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.apache.log4j.Logger;
  29 import org.opensaml.common.SAMLObjectBuilder;
  30 import org.opensaml.common.binding.decoding.SAMLMessageDecoder;
  31 import org.opensaml.common.xml.SAMLConstants;
  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.security.SecurityPolicyException;
  48 import org.opensaml.ws.transport.http.HTTPInTransport;
  49 import org.opensaml.ws.transport.http.HTTPOutTransport;
  50 import org.opensaml.ws.transport.http.HttpServletRequestAdapter;
  51 import org.opensaml.ws.transport.http.HttpServletResponseAdapter;
  52 import org.opensaml.xml.util.DatatypeHelper;
  53
  54 import edu.internet2.middleware.shibboleth.common.ShibbolethConstants;
  55 import edu.internet2.middleware.shibboleth.common.profile.ProfileException;
  56 import edu.internet2.middleware.shibboleth.common.relyingparty.ProfileConfiguration;
  57 import edu.internet2.middleware.shibboleth.common.relyingparty.RelyingPartyConfiguration;
  58 import edu.internet2.middleware.shibboleth.common.relyingparty.provider.saml1.ShibbolethSSOConfiguration;
  59 import edu.internet2.middleware.shibboleth.common.util.HttpHelper;
  60 import edu.internet2.middleware.shibboleth.idp.authn.LoginContext;
  61 import edu.internet2.middleware.shibboleth.idp.authn.ShibbolethSSOLoginContext;
  62
  63 /** Shibboleth SSO request profile handler. */
  64 public class ShibbolethSSOProfileHandler extends AbstractSAML1ProfileHandler {
  65
  66     /** Class logger. */
  67     private final Logger log = Logger.getLogger(ShibbolethSSOProfileHandler.class);
  68
  69     /** Builder of AuthenticationStatement objects. */
  70     private SAMLObjectBuilder<AuthenticationStatement> authnStatementBuilder;
  71
  72     /** Builder of SubjectLocality objects. */
  73     private SAMLObjectBuilder<SubjectLocality> subjectLocalityBuilder;
  74
  75     /** URL of the authentication manager servlet. */
  76     private String authenticationManagerPath;
  77
  78     /**
  79      * Constructor.
  80      *
  81      * @param authnManagerPath path to the authentication manager servlet
  82      *
  83      * @throws IllegalArgumentException thrown if either the authentication manager path or encoding binding URI are
  84      *             null or empty
  85      */
  86     public ShibbolethSSOProfileHandler(String authnManagerPath) {
  87         if (DatatypeHelper.isEmpty(authnManagerPath)) {
  88             throw new IllegalArgumentException("Authentication manager path may not be null");
  89         }
  90         authenticationManagerPath = authnManagerPath;
  91
  92         authnStatementBuilder = (SAMLObjectBuilder<AuthenticationStatement>) getBuilderFactory().getBuilder(
  93                 AuthenticationStatement.DEFAULT_ELEMENT_NAME);
  94
  95         subjectLocalityBuilder = (SAMLObjectBuilder<SubjectLocality>) getBuilderFactory().getBuilder(
  96                 SubjectLocality.DEFAULT_ELEMENT_NAME);
  97     }
  98
  99     /** {@inheritDoc} */
 100     public String getProfileId() {
 101         return "urn:mace:shibboleth:2.0:idp:profiles:shibboleth:request:sso";
 102     }
 103
 104     /** {@inheritDoc} */
 105     public void processRequest(HTTPInTransport inTransport, HTTPOutTransport outTransport) throws ProfileException {
 106         if (log.isDebugEnabled()) {
 107             log.debug("Processing incomming request");
 108         }
 109
 110         HttpServletRequest httpRequest = ((HttpServletRequestAdapter) inTransport).getWrappedRequest();
 111         HttpSession httpSession = httpRequest.getSession();
 112
 113         if (httpSession.getAttribute(LoginContext.LOGIN_CONTEXT_KEY) == null) {
 114             if (log.isDebugEnabled()) {
 115                 log.debug("User session does not contain a login context, processing as first leg of request");
 116             }
 117             performAuthentication(inTransport, outTransport);
 118         } else {
 119             if (log.isDebugEnabled()) {
 120                 log.debug("User session contains a login context, processing as second leg of request");
 121             }
 122             completeAuthenticationRequest(inTransport, outTransport);
 123         }
 124     }
 125
 126     /**
 127      * Creates a {@link LoginContext} an sends the request off to the AuthenticationManager to begin the process of
 128      * authenticating the user.
 129      *
 130      * @param inTransport inbound message transport
 131      * @param outTransport outbound message transport
 132      *
 133      * @throws ProfileException thrown if there is a problem creating the login context and transferring control to the
 134      *             authentication manager
 135      */
 136     protected void performAuthentication(HTTPInTransport inTransport, HTTPOutTransport outTransport)
 137             throws ProfileException {
 138
 139         HttpServletRequest httpRequest = ((HttpServletRequestAdapter) inTransport).getWrappedRequest();
 140         HttpServletResponse httpResponse = ((HttpServletResponseAdapter) outTransport).getWrappedResponse();
 141         HttpSession httpSession = httpRequest.getSession(true);
 142
 143         ShibbolethSSORequestContext requestContext = decodeRequest(inTransport, outTransport);
 144         ShibbolethSSOLoginContext loginContext = requestContext.getLoginContext();
 145
 146         RelyingPartyConfiguration rpConfig = getRelyingPartyConfiguration(loginContext.getRelyingPartyId());
 147         ProfileConfiguration ssoConfig = rpConfig.getProfileConfiguration(ShibbolethSSOConfiguration.PROFILE_ID);
 148         if (ssoConfig == null) {
 149             log.error("Shibboleth SSO profile is not configured for relying party " + loginContext.getRelyingPartyId());
 150             throw new ProfileException("Shibboleth SSO profile is not configured for relying party "
 151                     + loginContext.getRelyingPartyId());
 152         }
 153         loginContext.getRequestedAuthenticationMethods().add(rpConfig.getDefaultAuthenticationMethod());
 154
 155         httpSession.setAttribute(LoginContext.LOGIN_CONTEXT_KEY, loginContext);
 156
 157         try {
 158             RequestDispatcher dispatcher = httpRequest.getRequestDispatcher(authenticationManagerPath);
 159             dispatcher.forward(httpRequest, httpResponse);
 160             return;
 161         } catch (IOException ex) {
 162             log.error("Error forwarding Shibboleth SSO request to AuthenticationManager", ex);
 163             throw new ProfileException("Error forwarding Shibboleth SSO request to AuthenticationManager", ex);
 164         } catch (ServletException ex) {
 165             log.error("Error forwarding Shibboleth SSO request to AuthenticationManager", ex);
 166             throw new ProfileException("Error forwarding Shibboleth SSO request to AuthenticationManager", ex);
 167         }
 168     }
 169
 170     /**
 171      * Decodes an incoming request and populates a created request context with the resultant information.
 172      *
 173      * @param inTransport inbound message transport
 174      * @param outTransport outbound message transport
 175      *
 176      * @return the created request context
 177      *
 178      * @throws ProfileException throw if there is a problem decoding the request
 179      */
 180     protected ShibbolethSSORequestContext decodeRequest(HTTPInTransport inTransport, HTTPOutTransport outTransport)
 181             throws ProfileException {
 182         HttpServletRequest httpRequest = ((HttpServletRequestAdapter) inTransport).getWrappedRequest();
 183
 184         ShibbolethSSORequestContext requestContext = new ShibbolethSSORequestContext();
 185         requestContext.setMetadataProvider(getMetadataProvider());
 186
 187         requestContext.setInboundMessageTransport(inTransport);
 188         requestContext.setInboundSAMLProtocol(ShibbolethConstants.SHIB_SSO_PROFILE_URI);
 189         requestContext.setPeerEntityRole(SPSSODescriptor.DEFAULT_ELEMENT_NAME);
 190
 191         requestContext.setOutboundMessageTransport(outTransport);
 192         requestContext.setOutboundSAMLProtocol(SAMLConstants.SAML11P_NS);
 193
 194         SAMLMessageDecoder decoder = getMessageDecoders().get(getInboundBinding());
 195         requestContext.setMessageDecoder(decoder);
 196         try {
 197             decoder.decode(requestContext);
 198         } catch (MessageDecodingException e) {
 199             log.error("Error decoding Shibboleth SSO request", e);
 200             throw new ProfileException("Error decoding Shibboleth SSO request", e);
 201         } catch (SecurityPolicyException e) {
 202             log.error("Shibboleth SSO request does not meet security policy requirements", e);
 203             throw new ProfileException("Shibboleth SSO request does not meet security policy requirements", e);
 204         }
 205
 206         ShibbolethSSOLoginContext loginContext = new ShibbolethSSOLoginContext();
 207         loginContext.setRelyingParty(requestContext.getInboundMessageIssuer());
 208         loginContext.setSpAssertionConsumerService(requestContext.getSpAssertionConsumerService());
 209         loginContext.setSpTarget(requestContext.getRelayState());
 210         loginContext.setAuthenticationEngineURL(authenticationManagerPath);
 211         loginContext.setProfileHandlerURL(HttpHelper.getRequestUriWithoutContext(httpRequest));
 212
 213         requestContext.setLoginContext(loginContext);
 214
 215         return requestContext;
 216     }
 217
 218     /**
 219      * Creates a response to the Shibboleth SSO and sends the user, with response in tow, back to the relying party
 220      * after they've been authenticated.
 221      *
 222      * @param inTransport inbound message transport
 223      * @param outTransport outbound message transport
 224      *
 225      * @throws ProfileException thrown if the response can not be created and sent back to the relying party
 226      */
 227     protected void completeAuthenticationRequest(HTTPInTransport inTransport, HTTPOutTransport outTransport)
 228             throws ProfileException {
 229         HttpServletRequest httpRequest = ((HttpServletRequestAdapter) inTransport).getWrappedRequest();
 230         HttpSession httpSession = httpRequest.getSession(true);
 231
 232         ShibbolethSSOLoginContext loginContext = (ShibbolethSSOLoginContext) httpSession
 233                 .getAttribute(LoginContext.LOGIN_CONTEXT_KEY);
 234         httpSession.removeAttribute(LoginContext.LOGIN_CONTEXT_KEY);
 235
 236         ShibbolethSSORequestContext requestContext = buildRequestContext(loginContext, inTransport, outTransport);
 237
 238         Response samlResponse;
 239         try {
 240             if (loginContext.getPrincipalName() == null) {
 241                 requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER, null, "User failed authentication"));
 242                 throw new ProfileException("User failed authentication");
 243             }
 244
 245             resolveAttributes(requestContext);
 246
 247             ArrayList<Statement> statements = new ArrayList<Statement>();
 248             statements.add(buildAuthenticationStatement(requestContext));
 249             if (requestContext.getProfileConfiguration().includeAttributeStatement()) {
 250                 requestContext.setRequestedAttributes(requestContext.getPrincipalAttributes().keySet());
 251                 statements.add(buildAttributeStatement(requestContext, "urn:oasis:names:tc:SAML:1.0:cm:bearer"));
 252             }
 253
 254             samlResponse = buildResponse(requestContext, statements);
 255         } catch (ProfileException e) {
 256             samlResponse = buildErrorResponse(requestContext);
 257         }
 258
 259         requestContext.setOutboundSAMLMessage(samlResponse);
 260         requestContext.setOutboundSAMLMessageId(samlResponse.getID());
 261         requestContext.setOutboundSAMLMessageIssueInstant(samlResponse.getIssueInstant());
 262         encodeResponse(requestContext);
 263         writeAuditLogEntry(requestContext);
 264     }
 265
 266     /**
 267      * Creates an authentication request context from the current environmental information.
 268      *
 269      * @param loginContext current login context
 270      * @param in inbound transport
 271      * @param out outbount transport
 272      *
 273      * @return created authentication request context
 274      *
 275      * @throws ProfileException thrown if there is a problem creating the context
 276      */
 277     protected ShibbolethSSORequestContext buildRequestContext(ShibbolethSSOLoginContext loginContext,
 278             HTTPInTransport in, HTTPOutTransport out) throws ProfileException {
 279         ShibbolethSSORequestContext requestContext = new ShibbolethSSORequestContext();
 280
 281         try {
 282             requestContext.setMessageDecoder(getMessageDecoders().get(getInboundBinding()));
 283
 284             requestContext.setLoginContext(loginContext);
 285             requestContext.setPrincipalName(loginContext.getPrincipalName());
 286             requestContext.setPrincipalAuthenticationMethod(loginContext.getAuthenticationMethod());
 287             requestContext.setUserSession(getUserSession(in));
 288             requestContext.setRelayState(loginContext.getSpTarget());
 289
 290             requestContext.setInboundMessageTransport(in);
 291             requestContext.setInboundSAMLProtocol(ShibbolethConstants.SHIB_SSO_PROFILE_URI);
 292
 293             MetadataProvider metadataProvider = getMetadataProvider();
 294             requestContext.setMetadataProvider(metadataProvider);
 295
 296             String relyingPartyId = loginContext.getRelyingPartyId();
 297             requestContext.setInboundMessageIssuer(relyingPartyId);
 298             EntityDescriptor relyingPartyMetadata = metadataProvider.getEntityDescriptor(relyingPartyId);
 299             requestContext.setPeerEntityMetadata(relyingPartyMetadata);
 300             requestContext.setPeerEntityRole(SPSSODescriptor.DEFAULT_ELEMENT_NAME);
 301             requestContext.setPeerEntityRoleMetadata(relyingPartyMetadata.getSPSSODescriptor(SAMLConstants.SAML11P_NS));
 302             RelyingPartyConfiguration rpConfig = getRelyingPartyConfiguration(relyingPartyId);
 303             requestContext.setRelyingPartyConfiguration(rpConfig);
 304             requestContext.setPeerEntityEndpoint(selectEndpoint(requestContext));
 305
 306             String assertingPartyId = rpConfig.getProviderId();
 307             requestContext.setLocalEntityId(assertingPartyId);
 308             EntityDescriptor assertingPartyMetadata = metadataProvider.getEntityDescriptor(assertingPartyId);
 309             requestContext.setLocalEntityMetadata(assertingPartyMetadata);
 310             requestContext.setLocalEntityRole(IDPSSODescriptor.DEFAULT_ELEMENT_NAME);
 311             requestContext.setLocalEntityRoleMetadata(assertingPartyMetadata
 312                     .getIDPSSODescriptor(SAMLConstants.SAML20P_NS));
 313
 314             requestContext.setOutboundMessageTransport(out);
 315             requestContext.setOutboundSAMLProtocol(SAMLConstants.SAML20P_NS);
 316             ShibbolethSSOConfiguration profileConfig = (ShibbolethSSOConfiguration) rpConfig
 317                     .getProfileConfiguration(ShibbolethSSOConfiguration.PROFILE_ID);
 318             requestContext.setProfileConfiguration(profileConfig);
 319             requestContext.setOutboundMessageArtifactType(profileConfig.getOutboundArtifactType());
 320             if (profileConfig.getSigningCredential() != null) {
 321                 requestContext.setOutboundSAMLMessageSigningCredential(profileConfig.getSigningCredential());
 322             } else if (rpConfig.getDefaultSigningCredential() != null) {
 323                 requestContext.setOutboundSAMLMessageSigningCredential(rpConfig.getDefaultSigningCredential());
 324             }
 325
 326             return requestContext;
 327         } catch (MetadataProviderException e) {
 328             log.error("Unable to locate metadata for asserting or relying party");
 329             requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER, null, "Error locating party metadata"));
 330             throw new ProfileException("Error locating party metadata");
 331         }
 332     }
 333
 334     /**
 335      * Selects the appropriate endpoint for the relying party and stores it in the request context.
 336      *
 337      * @param requestContext current request context
 338      *
 339      * @return Endpoint selected from the information provided in the request context
 340      */
 341     protected Endpoint selectEndpoint(ShibbolethSSORequestContext requestContext) {
 342         ShibbolethSSOLoginContext loginContext = requestContext.getLoginContext();
 343
 344         ShibbolethSSOEndpointSelector endpointSelector = new ShibbolethSSOEndpointSelector();
 345         endpointSelector.setSpAssertionConsumerService(loginContext.getSpAssertionConsumerService());
 346         endpointSelector.setEndpointType(AssertionConsumerService.DEFAULT_ELEMENT_NAME);
 347         endpointSelector.setMetadataProvider(getMetadataProvider());
 348         endpointSelector.setEntityMetadata(requestContext.getPeerEntityMetadata());
 349         endpointSelector.setEntityRoleMetadata(requestContext.getPeerEntityRoleMetadata());
 350         endpointSelector.setSamlRequest(requestContext.getInboundSAMLMessage());
 351         endpointSelector.getSupportedIssuerBindings().addAll(getSupportedOutboundBindings());
 352
 353         return endpointSelector.selectEndpoint();
 354     }
 355
 356     /**
 357      * Builds the authentication statement for the authenticated principal.
 358      *
 359      * @param requestContext current request context
 360      *
 361      * @return the created statement
 362      *
 363      * @throws ProfileException thrown if the authentication statement can not be created
 364      */
 365     protected AuthenticationStatement buildAuthenticationStatement(ShibbolethSSORequestContext requestContext)
 366             throws ProfileException {
 367         ShibbolethSSOLoginContext loginContext = requestContext.getLoginContext();
 368
 369         AuthenticationStatement statement = authnStatementBuilder.buildObject();
 370         statement.setAuthenticationInstant(loginContext.getAuthenticationInstant());
 371         statement.setAuthenticationMethod(loginContext.getAuthenticationMethod());
 372
 373         statement.setSubjectLocality(buildSubjectLocality(requestContext));
 374
 375         Subject statementSubject = buildSubject(requestContext, "urn:oasis:names:tc:SAML:1.0:cm:bearer");
 376         statement.setSubject(statementSubject);
 377
 378         return statement;
 379     }
 380
 381     /**
 382      * Constructs the subject locality for the authentication statement.
 383      *
 384      * @param requestContext curent request context
 385      *
 386      * @return subject locality for the authentication statement
 387      */
 388     protected SubjectLocality buildSubjectLocality(ShibbolethSSORequestContext requestContext) {
 389         SubjectLocality subjectLocality = subjectLocalityBuilder.buildObject();
 390
 391         HTTPInTransport inTransport = (HTTPInTransport) requestContext.getInboundMessageTransport();
 392         subjectLocality.setIPAddress(inTransport.getPeerAddress());
 393         subjectLocality.setDNSAddress(inTransport.getPeerDomainName());
 394
 395         return subjectLocality;
 396     }
 397
 398     /** Represents the internal state of a Shibboleth SSO Request while it's being processed by the IdP. */
 399     public class ShibbolethSSORequestContext extends
 400             BaseSAML1ProfileRequestContext<Request, Response, ShibbolethSSOConfiguration> {
 401
 402         /** SP-provide assertion consumer service URL. */
 403         private String spAssertionConsumerService;
 404
 405         /** Current login context. */
 406         private ShibbolethSSOLoginContext loginContext;
 407
 408         /**
 409          * Gets the current login context.
 410          *
 411          * @return current login context
 412          */
 413         public ShibbolethSSOLoginContext getLoginContext() {
 414             return loginContext;
 415         }
 416
 417         /**
 418          * Sets the current login context.
 419          *
 420          * @param context current login context
 421          */
 422         public void setLoginContext(ShibbolethSSOLoginContext context) {
 423             loginContext = context;
 424         }
 425
 426         /**
 427          * Gets the SP-provided assertion consumer service URL.
 428          *
 429          * @return SP-provided assertion consumer service URL
 430          */
 431         public String getSpAssertionConsumerService() {
 432             return spAssertionConsumerService;
 433         }
 434
 435         /**
 436          * Sets the SP-provided assertion consumer service URL.
 437          *
 438          * @param acs SP-provided assertion consumer service URL
 439          */
 440         public void setSpAssertionConsumerService(String acs) {
 441             spAssertionConsumerService = acs;
 442         }
 443     }
 444 }