Generate endpoint if there is no metadata for the relying party
[java-idp.git] / 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
27 import org.opensaml.common.SAMLObjectBuilder;
28 import org.opensaml.common.binding.decoding.SAMLMessageDecoder;
29 import org.opensaml.common.xml.SAMLConstants;
30 import org.opensaml.saml1.core.AttributeStatement;
31 import org.opensaml.saml1.core.AuthenticationStatement;
32 import org.opensaml.saml1.core.Request;
33 import org.opensaml.saml1.core.Response;
34 import org.opensaml.saml1.core.Statement;
35 import org.opensaml.saml1.core.StatusCode;
36 import org.opensaml.saml1.core.Subject;
37 import org.opensaml.saml1.core.SubjectLocality;
38 import org.opensaml.saml2.metadata.AssertionConsumerService;
39 import org.opensaml.saml2.metadata.Endpoint;
40 import org.opensaml.saml2.metadata.EntityDescriptor;
41 import org.opensaml.saml2.metadata.IDPSSODescriptor;
42 import org.opensaml.saml2.metadata.SPSSODescriptor;
43 import org.opensaml.ws.message.decoder.MessageDecodingException;
44 import org.opensaml.ws.transport.http.HTTPInTransport;
45 import org.opensaml.ws.transport.http.HTTPOutTransport;
46 import org.opensaml.ws.transport.http.HttpServletRequestAdapter;
47 import org.opensaml.ws.transport.http.HttpServletResponseAdapter;
48 import org.opensaml.xml.security.SecurityException;
49 import org.opensaml.xml.util.DatatypeHelper;
50 import org.slf4j.Logger;
51 import org.slf4j.LoggerFactory;
52
53 import edu.internet2.middleware.shibboleth.common.ShibbolethConstants;
54 import edu.internet2.middleware.shibboleth.common.profile.ProfileException;
55 import edu.internet2.middleware.shibboleth.common.profile.provider.BaseSAMLProfileRequestContext;
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 = LoggerFactory.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     /** Builder of Endpoint objects. */
76     private SAMLObjectBuilder<Endpoint> endpointBuilder;
77
78     /** URL of the authentication manager servlet. */
79     private String authenticationManagerPath;
80
81     /**
82      * Constructor.
83      * 
84      * @param authnManagerPath path to the authentication manager servlet
85      * 
86      * @throws IllegalArgumentException thrown if either the authentication manager path or encoding binding URI are
87      *             null or empty
88      */
89     public ShibbolethSSOProfileHandler(String authnManagerPath) {
90         if (DatatypeHelper.isEmpty(authnManagerPath)) {
91             throw new IllegalArgumentException("Authentication manager path may not be null");
92         }
93         authenticationManagerPath = authnManagerPath;
94
95         authnStatementBuilder = (SAMLObjectBuilder<AuthenticationStatement>) getBuilderFactory().getBuilder(
96                 AuthenticationStatement.DEFAULT_ELEMENT_NAME);
97
98         subjectLocalityBuilder = (SAMLObjectBuilder<SubjectLocality>) getBuilderFactory().getBuilder(
99                 SubjectLocality.DEFAULT_ELEMENT_NAME);
100
101         endpointBuilder = (SAMLObjectBuilder<Endpoint>) getBuilderFactory().getBuilder(Endpoint.DEFAULT_ELEMENT_NAME);
102     }
103
104     /** {@inheritDoc} */
105     public String getProfileId() {
106         return ShibbolethSSOConfiguration.PROFILE_ID;
107     }
108
109     /** {@inheritDoc} */
110     public void processRequest(HTTPInTransport inTransport, HTTPOutTransport outTransport) throws ProfileException {
111         log.debug("Processing incoming request");
112
113         HttpServletRequest httpRequest = ((HttpServletRequestAdapter) inTransport).getWrappedRequest();
114         LoginContext loginContext = (LoginContext) httpRequest.getAttribute(LoginContext.LOGIN_CONTEXT_KEY);
115
116         if (loginContext == null) {
117             log.debug("Incoming request does not contain a login context, processing as first leg of request");
118             performAuthentication(inTransport, outTransport);
119         } else {
120             log.debug("Incoming request 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         ShibbolethSSOLoginContext loginContext = (ShibbolethSSOLoginContext) httpRequest
233                 .getAttribute(LoginContext.LOGIN_CONTEXT_KEY);
234
235         ShibbolethSSORequestContext requestContext = buildRequestContext(loginContext, inTransport, outTransport);
236
237         Response samlResponse;
238         try {
239             if (loginContext.getAuthenticationFailure() != null) {
240                 log.error("User authentication failed with the following error: {}", loginContext
241                         .getAuthenticationFailure().toString());
242                 requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER, null, "User failed authentication"));
243                 throw new ProfileException("Authentication failure", loginContext.getAuthenticationFailure());
244             }
245
246             resolveAttributes(requestContext);
247
248             ArrayList<Statement> statements = new ArrayList<Statement>();
249             statements.add(buildAuthenticationStatement(requestContext));
250             if (requestContext.getProfileConfiguration().includeAttributeStatement()) {
251                 AttributeStatement attributeStatement = buildAttributeStatement(requestContext,
252                         "urn:oasis:names:tc:SAML:1.0:cm:bearer");
253                 if (attributeStatement != null) {
254                     requestContext.setRequestedAttributes(requestContext.getAttributes().keySet());
255                     statements.add(attributeStatement);
256                 }
257             }
258
259             samlResponse = buildResponse(requestContext, statements);
260         } catch (ProfileException e) {
261             samlResponse = buildErrorResponse(requestContext);
262         }
263
264         requestContext.setOutboundSAMLMessage(samlResponse);
265         requestContext.setOutboundSAMLMessageId(samlResponse.getID());
266         requestContext.setOutboundSAMLMessageIssueInstant(samlResponse.getIssueInstant());
267         encodeResponse(requestContext);
268         writeAuditLogEntry(requestContext);
269     }
270
271     /**
272      * Creates an authentication request context from the current environmental information.
273      * 
274      * @param loginContext current login context
275      * @param in inbound transport
276      * @param out outbount transport
277      * 
278      * @return created authentication request context
279      * 
280      * @throws ProfileException thrown if there is a problem creating the context
281      */
282     protected ShibbolethSSORequestContext buildRequestContext(ShibbolethSSOLoginContext loginContext,
283             HTTPInTransport in, HTTPOutTransport out) throws ProfileException {
284         ShibbolethSSORequestContext requestContext = new ShibbolethSSORequestContext();
285
286         requestContext.setMessageDecoder(getMessageDecoders().get(getInboundBinding()));
287
288         requestContext.setLoginContext(loginContext);
289         requestContext.setRelayState(loginContext.getSpTarget());
290
291         requestContext.setInboundMessageTransport(in);
292         requestContext.setInboundSAMLProtocol(ShibbolethConstants.SHIB_SSO_PROFILE_URI);
293
294         requestContext.setOutboundMessageTransport(out);
295         requestContext.setOutboundSAMLProtocol(SAMLConstants.SAML20P_NS);
296
297         requestContext.setMetadataProvider(getMetadataProvider());
298
299         String relyingPartyId = loginContext.getRelyingPartyId();
300         requestContext.setPeerEntityId(relyingPartyId);
301         requestContext.setInboundMessageIssuer(relyingPartyId);
302
303         populateRequestContext(requestContext);
304
305         return requestContext;
306     }
307
308     /** {@inheritDoc} */
309     protected void populateRelyingPartyInformation(BaseSAMLProfileRequestContext requestContext)
310             throws ProfileException {
311         super.populateRelyingPartyInformation(requestContext);
312
313         EntityDescriptor relyingPartyMetadata = requestContext.getPeerEntityMetadata();
314         if (relyingPartyMetadata != null) {
315             requestContext.setPeerEntityRole(SPSSODescriptor.DEFAULT_ELEMENT_NAME);
316             requestContext.setPeerEntityRoleMetadata(relyingPartyMetadata.getSPSSODescriptor(SAMLConstants.SAML11P_NS));
317         }
318     }
319
320     /** {@inheritDoc} */
321     protected void populateAssertingPartyInformation(BaseSAMLProfileRequestContext requestContext)
322             throws ProfileException {
323         super.populateAssertingPartyInformation(requestContext);
324
325         EntityDescriptor localEntityDescriptor = requestContext.getLocalEntityMetadata();
326         if (localEntityDescriptor != null) {
327             requestContext.setLocalEntityRole(IDPSSODescriptor.DEFAULT_ELEMENT_NAME);
328             requestContext.setLocalEntityRoleMetadata(localEntityDescriptor
329                     .getIDPSSODescriptor(SAMLConstants.SAML20P_NS));
330         }
331     }
332
333     /** {@inheritDoc} */
334     protected void populateSAMLMessageInformation(BaseSAMLProfileRequestContext requestContext) throws ProfileException {
335         // nothing to do here
336     }
337
338     /**
339      * Selects the appropriate endpoint for the relying party and stores it in the request context.
340      * 
341      * @param requestContext current request context
342      * 
343      * @return Endpoint selected from the information provided in the request context
344      */
345     protected Endpoint selectEndpoint(BaseSAMLProfileRequestContext requestContext) {
346         ShibbolethSSOLoginContext loginContext = ((ShibbolethSSORequestContext) requestContext).getLoginContext();
347
348         ShibbolethSSOEndpointSelector endpointSelector = new ShibbolethSSOEndpointSelector();
349         endpointSelector.setSpAssertionConsumerService(loginContext.getSpAssertionConsumerService());
350         endpointSelector.setEndpointType(AssertionConsumerService.DEFAULT_ELEMENT_NAME);
351         endpointSelector.setMetadataProvider(getMetadataProvider());
352         endpointSelector.setEntityMetadata(requestContext.getPeerEntityMetadata());
353         endpointSelector.setEntityRoleMetadata(requestContext.getPeerEntityRoleMetadata());
354         endpointSelector.setSamlRequest(requestContext.getInboundSAMLMessage());
355         endpointSelector.getSupportedIssuerBindings().addAll(getSupportedOutboundBindings());
356
357         Endpoint endpoint = endpointSelector.selectEndpoint();
358         if (endpoint == null && loginContext.getSpAssertionConsumerService() != null) {
359             endpoint = endpointBuilder.buildObject();
360             endpoint.setLocation(loginContext.getSpAssertionConsumerService());
361             endpoint.setBinding(getInboundBinding());
362             log.warn("No endpoint available for relying party {}. Generating endpoint with ACS url {} and binding {}",
363                     new Object[] { requestContext.getPeerEntityId(), endpoint.getLocation(), endpoint.getBinding() });
364         }
365
366         return endpoint;
367     }
368
369     /**
370      * Builds the authentication statement for the authenticated principal.
371      * 
372      * @param requestContext current request context
373      * 
374      * @return the created statement
375      * 
376      * @throws ProfileException thrown if the authentication statement can not be created
377      */
378     protected AuthenticationStatement buildAuthenticationStatement(ShibbolethSSORequestContext requestContext)
379             throws ProfileException {
380         ShibbolethSSOLoginContext loginContext = requestContext.getLoginContext();
381
382         AuthenticationStatement statement = authnStatementBuilder.buildObject();
383         statement.setAuthenticationInstant(loginContext.getAuthenticationInstant());
384         statement.setAuthenticationMethod(loginContext.getAuthenticationMethod());
385
386         statement.setSubjectLocality(buildSubjectLocality(requestContext));
387
388         Subject statementSubject = buildSubject(requestContext, "urn:oasis:names:tc:SAML:1.0:cm:bearer");
389         statement.setSubject(statementSubject);
390
391         return statement;
392     }
393
394     /**
395      * Constructs the subject locality for the authentication statement.
396      * 
397      * @param requestContext curent request context
398      * 
399      * @return subject locality for the authentication statement
400      */
401     protected SubjectLocality buildSubjectLocality(ShibbolethSSORequestContext requestContext) {
402         SubjectLocality subjectLocality = subjectLocalityBuilder.buildObject();
403
404         HTTPInTransport inTransport = (HTTPInTransport) requestContext.getInboundMessageTransport();
405         subjectLocality.setIPAddress(inTransport.getPeerAddress());
406
407         return subjectLocality;
408     }
409
410     /** Represents the internal state of a Shibboleth SSO Request while it's being processed by the IdP. */
411     public class ShibbolethSSORequestContext extends
412             BaseSAML1ProfileRequestContext<Request, Response, ShibbolethSSOConfiguration> {
413
414         /** SP-provide assertion consumer service URL. */
415         private String spAssertionConsumerService;
416
417         /** Current login context. */
418         private ShibbolethSSOLoginContext loginContext;
419
420         /**
421          * Gets the current login context.
422          * 
423          * @return current login context
424          */
425         public ShibbolethSSOLoginContext getLoginContext() {
426             return loginContext;
427         }
428
429         /**
430          * Sets the current login context.
431          * 
432          * @param context current login context
433          */
434         public void setLoginContext(ShibbolethSSOLoginContext context) {
435             loginContext = context;
436         }
437
438         /**
439          * Gets the SP-provided assertion consumer service URL.
440          * 
441          * @return SP-provided assertion consumer service URL
442          */
443         public String getSpAssertionConsumerService() {
444             return spAssertionConsumerService;
445         }
446
447         /**
448          * Sets the SP-provided assertion consumer service URL.
449          * 
450          * @param acs SP-provided assertion consumer service URL
451          */
452         public void setSpAssertionConsumerService(String acs) {
453             spAssertionConsumerService = acs;
454         }
455     }
456 }