/// <summary>
/// Initializes a new instance of the <see cref="ProviderSigningBindingElement"/> class.
/// </summary>
/// <param name="associationStore">The association store used to look up the secrets needed for signing.</param>
/// <param name="securitySettings">The security settings.</param>
internal ProviderSigningBindingElement(IProviderAssociationStore associationStore, ProviderSecuritySettings securitySettings)
{
Requires.NotNull(associationStore, "associationStore");
Requires.NotNull(securitySettings, "securitySettings");
this.opAssociations = associationStore;
this.opSecuritySettings = securitySettings;
}
/// <summary>
/// Creates the association at the provider side after the association request has been received.
/// </summary>
/// <param name="request">The association request.</param>
/// <param name="securitySettings">The security settings of the Provider.</param>
/// <returns>The newly created association.</returns>
/// <remarks>
/// The response message is updated to include the details of the created association by this method,
/// but the resulting association is <i>not</i> added to the association store and must be done by the caller.
/// </remarks>
protected override Association CreateAssociationAtProvider(AssociateRequest request, ProviderSecuritySettings securitySettings)
{
ErrorUtilities.VerifyArgumentNotNull(request, "request");
var diffieHellmanRequest = request as AssociateDiffieHellmanRequest;
ErrorUtilities.VerifyArgument(diffieHellmanRequest != null, "request");
ErrorUtilities.VerifyArgumentNotNull(securitySettings, "securitySettings");
this.SessionType = this.SessionType ?? request.SessionType;
// Go ahead and create the association first, complete with its secret that we're about to share.
Association association = HmacShaAssociation.Create(this.Protocol, this.AssociationType, AssociationRelyingPartyType.Smart, securitySettings);
this.AssociationHandle = association.Handle;
this.ExpiresIn = association.SecondsTillExpiration;
// We now need to securely communicate the secret to the relying party using Diffie-Hellman.
// We do this by performing a DH algorithm on the secret and setting a couple of properties
// that will be transmitted to the Relying Party. The RP will perform an inverse operation
// using its part of a DH secret in order to decrypt the shared secret we just invented
// above when we created the association.
DiffieHellman dh = new DiffieHellmanManaged(
diffieHellmanRequest.DiffieHellmanModulus ?? AssociateDiffieHellmanRequest.DefaultMod,
diffieHellmanRequest.DiffieHellmanGen ?? AssociateDiffieHellmanRequest.DefaultGen,
AssociateDiffieHellmanRequest.DefaultX);
HashAlgorithm hasher = DiffieHellmanUtilities.Lookup(this.Protocol, this.SessionType);
this.DiffieHellmanServerPublic = DiffieHellmanUtilities.EnsurePositive(dh.CreateKeyExchange());
this.EncodedMacKey = DiffieHellmanUtilities.SHAHashXorSecret(hasher, dh, diffieHellmanRequest.DiffieHellmanConsumerPublic, association.SecretKey);
return(association);
}
/// <summary>
/// Initializes a new instance of the SigningBindingElement class for use by a Provider.
/// </summary>
/// <param name="associationStore">The association store used to look up the secrets needed for signing.</param>
/// <param name="securitySettings">The security settings.</param>
internal SigningBindingElement(IAssociationStore <AssociationRelyingPartyType> associationStore, ProviderSecuritySettings securitySettings)
{
ErrorUtilities.VerifyArgumentNotNull(associationStore, "associationStore");
ErrorUtilities.VerifyArgumentNotNull(securitySettings, "securitySettings");
this.opAssociations = associationStore;
this.opSecuritySettings = securitySettings;
}
/// <summary>
/// Applies a well known set of security requirements to a default set of security settings.
/// </summary>
/// <param name="securitySettings">The security settings to enhance with the requirements of this profile.</param>
/// <remarks>
/// Care should be taken to never decrease security when applying a profile.
/// Profiles should only enhance security requirements to avoid being
/// incompatible with each other.
/// </remarks>
void IProviderBehavior.ApplySecuritySettings(ProviderSecuritySettings securitySettings)
{
// No special security to apply here.
}
/// <summary>
/// Called to create the Association based on a request previously given by the Relying Party.
/// </summary>
/// <param name="request">The prior request for an association.</param>
/// <param name="associationStore">The Provider's association store.</param>
/// <param name="securitySettings">The security settings of the Provider.</param>
/// <returns>
/// The created association.
/// </returns>
/// <remarks>
/// <para>The caller will update this message's
/// <see cref="AssociateSuccessfulResponse.ExpiresIn"/> and
/// <see cref="AssociateSuccessfulResponse.AssociationHandle"/>
/// properties based on the <see cref="Association"/> returned by this method, but any other
/// association type specific properties must be set by this method.</para>
/// <para>The response message is updated to include the details of the created association by this method,
/// but the resulting association is <i>not</i> added to the association store and must be done by the caller.</para>
/// </remarks>
public Association CreateAssociationAtProvider(AssociateRequest request, IProviderAssociationStore associationStore, ProviderSecuritySettings securitySettings)
{
Association association = HmacShaAssociationProvider.Create(Protocol, this.AssociationType, AssociationRelyingPartyType.Smart, associationStore, securitySettings);
this.MacKey = association.SecretKey;
return(association);
}
/// <summary>
/// Creates a new association of a given type.
/// </summary>
/// <param name="protocol">The protocol.</param>
/// <param name="associationType">Type of the association (i.e. HMAC-SHA1 or HMAC-SHA256)</param>
/// <param name="associationUse">A value indicating whether the new association will be used privately by the Provider for "dumb mode" authentication
/// or shared with the Relying Party for "smart mode" authentication.</param>
/// <param name="securitySettings">The security settings of the Provider.</param>
/// <returns>The newly created association.</returns>
/// <remarks>
/// The new association is NOT automatically put into an association store. This must be done by the caller.
/// </remarks>
internal static HmacShaAssociation Create(Protocol protocol, string associationType, AssociationRelyingPartyType associationUse, ProviderSecuritySettings securitySettings)
{
Contract.Requires <ArgumentNullException>(protocol != null);
Contract.Requires <ArgumentException>(!String.IsNullOrEmpty(associationType));
Contract.Requires <ArgumentNullException>(securitySettings != null);
Contract.Ensures(Contract.Result <HmacShaAssociation>() != null);
int secretLength = GetSecretLength(protocol, associationType);
// Generate the handle. It must be unique, and preferably unpredictable,
// so we use a time element and a random data element to generate it.
string uniq = MessagingUtilities.GetCryptoRandomDataAsBase64(4);
string handle = string.Format(
CultureInfo.InvariantCulture,
"{{{0}}}{{{1}}}{{{2}}}",
DateTime.UtcNow.Ticks,
uniq,
secretLength);
// Generate the secret that will be used for signing
byte[] secret = MessagingUtilities.GetCryptoRandomData(secretLength);
TimeSpan lifetime;
if (associationUse == AssociationRelyingPartyType.Smart)
{
if (!securitySettings.AssociationLifetimes.TryGetValue(associationType, out lifetime))
{
lifetime = DefaultMaximumLifetime;
}
}
else
{
lifetime = DumbSecretLifetime;
}
Contract.Assert(protocol != null); // All the way up to the method call, the condition holds, yet we get a Requires failure next
Contract.Assert(secret != null);
Contract.Assert(!String.IsNullOrEmpty(associationType));
return(Create(protocol, associationType, handle, secret, lifetime));
}
/// <summary>
/// Initializes a new instance of the <see cref="OpenIdChannel"/> class
/// for use by a Provider.
/// </summary>
/// <param name="associationStore">The association store to use.</param>
/// <param name="nonceStore">The nonce store to use.</param>
/// <param name="messageTypeProvider">An object that knows how to distinguish the various OpenID message types for deserialization purposes.</param>
/// <param name="securitySettings">The security settings.</param>
private OpenIdChannel(IAssociationStore <AssociationRelyingPartyType> associationStore, INonceStore nonceStore, IMessageFactory messageTypeProvider, ProviderSecuritySettings securitySettings) :
this(messageTypeProvider, InitializeBindingElements(associationStore, nonceStore, securitySettings, false))
{
Contract.Requires <ArgumentNullException>(messageTypeProvider != null);
Contract.Requires <ArgumentNullException>(securitySettings != null);
}
/// <summary>
/// Initializes the binding elements.
/// </summary>
/// <param name="cryptoKeyStore">The OpenID Provider's crypto key store.</param>
/// <param name="nonceStore">The nonce store to use.</param>
/// <param name="securitySettings">The security settings to apply. Must be an instance of either RelyingPartySecuritySettings or ProviderSecuritySettings.</param>
/// <returns>
/// An array of binding elements which may be used to construct the channel.
/// </returns>
private static IChannelBindingElement[] InitializeBindingElements(IProviderAssociationStore cryptoKeyStore, INonceStore nonceStore, ProviderSecuritySettings securitySettings)
{
Requires.NotNull(cryptoKeyStore, "cryptoKeyStore");
Requires.NotNull(securitySettings, "securitySettings");
Requires.NotNull(nonceStore, "nonceStore");
SigningBindingElement signingElement;
signingElement = new ProviderSigningBindingElement(cryptoKeyStore, securitySettings);
var extensionFactory = OpenIdExtensionFactoryAggregator.LoadFromConfiguration();
List <IChannelBindingElement> elements = new List <IChannelBindingElement>(8);
elements.Add(new ExtensionsBindingElement(extensionFactory, securitySettings, true));
elements.Add(new StandardReplayProtectionBindingElement(nonceStore, true));
elements.Add(new StandardExpirationBindingElement());
elements.Add(signingElement);
return(elements.ToArray());
}
/// <summary> /// Called to create the Association based on a request previously given by the Relying Party. /// </summary> /// <param name="request">The prior request for an association.</param> /// <param name="securitySettings">The security settings of the Provider.</param> /// <returns>The created association.</returns> /// <remarks> /// <para>The caller will update this message's <see cref="ExpiresIn"/> and <see cref="AssociationHandle"/> /// properties based on the <see cref="Association"/> returned by this method, but any other /// association type specific properties must be set by this method.</para> /// <para>The response message is updated to include the details of the created association by this method, /// but the resulting association is <i>not</i> added to the association store and must be done by the caller.</para> /// </remarks> protected abstract Association CreateAssociationAtProvider(AssociateRequest request, ProviderSecuritySettings securitySettings);
/// <summary>
/// Initializes a new instance of the <see cref="OpenIdProviderChannel"/> class.
/// </summary>
/// <param name="cryptoKeyStore">The OpenID Provider's association store or handle encoder.</param>
/// <param name="nonceStore">The nonce store to use.</param>
/// <param name="securitySettings">The security settings.</param>
internal OpenIdProviderChannel(IProviderAssociationStore cryptoKeyStore, INonceStore nonceStore, ProviderSecuritySettings securitySettings)
: this(cryptoKeyStore, nonceStore, new OpenIdProviderMessageFactory(), securitySettings)
{
Requires.NotNull(cryptoKeyStore, "cryptoKeyStore");
Requires.NotNull(securitySettings, "securitySettings");
}
/// <summary>
/// Initializes a new instance of the <see cref="OpenIdProviderChannel"/> class.
/// </summary>
/// <param name="cryptoKeyStore">The association store to use.</param>
/// <param name="nonceStore">The nonce store to use.</param>
/// <param name="messageTypeProvider">An object that knows how to distinguish the various OpenID message types for deserialization purposes.</param>
/// <param name="securitySettings">The security settings.</param>
private OpenIdProviderChannel(IProviderAssociationStore cryptoKeyStore, INonceStore nonceStore, IMessageFactory messageTypeProvider, ProviderSecuritySettings securitySettings)
: base(messageTypeProvider, InitializeBindingElements(cryptoKeyStore, nonceStore, securitySettings))
{
Requires.NotNull(cryptoKeyStore, "cryptoKeyStore");
Requires.NotNull(messageTypeProvider, "messageTypeProvider");
Requires.NotNull(securitySettings, "securitySettings");
}
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>
/// Creates a response that notifies the Relying Party that the requested
/// association type is not supported by this Provider, and offers
/// an alternative association type, if possible.
/// </summary>
/// <param name="requestMessage">The request message.</param>
/// <param name="securitySettings">The security settings that apply to this Provider.</param>
/// <returns>
/// The response to send to the Relying Party.
/// </returns>
private static AssociateUnsuccessfulResponse CreateUnsuccessfulResponse(IAssociateRequestProvider requestMessage, ProviderSecuritySettings securitySettings)
{
Requires.NotNull(requestMessage, "requestMessage");
Requires.NotNull(securitySettings, "securitySettings");
var unsuccessfulResponse = new AssociateUnsuccessfulResponse(requestMessage.Version, (AssociateRequest)requestMessage);
// The strategy here is to suggest that the RP try again with the lowest
// permissible security settings, giving the RP the best chance of being
// able to match with a compatible request.
bool unencryptedAllowed = requestMessage.Recipient.IsTransportSecure();
bool useDiffieHellman = !unencryptedAllowed;
var request = (AssociateRequest)requestMessage;
var protocol = requestMessage.GetProtocol();
string associationType, sessionType;
if (HmacShaAssociation.TryFindBestAssociation(protocol, false, securitySettings, useDiffieHellman, out associationType, out sessionType))
{
ErrorUtilities.VerifyInternal(request.AssociationType != associationType, "The RP asked for an association that should have been allowed, but the OP is trying to suggest the same one as an alternative!");
unsuccessfulResponse.AssociationType = associationType;
unsuccessfulResponse.SessionType = sessionType;
Logger.OpenId.InfoFormat(
"Association requested of type '{0}' and session '{1}', which the Provider does not support. Sending back suggested alternative of '{0}' with session '{1}'.",
request.AssociationType,
request.SessionType,
unsuccessfulResponse.AssociationType,
unsuccessfulResponse.SessionType);
}
else
{
Logger.OpenId.InfoFormat("Association requested of type '{0}' and session '{1}', which the Provider does not support. No alternative association type qualified for suggesting back to the Relying Party.", request.AssociationType, request.SessionType);
}
return(unsuccessfulResponse);
}
/// <summary>
/// Creates a Provider's response to an incoming association request.
/// </summary>
/// <param name="requestMessage">The request message.</param>
/// <param name="associationStore">The association store.</param>
/// <param name="securitySettings">The security settings on the Provider.</param>
/// <returns>
/// The appropriate association response that is ready to be sent back to the Relying Party.
/// </returns>
/// <remarks>
/// <para>If an association is created, it will be automatically be added to the provided
/// association store.</para>
/// <para>Successful association response messages will derive from <see cref="AssociateSuccessfulResponse"/>.
/// Failed association response messages will derive from <see cref="AssociateUnsuccessfulResponse"/>.</para>
/// </remarks>
internal static IProtocolMessage CreateResponse(IAssociateRequestProvider requestMessage, IProviderAssociationStore associationStore, ProviderSecuritySettings securitySettings)
{
Requires.NotNull(requestMessage, "requestMessage");
Requires.NotNull(associationStore, "associationStore");
Requires.NotNull(securitySettings, "securitySettings");
AssociateRequest request = (AssociateRequest)requestMessage;
IProtocolMessage response;
var protocol = requestMessage.GetProtocol();
if (securitySettings.IsAssociationInPermittedRange(protocol, request.AssociationType) &&
HmacShaAssociation.IsDHSessionCompatible(protocol, request.AssociationType, request.SessionType))
{
response = requestMessage.CreateResponseCore();
// Create and store the association if this is a successful response.
var successResponse = response as IAssociateSuccessfulResponseProvider;
if (successResponse != null)
{
OpenIdProviderUtilities.CreateAssociation(request, successResponse, associationStore, securitySettings);
}
}
else
{
response = CreateUnsuccessfulResponse(requestMessage, securitySettings);
}
return(response);
}
/// <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>
/// Applies a well known set of security requirements to a default set of security settings.
/// </summary>
/// <param name="securitySettings">The security settings to enhance with the requirements of this profile.</param>
/// <remarks>
/// Care should be taken to never decrease security when applying a profile.
/// Profiles should only enhance security requirements to avoid being
/// incompatible with each other.
/// </remarks>
void IProviderBehavior.ApplySecuritySettings(ProviderSecuritySettings securitySettings)
{
// Nothing to do here.
}
/// <summary>
/// Called to create the Association based on a request previously given by the Relying Party.
/// </summary>
/// <param name="request">The prior request for an association.</param>
/// <param name="associationStore">The Provider's association store.</param>
/// <param name="securitySettings">The security settings of the Provider.</param>
/// <returns>
/// The created association.
/// </returns>
Association IAssociateSuccessfulResponseProvider.CreateAssociationAtProvider(AssociateRequest request, IProviderAssociationStore associationStore, ProviderSecuritySettings securitySettings)
{
Requires.NotNull(request, "request");
Requires.NotNull(associationStore, "associationStore");
Requires.NotNull(securitySettings, "securitySettings");
throw new NotImplementedException();
}
/// <summary>
/// Ensures the maximum association lifetime does not exceed a given limit.
/// </summary>
/// <param name="associationType">Type of the association.</param>
/// <param name="maximumLifetime">The maximum lifetime.</param>
/// <param name="securitySettings">The security settings to adjust.</param>
private static void SetMaximumAssociationLifetimeToNotExceed(string associationType, TimeSpan maximumLifetime, ProviderSecuritySettings securitySettings)
{
Requires.NotNullOrEmpty(associationType, "associationType");
Requires.That(maximumLifetime.TotalSeconds > 0, "maximumLifetime", "requires positive timespan");
if (!securitySettings.AssociationLifetimes.ContainsKey(associationType) ||
securitySettings.AssociationLifetimes[associationType] > maximumLifetime)
{
securitySettings.AssociationLifetimes[associationType] = maximumLifetime;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="OpenIdChannel"/> class
/// for use by a Provider.
/// </summary>
/// <param name="associationStore">The association store to use.</param>
/// <param name="nonceStore">The nonce store to use.</param>
/// <param name="securitySettings">The security settings.</param>
internal OpenIdChannel(IAssociationStore <AssociationRelyingPartyType> associationStore, INonceStore nonceStore, ProviderSecuritySettings securitySettings)
: this(associationStore, nonceStore, new OpenIdMessageFactory(), securitySettings)
{
Contract.Requires <ArgumentNullException>(securitySettings != null);
}
/// <summary>
/// Initializes a new instance of the <see cref="OpenIdChannel"/> class
/// for use by a Provider.
/// </summary>
/// <param name="associationStore">The association store to use.</param>
/// <param name="nonceStore">The nonce store to use.</param>
/// <param name="securitySettings">The security settings.</param>
internal OpenIdChannel(IAssociationStore <AssociationRelyingPartyType> associationStore, INonceStore nonceStore, ProviderSecuritySettings securitySettings)
: this(associationStore, nonceStore, new OpenIdMessageFactory(), securitySettings)
{
}
/// <summary>
/// Ensures the maximum association lifetime does not exceed a given limit.
/// </summary>
/// <param name="associationType">Type of the association.</param>
/// <param name="maximumLifetime">The maximum lifetime.</param>
/// <param name="securitySettings">The security settings to adjust.</param>
private static void SetMaximumAssociationLifetimeToNotExceed(string associationType, TimeSpan maximumLifetime, ProviderSecuritySettings securitySettings)
{
Contract.Requires(!string.IsNullOrEmpty(associationType));
Contract.Requires(maximumLifetime.TotalSeconds > 0);
if (!securitySettings.AssociationLifetimes.ContainsKey(associationType) ||
securitySettings.AssociationLifetimes[associationType] > maximumLifetime)
{
securitySettings.AssociationLifetimes[associationType] = maximumLifetime;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="OpenIdChannel"/> class
/// for use by a Provider.
/// </summary>
/// <param name="associationStore">The association store to use.</param>
/// <param name="nonceStore">The nonce store to use.</param>
/// <param name="messageTypeProvider">An object that knows how to distinguish the various OpenID message types for deserialization purposes.</param>
/// <param name="securitySettings">The security settings.</param>
private OpenIdChannel(IAssociationStore <AssociationRelyingPartyType> associationStore, INonceStore nonceStore, IMessageFactory messageTypeProvider, ProviderSecuritySettings securitySettings) :
this(messageTypeProvider, InitializeBindingElements(associationStore, nonceStore, securitySettings))
{
}
/// <summary>
/// Initializes a new instance of the SigningBindingElement class for use by a Provider.
/// </summary>
/// <param name="associationStore">The association store used to look up the secrets needed for signing.</param>
/// <param name="securitySettings">The security settings.</param>
internal SigningBindingElement(IAssociationStore <AssociationRelyingPartyType> associationStore, ProviderSecuritySettings securitySettings)
{
Contract.Requires <ArgumentNullException>(associationStore != null);
Contract.Requires <ArgumentNullException>(securitySettings != null);
this.opAssociations = associationStore;
this.opSecuritySettings = securitySettings;
}
private void ParameterizedAuthenticationTest(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;
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();
}
