/**
* Determines whether given AssertionConsumerService can be used to deliver messages consumable by
* this profile. Bindings POST and Artifact are supported for WebSSO.
*
* @param endpoint endpoint
* @return true if endpoint is supported
* @throws MetadataProviderException in case system can't verify whether endpoint is supported or
* not
*/
protected boolean isEndpointSupported(AssertionConsumerService endpoint)
throws MetadataProviderException {
return org.opensaml.common.xml.SAMLConstants.SAML2_POST_BINDING_URI.equals(
endpoint.getBinding())
| org.opensaml.common.xml.SAMLConstants.SAML2_ARTIFACT_BINDING_URI.equals(
endpoint.getBinding());
}
/**
* Determines endpoint where should the identity provider return the SAML message. Endpoint also
* implies the used binding. In case assertionConsumerIndex in the WebSSOProfileOptions is
* specified the endpoint with the given ID is used. Otherwise assertionConsumerService marked as
* default is used when present, otherwise first found supported assertionConsumerService is used.
*
* <p>In case endpoint determined by the webSSOProfileOptions index is not supported by the
* profile an exception is raised.
*
* @param options user supplied preferences
* @param idpSSODescriptor idp, can be null when no IDP is known in advance
* @param spDescriptor sp
* @return consumer service or null
* @throws MetadataProviderException in case index supplied in options is invalid or unsupported
* or no supported consumer service can be found
*/
protected AssertionConsumerService getAssertionConsumerService(
WebSSOProfileOptions options, IDPSSODescriptor idpSSODescriptor, SPSSODescriptor spDescriptor)
throws MetadataProviderException {
List<AssertionConsumerService> services = spDescriptor.getAssertionConsumerServices();
// Use user preference
if (options.getAssertionConsumerIndex() != null) {
for (AssertionConsumerService service : services) {
if (options.getAssertionConsumerIndex().equals(service.getIndex())) {
if (!isEndpointSupported(service)) {
throw new MetadataProviderException(
"Endpoint designated by the value in the WebSSOProfileOptions is not supported by this profile");
} else {
log.debug(
"Using consumer service determined by user preference with binding {}",
service.getBinding());
return service;
}
}
}
throw new MetadataProviderException(
"AssertionConsumerIndex "
+ options.getAssertionConsumerIndex()
+ " not found for spDescriptor "
+ spDescriptor);
}
// Use default
if (spDescriptor.getDefaultAssertionConsumerService() != null
&& isEndpointSupported(spDescriptor.getDefaultAssertionConsumerService())) {
AssertionConsumerService service = spDescriptor.getDefaultAssertionConsumerService();
log.debug("Using default consumer service with binding {}", service.getBinding());
log.debug("Default ACS url=" + service.getLocation());
return service;
}
// Iterate and find first match
if (services.size() > 0) {
for (AssertionConsumerService service : services) {
if (isEndpointSupported(service)) {
log.debug("Using first available consumer service with binding {}", service.getBinding());
return service;
}
}
}
throw new MetadataProviderException(
"Service provider has no assertion consumer service available for the selected profile "
+ spDescriptor);
}
private void init(InputStream inputStream) throws SAMLException {
BasicParserPool parsers = new BasicParserPool();
parsers.setNamespaceAware(true);
EntityDescriptor edesc;
try {
Document doc = parsers.parse(inputStream);
Element root = doc.getDocumentElement();
UnmarshallerFactory unmarshallerFactory = Configuration.getUnmarshallerFactory();
edesc = (EntityDescriptor) unmarshallerFactory.getUnmarshaller(root).unmarshall(root);
} catch (org.opensaml.xml.parse.XMLParserException e) {
throw new SAMLException(e);
} catch (org.opensaml.xml.io.UnmarshallingException e) {
throw new SAMLException(e);
}
// fetch sp information
SPSSODescriptor spDesc = edesc.getSPSSODescriptor("urn:oasis:names:tc:SAML:2.0:protocol");
if (spDesc == null) throw new SAMLException("No SP SSO descriptor found");
// get first redirect or post binding
String acsUrl = null;
for (AssertionConsumerService svc : spDesc.getAssertionConsumerServices()) {
if (svc.getBinding().equals(SAMLConstants.SAML2_REDIRECT_BINDING_URI)
|| svc.getBinding().equals(SAMLConstants.SAML2_POST_BINDING_URI)) {
acsUrl = svc.getLocation();
break;
}
}
if (acsUrl == null) throw new SAMLException("No acceptable Assertion Consumer Service found");
this.setEntityId(edesc.getEntityID());
this.setAcs(acsUrl);
}