant, the authentication ticket extracted from the
// refresh token is used as-is. To avoid aligning the expiration date of the generated tokens
// with the lifetime of the refresh token, the ticket properties are automatically reset to null.
if (context.Ticket.Properties.IssuedUtc == ticket.Properties.IssuedUtc)
{
context.Ticket.Properties.IssuedUtc = null;
}
if (context.Ticket.Properties.ExpiresUtc == ticket.Properties.ExpiresUtc)
{
context.Ticket.Properties.ExpiresUtc = null;
}
ticket = context.Ticket;
}
}
// See http://tools.ietf.org/html/rfc6749#section-4.3
// and http://tools.ietf.org/html/rfc6749#section-4.3.2
else if (request.IsPasswordGrantType())
{
var context = new GrantResourceOwnerCredentialsContext(Context, Options, request);
await Options.Provider.GrantResourceOwnerCredentials(context);
if (!context.IsValidated)
{
// Note: use invalid_grant as the default error if none has been explicitly provided.
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = context.Error ?? OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = context.ErrorDescription,
ErrorUri = context.ErrorUri
}));
}
ticket = context.Ticket;
}
// See http://tools.ietf.org/html/rfc6749#section-4.4
// and http://tools.ietf.org/html/rfc6749#section-4.4.2
else if (request.IsClientCredentialsGrantType())
{
var context = new GrantClientCredentialsContext(Context, Options, request);
await Options.Provider.GrantClientCredentials(context);
if (!context.IsValidated)
{
// Note: use unauthorized_client as the default error if none has been explicitly provided.
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = context.Error ?? OpenIdConnectConstants.Errors.UnauthorizedClient,
ErrorDescription = context.ErrorDescription,
ErrorUri = context.ErrorUri
}));
}
ticket = context.Ticket;
}
// See http://tools.ietf.org/html/rfc6749#section-8.3
else
{
var context = new GrantCustomExtensionContext(Context, Options, request);
await Options.Provider.GrantCustomExtension(context);
if (!context.IsValidated)
{
// Note: use unsupported_grant_type as the default error if none has been explicitly provided.
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = context.Error ?? OpenIdConnectConstants.Errors.UnsupportedGrantType,
ErrorDescription = context.ErrorDescription,
ErrorUri = context.ErrorUri
}));
}
ticket = context.Ticket;
}
var notification = new HandleTokenRequestContext(Context, Options, request, ticket);
await Options.Provider.HandleTokenRequest(notification);
if (notification.HandledResponse)
{
return(true);
}
else if (notification.Skipped)
{
return(false);
}
// Flow the changes made to the ticket.
ticket = notification.Ticket;
// Ensure an authentication ticket has been provided:
// a null ticket MUST result in an internal server error.
if (ticket == null)
{
Logger.LogError("The token request was rejected because no authentication " +
"ticket was returned by application code.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.ServerError
}));
}
if (validatingContext.IsValidated)
{
// Store a boolean indicating whether the ticket should be marked as confidential.
ticket.Properties.Items[OpenIdConnectConstants.Properties.Confidential] = "true";
}
// Always include the "openid" scope when the developer doesn't explicitly call SetScopes.
// Note: the application is allowed to specify a different "scopes": in this case,
// don't replace the "scopes" property stored in the authentication ticket.
if (!ticket.Properties.Items.ContainsKey(OpenIdConnectConstants.Properties.Scopes) &&
request.HasScope(OpenIdConnectConstants.Scopes.OpenId))
{
ticket.Properties.Items[OpenIdConnectConstants.Properties.Scopes] = OpenIdConnectConstants.Scopes.OpenId;
}
string audiences;
// When a "resources" property cannot be found in the authentication properties, infer it from the "audiences" property.
if (!ticket.Properties.Items.ContainsKey(OpenIdConnectConstants.Properties.Resources) &&
ticket.Properties.Items.TryGetValue(OpenIdConnectConstants.Properties.Audiences, out audiences))
{
ticket.Properties.Items[OpenIdConnectConstants.Properties.Resources] = audiences;
}
var response = new OpenIdConnectMessage();
// Note: by default, an access token is always returned, but the client application can use the "response_type" parameter
// to only include specific types of tokens. When this parameter is missing, an access token is always generated.
if (string.IsNullOrEmpty(request.ResponseType) || request.HasResponseType(OpenIdConnectConstants.ResponseTypes.Token))
{
// Make sure to create a copy of the authentication properties
// to avoid modifying the properties set on the original ticket.
var properties = ticket.Properties.Copy();
string resources;
if (!properties.Items.TryGetValue(OpenIdConnectConstants.Properties.Resources, out resources))
{
Logger.LogInformation("No explicit resource has been associated with the authentication ticket: " +
"the access token will thus be issued without any audience attached.");
}
// Note: when the "resource" parameter added to the OpenID Connect response
// is identical to the request parameter, keeping it is not necessary.
if (request.IsAuthorizationCodeGrantType() || (!string.IsNullOrEmpty(request.Resource) &&
!string.Equals(request.Resource, resources, StringComparison.Ordinal)))
{
response.Resource = resources;
}
// Note: when the "scope" parameter added to the OpenID Connect response
// is identical to the request parameter, keeping it is not necessary.
string scopes;
properties.Items.TryGetValue(OpenIdConnectConstants.Properties.Scopes, out scopes);
if (request.IsAuthorizationCodeGrantType() || (!string.IsNullOrEmpty(request.Scope) &&
!string.Equals(request.Scope, scopes, StringComparison.Ordinal)))
{
response.Scope = scopes;
}
response.TokenType = OpenIdConnectConstants.TokenTypes.Bearer;
response.AccessToken = await SerializeAccessTokenAsync(ticket.Principal, properties, request, response);
// Ensure that an access token is issued to avoid returning an invalid response.
// See http://openid.net/specs/oauth-v2-multiple-response-types-1_0.html#Combinations
if (string.IsNullOrEmpty(response.AccessToken))
{
Logger.LogError("An error occurred during the serialization of the " +
"access token and a null value was returned.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.ServerError,
ErrorDescription = "no valid access token was issued"
}));
}
// properties.ExpiresUtc is automatically set by SerializeAccessTokenAsync but the end user
// is free to set a null value directly in the SerializeAccessToken event.
if (properties.ExpiresUtc.HasValue && properties.ExpiresUtc > Options.SystemClock.UtcNow)
{
var lifetime = properties.ExpiresUtc.Value - Options.SystemClock.UtcNow;
var expiration = (long)(lifetime.TotalSeconds + .5);
response.ExpiresIn = expiration.ToString(CultureInfo.InvariantCulture);
}
}
// Note: by default, an identity token is always returned when the "openid" scope has been requested,
// but the client application can use the "response_type" parameter to only include specific types of tokens.
// When this parameter is missing, an identity token is always generated.
if (ticket.HasScope(OpenIdConnectConstants.Scopes.OpenId) &&
(string.IsNullOrEmpty(request.ResponseType) || request.HasResponseType(OpenIdConnectConstants.ResponseTypes.IdToken)))
{
// Make sure to create a copy of the authentication properties
// to avoid modifying the properties set on the original ticket.
var properties = ticket.Properties.Copy();
response.IdToken = await SerializeIdentityTokenAsync(ticket.Principal, properties, request, response);
// Ensure that an identity token is issued to avoid returning an invalid response.
// See http://openid.net/specs/openid-connect-core-1_0.html#TokenResponse
// and http://openid.net/specs/openid-connect-core-1_0.html#RefreshTokenResponse
if (string.IsNullOrEmpty(response.IdToken))
{
Logger.LogError("An error occurred during the serialization of the " +
"identity token and a null value was returned.");
return(await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.ServerError,
ErrorDescription = "no valid identity token was issued"
}));
}
}
// Note: by default, a refresh token is always returned when the "offline_access" scope has been requested,
// but the client application can use the "response_type" parameter to only include specific types of tokens.
// When this parameter is missing, a refresh token is always generated.
if (ticket.HasScope(OpenIdConnectConstants.Scopes.OfflineAccess) &&
(!request.IsRefreshTokenGrantType() || Options.UseSlidingExpiration) &&
(string.IsNullOrEmpty(request.ResponseType) || request.HasResponseType(OpenIdConnectConstants.Parameters.RefreshToken)))
{
// Make sure to create a copy of the authentication properties
// to avoid modifying the properties set on the original ticket.
var properties = ticket.Properties.Copy();
response.RefreshToken = await SerializeRefreshTokenAsync(ticket.Principal, properties, request, response);
}
var payload = new JObject();
foreach (var parameter in response.Parameters)
{
payload.Add(parameter.Key, parameter.Value);
}
var responseNotification = new ApplyTokenResponseContext(Context, Options, ticket, request, payload);
await Options.Provider.ApplyTokenResponse(responseNotification);
if (responseNotification.HandledResponse)
{
return(true);
}
else if (responseNotification.Skipped)
{
return(false);
}
using (var buffer = new MemoryStream())
using (var writer = new JsonTextWriter(new StreamWriter(buffer))) {
payload.WriteTo(writer);
writer.Flush();
Response.ContentLength = buffer.Length;
Response.ContentType = "application/json;charset=UTF-8";
Response.Headers[HeaderNames.CacheControl] = "no-cache";
Response.Headers[HeaderNames.Pragma] = "no-cache";
Response.Headers[HeaderNames.Expires] = "-1";
buffer.Seek(offset: 0, loc: SeekOrigin.Begin);
await buffer.CopyToAsync(Response.Body, 4096, Context.RequestAborted);
return(true);
}
}
private async Task <bool> InvokeIntrospectionEndpointAsync()
{
OpenIdConnectMessage request;
// See https://tools.ietf.org/html/rfc7662#section-2.1
// and https://tools.ietf.org/html/rfc7662#section-4
if (string.Equals(Request.Method, "GET", StringComparison.OrdinalIgnoreCase))
{
request = new OpenIdConnectMessage(Request.Query)
{
RequestType = OpenIdConnectRequestType.AuthenticationRequest
};
}
else if (string.Equals(Request.Method, "POST", StringComparison.OrdinalIgnoreCase))
{
// See http://openid.net/specs/openid-connect-core-1_0.html#FormSerialization
if (string.IsNullOrEmpty(Request.ContentType))
{
Options.Logger.LogError("The introspection request was rejected because " +
"the mandatory 'Content-Type' header was missing.");
return(await SendIntrospectionResponseAsync(null, new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "A malformed introspection request has been received: " +
"the mandatory 'Content-Type' header was missing from the POST request."
}));
}
// May have media/type; charset=utf-8, allow partial match.
if (!Request.ContentType.StartsWith("application/x-www-form-urlencoded", StringComparison.OrdinalIgnoreCase))
{
Options.Logger.LogError("The introspection request was rejected because an invalid 'Content-Type' " +
"header was received: {ContentType}.", Request.ContentType);
return(await SendIntrospectionResponseAsync(null, new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "A malformed introspection request has been received: " +
"the 'Content-Type' header contained an unexcepted value. " +
"Make sure to use 'application/x-www-form-urlencoded'."
}));
}
request = new OpenIdConnectMessage(await Request.ReadFormAsync())
{
RequestType = OpenIdConnectRequestType.AuthenticationRequest
};
}
else
{
Options.Logger.LogError("The introspection request was rejected because an invalid " +
"HTTP method was received: {Method}.", Request.Method);
return(await SendIntrospectionResponseAsync(null, new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "A malformed introspection request has been received: " +
"make sure to use either GET or POST."
}));
}
if (string.IsNullOrWhiteSpace(request.Token))
{
return(await SendIntrospectionResponseAsync(request, new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "A malformed introspection request has been received: " +
"a 'token' parameter with an access, refresh, or identity token is required."
}));
}
// Insert the introspection request in the OWIN context.
Context.SetOpenIdConnectRequest(request);
// When client_id and client_secret are both null, try to extract them from the Authorization header.
// See http://tools.ietf.org/html/rfc6749#section-2.3.1 and
// http://openid.net/specs/openid-connect-core-1_0.html#ClientAuthentication
if (string.IsNullOrEmpty(request.ClientId) && string.IsNullOrEmpty(request.ClientSecret))
{
var header = Request.Headers.Get("Authorization");
if (!string.IsNullOrEmpty(header) && header.StartsWith("Basic ", StringComparison.OrdinalIgnoreCase))
{
try {
var value = header.Substring("Basic ".Length).Trim();
var data = Encoding.UTF8.GetString(Convert.FromBase64String(value));
var index = data.IndexOf(':');
if (index >= 0)
{
request.ClientId = data.Substring(0, index);
request.ClientSecret = data.Substring(index + 1);
}
}
catch (FormatException) { }
catch (ArgumentException) { }
}
}
var context = new ValidateIntrospectionRequestContext(Context, Options, request);
await Options.Provider.ValidateIntrospectionRequest(context);
if (context.IsRejected)
{
Options.Logger.LogInformation("The introspection request was rejected by application code.");
return(await SendIntrospectionResponseAsync(request, new OpenIdConnectMessage {
Error = context.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = context.ErrorDescription,
ErrorUri = context.ErrorUri
}));
}
// Ensure that the client_id has been set from the ValidateIntrospectionRequest event.
else if (context.IsValidated && string.IsNullOrEmpty(request.ClientId))
{
Options.Logger.LogError("The introspection request was validated but the client_id was not set.");
return(await SendIntrospectionResponseAsync(request, new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.ServerError,
ErrorDescription = "An internal server error occurred."
}));
}
AuthenticationTicket ticket = null;
// Note: use the "token_type_hint" parameter to determine
// the type of the token sent by the client application.
// See https://tools.ietf.org/html/rfc7662#section-2.1
switch (request.GetTokenTypeHint())
{
case OpenIdConnectConstants.Usages.AccessToken:
ticket = await DeserializeAccessTokenAsync(request.Token, request);
break;
case OpenIdConnectConstants.Usages.RefreshToken:
ticket = await DeserializeRefreshTokenAsync(request.Token, request);
break;
case OpenIdConnectConstants.Usages.IdToken:
ticket = await DeserializeIdentityTokenAsync(request.Token, request);
break;
}
// Note: if the token can't be found using "token_type_hint",
// the search must be extended to all supported token types.
// See https://tools.ietf.org/html/rfc7662#section-2.1
if (ticket == null)
{
ticket = await DeserializeAccessTokenAsync(request.Token, request) ??
await DeserializeIdentityTokenAsync(request.Token, request) ??
await DeserializeRefreshTokenAsync(request.Token, request);
}
if (ticket == null)
{
Options.Logger.LogInformation("The introspection request was rejected because the token was invalid.");
return(await SendIntrospectionResponseAsync(request, new JObject {
[OpenIdConnectConstants.Claims.Active] = false
}));
}
// Note: unlike refresh or identity tokens that can only be validated by client applications,
// access tokens can be validated by either resource servers or client applications:
// in both cases, the caller must be authenticated if the ticket is marked as confidential.
if (context.IsSkipped && ticket.IsConfidential())
{
Options.Logger.LogWarning("The introspection request was rejected because the caller was not authenticated.");
return(await SendIntrospectionResponseAsync(request, new JObject {
[OpenIdConnectConstants.Claims.Active] = false
}));
}
// If the ticket is already expired, directly return active=false.
if (ticket.Properties.ExpiresUtc.HasValue &&
ticket.Properties.ExpiresUtc < Options.SystemClock.UtcNow)
{
Options.Logger.LogInformation("The introspection request was rejected because the token was expired.");
return(await SendIntrospectionResponseAsync(request, new JObject {
[OpenIdConnectConstants.Claims.Active] = false
}));
}
// When a client_id can be inferred from the introspection request,
// ensure that the client application is a valid audience/presenter.
if (!string.IsNullOrEmpty(request.ClientId))
{
// Ensure the caller is listed as a valid audience or authorized presenter.
if (ticket.IsAccessToken() && ticket.HasAudience() && !ticket.HasAudience(request.ClientId) &&
ticket.HasPresenter() && !ticket.HasPresenter(request.ClientId))
{
Options.Logger.LogWarning("The introspection request was rejected because the access token " +
"was issued to a different client or for another resource server.");
return(await SendIntrospectionResponseAsync(request, new JObject {
[OpenIdConnectConstants.Claims.Active] = false
}));
}
// Reject the request if the caller is not listed as a valid audience.
else if (ticket.IsIdentityToken() && ticket.HasAudience() && !ticket.HasAudience(request.ClientId))
{
Options.Logger.LogWarning("The introspection request was rejected because the " +
"identity token was issued to a different client.");
return(await SendIntrospectionResponseAsync(request, new JObject {
[OpenIdConnectConstants.Claims.Active] = false
}));
}
// Reject the introspection request if the caller doesn't
// correspond to the client application the token was issued to.
else if (ticket.IsRefreshToken() && ticket.HasPresenter() && !ticket.HasPresenter(request.ClientId))
{
Options.Logger.LogWarning("The introspection request was rejected because the " +
"refresh token was issued to a different client.");
return(await SendIntrospectionResponseAsync(request, new JObject {
[OpenIdConnectConstants.Claims.Active] = false
}));
}
}
var notification = new HandleIntrospectionRequestContext(Context, Options, request, ticket);
notification.Active = true;
// Use the unique ticket identifier to populate the "jti" claim.
notification.TokenId = ticket.GetTicketId();
// Note: only set "token_type" when the received token is an access token.
// See https://tools.ietf.org/html/rfc7662#section-2.2
// and https://tools.ietf.org/html/rfc6749#section-5.1
if (ticket.IsAccessToken())
{
notification.TokenType = OpenIdConnectConstants.TokenTypes.Bearer;
}
notification.Issuer = Context.GetIssuer(Options);
notification.Subject = ticket.Identity.GetClaim(ClaimTypes.NameIdentifier);
notification.IssuedAt = ticket.Properties.IssuedUtc;
notification.ExpiresAt = ticket.Properties.ExpiresUtc;
// Copy the audiences extracted from the "aud" claim.
foreach (var audience in ticket.GetAudiences())
{
notification.Audiences.Add(audience);
}
// Note: non-metadata claims are only added if the caller is authenticated
// AND is in the specified audiences, unless there's so explicit audience.
if (!ticket.HasAudience() || (!string.IsNullOrEmpty(request.ClientId) && ticket.HasAudience(request.ClientId)))
{
notification.Username = ticket.Identity.Name;
notification.Scope = ticket.GetProperty(OpenIdConnectConstants.Properties.Scopes);
// Potentially sensitive claims are only exposed to trusted callers
// if the ticket corresponds to an access or identity token.
if (ticket.IsAccessToken() || ticket.IsIdentityToken())
{
foreach (var claim in ticket.Identity.Claims)
{
// Exclude standard claims, that are already handled via strongly-typed properties.
// Make sure to always update this list when adding new built-in claim properties.
if (string.Equals(claim.Type, ticket.Identity.NameClaimType, StringComparison.Ordinal) ||
string.Equals(claim.Type, ClaimTypes.NameIdentifier, StringComparison.Ordinal))
{
continue;
}
if (string.Equals(claim.Type, OpenIdConnectConstants.Claims.Audience, StringComparison.Ordinal) ||
string.Equals(claim.Type, OpenIdConnectConstants.Claims.ExpiresAt, StringComparison.Ordinal) ||
string.Equals(claim.Type, OpenIdConnectConstants.Claims.IssuedAt, StringComparison.Ordinal) ||
string.Equals(claim.Type, OpenIdConnectConstants.Claims.Issuer, StringComparison.Ordinal) ||
string.Equals(claim.Type, OpenIdConnectConstants.Claims.NotBefore, StringComparison.Ordinal) ||
string.Equals(claim.Type, OpenIdConnectConstants.Claims.Scope, StringComparison.Ordinal) ||
string.Equals(claim.Type, OpenIdConnectConstants.Claims.Subject, StringComparison.Ordinal) ||
string.Equals(claim.Type, OpenIdConnectConstants.Claims.TokenType, StringComparison.Ordinal))
{
continue;
}
string type;
// Try to resolve the short name associated with the claim type:
// if none can be found, the claim type is used as-is.
if (!JwtSecurityTokenHandler.OutboundClaimTypeMap.TryGetValue(claim.Type, out type))
{
type = claim.Type;
}
// Note: make sure to use the indexer
// syntax to avoid duplicate properties.
notification.Claims[type] = claim.Value;
}
}
}
await Options.Provider.HandleIntrospectionRequest(notification);
if (notification.HandledResponse)
{
return(true);
}
else if (notification.Skipped)
{
return(false);
}
var response = new JObject();
response.Add(OpenIdConnectConstants.Claims.Active, notification.Active);
// Only add the other properties if
// the token is considered as active.
if (notification.Active)
{
if (!string.IsNullOrEmpty(notification.Issuer))
{
response.Add(OpenIdConnectConstants.Claims.Issuer, notification.Issuer);
}
if (!string.IsNullOrEmpty(notification.Username))
{
response.Add(OpenIdConnectConstants.Claims.Username, notification.Username);
}
if (!string.IsNullOrEmpty(notification.Subject))
{
response.Add(OpenIdConnectConstants.Claims.Subject, notification.Subject);
}
if (!string.IsNullOrEmpty(notification.Scope))
{
response.Add(OpenIdConnectConstants.Claims.Scope, notification.Scope);
}
if (notification.IssuedAt.HasValue)
{
response.Add(OpenIdConnectConstants.Claims.IssuedAt,
EpochTime.GetIntDate(notification.IssuedAt.Value.UtcDateTime));
response.Add(OpenIdConnectConstants.Claims.NotBefore,
EpochTime.GetIntDate(notification.IssuedAt.Value.UtcDateTime));
}
if (notification.ExpiresAt.HasValue)
{
response.Add(OpenIdConnectConstants.Claims.ExpiresAt,
EpochTime.GetIntDate(notification.ExpiresAt.Value.UtcDateTime));
}
if (!string.IsNullOrEmpty(notification.TokenId))
{
response.Add(OpenIdConnectConstants.Claims.JwtId, notification.TokenId);
}
if (!string.IsNullOrEmpty(notification.TokenType))
{
response.Add(OpenIdConnectConstants.Claims.TokenType, notification.TokenType);
}
switch (notification.Audiences.Count)
{
case 0: break;
case 1:
response.Add(OpenIdConnectConstants.Claims.Audience, notification.Audiences[0]);
break;
default:
response.Add(OpenIdConnectConstants.Claims.Audience, JArray.FromObject(notification.Audiences));
break;
}
foreach (var claim in notification.Claims)
{
// Ignore claims whose value is null.
if (claim.Value == null)
{
continue;
}
// Note: make sure to use the indexer
// syntax to avoid duplicate properties.
response[claim.Key] = claim.Value;
}
}
return(await SendIntrospectionResponseAsync(request, response));
}
private async Task <string> SerializeAccessTokenAsync(
ClaimsPrincipal principal, AuthenticationProperties properties,
OpenIdConnectMessage request, OpenIdConnectMessage response)
{
// properties.IssuedUtc and properties.ExpiresUtc
// should always be preferred when explicitly set.
if (properties.IssuedUtc == null)
{
properties.IssuedUtc = Options.SystemClock.UtcNow;
}
if (properties.ExpiresUtc == null)
{
properties.ExpiresUtc = properties.IssuedUtc + Options.AccessTokenLifetime;
}
properties.SetUsage(OpenIdConnectConstants.Usages.AccessToken);
// Create a new principal containing only the filtered claims.
// Actors identities are also filtered (delegation scenarios).
principal = principal.Clone(claim => {
// ClaimTypes.NameIdentifier and JwtRegisteredClaimNames.Sub are never excluded.
if (string.Equals(claim.Type, ClaimTypes.NameIdentifier, StringComparison.Ordinal) ||
string.Equals(claim.Type, JwtRegisteredClaimNames.Sub, StringComparison.Ordinal))
{
return(true);
}
// Claims whose destination is not explicitly referenced or
// doesn't contain "token" are not included in the access token.
return(claim.HasDestination(OpenIdConnectConstants.ResponseTypes.Token));
});
var identity = (ClaimsIdentity)principal.Identity;
// Create a new ticket containing the updated properties and the filtered principal.
var ticket = new AuthenticationTicket(principal, properties, Options.AuthenticationScheme);
var notification = new SerializeAccessTokenContext(Context, Options, request, response, ticket)
{
Client = request.ClientId,
Confidential = ticket.IsConfidential(),
DataFormat = Options.AccessTokenFormat,
Issuer = Context.GetIssuer(Options),
SecurityTokenHandler = Options.AccessTokenHandler,
SigningCredentials = Options.SigningCredentials.FirstOrDefault()
};
foreach (var audience in properties.GetResources())
{
notification.Audiences.Add(audience);
}
foreach (var scope in properties.GetScopes())
{
notification.Scopes.Add(scope);
}
await Options.Provider.SerializeAccessToken(notification);
if (!string.IsNullOrEmpty(notification.AccessToken))
{
return(notification.AccessToken);
}
// Allow the application to change the authentication
// ticket from the SerializeAccessTokenAsync event.
ticket = notification.AuthenticationTicket;
ticket.Properties.CopyTo(properties);
if (notification.SecurityTokenHandler == null)
{
return(notification.DataFormat?.Protect(ticket));
}
// Extract the main identity from the principal.
identity = (ClaimsIdentity)ticket.Principal.Identity;
// Store the "usage" property as a claim.
identity.AddClaim(OpenIdConnectConstants.Extra.Usage, ticket.Properties.GetUsage());
// If the ticket is marked as confidential, add a new
// "confidential" claim in the security token.
if (notification.Confidential)
{
identity.AddClaim(new Claim(OpenIdConnectConstants.Extra.Confidential, "true", ClaimValueTypes.Boolean));
}
// Create a new claim per scope item, that will result
// in a "scope" array being added in the access token.
foreach (var scope in notification.Scopes)
{
identity.AddClaim(OpenIdConnectConstants.Claims.Scope, scope);
}
// Note: when used as an access token, a JWT token doesn't have to expose a "sub" claim
// but the name identifier claim is used as a substitute when it has been explicitly added.
// See https://tools.ietf.org/html/rfc7519#section-4.1.2
var subject = identity.FindFirst(JwtRegisteredClaimNames.Sub);
if (subject == null)
{
var identifier = identity.FindFirst(ClaimTypes.NameIdentifier);
if (identifier != null)
{
identity.AddClaim(JwtRegisteredClaimNames.Sub, identifier.Value);
}
}
// Remove the ClaimTypes.NameIdentifier claims to avoid getting duplicate claims.
// Note: the "sub" claim is automatically mapped by JwtSecurityTokenHandler
// to ClaimTypes.NameIdentifier when validating a JWT token.
// Note: make sure to call ToArray() to avoid an InvalidOperationException
// on old versions of Mono, where FindAll() is implemented using an iterator.
foreach (var claim in identity.FindAll(ClaimTypes.NameIdentifier).ToArray())
{
identity.RemoveClaim(claim);
}
// Store the audiences as claims.
foreach (var audience in notification.Audiences)
{
identity.AddClaim(JwtRegisteredClaimNames.Aud, audience);
}
// List the client application as an authorized party.
if (!string.IsNullOrEmpty(notification.Client))
{
identity.AddClaim(JwtRegisteredClaimNames.Azp, notification.Client);
}
var handler = notification.SecurityTokenHandler as JwtSecurityTokenHandler;
if (handler != null)
{
var token = handler.CreateToken(
subject: identity,
issuer: notification.Issuer,
signingCredentials: notification.SigningCredentials,
issuedAt: ticket.Properties.IssuedUtc.Value.UtcDateTime,
notBefore: ticket.Properties.IssuedUtc.Value.UtcDateTime,
expires: ticket.Properties.ExpiresUtc.Value.UtcDateTime);
if (notification.SigningCredentials != null)
{
var x509SecurityKey = notification.SigningCredentials.Key as X509SecurityKey;
if (x509SecurityKey != null)
{
// Note: unlike "kid", "x5t" is not automatically added by JwtHeader's constructor in IdentityModel for ASP.NET 5.
// Though not required by the specifications, this property is needed for IdentityModel for Katana to work correctly.
// See https://github.com/aspnet-contrib/AspNet.Security.OpenIdConnect.Server/issues/132
// and https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/issues/181.
token.Header[JwtHeaderParameterNames.X5t] = Base64UrlEncoder.Encode(x509SecurityKey.Certificate.GetCertHash());
}
object identifier;
if (!token.Header.TryGetValue(JwtHeaderParameterNames.Kid, out identifier) || identifier == null)
{
// When the token doesn't contain a "kid" parameter in the header, automatically
// add one using the identifier specified in the signing credentials.
identifier = notification.SigningCredentials.Kid;
if (identifier == null)
{
// When no key identifier has been explicitly added by the developer, a "kid" is automatically
// inferred from the hexadecimal representation of the certificate thumbprint (SHA-1).
if (x509SecurityKey != null)
{
identifier = x509SecurityKey.Certificate.Thumbprint;
}
// When no key identifier has been explicitly added by the developer, a "kid"
// is automatically inferred from the modulus if the signing key is a RSA key.
var rsaSecurityKey = notification.SigningCredentials.Key as RsaSecurityKey;
if (rsaSecurityKey != null)
{
// Only use the 40 first chars to match the identifier used by the JWKS endpoint.
identifier = Base64UrlEncoder.Encode(rsaSecurityKey.Parameters.Modulus)
.Substring(0, 40)
.ToUpperInvariant();
}
}
token.Header[JwtHeaderParameterNames.Kid] = identifier;
}
}
return(handler.WriteToken(token));
}
else
{
var token = notification.SecurityTokenHandler.CreateToken(new SecurityTokenDescriptor {
Claims = ticket.Principal.Claims,
Issuer = notification.Issuer,
Audience = notification.Audiences.ElementAtOrDefault(0),
SigningCredentials = notification.SigningCredentials,
IssuedAt = notification.AuthenticationTicket.Properties.IssuedUtc.Value.UtcDateTime,
NotBefore = notification.AuthenticationTicket.Properties.IssuedUtc.Value.UtcDateTime,
Expires = notification.AuthenticationTicket.Properties.ExpiresUtc.Value.UtcDateTime
});
// Note: the security token is manually serialized to prevent
// an exception from being thrown if the handler doesn't implement
// the SecurityTokenHandler.WriteToken overload returning a string.
var builder = new StringBuilder();
using (var writer = XmlWriter.Create(builder, new XmlWriterSettings {
Encoding = new UTF8Encoding(false), OmitXmlDeclaration = true
})) {
notification.SecurityTokenHandler.WriteToken(writer, token);
}
return(builder.ToString());
}
}
private async Task <string> SerializeIdentityTokenAsync(
ClaimsPrincipal principal, AuthenticationProperties properties,
OpenIdConnectMessage request, OpenIdConnectMessage response)
{
// properties.IssuedUtc and properties.ExpiresUtc
// should always be preferred when explicitly set.
if (properties.IssuedUtc == null)
{
properties.IssuedUtc = Options.SystemClock.UtcNow;
}
if (properties.ExpiresUtc == null)
{
properties.ExpiresUtc = properties.IssuedUtc + Options.IdentityTokenLifetime;
}
properties.SetUsage(OpenIdConnectConstants.Usages.IdToken);
// Replace the principal by a new one containing only the filtered claims.
// Actors identities are also filtered (delegation scenarios).
principal = principal.Clone(claim => {
// ClaimTypes.NameIdentifier and JwtRegisteredClaimNames.Sub are never excluded.
if (string.Equals(claim.Type, ClaimTypes.NameIdentifier, StringComparison.Ordinal) ||
string.Equals(claim.Type, JwtRegisteredClaimNames.Sub, StringComparison.Ordinal))
{
return(true);
}
// Claims whose destination is not explicitly referenced or
// doesn't contain "id_token" are not included in the identity token.
return(claim.HasDestination(OpenIdConnectConstants.ResponseTypes.IdToken));
});
var identity = (ClaimsIdentity)principal.Identity;
// Create a new ticket containing the updated properties and the filtered principal.
var ticket = new AuthenticationTicket(principal, properties, Options.AuthenticationScheme);
var notification = new SerializeIdentityTokenContext(Context, Options, request, response, ticket)
{
Confidential = ticket.IsConfidential(),
Issuer = Context.GetIssuer(Options),
Nonce = request.Nonce,
SecurityTokenHandler = Options.IdentityTokenHandler,
SigningCredentials = Options.SigningCredentials.FirstOrDefault()
};
// If a nonce was present in the authorization request, it MUST
// be included in the id_token generated by the token endpoint.
// See http://openid.net/specs/openid-connect-core-1_0.html#IDTokenValidation
if (request.IsAuthorizationCodeGrantType())
{
// Restore the nonce stored in the authentication
// ticket extracted from the authorization code.
notification.Nonce = ticket.GetNonce();
}
// While the 'sub' claim is declared mandatory by the OIDC specs,
// it is not always issued as-is by the authorization servers.
// When missing, the name identifier claim is used as a substitute.
// See http://openid.net/specs/openid-connect-core-1_0.html#IDToken
notification.Subject = identity.GetClaim(JwtRegisteredClaimNames.Sub) ??
identity.GetClaim(ClaimTypes.NameIdentifier);
// Only add client_id in the audiences list if it is non-null.
if (!string.IsNullOrEmpty(request.ClientId))
{
notification.Audiences.Add(request.ClientId);
}
if (!string.IsNullOrEmpty(response.Code))
{
using (var algorithm = SHA256.Create()) {
// Create the c_hash using the authorization code returned by SerializeAuthorizationCodeAsync.
var hash = algorithm.ComputeHash(Encoding.ASCII.GetBytes(response.Code));
// Note: only the left-most half of the hash of the octets is used.
// See http://openid.net/specs/openid-connect-core-1_0.html#HybridIDToken
notification.CHash = Base64UrlEncoder.Encode(hash, 0, hash.Length / 2);
}
}
if (!string.IsNullOrEmpty(response.AccessToken))
{
using (var algorithm = SHA256.Create()) {
// Create the at_hash using the access token returned by SerializeAccessTokenAsync.
var hash = algorithm.ComputeHash(Encoding.ASCII.GetBytes(response.AccessToken));
// Note: only the left-most half of the hash of the octets is used.
// See http://openid.net/specs/openid-connect-core-1_0.html#CodeIDToken
notification.AtHash = Base64UrlEncoder.Encode(hash, 0, hash.Length / 2);
}
}
await Options.Provider.SerializeIdentityToken(notification);
if (!string.IsNullOrEmpty(notification.IdentityToken))
{
return(notification.IdentityToken);
}
// Allow the application to change the authentication
// ticket from the SerializeIdentityTokenAsync event.
ticket = notification.AuthenticationTicket;
ticket.Properties.CopyTo(properties);
if (notification.SecurityTokenHandler == null)
{
return(null);
}
if (string.IsNullOrEmpty(notification.Subject))
{
Logger.LogError("A unique identifier cannot be found to generate a 'sub' claim. " +
"Make sure to either add a 'sub' or a 'ClaimTypes.NameIdentifier' claim " +
"in the returned ClaimsIdentity before calling SignIn.");
return(null);
}
// Extract the main identity from the principal.
identity = (ClaimsIdentity)ticket.Principal.Identity;
// Remove the ClaimTypes.NameIdentifier claims to avoid getting duplicate claims.
// Note: the "sub" claim is automatically mapped by JwtSecurityTokenHandler
// to ClaimTypes.NameIdentifier when validating a JWT token.
// Note: make sure to call ToArray() to avoid an InvalidOperationException
// on old versions of Mono, where FindAll() is implemented using an iterator.
foreach (var claim in identity.FindAll(ClaimTypes.NameIdentifier).ToArray())
{
identity.RemoveClaim(claim);
}
// Store the unique subject identifier as a claim.
identity.AddClaim(JwtRegisteredClaimNames.Sub, notification.Subject);
// Store the "usage" property as a claim.
identity.AddClaim(OpenIdConnectConstants.Extra.Usage, ticket.Properties.GetUsage());
// Store the audiences as claims.
foreach (var audience in notification.Audiences)
{
identity.AddClaim(JwtRegisteredClaimNames.Aud, audience);
}
if (!string.IsNullOrEmpty(notification.AtHash))
{
identity.AddClaim(JwtRegisteredClaimNames.AtHash, notification.AtHash);
}
if (!string.IsNullOrEmpty(notification.CHash))
{
identity.AddClaim(JwtRegisteredClaimNames.CHash, notification.CHash);
}
if (!string.IsNullOrEmpty(notification.Nonce))
{
identity.AddClaim(JwtRegisteredClaimNames.Nonce, notification.Nonce);
}
// If the ticket is marked as confidential, add a new
// "confidential" claim in the security token.
if (notification.Confidential)
{
identity.AddClaim(new Claim(OpenIdConnectConstants.Extra.Confidential, "true", ClaimValueTypes.Boolean));
}
var token = notification.SecurityTokenHandler.CreateToken(
subject: identity,
issuer: notification.Issuer,
signingCredentials: notification.SigningCredentials,
issuedAt: ticket.Properties.IssuedUtc.Value.UtcDateTime,
notBefore: ticket.Properties.IssuedUtc.Value.UtcDateTime,
expires: ticket.Properties.ExpiresUtc.Value.UtcDateTime);
if (notification.SigningCredentials != null)
{
var x509SecurityKey = notification.SigningCredentials.Key as X509SecurityKey;
if (x509SecurityKey != null)
{
// Note: unlike "kid", "x5t" is not automatically added by JwtHeader's constructor in IdentityModel for ASP.NET 5.
// Though not required by the specifications, this property is needed for IdentityModel for Katana to work correctly.
// See https://github.com/aspnet-contrib/AspNet.Security.OpenIdConnect.Server/issues/132
// and https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/issues/181.
token.Header[JwtHeaderParameterNames.X5t] = Base64UrlEncoder.Encode(x509SecurityKey.Certificate.GetCertHash());
}
object identifier;
if (!token.Header.TryGetValue(JwtHeaderParameterNames.Kid, out identifier) || identifier == null)
{
// When the token doesn't contain a "kid" parameter in the header, automatically
// add one using the identifier specified in the signing credentials.
identifier = notification.SigningCredentials.Kid;
if (identifier == null)
{
// When no key identifier has been explicitly added by the developer, a "kid" is automatically
// inferred from the hexadecimal representation of the certificate thumbprint (SHA-1).
if (x509SecurityKey != null)
{
identifier = x509SecurityKey.Certificate.Thumbprint;
}
// When no key identifier has been explicitly added by the developer, a "kid"
// is automatically inferred from the modulus if the signing key is a RSA key.
var rsaSecurityKey = notification.SigningCredentials.Key as RsaSecurityKey;
if (rsaSecurityKey != null)
{
// Only use the 40 first chars to match the identifier used by the JWKS endpoint.
identifier = Base64UrlEncoder.Encode(rsaSecurityKey.Parameters.Modulus)
.Substring(0, 40)
.ToUpperInvariant();
}
}
token.Header[JwtHeaderParameterNames.Kid] = identifier;
}
}
return(notification.SecurityTokenHandler.WriteToken(token));
}
private async Task <string> SerializeAccessTokenAsync(
ClaimsPrincipal principal, AuthenticationProperties properties,
OpenIdConnectMessage request, OpenIdConnectMessage response)
{
// properties.IssuedUtc and properties.ExpiresUtc
// should always be preferred when explicitly set.
if (properties.IssuedUtc == null)
{
properties.IssuedUtc = Options.SystemClock.UtcNow;
}
if (properties.ExpiresUtc == null)
{
properties.ExpiresUtc = properties.IssuedUtc + Options.AccessTokenLifetime;
}
// Create a new principal containing only the filtered claims.
// Actors identities are also filtered (delegation scenarios).
principal = principal.Clone(claim => {
// Never exclude ClaimTypes.NameIdentifier.
if (string.Equals(claim.Type, ClaimTypes.NameIdentifier, StringComparison.OrdinalIgnoreCase))
{
return(true);
}
// Claims whose destination is not explicitly referenced or doesn't
// contain "access_token" are not included in the access token.
return(claim.HasDestination(OpenIdConnectConstants.Destinations.AccessToken));
});
var identity = (ClaimsIdentity)principal.Identity;
// Create a new ticket containing the updated properties and the filtered principal.
var ticket = new AuthenticationTicket(principal, properties, Options.AuthenticationScheme);
ticket.SetUsage(OpenIdConnectConstants.Usages.AccessToken);
ticket.SetAudiences(ticket.GetResources());
// By default, add the client_id to the list of the
// presenters allowed to use the access token.
if (!string.IsNullOrEmpty(request.ClientId))
{
ticket.SetPresenters(request.ClientId);
}
var notification = new SerializeAccessTokenContext(Context, Options, request, response, ticket)
{
DataFormat = Options.AccessTokenFormat,
Issuer = Context.GetIssuer(Options),
SecurityTokenHandler = Options.AccessTokenHandler,
SigningCredentials = Options.SigningCredentials.FirstOrDefault()
};
await Options.Provider.SerializeAccessToken(notification);
if (!string.IsNullOrEmpty(notification.AccessToken))
{
return(notification.AccessToken);
}
if (notification.SecurityTokenHandler == null)
{
return(notification.DataFormat?.Protect(ticket));
}
// Extract the main identity from the principal.
identity = (ClaimsIdentity)ticket.Principal.Identity;
// Store the "usage" property as a claim.
identity.AddClaim(OpenIdConnectConstants.Claims.Usage, ticket.GetUsage());
// If the ticket is marked as confidential, add a new
// "confidential" claim in the security token.
if (ticket.IsConfidential())
{
identity.AddClaim(new Claim(OpenIdConnectConstants.Claims.Confidential, "true", ClaimValueTypes.Boolean));
}
// Create a new claim per scope item, that will result
// in a "scope" array being added in the access token.
foreach (var scope in ticket.GetScopes())
{
identity.AddClaim(OpenIdConnectConstants.Claims.Scope, scope);
}
var handler = notification.SecurityTokenHandler as JwtSecurityTokenHandler;
if (handler != null)
{
// Note: when used as an access token, a JWT token doesn't have to expose a "sub" claim
// but the name identifier claim is used as a substitute when it has been explicitly added.
// See https://tools.ietf.org/html/rfc7519#section-4.1.2
var subject = identity.FindFirst(JwtRegisteredClaimNames.Sub);
if (subject == null)
{
var identifier = identity.FindFirst(ClaimTypes.NameIdentifier);
if (identifier != null)
{
identity.AddClaim(JwtRegisteredClaimNames.Sub, identifier.Value);
}
}
// Remove the ClaimTypes.NameIdentifier claims to avoid getting duplicate claims.
// Note: the "sub" claim is automatically mapped by JwtSecurityTokenHandler
// to ClaimTypes.NameIdentifier when validating a JWT token.
// Note: make sure to call ToArray() to avoid an InvalidOperationException
// on old versions of Mono, where FindAll() is implemented using an iterator.
foreach (var claim in identity.FindAll(ClaimTypes.NameIdentifier).ToArray())
{
identity.RemoveClaim(claim);
}
// Store the audiences as claims.
foreach (var audience in ticket.GetAudiences())
{
identity.AddClaim(JwtRegisteredClaimNames.Aud, audience);
}
// Extract the presenters from the authentication ticket.
var presenters = ticket.GetPresenters().ToArray();
switch (presenters.Length)
{
case 0: break;
case 1:
identity.AddClaim(JwtRegisteredClaimNames.Azp, presenters[0]);
break;
default:
Logger.LogWarning("Multiple presenters have been associated with the access token " +
"but the JWT format only accepts single values.");
// Only add the first authorized party.
identity.AddClaim(JwtRegisteredClaimNames.Azp, presenters[0]);
break;
}
var token = handler.CreateJwtSecurityToken(
subject: identity,
issuer: notification.Issuer,
signingCredentials: notification.SigningCredentials,
issuedAt: ticket.Properties.IssuedUtc.Value.UtcDateTime,
notBefore: ticket.Properties.IssuedUtc.Value.UtcDateTime,
expires: ticket.Properties.ExpiresUtc.Value.UtcDateTime);
var x509SecurityKey = notification.SigningCredentials?.Key as X509SecurityKey;
if (x509SecurityKey != null)
{
// Note: unlike "kid", "x5t" is not automatically added by JwtHeader's constructor in IdentityModel for .NET Core.
// Though not required by the specifications, this property is needed for IdentityModel for Katana to work correctly.
// See https://github.com/aspnet-contrib/AspNet.Security.OpenIdConnect.Server/issues/132
// and https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/issues/181.
token.Header[JwtHeaderParameterNames.X5t] = Base64UrlEncoder.Encode(x509SecurityKey.Certificate.GetCertHash());
}
return(handler.WriteToken(token));
}
else
{
var token = notification.SecurityTokenHandler.CreateToken(new SecurityTokenDescriptor {
Subject = identity,
Issuer = notification.Issuer,
Audience = notification.Audiences.ElementAtOrDefault(0),
SigningCredentials = notification.SigningCredentials,
IssuedAt = notification.Ticket.Properties.IssuedUtc.Value.UtcDateTime,
NotBefore = notification.Ticket.Properties.IssuedUtc.Value.UtcDateTime,
Expires = notification.Ticket.Properties.ExpiresUtc.Value.UtcDateTime
});
// Note: the security token is manually serialized to prevent
// an exception from being thrown if the handler doesn't implement
// the SecurityTokenHandler.WriteToken overload returning a string.
var builder = new StringBuilder();
using (var writer = XmlWriter.Create(builder, new XmlWriterSettings {
Encoding = new UTF8Encoding(false), OmitXmlDeclaration = true
})) {
notification.SecurityTokenHandler.WriteToken(writer, token);
}
return(builder.ToString());
}
}
private async Task <string> SerializeIdentityTokenAsync(
ClaimsPrincipal principal, AuthenticationProperties properties,
OpenIdConnectMessage request, OpenIdConnectMessage response)
{
// properties.IssuedUtc and properties.ExpiresUtc
// should always be preferred when explicitly set.
if (properties.IssuedUtc == null)
{
properties.IssuedUtc = Options.SystemClock.UtcNow;
}
if (properties.ExpiresUtc == null)
{
properties.ExpiresUtc = properties.IssuedUtc + Options.IdentityTokenLifetime;
}
// Replace the principal by a new one containing only the filtered claims.
// Actors identities are also filtered (delegation scenarios).
principal = principal.Clone(claim => {
// Never exclude ClaimTypes.NameIdentifier.
if (string.Equals(claim.Type, ClaimTypes.NameIdentifier, StringComparison.OrdinalIgnoreCase))
{
return(true);
}
// Claims whose destination is not explicitly referenced or doesn't
// contain "id_token" are not included in the identity token.
return(claim.HasDestination(OpenIdConnectConstants.Destinations.IdentityToken));
});
var identity = (ClaimsIdentity)principal.Identity;
// Create a new ticket containing the updated properties and the filtered principal.
var ticket = new AuthenticationTicket(principal, properties, Options.AuthenticationScheme);
ticket.SetUsage(OpenIdConnectConstants.Usages.IdToken);
// By default, add the client_id to the list of the
// presenters allowed to use the identity token.
if (!string.IsNullOrEmpty(request.ClientId))
{
ticket.SetAudiences(request.ClientId);
ticket.SetPresenters(request.ClientId);
}
var notification = new SerializeIdentityTokenContext(Context, Options, request, response, ticket)
{
Issuer = Context.GetIssuer(Options),
SecurityTokenHandler = Options.IdentityTokenHandler,
SigningCredentials = Options.SigningCredentials.FirstOrDefault()
};
await Options.Provider.SerializeIdentityToken(notification);
if (!string.IsNullOrEmpty(notification.IdentityToken))
{
return(notification.IdentityToken);
}
if (notification.SecurityTokenHandler == null)
{
return(null);
}
if (!identity.HasClaim(claim => claim.Type == JwtRegisteredClaimNames.Sub) &&
!identity.HasClaim(claim => claim.Type == ClaimTypes.NameIdentifier))
{
Logger.LogError("A unique identifier cannot be found to generate a 'sub' claim: " +
"make sure to add a 'ClaimTypes.NameIdentifier' claim.");
return(null);
}
// Extract the main identity from the principal.
identity = (ClaimsIdentity)ticket.Principal.Identity;
// Store the unique subject identifier as a claim.
if (!identity.HasClaim(claim => claim.Type == JwtRegisteredClaimNames.Sub))
{
identity.AddClaim(JwtRegisteredClaimNames.Sub, identity.GetClaim(ClaimTypes.NameIdentifier));
}
// Remove the ClaimTypes.NameIdentifier claims to avoid getting duplicate claims.
// Note: the "sub" claim is automatically mapped by JwtSecurityTokenHandler
// to ClaimTypes.NameIdentifier when validating a JWT token.
// Note: make sure to call ToArray() to avoid an InvalidOperationException
// on old versions of Mono, where FindAll() is implemented using an iterator.
foreach (var claim in identity.FindAll(ClaimTypes.NameIdentifier).ToArray())
{
identity.RemoveClaim(claim);
}
// Store the "usage" property as a claim.
identity.AddClaim(OpenIdConnectConstants.Claims.Usage, ticket.GetUsage());
// If the ticket is marked as confidential, add a new
// "confidential" claim in the security token.
if (ticket.IsConfidential())
{
identity.AddClaim(new Claim(OpenIdConnectConstants.Claims.Confidential, "true", ClaimValueTypes.Boolean));
}
// Store the audiences as claims.
foreach (var audience in ticket.GetAudiences())
{
identity.AddClaim(JwtRegisteredClaimNames.Aud, audience);
}
// If a nonce was present in the authorization request, it MUST
// be included in the id_token generated by the token endpoint.
// See http://openid.net/specs/openid-connect-core-1_0.html#IDTokenValidation
var nonce = request.Nonce;
if (request.IsAuthorizationCodeGrantType())
{
// Restore the nonce stored in the authentication
// ticket extracted from the authorization code.
nonce = ticket.GetNonce();
}
if (!string.IsNullOrEmpty(nonce))
{
identity.AddClaim(JwtRegisteredClaimNames.Nonce, nonce);
}
if (!string.IsNullOrEmpty(response.Code))
{
using (var algorithm = OpenIdConnectServerHelpers.GetHashAlgorithm(notification.SigningCredentials.Algorithm)) {
// Create the c_hash using the authorization code returned by SerializeAuthorizationCodeAsync.
var hash = algorithm.ComputeHash(Encoding.ASCII.GetBytes(response.Code));
// Note: only the left-most half of the hash of the octets is used.
// See http://openid.net/specs/openid-connect-core-1_0.html#HybridIDToken
identity.AddClaim(JwtRegisteredClaimNames.CHash, Base64UrlEncoder.Encode(hash, 0, hash.Length / 2));
}
}
if (!string.IsNullOrEmpty(response.AccessToken))
{
using (var algorithm = OpenIdConnectServerHelpers.GetHashAlgorithm(notification.SigningCredentials.Algorithm)) {
// Create the at_hash using the access token returned by SerializeAccessTokenAsync.
var hash = algorithm.ComputeHash(Encoding.ASCII.GetBytes(response.AccessToken));
// Note: only the left-most half of the hash of the octets is used.
// See http://openid.net/specs/openid-connect-core-1_0.html#CodeIDToken
identity.AddClaim(JwtRegisteredClaimNames.AtHash, Base64UrlEncoder.Encode(hash, 0, hash.Length / 2));
}
}
// Extract the presenters from the authentication ticket.
var presenters = ticket.GetPresenters().ToArray();
switch (presenters.Length)
{
case 0: break;
case 1:
identity.AddClaim(JwtRegisteredClaimNames.Azp, presenters[0]);
break;
default:
Logger.LogWarning("Multiple presenters have been associated with the identity token " +
"but the JWT format only accepts single values.");
// Only add the first authorized party.
identity.AddClaim(JwtRegisteredClaimNames.Azp, presenters[0]);
break;
}
var token = notification.SecurityTokenHandler.CreateJwtSecurityToken(
subject: identity,
issuer: notification.Issuer,
signingCredentials: notification.SigningCredentials,
issuedAt: ticket.Properties.IssuedUtc.Value.UtcDateTime,
notBefore: ticket.Properties.IssuedUtc.Value.UtcDateTime,
expires: ticket.Properties.ExpiresUtc.Value.UtcDateTime);
var x509SecurityKey = notification.SigningCredentials?.Key as X509SecurityKey;
if (x509SecurityKey != null)
{
// Note: unlike "kid", "x5t" is not automatically added by JwtHeader's constructor in IdentityModel for .NET Core.
// Though not required by the specifications, this property is needed for IdentityModel for Katana to work correctly.
// See https://github.com/aspnet-contrib/AspNet.Security.OpenIdConnect.Server/issues/132
// and https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/issues/181.
token.Header[JwtHeaderParameterNames.X5t] = Base64UrlEncoder.Encode(x509SecurityKey.Certificate.GetCertHash());
}
return(notification.SecurityTokenHandler.WriteToken(token));
}
private async Task <string> SerializeAccessTokenAsync(
ClaimsIdentity identity, AuthenticationProperties properties,
OpenIdConnectMessage request, OpenIdConnectMessage response)
{
// properties.IssuedUtc and properties.ExpiresUtc
// should always be preferred when explicitly set.
if (properties.IssuedUtc == null)
{
properties.IssuedUtc = Options.SystemClock.UtcNow;
}
if (properties.ExpiresUtc == null)
{
properties.ExpiresUtc = properties.IssuedUtc + Options.AccessTokenLifetime;
}
// Create a new identity containing only the filtered claims.
// Actors identities are also filtered (delegation scenarios).
identity = identity.Clone(claim => {
// Never exclude ClaimTypes.NameIdentifier.
if (string.Equals(claim.Type, ClaimTypes.NameIdentifier, StringComparison.OrdinalIgnoreCase))
{
return(true);
}
// Claims whose destination is not explicitly referenced or doesn't
// contain "access_token" are not included in the access token.
return(claim.HasDestination(OpenIdConnectConstants.Destinations.AccessToken));
});
// Create a new ticket containing the updated properties and the filtered identity.
var ticket = new AuthenticationTicket(identity, properties);
ticket.SetUsage(OpenIdConnectConstants.Usages.AccessToken);
ticket.SetAudiences(ticket.GetResources());
// Associate a random identifier with the access token.
ticket.SetTicketId(Guid.NewGuid().ToString());
// By default, add the client_id to the list of the
// presenters allowed to use the access token.
if (!string.IsNullOrEmpty(request.ClientId))
{
ticket.SetPresenters(request.ClientId);
}
var notification = new SerializeAccessTokenContext(Context, Options, request, response, ticket)
{
DataFormat = Options.AccessTokenFormat,
Issuer = Context.GetIssuer(Options),
SecurityTokenHandler = Options.AccessTokenHandler,
SigningCredentials = Options.SigningCredentials.FirstOrDefault()
};
await Options.Provider.SerializeAccessToken(notification);
if (!string.IsNullOrEmpty(notification.AccessToken))
{
return(notification.AccessToken);
}
if (notification.SecurityTokenHandler == null)
{
return(notification.DataFormat?.Protect(ticket));
}
// Store the "unique_id" property as a claim.
ticket.Identity.AddClaim(notification.SecurityTokenHandler is JwtSecurityTokenHandler ?
OpenIdConnectConstants.Claims.JwtId :
OpenIdConnectConstants.Claims.TokenId, ticket.GetTicketId());
// Store the "usage" property as a claim.
ticket.Identity.AddClaim(OpenIdConnectConstants.Claims.Usage, ticket.GetUsage());
// If the ticket is marked as confidential, add a new
// "confidential" claim in the security token.
if (ticket.IsConfidential())
{
ticket.Identity.AddClaim(new Claim(OpenIdConnectConstants.Claims.Confidential, "true", ClaimValueTypes.Boolean));
}
// Create a new claim per scope item, that will result
// in a "scope" array being added in the access token.
foreach (var scope in ticket.GetScopes())
{
ticket.Identity.AddClaim(OpenIdConnectConstants.Claims.Scope, scope);
}
var handler = notification.SecurityTokenHandler as JwtSecurityTokenHandler;
if (handler != null)
{
// Note: when used as an access token, a JWT token doesn't have to expose a "sub" claim
// but the name identifier claim is used as a substitute when it has been explicitly added.
// See https://tools.ietf.org/html/rfc7519#section-4.1.2
var subject = identity.FindFirst(OpenIdConnectConstants.Claims.Subject);
if (subject == null)
{
var identifier = identity.FindFirst(ClaimTypes.NameIdentifier);
if (identifier != null)
{
identity.AddClaim(OpenIdConnectConstants.Claims.Subject, identifier.Value);
}
}
// Remove the ClaimTypes.NameIdentifier claims to avoid getting duplicate claims.
// Note: the "sub" claim is automatically mapped by JwtSecurityTokenHandler
// to ClaimTypes.NameIdentifier when validating a JWT token.
// Note: make sure to call ToArray() to avoid an InvalidOperationException
// on old versions of Mono, where FindAll() is implemented using an iterator.
foreach (var claim in ticket.Identity.FindAll(ClaimTypes.NameIdentifier).ToArray())
{
ticket.Identity.RemoveClaim(claim);
}
// Store the audiences as claims.
foreach (var audience in ticket.GetAudiences())
{
ticket.Identity.AddClaim(OpenIdConnectConstants.Claims.Audience, audience);
}
// Extract the presenters from the authentication ticket.
var presenters = ticket.GetPresenters().ToArray();
switch (presenters.Length)
{
case 0: break;
case 1:
identity.AddClaim(OpenIdConnectConstants.Claims.AuthorizedParty, presenters[0]);
break;
default:
Options.Logger.LogWarning("Multiple presenters have been associated with the access token " +
"but the JWT format only accepts single values.");
// Only add the first authorized party.
identity.AddClaim(OpenIdConnectConstants.Claims.AuthorizedParty, presenters[0]);
break;
}
var token = handler.CreateToken(
subject: ticket.Identity,
issuer: notification.Issuer,
signingCredentials: notification.SigningCredentials,
notBefore: ticket.Properties.IssuedUtc.Value.UtcDateTime,
expires: ticket.Properties.ExpiresUtc.Value.UtcDateTime);
token.Payload[OpenIdConnectConstants.Claims.IssuedAt] =
EpochTime.GetIntDate(ticket.Properties.IssuedUtc.Value.UtcDateTime);
// Try to extract a key identifier from the signing credentials
// and add the "kid" property to the JWT header if applicable.
LocalIdKeyIdentifierClause clause = null;
if (notification.SigningCredentials?.SigningKeyIdentifier != null &&
notification.SigningCredentials.SigningKeyIdentifier.TryFind(out clause))
{
token.Header[JwtHeaderParameterNames.Kid] = clause.LocalId;
}
return(handler.WriteToken(token));
}
else
{
var descriptor = new SecurityTokenDescriptor {
Subject = ticket.Identity,
AppliesToAddress = notification.Audiences.ElementAtOrDefault(0),
TokenIssuerName = notification.Issuer,
EncryptingCredentials = notification.EncryptingCredentials,
SigningCredentials = notification.SigningCredentials,
Lifetime = new Lifetime(
notification.Ticket.Properties.IssuedUtc.Value.UtcDateTime,
notification.Ticket.Properties.ExpiresUtc.Value.UtcDateTime)
};
// When the encrypting credentials use an asymmetric key, replace them by a
// EncryptedKeyEncryptingCredentials instance to generate a symmetric key.
if (descriptor.EncryptingCredentials != null &&
descriptor.EncryptingCredentials.SecurityKey is AsymmetricSecurityKey)
{
// Note: EncryptedKeyEncryptingCredentials automatically generates an in-memory key
// that will be encrypted using the original credentials and added to the resulting token
// if the security token handler fully supports token encryption (e.g SAML or SAML2).
descriptor.EncryptingCredentials = new EncryptedKeyEncryptingCredentials(
wrappingCredentials: notification.EncryptingCredentials, keySizeInBits: 256,
encryptionAlgorithm: SecurityAlgorithms.Aes256Encryption);
}
var token = notification.SecurityTokenHandler.CreateToken(descriptor);
// Note: the security token is manually serialized to prevent
// an exception from being thrown if the handler doesn't implement
// the SecurityTokenHandler.WriteToken overload returning a string.
var builder = new StringBuilder();
using (var writer = XmlWriter.Create(builder, new XmlWriterSettings {
Encoding = new UTF8Encoding(false), OmitXmlDeclaration = true
})) {
notification.SecurityTokenHandler.WriteToken(writer, token);
}
return(builder.ToString());
}
}
private async Task <string> SerializeIdentityTokenAsync(
ClaimsIdentity identity, AuthenticationProperties properties,
OpenIdConnectMessage request, OpenIdConnectMessage response)
{
// properties.IssuedUtc and properties.ExpiresUtc
// should always be preferred when explicitly set.
if (properties.IssuedUtc == null)
{
properties.IssuedUtc = Options.SystemClock.UtcNow;
}
if (properties.ExpiresUtc == null)
{
properties.ExpiresUtc = properties.IssuedUtc + Options.IdentityTokenLifetime;
}
// Replace the identity by a new one containing only the filtered claims.
// Actors identities are also filtered (delegation scenarios).
identity = identity.Clone(claim => {
// Never exclude ClaimTypes.NameIdentifier.
if (string.Equals(claim.Type, ClaimTypes.NameIdentifier, StringComparison.OrdinalIgnoreCase))
{
return(true);
}
// Claims whose destination is not explicitly referenced or doesn't
// contain "id_token" are not included in the identity token.
return(claim.HasDestination(OpenIdConnectConstants.Destinations.IdentityToken));
});
// Create a new ticket containing the updated properties and the filtered identity.
var ticket = new AuthenticationTicket(identity, properties);
ticket.SetUsage(OpenIdConnectConstants.Usages.IdToken);
// Associate a random identifier with the identity token.
ticket.SetTicketId(Guid.NewGuid().ToString());
// By default, add the client_id to the list of the
// presenters allowed to use the identity token.
if (!string.IsNullOrEmpty(request.ClientId))
{
ticket.SetAudiences(request.ClientId);
ticket.SetPresenters(request.ClientId);
}
var notification = new SerializeIdentityTokenContext(Context, Options, request, response, ticket)
{
Issuer = Context.GetIssuer(Options),
SecurityTokenHandler = Options.IdentityTokenHandler,
SigningCredentials = Options.SigningCredentials.FirstOrDefault()
};
await Options.Provider.SerializeIdentityToken(notification);
if (!string.IsNullOrEmpty(notification.IdentityToken))
{
return(notification.IdentityToken);
}
if (notification.SecurityTokenHandler == null)
{
return(null);
}
if (!identity.HasClaim(claim => claim.Type == OpenIdConnectConstants.Claims.Subject) &&
!identity.HasClaim(claim => claim.Type == ClaimTypes.NameIdentifier))
{
throw new InvalidOperationException("A unique identifier cannot be found to generate a 'sub' claim: " +
"make sure to add a 'ClaimTypes.NameIdentifier' claim.");
}
// Store the unique subject identifier as a claim.
if (!identity.HasClaim(claim => claim.Type == OpenIdConnectConstants.Claims.Subject))
{
identity.AddClaim(OpenIdConnectConstants.Claims.Subject, identity.GetClaim(ClaimTypes.NameIdentifier));
}
// Remove the ClaimTypes.NameIdentifier claims to avoid getting duplicate claims.
// Note: the "sub" claim is automatically mapped by JwtSecurityTokenHandler
// to ClaimTypes.NameIdentifier when validating a JWT token.
// Note: make sure to call ToArray() to avoid an InvalidOperationException
// on old versions of Mono, where FindAll() is implemented using an iterator.
foreach (var claim in identity.FindAll(ClaimTypes.NameIdentifier).ToArray())
{
identity.RemoveClaim(claim);
}
// Store the "unique_id" property as a claim.
ticket.Identity.AddClaim(OpenIdConnectConstants.Claims.JwtId, ticket.GetTicketId());
// Store the "usage" property as a claim.
ticket.Identity.AddClaim(OpenIdConnectConstants.Claims.Usage, ticket.GetUsage());
// If the ticket is marked as confidential, add a new
// "confidential" claim in the security token.
if (ticket.IsConfidential())
{
ticket.Identity.AddClaim(new Claim(OpenIdConnectConstants.Claims.Confidential, "true", ClaimValueTypes.Boolean));
}
// Store the audiences as claims.
foreach (var audience in ticket.GetAudiences())
{
ticket.Identity.AddClaim(OpenIdConnectConstants.Claims.Audience, audience);
}
// If a nonce was present in the authorization request, it MUST
// be included in the id_token generated by the token endpoint.
// See http://openid.net/specs/openid-connect-core-1_0.html#IDTokenValidation
var nonce = request.Nonce;
if (request.IsAuthorizationCodeGrantType())
{
// Restore the nonce stored in the authentication
// ticket extracted from the authorization code.
nonce = ticket.GetNonce();
}
if (!string.IsNullOrEmpty(nonce))
{
ticket.Identity.AddClaim(OpenIdConnectConstants.Claims.Nonce, nonce);
}
if (!string.IsNullOrEmpty(response.Code))
{
using (var algorithm = HashAlgorithm.Create(notification.SigningCredentials.DigestAlgorithm)) {
// Create the c_hash using the authorization code returned by SerializeAuthorizationCodeAsync.
var hash = algorithm.ComputeHash(Encoding.ASCII.GetBytes(response.Code));
// Note: only the left-most half of the hash of the octets is used.
// See http://openid.net/specs/openid-connect-core-1_0.html#HybridIDToken
ticket.Identity.AddClaim(OpenIdConnectConstants.Claims.CodeHash,
Base64UrlEncoder.Encode(hash, 0, hash.Length / 2));
}
}
if (!string.IsNullOrEmpty(response.AccessToken))
{
using (var algorithm = HashAlgorithm.Create(notification.SigningCredentials.DigestAlgorithm)) {
// Create the at_hash using the access token returned by SerializeAccessTokenAsync.
var hash = algorithm.ComputeHash(Encoding.ASCII.GetBytes(response.AccessToken));
// Note: only the left-most half of the hash of the octets is used.
// See http://openid.net/specs/openid-connect-core-1_0.html#CodeIDToken
ticket.Identity.AddClaim(OpenIdConnectConstants.Claims.AccessTokenHash,
Base64UrlEncoder.Encode(hash, 0, hash.Length / 2));
}
}
// Extract the presenters from the authentication ticket.
var presenters = ticket.GetPresenters().ToArray();
switch (presenters.Length)
{
case 0: break;
case 1:
identity.AddClaim(OpenIdConnectConstants.Claims.AuthorizedParty, presenters[0]);
break;
default:
Options.Logger.LogWarning("Multiple presenters have been associated with the identity token " +
"but the JWT format only accepts single values.");
// Only add the first authorized party.
identity.AddClaim(OpenIdConnectConstants.Claims.AuthorizedParty, presenters[0]);
break;
}
var token = notification.SecurityTokenHandler.CreateToken(
subject: ticket.Identity,
issuer: notification.Issuer,
signingCredentials: notification.SigningCredentials,
notBefore: ticket.Properties.IssuedUtc.Value.UtcDateTime,
expires: ticket.Properties.ExpiresUtc.Value.UtcDateTime);
token.Payload[OpenIdConnectConstants.Claims.IssuedAt] =
EpochTime.GetIntDate(ticket.Properties.IssuedUtc.Value.UtcDateTime);
// Try to extract a key identifier from the signing credentials
// and add the "kid" property to the JWT header if applicable.
LocalIdKeyIdentifierClause clause = null;
if (notification.SigningCredentials?.SigningKeyIdentifier != null &&
notification.SigningCredentials.SigningKeyIdentifier.TryFind(out clause))
{
token.Header[JwtHeaderParameterNames.Kid] = clause.LocalId;
}
return(notification.SecurityTokenHandler.WriteToken(token));
}
private async Task InvokeValidationEndpointAsync()
{
OpenIdConnectMessage request;
// See https://tools.ietf.org/html/rfc7662#section-2.1
// and https://tools.ietf.org/html/rfc7662#section-4
if (string.Equals(Request.Method, "GET", StringComparison.OrdinalIgnoreCase))
{
request = new OpenIdConnectMessage(Request.Query.ToDictionary())
{
RequestType = OpenIdConnectRequestType.AuthenticationRequest
};
}
else if (string.Equals(Request.Method, "POST", StringComparison.OrdinalIgnoreCase))
{
// See http://openid.net/specs/openid-connect-core-1_0.html#FormSerialization
if (string.IsNullOrEmpty(Request.ContentType))
{
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "A malformed validation request has been received: " +
"the mandatory 'Content-Type' header was missing from the POST request."
});
return;
}
// May have media/type; charset=utf-8, allow partial match.
if (!Request.ContentType.StartsWith("application/x-www-form-urlencoded", StringComparison.OrdinalIgnoreCase))
{
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "A malformed validation request has been received: " +
"the 'Content-Type' header contained an unexcepted value. " +
"Make sure to use 'application/x-www-form-urlencoded'."
});
return;
}
var form = await Request.ReadFormAsync(Context.RequestAborted);
request = new OpenIdConnectMessage(form.ToDictionary())
{
RequestType = OpenIdConnectRequestType.AuthenticationRequest
};
}
else
{
Logger.LogInformation("A malformed request has been received by the validation endpoint.");
await SendErrorPageAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "A malformed validation request has been received: " +
"make sure to use either GET or POST."
});
return;
}
if (string.IsNullOrWhiteSpace(request.GetToken()))
{
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "A malformed validation request has been received: " +
"a 'token' parameter with an access, refresh, or identity token is required."
});
return;
}
// When client_id and client_secret are both null, try to extract them from the Authorization header.
// See http://tools.ietf.org/html/rfc6749#section-2.3.1 and
// http://openid.net/specs/openid-connect-core-1_0.html#ClientAuthentication
if (string.IsNullOrEmpty(request.ClientId) && string.IsNullOrEmpty(request.ClientSecret))
{
string header = Request.Headers[HeaderNames.Authorization];
if (!string.IsNullOrEmpty(header) && header.StartsWith("Basic ", StringComparison.OrdinalIgnoreCase))
{
try {
var value = header.Substring("Basic ".Length).Trim();
var data = Encoding.UTF8.GetString(Convert.FromBase64String(value));
var index = data.IndexOf(':');
if (index >= 0)
{
request.ClientId = data.Substring(0, index);
request.ClientSecret = data.Substring(index + 1);
}
}
catch (FormatException) { }
catch (ArgumentException) { }
}
}
var clientNotification = new ValidateClientAuthenticationContext(Context, Options, request);
await Options.Provider.ValidateClientAuthentication(clientNotification);
// Reject the request if client authentication was rejected.
if (clientNotification.IsRejected)
{
Logger.LogError("The validation request was rejected " +
"because client authentication was invalid.");
await SendPayloadAsync(new JObject {
[OpenIdConnectConstants.Claims.Active] = false
});
return;
}
// Ensure that the client_id has been set from the ValidateClientAuthentication event.
else if (clientNotification.IsValidated && string.IsNullOrEmpty(request.ClientId))
{
Logger.LogError("Client authentication was validated but the client_id was not set.");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.ServerError,
ErrorDescription = "An internal server error occurred."
});
return;
}
AuthenticationTicket ticket = null;
// Note: use the "token_type_hint" parameter to determine
// the type of the token sent by the client application.
// See https://tools.ietf.org/html/rfc7662#section-2.1
switch (request.GetTokenTypeHint())
{
case OpenIdConnectConstants.Usages.AccessToken:
ticket = await DeserializeAccessTokenAsync(request.GetToken(), request);
break;
case OpenIdConnectConstants.Usages.RefreshToken:
ticket = await DeserializeRefreshTokenAsync(request.GetToken(), request);
break;
case OpenIdConnectConstants.Usages.IdToken:
ticket = await DeserializeIdentityTokenAsync(request.GetToken(), request);
break;
}
// Note: if the token can't be found using "token_type_hint",
// the search must be extended to all supported token types.
// See https://tools.ietf.org/html/rfc7662#section-2.1
if (ticket == null)
{
ticket = await DeserializeAccessTokenAsync(request.GetToken(), request) ??
await DeserializeIdentityTokenAsync(request.GetToken(), request) ??
await DeserializeRefreshTokenAsync(request.GetToken(), request);
}
if (ticket == null)
{
Logger.LogInformation("The validation request was rejected because the token was invalid.");
await SendPayloadAsync(new JObject {
[OpenIdConnectConstants.Claims.Active] = false
});
return;
}
// Note: unlike refresh or identity tokens that can only be validated by client applications,
// access tokens can be validated by either resource servers or client applications:
// in both cases, the caller must be authenticated if the ticket is marked as confidential.
if (clientNotification.IsSkipped && ticket.IsConfidential())
{
Logger.LogWarning("The validation request was rejected " +
"because the caller was not authenticated.");
await SendPayloadAsync(new JObject {
[OpenIdConnectConstants.Claims.Active] = false
});
return;
}
// If the ticket is already expired, directly return active=false.
if (ticket.Properties.ExpiresUtc.HasValue &&
ticket.Properties.ExpiresUtc < Options.SystemClock.UtcNow)
{
Logger.LogDebug("expired token");
await SendPayloadAsync(new JObject {
[OpenIdConnectConstants.Claims.Active] = false
});
return;
}
switch (ticket.GetUsage())
{
case OpenIdConnectConstants.Usages.AccessToken: {
// When the caller is authenticated, ensure it is
// listed as a valid audience or authorized presenter.
if (clientNotification.IsValidated && !ticket.HasAudience(clientNotification.ClientId) &&
!ticket.HasPresenter(clientNotification.ClientId))
{
Logger.LogWarning("The validation request was rejected because the access token " +
"was issued to a different client or for another resource server.");
await SendPayloadAsync(new JObject {
[OpenIdConnectConstants.Claims.Active] = false
});
return;
}
break;
}
case OpenIdConnectConstants.Usages.IdToken: {
// When the caller is authenticated, reject the validation
// request if the caller is not listed as a valid audience.
if (clientNotification.IsValidated && !ticket.HasAudience(clientNotification.ClientId))
{
Logger.LogWarning("The validation request was rejected because the " +
"identity token was issued to a different client.");
await SendPayloadAsync(new JObject {
[OpenIdConnectConstants.Claims.Active] = false
});
return;
}
break;
}
case OpenIdConnectConstants.Usages.RefreshToken: {
// When the caller is authenticated, reject the validation request if the caller
// doesn't correspond to the client application the token was issued to.
if (clientNotification.IsValidated && !ticket.HasPresenter(clientNotification.ClientId))
{
Logger.LogWarning("The validation request was rejected because the " +
"refresh token was issued to a different client.");
await SendPayloadAsync(new JObject {
[OpenIdConnectConstants.Claims.Active] = false
});
return;
}
break;
}
}
// Insert the validation request in the ASP.NET context.
Context.SetOpenIdConnectRequest(request);
var notification = new ValidationEndpointContext(Context, Options, request, ticket);
notification.Active = true;
// Note: "token_type" may be null when the received token is not an access token.
// See https://tools.ietf.org/html/rfc7662#section-2.2 and https://tools.ietf.org/html/rfc6749#section-5.1
notification.TokenType = ticket.Principal.GetClaim(OpenIdConnectConstants.Claims.TokenType);
notification.Issuer = Context.GetIssuer(Options);
notification.Subject = ticket.Principal.GetClaim(ClaimTypes.NameIdentifier);
notification.IssuedAt = ticket.Properties.IssuedUtc;
notification.ExpiresAt = ticket.Properties.ExpiresUtc;
// Copy the audiences extracted from the "aud" claim.
foreach (var audience in ticket.GetAudiences())
{
notification.Audiences.Add(audience);
}
// Note: non-metadata claims are only added if the caller is authenticated AND is in the specified audiences.
if (clientNotification.IsValidated && notification.Audiences.Contains(clientNotification.ClientId))
{
// Extract the main identity associated with the principal.
var identity = (ClaimsIdentity)ticket.Principal.Identity;
notification.Username = identity.Name;
notification.Scope = ticket.GetProperty(OpenIdConnectConstants.Properties.Scopes);
// Potentially sensitive claims are only exposed to trusted callers
// if the ticket corresponds to an access or identity token.
if (ticket.IsAccessToken() || ticket.IsIdentityToken())
{
foreach (var claim in ticket.Principal.Claims)
{
// Exclude standard claims, that are already handled via strongly-typed properties.
// Make sure to always update this list when adding new built-in claim properties.
if (string.Equals(claim.Type, identity.NameClaimType, StringComparison.Ordinal) ||
string.Equals(claim.Type, ClaimTypes.NameIdentifier, StringComparison.Ordinal))
{
continue;
}
if (string.Equals(claim.Type, JwtRegisteredClaimNames.Aud, StringComparison.Ordinal) ||
string.Equals(claim.Type, JwtRegisteredClaimNames.Exp, StringComparison.Ordinal) ||
string.Equals(claim.Type, JwtRegisteredClaimNames.Iat, StringComparison.Ordinal) ||
string.Equals(claim.Type, JwtRegisteredClaimNames.Iss, StringComparison.Ordinal) ||
string.Equals(claim.Type, JwtRegisteredClaimNames.Nbf, StringComparison.Ordinal) ||
string.Equals(claim.Type, JwtRegisteredClaimNames.Sub, StringComparison.Ordinal))
{
continue;
}
if (string.Equals(claim.Type, OpenIdConnectConstants.Claims.TokenType, StringComparison.Ordinal) ||
string.Equals(claim.Type, OpenIdConnectConstants.Claims.Scope, StringComparison.Ordinal))
{
continue;
}
string type;
// Try to resolve the short name associated with the claim type:
// if none can be found, the claim type is used as-is.
if (!JwtSecurityTokenHandler.DefaultOutboundClaimTypeMap.TryGetValue(claim.Type, out type))
{
type = claim.Type;
}
// Note: make sure to use the indexer
// syntax to avoid duplicate properties.
notification.Claims[type] = claim.Value;
}
}
}
await Options.Provider.ValidationEndpoint(notification);
// Flow the changes made to the authentication ticket.
ticket = notification.AuthenticationTicket;
if (notification.HandledResponse)
{
return;
}
var payload = new JObject();
payload.Add(OpenIdConnectConstants.Claims.Active, notification.Active);
// Only add the other properties if
// the token is considered as active.
if (notification.Active)
{
if (!string.IsNullOrEmpty(notification.Issuer))
{
payload.Add(JwtRegisteredClaimNames.Iss, notification.Issuer);
}
if (!string.IsNullOrEmpty(notification.Username))
{
payload.Add(OpenIdConnectConstants.Claims.Username, notification.Username);
}
if (!string.IsNullOrEmpty(notification.Subject))
{
payload.Add(JwtRegisteredClaimNames.Sub, notification.Subject);
}
if (!string.IsNullOrEmpty(notification.Scope))
{
payload.Add(OpenIdConnectConstants.Claims.Scope, notification.Scope);
}
if (notification.IssuedAt.HasValue)
{
payload.Add(JwtRegisteredClaimNames.Iat, EpochTime.GetIntDate(notification.IssuedAt.Value.UtcDateTime));
payload.Add(JwtRegisteredClaimNames.Nbf, EpochTime.GetIntDate(notification.IssuedAt.Value.UtcDateTime));
}
if (notification.ExpiresAt.HasValue)
{
payload.Add(JwtRegisteredClaimNames.Exp, EpochTime.GetIntDate(notification.ExpiresAt.Value.UtcDateTime));
}
if (!string.IsNullOrEmpty(notification.TokenType))
{
payload.Add(OpenIdConnectConstants.Claims.TokenType, notification.TokenType);
}
switch (notification.Audiences.Count)
{
case 0: break;
case 1:
payload.Add(JwtRegisteredClaimNames.Aud, notification.Audiences[0]);
break;
default:
payload.Add(JwtRegisteredClaimNames.Aud, JArray.FromObject(notification.Audiences));
break;
}
foreach (var claim in notification.Claims)
{
// Ignore claims whose value is null.
if (claim.Value == null)
{
continue;
}
// Note: make sure to use the indexer
// syntax to avoid duplicate properties.
payload[claim.Key] = claim.Value;
}
}
var context = new ValidationEndpointResponseContext(Context, Options, payload);
await Options.Provider.ValidationEndpointResponse(context);
if (context.HandledResponse)
{
return;
}
using (var buffer = new MemoryStream())
using (var writer = new JsonTextWriter(new StreamWriter(buffer))) {
payload.WriteTo(writer);
writer.Flush();
Response.ContentLength = buffer.Length;
Response.ContentType = "application/json;charset=UTF-8";
Response.Headers[HeaderNames.CacheControl] = "no-cache";
Response.Headers[HeaderNames.Pragma] = "no-cache";
Response.Headers[HeaderNames.Expires] = "-1";
buffer.Seek(offset: 0, loc: SeekOrigin.Begin);
await buffer.CopyToAsync(Response.Body, 4096, Context.RequestAborted);
}
}
private async Task <bool> InvokeTokenEndpointAsync()
{
if (!HttpMethods.IsPost(Request.Method))
{
Logger.LogError("The token request was rejected because an invalid " +
"HTTP method was specified: {Method}.", Request.Method);
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The specified HTTP method is not valid."
}));
}
// See http://openid.net/specs/openid-connect-core-1_0.html#FormSerialization
if (string.IsNullOrEmpty(Request.ContentType))
{
Logger.LogError("The token request was rejected because the " +
"mandatory 'Content-Type' header was missing.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'Content-Type' header must be specified."
}));
}
// May have media/type; charset=utf-8, allow partial match.
if (!Request.ContentType.StartsWith("application/x-www-form-urlencoded", StringComparison.OrdinalIgnoreCase))
{
Logger.LogError("The token request was rejected because an invalid 'Content-Type' " +
"header was specified: {ContentType}.", Request.ContentType);
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The specified 'Content-Type' header is not valid."
}));
}
var request = new OpenIdConnectRequest(await Request.ReadFormAsync(Context.RequestAborted));
// Note: set the message type before invoking the ExtractTokenRequest event.
request.SetProperty(OpenIdConnectConstants.Properties.MessageType,
OpenIdConnectConstants.MessageTypes.TokenRequest);
// Store the token request in the ASP.NET context.
Context.SetOpenIdConnectRequest(request);
var @event = new ExtractTokenRequestContext(Context, Scheme, Options, request);
await Provider.ExtractTokenRequest(@event);
if (@event.Result != null)
{
if (@event.Result.Handled)
{
Logger.LogDebug("The token request was handled in user code.");
return(true);
}
else if (@event.Result.Skipped)
{
Logger.LogDebug("The default token request handling was skipped from user code.");
return(false);
}
}
else if (@event.IsRejected)
{
Logger.LogError("The token request was rejected with the following error: {Error} ; {Description}",
/* Error: */ @event.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
/* Description: */ @event.ErrorDescription);
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = @event.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = @event.ErrorDescription,
ErrorUri = @event.ErrorUri
}));
}
Logger.LogInformation("The token request was successfully extracted " +
"from the HTTP request: {Request}.", request);
// Reject token requests missing the mandatory grant_type parameter.
if (string.IsNullOrEmpty(request.GrantType))
{
Logger.LogError("The token request was rejected because the grant type was missing.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'grant_type' parameter is missing.",
}));
}
// Reject grant_type=authorization_code requests if the authorization endpoint is disabled.
else if (request.IsAuthorizationCodeGrantType() && !Options.AuthorizationEndpointPath.HasValue)
{
Logger.LogError("The token request was rejected because the authorization code grant was disabled.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.UnsupportedGrantType,
ErrorDescription = "The authorization code grant is not allowed by this authorization server."
}));
}
// Reject grant_type=authorization_code requests missing the authorization code.
// See https://tools.ietf.org/html/rfc6749#section-4.1.3
else if (request.IsAuthorizationCodeGrantType() && string.IsNullOrEmpty(request.Code))
{
Logger.LogError("The token request was rejected because the authorization code was missing.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'code' parameter is missing."
}));
}
// Reject grant_type=refresh_token requests missing the refresh token.
// See https://tools.ietf.org/html/rfc6749#section-6
else if (request.IsRefreshTokenGrantType() && string.IsNullOrEmpty(request.RefreshToken))
{
Logger.LogError("The token request was rejected because the refresh token was missing.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'refresh_token' parameter is missing."
}));
}
// Reject grant_type=password requests missing username or password.
// See https://tools.ietf.org/html/rfc6749#section-4.3.2
else if (request.IsPasswordGrantType() && (string.IsNullOrEmpty(request.Username) ||
string.IsNullOrEmpty(request.Password)))
{
Logger.LogError("The token request was rejected because the resource owner credentials were missing.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'username' and/or 'password' parameters are missing."
}));
}
// Try to resolve the client credentials specified in the 'Authorization' header.
// If they cannot be extracted, fallback to the client_id/client_secret parameters.
var credentials = Request.Headers.GetClientCredentials();
if (credentials != null)
{
// Reject requests that use multiple client authentication methods.
// See https://tools.ietf.org/html/rfc6749#section-2.3 for more information.
if (!string.IsNullOrEmpty(request.ClientSecret))
{
Logger.LogError("The token request was rejected because multiple client credentials were specified.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "Multiple client credentials cannot be specified."
}));
}
request.ClientId = credentials?.Key;
request.ClientSecret = credentials?.Value;
}
var context = new ValidateTokenRequestContext(Context, Scheme, Options, request);
await Provider.ValidateTokenRequest(context);
// If the validation context was set as fully validated,
// mark the OpenID Connect request as confidential.
if (context.IsValidated)
{
request.SetProperty(OpenIdConnectConstants.Properties.ConfidentialityLevel,
OpenIdConnectConstants.ConfidentialityLevels.Private);
}
if (context.Result != null)
{
if (context.Result.Handled)
{
Logger.LogDebug("The token request was handled in user code.");
return(true);
}
else if (context.Result.Skipped)
{
Logger.LogDebug("The default token request handling was skipped from user code.");
return(false);
}
}
else if (context.IsRejected)
{
Logger.LogError("The token request was rejected with the following error: {Error} ; {Description}",
/* Error: */ context.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
/* Description: */ context.ErrorDescription);
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = context.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = context.ErrorDescription,
ErrorUri = context.ErrorUri
}));
}
// Reject grant_type=client_credentials requests if validation was skipped.
else if (context.IsSkipped && request.IsClientCredentialsGrantType())
{
Logger.LogError("The token request must be fully validated to use the client_credentials grant type.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Client authentication is required when using the client credentials grant."
}));
}
// At this stage, client_id cannot be null for grant_type=authorization_code requests,
// as it must either be set in the ValidateTokenRequest notification
// by the developer or manually flowed by non-confidential client applications.
// See https://tools.ietf.org/html/rfc6749#section-4.1.3
if (request.IsAuthorizationCodeGrantType() && string.IsNullOrEmpty(context.ClientId))
{
Logger.LogError("The token request was rejected because the mandatory 'client_id' was missing.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'client_id' parameter is missing."
}));
}
// Store the validated client_id as a request property.
request.SetProperty(OpenIdConnectConstants.Properties.ValidatedClientId, context.ClientId);
Logger.LogInformation("The token request was successfully validated.");
AuthenticationTicket ticket = null;
// See http://tools.ietf.org/html/rfc6749#section-4.1
// and http://tools.ietf.org/html/rfc6749#section-4.1.3 (authorization code grant).
// See http://tools.ietf.org/html/rfc6749#section-6 (refresh token grant).
if (request.IsAuthorizationCodeGrantType() || request.IsRefreshTokenGrantType())
{
ticket = request.IsAuthorizationCodeGrantType() ?
await DeserializeAuthorizationCodeAsync(request.Code, request) :
await DeserializeRefreshTokenAsync(request.RefreshToken, request);
if (ticket == null)
{
Logger.LogError("The token request was rejected because the " +
"authorization code or the refresh token was invalid.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = request.IsAuthorizationCodeGrantType() ?
"The specified authorization code is invalid." :
"The specified refresh token is invalid."
}));
}
// If the client was fully authenticated when retrieving its refresh token,
// the current request must be rejected if client authentication was not enforced.
if (request.IsRefreshTokenGrantType() && !context.IsValidated && ticket.IsConfidential())
{
Logger.LogError("The token request was rejected because client authentication " +
"was required to use the confidential refresh token.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Client authentication is required to use the specified refresh token."
}));
}
if (ticket.Properties.ExpiresUtc.HasValue &&
ticket.Properties.ExpiresUtc < Options.SystemClock.UtcNow)
{
Logger.LogError("The token request was rejected because the " +
"authorization code or the refresh token was expired.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = request.IsAuthorizationCodeGrantType() ?
"The specified authorization code is no longer valid." :
"The specified refresh token is no longer valid."
}));
}
// Note: presenters may be empty during a grant_type=refresh_token request if the refresh token
// was issued to a public client but cannot be null for an authorization code grant request.
var presenters = ticket.GetPresenters();
if (request.IsAuthorizationCodeGrantType() && !presenters.Any())
{
throw new InvalidOperationException("The presenters list cannot be extracted from the authorization code.");
}
// Ensure the authorization code/refresh token was issued to the client application making the token request.
// Note: when using the refresh token grant, client_id is optional but must validated if present.
// As a consequence, this check doesn't depend on the actual status of client authentication.
// See https://tools.ietf.org/html/rfc6749#section-6
// and http://openid.net/specs/openid-connect-core-1_0.html#RefreshingAccessToken
//if (!string.IsNullOrEmpty(context.ClientId) && presenters.Any() &&
// !presenters.Contains(context.ClientId, StringComparer.Ordinal))
//{
// Logger.LogError("The token request was rejected because the authorization " +
// "code was issued to a different client application.");
// return await SendTokenResponseAsync(new OpenIdConnectResponse
// {
// Error = OpenIdConnectConstants.Errors.InvalidGrant,
// ErrorDescription = request.IsAuthorizationCodeGrantType() ?
// "The specified authorization code cannot be used by this client application." :
// "The specified refresh token cannot be used by this client application."
// });
//}
// Validate the redirect_uri flowed by the client application during this token request.
// Note: for pure OAuth2 requests, redirect_uri is only mandatory if the authorization request
// contained an explicit redirect_uri. OpenID Connect requests MUST include a redirect_uri
// but the specifications allow proceeding the token request without returning an error
// if the authorization request didn't contain an explicit redirect_uri.
// See https://tools.ietf.org/html/rfc6749#section-4.1.3
// and http://openid.net/specs/openid-connect-core-1_0.html#TokenRequestValidation
var address = ticket.GetProperty(OpenIdConnectConstants.Properties.OriginalRedirectUri);
if (request.IsAuthorizationCodeGrantType() && !string.IsNullOrEmpty(address))
{
if (string.IsNullOrEmpty(request.RedirectUri))
{
Logger.LogError("The token request was rejected because the mandatory 'redirect_uri' " +
"parameter was missing from the grant_type=authorization_code request.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'redirect_uri' parameter is missing."
}));
}
else if (!string.Equals(address, request.RedirectUri, StringComparison.Ordinal))
{
Logger.LogError("The token request was rejected because the 'redirect_uri' " +
"parameter didn't correspond to the expected value.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "The specified 'redirect_uri' parameter doesn't match the client " +
"redirection endpoint the authorization code was initially sent to."
}));
}
}
// If a code challenge was initially sent in the authorization request and associated with the
// code, validate the code verifier to ensure the token request is sent by a legit caller.
var challenge = ticket.GetProperty(OpenIdConnectConstants.Properties.CodeChallenge);
if (request.IsAuthorizationCodeGrantType() && !string.IsNullOrEmpty(challenge))
{
// Get the code verifier from the token request.
// If it cannot be found, return an invalid_grant error.
var verifier = request.CodeVerifier;
if (string.IsNullOrEmpty(verifier))
{
Logger.LogError("The token request was rejected because the required 'code_verifier' " +
"parameter was missing from the grant_type=authorization_code request.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'code_verifier' parameter is missing."
}));
}
// Note: the code challenge method is always validated when receiving the authorization request.
var method = ticket.GetProperty(OpenIdConnectConstants.Properties.CodeChallengeMethod);
Debug.Assert(string.IsNullOrEmpty(method) ||
string.Equals(method, OpenIdConnectConstants.CodeChallengeMethods.Plain, StringComparison.Ordinal) ||
string.Equals(method, OpenIdConnectConstants.CodeChallengeMethods.Sha256, StringComparison.Ordinal),
"The specified code challenge method should be supported.");
// If the S256 challenge method was used, compute the hash corresponding to the code verifier.
if (string.Equals(method, OpenIdConnectConstants.CodeChallengeMethods.Sha256, StringComparison.Ordinal))
{
using (var algorithm = SHA256.Create())
{
// Compute the SHA-256 hash of the code verifier and encode it using base64-url.
// See https://tools.ietf.org/html/rfc7636#section-4.6 for more information.
var hash = algorithm.ComputeHash(Encoding.ASCII.GetBytes(request.CodeVerifier));
verifier = Base64UrlEncoder.Encode(hash);
}
}
// Compare the verifier and the code challenge: if the two don't match, return an error.
// Note: to prevent timing attacks, a time-constant comparer is always used.
if (!OpenIdConnectServerHelpers.AreEqual(verifier, challenge))
{
Logger.LogError("The token request was rejected because the 'code_verifier' was invalid.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "The specified 'code_verifier' parameter is invalid."
}));
}
}
if (request.IsRefreshTokenGrantType() && !string.IsNullOrEmpty(request.Scope))
{
// When an explicit scope parameter has been included in the token request
// but was missing from the initial request, the request MUST be rejected.
// See http://tools.ietf.org/html/rfc6749#section-6
var scopes = ticket.GetScopes();
if (!scopes.Any())
{
Logger.LogError("The token request was rejected because the 'scope' parameter was not allowed.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "The 'scope' parameter is not valid in this context."
}));
}
// When an explicit scope parameter has been included in the token request,
// the authorization server MUST ensure that it doesn't contain scopes
// that were not allowed during the initial authorization/token request.
// See https://tools.ietf.org/html/rfc6749#section-6
else if (!new HashSet <string>(scopes).IsSupersetOf(request.GetScopes()))
{
Logger.LogError("The token request was rejected because the 'scope' parameter was not valid.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "The specified 'scope' parameter is invalid."
}));
}
}
}
var notification = new HandleTokenRequestContext(Context, Scheme, Options, request, ticket);
await Provider.HandleTokenRequest(notification);
if (notification.Result != null)
{
if (notification.Result.Handled)
{
Logger.LogDebug("The token request was handled in user code.");
return(true);
}
else if (notification.Result.Skipped)
{
Logger.LogDebug("The default token request handling was skipped from user code.");
return(false);
}
}
else if (notification.IsRejected)
{
Logger.LogError("The token request was rejected with the following error: {Error} ; {Description}",
/* Error: */ notification.Error ?? OpenIdConnectConstants.Errors.InvalidGrant,
/* Description: */ notification.ErrorDescription);
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = notification.Error ?? OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = notification.ErrorDescription,
ErrorUri = notification.ErrorUri
}));
}
// Flow the changes made to the ticket.
ticket = notification.Ticket;
// Ensure an authentication ticket has been provided or return
// an error code indicating that the request was rejected.
if (ticket == null)
{
Logger.LogError("The token request was rejected because it was not handled by the user code.");
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The token request was rejected by the authorization server."
}));
}
return(await SignInAsync(ticket));
}
