src/edu/internet2/middleware/shibboleth/idp/profile/saml1/ShibbolethSSOProfileHandler.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.saml1;
  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.HttpServletResponse;
  26 import javax.servlet.http.HttpSession;
  27
  28 import org.opensaml.common.SAMLObjectBuilder;
  29 import org.opensaml.common.binding.decoding.SAMLMessageDecoder;
  30 import org.opensaml.common.xml.SAMLConstants;
  31 import org.opensaml.saml1.core.AttributeStatement;
  32 import org.opensaml.saml1.core.AuthenticationStatement;
  33 import org.opensaml.saml1.core.Request;
  34 import org.opensaml.saml1.core.Response;
  35 import org.opensaml.saml1.core.Statement;
  36 import org.opensaml.saml1.core.StatusCode;
  37 import org.opensaml.saml1.core.Subject;
  38 import org.opensaml.saml1.core.SubjectLocality;
  39 import org.opensaml.saml2.metadata.AssertionConsumerService;
  40 import org.opensaml.saml2.metadata.Endpoint;
  41 import org.opensaml.saml2.metadata.EntityDescriptor;
  42 import org.opensaml.saml2.metadata.IDPSSODescriptor;
  43 import org.opensaml.saml2.metadata.SPSSODescriptor;
  44 import org.opensaml.saml2.metadata.provider.MetadataProvider;
  45 import org.opensaml.saml2.metadata.provider.MetadataProviderException;
  46 import org.opensaml.ws.message.decoder.MessageDecodingException;
  47 import org.opensaml.ws.transport.http.HTTPInTransport;
  48 import org.opensaml.ws.transport.http.HTTPOutTransport;
  49 import org.opensaml.ws.transport.http.HttpServletRequestAdapter;
  50 import org.opensaml.ws.transport.http.HttpServletResponseAdapter;
  51 import org.opensaml.xml.security.SecurityException;
  52 import org.opensaml.xml.util.DatatypeHelper;
  53 import org.slf4j.Logger;
  54 import org.slf4j.LoggerFactory;
  55
  56 import edu.internet2.middleware.shibboleth.common.ShibbolethConstants;
  57 import edu.internet2.middleware.shibboleth.common.profile.ProfileException;
  58 import edu.internet2.middleware.shibboleth.common.relyingparty.ProfileConfiguration;
  59 import edu.internet2.middleware.shibboleth.common.relyingparty.RelyingPartyConfiguration;
  60 import edu.internet2.middleware.shibboleth.common.relyingparty.provider.saml1.ShibbolethSSOConfiguration;
  61 import edu.internet2.middleware.shibboleth.common.util.HttpHelper;
  62 import edu.internet2.middleware.shibboleth.idp.authn.LoginContext;
  63 import edu.internet2.middleware.shibboleth.idp.authn.ShibbolethSSOLoginContext;
  64
  65 /** Shibboleth SSO request profile handler. */
  66 public class ShibbolethSSOProfileHandler extends AbstractSAML1ProfileHandler {
  67
  68     /** Class logger. */
  69     private final Logger log = LoggerFactory.getLogger(ShibbolethSSOProfileHandler.class);
  70
  71     /** Builder of AuthenticationStatement objects. */
  72     private SAMLObjectBuilder<AuthenticationStatement> authnStatementBuilder;
  73
  74     /** Builder of SubjectLocality objects. */
  75     private SAMLObjectBuilder<SubjectLocality> subjectLocalityBuilder;
  76
  77     /** URL of the authentication manager servlet. */
  78     private String authenticationManagerPath;
  79
  80     /**
  81      * Constructor.
  82      *
  83      * @param authnManagerPath path to the authentication manager servlet
  84      *
  85      * @throws IllegalArgumentException thrown if either the authentication manager path or encoding binding URI are
  86      *             null or empty
  87      */
  88     public ShibbolethSSOProfileHandler(String authnManagerPath) {
  89         if (DatatypeHelper.isEmpty(authnManagerPath)) {
  90             throw new IllegalArgumentException("Authentication manager path may not be null");
  91         }
  92         authenticationManagerPath = authnManagerPath;
  93
  94         authnStatementBuilder = (SAMLObjectBuilder<AuthenticationStatement>) getBuilderFactory().getBuilder(
  95                 AuthenticationStatement.DEFAULT_ELEMENT_NAME);
  96
  97         subjectLocalityBuilder = (SAMLObjectBuilder<SubjectLocality>) getBuilderFactory().getBuilder(
  98                 SubjectLocality.DEFAULT_ELEMENT_NAME);
  99     }
 100
 101     /** {@inheritDoc} */
 102     public String getProfileId() {
 103         return "urn:mace:shibboleth:2.0:idp:profiles:shibboleth:request:sso";
 104     }
 105
 106     /** {@inheritDoc} */
 107     public void processRequest(HTTPInTransport inTransport, HTTPOutTransport outTransport) throws ProfileException {
 108         log.debug("Processing incoming request");
 109
 110         HttpServletRequest httpRequest = ((HttpServletRequestAdapter) inTransport).getWrappedRequest();
 111         LoginContext loginContext = (LoginContext) httpRequest.getAttribute(LoginContext.LOGIN_CONTEXT_KEY);
 112
 113         if (loginContext == null) {
 114             log.debug("User session does not contain a login context, processing as first leg of request");
 115             performAuthentication(inTransport, outTransport);
 116         } else if (!loginContext.isPrincipalAuthenticated() && !loginContext.getAuthenticationAttempted()) {
 117             log.debug("User session contained a login context but user was not authenticated, processing as first leg of request");
 118             performAuthentication(inTransport, outTransport);
 119         } else {
 120             log.debug("User session contains a login context, processing as second leg of request");
 121             completeAuthenticationRequest(inTransport, outTransport);
 122         }
 123     }
 124
 125     /**
 126      * Creates a {@link LoginContext} an sends the request off to the AuthenticationManager to begin the process of
 127      * authenticating the user.
 128      *
 129      * @param inTransport inbound message transport
 130      * @param outTransport outbound message transport
 131      *
 132      * @throws ProfileException thrown if there is a problem creating the login context and transferring control to the
 133      *             authentication manager
 134      */
 135     protected void performAuthentication(HTTPInTransport inTransport, HTTPOutTransport outTransport)
 136             throws ProfileException {
 137
 138         HttpServletRequest httpRequest = ((HttpServletRequestAdapter) inTransport).getWrappedRequest();
 139         HttpServletResponse httpResponse = ((HttpServletResponseAdapter) outTransport).getWrappedResponse();
 140
 141         ShibbolethSSORequestContext requestContext = decodeRequest(inTransport, outTransport);
 142         ShibbolethSSOLoginContext loginContext = requestContext.getLoginContext();
 143
 144         RelyingPartyConfiguration rpConfig = getRelyingPartyConfiguration(loginContext.getRelyingPartyId());
 145         ProfileConfiguration ssoConfig = rpConfig.getProfileConfiguration(ShibbolethSSOConfiguration.PROFILE_ID);
 146         if (ssoConfig == null) {
 147             log.error("Shibboleth SSO profile is not configured for relying party " + loginContext.getRelyingPartyId());
 148             throw new ProfileException("Shibboleth SSO profile is not configured for relying party "
 149                     + loginContext.getRelyingPartyId());
 150         }
 151         loginContext.getRequestedAuthenticationMethods().add(rpConfig.getDefaultAuthenticationMethod());
 152
 153         httpRequest.setAttribute(LoginContext.LOGIN_CONTEXT_KEY, loginContext);
 154
 155         try {
 156             RequestDispatcher dispatcher = httpRequest.getRequestDispatcher(authenticationManagerPath);
 157             dispatcher.forward(httpRequest, httpResponse);
 158             return;
 159         } catch (IOException ex) {
 160             log.error("Error forwarding Shibboleth SSO request to AuthenticationManager", ex);
 161             throw new ProfileException("Error forwarding Shibboleth SSO request to AuthenticationManager", ex);
 162         } catch (ServletException ex) {
 163             log.error("Error forwarding Shibboleth SSO request to AuthenticationManager", ex);
 164             throw new ProfileException("Error forwarding Shibboleth SSO request to AuthenticationManager", ex);
 165         }
 166     }
 167
 168     /**
 169      * Decodes an incoming request and populates a created request context with the resultant information.
 170      *
 171      * @param inTransport inbound message transport
 172      * @param outTransport outbound message transport
 173      *
 174      * @return the created request context
 175      *
 176      * @throws ProfileException throw if there is a problem decoding the request
 177      */
 178     protected ShibbolethSSORequestContext decodeRequest(HTTPInTransport inTransport, HTTPOutTransport outTransport)
 179             throws ProfileException {
 180         log.debug("Decoding message with decoder binding {}", getInboundBinding());
 181
 182         HttpServletRequest httpRequest = ((HttpServletRequestAdapter) inTransport).getWrappedRequest();
 183
 184         ShibbolethSSORequestContext requestContext = new ShibbolethSSORequestContext();
 185         requestContext.setMetadataProvider(getMetadataProvider());
 186         requestContext.setSecurityPolicyResolver(getSecurityPolicyResolver());
 187
 188         requestContext.setCommunicationProfileId(ShibbolethSSOConfiguration.PROFILE_ID);
 189         requestContext.setInboundMessageTransport(inTransport);
 190         requestContext.setInboundSAMLProtocol(ShibbolethConstants.SHIB_SSO_PROFILE_URI);
 191         requestContext.setPeerEntityRole(SPSSODescriptor.DEFAULT_ELEMENT_NAME);
 192
 193         requestContext.setOutboundMessageTransport(outTransport);
 194         requestContext.setOutboundSAMLProtocol(SAMLConstants.SAML11P_NS);
 195
 196         SAMLMessageDecoder decoder = getMessageDecoders().get(getInboundBinding());
 197         requestContext.setMessageDecoder(decoder);
 198         try {
 199             decoder.decode(requestContext);
 200         } catch (MessageDecodingException e) {
 201             log.error("Error decoding Shibboleth SSO request", e);
 202             throw new ProfileException("Error decoding Shibboleth SSO request", e);
 203         } catch (SecurityException e) {
 204             log.error("Shibboleth SSO request does not meet security requirements", e);
 205             throw new ProfileException("Shibboleth SSO request does not meet security requirements", e);
 206         }
 207
 208         ShibbolethSSOLoginContext loginContext = new ShibbolethSSOLoginContext();
 209         loginContext.setRelyingParty(requestContext.getInboundMessageIssuer());
 210         loginContext.setSpAssertionConsumerService(requestContext.getSpAssertionConsumerService());
 211         loginContext.setSpTarget(requestContext.getRelayState());
 212         loginContext.setAuthenticationEngineURL(authenticationManagerPath);
 213         loginContext.setProfileHandlerURL(HttpHelper.getRequestUriWithoutContext(httpRequest));
 214
 215         requestContext.setLoginContext(loginContext);
 216
 217         return requestContext;
 218     }
 219
 220     /**
 221      * Creates a response to the Shibboleth SSO and sends the user, with response in tow, back to the relying party
 222      * after they've been authenticated.
 223      *
 224      * @param inTransport inbound message transport
 225      * @param outTransport outbound message transport
 226      *
 227      * @throws ProfileException thrown if the response can not be created and sent back to the relying party
 228      */
 229     protected void completeAuthenticationRequest(HTTPInTransport inTransport, HTTPOutTransport outTransport)
 230             throws ProfileException {
 231         HttpServletRequest httpRequest = ((HttpServletRequestAdapter) inTransport).getWrappedRequest();
 232         HttpSession httpSession = httpRequest.getSession(true);
 233
 234         ShibbolethSSOLoginContext loginContext = (ShibbolethSSOLoginContext) httpSession
 235                 .getAttribute(LoginContext.LOGIN_CONTEXT_KEY);
 236         httpSession.removeAttribute(LoginContext.LOGIN_CONTEXT_KEY);
 237
 238         ShibbolethSSORequestContext requestContext = buildRequestContext(loginContext, inTransport, outTransport);
 239
 240         Response samlResponse;
 241         try {
 242             if (loginContext.getAuthenticationFailure() != null) {
 243                 log.error("User authentication failed with the following error: {}", loginContext
 244                         .getAuthenticationFailure().toString());
 245                 requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER, null, "User failed authentication"));
 246             }
 247
 248             resolveAttributes(requestContext);
 249
 250             ArrayList<Statement> statements = new ArrayList<Statement>();
 251             statements.add(buildAuthenticationStatement(requestContext));
 252             if (requestContext.getProfileConfiguration().includeAttributeStatement()) {
 253                 AttributeStatement attributeStatement = buildAttributeStatement(requestContext,
 254                         "urn:oasis:names:tc:SAML:1.0:cm:bearer");
 255                 if (attributeStatement != null) {
 256                     requestContext.setRequestedAttributes(requestContext.getPrincipalAttributes().keySet());
 257                     statements.add(attributeStatement);
 258                 }
 259             }
 260
 261             samlResponse = buildResponse(requestContext, statements);
 262         } catch (ProfileException e) {
 263             samlResponse = buildErrorResponse(requestContext);
 264         }
 265
 266         requestContext.setOutboundSAMLMessage(samlResponse);
 267         requestContext.setOutboundSAMLMessageId(samlResponse.getID());
 268         requestContext.setOutboundSAMLMessageIssueInstant(samlResponse.getIssueInstant());
 269         encodeResponse(requestContext);
 270         writeAuditLogEntry(requestContext);
 271     }
 272
 273     /**
 274      * Creates an authentication request context from the current environmental information.
 275      *
 276      * @param loginContext current login context
 277      * @param in inbound transport
 278      * @param out outbount transport
 279      *
 280      * @return created authentication request context
 281      *
 282      * @throws ProfileException thrown if there is a problem creating the context
 283      */
 284     protected ShibbolethSSORequestContext buildRequestContext(ShibbolethSSOLoginContext loginContext,
 285             HTTPInTransport in, HTTPOutTransport out) throws ProfileException {
 286         ShibbolethSSORequestContext requestContext = new ShibbolethSSORequestContext();
 287
 288         requestContext.setMessageDecoder(getMessageDecoders().get(getInboundBinding()));
 289
 290         requestContext.setLoginContext(loginContext);
 291         requestContext.setPrincipalName(loginContext.getPrincipalName());
 292         requestContext.setPrincipalAuthenticationMethod(loginContext.getAuthenticationMethod());
 293         requestContext.setUserSession(getUserSession(in));
 294         requestContext.setRelayState(loginContext.getSpTarget());
 295
 296         requestContext.setInboundMessageTransport(in);
 297         requestContext.setInboundSAMLProtocol(ShibbolethConstants.SHIB_SSO_PROFILE_URI);
 298
 299         requestContext.setOutboundMessageTransport(out);
 300         requestContext.setOutboundSAMLProtocol(SAMLConstants.SAML20P_NS);
 301
 302         MetadataProvider metadataProvider = getMetadataProvider();
 303         requestContext.setMetadataProvider(metadataProvider);
 304
 305         String relyingPartyId = loginContext.getRelyingPartyId();
 306         requestContext.setInboundMessageIssuer(relyingPartyId);
 307
 308         try {
 309             EntityDescriptor relyingPartyMetadata = metadataProvider.getEntityDescriptor(relyingPartyId);
 310             if (relyingPartyMetadata != null) {
 311                 requestContext.setPeerEntityMetadata(relyingPartyMetadata);
 312                 requestContext.setPeerEntityRole(SPSSODescriptor.DEFAULT_ELEMENT_NAME);
 313                 requestContext.setPeerEntityRoleMetadata(relyingPartyMetadata
 314                         .getSPSSODescriptor(SAMLConstants.SAML11P_NS));
 315             }
 316         } catch (MetadataProviderException e) {
 317             log.error("Unable to locate metadata for relying party");
 318             requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER, null,
 319                     "Error locating relying party metadata"));
 320             throw new ProfileException("Error locating relying party metadata");
 321         }
 322
 323         RelyingPartyConfiguration rpConfig = getRelyingPartyConfiguration(relyingPartyId);
 324         if (rpConfig == null) {
 325             log.error("Unable to retrieve relying party configuration data for entity with ID {}", relyingPartyId);
 326             throw new ProfileException("Unable to retrieve relying party configuration data for entity with ID "
 327                     + relyingPartyId);
 328         }
 329         requestContext.setRelyingPartyConfiguration(rpConfig);
 330
 331         ShibbolethSSOConfiguration profileConfig = (ShibbolethSSOConfiguration) rpConfig
 332                 .getProfileConfiguration(ShibbolethSSOConfiguration.PROFILE_ID);
 333         requestContext.setProfileConfiguration(profileConfig);
 334         requestContext.setOutboundMessageArtifactType(profileConfig.getOutboundArtifactType());
 335         requestContext.setPeerEntityEndpoint(selectEndpoint(requestContext));
 336
 337         String assertingPartyId = rpConfig.getProviderId();
 338         requestContext.setLocalEntityId(assertingPartyId);
 339         requestContext.setOutboundMessageIssuer(assertingPartyId);
 340         try {
 341             EntityDescriptor localEntityDescriptor = metadataProvider.getEntityDescriptor(assertingPartyId);
 342             if (localEntityDescriptor != null) {
 343                 requestContext.setLocalEntityMetadata(localEntityDescriptor);
 344                 requestContext.setLocalEntityRole(IDPSSODescriptor.DEFAULT_ELEMENT_NAME);
 345                 requestContext.setLocalEntityRoleMetadata(localEntityDescriptor
 346                         .getIDPSSODescriptor(SAMLConstants.SAML20P_NS));
 347             }
 348         } catch (MetadataProviderException e) {
 349             log.error("Unable to locate metadata for asserting party");
 350             requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER, null,
 351                     "Error locating asserting party metadata"));
 352             throw new ProfileException("Error locating asserting party metadata");
 353         }
 354
 355         return requestContext;
 356     }
 357
 358     /**
 359      * Selects the appropriate endpoint for the relying party and stores it in the request context.
 360      *
 361      * @param requestContext current request context
 362      *
 363      * @return Endpoint selected from the information provided in the request context
 364      */
 365     protected Endpoint selectEndpoint(ShibbolethSSORequestContext requestContext) {
 366         ShibbolethSSOLoginContext loginContext = requestContext.getLoginContext();
 367
 368         ShibbolethSSOEndpointSelector endpointSelector = new ShibbolethSSOEndpointSelector();
 369         endpointSelector.setSpAssertionConsumerService(loginContext.getSpAssertionConsumerService());
 370         endpointSelector.setEndpointType(AssertionConsumerService.DEFAULT_ELEMENT_NAME);
 371         endpointSelector.setMetadataProvider(getMetadataProvider());
 372         endpointSelector.setEntityMetadata(requestContext.getPeerEntityMetadata());
 373         endpointSelector.setEntityRoleMetadata(requestContext.getPeerEntityRoleMetadata());
 374         endpointSelector.setSamlRequest(requestContext.getInboundSAMLMessage());
 375         endpointSelector.getSupportedIssuerBindings().addAll(getSupportedOutboundBindings());
 376
 377         return endpointSelector.selectEndpoint();
 378     }
 379
 380     /**
 381      * Builds the authentication statement for the authenticated principal.
 382      *
 383      * @param requestContext current request context
 384      *
 385      * @return the created statement
 386      *
 387      * @throws ProfileException thrown if the authentication statement can not be created
 388      */
 389     protected AuthenticationStatement buildAuthenticationStatement(ShibbolethSSORequestContext requestContext)
 390             throws ProfileException {
 391         ShibbolethSSOLoginContext loginContext = requestContext.getLoginContext();
 392
 393         AuthenticationStatement statement = authnStatementBuilder.buildObject();
 394         statement.setAuthenticationInstant(loginContext.getAuthenticationInstant());
 395         statement.setAuthenticationMethod(loginContext.getAuthenticationMethod());
 396
 397         statement.setSubjectLocality(buildSubjectLocality(requestContext));
 398
 399         Subject statementSubject = buildSubject(requestContext, "urn:oasis:names:tc:SAML:1.0:cm:bearer");
 400         statement.setSubject(statementSubject);
 401
 402         return statement;
 403     }
 404
 405     /**
 406      * Constructs the subject locality for the authentication statement.
 407      *
 408      * @param requestContext curent request context
 409      *
 410      * @return subject locality for the authentication statement
 411      */
 412     protected SubjectLocality buildSubjectLocality(ShibbolethSSORequestContext requestContext) {
 413         SubjectLocality subjectLocality = subjectLocalityBuilder.buildObject();
 414
 415         HTTPInTransport inTransport = (HTTPInTransport) requestContext.getInboundMessageTransport();
 416         subjectLocality.setIPAddress(inTransport.getPeerAddress());
 417         subjectLocality.setDNSAddress(inTransport.getPeerDomainName());
 418
 419         return subjectLocality;
 420     }
 421
 422     /** Represents the internal state of a Shibboleth SSO Request while it's being processed by the IdP. */
 423     public class ShibbolethSSORequestContext extends
 424             BaseSAML1ProfileRequestContext<Request, Response, ShibbolethSSOConfiguration> {
 425
 426         /** SP-provide assertion consumer service URL. */
 427         private String spAssertionConsumerService;
 428
 429         /** Current login context. */
 430         private ShibbolethSSOLoginContext loginContext;
 431
 432         /**
 433          * Gets the current login context.
 434          *
 435          * @return current login context
 436          */
 437         public ShibbolethSSOLoginContext getLoginContext() {
 438             return loginContext;
 439         }
 440
 441         /**
 442          * Sets the current login context.
 443          *
 444          * @param context current login context
 445          */
 446         public void setLoginContext(ShibbolethSSOLoginContext context) {
 447             loginContext = context;
 448         }
 449
 450         /**
 451          * Gets the SP-provided assertion consumer service URL.
 452          *
 453          * @return SP-provided assertion consumer service URL
 454          */
 455         public String getSpAssertionConsumerService() {
 456             return spAssertionConsumerService;
 457         }
 458
 459         /**
 460          * Sets the SP-provided assertion consumer service URL.
 461          *
 462          * @param acs SP-provided assertion consumer service URL
 463          */
 464         public void setSpAssertionConsumerService(String acs) {
 465             spAssertionConsumerService = acs;
 466         }
 467     }
 468 }