src/edu/internet2/middleware/shibboleth/idp/profile/saml2/SSOProfileHandler.java

   1 /*
   2  * Copyright [2007] [University Corporation for Advanced Internet Development, Inc.]
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package edu.internet2.middleware.shibboleth.idp.profile.saml2;
  18
  19 import java.io.IOException;
  20 import java.util.ArrayList;
  21
  22 import javax.servlet.RequestDispatcher;
  23 import javax.servlet.ServletException;
  24 import javax.servlet.http.HttpServletRequest;
  25 import javax.servlet.http.HttpSession;
  26
  27 import org.opensaml.common.SAMLObjectBuilder;
  28 import org.opensaml.common.binding.decoding.SAMLMessageDecoder;
  29 import org.opensaml.common.xml.SAMLConstants;
  30 import org.opensaml.saml2.binding.AuthnResponseEndpointSelector;
  31 import org.opensaml.saml2.core.AttributeStatement;
  32 import org.opensaml.saml2.core.AuthnContext;
  33 import org.opensaml.saml2.core.AuthnContextClassRef;
  34 import org.opensaml.saml2.core.AuthnContextDeclRef;
  35 import org.opensaml.saml2.core.AuthnRequest;
  36 import org.opensaml.saml2.core.AuthnStatement;
  37 import org.opensaml.saml2.core.RequestedAuthnContext;
  38 import org.opensaml.saml2.core.Response;
  39 import org.opensaml.saml2.core.Statement;
  40 import org.opensaml.saml2.core.StatusCode;
  41 import org.opensaml.saml2.core.Subject;
  42 import org.opensaml.saml2.core.SubjectLocality;
  43 import org.opensaml.saml2.metadata.AssertionConsumerService;
  44 import org.opensaml.saml2.metadata.Endpoint;
  45 import org.opensaml.saml2.metadata.EntityDescriptor;
  46 import org.opensaml.saml2.metadata.IDPSSODescriptor;
  47 import org.opensaml.saml2.metadata.SPSSODescriptor;
  48 import org.opensaml.saml2.metadata.provider.MetadataProvider;
  49 import org.opensaml.saml2.metadata.provider.MetadataProviderException;
  50 import org.opensaml.ws.message.decoder.MessageDecodingException;
  51 import org.opensaml.ws.transport.http.HTTPInTransport;
  52 import org.opensaml.ws.transport.http.HTTPOutTransport;
  53 import org.opensaml.ws.transport.http.HttpServletRequestAdapter;
  54 import org.opensaml.ws.transport.http.HttpServletResponseAdapter;
  55 import org.opensaml.xml.io.MarshallingException;
  56 import org.opensaml.xml.io.UnmarshallingException;
  57 import org.opensaml.xml.security.SecurityException;
  58 import org.opensaml.xml.util.DatatypeHelper;
  59 import org.slf4j.Logger;
  60 import org.slf4j.LoggerFactory;
  61
  62 import edu.internet2.middleware.shibboleth.common.profile.ProfileException;
  63 import edu.internet2.middleware.shibboleth.common.relyingparty.ProfileConfiguration;
  64 import edu.internet2.middleware.shibboleth.common.relyingparty.RelyingPartyConfiguration;
  65 import edu.internet2.middleware.shibboleth.common.relyingparty.provider.saml2.SSOConfiguration;
  66 import edu.internet2.middleware.shibboleth.common.util.HttpHelper;
  67 import edu.internet2.middleware.shibboleth.idp.authn.LoginContext;
  68 import edu.internet2.middleware.shibboleth.idp.authn.Saml2LoginContext;
  69
  70 /** SAML 2.0 SSO request profile handler. */
  71 public class SSOProfileHandler extends AbstractSAML2ProfileHandler {
  72
  73     /** Class logger. */
  74     private final Logger log = LoggerFactory.getLogger(SSOProfileHandler.class);
  75
  76     /** Builder of AuthnStatement objects. */
  77     private SAMLObjectBuilder<AuthnStatement> authnStatementBuilder;
  78
  79     /** Builder of AuthnContext objects. */
  80     private SAMLObjectBuilder<AuthnContext> authnContextBuilder;
  81
  82     /** Builder of AuthnContextClassRef objects. */
  83     private SAMLObjectBuilder<AuthnContextClassRef> authnContextClassRefBuilder;
  84
  85     /** Builder of AuthnContextDeclRef objects. */
  86     private SAMLObjectBuilder<AuthnContextDeclRef> authnContextDeclRefBuilder;
  87
  88     /** Builder of SubjectLocality objects. */
  89     private SAMLObjectBuilder<SubjectLocality> subjectLocalityBuilder;
  90
  91     /** URL of the authentication manager servlet. */
  92     private String authenticationManagerPath;
  93
  94     /** URI of request decoder. */
  95     private String decodingBinding;
  96
  97     /**
  98      * Constructor.
  99      *
 100      * @param authnManagerPath path to the authentication manager servlet
 101      */
 102     @SuppressWarnings("unchecked")
 103     public SSOProfileHandler(String authnManagerPath) {
 104         super();
 105
 106         authenticationManagerPath = authnManagerPath;
 107
 108         authnStatementBuilder = (SAMLObjectBuilder<AuthnStatement>) getBuilderFactory().getBuilder(
 109                 AuthnStatement.DEFAULT_ELEMENT_NAME);
 110         authnContextBuilder = (SAMLObjectBuilder<AuthnContext>) getBuilderFactory().getBuilder(
 111                 AuthnContext.DEFAULT_ELEMENT_NAME);
 112         authnContextClassRefBuilder = (SAMLObjectBuilder<AuthnContextClassRef>) getBuilderFactory().getBuilder(
 113                 AuthnContextClassRef.DEFAULT_ELEMENT_NAME);
 114         authnContextDeclRefBuilder = (SAMLObjectBuilder<AuthnContextDeclRef>) getBuilderFactory().getBuilder(
 115                 AuthnContextDeclRef.DEFAULT_ELEMENT_NAME);
 116         subjectLocalityBuilder = (SAMLObjectBuilder<SubjectLocality>) getBuilderFactory().getBuilder(
 117                 SubjectLocality.DEFAULT_ELEMENT_NAME);
 118     }
 119
 120     /** {@inheritDoc} */
 121     public String getProfileId() {
 122         return "urn:mace:shibboleth:2.0:idp:profiles:saml2:request:sso";
 123     }
 124
 125     /** {@inheritDoc} */
 126     public void processRequest(HTTPInTransport inTransport, HTTPOutTransport outTransport) throws ProfileException {
 127         HttpServletRequest servletRequest = ((HttpServletRequestAdapter) inTransport).getWrappedRequest();
 128         HttpSession httpSession = servletRequest.getSession(true);
 129         LoginContext loginContext = (LoginContext) httpSession.getAttribute(LoginContext.LOGIN_CONTEXT_KEY);
 130
 131         if (loginContext == null) {
 132             log.debug("User session does not contain a login context, processing as first leg of request");
 133             performAuthentication(inTransport, outTransport);
 134         } else if (!loginContext.isPrincipalAuthenticated() && !loginContext.getAuthenticationAttempted()) {
 135             log
 136                     .debug("User session contained a login context but user was not authenticated, processing as first leg of request");
 137             performAuthentication(inTransport, outTransport);
 138         } else {
 139             log.debug("User session contains a login context, processing as second leg of request");
 140             completeAuthenticationRequest(inTransport, outTransport);
 141         }
 142     }
 143
 144     /**
 145      * Creates a {@link Saml2LoginContext} an sends the request off to the AuthenticationManager to begin the process of
 146      * authenticating the user.
 147      *
 148      * @param inTransport inbound request transport
 149      * @param outTransport outbound response transport
 150      *
 151      * @throws ProfileException thrown if there is a problem creating the login context and transferring control to the
 152      *             authentication manager
 153      */
 154     protected void performAuthentication(HTTPInTransport inTransport, HTTPOutTransport outTransport)
 155             throws ProfileException {
 156         HttpServletRequest servletRequest = ((HttpServletRequestAdapter) inTransport).getWrappedRequest();
 157         HttpSession httpSession = servletRequest.getSession();
 158
 159         try {
 160             SSORequestContext requestContext = decodeRequest(inTransport, outTransport);
 161
 162             String relyingPartyId = requestContext.getInboundMessageIssuer();
 163             RelyingPartyConfiguration rpConfig = getRelyingPartyConfiguration(relyingPartyId);
 164             ProfileConfiguration ssoConfig = rpConfig.getProfileConfiguration(SSOConfiguration.PROFILE_ID);
 165             if (ssoConfig == null) {
 166                 log.error("SAML 2 SSO profile is not configured for relying party "
 167                         + requestContext.getInboundMessageIssuer());
 168                 throw new ProfileException("SAML 2 SSO profile is not configured for relying party "
 169                         + requestContext.getInboundMessageIssuer());
 170             }
 171
 172             log.debug("Creating login context and transferring control to authentication engine");
 173             Saml2LoginContext loginContext = new Saml2LoginContext(relyingPartyId, requestContext.getRelayState(),
 174                     requestContext.getInboundSAMLMessage());
 175             loginContext.setAuthenticationEngineURL(authenticationManagerPath);
 176             loginContext.setProfileHandlerURL(HttpHelper.getRequestUriWithoutContext(servletRequest));
 177             if (loginContext.getRequestedAuthenticationMethods().size() == 0) {
 178                 loginContext.getRequestedAuthenticationMethods().add(rpConfig.getDefaultAuthenticationMethod());
 179             }
 180
 181             httpSession.setAttribute(Saml2LoginContext.LOGIN_CONTEXT_KEY, loginContext);
 182             RequestDispatcher dispatcher = servletRequest.getRequestDispatcher(authenticationManagerPath);
 183             dispatcher.forward(servletRequest, ((HttpServletResponseAdapter) outTransport).getWrappedResponse());
 184         } catch (MarshallingException e) {
 185             httpSession.removeAttribute(LoginContext.LOGIN_CONTEXT_KEY);
 186             log.error("Unable to marshall authentication request context");
 187             throw new ProfileException("Unable to marshall authentication request context", e);
 188         } catch (IOException ex) {
 189             httpSession.removeAttribute(LoginContext.LOGIN_CONTEXT_KEY);
 190             log.error("Error forwarding SAML 2 AuthnRequest to AuthenticationManager", ex);
 191             throw new ProfileException("Error forwarding SAML 2 AuthnRequest to AuthenticationManager", ex);
 192         } catch (ServletException ex) {
 193             httpSession.removeAttribute(LoginContext.LOGIN_CONTEXT_KEY);
 194             log.error("Error forwarding SAML 2 AuthnRequest to AuthenticationManager", ex);
 195             throw new ProfileException("Error forwarding SAML 2 AuthnRequest to AuthenticationManager", ex);
 196         }
 197     }
 198
 199     /**
 200      * Creates a response to the {@link AuthnRequest} and sends the user, with response in tow, back to the relying
 201      * party after they've been authenticated.
 202      *
 203      * @param inTransport inbound message transport
 204      * @param outTransport outbound message transport
 205      *
 206      * @throws ProfileException thrown if the response can not be created and sent back to the relying party
 207      */
 208     protected void completeAuthenticationRequest(HTTPInTransport inTransport, HTTPOutTransport outTransport)
 209             throws ProfileException {
 210         HttpServletRequest servletRequest = ((HttpServletRequestAdapter) inTransport).getWrappedRequest();
 211         HttpSession httpSession = servletRequest.getSession();
 212
 213         Saml2LoginContext loginContext = (Saml2LoginContext) httpSession.getAttribute(LoginContext.LOGIN_CONTEXT_KEY);
 214         httpSession.removeAttribute(LoginContext.LOGIN_CONTEXT_KEY);
 215
 216         SSORequestContext requestContext = buildRequestContext(loginContext, inTransport, outTransport);
 217
 218         checkSamlVersion(requestContext);
 219
 220         Response samlResponse;
 221         try {
 222             if (loginContext.getPrincipalName() == null) {
 223                 log.error("User's login context did not contain a principal, user considered unauthenticiated.");
 224                 if (loginContext.getPassiveAuth()) {
 225                     requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER_URI, StatusCode.NO_PASSIVE_URI,
 226                             null));
 227                 } else {
 228                     requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER_URI, StatusCode.AUTHN_FAILED_URI,
 229                             null));
 230                 }
 231                 throw new ProfileException("User failed authentication");
 232             }
 233
 234             if (requestContext.getSubjectNameIdentifier() != null) {
 235                 log
 236                         .debug("Authentication request contained a subject with a name identifier, resolving principal from NameID");
 237                 resolvePrincipal(requestContext);
 238                 String requestedPrincipalName = requestContext.getPrincipalName();
 239                 if (!DatatypeHelper.safeEquals(loginContext.getPrincipalName(), requestedPrincipalName)) {
 240                     log
 241                             .error(
 242                                     "Authentication request identified principal {} but authentication mechanism identified principal {}",
 243                                     requestedPrincipalName, loginContext.getPrincipalName());
 244                     requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER_URI, StatusCode.AUTHN_FAILED_URI,
 245                             null));
 246                     throw new ProfileException("User failed authentication");
 247                 }
 248             }
 249
 250             resolveAttributes(requestContext);
 251
 252             ArrayList<Statement> statements = new ArrayList<Statement>();
 253             statements.add(buildAuthnStatement(requestContext));
 254             if (requestContext.getProfileConfiguration().includeAttributeStatement()) {
 255                 AttributeStatement attributeStatement = buildAttributeStatement(requestContext);
 256                 if (attributeStatement != null) {
 257                     requestContext.setRequestedAttributes(requestContext.getPrincipalAttributes().keySet());
 258                     statements.add(attributeStatement);
 259                 }
 260             }
 261
 262             samlResponse = buildResponse(requestContext, "urn:oasis:names:tc:SAML:2.0:cm:bearer", statements);
 263         } catch (ProfileException e) {
 264             samlResponse = buildErrorResponse(requestContext);
 265         }
 266
 267         requestContext.setOutboundSAMLMessage(samlResponse);
 268         requestContext.setOutboundSAMLMessageId(samlResponse.getID());
 269         requestContext.setOutboundSAMLMessageIssueInstant(samlResponse.getIssueInstant());
 270         encodeResponse(requestContext);
 271         writeAuditLogEntry(requestContext);
 272     }
 273
 274     /**
 275      * Decodes an incoming request and stores the information in a created request context.
 276      *
 277      * @param inTransport inbound transport
 278      * @param outTransport outbound transport
 279      *
 280      * @return request context with decoded information
 281      *
 282      * @throws ProfileException thrown if the incoming message failed decoding
 283      */
 284     protected SSORequestContext decodeRequest(HTTPInTransport inTransport, HTTPOutTransport outTransport)
 285             throws ProfileException {
 286         log.debug("Decoding message with decoder binding {}", getInboundBinding());
 287         SSORequestContext requestContext = new SSORequestContext();
 288         requestContext.setMetadataProvider(getMetadataProvider());
 289         requestContext.setSecurityPolicyResolver(getSecurityPolicyResolver());
 290
 291         requestContext.setCommunicationProfileId(SSOConfiguration.PROFILE_ID);
 292         requestContext.setInboundMessageTransport(inTransport);
 293         requestContext.setInboundSAMLProtocol(SAMLConstants.SAML20P_NS);
 294         requestContext.setPeerEntityRole(SPSSODescriptor.DEFAULT_ELEMENT_NAME);
 295
 296         requestContext.setOutboundMessageTransport(outTransport);
 297         requestContext.setOutboundSAMLProtocol(SAMLConstants.SAML20P_NS);
 298
 299         try {
 300             SAMLMessageDecoder decoder = getMessageDecoders().get(getInboundBinding());
 301             requestContext.setMessageDecoder(decoder);
 302             decoder.decode(requestContext);
 303             log.debug("Decoded request");
 304
 305             if (!(requestContext.getInboundMessage() instanceof AuthnRequest)) {
 306                 log.error("Incomming message was not a AuthnRequest, it was a {}", requestContext.getInboundMessage()
 307                         .getClass().getName());
 308                 requestContext.setFailureStatus(buildStatus(StatusCode.REQUESTER_URI, null,
 309                         "Invalid SAML AuthnRequest message."));
 310                 throw new ProfileException("Invalid SAML AuthnRequest message.");
 311             }
 312
 313             return requestContext;
 314         } catch (MessageDecodingException e) {
 315             log.error("Error decoding authentication request message", e);
 316             throw new ProfileException("Error decoding authentication request message", e);
 317         } catch (SecurityException e) {
 318             log.error("Message did not meet security requirements", e);
 319             throw new ProfileException("Message did not meet security requirements", e);
 320         }
 321     }
 322
 323     /**
 324      * Creates an authentication request context from the current environmental information.
 325      *
 326      * @param loginContext current login context
 327      * @param in inbound transport
 328      * @param out outbount transport
 329      *
 330      * @return created authentication request context
 331      *
 332      * @throws ProfileException thrown if there is a problem creating the context
 333      */
 334     protected SSORequestContext buildRequestContext(Saml2LoginContext loginContext, HTTPInTransport in,
 335             HTTPOutTransport out) throws ProfileException {
 336         SSORequestContext requestContext = new SSORequestContext();
 337
 338         requestContext.setMessageDecoder(getMessageDecoders().get(getInboundBinding()));
 339
 340         requestContext.setLoginContext(loginContext);
 341         requestContext.setPrincipalName(loginContext.getPrincipalName());
 342         requestContext.setPrincipalAuthenticationMethod(loginContext.getAuthenticationMethod());
 343         requestContext.setUserSession(getUserSession(in));
 344         requestContext.setRelayState(loginContext.getRelayState());
 345
 346         requestContext.setInboundMessageTransport(in);
 347         requestContext.setInboundSAMLProtocol(SAMLConstants.SAML20P_NS);
 348
 349         try {
 350             AuthnRequest authnRequest = loginContext.getAuthenticationRequest();
 351             requestContext.setInboundMessage(authnRequest);
 352             requestContext.setInboundSAMLMessage(loginContext.getAuthenticationRequest());
 353             requestContext.setInboundSAMLMessageId(loginContext.getAuthenticationRequest().getID());
 354
 355             Subject authnSubject = authnRequest.getSubject();
 356             if (authnSubject != null) {
 357                 requestContext.setSubjectNameIdentifier(authnSubject.getNameID());
 358             }
 359         } catch (UnmarshallingException e) {
 360             log.error("Unable to unmarshall authentication request context");
 361             requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER_URI, null,
 362                     "Error recovering request state"));
 363             throw new ProfileException("Error recovering request state", e);
 364         }
 365
 366         requestContext.setOutboundMessageTransport(out);
 367         requestContext.setOutboundSAMLProtocol(SAMLConstants.SAML20P_NS);
 368
 369         MetadataProvider metadataProvider = getMetadataProvider();
 370         requestContext.setMetadataProvider(metadataProvider);
 371
 372         String relyingPartyId = loginContext.getRelyingPartyId();
 373         requestContext.setInboundMessageIssuer(relyingPartyId);
 374         try {
 375             EntityDescriptor relyingPartyMetadata = metadataProvider.getEntityDescriptor(relyingPartyId);
 376             if (relyingPartyMetadata != null) {
 377                 requestContext.setPeerEntityMetadata(relyingPartyMetadata);
 378                 requestContext.setPeerEntityRole(SPSSODescriptor.DEFAULT_ELEMENT_NAME);
 379                 requestContext.setPeerEntityRoleMetadata(relyingPartyMetadata
 380                         .getSPSSODescriptor(SAMLConstants.SAML20P_NS));
 381             }
 382         } catch (MetadataProviderException e) {
 383             log.error("Unable to locate metadata for relying party");
 384             requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER_URI, null,
 385                     "Error locating relying party metadata"));
 386             throw new ProfileException("Error locating relying party metadata");
 387         }
 388
 389         RelyingPartyConfiguration rpConfig = getRelyingPartyConfiguration(relyingPartyId);
 390         if (rpConfig == null) {
 391             log.error("Unable to retrieve relying party configuration data for entity with ID {}", relyingPartyId);
 392             throw new ProfileException("Unable to retrieve relying party configuration data for entity with ID "
 393                     + relyingPartyId);
 394         }
 395         requestContext.setRelyingPartyConfiguration(rpConfig);
 396
 397         SSOConfiguration profileConfig = (SSOConfiguration) rpConfig
 398                 .getProfileConfiguration(SSOConfiguration.PROFILE_ID);
 399         requestContext.setProfileConfiguration(profileConfig);
 400         requestContext.setOutboundMessageArtifactType(profileConfig.getOutboundArtifactType());
 401         requestContext.setPeerEntityEndpoint(selectEndpoint(requestContext));
 402
 403         String assertingPartyId = rpConfig.getProviderId();
 404         requestContext.setLocalEntityId(assertingPartyId);
 405         requestContext.setOutboundMessageIssuer(assertingPartyId);
 406         try {
 407             EntityDescriptor localEntityDescriptor = metadataProvider.getEntityDescriptor(assertingPartyId);
 408             if (localEntityDescriptor != null) {
 409                 requestContext.setLocalEntityMetadata(localEntityDescriptor);
 410                 requestContext.setLocalEntityRole(IDPSSODescriptor.DEFAULT_ELEMENT_NAME);
 411                 requestContext.setLocalEntityRoleMetadata(localEntityDescriptor
 412                         .getIDPSSODescriptor(SAMLConstants.SAML20P_NS));
 413             }
 414         } catch (MetadataProviderException e) {
 415             log.error("Unable to locate metadata for asserting party");
 416             requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER_URI, null,
 417                     "Error locating asserting party metadata"));
 418             throw new ProfileException("Error locating asserting party metadata");
 419         }
 420
 421         return requestContext;
 422     }
 423
 424     /**
 425      * Creates an authentication statement for the current request.
 426      *
 427      * @param requestContext current request context
 428      *
 429      * @return constructed authentication statement
 430      */
 431     protected AuthnStatement buildAuthnStatement(SSORequestContext requestContext) {
 432         Saml2LoginContext loginContext = requestContext.getLoginContext();
 433
 434         AuthnContext authnContext = buildAuthnContext(requestContext);
 435
 436         AuthnStatement statement = authnStatementBuilder.buildObject();
 437         statement.setAuthnContext(authnContext);
 438         statement.setAuthnInstant(loginContext.getAuthenticationInstant());
 439
 440         // TODO
 441         statement.setSessionIndex(null);
 442
 443         if (loginContext.getAuthenticationDuration() > 0) {
 444             statement.setSessionNotOnOrAfter(loginContext.getAuthenticationInstant().plus(
 445                     loginContext.getAuthenticationDuration()));
 446         }
 447
 448         statement.setSubjectLocality(buildSubjectLocality(requestContext));
 449
 450         return statement;
 451     }
 452
 453     /**
 454      * Creates an {@link AuthnContext} for a succesful authentication request.
 455      *
 456      * @param requestContext current request
 457      *
 458      * @return the built authn context
 459      */
 460     protected AuthnContext buildAuthnContext(SSORequestContext requestContext) {
 461         AuthnContext authnContext = authnContextBuilder.buildObject();
 462
 463         Saml2LoginContext loginContext = requestContext.getLoginContext();
 464         AuthnRequest authnRequest = requestContext.getInboundSAMLMessage();
 465         RequestedAuthnContext requestedAuthnContext = authnRequest.getRequestedAuthnContext();
 466         if (requestedAuthnContext != null) {
 467             if (requestedAuthnContext.getAuthnContextClassRefs() != null) {
 468                 for (AuthnContextClassRef classRef : requestedAuthnContext.getAuthnContextClassRefs()) {
 469                     if (classRef.getAuthnContextClassRef().equals(loginContext.getAuthenticationMethod())) {
 470                         AuthnContextClassRef ref = authnContextClassRefBuilder.buildObject();
 471                         ref.setAuthnContextClassRef(loginContext.getAuthenticationMethod());
 472                         authnContext.setAuthnContextClassRef(ref);
 473                     }
 474                 }
 475             } else if (requestedAuthnContext.getAuthnContextDeclRefs() != null) {
 476                 for (AuthnContextDeclRef declRef : requestedAuthnContext.getAuthnContextDeclRefs()) {
 477                     if (declRef.getAuthnContextDeclRef().equals(loginContext.getAuthenticationMethod())) {
 478                         AuthnContextDeclRef ref = authnContextDeclRefBuilder.buildObject();
 479                         ref.setAuthnContextDeclRef(loginContext.getAuthenticationMethod());
 480                         authnContext.setAuthnContextDeclRef(ref);
 481                     }
 482                 }
 483             }
 484         } else {
 485             AuthnContextDeclRef ref = authnContextDeclRefBuilder.buildObject();
 486             ref.setAuthnContextDeclRef(loginContext.getAuthenticationMethod());
 487             authnContext.setAuthnContextDeclRef(ref);
 488         }
 489
 490         return authnContext;
 491     }
 492
 493     /**
 494      * Constructs the subject locality for the authentication statement.
 495      *
 496      * @param requestContext curent request context
 497      *
 498      * @return subject locality for the authentication statement
 499      */
 500     protected SubjectLocality buildSubjectLocality(SSORequestContext requestContext) {
 501         HTTPInTransport transport = (HTTPInTransport) requestContext.getInboundMessageTransport();
 502         SubjectLocality subjectLocality = subjectLocalityBuilder.buildObject();
 503         subjectLocality.setAddress(transport.getPeerAddress());
 504         subjectLocality.setDNSName(transport.getPeerDomainName());
 505
 506         return subjectLocality;
 507     }
 508
 509     /**
 510      * Selects the appropriate endpoint for the relying party and stores it in the request context.
 511      *
 512      * @param requestContext current request context
 513      *
 514      * @return Endpoint selected from the information provided in the request context
 515      */
 516     protected Endpoint selectEndpoint(SSORequestContext requestContext) {
 517         AuthnResponseEndpointSelector endpointSelector = new AuthnResponseEndpointSelector();
 518         endpointSelector.setEndpointType(AssertionConsumerService.DEFAULT_ELEMENT_NAME);
 519         endpointSelector.setMetadataProvider(getMetadataProvider());
 520         endpointSelector.setEntityMetadata(requestContext.getPeerEntityMetadata());
 521         endpointSelector.setEntityRoleMetadata(requestContext.getPeerEntityRoleMetadata());
 522         endpointSelector.setSamlRequest(requestContext.getInboundSAMLMessage());
 523         endpointSelector.getSupportedIssuerBindings().addAll(getSupportedOutboundBindings());
 524         return endpointSelector.selectEndpoint();
 525     }
 526
 527     /** Represents the internal state of a SAML 2.0 SSO Request while it's being processed by the IdP. */
 528     protected class SSORequestContext extends BaseSAML2ProfileRequestContext<AuthnRequest, Response, SSOConfiguration> {
 529
 530         /** Current login context. */
 531         private Saml2LoginContext loginContext;
 532
 533         /**
 534          * Gets the current login context.
 535          *
 536          * @return current login context
 537          */
 538         public Saml2LoginContext getLoginContext() {
 539             return loginContext;
 540         }
 541
 542         /**
 543          * Sets the current login context.
 544          *
 545          * @param context current login context
 546          */
 547         public void setLoginContext(Saml2LoginContext context) {
 548             loginContext = context;
 549         }
 550     }
 551 }