src/main/java/edu/internet2/middleware/shibboleth/idp/profile/saml2/ArtifactResolution.java

   1 /*
   2  * Copyright 2006 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 org.joda.time.DateTime;
  20 import org.opensaml.common.SAMLObject;
  21 import org.opensaml.common.SAMLObjectBuilder;
  22 import org.opensaml.common.binding.BasicEndpointSelector;
  23 import org.opensaml.common.binding.artifact.SAMLArtifactMap;
  24 import org.opensaml.common.binding.artifact.SAMLArtifactMap.SAMLArtifactMapEntry;
  25 import org.opensaml.common.binding.decoding.SAMLMessageDecoder;
  26 import org.opensaml.common.xml.SAMLConstants;
  27 import org.opensaml.saml2.binding.SAML2ArtifactMessageContext;
  28 import org.opensaml.saml2.core.ArtifactResolve;
  29 import org.opensaml.saml2.core.ArtifactResponse;
  30 import org.opensaml.saml2.core.NameID;
  31 import org.opensaml.saml2.core.Status;
  32 import org.opensaml.saml2.core.StatusCode;
  33 import org.opensaml.saml2.metadata.AssertionConsumerService;
  34 import org.opensaml.saml2.metadata.AttributeAuthorityDescriptor;
  35 import org.opensaml.saml2.metadata.Endpoint;
  36 import org.opensaml.saml2.metadata.EntityDescriptor;
  37 import org.opensaml.saml2.metadata.SPSSODescriptor;
  38 import org.opensaml.saml2.metadata.provider.MetadataProvider;
  39 import org.opensaml.ws.message.decoder.MessageDecodingException;
  40 import org.opensaml.ws.transport.http.HTTPInTransport;
  41 import org.opensaml.ws.transport.http.HTTPOutTransport;
  42 import org.opensaml.xml.security.SecurityException;
  43 import org.slf4j.Logger;
  44 import org.slf4j.LoggerFactory;
  45
  46 import edu.internet2.middleware.shibboleth.common.profile.ProfileException;
  47 import edu.internet2.middleware.shibboleth.common.profile.provider.BaseSAMLProfileRequestContext;
  48 import edu.internet2.middleware.shibboleth.common.relyingparty.provider.saml2.ArtifactResolutionConfiguration;
  49
  50 /**
  51  * SAML 2.0 Artifact resolution profile handler.
  52  */
  53 public class ArtifactResolution extends AbstractSAML2ProfileHandler {
  54
  55     /** Class logger. */
  56     private final Logger log = LoggerFactory.getLogger(ArtifactResolution.class);
  57
  58     /** Map artifacts to SAML messages. */
  59     private SAMLArtifactMap artifactMap;
  60
  61     /** Artifact response object builder. */
  62     private SAMLObjectBuilder<ArtifactResponse> responseBuilder;
  63
  64     /** Builder of assertion consumer service endpoints. */
  65     private SAMLObjectBuilder<AssertionConsumerService> acsEndpointBuilder;
  66
  67     /**
  68      * Constructor.
  69      *
  70      * @param map ArtifactMap used to lookup artifacts to be resolved.
  71      */
  72     public ArtifactResolution(SAMLArtifactMap map) {
  73         super();
  74
  75         artifactMap = map;
  76
  77         responseBuilder = (SAMLObjectBuilder<ArtifactResponse>) getBuilderFactory().getBuilder(
  78                 ArtifactResponse.DEFAULT_ELEMENT_NAME);
  79         acsEndpointBuilder = (SAMLObjectBuilder<AssertionConsumerService>) getBuilderFactory().getBuilder(
  80                 AssertionConsumerService.DEFAULT_ELEMENT_NAME);
  81     }
  82
  83     /** {@inheritDoc} */
  84     public String getProfileId() {
  85         return ArtifactResolutionConfiguration.PROFILE_ID;
  86     }
  87
  88     /** {@inheritDoc} */
  89     public void processRequest(HTTPInTransport inTransport, HTTPOutTransport outTransport) throws ProfileException {
  90         ArtifactResponse samlResponse;
  91
  92         ArtifactResolutionRequestContext requestContext = new ArtifactResolutionRequestContext();
  93         try {
  94             decodeRequest(requestContext, inTransport, outTransport);
  95
  96             if (requestContext.getProfileConfiguration() == null) {
  97                 log.error("SAML 2 Artifact Resolve profile is not configured for relying party "
  98                         + requestContext.getInboundMessageIssuer());
  99                 requestContext.setFailureStatus(buildStatus(StatusCode.SUCCESS_URI, StatusCode.REQUEST_DENIED_URI,
 100                         "SAML 2 Artifact Resolve profile is not configured for relying party "
 101                                 + requestContext.getInboundMessageIssuer()));
 102                 throw new ProfileException("SAML 2 Artifact Resolve profile is not configured for relying party "
 103                         + requestContext.getInboundMessageIssuer());
 104             }
 105
 106             checkSamlVersion(requestContext);
 107
 108             SAMLArtifactMapEntry artifactEntry = artifactMap.get(requestContext.getArtifact());
 109             if (artifactEntry == null || artifactEntry.isExpired()) {
 110                 log.error("Unknown artifact.");
 111                 requestContext.setFailureStatus(buildStatus(StatusCode.SUCCESS_URI, StatusCode.REQUEST_DENIED_URI,
 112                         "Unknown artifact."));
 113             }
 114
 115             if (!artifactEntry.getIssuerId().equals(requestContext.getLocalEntityId())) {
 116                 log.error("Artifact issuer mismatch.  Artifact issued by " + artifactEntry.getIssuerId()
 117                         + " but IdP has entity ID of " + requestContext.getLocalEntityId());
 118                 requestContext.setFailureStatus(buildStatus(StatusCode.SUCCESS_URI, StatusCode.REQUEST_DENIED_URI,
 119                         "Artifact issuer mismatch."));
 120             }
 121
 122             if (!artifactEntry.getRelyingPartyId().equals(requestContext.getInboundMessageIssuer())) {
 123                 log.error("Artifact requester mismatch.  Artifact was issued to " + artifactEntry.getRelyingPartyId()
 124                         + " but was resolve request came from " + requestContext.getInboundMessageIssuer());
 125                 requestContext.setFailureStatus(buildStatus(StatusCode.SUCCESS_URI, StatusCode.REQUEST_DENIED_URI,
 126                         "Artifact requester mismatch."));
 127             }
 128
 129             // create the SAML response
 130             requestContext.setReferencedMessage(artifactEntry.getSamlMessage());
 131             samlResponse = buildArtifactResponse(requestContext);
 132         } catch (ProfileException e) {
 133             samlResponse = buildArtifactErrorResponse(requestContext);
 134         }
 135
 136         requestContext.setOutboundSAMLMessage(samlResponse);
 137         requestContext.setOutboundSAMLMessageId(samlResponse.getID());
 138         requestContext.setOutboundSAMLMessageIssueInstant(samlResponse.getIssueInstant());
 139
 140         encodeResponse(requestContext);
 141         writeAuditLogEntry(requestContext);
 142     }
 143
 144     /**
 145      * Decodes an incoming request and populates a created request context with the resultant information.
 146      *
 147      * @param inTransport inbound message transport
 148      * @param outTransport outbound message transport
 149      * @param requestContext request context to which decoded information should be added
 150      *
 151      * @throws ProfileException throw if there is a problem decoding the request
 152      */
 153     protected void decodeRequest(ArtifactResolutionRequestContext requestContext, HTTPInTransport inTransport,
 154             HTTPOutTransport outTransport) throws ProfileException {
 155         log.debug("Decoding message with decoder binding {}", getInboundBinding());
 156
 157         requestContext.setCommunicationProfileId(getProfileId());
 158
 159         MetadataProvider metadataProvider = getMetadataProvider();
 160         requestContext.setMetadataProvider(metadataProvider);
 161
 162         requestContext.setInboundMessageTransport(inTransport);
 163         requestContext.setInboundSAMLProtocol(SAMLConstants.SAML20P_NS);
 164         requestContext.setSecurityPolicyResolver(getSecurityPolicyResolver());
 165         requestContext.setPeerEntityRole(SPSSODescriptor.DEFAULT_ELEMENT_NAME);
 166
 167         requestContext.setOutboundMessageTransport(outTransport);
 168         requestContext.setOutboundSAMLProtocol(SAMLConstants.SAML20P_NS);
 169
 170         try {
 171             SAMLMessageDecoder decoder = getMessageDecoders().get(getInboundBinding());
 172             requestContext.setMessageDecoder(decoder);
 173             decoder.decode(requestContext);
 174             log.debug("Decoded request");
 175         } catch (MessageDecodingException e) {
 176             log.error("Error decoding artifact resolve message", e);
 177             requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER_URI, null, "Error decoding message"));
 178             throw new ProfileException("Error decoding artifact resolve message");
 179         } catch (SecurityException e) {
 180             log.error("Message did not meet security requirements", e);
 181             requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER_URI, StatusCode.REQUEST_DENIED_URI,
 182                     "Message did not meet security requirements"));
 183             throw new ProfileException("Message did not meet security requirements", e);
 184         } finally {
 185             populateRequestContext(requestContext);
 186         }
 187     }
 188
 189     /** {@inheritDoc} */
 190     protected void populateRelyingPartyInformation(BaseSAMLProfileRequestContext requestContext)
 191             throws ProfileException {
 192         super.populateRelyingPartyInformation(requestContext);
 193
 194         EntityDescriptor relyingPartyMetadata = requestContext.getPeerEntityMetadata();
 195         if (relyingPartyMetadata != null) {
 196             requestContext.setPeerEntityRole(SPSSODescriptor.DEFAULT_ELEMENT_NAME);
 197             requestContext.setPeerEntityRoleMetadata(relyingPartyMetadata.getSPSSODescriptor(SAMLConstants.SAML20P_NS));
 198         }
 199     }
 200
 201     /** {@inheritDoc} */
 202     protected void populateAssertingPartyInformation(BaseSAMLProfileRequestContext requestContext)
 203             throws ProfileException {
 204         super.populateAssertingPartyInformation(requestContext);
 205
 206         EntityDescriptor localEntityDescriptor = requestContext.getLocalEntityMetadata();
 207         if (localEntityDescriptor != null) {
 208             requestContext.setLocalEntityRole(AttributeAuthorityDescriptor.DEFAULT_ELEMENT_NAME);
 209             requestContext.setLocalEntityRoleMetadata(localEntityDescriptor
 210                     .getAttributeAuthorityDescriptor(SAMLConstants.SAML20P_NS));
 211         }
 212     }
 213
 214     /**
 215      * Populates the request context with information from the inbound SAML message.
 216      *
 217      * This method requires the the following request context properties to be populated: inbound saml message
 218      *
 219      * This methods populates the following request context properties: subject name identifier
 220      *
 221      * @param requestContext current request context
 222      *
 223      * @throws ProfileException thrown if the inbound SAML message or subject identifier is null
 224      */
 225     protected void populateSAMLMessageInformation(BaseSAMLProfileRequestContext requestContext) throws ProfileException {
 226         ArtifactResolve samlMessage = (ArtifactResolve) requestContext.getInboundSAMLMessage();
 227         if(samlMessage != null && samlMessage.getArtifact() != null){
 228             ((ArtifactResolutionRequestContext) requestContext).setArtifact(samlMessage.getArtifact().getArtifact());
 229         }
 230     }
 231
 232     /**
 233      * Selects the appropriate endpoint for the relying party and stores it in the request context.
 234      *
 235      * @param requestContext current request context
 236      *
 237      * @return Endpoint selected from the information provided in the request context
 238      */
 239     protected Endpoint selectEndpoint(BaseSAMLProfileRequestContext requestContext) {
 240         Endpoint endpoint;
 241
 242         if (getInboundBinding().equals(SAMLConstants.SAML2_SOAP11_BINDING_URI)) {
 243             endpoint = acsEndpointBuilder.buildObject();
 244             endpoint.setBinding(SAMLConstants.SAML2_SOAP11_BINDING_URI);
 245         } else {
 246             BasicEndpointSelector endpointSelector = new BasicEndpointSelector();
 247             endpointSelector.setEndpointType(AssertionConsumerService.DEFAULT_ELEMENT_NAME);
 248             endpointSelector.setMetadataProvider(getMetadataProvider());
 249             endpointSelector.setEntityMetadata(requestContext.getPeerEntityMetadata());
 250             endpointSelector.setEntityRoleMetadata(requestContext.getPeerEntityRoleMetadata());
 251             endpointSelector.setSamlRequest(requestContext.getInboundSAMLMessage());
 252             endpointSelector.getSupportedIssuerBindings().addAll(getSupportedOutboundBindings());
 253             endpoint = endpointSelector.selectEndpoint();
 254         }
 255
 256         return endpoint;
 257     }
 258
 259     /**
 260      * Constructs a artifact resolution response with the derferenced SAML message inside.
 261      *
 262      * @param requestContext current request context
 263      *
 264      * @return constructed response
 265      */
 266     protected ArtifactResponse buildArtifactResponse(ArtifactResolutionRequestContext requestContext) {
 267         DateTime issueInstant = new DateTime();
 268
 269         // create the SAML response and add the assertion
 270         ArtifactResponse samlResponse = responseBuilder.buildObject();
 271         samlResponse.setIssueInstant(issueInstant);
 272         populateStatusResponse(requestContext, samlResponse);
 273
 274         if (requestContext.getFailureStatus() == null) {
 275             Status status = buildStatus(StatusCode.SUCCESS_URI, null, null);
 276             samlResponse.setStatus(status);
 277             samlResponse.setMessage(requestContext.getReferencedMessage());
 278         } else {
 279             samlResponse.setStatus(requestContext.getFailureStatus());
 280         }
 281
 282         return samlResponse;
 283     }
 284
 285     /**
 286      * Constructs an artifact resolution response with an error status as content.
 287      *
 288      * @param requestContext current request context
 289      *
 290      * @return constructed response
 291      */
 292     protected ArtifactResponse buildArtifactErrorResponse(ArtifactResolutionRequestContext requestContext) {
 293         ArtifactResponse samlResponse = responseBuilder.buildObject();
 294         samlResponse.setIssueInstant(new DateTime());
 295         populateStatusResponse(requestContext, samlResponse);
 296
 297         samlResponse.setStatus(requestContext.getFailureStatus());
 298
 299         return samlResponse;
 300     }
 301
 302     /** Represents the internal state of a SAML 2.0 Artiface resolver request while it's being processed by the IdP. */
 303     public class ArtifactResolutionRequestContext extends
 304             BaseSAML2ProfileRequestContext<ArtifactResolve, ArtifactResponse, ArtifactResolutionConfiguration>
 305             implements SAML2ArtifactMessageContext<ArtifactResolve, ArtifactResponse, NameID> {
 306
 307         /** Artifact to be resolved. */
 308         private String artifact;
 309
 310         /** Message referenced by the SAML artifact. */
 311         private SAMLObject referencedMessage;
 312
 313         /** {@inheritDoc} */
 314         public String getArtifact() {
 315             return artifact;
 316         }
 317
 318         /** {@inheritDoc} */
 319         public void setArtifact(String saml2Artifact) {
 320             this.artifact = saml2Artifact;
 321         }
 322
 323         /** {@inheritDoc} */
 324         public SAMLObject getReferencedMessage() {
 325             return referencedMessage;
 326         }
 327
 328         /** {@inheritDoc} */
 329         public void setReferencedMessage(SAMLObject message) {
 330             referencedMessage = message;
 331         }
 332     }
 333 }