src/edu/internet2/middleware/shibboleth/idp/profile/saml2/AbstractSAML2ProfileHandler.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.util.ArrayList;
  20 import java.util.Collection;
  21 import java.util.List;
  22 import java.util.Map;
  23
  24 import javax.servlet.ServletRequest;
  25 import javax.servlet.ServletResponse;
  26
  27 import org.apache.log4j.Logger;
  28 import org.joda.time.DateTime;
  29 import org.opensaml.common.SAMLObjectBuilder;
  30 import org.opensaml.common.SAMLVersion;
  31 import org.opensaml.common.impl.SAMLObjectContentReference;
  32 import org.opensaml.common.xml.SAMLConstants;
  33 import org.opensaml.log.Level;
  34 import org.opensaml.saml2.core.Advice;
  35 import org.opensaml.saml2.core.Assertion;
  36 import org.opensaml.saml2.core.AttributeQuery;
  37 import org.opensaml.saml2.core.AttributeStatement;
  38 import org.opensaml.saml2.core.Audience;
  39 import org.opensaml.saml2.core.AudienceRestriction;
  40 import org.opensaml.saml2.core.AuthnRequest;
  41 import org.opensaml.saml2.core.Conditions;
  42 import org.opensaml.saml2.core.Issuer;
  43 import org.opensaml.saml2.core.NameID;
  44 import org.opensaml.saml2.core.ProxyRestriction;
  45 import org.opensaml.saml2.core.RequestAbstractType;
  46 import org.opensaml.saml2.core.Response;
  47 import org.opensaml.saml2.core.Statement;
  48 import org.opensaml.saml2.core.Status;
  49 import org.opensaml.saml2.core.StatusCode;
  50 import org.opensaml.saml2.core.StatusMessage;
  51 import org.opensaml.saml2.core.StatusResponseType;
  52 import org.opensaml.saml2.core.Subject;
  53 import org.opensaml.saml2.core.SubjectConfirmation;
  54 import org.opensaml.saml2.metadata.AttributeAuthorityDescriptor;
  55 import org.opensaml.saml2.metadata.AuthnAuthorityDescriptor;
  56 import org.opensaml.saml2.metadata.NameIDFormat;
  57 import org.opensaml.saml2.metadata.PDPDescriptor;
  58 import org.opensaml.saml2.metadata.RoleDescriptor;
  59 import org.opensaml.saml2.metadata.SPSSODescriptor;
  60 import org.opensaml.saml2.metadata.SSODescriptor;
  61 import org.opensaml.saml2.metadata.provider.MetadataProviderException;
  62 import org.opensaml.xml.XMLObjectBuilder;
  63 import org.opensaml.xml.security.credential.Credential;
  64 import org.opensaml.xml.signature.Signature;
  65 import org.opensaml.xml.signature.Signer;
  66 import org.opensaml.xml.util.DatatypeHelper;
  67
  68 import edu.internet2.middleware.shibboleth.common.attribute.AttributeRequestException;
  69 import edu.internet2.middleware.shibboleth.common.attribute.BaseAttribute;
  70 import edu.internet2.middleware.shibboleth.common.attribute.encoding.AttributeEncoder;
  71 import edu.internet2.middleware.shibboleth.common.attribute.encoding.AttributeEncodingException;
  72 import edu.internet2.middleware.shibboleth.common.attribute.provider.SAML2AttributeAuthority;
  73 import edu.internet2.middleware.shibboleth.common.attribute.provider.ShibbolethSAMLAttributeRequestContext;
  74 import edu.internet2.middleware.shibboleth.common.log.AuditLogEntry;
  75 import edu.internet2.middleware.shibboleth.common.profile.ProfileException;
  76 import edu.internet2.middleware.shibboleth.common.profile.ProfileRequest;
  77 import edu.internet2.middleware.shibboleth.common.profile.ProfileResponse;
  78 import edu.internet2.middleware.shibboleth.common.relyingparty.provider.saml2.AbstractSAML2ProfileConfiguration;
  79 import edu.internet2.middleware.shibboleth.idp.profile.AbstractSAMLProfileHandler;
  80 import edu.internet2.middleware.shibboleth.idp.session.ServiceInformation;
  81 import edu.internet2.middleware.shibboleth.idp.session.Session;
  82
  83 /** Common implementation details for profile handlers. */
  84 public abstract class AbstractSAML2ProfileHandler extends AbstractSAMLProfileHandler {
  85
  86     /** SAML Version for this profile handler. */
  87     public static final SAMLVersion SAML_VERSION = SAMLVersion.VERSION_20;
  88
  89     /** Class logger. */
  90     private Logger log = Logger.getLogger(AbstractSAML2ProfileHandler.class);
  91
  92     /** For building response. */
  93     private SAMLObjectBuilder<Response> responseBuilder;
  94
  95     /** For building status. */
  96     private SAMLObjectBuilder<Status> statusBuilder;
  97
  98     /** For building statuscode. */
  99     private SAMLObjectBuilder<StatusCode> statusCodeBuilder;
 100
 101     /** For building StatusMessages. */
 102     private SAMLObjectBuilder<StatusMessage> statusMessageBuilder;
 103
 104     /** For building assertion. */
 105     private SAMLObjectBuilder<Assertion> assertionBuilder;
 106
 107     /** For building issuer. */
 108     private SAMLObjectBuilder<Issuer> issuerBuilder;
 109
 110     /** For building subject. */
 111     private SAMLObjectBuilder<Subject> subjectBuilder;
 112
 113     /** For builder subject confirmation. */
 114     private SAMLObjectBuilder<SubjectConfirmation> subjectConfirmationBuilder;
 115
 116     /** For building conditions. */
 117     private SAMLObjectBuilder<Conditions> conditionsBuilder;
 118
 119     /** For building audience restriction. */
 120     private SAMLObjectBuilder<AudienceRestriction> audienceRestrictionBuilder;
 121
 122     /** For building proxy retrictions. */
 123     private SAMLObjectBuilder<ProxyRestriction> proxyRestrictionBuilder;
 124
 125     /** For building audience. */
 126     private SAMLObjectBuilder<Audience> audienceBuilder;
 127
 128     /** For building advice. */
 129     private SAMLObjectBuilder<Advice> adviceBuilder;
 130
 131     /** For building signature. */
 132     private XMLObjectBuilder<Signature> signatureBuilder;
 133
 134     /** Constructor. */
 135     @SuppressWarnings("unchecked")
 136     protected AbstractSAML2ProfileHandler() {
 137         super();
 138
 139         responseBuilder = (SAMLObjectBuilder<Response>) getBuilderFactory().getBuilder(Response.DEFAULT_ELEMENT_NAME);
 140         statusBuilder = (SAMLObjectBuilder<Status>) getBuilderFactory().getBuilder(Status.DEFAULT_ELEMENT_NAME);
 141         statusCodeBuilder = (SAMLObjectBuilder<StatusCode>) getBuilderFactory().getBuilder(
 142                 StatusCode.DEFAULT_ELEMENT_NAME);
 143         statusMessageBuilder = (SAMLObjectBuilder<StatusMessage>) getBuilderFactory().getBuilder(
 144                 StatusMessage.DEFAULT_ELEMENT_NAME);
 145         issuerBuilder = (SAMLObjectBuilder<Issuer>) getBuilderFactory().getBuilder(Issuer.DEFAULT_ELEMENT_NAME);
 146         assertionBuilder = (SAMLObjectBuilder<Assertion>) getBuilderFactory()
 147                 .getBuilder(Assertion.DEFAULT_ELEMENT_NAME);
 148         subjectBuilder = (SAMLObjectBuilder<Subject>) getBuilderFactory().getBuilder(Subject.DEFAULT_ELEMENT_NAME);
 149         subjectConfirmationBuilder = (SAMLObjectBuilder<SubjectConfirmation>) getBuilderFactory().getBuilder(
 150                 SubjectConfirmation.DEFAULT_ELEMENT_NAME);
 151         conditionsBuilder = (SAMLObjectBuilder<Conditions>) getBuilderFactory().getBuilder(
 152                 Conditions.DEFAULT_ELEMENT_NAME);
 153         audienceRestrictionBuilder = (SAMLObjectBuilder<AudienceRestriction>) getBuilderFactory().getBuilder(
 154                 AudienceRestriction.DEFAULT_ELEMENT_NAME);
 155         proxyRestrictionBuilder = (SAMLObjectBuilder<ProxyRestriction>) getBuilderFactory().getBuilder(
 156                 ProxyRestriction.DEFAULT_ELEMENT_NAME);
 157         audienceBuilder = (SAMLObjectBuilder<Audience>) getBuilderFactory().getBuilder(Audience.DEFAULT_ELEMENT_NAME);
 158         adviceBuilder = (SAMLObjectBuilder<Advice>) getBuilderFactory().getBuilder(Advice.DEFAULT_ELEMENT_NAME);
 159         signatureBuilder = (XMLObjectBuilder<Signature>) getBuilderFactory().getBuilder(Signature.DEFAULT_ELEMENT_NAME);
 160     }
 161
 162     /**
 163      * Convenience method for getting the SAML 2 advice builder.
 164      *
 165      * @return SAML 2 advice builder
 166      */
 167     public SAMLObjectBuilder<Advice> getAdviceBuilder() {
 168         return adviceBuilder;
 169     }
 170
 171     /**
 172      * Convenience method for getting the SAML 2 assertion builder.
 173      *
 174      * @return SAML 2 assertion builder
 175      */
 176     public SAMLObjectBuilder<Assertion> getAssertionBuilder() {
 177         return assertionBuilder;
 178     }
 179
 180     /**
 181      * Convenience method for getting the SAML 2 audience builder.
 182      *
 183      * @return SAML 2 audience builder
 184      */
 185     public SAMLObjectBuilder<Audience> getAudienceBuilder() {
 186         return audienceBuilder;
 187     }
 188
 189     /**
 190      * Convenience method for getting the SAML 2 audience restriction builder.
 191      *
 192      * @return SAML 2 audience restriction builder
 193      */
 194     public SAMLObjectBuilder<AudienceRestriction> getAudienceRestrictionBuilder() {
 195         return audienceRestrictionBuilder;
 196     }
 197
 198     /**
 199      * Convenience method for getting the SAML 2 conditions builder.
 200      *
 201      * @return SAML 2 conditions builder
 202      */
 203     public SAMLObjectBuilder<Conditions> getConditionsBuilder() {
 204         return conditionsBuilder;
 205     }
 206
 207     /**
 208      * Convenience method for getting the SAML 2 Issuer builder.
 209      *
 210      * @return SAML 2 Issuer builder
 211      */
 212     public SAMLObjectBuilder<Issuer> getIssuerBuilder() {
 213         return issuerBuilder;
 214     }
 215
 216     /**
 217      * Convenience method for getting the SAML 2 proxy restriction builder.
 218      *
 219      * @return SAML 2 proxy restriction builder
 220      */
 221     public SAMLObjectBuilder<ProxyRestriction> getProxyRestrictionBuilder() {
 222         return proxyRestrictionBuilder;
 223     }
 224
 225     /**
 226      * Convenience method for getting the SAML 2 response builder.
 227      *
 228      * @return SAML 2 response builder
 229      */
 230     public SAMLObjectBuilder<Response> getResponseBuilder() {
 231         return responseBuilder;
 232     }
 233
 234     /**
 235      * Convenience method for getting the Signature builder.
 236      *
 237      * @return signature builder
 238      */
 239     public XMLObjectBuilder<Signature> getSignatureBuilder() {
 240         return signatureBuilder;
 241     }
 242
 243     /**
 244      * Convenience method for getting the SAML 2 status builder.
 245      *
 246      * @return SAML 2 status builder
 247      */
 248     public SAMLObjectBuilder<Status> getStatusBuilder() {
 249         return statusBuilder;
 250     }
 251
 252     /**
 253      * Convenience method for getting the SAML 2 status code builder.
 254      *
 255      * @return SAML 2 status code builder
 256      */
 257     public SAMLObjectBuilder<StatusCode> getStatusCodeBuilder() {
 258         return statusCodeBuilder;
 259     }
 260
 261     /**
 262      * Convenience method for getting the SAML 2 status message builder.
 263      *
 264      * @return SAML 2 status message builder
 265      */
 266     public SAMLObjectBuilder<StatusMessage> getStatusMessageBuilder() {
 267         return statusMessageBuilder;
 268     }
 269
 270     /**
 271      * Convenience method for getting the SAML 2 subject builder.
 272      *
 273      * @return SAML 2 subject builder
 274      */
 275     public SAMLObjectBuilder<Subject> getSubjectBuilder() {
 276         return subjectBuilder;
 277     }
 278
 279     /**
 280      * Convenience method for getting the SAML 2 subject confirmation builder.
 281      *
 282      * @return SAML 2 subject confirmation builder
 283      */
 284     public SAMLObjectBuilder<SubjectConfirmation> getSubjectConfirmationBuilder() {
 285         return subjectConfirmationBuilder;
 286     }
 287
 288     /**
 289      * Checks that the SAML major version for a request is 2.
 290      *
 291      * @param requestContext current request context containing the SAML message
 292      *
 293      * @throws ProfileException thrown if the major version of the SAML request is not 2
 294      */
 295     protected void checkSamlVersion(SAML2ProfileRequestContext requestContext) throws ProfileException {
 296         SAMLVersion version = requestContext.getSamlRequest().getVersion();
 297         if (version.getMajorVersion() < 2) {
 298             requestContext.setFailureStatus(buildStatus(StatusCode.VERSION_MISMATCH_URI,
 299                     StatusCode.REQUEST_VERSION_TOO_LOW_URI, null));
 300             throw new ProfileException("SAML request version too low");
 301         } else if (version.getMajorVersion() > 2) {
 302             requestContext.setFailureStatus(buildStatus(StatusCode.VERSION_MISMATCH_URI,
 303                     StatusCode.REQUEST_VERSION_TOO_HIGH_URI, null));
 304             throw new ProfileException("SAML request version too high");
 305         }
 306     }
 307
 308     /**
 309      * Builds a response to the attribute query within the request context.
 310      *
 311      * @param requestContext current request context
 312      * @param assertionSubject subject of the assertion within the response
 313      * @param statements the statements to include in the response
 314      *
 315      * @return the built response
 316      *
 317      * @throws ProfileException thrown if there is a problem creating the SAML response
 318      */
 319     protected Response buildResponse(SAML2ProfileRequestContext requestContext, Subject assertionSubject,
 320             List<Statement> statements) throws ProfileException {
 321
 322         DateTime issueInstant = new DateTime();
 323
 324         // create the assertion and add the attribute statement
 325         Assertion assertion = buildAssertion(requestContext, issueInstant);
 326         assertion.setSubject(assertionSubject);
 327         if (statements != null) {
 328             assertion.getStatements().addAll(statements);
 329         }
 330
 331         // create the SAML response and add the assertion
 332         Response samlResponse = getResponseBuilder().buildObject();
 333         samlResponse.setIssueInstant(issueInstant);
 334         populateStatusResponse(requestContext, samlResponse);
 335
 336         samlResponse.getAssertions().add(assertion);
 337
 338         // sign the assertion if it should be signed
 339         signAssertion(requestContext, assertion);
 340
 341         Status status = buildStatus(StatusCode.SUCCESS_URI, null, null);
 342         samlResponse.setStatus(status);
 343
 344         return samlResponse;
 345     }
 346
 347     /**
 348      * Builds a basic assertion with its id, issue instant, SAML version, issuer, subject, and conditions populated.
 349      *
 350      * @param requestContext current request context
 351      * @param issueInstant time to use as assertion issue instant
 352      *
 353      * @return the built assertion
 354      */
 355     protected Assertion buildAssertion(SAML2ProfileRequestContext requestContext, DateTime issueInstant) {
 356         Assertion assertion = getAssertionBuilder().buildObject();
 357         assertion.setID(getIdGenerator().generateIdentifier());
 358         assertion.setIssueInstant(issueInstant);
 359         assertion.setVersion(SAMLVersion.VERSION_20);
 360         assertion.setIssuer(buildEntityIssuer(requestContext));
 361
 362         Conditions conditions = buildConditions(requestContext, issueInstant);
 363         assertion.setConditions(conditions);
 364
 365         return assertion;
 366     }
 367
 368     /**
 369      * Creates an {@link Issuer} populated with information about the relying party.
 370      *
 371      * @param requestContext current request context
 372      *
 373      * @return the built issuer
 374      */
 375     protected Issuer buildEntityIssuer(SAML2ProfileRequestContext requestContext) {
 376         Issuer issuer = getIssuerBuilder().buildObject();
 377         issuer.setFormat(Issuer.ENTITY);
 378         issuer.setValue(requestContext.getRelyingPartyId());
 379
 380         return issuer;
 381     }
 382
 383     /**
 384      * Builds a SAML assertion condition set. The following fields are set; not before, not on or after, audience
 385      * restrictions, and proxy restrictions.
 386      *
 387      * @param requestContext current request context
 388      * @param issueInstant timestamp the assertion was created
 389      *
 390      * @return constructed conditions
 391      */
 392     protected Conditions buildConditions(SAML2ProfileRequestContext requestContext, DateTime issueInstant) {
 393         AbstractSAML2ProfileConfiguration profileConfig = requestContext.getProfileConfiguration();
 394
 395         Conditions conditions = getConditionsBuilder().buildObject();
 396         conditions.setNotBefore(issueInstant);
 397         conditions.setNotOnOrAfter(issueInstant.plus(profileConfig.getAssertionLifetime()));
 398
 399         Collection<String> audiences;
 400
 401         // add audience restrictions
 402         audiences = profileConfig.getAssertionAudiences();
 403         if (audiences != null && audiences.size() > 0) {
 404             AudienceRestriction audienceRestriction = getAudienceRestrictionBuilder().buildObject();
 405             for (String audienceUri : audiences) {
 406                 Audience audience = getAudienceBuilder().buildObject();
 407                 audience.setAudienceURI(audienceUri);
 408                 audienceRestriction.getAudiences().add(audience);
 409             }
 410             conditions.getAudienceRestrictions().add(audienceRestriction);
 411         }
 412
 413         // add proxy restrictions
 414         audiences = profileConfig.getProxyAudiences();
 415         if (audiences != null && audiences.size() > 0) {
 416             ProxyRestriction proxyRestriction = getProxyRestrictionBuilder().buildObject();
 417             Audience audience;
 418             for (String audienceUri : audiences) {
 419                 audience = getAudienceBuilder().buildObject();
 420                 audience.setAudienceURI(audienceUri);
 421                 proxyRestriction.getAudiences().add(audience);
 422             }
 423
 424             proxyRestriction.setProxyCount(profileConfig.getProxyCount());
 425             conditions.getConditions().add(proxyRestriction);
 426         }
 427
 428         return conditions;
 429     }
 430
 431     /**
 432      * Populates the response's id, in response to, issue instant, version, and issuer properties.
 433      *
 434      * @param requestContext current request context
 435      * @param response the response to populate
 436      */
 437     protected void populateStatusResponse(SAML2ProfileRequestContext requestContext, StatusResponseType response) {
 438         response.setID(getIdGenerator().generateIdentifier());
 439         if (requestContext.getSamlRequest() != null) {
 440             response.setInResponseTo(requestContext.getSamlRequest().getID());
 441         }
 442         response.setVersion(SAMLVersion.VERSION_20);
 443         response.setIssuer(buildEntityIssuer(requestContext));
 444     }
 445
 446     /**
 447      * Executes a query for attributes and builds a SAML attribute statement from the results.
 448      *
 449      * @param requestContext current request context
 450      *
 451      * @return attribute statement resulting from the query
 452      *
 453      * @throws ProfileException thrown if there is a problem making the query
 454      */
 455     protected AttributeStatement buildAttributeStatement(SAML2ProfileRequestContext requestContext)
 456             throws ProfileException {
 457
 458         if (log.isDebugEnabled()) {
 459             log.debug("Creating attribute statement in response to SAML request "
 460                     + requestContext.getSamlRequest().getID() + " from relying party "
 461                     + requestContext.getRelyingPartyId());
 462         }
 463
 464         AbstractSAML2ProfileConfiguration profileConfiguration = requestContext.getProfileConfiguration();
 465         SAML2AttributeAuthority attributeAuthority = profileConfiguration.getAttributeAuthority();
 466
 467         try {
 468             if (log.isDebugEnabled()) {
 469                 log.debug("Resolving attributes for principal " + requestContext.getPrincipalName()
 470                         + " of SAML request " + requestContext.getSamlRequest().getID() + " from relying party "
 471                         + requestContext.getRelyingPartyId());
 472             }
 473             Map<String, BaseAttribute> principalAttributes = attributeAuthority
 474                     .getAttributes(buildAttributeRequestContext(requestContext));
 475
 476             requestContext.setPrincipalAttributes(principalAttributes);
 477
 478             if (requestContext.getSamlRequest() instanceof AttributeQuery) {
 479                 return attributeAuthority.buildAttributeStatement((AttributeQuery) requestContext.getSamlRequest(),
 480                         principalAttributes.values());
 481             } else {
 482                 return attributeAuthority.buildAttributeStatement(null, principalAttributes.values());
 483             }
 484         } catch (AttributeRequestException e) {
 485             log.error("Error resolving attributes for SAML request " + requestContext.getSamlRequest().getID()
 486                     + " from relying party " + requestContext.getRelyingPartyId(), e);
 487             requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER_URI, null, "Error resolving attributes"));
 488             throw new ProfileException("Error resolving attributes for SAML request "
 489                     + requestContext.getSamlRequest().getID() + " from relying party "
 490                     + requestContext.getRelyingPartyId(), e);
 491         }
 492     }
 493
 494     /**
 495      * Resolves the principal name of the subject of the request.
 496      *
 497      * @param requestContext current request context
 498      *
 499      * @throws ProfileException thrown if the principal name can not be resolved
 500      */
 501     protected void resolvePrincipal(SAML2ProfileRequestContext requestContext) throws ProfileException {
 502         AbstractSAML2ProfileConfiguration profileConfiguration = requestContext.getProfileConfiguration();
 503         if (profileConfiguration == null) {
 504             log.error("Unable to resolve principal, no SAML 2 profile configuration for relying party "
 505                     + requestContext.getRelyingPartyId());
 506             requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER_URI, StatusCode.REQUEST_DENIED_URI,
 507                     "Error resolving principal"));
 508             throw new ProfileException(
 509                     "Unable to resolve principal, no SAML 2 profile configuration for relying party "
 510                             + requestContext.getRelyingPartyId());
 511         }
 512         SAML2AttributeAuthority attributeAuthority = profileConfiguration.getAttributeAuthority();
 513
 514         if (log.isDebugEnabled()) {
 515             log.debug("Resolving principal name for subject of SAML request " + requestContext.getSamlRequest().getID()
 516                     + " from relying party " + requestContext.getRelyingPartyId());
 517         }
 518
 519         try {
 520             String principal = attributeAuthority.getPrincipal(buildAttributeRequestContext(requestContext));
 521             requestContext.setPrincipalName(principal);
 522         } catch (AttributeRequestException e) {
 523             log.error("Error resolving attributes for SAML request " + requestContext.getSamlRequest().getID()
 524                     + " from relying party " + requestContext.getRelyingPartyId(), e);
 525             requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER_URI, StatusCode.UNKNOWN_PRINCIPAL_URI,
 526                     "Error resolving principal"));
 527             throw new ProfileException("Error resolving attributes for SAML request "
 528                     + requestContext.getSamlRequest().getID() + " from relying party "
 529                     + requestContext.getRelyingPartyId(), e);
 530         }
 531     }
 532
 533     /**
 534      * Creates an attribute query context from the current profile request context.
 535      *
 536      * @param requestContext current profile request
 537      *
 538      * @return created query context
 539      */
 540     protected ShibbolethSAMLAttributeRequestContext<NameID, AttributeQuery> buildAttributeRequestContext(
 541             SAML2ProfileRequestContext requestContext) {
 542
 543         ShibbolethSAMLAttributeRequestContext<NameID, AttributeQuery> queryContext;
 544         if (requestContext.getSamlRequest() instanceof AttributeQuery) {
 545             queryContext = new ShibbolethSAMLAttributeRequestContext<NameID, AttributeQuery>(getMetadataProvider(),
 546                     requestContext.getRelyingPartyConfiguration(), (AttributeQuery) requestContext.getSamlRequest());
 547         } else {
 548             queryContext = new ShibbolethSAMLAttributeRequestContext<NameID, AttributeQuery>(getMetadataProvider(),
 549                     requestContext.getRelyingPartyConfiguration());
 550         }
 551
 552         queryContext.setAttributeRequester(requestContext.getAssertingPartyId());
 553         queryContext.setPrincipalName(requestContext.getPrincipalName());
 554         queryContext.setProfileConfiguration(requestContext.getProfileConfiguration());
 555         queryContext.setRequest(requestContext.getProfileRequest());
 556
 557         Session userSession = getSessionManager().getSession(getUserSessionId(requestContext.getProfileRequest()));
 558         if (userSession != null) {
 559             queryContext.setUserSession(userSession);
 560             ServiceInformation serviceInfo = userSession.getServicesInformation().get(
 561                     requestContext.getRelyingPartyId());
 562             if (serviceInfo != null) {
 563                 String principalAuthenticationMethod = serviceInfo.getAuthenticationMethod().getAuthenticationMethod();
 564
 565                 requestContext.setPrincipalAuthenticationMethod(principalAuthenticationMethod);
 566                 queryContext.setPrincipalAuthenticationMethod(principalAuthenticationMethod);
 567             }
 568         }
 569
 570         return queryContext;
 571     }
 572
 573     /**
 574      * Signs the given assertion if either the current profile configuration or the relying party configuration contains
 575      * signing credentials.
 576      *
 577      * @param requestContext current request context
 578      * @param assertion assertion to sign
 579      *
 580      * @throws ProfileException thrown if the metadata can not be located for the relying party or, if signing is
 581      *             required, if a signing credential is not configured
 582      */
 583     protected void signAssertion(SAML2ProfileRequestContext requestContext, Assertion assertion)
 584             throws ProfileException {
 585         if (log.isDebugEnabled()) {
 586             log.debug("Determining if SAML assertion to relying party " + requestContext.getRelyingPartyId()
 587                     + " should be signed");
 588         }
 589
 590         boolean signAssertion = false;
 591
 592         RoleDescriptor relyingPartyRole;
 593         try {
 594             relyingPartyRole = getMetadataProvider().getRole(requestContext.getRelyingPartyId(),
 595                     requestContext.getRelyingPartyRole(), SAMLConstants.SAML20P_NS);
 596         } catch (MetadataProviderException e) {
 597             throw new ProfileException("Unable to lookup entity metadata for relying party "
 598                     + requestContext.getRelyingPartyId());
 599         }
 600         AbstractSAML2ProfileConfiguration profileConfig = requestContext.getProfileConfiguration();
 601
 602         if (relyingPartyRole instanceof SPSSODescriptor) {
 603             SPSSODescriptor ssoDescriptor = (SPSSODescriptor) relyingPartyRole;
 604             if (ssoDescriptor.getWantAssertionsSigned() != null) {
 605                 signAssertion = ssoDescriptor.getWantAssertionsSigned().booleanValue();
 606                 if (log.isDebugEnabled()) {
 607                     log.debug("Entity metadata for relying party " + requestContext.getRelyingPartyId()
 608                             + " indicates to sign assertions: " + signAssertion);
 609                 }
 610             }
 611         } else if (profileConfig.getSignAssertions()) {
 612             signAssertion = true;
 613             log.debug("IdP relying party configuration "
 614                     + requestContext.getRelyingPartyConfiguration().getRelyingPartyId()
 615                     + " indicates to sign assertions: " + signAssertion);
 616         }
 617
 618         if (!signAssertion) {
 619             return;
 620         }
 621
 622         if (log.isDebugEnabled()) {
 623             log.debug("Determining signing credntial for assertion to relying party "
 624                     + requestContext.getRelyingPartyId());
 625         }
 626         Credential signatureCredential = profileConfig.getSigningCredential();
 627         if (signatureCredential == null) {
 628             signatureCredential = requestContext.getRelyingPartyConfiguration().getDefaultSigningCredential();
 629         }
 630
 631         if (signatureCredential == null) {
 632             throw new ProfileException("No signing credential is specified for relying party configuration "
 633                     + requestContext.getRelyingPartyConfiguration().getProviderId()
 634                     + " or it's SAML2 attribute query profile configuration");
 635         }
 636
 637         if (log.isDebugEnabled()) {
 638             log.debug("Signing assertion to relying party " + requestContext.getRelyingPartyId());
 639         }
 640         SAMLObjectContentReference contentRef = new SAMLObjectContentReference(assertion);
 641         Signature signature = signatureBuilder.buildObject(Signature.DEFAULT_ELEMENT_NAME);
 642         signature.getContentReferences().add(contentRef);
 643         assertion.setSignature(signature);
 644
 645         Signer.signObject(signature);
 646     }
 647
 648     /**
 649      * Build a status message, with an optional second-level failure message.
 650      *
 651      * @param topLevelCode The top-level status code. Should be from saml-core-2.0-os, sec. 3.2.2.2
 652      * @param secondLevelCode An optional second-level failure code. Should be from saml-core-2.0-is, sec 3.2.2.2. If
 653      *            null, no second-level Status element will be set.
 654      * @param failureMessage An optional second-level failure message
 655      *
 656      * @return a Status object.
 657      */
 658     protected Status buildStatus(String topLevelCode, String secondLevelCode, String failureMessage) {
 659         Status status = getStatusBuilder().buildObject();
 660
 661         StatusCode statusCode = getStatusCodeBuilder().buildObject();
 662         statusCode.setValue(DatatypeHelper.safeTrimOrNullString(topLevelCode));
 663         status.setStatusCode(statusCode);
 664
 665         if (secondLevelCode != null) {
 666             StatusCode secondLevelStatusCode = getStatusCodeBuilder().buildObject();
 667             secondLevelStatusCode.setValue(DatatypeHelper.safeTrimOrNullString(secondLevelCode));
 668             statusCode.setStatusCode(secondLevelStatusCode);
 669         }
 670
 671         if (failureMessage != null) {
 672             StatusMessage msg = getStatusMessageBuilder().buildObject();
 673             msg.setMessage(failureMessage);
 674             status.setStatusMessage(msg);
 675         }
 676
 677         return status;
 678     }
 679
 680     /**
 681      * Builds the SAML subject for the user for the service provider.
 682      *
 683      * @param requestContext current request context
 684      * @param confirmationMethod subject confirmation method used for the subject
 685      *
 686      * @return SAML subject for the user for the service provider
 687      *
 688      * @throws ProfileException thrown if a NameID can not be created either because there was a problem encoding the
 689      *             name ID attribute or because there are no supported name formats
 690      */
 691     protected Subject buildSubject(SAML2ProfileRequestContext requestContext, String confirmationMethod)
 692             throws ProfileException {
 693         NameID nameID = buildNameId(requestContext);
 694         requestContext.setSubjectNameID(nameID);
 695         // TODO handle encryption
 696
 697         SubjectConfirmation subjectConfirmation = getSubjectConfirmationBuilder().buildObject();
 698         subjectConfirmation.setMethod(confirmationMethod);
 699
 700         Subject subject = getSubjectBuilder().buildObject();
 701         subject.setNameID(nameID);
 702         subject.getSubjectConfirmations().add(subjectConfirmation);
 703
 704         return subject;
 705     }
 706
 707     /**
 708      * Builds a NameID appropriate for this request. NameIDs are built by inspecting the SAML request and metadata,
 709      * picking a name format that was requested by the relying party or is mutually supported by both the relying party
 710      * and asserting party as described in their metadata entries. Once a set of supported name formats is determined
 711      * the principals attributes are inspected for an attribtue supported an attribute encoder whose category is one of
 712      * the supported name formats.
 713      *
 714      * @param requestContext current request context
 715      *
 716      * @return the NameID appropriate for this request
 717      *
 718      * @throws ProfileException thrown if a NameID can not be created either because there was a problem encoding the
 719      *             name ID attribute or because there are no supported name formats
 720      */
 721     protected NameID buildNameId(SAML2ProfileRequestContext requestContext) throws ProfileException {
 722         if (log.isDebugEnabled()) {
 723             log.debug("Building assertion NameID for principal/relying party:" + requestContext.getPrincipalName()
 724                     + "/" + requestContext.getRelyingPartyId());
 725         }
 726         Map<String, BaseAttribute> principalAttributes = requestContext.getPrincipalAttributes();
 727         List<String> supportedNameFormats = getNameFormats(requestContext);
 728
 729         if (log.isDebugEnabled()) {
 730             log.debug("Supported NameID formats: " + supportedNameFormats);
 731         }
 732
 733         if (principalAttributes != null && supportedNameFormats != null) {
 734             try {
 735                 AttributeEncoder<NameID> nameIdEncoder = null;
 736                 for (BaseAttribute attribute : principalAttributes.values()) {
 737                     for (String nameFormat : supportedNameFormats) {
 738                         nameIdEncoder = attribute.getEncoderByCategory(nameFormat);
 739                         if (nameIdEncoder != null) {
 740                             if (log.isDebugEnabled()) {
 741                                 log.debug("Using attribute " + attribute.getId() + " suppoting NameID format "
 742                                         + nameFormat + " to create the NameID for principal "
 743                                         + requestContext.getPrincipalName());
 744                             }
 745                             return nameIdEncoder.encode(attribute);
 746                         }
 747                     }
 748                 }
 749             } catch (AttributeEncodingException e) {
 750                 requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER_URI, null,
 751                         "Unable to construct NameID"));
 752                 throw new ProfileException("Unable to encode NameID attribute", e);
 753             }
 754         }
 755
 756         requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER_URI, StatusCode.INVALID_NAMEID_POLICY_URI,
 757                 "Unable to construct NameID"));
 758         throw new ProfileException("No principal attributes support NameID construction");
 759     }
 760
 761     /**
 762      * Gets the NameID format to use when creating NameIDs for the relying party.
 763      *
 764      * @param requestContext current request context
 765      *
 766      * @return list of nameID formats that may be used with the relying party
 767      *
 768      * @throws ProfileException thrown if there is a problem determing the NameID format to use
 769      */
 770     protected List<String> getNameFormats(SAML2ProfileRequestContext requestContext) throws ProfileException {
 771         ArrayList<String> nameFormats = new ArrayList<String>();
 772
 773         try {
 774             RoleDescriptor assertingPartyRole = getMetadataProvider().getRole(requestContext.getAssertingPartyId(),
 775                     requestContext.getAssertingPartyRole(), SAMLConstants.SAML20P_NS);
 776             List<String> assertingPartySupportedFormats = getEntitySupportedFormats(assertingPartyRole);
 777
 778             String nameFormat = null;
 779             if (requestContext.getSamlRequest() instanceof AuthnRequest) {
 780                 AuthnRequest authnRequest = (AuthnRequest) requestContext.getSamlRequest();
 781                 if (authnRequest.getNameIDPolicy() != null) {
 782                     nameFormat = authnRequest.getNameIDPolicy().getFormat();
 783                     if (assertingPartySupportedFormats.contains(nameFormat)) {
 784                         nameFormats.add(nameFormat);
 785                     } else {
 786                         requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER_URI,
 787                                 StatusCode.INVALID_NAMEID_POLICY_URI, "Format not supported: " + nameFormat));
 788                         throw new ProfileException("NameID format required by relying party is not supported");
 789                     }
 790                 }
 791             }
 792
 793             if (nameFormats.isEmpty()) {
 794                 RoleDescriptor relyingPartyRole = getMetadataProvider().getRole(requestContext.getRelyingPartyId(),
 795                         requestContext.getRelyingPartyRole(), SAMLConstants.SAML20P_NS);
 796                 List<String> relyingPartySupportedFormats = getEntitySupportedFormats(relyingPartyRole);
 797
 798                 assertingPartySupportedFormats.retainAll(relyingPartySupportedFormats);
 799                 nameFormats.addAll(assertingPartySupportedFormats);
 800             }
 801             if (nameFormats.isEmpty()) {
 802                 nameFormats.add("urn:oasis:names:tc:SAML:2.0:nameid-format:unspecified");
 803             }
 804
 805             return nameFormats;
 806
 807         } catch (MetadataProviderException e) {
 808             requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER_URI, null,
 809                     "Unable to lookup entity metadata"));
 810             throw new ProfileException("Unable to determine lookup entity metadata", e);
 811         }
 812     }
 813
 814     /**
 815      * Gets the list of NameID formats supported for a given role.
 816      *
 817      * @param role the role to get the list of supported NameID formats
 818      *
 819      * @return list of supported NameID formats
 820      */
 821     protected List<String> getEntitySupportedFormats(RoleDescriptor role) {
 822         List<NameIDFormat> nameIDFormats = null;
 823
 824         if (role instanceof SSODescriptor) {
 825             nameIDFormats = ((SSODescriptor) role).getNameIDFormats();
 826         } else if (role instanceof AuthnAuthorityDescriptor) {
 827             nameIDFormats = ((AuthnAuthorityDescriptor) role).getNameIDFormats();
 828         } else if (role instanceof PDPDescriptor) {
 829             nameIDFormats = ((PDPDescriptor) role).getNameIDFormats();
 830         } else if (role instanceof AttributeAuthorityDescriptor) {
 831             nameIDFormats = ((AttributeAuthorityDescriptor) role).getNameIDFormats();
 832         }
 833
 834         ArrayList<String> supportedFormats = new ArrayList<String>();
 835         if (nameIDFormats != null) {
 836             for (NameIDFormat format : nameIDFormats) {
 837                 supportedFormats.add(format.getFormat());
 838             }
 839         }
 840
 841         return supportedFormats;
 842     }
 843
 844     /**
 845      * Constructs an SAML response message carrying a request error.
 846      *
 847      * @param requestContext current request context
 848      *
 849      * @return the constructed error response
 850      */
 851     protected Response buildErrorResponse(SAML2ProfileRequestContext requestContext) {
 852         Response samlResponse = getResponseBuilder().buildObject();
 853         samlResponse.setIssueInstant(new DateTime());
 854         populateStatusResponse(requestContext, samlResponse);
 855
 856         samlResponse.setStatus(requestContext.getFailureStatus());
 857
 858         return samlResponse;
 859     }
 860
 861     /**
 862      * Writes an aduit log entry indicating the successful response to the attribute request.
 863      *
 864      * @param context current request context
 865      */
 866     protected void writeAuditLogEntry(SAML2ProfileRequestContext context) {
 867         AuditLogEntry auditLogEntry = new AuditLogEntry();
 868         auditLogEntry.setMessageProfile(getProfileId());
 869         auditLogEntry.setPrincipalAuthenticationMethod(context.getPrincipalAuthenticationMethod());
 870         auditLogEntry.setPrincipalName(context.getPrincipalName());
 871         auditLogEntry.setAssertingPartyId(context.getAssertingPartyId());
 872         auditLogEntry.setRelyingPartyId(context.getRelyingPartyId());
 873         auditLogEntry.setRequestBinding(context.getMessageDecoder().getBindingURI());
 874         auditLogEntry.setRequestId(context.getSamlRequest().getID());
 875         auditLogEntry.setResponseBinding(context.getMessageEncoder().getBindingURI());
 876         auditLogEntry.setResponseId(context.getSamlResponse().getID());
 877         getAduitLog().log(Level.CRITICAL, auditLogEntry);
 878     }
 879
 880     /**
 881      * Contextual object used to accumlate information as profile requests are being processed.
 882      *
 883      * @param <RequestType> type of SAML 2 request
 884      * @param <ResponseType> type of SAML 2 response
 885      * @param <ProfileConfigurationType> configuration type for this profile
 886      */
 887     protected class SAML2ProfileRequestContext<RequestType extends RequestAbstractType, ResponseType extends StatusResponseType, ProfileConfigurationType extends AbstractSAML2ProfileConfiguration>
 888             extends SAMLProfileRequestContext {
 889
 890         /** SAML request message. */
 891         private RequestType samlRequest;
 892
 893         /** SAML response message. */
 894         private ResponseType samlResponse;
 895
 896         /** Request profile configuration. */
 897         private ProfileConfigurationType profileConfiguration;
 898
 899         /** The NameID of the subject of this request. */
 900         private NameID subjectNameID;
 901
 902         /** The request failure status. */
 903         private Status failureStatus;
 904
 905         /**
 906          * Constructor.
 907          *
 908          * @param request current profile request
 909          * @param response current profile response
 910          */
 911         public SAML2ProfileRequestContext(ProfileRequest<ServletRequest> request,
 912                 ProfileResponse<ServletResponse> response) {
 913             super(request, response);
 914         }
 915
 916         /**
 917          * Gets the NameID of the subject of this request.
 918          *
 919          * @return NameID of the subject of this request
 920          */
 921         public NameID getSubjectNameID() {
 922             return subjectNameID;
 923         }
 924
 925         /**
 926          * Sets the NameID of the subject of this request.
 927          *
 928          * @param nameID NameID of the subject of this request
 929          */
 930         public void setSubjectNameID(NameID nameID) {
 931             subjectNameID = nameID;
 932         }
 933
 934         /**
 935          * Gets the profile configuration for this request.
 936          *
 937          * @return profile configuration for this request
 938          */
 939         public ProfileConfigurationType getProfileConfiguration() {
 940             return profileConfiguration;
 941         }
 942
 943         /**
 944          * Sets the profile configuration for this request.
 945          *
 946          * @param configuration profile configuration for this request
 947          */
 948         public void setProfileConfiguration(ProfileConfigurationType configuration) {
 949             profileConfiguration = configuration;
 950         }
 951
 952         /**
 953          * Gets the SAML request message.
 954          *
 955          * @return SAML request message
 956          */
 957         public RequestType getSamlRequest() {
 958             return samlRequest;
 959         }
 960
 961         /**
 962          * Sets the SAML request message.
 963          *
 964          * @param request SAML request message
 965          */
 966         public void setSamlRequest(RequestType request) {
 967             samlRequest = request;
 968         }
 969
 970         /**
 971          * Gets the SAML response message.
 972          *
 973          * @return SAML response message
 974          */
 975         public ResponseType getSamlResponse() {
 976             return samlResponse;
 977         }
 978
 979         /**
 980          * Sets the SAML response message.
 981          *
 982          * @param response SAML response message
 983          */
 984         public void setSamlResponse(ResponseType response) {
 985             samlResponse = response;
 986         }
 987
 988         /**
 989          * Gets the status reflecting a request failure.
 990          *
 991          * @return status reflecting a request failure
 992          */
 993         public Status getFailureStatus() {
 994             return failureStatus;
 995         }
 996
 997         /**
 998          * Sets the status reflecting a request failure.
 999          *
1000          * @param status status reflecting a request failure
1001          */
1002         public void setFailureStatus(Status status) {
1003             failureStatus = status;
1004         }
1005     }
1006 }