/// <summary>
/// Analyzes an incoming request message payload to discover what kind of
/// message is embedded in it and returns the type, or null if no match is found.
/// </summary>
/// <param name="recipient">The intended or actual recipient of the request message.</param>
/// <param name="fields">The name/value pairs that make up the message payload.</param>
/// <returns>
/// A newly instantiated <see cref="IProtocolMessage"/>-derived object that this message can
/// deserialize to. Null if the request isn't recognized as a valid protocol message.
/// </returns>
public IDirectedProtocolMessage GetNewRequestMessage(MessageReceivingEndpoint recipient, IDictionary<string, string> fields)
{
ErrorUtilities.VerifyArgumentNotNull(recipient, "recipient");
ErrorUtilities.VerifyArgumentNotNull(fields, "fields");
RequestBase message = null;
// Discern the OpenID version of the message.
Protocol protocol = Protocol.V11;
string ns;
if (fields.TryGetValue(Protocol.V20.openid.ns, out ns)) {
ErrorUtilities.VerifyProtocol(string.Equals(ns, Protocol.OpenId2Namespace, StringComparison.Ordinal), MessagingStrings.UnexpectedMessagePartValue, Protocol.V20.openid.ns, ns);
protocol = Protocol.V20;
}
string mode;
if (fields.TryGetValue(protocol.openid.mode, out mode)) {
if (string.Equals(mode, protocol.Args.Mode.associate)) {
if (fields.ContainsKey(protocol.openid.dh_consumer_public)) {
message = new AssociateDiffieHellmanRequest(protocol.Version, recipient.Location);
} else {
message = new AssociateUnencryptedRequest(protocol.Version, recipient.Location);
}
} else if (string.Equals(mode, protocol.Args.Mode.checkid_setup) ||
string.Equals(mode, protocol.Args.Mode.checkid_immediate)) {
AuthenticationRequestMode authMode = string.Equals(mode, protocol.Args.Mode.checkid_immediate) ? AuthenticationRequestMode.Immediate : AuthenticationRequestMode.Setup;
if (fields.ContainsKey(protocol.openid.identity)) {
message = new CheckIdRequest(protocol.Version, recipient.Location, authMode);
} else {
ErrorUtilities.VerifyProtocol(!fields.ContainsKey(protocol.openid.claimed_id), OpenIdStrings.IdentityAndClaimedIdentifierMustBeBothPresentOrAbsent);
message = new SignedResponseRequest(protocol.Version, recipient.Location, authMode);
}
} else if (string.Equals(mode, protocol.Args.Mode.cancel) ||
(string.Equals(mode, protocol.Args.Mode.setup_needed) && (protocol.Version.Major >= 2 || fields.ContainsKey(protocol.openid.user_setup_url)))) {
message = new NegativeAssertionResponse(protocol.Version, recipient.Location, mode);
} else if (string.Equals(mode, protocol.Args.Mode.id_res)) {
if (fields.ContainsKey(protocol.openid.identity)) {
message = new PositiveAssertionResponse(protocol.Version, recipient.Location);
} else {
ErrorUtilities.VerifyProtocol(!fields.ContainsKey(protocol.openid.claimed_id), OpenIdStrings.IdentityAndClaimedIdentifierMustBeBothPresentOrAbsent);
message = new IndirectSignedResponse(protocol.Version, recipient.Location);
}
} else if (string.Equals(mode, protocol.Args.Mode.check_authentication)) {
message = new CheckAuthenticationRequest(protocol.Version, recipient.Location);
} else if (string.Equals(mode, protocol.Args.Mode.error)) {
message = new IndirectErrorResponse(protocol.Version, recipient.Location);
} else {
ErrorUtilities.ThrowProtocol(MessagingStrings.UnexpectedMessagePartValue, protocol.openid.mode, mode);
}
}
if (message != null) {
message.SetAsIncoming();
}
return message;
}
public override void SetUp() {
base.SetUp();
this.protocol = Protocol.V20;
this.request = new CheckIdRequest(this.protocol.Version, OPUri, AuthenticationRequestMode.Setup);
this.request.ReturnTo = RPUri;
this.response = new PositiveAssertionResponse(this.request);
this.unsolicited = new PositiveAssertionResponse(this.protocol.Version, RPUri);
}
/// <summary>
/// Initializes a new instance of the <see cref="PositiveAuthenticationResponse"/> class
/// </summary>
/// <param name="response">The positive assertion response that was just received by the Relying Party.</param>
/// <param name="relyingParty">The relying party.</param>
private PositiveAuthenticationResponse(PositiveAssertionResponse response, OpenIdRelyingParty relyingParty)
: base(response) {
Requires.NotNull(relyingParty, "relyingParty");
this.Endpoint = IdentifierDiscoveryResult.CreateForClaimedIdentifier(
this.Response.ClaimedIdentifier,
this.Response.GetReturnToArgument(AuthenticationRequest.UserSuppliedIdentifierParameterName),
this.Response.LocalIdentifier,
new ProviderEndpointDescription(this.Response.ProviderEndpoint, this.Response.Version),
null,
null);
Logger.OpenId.InfoFormat("Received identity assertion for {0} via {1}.", this.Response.ClaimedIdentifier, this.Provider.Uri);
}
public void ExactPositiveAssertionPreservation() {
var rp = CreateRelyingParty(true);
// Initialize the positive assertion response with some data that is NOT in normalized form.
var positiveAssertion = new PositiveAssertionResponse(Protocol.Default.Version, RPUri)
{
ClaimedIdentifier = "https://HOST:443/a",
ProviderEndpoint = new Uri("https://anotherHOST:443/b"),
};
var checkAuth = new CheckAuthenticationRequest(positiveAssertion, rp.Channel);
var actual = rp.Channel.MessageDescriptions.GetAccessor(checkAuth);
Assert.AreEqual("https://HOST:443/a", actual["openid.claimed_id"]);
Assert.AreEqual("https://anotherHOST:443/b", actual["openid.op_endpoint"]);
}
/// <summary>
/// Initializes a new instance of the <see cref="PositiveAuthenticationResponse"/> class.
/// </summary>
/// <param name="response">The positive assertion response that was just received by the Relying Party.</param>
/// <param name="relyingParty">The relying party.</param>
internal PositiveAuthenticationResponse(PositiveAssertionResponse response, OpenIdRelyingParty relyingParty)
: base(response)
{
Contract.Requires(relyingParty != null);
ErrorUtilities.VerifyArgumentNotNull(relyingParty, "relyingParty");
this.Endpoint = ServiceEndpoint.CreateForClaimedIdentifier(
this.Response.ClaimedIdentifier,
this.Response.GetReturnToArgument(AuthenticationRequest.UserSuppliedIdentifierParameterName),
this.Response.LocalIdentifier,
new ProviderEndpointDescription(this.Response.ProviderEndpoint, this.Response.Version),
null,
null);
this.VerifyDiscoveryMatchesAssertion(relyingParty);
}
/// <summary>
/// Simulates an extension request and response.
/// </summary>
/// <param name="protocol">The protocol to use in the roundtripping.</param>
/// <param name="requests">The extensions to add to the request message.</param>
/// <param name="responses">The extensions to add to the response message.</param>
/// <remarks>
/// This method relies on the extension objects' Equals methods to verify
/// accurate transport. The Equals methods should be verified by separate tests.
/// </remarks>
internal static void Roundtrip(
Protocol protocol,
IEnumerable<IOpenIdMessageExtension> requests,
IEnumerable<IOpenIdMessageExtension> responses) {
var securitySettings = new ProviderSecuritySettings();
var cryptoKeyStore = new MemoryCryptoKeyStore();
var associationStore = new ProviderAssociationHandleEncoder(cryptoKeyStore);
Association association = HmacShaAssociationProvider.Create(protocol, protocol.Args.SignatureAlgorithm.Best, AssociationRelyingPartyType.Smart, associationStore, securitySettings);
var coordinator = new OpenIdCoordinator(
rp => {
RegisterExtension(rp.Channel, Mocks.MockOpenIdExtension.Factory);
var requestBase = new CheckIdRequest(protocol.Version, OpenIdTestBase.OPUri, AuthenticationRequestMode.Immediate);
OpenIdTestBase.StoreAssociation(rp, OpenIdTestBase.OPUri, association);
requestBase.AssociationHandle = association.Handle;
requestBase.ClaimedIdentifier = "http://claimedid";
requestBase.LocalIdentifier = "http://localid";
requestBase.ReturnTo = OpenIdTestBase.RPUri;
foreach (IOpenIdMessageExtension extension in requests) {
requestBase.Extensions.Add(extension);
}
rp.Channel.Respond(requestBase);
var response = rp.Channel.ReadFromRequest<PositiveAssertionResponse>();
var receivedResponses = response.Extensions.Cast<IOpenIdMessageExtension>();
CollectionAssert<IOpenIdMessageExtension>.AreEquivalentByEquality(responses.ToArray(), receivedResponses.ToArray());
},
op => {
RegisterExtension(op.Channel, Mocks.MockOpenIdExtension.Factory);
var key = cryptoKeyStore.GetCurrentKey(ProviderAssociationHandleEncoder.AssociationHandleEncodingSecretBucket, TimeSpan.FromSeconds(1));
op.CryptoKeyStore.StoreKey(ProviderAssociationHandleEncoder.AssociationHandleEncodingSecretBucket, key.Key, key.Value);
var request = op.Channel.ReadFromRequest<CheckIdRequest>();
var response = new PositiveAssertionResponse(request);
var receivedRequests = request.Extensions.Cast<IOpenIdMessageExtension>();
CollectionAssert<IOpenIdMessageExtension>.AreEquivalentByEquality(requests.ToArray(), receivedRequests.ToArray());
foreach (var extensionResponse in responses) {
response.Extensions.Add(extensionResponse);
}
op.Channel.Respond(response);
});
coordinator.Run();
}
/// <summary>
/// Initializes a new instance of the <see cref="AuthenticationRequest"/> class.
/// </summary>
/// <param name="provider">The provider that received the request.</param>
/// <param name="request">The incoming authentication request message.</param>
internal AuthenticationRequest(OpenIdProvider provider, CheckIdRequest request)
: base(provider, request) {
Requires.NotNull(provider, "provider");
this.positiveResponse = new PositiveAssertionResponse(request);
if (this.ClaimedIdentifier == Protocol.ClaimedIdentifierForOPIdentifier &&
Protocol.ClaimedIdentifierForOPIdentifier != null) {
// Force the hosting OP to deal with identifier_select by nulling out the two identifiers.
this.IsDirectedIdentity = true;
this.positiveResponse.ClaimedIdentifier = null;
this.positiveResponse.LocalIdentifier = null;
}
// URL delegation is only detectable from 2.0 RPs, since openid.claimed_id isn't included from 1.0 RPs.
// If the openid.claimed_id is present, and if it's different than the openid.identity argument, then
// the RP has discovered a claimed identifier that has delegated authentication to this Provider.
this.IsDelegatedIdentifier = this.ClaimedIdentifier != null && this.ClaimedIdentifier != this.LocalIdentifier;
Reporting.RecordEventOccurrence("AuthenticationRequest.IsDelegatedIdentifier", this.IsDelegatedIdentifier.ToString());
}
/// <summary>
/// Simulates an extension request and response.
/// </summary>
/// <param name="protocol">The protocol to use in the roundtripping.</param>
/// <param name="requests">The extensions to add to the request message.</param>
/// <param name="responses">The extensions to add to the response message.</param>
/// <remarks>
/// This method relies on the extension objects' Equals methods to verify
/// accurate transport. The Equals methods should be verified by separate tests.
/// </remarks>
internal async Task RoundtripAsync(
Protocol protocol, IEnumerable<IOpenIdMessageExtension> requests, IEnumerable<IOpenIdMessageExtension> responses) {
var securitySettings = new ProviderSecuritySettings();
var cryptoKeyStore = new MemoryCryptoKeyStore();
var associationStore = new ProviderAssociationHandleEncoder(cryptoKeyStore);
Association association = HmacShaAssociationProvider.Create(
protocol,
protocol.Args.SignatureAlgorithm.Best,
AssociationRelyingPartyType.Smart,
associationStore,
securitySettings);
this.HandleProvider(
async (op, req) => {
ExtensionTestUtilities.RegisterExtension(op.Channel, Mocks.MockOpenIdExtension.Factory);
var key = cryptoKeyStore.GetCurrentKey(
ProviderAssociationHandleEncoder.AssociationHandleEncodingSecretBucket, TimeSpan.FromSeconds(1));
op.CryptoKeyStore.StoreKey(
ProviderAssociationHandleEncoder.AssociationHandleEncodingSecretBucket, key.Key, key.Value);
var request = await op.Channel.ReadFromRequestAsync<CheckIdRequest>(req, CancellationToken.None);
var response = new PositiveAssertionResponse(request);
var receivedRequests = request.Extensions.Cast<IOpenIdMessageExtension>();
CollectionAssert<IOpenIdMessageExtension>.AreEquivalentByEquality(requests.ToArray(), receivedRequests.ToArray());
foreach (var extensionResponse in responses) {
response.Extensions.Add(extensionResponse);
}
return await op.Channel.PrepareResponseAsync(response);
});
{
var rp = this.CreateRelyingParty();
ExtensionTestUtilities.RegisterExtension(rp.Channel, Mocks.MockOpenIdExtension.Factory);
var requestBase = new CheckIdRequest(protocol.Version, OpenIdTestBase.OPUri, AuthenticationRequestMode.Immediate);
OpenIdTestBase.StoreAssociation(rp, OpenIdTestBase.OPUri, association);
requestBase.AssociationHandle = association.Handle;
requestBase.ClaimedIdentifier = "http://claimedid";
requestBase.LocalIdentifier = "http://localid";
requestBase.ReturnTo = OpenIdTestBase.RPUri;
foreach (IOpenIdMessageExtension extension in requests) {
requestBase.Extensions.Add(extension);
}
var redirectingRequest = await rp.Channel.PrepareResponseAsync(requestBase);
Uri redirectingResponseUri;
this.HostFactories.AllowAutoRedirects = false;
using (var httpClient = rp.Channel.HostFactories.CreateHttpClient()) {
using (var redirectingResponse = await httpClient.GetAsync(redirectingRequest.Headers.Location)) {
Assert.AreEqual(HttpStatusCode.Found, redirectingResponse.StatusCode);
redirectingResponseUri = redirectingResponse.Headers.Location;
}
}
var response =
await
rp.Channel.ReadFromRequestAsync<PositiveAssertionResponse>(
new HttpRequestMessage(HttpMethod.Get, redirectingResponseUri), CancellationToken.None);
var receivedResponses = response.Extensions.Cast<IOpenIdMessageExtension>();
CollectionAssert<IOpenIdMessageExtension>.AreEquivalentByEquality(responses.ToArray(), receivedResponses.ToArray());
}
}
/// <summary>
/// Prepares an identity assertion on behalf of one of this Provider's
/// members in order to redirect the user agent to a relying party
/// web site and log him/her in immediately in one uninterrupted step.
/// </summary>
/// <param name="providerEndpoint">The absolute URL on the Provider site that receives OpenID messages.</param>
/// <param name="relyingPartyRealm">The URL of the Relying Party web site.
/// This will typically be the home page, but may be a longer URL if
/// that Relying Party considers the scope of its realm to be more specific.
/// The URL provided here must allow discovery of the Relying Party's
/// XRDS document that advertises its OpenID RP endpoint.</param>
/// <param name="claimedIdentifier">The Identifier you are asserting your member controls.</param>
/// <param name="localIdentifier">The Identifier you know your user by internally. This will typically
/// be the same as <paramref name="claimedIdentifier"/>.</param>
/// <param name="extensions">The extensions.</param>
/// <returns>
/// A <see cref="OutgoingWebResponse"/> object describing the HTTP response to send
/// the user agent to allow the redirect with assertion to happen.
/// </returns>
public OutgoingWebResponse PrepareUnsolicitedAssertion(Uri providerEndpoint, Realm relyingPartyRealm, Identifier claimedIdentifier, Identifier localIdentifier, params IExtensionMessage[] extensions) {
Contract.Requires<ArgumentNullException>(providerEndpoint != null);
Contract.Requires<ArgumentException>(providerEndpoint.IsAbsoluteUri);
Contract.Requires<ArgumentNullException>(relyingPartyRealm != null);
Contract.Requires<ArgumentNullException>(claimedIdentifier != null);
Contract.Requires<ArgumentNullException>(localIdentifier != null);
Contract.Requires<InvalidOperationException>(this.Channel.WebRequestHandler != null);
// Although the RP should do their due diligence to make sure that this OP
// is authorized to send an assertion for the given claimed identifier,
// do due diligence by performing our own discovery on the claimed identifier
// and make sure that it is tied to this OP and OP local identifier.
if (this.SecuritySettings.UnsolicitedAssertionVerification != ProviderSecuritySettings.UnsolicitedAssertionVerificationLevel.NeverVerify) {
var serviceEndpoint = IdentifierDiscoveryResult.CreateForClaimedIdentifier(claimedIdentifier, localIdentifier, new ProviderEndpointDescription(providerEndpoint, Protocol.Default.Version), null, null);
var discoveredEndpoints = this.RelyingParty.Discover(claimedIdentifier);
if (!discoveredEndpoints.Contains(serviceEndpoint)) {
Logger.OpenId.WarnFormat(
"Failed to send unsolicited assertion for {0} because its discovered services did not include this endpoint: {1}{2}{1}Discovered endpoints: {1}{3}",
claimedIdentifier,
Environment.NewLine,
serviceEndpoint,
discoveredEndpoints.ToStringDeferred(true));
// Only FAIL if the setting is set for it.
if (this.securitySettings.UnsolicitedAssertionVerification == ProviderSecuritySettings.UnsolicitedAssertionVerificationLevel.RequireSuccess) {
ErrorUtilities.ThrowProtocol(OpenIdStrings.UnsolicitedAssertionForUnrelatedClaimedIdentifier, claimedIdentifier);
}
}
}
Logger.OpenId.InfoFormat("Preparing unsolicited assertion for {0}", claimedIdentifier);
RelyingPartyEndpointDescription returnToEndpoint = null;
var returnToEndpoints = relyingPartyRealm.DiscoverReturnToEndpoints(this.WebRequestHandler, true);
if (returnToEndpoints != null) {
returnToEndpoint = returnToEndpoints.FirstOrDefault();
}
ErrorUtilities.VerifyProtocol(returnToEndpoint != null, OpenIdStrings.NoRelyingPartyEndpointDiscovered, relyingPartyRealm);
var positiveAssertion = new PositiveAssertionResponse(returnToEndpoint) {
ProviderEndpoint = providerEndpoint,
ClaimedIdentifier = claimedIdentifier,
LocalIdentifier = localIdentifier,
};
if (extensions != null) {
foreach (IExtensionMessage extension in extensions) {
positiveAssertion.Extensions.Add(extension);
}
}
Reporting.RecordEventOccurrence(this, "PrepareUnsolicitedAssertion");
return this.Channel.PrepareResponse(positiveAssertion);
}
private void ParameterizedAuthenticationTest(Protocol protocol, bool statelessRP, bool sharedAssociation, bool positive, bool immediate, bool tamper) {
Contract.Requires<ArgumentException>(!statelessRP || !sharedAssociation, "The RP cannot be stateless while sharing an association with the OP.");
Contract.Requires<ArgumentException>(positive || !tamper, "Cannot tamper with a negative response.");
var securitySettings = new ProviderSecuritySettings();
var cryptoKeyStore = new MemoryCryptoKeyStore();
var associationStore = new ProviderAssociationHandleEncoder(cryptoKeyStore);
Association association = sharedAssociation ? HmacShaAssociation.Create(protocol, protocol.Args.SignatureAlgorithm.Best, AssociationRelyingPartyType.Smart, associationStore, securitySettings) : null;
var coordinator = new OpenIdCoordinator(
rp => {
var request = new CheckIdRequest(protocol.Version, OPUri, immediate ? AuthenticationRequestMode.Immediate : AuthenticationRequestMode.Setup);
if (association != null) {
StoreAssociation(rp, OPUri, association);
request.AssociationHandle = association.Handle;
}
request.ClaimedIdentifier = "http://claimedid";
request.LocalIdentifier = "http://localid";
request.ReturnTo = RPUri;
request.Realm = RPUri;
rp.Channel.Respond(request);
if (positive) {
if (tamper) {
try {
rp.Channel.ReadFromRequest<PositiveAssertionResponse>();
Assert.Fail("Expected exception {0} not thrown.", typeof(InvalidSignatureException).Name);
} catch (InvalidSignatureException) {
TestLogger.InfoFormat("Caught expected {0} exception after tampering with signed data.", typeof(InvalidSignatureException).Name);
}
} else {
var response = rp.Channel.ReadFromRequest<PositiveAssertionResponse>();
Assert.IsNotNull(response);
Assert.AreEqual(request.ClaimedIdentifier, response.ClaimedIdentifier);
Assert.AreEqual(request.LocalIdentifier, response.LocalIdentifier);
Assert.AreEqual(request.ReturnTo, response.ReturnTo);
// Attempt to replay the message and verify that it fails.
// Because in various scenarios and protocol versions different components
// notice the replay, we can get one of two exceptions thrown.
// When the OP notices the replay we get a generic InvalidSignatureException.
// When the RP notices the replay we get a specific ReplayMessageException.
try {
CoordinatingChannel channel = (CoordinatingChannel)rp.Channel;
channel.Replay(response);
Assert.Fail("Expected ProtocolException was not thrown.");
} catch (ProtocolException ex) {
Assert.IsTrue(ex is ReplayedMessageException || ex is InvalidSignatureException, "A {0} exception was thrown instead of the expected {1} or {2}.", ex.GetType(), typeof(ReplayedMessageException).Name, typeof(InvalidSignatureException).Name);
}
}
} else {
var response = rp.Channel.ReadFromRequest<NegativeAssertionResponse>();
Assert.IsNotNull(response);
if (immediate) {
// Only 1.1 was required to include user_setup_url
if (protocol.Version.Major < 2) {
Assert.IsNotNull(response.UserSetupUrl);
}
} else {
Assert.IsNull(response.UserSetupUrl);
}
}
},
op => {
if (association != null) {
var key = cryptoKeyStore.GetCurrentKey(ProviderAssociationHandleEncoder.AssociationHandleEncodingSecretBucket, TimeSpan.FromSeconds(1));
op.CryptoKeyStore.StoreKey(ProviderAssociationHandleEncoder.AssociationHandleEncodingSecretBucket, key.Key, key.Value);
}
var request = op.Channel.ReadFromRequest<CheckIdRequest>();
Assert.IsNotNull(request);
IProtocolMessage response;
if (positive) {
response = new PositiveAssertionResponse(request);
} else {
response = new NegativeAssertionResponse(request, op.Channel);
}
op.Channel.Respond(response);
if (positive && (statelessRP || !sharedAssociation)) {
var checkauthRequest = op.Channel.ReadFromRequest<CheckAuthenticationRequest>();
var checkauthResponse = new CheckAuthenticationResponse(checkauthRequest.Version, checkauthRequest);
checkauthResponse.IsValid = checkauthRequest.IsValid;
op.Channel.Respond(checkauthResponse);
if (!tamper) {
// Respond to the replay attack.
checkauthRequest = op.Channel.ReadFromRequest<CheckAuthenticationRequest>();
checkauthResponse = new CheckAuthenticationResponse(checkauthRequest.Version, checkauthRequest);
checkauthResponse.IsValid = checkauthRequest.IsValid;
op.Channel.Respond(checkauthResponse);
}
}
});
if (tamper) {
coordinator.IncomingMessageFilter = message => {
var assertion = message as PositiveAssertionResponse;
if (assertion != null) {
// Alter the Local Identifier between the Provider and the Relying Party.
// If the signature binding element does its job, this should cause the RP
// to throw.
assertion.LocalIdentifier = "http://victim";
}
};
}
if (statelessRP) {
coordinator.RelyingParty = new OpenIdRelyingParty(null);
}
coordinator.Run();
}
private PositiveAssertionResponse GetPositiveAssertion(bool dualIdentifier) {
Protocol protocol = Protocol.Default;
PositiveAssertionResponse assertion = new PositiveAssertionResponse(protocol.Version, this.returnTo);
assertion.ClaimedIdentifier = dualIdentifier ? this.GetMockDualIdentifier() : this.GetMockIdentifier(protocol.ProtocolVersion, false);
assertion.LocalIdentifier = OPLocalIdentifiers[0];
assertion.ReturnTo = this.returnTo;
assertion.ProviderEndpoint = OPUri;
return assertion;
}
private async Task ParameterizedAuthenticationTestAsync(Protocol protocol, bool statelessRP, bool sharedAssociation, bool positive, bool immediate, bool tamper) {
Requires.That(!statelessRP || !sharedAssociation, null, "The RP cannot be stateless while sharing an association with the OP.");
Requires.That(positive || !tamper, null, "Cannot tamper with a negative response.");
var securitySettings = new ProviderSecuritySettings();
var cryptoKeyStore = new MemoryCryptoKeyStore();
var associationStore = new ProviderAssociationHandleEncoder(cryptoKeyStore);
Association association = sharedAssociation ? HmacShaAssociationProvider.Create(protocol, protocol.Args.SignatureAlgorithm.Best, AssociationRelyingPartyType.Smart, associationStore, securitySettings) : null;
int opStep = 0;
HandleProvider(
async (op, req) => {
if (association != null) {
var key = cryptoKeyStore.GetCurrentKey(
ProviderAssociationHandleEncoder.AssociationHandleEncodingSecretBucket, TimeSpan.FromSeconds(1));
op.CryptoKeyStore.StoreKey(
ProviderAssociationHandleEncoder.AssociationHandleEncodingSecretBucket, key.Key, key.Value);
}
switch (++opStep) {
case 1:
var request = await op.Channel.ReadFromRequestAsync<CheckIdRequest>(req, CancellationToken.None);
Assert.IsNotNull(request);
IProtocolMessage response;
if (positive) {
response = new PositiveAssertionResponse(request);
} else {
response = await NegativeAssertionResponse.CreateAsync(request, CancellationToken.None, op.Channel);
}
return await op.Channel.PrepareResponseAsync(response);
case 2:
if (positive && (statelessRP || !sharedAssociation)) {
var checkauthRequest =
await op.Channel.ReadFromRequestAsync<CheckAuthenticationRequest>(req, CancellationToken.None);
var checkauthResponse = new CheckAuthenticationResponse(checkauthRequest.Version, checkauthRequest);
checkauthResponse.IsValid = checkauthRequest.IsValid;
return await op.Channel.PrepareResponseAsync(checkauthResponse);
}
throw Assumes.NotReachable();
case 3:
if (positive && (statelessRP || !sharedAssociation)) {
if (!tamper) {
// Respond to the replay attack.
var checkauthRequest =
await op.Channel.ReadFromRequestAsync<CheckAuthenticationRequest>(req, CancellationToken.None);
var checkauthResponse = new CheckAuthenticationResponse(checkauthRequest.Version, checkauthRequest);
checkauthResponse.IsValid = checkauthRequest.IsValid;
return await op.Channel.PrepareResponseAsync(checkauthResponse);
}
}
throw Assumes.NotReachable();
default:
throw Assumes.NotReachable();
}
});
{
var rp = this.CreateRelyingParty(statelessRP);
if (tamper) {
rp.Channel.IncomingMessageFilter = message => {
var assertion = message as PositiveAssertionResponse;
if (assertion != null) {
// Alter the Local Identifier between the Provider and the Relying Party.
// If the signature binding element does its job, this should cause the RP
// to throw.
assertion.LocalIdentifier = "http://victim";
}
};
}
var request = new CheckIdRequest(
protocol.Version, OPUri, immediate ? AuthenticationRequestMode.Immediate : AuthenticationRequestMode.Setup);
if (association != null) {
StoreAssociation(rp, OPUri, association);
request.AssociationHandle = association.Handle;
}
request.ClaimedIdentifier = "http://claimedid";
request.LocalIdentifier = "http://localid";
request.ReturnTo = RPUri;
request.Realm = RPUri;
var redirectRequest = await rp.Channel.PrepareResponseAsync(request);
Uri redirectResponse;
this.HostFactories.AllowAutoRedirects = false;
using (var httpClient = rp.Channel.HostFactories.CreateHttpClient()) {
using (var response = await httpClient.GetAsync(redirectRequest.Headers.Location)) {
Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.Redirect));
redirectResponse = response.Headers.Location;
}
}
var assertionMessage = new HttpRequestMessage(HttpMethod.Get, redirectResponse);
if (positive) {
if (tamper) {
try {
await rp.Channel.ReadFromRequestAsync<PositiveAssertionResponse>(assertionMessage, CancellationToken.None);
Assert.Fail("Expected exception {0} not thrown.", typeof(InvalidSignatureException).Name);
} catch (InvalidSignatureException) {
TestLogger.InfoFormat(
"Caught expected {0} exception after tampering with signed data.", typeof(InvalidSignatureException).Name);
}
} else {
var response =
await rp.Channel.ReadFromRequestAsync<PositiveAssertionResponse>(assertionMessage, CancellationToken.None);
Assert.IsNotNull(response);
Assert.AreEqual(request.ClaimedIdentifier, response.ClaimedIdentifier);
Assert.AreEqual(request.LocalIdentifier, response.LocalIdentifier);
Assert.AreEqual(request.ReturnTo, response.ReturnTo);
// Attempt to replay the message and verify that it fails.
// Because in various scenarios and protocol versions different components
// notice the replay, we can get one of two exceptions thrown.
// When the OP notices the replay we get a generic InvalidSignatureException.
// When the RP notices the replay we get a specific ReplayMessageException.
try {
await rp.Channel.ReadFromRequestAsync<PositiveAssertionResponse>(assertionMessage, CancellationToken.None);
Assert.Fail("Expected ProtocolException was not thrown.");
} catch (ProtocolException ex) {
Assert.IsTrue(
ex is ReplayedMessageException || ex is InvalidSignatureException,
"A {0} exception was thrown instead of the expected {1} or {2}.",
ex.GetType(),
typeof(ReplayedMessageException).Name,
typeof(InvalidSignatureException).Name);
}
}
} else {
var response =
await rp.Channel.ReadFromRequestAsync<NegativeAssertionResponse>(assertionMessage, CancellationToken.None);
Assert.IsNotNull(response);
if (immediate) {
// Only 1.1 was required to include user_setup_url
if (protocol.Version.Major < 2) {
Assert.IsNotNull(response.UserSetupUrl);
}
} else {
Assert.IsNull(response.UserSetupUrl);
}
}
}
}
/// <summary>
/// Prepares an identity assertion on behalf of one of this Provider's
/// members in order to redirect the user agent to a relying party
/// web site and log him/her in immediately in one uninterrupted step.
/// </summary>
/// <param name="providerEndpoint">The absolute URL on the Provider site that receives OpenID messages.</param>
/// <param name="relyingParty">The URL of the Relying Party web site.
/// This will typically be the home page, but may be a longer URL if
/// that Relying Party considers the scope of its realm to be more specific.
/// The URL provided here must allow discovery of the Relying Party's
/// XRDS document that advertises its OpenID RP endpoint.</param>
/// <param name="claimedIdentifier">The Identifier you are asserting your member controls.</param>
/// <param name="localIdentifier">The Identifier you know your user by internally. This will typically
/// be the same as <paramref name="claimedIdentifier"/>.</param>
/// <param name="extensions">The extensions.</param>
/// <returns>
/// A <see cref="OutgoingWebResponse"/> object describing the HTTP response to send
/// the user agent to allow the redirect with assertion to happen.
/// </returns>
public OutgoingWebResponse PrepareUnsolicitedAssertion(Uri providerEndpoint, Realm relyingParty, Identifier claimedIdentifier, Identifier localIdentifier, params IExtensionMessage[] extensions)
{
Contract.Requires(providerEndpoint != null);
Contract.Requires(providerEndpoint.IsAbsoluteUri);
Contract.Requires(relyingParty != null);
Contract.Requires(claimedIdentifier != null);
Contract.Requires(localIdentifier != null);
ErrorUtilities.VerifyArgumentNotNull(providerEndpoint, "providerEndpoint");
ErrorUtilities.VerifyArgumentNotNull(relyingParty, "relyingParty");
ErrorUtilities.VerifyArgumentNotNull(claimedIdentifier, "claimedIdentifier");
ErrorUtilities.VerifyArgumentNotNull(localIdentifier, "localIdentifier");
ErrorUtilities.VerifyArgumentNamed(providerEndpoint.IsAbsoluteUri, "providerEndpoint", OpenIdStrings.AbsoluteUriRequired);
// Although the RP should do their due diligence to make sure that this OP
// is authorized to send an assertion for the given claimed identifier,
// do due diligence by performing our own discovery on the claimed identifier
// and make sure that it is tied to this OP and OP local identifier.
var serviceEndpoint = DotNetOpenAuth.OpenId.RelyingParty.ServiceEndpoint.CreateForClaimedIdentifier(claimedIdentifier, localIdentifier, new ProviderEndpointDescription(providerEndpoint, Protocol.Default.Version), null, null);
var discoveredEndpoints = claimedIdentifier.Discover(this.WebRequestHandler);
if (!discoveredEndpoints.Contains(serviceEndpoint)) {
Logger.OpenId.DebugFormat(
"Failed to send unsolicited assertion for {0} because its discovered services did not include this endpoint: {1}{2}{1}Discovered endpoints: {1}{3}",
claimedIdentifier,
Environment.NewLine,
serviceEndpoint,
discoveredEndpoints.ToStringDeferred(true));
ErrorUtilities.ThrowProtocol(OpenIdStrings.UnsolicitedAssertionForUnrelatedClaimedIdentifier, claimedIdentifier);
}
Logger.OpenId.InfoFormat("Preparing unsolicited assertion for {0}", claimedIdentifier);
RelyingPartyEndpointDescription returnToEndpoint = null;
var returnToEndpoints = relyingParty.Discover(this.WebRequestHandler, true);
if (returnToEndpoints != null) {
returnToEndpoint = returnToEndpoints.FirstOrDefault();
}
ErrorUtilities.VerifyProtocol(returnToEndpoint != null, OpenIdStrings.NoRelyingPartyEndpointDiscovered, relyingParty);
var positiveAssertion = new PositiveAssertionResponse(returnToEndpoint) {
ProviderEndpoint = providerEndpoint,
ClaimedIdentifier = claimedIdentifier,
LocalIdentifier = localIdentifier,
};
if (extensions != null) {
foreach (IExtensionMessage extension in extensions) {
positiveAssertion.Extensions.Add(extension);
}
}
return this.Channel.PrepareResponse(positiveAssertion);
}
/// <summary>
/// Initializes a new instance of the <see cref="PositiveAuthenticationResponse"/> class
/// after verifying that discovery on the identifier matches the asserted data.
/// </summary>
/// <param name="response">The response.</param>
/// <param name="relyingParty">The relying party.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>The newly initialized instance.</returns>
internal static async Task<PositiveAuthenticationResponse> CreateAsync(
PositiveAssertionResponse response, OpenIdRelyingParty relyingParty, CancellationToken cancellationToken) {
var result = new PositiveAuthenticationResponse(response, relyingParty);
await result.VerifyDiscoveryMatchesAssertionAsync(relyingParty, cancellationToken);
return result;
}
/// <summary>
/// Prepares an identity assertion on behalf of one of this Provider's
/// members in order to redirect the user agent to a relying party
/// web site and log him/her in immediately in one uninterrupted step.
/// </summary>
/// <param name="providerEndpoint">The absolute URL on the Provider site that receives OpenID messages.</param>
/// <param name="relyingPartyRealm">The URL of the Relying Party web site.
/// This will typically be the home page, but may be a longer URL if
/// that Relying Party considers the scope of its realm to be more specific.
/// The URL provided here must allow discovery of the Relying Party's
/// XRDS document that advertises its OpenID RP endpoint.</param>
/// <param name="claimedIdentifier">The Identifier you are asserting your member controls.</param>
/// <param name="localIdentifier">The Identifier you know your user by internally. This will typically
/// be the same as <paramref name="claimedIdentifier" />.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="extensions">The extensions.</param>
/// <returns>
/// A <see cref="HttpResponseMessage" /> object describing the HTTP response to send
/// the user agent to allow the redirect with assertion to happen.
/// </returns>
public async Task<HttpResponseMessage> PrepareUnsolicitedAssertionAsync(Uri providerEndpoint, Realm relyingPartyRealm, Identifier claimedIdentifier, Identifier localIdentifier, CancellationToken cancellationToken = default(CancellationToken), params IExtensionMessage[] extensions) {
Requires.NotNull(providerEndpoint, "providerEndpoint");
Requires.That(providerEndpoint.IsAbsoluteUri, "providerEndpoint", OpenIdStrings.AbsoluteUriRequired);
Requires.NotNull(relyingPartyRealm, "relyingPartyRealm");
Requires.NotNull(claimedIdentifier, "claimedIdentifier");
Requires.NotNull(localIdentifier, "localIdentifier");
RequiresEx.ValidState(this.Channel.HostFactories != null);
// Although the RP should do their due diligence to make sure that this OP
// is authorized to send an assertion for the given claimed identifier,
// do due diligence by performing our own discovery on the claimed identifier
// and make sure that it is tied to this OP and OP local identifier.
if (this.SecuritySettings.UnsolicitedAssertionVerification != ProviderSecuritySettings.UnsolicitedAssertionVerificationLevel.NeverVerify) {
var serviceEndpoint = IdentifierDiscoveryResult.CreateForClaimedIdentifier(claimedIdentifier, localIdentifier, new ProviderEndpointDescription(providerEndpoint, Protocol.Default.Version), null, null);
var discoveredEndpoints = await this.discoveryServices.DiscoverAsync(claimedIdentifier, cancellationToken);
if (!discoveredEndpoints.Contains(serviceEndpoint)) {
Logger.OpenId.WarnFormat(
"Failed to send unsolicited assertion for {0} because its discovered services did not include this endpoint: {1}{2}{1}Discovered endpoints: {1}{3}",
claimedIdentifier,
Environment.NewLine,
serviceEndpoint,
discoveredEndpoints.ToStringDeferred(true));
// Only FAIL if the setting is set for it.
if (this.securitySettings.UnsolicitedAssertionVerification == ProviderSecuritySettings.UnsolicitedAssertionVerificationLevel.RequireSuccess) {
ErrorUtilities.ThrowProtocol(OpenIdStrings.UnsolicitedAssertionForUnrelatedClaimedIdentifier, claimedIdentifier);
}
}
}
Logger.OpenId.InfoFormat("Preparing unsolicited assertion for {0}", claimedIdentifier);
RelyingPartyEndpointDescription returnToEndpoint = null;
var returnToEndpoints = await relyingPartyRealm.DiscoverReturnToEndpointsAsync(this.Channel.HostFactories, true, cancellationToken);
if (returnToEndpoints != null) {
returnToEndpoint = returnToEndpoints.FirstOrDefault();
}
ErrorUtilities.VerifyProtocol(returnToEndpoint != null, OpenIdStrings.NoRelyingPartyEndpointDiscovered, relyingPartyRealm);
var positiveAssertion = new PositiveAssertionResponse(returnToEndpoint) {
ProviderEndpoint = providerEndpoint,
ClaimedIdentifier = claimedIdentifier,
LocalIdentifier = localIdentifier,
};
if (extensions != null) {
foreach (IExtensionMessage extension in extensions) {
positiveAssertion.Extensions.Add(extension);
}
}
Reporting.RecordEventOccurrence(this, "PrepareUnsolicitedAssertion");
return await this.Channel.PrepareResponseAsync(positiveAssertion, cancellationToken);
}