src/edu/internet2/middleware/shibboleth/idp/profile/saml1/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.saml1;
  18
  19 import java.util.ArrayList;
  20 import java.util.Collection;
  21
  22 import org.apache.log4j.Logger;
  23 import org.joda.time.DateTime;
  24 import org.opensaml.common.SAMLObjectBuilder;
  25 import org.opensaml.common.binding.BasicEndpointSelector;
  26 import org.opensaml.common.binding.artifact.SAMLArtifactMap;
  27 import org.opensaml.common.binding.artifact.SAMLArtifactMap.SAMLArtifactMapEntry;
  28 import org.opensaml.common.binding.decoding.SAMLMessageDecoder;
  29 import org.opensaml.common.xml.SAMLConstants;
  30 import org.opensaml.saml1.binding.SAML1ArtifactMessageContext;
  31 import org.opensaml.saml1.binding.artifact.AbstractSAML1Artifact;
  32 import org.opensaml.saml1.core.Assertion;
  33 import org.opensaml.saml1.core.NameIdentifier;
  34 import org.opensaml.saml1.core.Request;
  35 import org.opensaml.saml1.core.Response;
  36 import org.opensaml.saml1.core.Status;
  37 import org.opensaml.saml1.core.StatusCode;
  38 import org.opensaml.saml2.metadata.AssertionConsumerService;
  39 import org.opensaml.saml2.metadata.AttributeAuthorityDescriptor;
  40 import org.opensaml.saml2.metadata.Endpoint;
  41 import org.opensaml.saml2.metadata.SPSSODescriptor;
  42 import org.opensaml.saml2.metadata.provider.MetadataProvider;
  43 import org.opensaml.saml2.metadata.provider.MetadataProviderException;
  44 import org.opensaml.ws.message.decoder.MessageDecodingException;
  45 import org.opensaml.ws.security.SecurityPolicyException;
  46 import org.opensaml.ws.transport.http.HTTPInTransport;
  47 import org.opensaml.ws.transport.http.HTTPOutTransport;
  48
  49 import edu.internet2.middleware.shibboleth.common.profile.ProfileException;
  50 import edu.internet2.middleware.shibboleth.common.relyingparty.RelyingPartyConfiguration;
  51 import edu.internet2.middleware.shibboleth.common.relyingparty.provider.saml1.ArtifactResolutionConfiguration;
  52
  53 /**
  54  * SAML 1 Artifact resolution profile handler.
  55  */
  56 public class ArtifactResolution extends AbstractSAML1ProfileHandler {
  57
  58     /** Class logger. */
  59     private final Logger log = Logger.getLogger(ArtifactResolution.class);
  60
  61     /** Builder of Response objects. */
  62     private SAMLObjectBuilder<Response> responseBuilder;
  63
  64     /** Map artifacts to SAML messages. */
  65     private SAMLArtifactMap artifactMap;
  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<Response>) getBuilderFactory().getBuilder(Response.DEFAULT_ELEMENT_NAME);
  78     }
  79
  80     /** {@inheritDoc} */
  81     public String getProfileId() {
  82         return "urn:mace:shibboleth:2.0:idp:profiles:saml1:request:artifact";
  83     }
  84
  85     /** {@inheritDoc} */
  86     public void processRequest(HTTPInTransport inTransport, HTTPOutTransport outTransport) throws ProfileException {
  87         Response samlResponse;
  88
  89         ArtifactResolutionRequestContext requestContext = decodeRequest(inTransport, outTransport);
  90
  91         try {
  92             if (requestContext.getRelyingPartyConfiguration() == null) {
  93                 log.error("SAML 1 Artifact resolution profile is not configured for relying party "
  94                         + requestContext.getInboundMessageIssuer());
  95                 requestContext.setFailureStatus(buildStatus(StatusCode.SUCCESS, StatusCode.REQUEST_DENIED,
  96                         "SAML 1 Artifact resolution profile is not configured for relying party "
  97                                 + requestContext.getInboundMessageIssuer()));
  98                 throw new ProfileException("SAML 1 Artifact resolution profile is not configured for relying party "
  99                         + requestContext.getInboundMessageIssuer());
 100             }
 101
 102             checkSamlVersion(requestContext);
 103
 104             // create the SAML response
 105             samlResponse = buildArtifactResponse(requestContext);
 106         } catch (ProfileException e) {
 107             samlResponse = buildErrorResponse(requestContext);
 108         }
 109
 110         requestContext.setOutboundSAMLMessage(samlResponse);
 111         requestContext.setOutboundSAMLMessageId(samlResponse.getID());
 112         requestContext.setOutboundSAMLMessageIssueInstant(samlResponse.getIssueInstant());
 113
 114         encodeResponse(requestContext);
 115         writeAuditLogEntry(requestContext);
 116     }
 117
 118     /**
 119      * Decodes an incoming request and populates a created request context with the resultant information.
 120      *
 121      * @param inTransport inbound message transport
 122      * @param outTransport outbound message transport
 123      *
 124      * @return the created request context
 125      *
 126      * @throws ProfileException throw if there is a problem decoding the request
 127      */
 128     protected ArtifactResolutionRequestContext decodeRequest(HTTPInTransport inTransport, HTTPOutTransport outTransport)
 129             throws ProfileException {
 130         if (log.isDebugEnabled()) {
 131             log.debug("Decoding incomming request");
 132         }
 133
 134         MetadataProvider metadataProvider = getMetadataProvider();
 135
 136         ArtifactResolutionRequestContext requestContext = new ArtifactResolutionRequestContext();
 137         requestContext.setMetadataProvider(metadataProvider);
 138
 139         requestContext.setInboundMessageTransport(inTransport);
 140         requestContext.setInboundSAMLProtocol(SAMLConstants.SAML11P_NS);
 141         requestContext.setPeerEntityRole(SPSSODescriptor.DEFAULT_ELEMENT_NAME);
 142
 143         requestContext.setOutboundMessageTransport(outTransport);
 144         requestContext.setOutboundSAMLProtocol(SAMLConstants.SAML11P_NS);
 145
 146         try {
 147             SAMLMessageDecoder decoder = getMessageDecoders().get(getInboundBinding());
 148             requestContext.setMessageDecoder(decoder);
 149             decoder.decode(requestContext);
 150             if (log.isDebugEnabled()) {
 151                 log.debug("Decoded request");
 152             }
 153             return requestContext;
 154         } catch (MessageDecodingException e) {
 155             log.error("Error decoding artifact resolve message", e);
 156             requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER, null, "Error decoding message"));
 157             throw new ProfileException("Error decoding artifact resolve message");
 158         } catch (SecurityPolicyException e) {
 159             log.error("Message did not meet security policy requirements", e);
 160             requestContext.setFailureStatus(buildStatus(StatusCode.RESPONDER, StatusCode.REQUEST_DENIED,
 161                     "Message did not meet security policy requirements"));
 162             throw new ProfileException("Message did not meet security policy requirements", e);
 163         } finally {
 164             // Set as much information as can be retrieved from the decoded message
 165             try {
 166                 AbstractSAML1Artifact artifact = requestContext.getArtifacts().iterator().next();
 167                 SAMLArtifactMapEntry artifactEntry = artifactMap.get(artifact.getArtifactBytes());
 168                 String relyingPartyId = artifactEntry.getRelyingPartyId();
 169
 170                 requestContext.setInboundMessageIssuer(relyingPartyId);
 171                 RelyingPartyConfiguration rpConfig = getRelyingPartyConfiguration(relyingPartyId);
 172                 requestContext.setRelyingPartyConfiguration(rpConfig);
 173
 174                 String assertingPartyId = requestContext.getRelyingPartyConfiguration().getProviderId();
 175                 requestContext.setLocalEntityId(assertingPartyId);
 176                 requestContext.setLocalEntityMetadata(metadataProvider.getEntityDescriptor(assertingPartyId));
 177                 requestContext.setLocalEntityRole(AttributeAuthorityDescriptor.DEFAULT_ELEMENT_NAME);
 178                 requestContext.setLocalEntityRoleMetadata(requestContext.getLocalEntityMetadata()
 179                         .getAttributeAuthorityDescriptor(SAMLConstants.SAML11P_NS));
 180
 181                 ArtifactResolutionConfiguration profileConfig = (ArtifactResolutionConfiguration) rpConfig
 182                         .getProfileConfiguration(ArtifactResolutionConfiguration.PROFILE_ID);
 183                 requestContext.setProfileConfiguration(profileConfig);
 184                 if (profileConfig.getSigningCredential() != null) {
 185                     requestContext.setOutboundSAMLMessageSigningCredential(profileConfig.getSigningCredential());
 186                 } else if (rpConfig.getDefaultSigningCredential() != null) {
 187                     requestContext.setOutboundSAMLMessageSigningCredential(rpConfig.getDefaultSigningCredential());
 188                 }
 189
 190             } catch (MetadataProviderException e) {
 191                 log.error("Unable to locate metadata for asserting or relying party");
 192                 requestContext
 193                         .setFailureStatus(buildStatus(StatusCode.RESPONDER, null, "Error locating party metadata"));
 194                 throw new ProfileException("Error locating party metadata");
 195             }
 196         }
 197     }
 198
 199     /**
 200      * Selects the appropriate endpoint for the relying party and stores it in the request context.
 201      *
 202      * @param requestContext current request context
 203      *
 204      * @return Endpoint selected from the information provided in the request context
 205      */
 206     protected Endpoint selectEndpoint(ArtifactResolutionRequestContext requestContext) {
 207         BasicEndpointSelector endpointSelector = new BasicEndpointSelector();
 208         endpointSelector.setEndpointType(AssertionConsumerService.DEFAULT_ELEMENT_NAME);
 209         endpointSelector.setMetadataProvider(getMetadataProvider());
 210         endpointSelector.setEntityMetadata(requestContext.getPeerEntityMetadata());
 211         endpointSelector.setEntityRoleMetadata(requestContext.getPeerEntityRoleMetadata());
 212         endpointSelector.setSamlRequest(requestContext.getInboundSAMLMessage());
 213         endpointSelector.getSupportedIssuerBindings().addAll(getSupportedOutboundBindings());
 214         return endpointSelector.selectEndpoint();
 215     }
 216
 217     /**
 218      * Derferences the provided artifacts and stores them in the request context.
 219      *
 220      * @param requestContext current request context
 221      */
 222     protected void derferenceArtifacts(ArtifactResolutionRequestContext requestContext) {
 223         Collection<AbstractSAML1Artifact> artifacts = requestContext.getArtifacts();
 224         if (artifacts != null) {
 225             ArrayList<Assertion> assertions = new ArrayList<Assertion>();
 226             SAMLArtifactMapEntry artifactEntry;
 227
 228             for (AbstractSAML1Artifact artifact : artifacts) {
 229                 artifactEntry = artifactMap.get(artifact.getArtifactBytes());
 230                 if (artifactEntry == null || artifactEntry.isExpired()) {
 231                     log.error("Unknown artifact.");
 232                 }
 233
 234                 if (!artifactEntry.getIssuerId().equals(requestContext.getLocalEntityId())) {
 235                     log.error("Artifact issuer mismatch.  Artifact issued by " + artifactEntry.getIssuerId()
 236                             + " but IdP has entity ID of " + requestContext.getLocalEntityId());
 237                 }
 238
 239                 if (!artifactEntry.getRelyingPartyId().equals(requestContext.getInboundMessageIssuer())) {
 240                     log.error("Artifact requester mismatch.  Artifact was issued to "
 241                             + artifactEntry.getRelyingPartyId() + " but was resolve request came from "
 242                             + requestContext.getInboundMessageIssuer());
 243                 }
 244                 artifactMap.remove(artifact.getArtifactBytes());
 245                 assertions.add((Assertion) artifactEntry.getSamlMessage());
 246             }
 247             requestContext.setReferencedAssertions(assertions);
 248         }
 249     }
 250
 251     /**
 252      * Builds the response to the artifact request.
 253      *
 254      * @param requestContext current request context
 255      *
 256      * @return response to the artifact request
 257      */
 258     protected Response buildArtifactResponse(ArtifactResolutionRequestContext requestContext) {
 259         DateTime issueInstant = new DateTime();
 260
 261         // create the SAML response and add the assertion
 262         Response samlResponse = responseBuilder.buildObject();
 263         samlResponse.setIssueInstant(issueInstant);
 264         populateStatusResponse(requestContext, samlResponse);
 265
 266         if (requestContext.getReferencedAssertions() != null) {
 267             samlResponse.getAssertions().addAll(requestContext.getReferencedAssertions());
 268         }
 269
 270         Status status = buildStatus(StatusCode.SUCCESS, null, null);
 271         samlResponse.setStatus(status);
 272
 273         return samlResponse;
 274     }
 275
 276     /** Represents the internal state of a SAML 1 Artiface resolver request while it's being processed by the IdP. */
 277     public class ArtifactResolutionRequestContext extends
 278             BaseSAML1ProfileRequestContext<Request, Response, ArtifactResolutionConfiguration> implements
 279             SAML1ArtifactMessageContext<Request, Response, NameIdentifier> {
 280
 281         /** Artifact to be resolved. */
 282         private Collection<AbstractSAML1Artifact> artifacts;
 283
 284         /** Message referenced by the SAML artifact. */
 285         private Collection<Assertion> referencedAssertions;
 286
 287         /**
 288          * Gets the artifacts to be resolved.
 289          *
 290          * @return artifacts to be resolved
 291          */
 292         public Collection<AbstractSAML1Artifact> getArtifacts() {
 293             return artifacts;
 294         }
 295
 296         /**
 297          * Sets the artifacts to be resolved.
 298          *
 299          * @param artifacts artifacts to be resolved
 300          */
 301         public void setArtifacts(Collection<AbstractSAML1Artifact> artifacts) {
 302             this.artifacts = artifacts;
 303         }
 304
 305         /**
 306          * Gets the SAML assertions referenced by the artifact(s).
 307          *
 308          * @return SAML assertions referenced by the artifact(s)
 309          */
 310         public Collection<Assertion> getReferencedAssertions() {
 311             return referencedAssertions;
 312         }
 313
 314         /**
 315          * Sets the SAML assertions referenced by the artifact(s).
 316          *
 317          * @param assertions SAML assertions referenced by the artifact(s)
 318          */
 319         public void setReferencedAssertions(Collection<Assertion> assertions) {
 320             referencedAssertions = assertions;
 321         }
 322     }
 323 }