public static AssociateRequest Create(OpenIdRelyingParty relyingParty, ServiceEndpoint provider)
{
if (relyingParty == null)
{
throw new ArgumentNullException("relyingParty");
}
if (provider == null)
{
throw new ArgumentNullException("provider");
}
string assoc_type, session_type;
bool requireDiffieHellman = !string.Equals(provider.ProviderEndpoint.Scheme, Uri.UriSchemeHttps, StringComparison.OrdinalIgnoreCase);
if (HmacShaAssociation.TryFindBestAssociation(provider.Protocol,
relyingParty.Settings.MinimumHashBitLength, relyingParty.Settings.MaximumHashBitLength,
requireDiffieHellman, out assoc_type, out session_type))
{
return(Create(relyingParty, provider, assoc_type, session_type, true));
}
else
{
// There are no associations that meet all requirements.
//Logger.Warn("Security requirements and protocol combination knock out all possible association types. Dumb mode forced.");
return(null);
}
}
public AssociateResponse(OpenIdRelyingParty relyingParty, ServiceEndpoint provider, IDictionary <string, string> args, DiffieHellman dh)
: base(relyingParty, provider, args)
{
DH = dh;
if (Args.ContainsKey(Protocol.openidnp.assoc_handle))
{
initializeAssociation();
}
else
{
// Attempt to recover from an unsupported assoc_type
if (Protocol.Version.Major >= 2)
{
if (Util.GetRequiredArg(Args, Protocol.openidnp.error_code) == Protocol.Args.ErrorCode.UnsupportedType)
{
string assoc_type = Util.GetRequiredArg(Args, Protocol.openidnp.assoc_type);
string session_type = Util.GetRequiredArg(Args, Protocol.openidnp.session_type);
// If the suggested options are among those we support...
if (Array.IndexOf(Protocol.Args.SignatureAlgorithm.All, assoc_type) >= 0 &&
Array.IndexOf(Protocol.Args.SessionType.All, session_type) >= 0 &&
RelyingParty.Settings.IsAssociationInPermittedRange(Protocol, assoc_type))
{
SecondAttempt = AssociateRequest.Create(RelyingParty, Provider, assoc_type, session_type, false);
}
}
}
}
}
protected DirectResponse(OpenIdRelyingParty relyingParty, ServiceEndpoint provider, IDictionary <string, string> args)
{
if (relyingParty == null)
{
throw new ArgumentNullException("relyingParty");
}
if (provider == null)
{
throw new ArgumentNullException("provider");
}
if (args == null)
{
throw new ArgumentNullException("args");
}
RelyingParty = relyingParty;
Provider = provider;
Args = args;
// Make sure that the OP fulfills the required OpenID version.
// We don't use Provider.Protocol here because that's just a cache of
// what we _thought_ the OP would support, and our purpose is to double-check this.
ProtocolVersion detectedProtocol = Protocol.DetectFromDirectResponse(args).ProtocolVersion;
if (detectedProtocol < relyingParty.Settings.MinimumRequiredOpenIdVersion)
{
throw new OpenIdException(string.Format(CultureInfo.CurrentCulture,
Strings.MinimumOPVersionRequirementNotMet,
Protocol.Lookup(relyingParty.Settings.MinimumRequiredOpenIdVersion).Version,
Protocol.Lookup(detectedProtocol).Version));
}
}
AuthenticationRequest(ServiceEndpoint endpoint,
Realm realm, Uri returnToUrl, OpenIdRelyingParty relyingParty)
{
if (endpoint == null)
{
throw new ArgumentNullException("endpoint");
}
if (realm == null)
{
throw new ArgumentNullException("realm");
}
if (returnToUrl == null)
{
throw new ArgumentNullException("returnToUrl");
}
if (relyingParty == null)
{
throw new ArgumentNullException("relyingParty");
}
this.endpoint = endpoint;
RelyingParty = relyingParty;
Realm = realm;
ReturnToUrl = returnToUrl;
Mode = AuthenticationRequestMode.Setup;
OutgoingExtensions = ExtensionArgumentsManager.CreateOutgoingExtensions(endpoint.Protocol);
ReturnToArgs = new Dictionary <string, string>();
}
static AuthenticationResponse parseIdResResponse(IDictionary <string, string> query,
ServiceEndpoint tokenEndpoint, ServiceEndpoint responseEndpoint,
OpenIdRelyingParty relyingParty, Uri requestUrl, bool verifyMessageSignature)
{
// Use responseEndpoint if it is available so we get the
// Claimed Identifer correct in the AuthenticationResponse.
ServiceEndpoint unverifiedEndpoint = responseEndpoint ?? tokenEndpoint;
if (unverifiedEndpoint.Protocol.Version.Major < 2)
{
string user_setup_url = Util.GetOptionalArg(query, unverifiedEndpoint.Protocol.openid.user_setup_url);
if (user_setup_url != null)
{
return(new AuthenticationResponse(AuthenticationStatus.SetupRequired, unverifiedEndpoint, query));
}
}
verifyReturnTo(query, unverifiedEndpoint, requestUrl);
verifyDiscoveredInfoMatchesAssertedInfo(relyingParty, query, tokenEndpoint, responseEndpoint);
if (verifyMessageSignature)
{
verifyNonceUnused(query, unverifiedEndpoint, relyingParty.Store);
verifySignature(relyingParty, query, unverifiedEndpoint);
}
return(new AuthenticationResponse(AuthenticationStatus.Authenticated, unverifiedEndpoint, query));
}
/// <summary>
/// Performs request generation for the <see cref="Create"/> method.
/// All data validation and cleansing steps must have ALREADY taken place.
/// </summary>
private static IEnumerable <AuthenticationRequest> CreateInternal(Identifier userSuppliedIdentifier,
OpenIdRelyingParty relyingParty, Realm realm, Uri returnToUrl,
IEnumerable <ServiceEndpoint> serviceEndpoints, bool createNewAssociationsAsNeeded)
{
//Logger.InfoFormat("Performing discovery on user-supplied identifier: {0}", userSuppliedIdentifier);
IEnumerable <ServiceEndpoint> endpoints = filterAndSortEndpoints(serviceEndpoints, relyingParty);
// Maintain a list of endpoints that we could not form an association with.
// We'll fallback to generating requests to these if the ones we CAN create
// an association with run out.
var failedAssociationEndpoints = new List <ServiceEndpoint>(0);
foreach (var endpoint in endpoints)
{
//Logger.InfoFormat("Creating authentication request for user supplied Identifier: {0}", userSuppliedIdentifier);
//Logger.DebugFormat("Realm: {0}", realm);
//Logger.DebugFormat("Return To: {0}", returnToUrl);
// The strategy here is to prefer endpoints with whom we can create associations.
Association association = null;
if (relyingParty.Store != null)
{
// In some scenarios (like the AJAX control wanting ALL auth requests possible),
// we don't want to create associations with every Provider. But we'll use
// associations where they are already formed from previous authentications.
association = getAssociation(relyingParty, endpoint, createNewAssociationsAsNeeded);
if (association == null && createNewAssociationsAsNeeded)
{
//Logger.WarnFormat("Failed to create association with {0}. Skipping to next endpoint.", endpoint.ProviderEndpoint);
// No association could be created. Add it to the list of failed association
// endpoints and skip to the next available endpoint.
failedAssociationEndpoints.Add(endpoint);
continue;
}
}
yield return(new AuthenticationRequest(endpoint, realm, returnToUrl, relyingParty));
}
// Now that we've run out of endpoints that respond to association requests,
// since we apparently are still running, the caller must want another request.
// We'll go ahead and generate the requests to OPs that may be down.
if (failedAssociationEndpoints.Count > 0)
{
//Logger.WarnFormat("Now generating requests for Provider endpoints that failed initial association attempts.");
foreach (var endpoint in failedAssociationEndpoints)
{
//Logger.WarnFormat("Creating authentication request for user supplied Identifier: {0}", userSuppliedIdentifier);
//Logger.DebugFormat("Realm: {0}", realm);
//Logger.DebugFormat("Return To: {0}", returnToUrl);
// Create the auth request, but prevent it from attempting to create an association
// because we've already tried. Let's not have it waste time trying again.
var authRequest = new AuthenticationRequest(endpoint, realm, returnToUrl, relyingParty);
authRequest.associationPreference = AssociationPreference.IfAlreadyEstablished;
yield return(authRequest);
}
}
}
/// <summary>
/// Performs a dumb-mode authentication verification by making an extra
/// request to the provider after the user agent was redirected back
/// to the consumer site with an authenticated status.
/// </summary>
/// <returns>Whether the authentication is valid.</returns>
static void verifySignatureByProvider(OpenIdRelyingParty relyingParty, IDictionary <string, string> query, ServiceEndpoint provider)
{
var request = CheckAuthRequest.Create(relyingParty, provider, query);
if (request.Response.InvalidatedAssociationHandle != null && relyingParty.Store != null)
{
relyingParty.Store.RemoveAssociation(provider.ProviderEndpoint, request.Response.InvalidatedAssociationHandle);
}
if (!request.Response.IsAuthenticationValid)
{
throw new OpenIdException(Strings.InvalidSignature);
}
}
static void verifySignature(OpenIdRelyingParty relyingParty, IDictionary <string, string> query, ServiceEndpoint endpoint)
{
string signed = Util.GetRequiredArg(query, endpoint.Protocol.openid.signed);
string[] signedFields = signed.Split(',');
// Check that all fields that are required to be signed are indeed signed
if (endpoint.Protocol.Version.Major >= 2)
{
verifyFieldsAreSigned(signedFields,
endpoint.Protocol.openidnp.op_endpoint,
endpoint.Protocol.openidnp.return_to,
endpoint.Protocol.openidnp.response_nonce,
endpoint.Protocol.openidnp.assoc_handle);
if (query.ContainsKey(endpoint.Protocol.openid.claimed_id))
{
verifyFieldsAreSigned(signedFields,
endpoint.Protocol.openidnp.claimed_id,
endpoint.Protocol.openidnp.identity);
}
}
else
{
verifyFieldsAreSigned(signedFields,
endpoint.Protocol.openidnp.identity,
endpoint.Protocol.openidnp.return_to);
}
// Now actually validate the signature itself.
string assoc_handle = Util.GetRequiredArg(query, endpoint.Protocol.openid.assoc_handle);
Association assoc = relyingParty.Store != null?relyingParty.Store.GetAssociation(endpoint.ProviderEndpoint, assoc_handle) : null;
if (assoc == null)
{
// It's not an association we know about. Dumb mode is our
// only possible path for recovery.
//Logger.Debug("Passing signature back to Provider for verification (no association available)...");
verifySignatureByProvider(relyingParty, query, endpoint);
}
else
{
if (assoc.IsExpired)
{
throw new OpenIdException(string.Format(CultureInfo.CurrentCulture,
"Association with {0} expired", endpoint.ProviderEndpoint), endpoint.ClaimedIdentifier);
}
//Logger.Debug("Verifying signature by association...");
verifySignatureByAssociation(query, endpoint.Protocol, signedFields, assoc);
}
}
/// <summary>
/// Returns a filtered and sorted list of the available OP endpoints for a discovered Identifier.
/// </summary>
private static List <ServiceEndpoint> filterAndSortEndpoints(IEnumerable <ServiceEndpoint> endpoints,
OpenIdRelyingParty relyingParty)
{
if (endpoints == null)
{
throw new ArgumentNullException("endpoints");
}
if (relyingParty == null)
{
throw new ArgumentNullException("relyingParty");
}
// Construct the endpoints filters based on criteria given by the host web site.
EndpointSelector versionFilter = ep => ((ServiceEndpoint)ep).Protocol.Version >= Protocol.Lookup(relyingParty.Settings.MinimumRequiredOpenIdVersion).Version;
EndpointSelector hostingSiteFilter = relyingParty.EndpointFilter ?? (ep => true);
bool anyFilteredOut = false;
var filteredEndpoints = new List <IXrdsProviderEndpoint>();
foreach (ServiceEndpoint endpoint in endpoints)
{
if (versionFilter(endpoint) && hostingSiteFilter(endpoint))
{
filteredEndpoints.Add(endpoint);
}
else
{
anyFilteredOut = true;
}
}
// Sort endpoints so that the first one in the list is the most preferred one.
filteredEndpoints.Sort(relyingParty.EndpointOrder);
List <ServiceEndpoint> endpointList = new List <ServiceEndpoint>(filteredEndpoints.Count);
foreach (ServiceEndpoint endpoint in filteredEndpoints)
{
endpointList.Add(endpoint);
}
if (anyFilteredOut)
{
//Logger.DebugFormat("Some endpoints were filtered out. Total endpoints remaining: {0}", filteredEndpoints.Count);
}
return(endpointList);
}
/// <summary>
/// Performs identifier discovery and creates associations and generates authentication requests
/// on-demand for as long as new ones can be generated based on the results of Identifier discovery.
/// </summary>
internal static IEnumerable <AuthenticationRequest> Create(Identifier userSuppliedIdentifier,
OpenIdRelyingParty relyingParty, Realm realm, Uri returnToUrl, bool createNewAssociationsAsNeeded)
{
// We have a long data validation and preparation process
if (userSuppliedIdentifier == null)
{
throw new ArgumentNullException("userSuppliedIdentifier");
}
if (relyingParty == null)
{
throw new ArgumentNullException("relyingParty");
}
if (realm == null)
{
throw new ArgumentNullException("realm");
}
userSuppliedIdentifier = userSuppliedIdentifier.TrimFragment();
if (relyingParty.Settings.RequireSsl)
{
// Rather than check for successful SSL conversion at this stage,
// We'll wait for secure discovery to fail on the new identifier.
userSuppliedIdentifier.TryRequireSsl(out userSuppliedIdentifier);
}
//Logger.InfoFormat("Creating authentication request for user supplied Identifier: {0}",
// userSuppliedIdentifier);
//Logger.DebugFormat("Realm: {0}", realm);
//Logger.DebugFormat("Return To: {0}", returnToUrl);
//Logger.DebugFormat("RequireSsl: {0}", userSuppliedIdentifier.IsDiscoverySecureEndToEnd);
// Throw an exception now if the realm and the return_to URLs don't match
// as required by the provider. We could wait for the provider to test this and
// fail, but this will be faster and give us a better error message.
if (!realm.Contains(returnToUrl))
{
throw new OpenIdException(string.Format(CultureInfo.CurrentCulture,
Strings.ReturnToNotUnderRealm, returnToUrl, realm));
}
// Perform discovery right now (not deferred).
var serviceEndpoints = userSuppliedIdentifier.Discover();
// Call another method that defers request generation.
return(CreateInternal(userSuppliedIdentifier, relyingParty, realm, returnToUrl, serviceEndpoints, createNewAssociationsAsNeeded));
}
public static CheckAuthRequest Create(OpenIdRelyingParty relyingParty, ServiceEndpoint provider, IDictionary <string, string> query)
{
if (relyingParty == null)
{
throw new ArgumentNullException("relyingParty");
}
Protocol protocol = provider.Protocol;
string signed = query[protocol.openid.signed];
if (signed == null)
{
// #XXX: oidutil.log('No signature present; checkAuth aborted')
return(null);
}
// Arguments that are always passed to the server and not
// included in the signature.
string[] whitelist = new string[] { protocol.openidnp.assoc_handle, protocol.openidnp.sig, protocol.openidnp.signed, protocol.openidnp.invalidate_handle };
string[] splitted = signed.Split(',');
// combine the previous 2 arrays (whitelist + splitted) into a new array: signed_array
string[] signed_array = new string[whitelist.Length + splitted.Length];
Array.Copy(whitelist, signed_array, whitelist.Length);
Array.Copy(splitted, 0, signed_array, whitelist.Length, splitted.Length);
var check_args = new Dictionary <string, string>();
foreach (string key in query.Keys)
{
if (key.StartsWith(protocol.openid.Prefix, StringComparison.OrdinalIgnoreCase) &&
Array.IndexOf(signed_array, key.Substring(protocol.openid.Prefix.Length)) > -1)
{
check_args[key] = query[key];
}
}
check_args[protocol.openid.mode] = protocol.Args.Mode.check_authentication;
return(new CheckAuthRequest(relyingParty, provider, check_args));
}
protected DirectRequest(OpenIdRelyingParty relyingParty, ServiceEndpoint provider, IDictionary <string, string> args)
{
if (relyingParty == null)
{
throw new ArgumentNullException("relyingParty");
}
if (provider == null)
{
throw new ArgumentNullException("provider");
}
if (args == null)
{
throw new ArgumentNullException("args");
}
RelyingParty = relyingParty;
Provider = provider;
Args = args;
if (Protocol.QueryDeclaredNamespaceVersion != null &&
!Args.ContainsKey(Protocol.openid.ns))
{
Args.Add(Protocol.openid.ns, Protocol.QueryDeclaredNamespaceVersion);
}
}
public CheckAuthResponse(OpenIdRelyingParty relyingParty, ServiceEndpoint provider, IDictionary <string, string> args)
: base(relyingParty, provider, args)
{
}
static Association getAssociation(OpenIdRelyingParty relyingParty, ServiceEndpoint provider, bool createNewAssociationIfNeeded)
{
if (relyingParty == null)
{
throw new ArgumentNullException("relyingParty");
}
if (provider == null)
{
throw new ArgumentNullException("provider");
}
// If the RP has no application store for associations, there's no point in creating one.
if (relyingParty.Store == null)
{
return(null);
}
// TODO: we need a way to lookup an association that fulfills a given set of security
// requirements. We may have a SHA-1 association and a SHA-256 association that need
// to be called for specifically. (a bizzare scenario, admittedly, making this low priority).
Association assoc = relyingParty.Store.GetAssociation(provider.ProviderEndpoint);
// If the returned association does not fulfill security requirements, ignore it.
if (assoc != null && !relyingParty.Settings.IsAssociationInPermittedRange(provider.Protocol, assoc.GetAssociationType(provider.Protocol)))
{
assoc = null;
}
if ((assoc == null || !assoc.HasUsefulLifeRemaining) && createNewAssociationIfNeeded)
{
var req = AssociateRequest.Create(relyingParty, provider);
if (req == null)
{
// this can happen if security requirements and protocol conflict
// to where there are no association types to choose from.
return(null);
}
if (req.Response != null)
{
// try again if we failed the first time and have a worthy second-try.
if (req.Response.Association == null && req.Response.SecondAttempt != null)
{
//Logger.Warn("Initial association attempt failed, but will retry with Provider-suggested parameters.");
req = req.Response.SecondAttempt;
}
assoc = req.Response.Association;
// Confirm that the association matches the type we requested (section 8.2.1)
// if this is a 2.0 OP (1.x OPs had freedom to differ from the requested type).
if (assoc != null && provider.Protocol.Version.Major >= 2)
{
if (!string.Equals(
req.Args[provider.Protocol.openid.assoc_type],
Util.GetRequiredArg(req.Response.Args, provider.Protocol.openidnp.assoc_type),
StringComparison.Ordinal) ||
!string.Equals(
req.Args[provider.Protocol.openid.session_type],
Util.GetRequiredArg(req.Response.Args, provider.Protocol.openidnp.session_type),
StringComparison.Ordinal))
{
//Logger.ErrorFormat("Provider responded with contradicting association parameters. Requested [{0}, {1}] but got [{2}, {3}] back.",
// req.Args[provider.Protocol.openid.assoc_type],
// req.Args[provider.Protocol.openid.session_type],
// Util.GetRequiredArg(req.Response.Args, provider.Protocol.openidnp.assoc_type),
// Util.GetRequiredArg(req.Response.Args, provider.Protocol.openidnp.session_type));
assoc = null;
}
}
if (assoc != null)
{
//Logger.InfoFormat("Association with {0} established.", provider.ProviderEndpoint);
relyingParty.Store.StoreAssociation(provider.ProviderEndpoint, assoc);
}
else
{
//Logger.ErrorFormat("Association attempt with {0} provider failed.", provider.ProviderEndpoint);
}
}
}
return(assoc);
}
/// <summary>
/// Instantiates an <see cref="AssociateRequest"/> object.
/// </summary>
/// <param name="relyingParty">The RP instance that is creating this request.</param>
/// <param name="provider">The discovered OpenID Provider endpoint information.</param>
/// <param name="args">The arguments assembled for sending to the Provider.</param>
/// <param name="dh">Optional. Supplied only if Diffie-Hellman is used for encrypting the association secret key.</param>
AssociateRequest(OpenIdRelyingParty relyingParty, ServiceEndpoint provider, IDictionary <string, string> args, DiffieHellman dh)
: base(relyingParty, provider, args)
{
DH = dh;
}
/// <remarks>
/// This is documented in OpenId Authentication 2.0 section 11.2.
/// </remarks>
static void verifyDiscoveredInfoMatchesAssertedInfo(OpenIdRelyingParty relyingParty,
IDictionary <string, string> query,
ServiceEndpoint tokenEndpoint, ServiceEndpoint responseEndpoint)
{
//Logger.Debug("Verifying assertion matches identifier discovery results...");
// Verify that the actual version of the OP endpoint matches discovery.
Protocol actualProtocol = Protocol.Detect(query);
Protocol discoveredProtocol = (tokenEndpoint ?? responseEndpoint).Protocol;
if (!actualProtocol.Equals(discoveredProtocol))
{
// Allow an exception so that v1.1 and v1.0 can be seen as identical for this
// verification. v1.0 has no spec, and v1.1 and v1.0 cannot be clearly distinguished
// from the protocol, so detecting their differences is meaningless, and throwing here
// would just break thing unnecessarily.
if (!(actualProtocol.Version.Major == 1 && discoveredProtocol.Version.Major == 1))
{
throw new OpenIdException(string.Format(CultureInfo.CurrentCulture,
Strings.OpenIdDiscoveredAndActualVersionMismatch,
actualProtocol.Version, discoveredProtocol.Version));
}
}
if ((tokenEndpoint ?? responseEndpoint).Protocol.Version.Major < 2)
{
Debug.Assert(tokenEndpoint != null, "Our OpenID 1.x implementation requires an RP token. And this should have been verified by our caller.");
// For 1.x OPs, we only need to verify that the OP Local Identifier
// hasn't changed since we made the request.
if (tokenEndpoint.ProviderLocalIdentifier !=
Util.GetRequiredArg(query, tokenEndpoint.Protocol.openid.identity))
{
throw new OpenIdException(string.Format(CultureInfo.CurrentCulture,
Strings.TamperingDetected, tokenEndpoint.Protocol.openid.identity,
tokenEndpoint.ProviderLocalIdentifier,
Util.GetRequiredArg(query, tokenEndpoint.Protocol.openid.identity)));
}
}
else
{
// In 2.0, we definitely have a responseEndpoint, but may not have a
// tokenEndpoint. If we don't have a tokenEndpoint, or it doesn't match the assertion,
// or if the user gave us an OP Identifier originally, then we need to perform discovery on
// the responseEndpoint.ClaimedIdentifier to verify the OP has authority
// to speak for it.
if (tokenEndpoint == null || // no token included (unsolicited assertion)
tokenEndpoint != responseEndpoint || // the OP is asserting something different than we asked for
tokenEndpoint.ClaimedIdentifier == tokenEndpoint.Protocol.ClaimedIdentifierForOPIdentifier) // or directed identity is in effect
{
Identifier claimedIdentifier = Util.GetRequiredArg(query, responseEndpoint.Protocol.openid.claimed_id);
// Require SSL where appropriate. This will filter out insecure identifiers,
// redirects and provider endpoints automatically. If we find a match after all that
// filtering with the responseEndpoint, then the unsolicited assertion is secure.
if (relyingParty.Settings.RequireSsl && !claimedIdentifier.TryRequireSsl(out claimedIdentifier))
{
throw new OpenIdException(Strings.InsecureWebRequestWithSslRequired, query);
}
//Logger.InfoFormat("Provider asserted an identifier that requires (re)discovery to confirm.");
List <ServiceEndpoint> discoveredEndpoints = new List <ServiceEndpoint>(claimedIdentifier.Discover());
// Make sure the response endpoint matches one of the discovered endpoints.
if (!discoveredEndpoints.Contains(responseEndpoint))
{
throw new OpenIdException(string.Format(CultureInfo.CurrentCulture,
Strings.IssuedAssertionFailsIdentifierDiscovery,
responseEndpoint, Util.ToString(discoveredEndpoints)));
}
}
}
}
internal static AuthenticationResponse Parse(IDictionary <string, string> query,
OpenIdRelyingParty relyingParty, Uri requestUrl, bool verifySignature)
{
if (query == null)
{
throw new ArgumentNullException("query");
}
if (requestUrl == null)
{
throw new ArgumentNullException("requestUrl");
}
//Logger.DebugFormat("OpenID authentication response received:{0}{1}", Environment.NewLine, Util.ToString(query));
ServiceEndpoint tokenEndpoint = null;
// The query parameter may be the POST query or the GET query,
// but the token parameter will always be in the GET query because
// it was added to the return_to parameter list.
IDictionary <string, string> requestUrlQuery = Util.NameValueCollectionToDictionary(
HttpUtility.ParseQueryString(requestUrl.Query));
string token = Util.GetOptionalArg(requestUrlQuery, Token.TokenKey);
if (token != null)
{
token = FixDoublyUriDecodedToken(token);
tokenEndpoint = Token.Deserialize(token, relyingParty.Store).Endpoint;
}
Protocol protocol = Protocol.Detect(query);
string mode = Util.GetRequiredArg(query, protocol.openid.mode);
if (mode.Equals(protocol.Args.Mode.cancel, StringComparison.Ordinal))
{
return(new AuthenticationResponse(AuthenticationStatus.Canceled, tokenEndpoint, query));
}
else if (mode.Equals(protocol.Args.Mode.setup_needed, StringComparison.Ordinal))
{
return(new AuthenticationResponse(AuthenticationStatus.SetupRequired, tokenEndpoint, query));
}
else if (mode.Equals(protocol.Args.Mode.error, StringComparison.Ordinal))
{
throw new OpenIdException(string.Format(CultureInfo.CurrentCulture,
"The provider returned an error: {0}", query[protocol.openid.error]));
}
else if (mode.Equals(protocol.Args.Mode.id_res, StringComparison.Ordinal))
{
// We allow unsolicited assertions (that won't have our own token on it)
// only for OpenID 2.0 providers.
ServiceEndpoint responseEndpoint = null;
if (protocol.Version.Major < 2)
{
if (tokenEndpoint == null)
{
throw new OpenIdException(string.Format(CultureInfo.CurrentCulture,
Strings.MissingInternalQueryParameter, Token.TokenKey));
}
}
else
{
// 2.0 OPs provide enough information to assemble the entire endpoint info,
// except perhaps for the original user supplied identifier, which if available
// allows us to display a friendly XRI.
Identifier friendlyIdentifier = tokenEndpoint != null ? tokenEndpoint.UserSuppliedIdentifier : null;
responseEndpoint = ServiceEndpoint.ParseFromAuthResponse(query, friendlyIdentifier);
// If this is a solicited assertion, we'll have a token with endpoint data too,
// which we can use to more quickly confirm the validity of the claimed
// endpoint info.
}
// At this point, we are guaranteed to have tokenEndpoint ?? responseEndpoint
// set to endpoint data (one or the other or both).
// tokenEndpoint is known good data, whereas responseEndpoint must still be
// verified.
// For the error-handling and cancellation cases, the info does not have to
// be verified, so we'll use whichever one is available.
return(parseIdResResponse(query, tokenEndpoint, responseEndpoint, relyingParty, requestUrl, verifySignature));
}
else
{
throw new OpenIdException(string.Format(CultureInfo.CurrentCulture,
Strings.InvalidOpenIdQueryParameterValue,
protocol.openid.mode, mode), query);
}
}
public static AssociateRequest Create(OpenIdRelyingParty relyingParty, ServiceEndpoint provider, string assoc_type, string session_type, bool allowNoSession)
{
if (relyingParty == null)
{
throw new ArgumentNullException("relyingParty");
}
if (provider == null)
{
throw new ArgumentNullException("provider");
}
if (assoc_type == null)
{
throw new ArgumentNullException("assoc_type");
}
if (session_type == null)
{
throw new ArgumentNullException("session_type");
}
Debug.Assert(Array.IndexOf(provider.Protocol.Args.SignatureAlgorithm.All, assoc_type) >= 0);
Debug.Assert(Array.IndexOf(provider.Protocol.Args.SessionType.All, session_type) >= 0);
if (!HmacShaAssociation.IsDHSessionCompatible(provider.Protocol, assoc_type, session_type))
{
throw new OpenIdException(string.Format(CultureInfo.CurrentCulture,
Strings.IncompatibleAssociationAndSessionTypes, assoc_type, session_type));
}
var args = new Dictionary <string, string>();
Protocol protocol = provider.Protocol;
args.Add(protocol.openid.mode, protocol.Args.Mode.associate);
args.Add(protocol.openid.assoc_type, assoc_type);
DiffieHellman dh = null;
if (provider.ProviderEndpoint.Scheme == Uri.UriSchemeHttps && allowNoSession)
{
//Logger.InfoFormat("Requesting association with {0} (assoc_type = '{1}', session_type = '{2}').",
// provider.ProviderEndpoint, assoc_type, protocol.Args.SessionType.NoEncryption);
args.Add(protocol.openid.session_type, protocol.Args.SessionType.NoEncryption);
}
else
{
//Logger.InfoFormat("Requesting association with {0} (assoc_type = '{1}', session_type = '{2}').",
// provider.ProviderEndpoint, assoc_type, session_type);
// Initiate Diffie-Hellman Exchange
dh = DiffieHellmanUtil.CreateDiffieHellman();
byte[] dhPublic = dh.CreateKeyExchange();
string cpub = DiffieHellmanUtil.UnsignedToBase64(dhPublic);
args.Add(protocol.openid.session_type, session_type);
args.Add(protocol.openid.dh_consumer_public, cpub);
DHParameters dhps = dh.ExportParameters(true);
if (dhps.P != DiffieHellmanUtil.DEFAULT_MOD || dhps.G != DiffieHellmanUtil.DEFAULT_GEN)
{
args.Add(protocol.openid.dh_modulus, DiffieHellmanUtil.UnsignedToBase64(dhps.P));
args.Add(protocol.openid.dh_gen, DiffieHellmanUtil.UnsignedToBase64(dhps.G));
}
}
return(new AssociateRequest(relyingParty, provider, args, dh));
}
