public void GetResources_ReturnsExpectedResources(string resource, string[] resources)
{
// Arrange
var ticket = new AuthenticationTicket(
new ClaimsIdentity(),
new AuthenticationProperties());
ticket.Properties.Dictionary[OpenIdConnectConstants.Properties.Resources] = resource;
// Act and assert
Assert.Equal(resources, ticket.GetResources());
}
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 <string> SerializeAccessTokenAsync(
ClaimsPrincipal principal, AuthenticationProperties properties,
OpenIdConnectRequest request, OpenIdConnectResponse response)
{
// Create a new principal containing only the filtered claims.
// Actors identities are also filtered (delegation scenarios).
principal = principal.Clone(claim =>
{
// Never exclude the subject claim.
if (string.Equals(claim.Type, OpenIdConnectConstants.Claims.Subject, StringComparison.OrdinalIgnoreCase))
{
return(true);
}
// Claims whose destination is not explicitly referenced or doesn't
// contain "access_token" are not included in the access token.
if (!claim.HasDestination(OpenIdConnectConstants.Destinations.AccessToken))
{
Logger.LogDebug("'{Claim}' was excluded from the access token claims.", claim.Type);
return(false);
}
return(true);
});
// Remove the destinations from the claim properties.
foreach (var claim in principal.Claims)
{
claim.Properties.Remove(OpenIdConnectConstants.Properties.Destinations);
}
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.Properties.IssuedUtc = Options.SystemClock.UtcNow;
ticket.Properties.ExpiresUtc = ticket.Properties.IssuedUtc +
(ticket.GetAccessTokenLifetime() ?? Options.AccessTokenLifetime);
ticket.SetUsage(OpenIdConnectConstants.Usages.AccessToken);
ticket.SetAudiences(ticket.GetResources());
// Associate a random identifier with the access token.
ticket.SetTicketId(Guid.NewGuid().ToString());
// Remove the unwanted properties from the authentication ticket.
ticket.RemoveProperty(OpenIdConnectConstants.Properties.AccessTokenLifetime)
.RemoveProperty(OpenIdConnectConstants.Properties.AuthorizationCodeLifetime)
.RemoveProperty(OpenIdConnectConstants.Properties.ClientId)
.RemoveProperty(OpenIdConnectConstants.Properties.CodeChallenge)
.RemoveProperty(OpenIdConnectConstants.Properties.CodeChallengeMethod)
.RemoveProperty(OpenIdConnectConstants.Properties.IdentityTokenLifetime)
.RemoveProperty(OpenIdConnectConstants.Properties.Nonce)
.RemoveProperty(OpenIdConnectConstants.Properties.RedirectUri)
.RemoveProperty(OpenIdConnectConstants.Properties.RefreshTokenLifetime);
var notification = new SerializeAccessTokenContext(Context, Options, request, response, ticket)
{
DataFormat = Options.AccessTokenFormat,
Issuer = Context.GetIssuer(Options),
SecurityTokenHandler = Options.AccessTokenHandler,
SigningCredentials = Options.SigningCredentials.FirstOrDefault(key => key.Key is SymmetricSecurityKey) ??
Options.SigningCredentials.FirstOrDefault()
};
await Options.Provider.SerializeAccessToken(notification);
if (notification.HandledResponse || !string.IsNullOrEmpty(notification.AccessToken))
{
return(notification.AccessToken);
}
else if (notification.Skipped)
{
return(null);
}
if (!ReferenceEquals(ticket, notification.Ticket))
{
throw new InvalidOperationException("The authentication ticket cannot be replaced.");
}
if (notification.SecurityTokenHandler == null)
{
return(notification.DataFormat?.Protect(ticket));
}
// At this stage, throw an exception if no signing credentials were provided.
if (notification.SigningCredentials == null)
{
throw new InvalidOperationException("A signing key must be provided.");
}
// Extract the main identity from the principal.
identity = (ClaimsIdentity)ticket.Principal.Identity;
// Store the "unique_id" property as a claim.
identity.AddClaim(OpenIdConnectConstants.Claims.JwtId, ticket.GetTicketId());
// Store the "usage" property as a claim.
identity.AddClaim(OpenIdConnectConstants.Claims.Usage, ticket.GetUsage());
// Store the "confidentiality_level" property as a claim.
var confidentiality = ticket.GetProperty(OpenIdConnectConstants.Properties.ConfidentialityLevel);
if (!string.IsNullOrEmpty(confidentiality))
{
identity.AddClaim(OpenIdConnectConstants.Claims.ConfidentialityLevel, confidentiality);
}
// 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);
}
// Store the audiences as claims.
foreach (var audience in notification.Audiences)
{
identity.AddClaim(OpenIdConnectConstants.Claims.Audience, audience);
}
// Extract the presenters from the authentication ticket.
var presenters = notification.Presenters.ToArray();
switch (presenters.Length)
{
case 0: break;
case 1:
identity.AddClaim(OpenIdConnectConstants.Claims.AuthorizedParty, 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(OpenIdConnectConstants.Claims.AuthorizedParty, presenters[0]);
break;
}
var token = notification.SecurityTokenHandler.CreateToken(new SecurityTokenDescriptor
{
Subject = identity,
Issuer = notification.Issuer,
SigningCredentials = notification.SigningCredentials,
IssuedAt = notification.Ticket.Properties.IssuedUtc?.UtcDateTime,
NotBefore = notification.Ticket.Properties.IssuedUtc?.UtcDateTime,
Expires = notification.Ticket.Properties.ExpiresUtc?.UtcDateTime
});
return(notification.SecurityTokenHandler.WriteToken(token));
}
private async Task <string> SerializeAccessTokenAsync(
ClaimsIdentity identity, AuthenticationProperties properties,
OpenIdConnectRequest request, OpenIdConnectResponse response)
{
// 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.Properties.IssuedUtc = Options.SystemClock.UtcNow;
ticket.Properties.ExpiresUtc = ticket.Properties.IssuedUtc +
(ticket.GetAccessTokenLifetime() ?? Options.AccessTokenLifetime);
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 (notification.HandledResponse || !string.IsNullOrEmpty(notification.AccessToken))
{
return(notification.AccessToken);
}
else if (notification.Skipped)
{
return(null);
}
if (!notification.Audiences.Any())
{
Options.Logger.LogInformation("No explicit audience was associated with the access token.");
}
if (notification.SecurityTokenHandler == null)
{
return(notification.DataFormat?.Protect(ticket));
}
if (notification.SigningCredentials == null)
{
throw new InvalidOperationException("A signing key must be provided.");
}
// 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());
// Store the "confidentiality_level" property as a claim.
var confidentiality = ticket.GetProperty(OpenIdConnectConstants.Properties.ConfidentialityLevel);
if (!string.IsNullOrEmpty(confidentiality))
{
identity.AddClaim(OpenIdConnectConstants.Claims.ConfidentialityLevel, confidentiality);
}
// 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)
{
ticket.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 = ticket.Identity.FindFirst(OpenIdConnectConstants.Claims.Subject);
if (subject == null)
{
var identifier = ticket.Identity.FindFirst(ClaimTypes.NameIdentifier);
if (identifier != null)
{
ticket.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 notification.Audiences)
{
ticket.Identity.AddClaim(OpenIdConnectConstants.Claims.Audience, audience);
}
// Extract the presenters from the authentication ticket.
var presenters = notification.Presenters.ToArray();
switch (presenters.Length)
{
case 0: break;
case 1:
ticket.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.
ticket.Identity.AddClaim(OpenIdConnectConstants.Claims.AuthorizedParty, presenters[0]);
break;
}
if (ticket.Properties.IssuedUtc != null)
{
ticket.Identity.AddClaim(new Claim(
OpenIdConnectConstants.Claims.IssuedAt,
EpochTime.GetIntDate(ticket.Properties.IssuedUtc.Value.UtcDateTime).ToString(),
ClaimValueTypes.Integer64));
}
var descriptor = new SecurityTokenDescriptor {
Subject = ticket.Identity,
TokenIssuerName = notification.Issuer,
EncryptingCredentials = notification.EncryptingCredentials,
SigningCredentials = notification.SigningCredentials,
Lifetime = new Lifetime(
notification.Ticket.Properties.IssuedUtc?.UtcDateTime,
notification.Ticket.Properties.ExpiresUtc?.UtcDateTime)
};
var token = notification.SecurityTokenHandler.CreateToken(descriptor);
return(notification.SecurityTokenHandler.WriteToken(token));
}
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(null, 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))
{
Options.Logger.LogError("The token request was rejected because the " +
"mandatory 'Content-Type' header was missing.");
return(await SendTokenResponseAsync(null, 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))
{
Options.Logger.LogError("The token request was rejected because an invalid 'Content-Type' " +
"header was received: {ContentType}.", Request.ContentType);
return(await SendTokenResponseAsync(null, 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 request = new OpenIdConnectMessage(await Request.ReadFormAsync())
{
RequestType = OpenIdConnectRequestType.TokenRequest
};
// Store the token request in the OWIN context.
Context.SetOpenIdConnectRequest(request);
// 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(request, 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))
{
Options.Logger.LogError("The token request was rejected because the authorization code was missing.");
return(await SendTokenResponseAsync(request, 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.GetRefreshToken()))
{
Options.Logger.LogError("The token request was rejected because the refresh token was missing.");
return(await SendTokenResponseAsync(request, 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)))
{
Options.Logger.LogError("The token request was rejected because the resource owner credentials were missing.");
return(await SendTokenResponseAsync(request, 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))
{
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 (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(request, new OpenIdConnectMessage {
Error = context.Error ?? OpenIdConnectConstants.Errors.InvalidClient,
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(request, 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 (context.IsValidated && string.IsNullOrEmpty(request.ClientId))
{
Options.Logger.LogError("The token request was validated but the client_id was not set.");
return(await SendTokenResponseAsync(request, 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.GetRefreshToken(), 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(request, new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Invalid 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(request, 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() && !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(request, 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())
{
Options.Logger.LogError("The token request was rejected because the authorization " +
"code didn't contain any valid presenter.");
return(await SendTokenResponseAsync(request, 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 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(request, 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))
{
Options.Logger.LogError("The token request was rejected because the authorization " +
"code was issued to a different client application.");
return(await SendTokenResponseAsync(request, 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.Dictionary.Remove(OpenIdConnectConstants.Properties.RedirectUri);
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(request, new OpenIdConnectMessage {
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(request, new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Authorization code does not contain matching redirect_uri"
}));
}
}
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(request, new OpenIdConnectMessage {
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(request, new OpenIdConnectMessage {
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(request, 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 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(request, new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Token request doesn't contain a valid scope parameter"
}));
}
}
if (request.IsAuthorizationCodeGrantType())
{
// Note: the authentication ticket is copied to avoid modifying the properties of the authorization code.
var grant = new GrantAuthorizationCodeContext(Context, Options, request, ticket.Copy());
await Options.Provider.GrantAuthorizationCode(grant);
if (!grant.IsValidated)
{
// Note: use invalid_grant as the default error if none has been explicitly provided.
return(await SendTokenResponseAsync(request, new OpenIdConnectMessage {
Error = grant.Error ?? OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = grant.ErrorDescription,
ErrorUri = grant.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 (grant.Ticket.Properties.IssuedUtc == ticket.Properties.IssuedUtc)
{
grant.Ticket.Properties.IssuedUtc = null;
}
if (grant.Ticket.Properties.ExpiresUtc == ticket.Properties.ExpiresUtc)
{
grant.Ticket.Properties.ExpiresUtc = null;
}
ticket = grant.Ticket;
}
else
{
// Note: the authentication ticket is copied to avoid modifying the properties of the refresh token.
var grant = new GrantRefreshTokenContext(Context, Options, request, ticket.Copy());
await Options.Provider.GrantRefreshToken(grant);
if (!grant.IsValidated)
{
// Note: use invalid_grant as the default error if none has been explicitly provided.
return(await SendTokenResponseAsync(request, new OpenIdConnectMessage {
Error = grant.Error ?? OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = grant.ErrorDescription,
ErrorUri = grant.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 (grant.Ticket.Properties.IssuedUtc == ticket.Properties.IssuedUtc)
{
grant.Ticket.Properties.IssuedUtc = null;
}
if (grant.Ticket.Properties.ExpiresUtc == ticket.Properties.ExpiresUtc)
{
grant.Ticket.Properties.ExpiresUtc = null;
}
ticket = grant.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 grant = new GrantResourceOwnerCredentialsContext(Context, Options, request);
await Options.Provider.GrantResourceOwnerCredentials(grant);
if (!grant.IsValidated)
{
// Note: use invalid_grant as the default error if none has been explicitly provided.
return(await SendTokenResponseAsync(request, new OpenIdConnectMessage {
Error = grant.Error ?? OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = grant.ErrorDescription,
ErrorUri = grant.ErrorUri
}));
}
ticket = grant.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 grant = new GrantClientCredentialsContext(Context, Options, request);
await Options.Provider.GrantClientCredentials(grant);
if (!grant.IsValidated)
{
// Note: use unauthorized_client as the default error if none has been explicitly provided.
return(await SendTokenResponseAsync(request, new OpenIdConnectMessage {
Error = grant.Error ?? OpenIdConnectConstants.Errors.UnauthorizedClient,
ErrorDescription = grant.ErrorDescription,
ErrorUri = grant.ErrorUri
}));
}
ticket = grant.Ticket;
}
// See http://tools.ietf.org/html/rfc6749#section-8.3
else
{
var grant = new GrantCustomExtensionContext(Context, Options, request);
await Options.Provider.GrantCustomExtension(grant);
if (!grant.IsValidated)
{
// Note: use unsupported_grant_type as the default error if none has been explicitly provided.
return(await SendTokenResponseAsync(request, new OpenIdConnectMessage {
Error = grant.Error ?? OpenIdConnectConstants.Errors.UnsupportedGrantType,
ErrorDescription = grant.ErrorDescription,
ErrorUri = grant.ErrorUri
}));
}
ticket = grant.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)
{
Options.Logger.LogError("The token request was rejected because no authentication " +
"ticket was returned by application code.");
return(await SendTokenResponseAsync(request, new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.ServerError
}));
}
if (context.IsValidated)
{
// Store a boolean indicating whether the ticket should be marked as confidential.
ticket.Properties.Dictionary[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.Dictionary.ContainsKey(OpenIdConnectConstants.Properties.Scopes) &&
request.HasScope(OpenIdConnectConstants.Scopes.OpenId))
{
ticket.Properties.Dictionary[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.Dictionary.ContainsKey(OpenIdConnectConstants.Properties.Resources) &&
ticket.Properties.Dictionary.TryGetValue(OpenIdConnectConstants.Properties.Audiences, out audiences))
{
ticket.Properties.Dictionary[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();
// When receiving a grant_type=refresh_token request, determine whether the client application
// requests a limited set of resources and replace the "resources" property if necessary.
if (request.IsRefreshTokenGrantType() && !string.IsNullOrEmpty(request.Resource))
{
// Replace the resources initially granted by the resources listed by the client application in the token request.
// Note: at this stage, request.GetResources() cannot return more items than the ones that were initially granted
// by the resource owner as the "resources" parameter is always validated when receiving the token request.
properties.Dictionary[OpenIdConnectConstants.Properties.Resources] = string.Join(" ", request.GetResources());
}
// Note: when the "resource" parameter added to the OpenID Connect response
// is identical to the request parameter, returning it is not necessary.
var resources = properties.GetProperty(OpenIdConnectConstants.Properties.Resources);
if (request.IsAuthorizationCodeGrantType() || (!string.IsNullOrEmpty(resources) &&
!string.IsNullOrEmpty(request.Resource) &&
!string.Equals(request.Resource, resources, StringComparison.Ordinal)))
{
response.Resource = resources;
}
// When receiving a grant_type=refresh_token request, determine whether the client application
// requests a limited set of scopes and replace the "scopes" property if necessary.
if (request.IsRefreshTokenGrantType() && !string.IsNullOrEmpty(request.Scope))
{
// Replace the scopes initially granted by the scopes listed by the client application in the token request.
// Note: at this stage, request.GetScopes() cannot return more items than the ones that were initially granted
// by the resource owner as the "scope" parameter is always validated when receiving the token request.
properties.Dictionary[OpenIdConnectConstants.Properties.Scopes] = string.Join(" ", request.GetScopes());
}
// Note: when the "scope" parameter added to the OpenID Connect response
// is identical to the request parameter, returning it is not necessary.
var scopes = properties.GetProperty(OpenIdConnectConstants.Properties.Scopes);
if (request.IsAuthorizationCodeGrantType() || (!string.IsNullOrEmpty(scopes) &&
!string.IsNullOrEmpty(request.Scope) &&
!string.Equals(request.Scope, scopes, StringComparison.Ordinal)))
{
response.Scope = scopes;
}
response.TokenType = OpenIdConnectConstants.TokenTypes.Bearer;
response.AccessToken = await SerializeAccessTokenAsync(ticket.Identity, 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))
{
Options.Logger.LogError("An error occurred during the serialization of the " +
"access token and a null value was returned.");
return(await SendTokenResponseAsync(request, 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.Identity, 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))
{
Options.Logger.LogError("An error occurred during the serialization of the " +
"identity token and a null value was returned.");
return(await SendTokenResponseAsync(request, 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.SetRefreshToken(await SerializeRefreshTokenAsync(ticket.Identity, properties, request, response));
}
return(await SendTokenResponseAsync(request, response, ticket));
}
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 <bool> HandleSignInAsync(AuthenticationTicket ticket)
{
// Extract the OpenID Connect request from the ASP.NET context.
// If it cannot be found or doesn't correspond to an authorization
// or a token request, throw an InvalidOperationException.
var request = Context.GetOpenIdConnectRequest();
if (request == null || (!request.IsAuthorizationRequest() && !request.IsTokenRequest()))
{
throw new InvalidOperationException("An OpenID Connect response cannot be returned from this endpoint.");
}
// Note: if an OpenID Connect response was already generated, throw an exception.
var response = Context.GetOpenIdConnectResponse();
if (response != null)
{
throw new InvalidOperationException("An OpenID Connect response has already been sent.");
}
if (string.IsNullOrEmpty(ticket.Principal.GetClaim(OpenIdConnectConstants.Claims.Subject)))
{
throw new InvalidOperationException("The authentication ticket was rejected because " +
"it doesn't contain the mandatory subject claim.");
}
// Prepare a new OpenID Connect response.
response = new OpenIdConnectResponse();
if (request.IsAuthorizationRequest())
{
response.RedirectUri = request.GetProperty <string>(OpenIdConnectConstants.Properties.RedirectUri);
response.State = request.State;
}
// Copy the confidentiality level associated with the request to the authentication ticket.
if (!ticket.HasProperty(OpenIdConnectConstants.Properties.ConfidentialityLevel))
{
ticket.SetProperty(OpenIdConnectConstants.Properties.ConfidentialityLevel,
request.GetProperty <string>(OpenIdConnectConstants.Properties.ConfidentialityLevel));
}
// 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 (request.HasScope(OpenIdConnectConstants.Scopes.OpenId) && !ticket.HasScope())
{
ticket.SetScopes(OpenIdConnectConstants.Scopes.OpenId);
}
// When a "resources" property cannot be found in the ticket,
// infer it from the "audiences" property.
if (ticket.HasAudience() && !ticket.HasResource())
{
ticket.SetResources(ticket.GetAudiences());
}
// Add the validated client_id to the list of authorized presenters,
// unless the presenters were explicitly set by the developer.
var presenter = request.GetProperty <string>(OpenIdConnectConstants.Properties.ClientId);
if (!string.IsNullOrEmpty(presenter) && !ticket.HasPresenter())
{
ticket.SetPresenters(presenter);
}
// Only return an authorization code if the request is an authorization request and has response_type=code.
if (request.IsAuthorizationRequest() && request.HasResponseType(OpenIdConnectConstants.ResponseTypes.Code))
{
// 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.Code = await SerializeAuthorizationCodeAsync(ticket.Principal, properties, request, response);
}
// Only return an access token if the request is a token request
// or an authorization request that specifies response_type=token.
if (request.IsTokenRequest() || (request.IsAuthorizationRequest() &&
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();
// When receiving a grant_type=refresh_token request, determine whether the client application
// requests a limited set of scopes/resources and replace the corresponding properties if necessary.
// Note: at this stage, request.GetResources() cannot return more items than the ones that were initially granted
// by the resource owner as the "resources" parameter is always validated when receiving the token request.
if (request.IsTokenRequest() && request.IsRefreshTokenGrantType())
{
if (!string.IsNullOrEmpty(request.Resource))
{
Logger.LogDebug("The access token resources will be limited to the resources " +
"requested by the client application: {Resources}.", request.GetResources());
// Replace the resources initially granted by the resources listed by the client application in the token request.
// Note: request.GetResources() automatically removes duplicate entries, so additional filtering is not necessary.
properties.SetProperty(OpenIdConnectConstants.Properties.Resources, request.GetResources());
}
if (!string.IsNullOrEmpty(request.Scope))
{
Logger.LogDebug("The access token scopes will be limited to the scopes " +
"requested by the client application: {Scopes}.", request.GetScopes());
// Replace the scopes initially granted by the scopes listed by the client application in the token request.
// Note: request.GetScopes() automatically removes duplicate entries, so additional filtering is not necessary.
properties.SetProperty(OpenIdConnectConstants.Properties.Scopes, request.GetScopes());
}
}
var resources = ticket.GetResources();
if (request.IsAuthorizationCodeGrantType() || !new HashSet <string>(resources).SetEquals(request.GetResources()))
{
response.Resource = string.Join(" ", resources);
}
var scopes = ticket.GetScopes();
if (request.IsAuthorizationCodeGrantType() || !new HashSet <string>(scopes).SetEquals(request.GetScopes()))
{
response.Scope = string.Join(" ", scopes);
}
response.TokenType = OpenIdConnectConstants.TokenTypes.Bearer;
response.AccessToken = await SerializeAccessTokenAsync(ticket.Principal, properties, request, response);
// 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;
response.ExpiresIn = (long)(lifetime.TotalSeconds + .5);
}
}
// Only return a refresh token if the request is a token request that specifies scope=offline_access.
if (request.IsTokenRequest() && ticket.HasScope(OpenIdConnectConstants.Scopes.OfflineAccess))
{
// Note: when sliding expiration is disabled, don't return a new refresh token,
// unless the token request is not a grant_type=refresh_token request.
if (Options.UseSlidingExpiration || !request.IsRefreshTokenGrantType())
{
// 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);
}
}
// Only return an identity token if the openid scope was requested and granted
// to avoid generating and returning an unnecessary token to pure OAuth2 clients.
if (ticket.HasScope(OpenIdConnectConstants.Scopes.OpenId))
{
// Note: don't return an identity token if the request is an
// authorization request that doesn't use response_type=id_token.
if (request.IsTokenRequest() || 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);
}
}
if (request.IsAuthorizationRequest())
{
return(await SendAuthorizationResponseAsync(response, ticket));
}
return(await SendTokenResponseAsync(response, ticket));
}
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> SerializeAccessTokenAsync(
ClaimsIdentity identity, AuthenticationProperties properties,
OpenIdConnectRequest request, OpenIdConnectResponse response)
{
// Create a new identity containing only the filtered claims.
// Actors identities are also filtered (delegation scenarios).
identity = identity.Clone(claim =>
{
// Never exclude the subject claim.
if (string.Equals(claim.Type, OpenIdConnectConstants.Claims.Subject, StringComparison.OrdinalIgnoreCase))
{
return(true);
}
// Claims whose destination is not explicitly referenced or doesn't
// contain "access_token" are not included in the access token.
if (!claim.HasDestination(OpenIdConnectConstants.Destinations.AccessToken))
{
Logger.LogDebug("'{Claim}' was excluded from the access token claims.", claim.Type);
return(false);
}
return(true);
});
// Remove the destinations from the claim properties.
foreach (var claim in identity.Claims)
{
claim.Properties.Remove(OpenIdConnectConstants.Properties.Destinations);
}
// Create a new ticket containing the updated properties and the filtered identity.
var ticket = new AuthenticationTicket(identity, properties);
ticket.Properties.IssuedUtc = Options.SystemClock.UtcNow;
ticket.Properties.ExpiresUtc = ticket.Properties.IssuedUtc;
ticket.Properties.ExpiresUtc += ticket.GetAccessTokenLifetime() ?? Options.AccessTokenLifetime;
// Associate a random identifier with the access token.
ticket.SetTokenId(Guid.NewGuid().ToString());
ticket.SetAudiences(ticket.GetResources());
// Remove the unwanted properties from the authentication ticket.
ticket.RemoveProperty(OpenIdConnectConstants.Properties.AccessTokenLifetime)
.RemoveProperty(OpenIdConnectConstants.Properties.AuthorizationCodeLifetime)
.RemoveProperty(OpenIdConnectConstants.Properties.CodeChallenge)
.RemoveProperty(OpenIdConnectConstants.Properties.CodeChallengeMethod)
.RemoveProperty(OpenIdConnectConstants.Properties.IdentityTokenLifetime)
.RemoveProperty(OpenIdConnectConstants.Properties.Nonce)
.RemoveProperty(OpenIdConnectConstants.Properties.OriginalRedirectUri)
.RemoveProperty(OpenIdConnectConstants.Properties.RefreshTokenLifetime)
.RemoveProperty(OpenIdConnectConstants.Properties.TokenUsage);
var notification = new SerializeAccessTokenContext(Context, Options, request, response, ticket)
{
DataFormat = Options.AccessTokenFormat,
Issuer = Context.GetIssuer(Options),
SecurityTokenHandler = Options.AccessTokenHandler,
SigningCredentials = Options.SigningCredentials.FirstOrDefault(key => key.SigningKey is SymmetricSecurityKey) ??
Options.SigningCredentials.FirstOrDefault()
};
await Options.Provider.SerializeAccessToken(notification);
if (notification.HandledResponse || !string.IsNullOrEmpty(notification.AccessToken))
{
return(notification.AccessToken);
}
else if (notification.Skipped)
{
return(null);
}
if (notification.SecurityTokenHandler == null)
{
if (notification.DataFormat == null)
{
throw new InvalidOperationException("A security token handler or data formatter must be provided.");
}
var value = notification.DataFormat.Protect(ticket);
Logger.LogTrace("A new access token was successfully generated using the " +
"specified data format: {Token} ; {Claims} ; {Properties}.",
value, ticket.Identity.Claims, ticket.Properties.Dictionary);
return(value);
}
// At this stage, throw an exception if no signing credentials were provided.
if (notification.SigningCredentials == null)
{
throw new InvalidOperationException("A signing key must be provided.");
}
// Store the "usage" property as a claim.
ticket.Identity.AddClaim(OpenIdConnectConstants.Claims.TokenUsage, OpenIdConnectConstants.TokenUsages.AccessToken);
// Store the "unique_id" property as a claim.
ticket.Identity.AddClaim(OpenIdConnectConstants.Claims.JwtId, ticket.GetTokenId());
// Store the "confidentiality_level" property as a claim.
var confidentiality = ticket.GetProperty(OpenIdConnectConstants.Properties.ConfidentialityLevel);
if (!string.IsNullOrEmpty(confidentiality))
{
identity.AddClaim(OpenIdConnectConstants.Claims.ConfidentialityLevel, confidentiality);
}
// 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)
{
ticket.Identity.AddClaim(OpenIdConnectConstants.Claims.Scope, scope);
}
// Store the audiences as claims.
foreach (var audience in notification.Audiences)
{
ticket.Identity.AddClaim(OpenIdConnectConstants.Claims.Audience, audience);
}
// Extract the presenters from the authentication ticket.
var presenters = notification.Presenters.ToArray();
switch (presenters.Length)
{
case 0: break;
case 1:
ticket.Identity.AddClaim(OpenIdConnectConstants.Claims.AuthorizedParty, 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.
ticket.Identity.AddClaim(OpenIdConnectConstants.Claims.AuthorizedParty, presenters[0]);
break;
}
if (ticket.Properties.IssuedUtc != null)
{
ticket.Identity.AddClaim(new Claim(
OpenIdConnectConstants.Claims.IssuedAt,
EpochTime.GetIntDate(ticket.Properties.IssuedUtc.Value.UtcDateTime).ToString(),
ClaimValueTypes.Integer64));
}
var token = notification.SecurityTokenHandler.CreateToken(new SecurityTokenDescriptor
{
Subject = ticket.Identity,
TokenIssuerName = notification.Issuer,
SigningCredentials = notification.SigningCredentials,
Lifetime = new Lifetime(
notification.Ticket.Properties.IssuedUtc?.UtcDateTime,
notification.Ticket.Properties.ExpiresUtc?.UtcDateTime)
});
// When the access token is a JWT token, directly use RawData instead of calling
// JwtSecurityTokenHandler.WriteToken(token) to avoid signing the token twice.
var result = token is JwtSecurityToken jwtSecurityToken ?
jwtSecurityToken.RawData :
notification.SecurityTokenHandler.WriteToken(token);
Logger.LogTrace("A new access token was successfully generated using the specified " +
"security token handler: {Token} ; {Claims} ; {Properties}.",
result, ticket.Identity.Claims, ticket.Properties.Dictionary);
return(result);
}
private async Task <bool> HandleSignInAsync(AuthenticationTicket ticket)
{
// Extract the OpenID Connect request from the OWIN context.
// If it cannot be found or doesn't correspond to an authorization
// or a token request, throw an InvalidOperationException.
var request = Context.GetOpenIdConnectRequest();
if (request == null || (!request.IsAuthorizationRequest() && !request.IsTokenRequest()))
{
throw new InvalidOperationException("An authorization or token response cannot be returned from this endpoint.");
}
// Note: if a response was already generated, throw an exception.
var response = Context.GetOpenIdConnectResponse();
if (response != null)
{
throw new InvalidOperationException("A response has already been sent.");
}
if (string.IsNullOrEmpty(ticket.Identity.GetClaim(OpenIdConnectConstants.Claims.Subject)))
{
throw new InvalidOperationException("The authentication ticket was rejected because " +
"the mandatory subject claim was missing.");
}
Logger.LogTrace("A sign-in operation was triggered: {Claims} ; {Properties}.",
ticket.Identity.Claims, ticket.Properties.Dictionary);
// Prepare a new OpenID Connect response.
response = new OpenIdConnectResponse();
// Copy the confidentiality level associated with the request to the authentication ticket.
if (!ticket.HasProperty(OpenIdConnectConstants.Properties.ConfidentialityLevel))
{
ticket.SetConfidentialityLevel(request.GetProperty <string>(OpenIdConnectConstants.Properties.ConfidentialityLevel));
}
// 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 (request.HasScope(OpenIdConnectConstants.Scopes.OpenId) && !ticket.HasScope())
{
ticket.SetScopes(OpenIdConnectConstants.Scopes.OpenId);
}
// When a "resources" property cannot be found in the ticket,
// infer it from the "audiences" property.
if (ticket.HasAudience() && !ticket.HasResource())
{
ticket.SetResources(ticket.GetAudiences());
}
// Add the validated client_id to the list of authorized presenters,
// unless the presenters were explicitly set by the developer.
var presenter = request.GetProperty <string>(OpenIdConnectConstants.Properties.ValidatedClientId);
if (!string.IsNullOrEmpty(presenter) && !ticket.HasPresenter())
{
ticket.SetPresenters(presenter);
}
var notification = new ProcessSigninResponseContext(Context, Options, ticket, request, response);
if (request.IsAuthorizationRequest())
{
// By default, return an authorization code if a response type containing code was specified.
notification.IncludeAuthorizationCode = request.HasResponseType(OpenIdConnectConstants.ResponseTypes.Code);
// By default, return an access token if a response type containing token was specified.
notification.IncludeAccessToken = request.HasResponseType(OpenIdConnectConstants.ResponseTypes.Token);
// By default, prevent a refresh token from being returned as the OAuth2 specification
// explicitly disallows returning a refresh token from the authorization endpoint.
// See https://tools.ietf.org/html/rfc6749#section-4.2.2 for more information.
notification.IncludeRefreshToken = false;
// By default, return an identity token if a response type containing code
// was specified and if the openid scope was explicitly or implicitly granted.
notification.IncludeIdentityToken =
request.HasResponseType(OpenIdConnectConstants.ResponseTypes.IdToken) &&
ticket.HasScope(OpenIdConnectConstants.Scopes.OpenId);
}
else
{
// By default, prevent an authorization code from being returned as this type of token
// cannot be issued from the token endpoint in the standard OAuth2/OpenID Connect flows.
notification.IncludeAuthorizationCode = false;
// By default, always return an access token.
notification.IncludeAccessToken = true;
// By default, only return a refresh token is the offline_access scope was granted and if
// sliding expiration is disabled or if the request is not a grant_type=refresh_token request.
notification.IncludeRefreshToken =
ticket.HasScope(OpenIdConnectConstants.Scopes.OfflineAccess) &&
(Options.UseSlidingExpiration || !request.IsRefreshTokenGrantType());
// By default, only return an identity token if the openid scope was granted.
notification.IncludeIdentityToken = ticket.HasScope(OpenIdConnectConstants.Scopes.OpenId);
}
await Options.Provider.ProcessSigninResponse(notification);
if (notification.HandledResponse)
{
Logger.LogDebug("The sign-in response was handled in user code.");
return(true);
}
else if (notification.Skipped)
{
Logger.LogDebug("The default sign-in handling was skipped from user code.");
return(false);
}
else if (notification.IsRejected)
{
Logger.LogError("The request was rejected with the following error: {Error} ; {Description}",
/* Error: */ notification.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
/* Description: */ notification.ErrorDescription);
if (request.IsAuthorizationRequest())
{
return(await SendAuthorizationResponseAsync(new OpenIdConnectResponse
{
Error = notification.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = notification.ErrorDescription,
ErrorUri = notification.ErrorUri
}));
}
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = notification.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
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 request was rejected because no authentication ticket was provided.");
if (request.IsAuthorizationRequest())
{
return(await SendAuthorizationResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.AccessDenied,
ErrorDescription = "The authorization was denied by the resource owner."
}));
}
return(await SendTokenResponseAsync(new OpenIdConnectResponse
{
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "The token request was rejected by the authorization server."
}));
}
if (notification.IncludeAuthorizationCode)
{
// 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.Code = await SerializeAuthorizationCodeAsync(ticket.Identity, properties, request, response);
}
if (notification.IncludeAccessToken)
{
// 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();
// When receiving a grant_type=refresh_token request, determine whether the client application
// requests a limited set of scopes/resources and replace the corresponding properties if necessary.
// Note: at this stage, request.GetResources() cannot return more items than the ones that were initially granted
// by the resource owner as the "resources" parameter is always validated when receiving the token request.
if (request.IsTokenRequest() && request.IsRefreshTokenGrantType())
{
if (!string.IsNullOrEmpty(request.Resource))
{
Logger.LogDebug("The access token resources will be limited to the resources requested " +
"by the client application: {Resources}.", request.GetResources());
// Replace the resources initially granted by the resources listed by the client
// application in the token request. Note: request.GetResources() automatically
// removes duplicate entries, so additional filtering is not necessary.
properties.SetProperty(OpenIdConnectConstants.Properties.Resources,
new JArray(request.GetResources()).ToString(Formatting.None));
}
if (!string.IsNullOrEmpty(request.Scope))
{
Logger.LogDebug("The access token scopes will be limited to the scopes requested " +
"by the client application: {Scopes}.", request.GetScopes());
// Replace the scopes initially granted by the scopes listed by the client
// application in the token request. Note: request.GetScopes() automatically
// removes duplicate entries, so additional filtering is not necessary.
properties.SetProperty(OpenIdConnectConstants.Properties.Scopes,
new JArray(request.GetScopes()).ToString(Formatting.None));
}
}
var resources = ticket.GetResources();
if (request.IsAuthorizationCodeGrantType() || !new HashSet <string>(resources).SetEquals(request.GetResources()))
{
response.Resource = string.Join(" ", resources);
}
var scopes = ticket.GetScopes();
if (request.IsAuthorizationCodeGrantType() || !new HashSet <string>(scopes).SetEquals(request.GetScopes()))
{
response.Scope = string.Join(" ", scopes);
}
response.TokenType = OpenIdConnectConstants.TokenTypes.Bearer;
response.AccessToken = await SerializeAccessTokenAsync(ticket.Identity, properties, request, response);
// 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;
response.ExpiresIn = (long)(lifetime.TotalSeconds + .5);
}
}
if (notification.IncludeRefreshToken)
{
// 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.Identity, properties, request, response);
}
if (notification.IncludeIdentityToken)
{
// 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.Identity, properties, request, response);
}
if (request.IsAuthorizationRequest())
{
return(await SendAuthorizationResponseAsync(response, ticket));
}
return(await SendTokenResponseAsync(response, ticket));
}
private async Task InvokeTokenEndpointAsync()
{
if (!string.Equals(Request.Method, "POST", StringComparison.OrdinalIgnoreCase))
{
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "A malformed token request has been received: make sure to use POST."
});
return;
}
// 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 token 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 token 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);
var request = new OpenIdConnectMessage(form.ToDictionary())
{
RequestType = OpenIdConnectRequestType.TokenRequest
};
// 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.");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'grant_type' parameter was missing.",
});
return;
}
// 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.");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'code' parameter was missing."
});
return;
}
// 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.");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'refresh_token' parameter was missing."
});
return;
}
// 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.");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "The mandatory 'username' and/or 'password' parameters " +
"was/were missing from the request message."
});
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("invalid client authentication.");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = clientNotification.Error ?? OpenIdConnectConstants.Errors.InvalidClient,
ErrorDescription = clientNotification.ErrorDescription,
ErrorUri = clientNotification.ErrorUri
});
return;
}
// Reject grant_type=client_credentials requests if client authentication was skipped.
else if (clientNotification.IsSkipped && request.IsClientCredentialsGrantType())
{
Logger.LogError("client authentication is required for client_credentials grant type.");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "client authentication is required when using client_credentials"
});
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;
}
var validatingContext = new ValidateTokenRequestContext(Context, Options, request);
// Validate the token request immediately if the grant type used by
// the client application doesn't rely on a previously-issued token/code.
if (!request.IsAuthorizationCodeGrantType() && !request.IsRefreshTokenGrantType())
{
await Options.Provider.ValidateTokenRequest(validatingContext);
if (!validatingContext.IsValidated)
{
// Note: use invalid_request as the default error if none has been explicitly provided.
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = validatingContext.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = validatingContext.ErrorDescription,
ErrorUri = validatingContext.ErrorUri
});
return;
}
}
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("invalid ticket");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Invalid ticket"
});
return;
}
if (!ticket.Properties.ExpiresUtc.HasValue ||
ticket.Properties.ExpiresUtc < Options.SystemClock.UtcNow)
{
Logger.LogError("expired ticket");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Expired ticket"
});
return;
}
// 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() && !clientNotification.IsValidated && ticket.IsConfidential())
{
Logger.LogError("client authentication is required to use this ticket");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Client authentication is required to use this ticket"
});
return;
}
// 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 client the authorization code was issued to cannot be resolved.");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.ServerError,
ErrorDescription = "An internal server error occurred."
});
return;
}
// 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("client_id was missing from the token request");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "client_id was missing from the token request"
});
return;
}
// 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("ticket does not contain matching client_id");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Ticket does not contain matching client_id"
});
return;
}
// 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
string address;
if (request.IsAuthorizationCodeGrantType() &&
ticket.Properties.Items.TryGetValue(OpenIdConnectConstants.Properties.RedirectUri, out address))
{
ticket.Properties.Items.Remove(OpenIdConnectConstants.Properties.RedirectUri);
if (string.IsNullOrEmpty(request.RedirectUri))
{
Logger.LogError("redirect_uri was missing from the grant_type=authorization_code request.");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = "redirect_uri was missing from the token request"
});
return;
}
else if (!string.Equals(address, request.RedirectUri, StringComparison.Ordinal))
{
Logger.LogError("authorization code does not contain matching redirect_uri");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Authorization code does not contain matching redirect_uri"
});
return;
}
}
if (!string.IsNullOrEmpty(request.Resource))
{
// When an explicit resource parameter has been included in the token request
// but was missing from the authorization request, the request MUST be rejected.
var resources = ticket.GetResources();
if (!resources.Any())
{
Logger.LogError("token request cannot contain a resource");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Token request cannot contain a resource parameter" +
"if the authorization request didn't contain one"
});
return;
}
// 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 authorization request.
else if (!new HashSet <string>(resources).IsSupersetOf(request.GetResources()))
{
Logger.LogError("token request does not contain matching resource");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Token request doesn't contain a valid resource parameter"
});
return;
}
// Replace the resources initially granted by the resources
// listed by the client application in the token request.
ticket.SetResources(request.GetResources());
}
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("token request cannot contain a scope");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Token request cannot contain a scope parameter" +
"if the authorization request didn't contain one"
});
return;
}
// 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("token request does not contain matching scope");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = "Token request doesn't contain a valid scope parameter"
});
return;
}
// Replace the scopes initially granted by the scopes
// listed by the client application in the token request.
ticket.SetScopes(request.GetScopes());
}
// Expose the authentication ticket extracted from the authorization
// code or the refresh token before invoking ValidateTokenRequest.
validatingContext.AuthenticationTicket = ticket;
await Options.Provider.ValidateTokenRequest(validatingContext);
if (!validatingContext.IsValidated)
{
// Note: use invalid_request as the default error if none has been explicitly provided.
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = validatingContext.Error ?? OpenIdConnectConstants.Errors.InvalidRequest,
ErrorDescription = validatingContext.ErrorDescription,
ErrorUri = validatingContext.ErrorUri
});
return;
}
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.
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = context.Error ?? OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = context.ErrorDescription,
ErrorUri = context.ErrorUri
});
return;
}
ticket = context.AuthenticationTicket;
}
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.
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = context.Error ?? OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = context.ErrorDescription,
ErrorUri = context.ErrorUri
});
return;
}
ticket = context.AuthenticationTicket;
}
// By default, when using the authorization code or the refresh token grants, the authentication ticket
// extracted from the code/token is used as-is. If the developer didn't provide his own ticket
// or didn't set an explicit expiration date, the ticket properties are reset to avoid aligning the
// expiration date of the generated tokens with the lifetime of the authorization code/refresh token.
if (ticket.Properties.IssuedUtc == validatingContext.AuthenticationTicket.Properties.IssuedUtc)
{
ticket.Properties.IssuedUtc = null;
}
if (ticket.Properties.ExpiresUtc == validatingContext.AuthenticationTicket.Properties.ExpiresUtc)
{
ticket.Properties.ExpiresUtc = null;
}
}
// 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.
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = context.Error ?? OpenIdConnectConstants.Errors.InvalidGrant,
ErrorDescription = context.ErrorDescription,
ErrorUri = context.ErrorUri
});
return;
}
ticket = context.AuthenticationTicket;
}
// 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.
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = context.Error ?? OpenIdConnectConstants.Errors.UnauthorizedClient,
ErrorDescription = context.ErrorDescription,
ErrorUri = context.ErrorUri
});
return;
}
ticket = context.AuthenticationTicket;
}
// 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.
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = context.Error ?? OpenIdConnectConstants.Errors.UnsupportedGrantType,
ErrorDescription = context.ErrorDescription,
ErrorUri = context.ErrorUri
});
return;
}
ticket = context.AuthenticationTicket;
}
var notification = new TokenEndpointContext(Context, Options, request, ticket);
await Options.Provider.TokenEndpoint(notification);
if (notification.HandledResponse)
{
return;
}
// 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("authentication ticket missing");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.ServerError
});
return;
}
if (clientNotification.IsValidated)
{
// Store a boolean indicating whether the ticket should be marked as confidential.
ticket.Properties.Items[OpenIdConnectConstants.Properties.Confidential] = "true";
}
// Note: the application is allowed to specify a different "scope": in this case,
// don't replace the "scope" property stored in the authentication ticket.
if (!ticket.Properties.Items.ContainsKey(OpenIdConnectConstants.Properties.Scopes) &&
request.HasScope(OpenIdConnectConstants.Scopes.OpenId))
{
// Always include the "openid" scope when the developer didn't explicitly call SetScopes.
ticket.Properties.Items[OpenIdConnectConstants.Properties.Scopes] = OpenIdConnectConstants.Scopes.OpenId;
}
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;
}
// When sliding expiration is disabled, the access token added to the response
// cannot live longer than the refresh token that was used in the token request.
if (request.IsRefreshTokenGrantType() && !Options.UseSlidingExpiration &&
validatingContext.AuthenticationTicket.Properties.ExpiresUtc.HasValue &&
validatingContext.AuthenticationTicket.Properties.ExpiresUtc.Value <
(Options.SystemClock.UtcNow + Options.AccessTokenLifetime))
{
properties.ExpiresUtc = validatingContext.AuthenticationTicket.Properties.ExpiresUtc;
}
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("SerializeAccessTokenAsync returned no access token.");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.ServerError,
ErrorDescription = "no valid access token was issued"
});
return;
}
// 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();
// When sliding expiration is disabled, the identity token added to the response
// cannot live longer than the refresh token that was used in the token request.
if (request.IsRefreshTokenGrantType() && !Options.UseSlidingExpiration &&
validatingContext.AuthenticationTicket.Properties.ExpiresUtc.HasValue &&
validatingContext.AuthenticationTicket.Properties.ExpiresUtc.Value <
(Options.SystemClock.UtcNow + Options.IdentityTokenLifetime))
{
properties.ExpiresUtc = validatingContext.AuthenticationTicket.Properties.ExpiresUtc;
}
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("SerializeIdentityTokenAsync returned no identity token.");
await SendErrorPayloadAsync(new OpenIdConnectMessage {
Error = OpenIdConnectConstants.Errors.ServerError,
ErrorDescription = "no valid identity token was issued"
});
return;
}
}
// 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) &&
(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();
// When sliding expiration is disabled, the refresh token added to the response
// cannot live longer than the refresh token that was used in the token request.
if (request.IsRefreshTokenGrantType() && !Options.UseSlidingExpiration &&
validatingContext.AuthenticationTicket.Properties.ExpiresUtc.HasValue &&
validatingContext.AuthenticationTicket.Properties.ExpiresUtc.Value <
(Options.SystemClock.UtcNow + Options.RefreshTokenLifetime))
{
properties.ExpiresUtc = validatingContext.AuthenticationTicket.Properties.ExpiresUtc;
}
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 TokenEndpointResponseContext(Context, Options, ticket, request, payload);
await Options.Provider.TokenEndpointResponse(responseNotification);
if (responseNotification.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);
}
}
