update MOA SAML2 metadata provider to support metadata located on file system

4 files changed, 190 insertions, 88 deletions

diff --git a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/metadata/MOAMetadataProvider.java b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/metadata/MOAMetadataProvider.java
index b2597c3cb..5380d7f53 100644
--- a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/metadata/MOAMetadataProvider.java
+++ b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/metadata/MOAMetadataProvider.java
@@ -38,6 +38,7 @@ import javax.xml.namespace.QName;
 import org.opensaml.saml2.metadata.EntitiesDescriptor;
 import org.opensaml.saml2.metadata.EntityDescriptor;
 import org.opensaml.saml2.metadata.RoleDescriptor;
+import org.opensaml.saml2.metadata.provider.BaseMetadataProvider;
 import org.opensaml.saml2.metadata.provider.ChainingMetadataProvider;
 import org.opensaml.saml2.metadata.provider.HTTPMetadataProvider;
 import org.opensaml.saml2.metadata.provider.MetadataFilter;
@@ -45,6 +46,7 @@ import org.opensaml.saml2.metadata.provider.MetadataProvider;
 import org.opensaml.saml2.metadata.provider.MetadataProviderException;
 import org.opensaml.saml2.metadata.provider.ObservableMetadataProvider;
 import org.opensaml.xml.XMLObject;
+import org.opensaml.xml.parse.BasicParserPool;
 import org.springframework.stereotype.Service;
 
 import at.gv.egovernment.moa.id.auth.IDestroyableObject;
@@ -52,7 +54,6 @@ import at.gv.egovernment.moa.id.auth.IGarbageCollectorProcessing;
 import at.gv.egovernment.moa.id.commons.api.IOAAuthParameters;
 import at.gv.egovernment.moa.id.commons.api.exceptions.ConfigurationException;
 import at.gv.egovernment.moa.id.commons.config.MOAIDConfigurationConstants;
-import at.gv.egovernment.moa.id.config.auth.AuthConfigurationProviderFactory;
 import at.gv.egovernment.moa.id.protocols.pvp2x.verification.metadata.InterfederatedIDPPublicServiceFilter;
 import at.gv.egovernment.moa.id.protocols.pvp2x.verification.metadata.PVPMetadataFilterChain;
 import at.gv.egovernment.moa.id.protocols.pvp2x.verification.metadata.SchemaValidationFilter;
@@ -154,7 +155,7 @@ public class MOAMetadataProvider extends SimpleMOAMetadataProvider
 			
 			//reload metadata provider 
 			IOAAuthParameters oaParam = 
-					AuthConfigurationProviderFactory.getInstance().getOnlineApplicationParameter(entityID);
+					authConfig.getOnlineApplicationParameter(entityID);
 			if (oaParam != null) {
 				String metadataURL = oaParam.getConfigurationValue(MOAIDConfigurationConstants.SERVICE_PROTOCOLS_PVP2X_URL);
 				if (MiscUtil.isNotEmpty(metadataURL)) {
@@ -178,10 +179,11 @@ public class MOAMetadataProvider extends SimpleMOAMetadataProvider
 							timer = new Timer(true);
 						
 						ChainingMetadataProvider chainProvider = (ChainingMetadataProvider) internalProvider;						
-						HTTPMetadataProvider newMetadataProvider = createNewHTTPMetaDataProvider(metadataURL, 								 
+						MetadataProvider newMetadataProvider = createNewMoaMetadataProvider(metadataURL, 								 
 								buildMetadataFilterChain(oaParam, metadataURL, cert), 
 								oaFriendlyName,
-								timer);
+								timer,
+								new BasicParserPool());
 						
 						chainProvider.addMetadataProvider(newMetadataProvider);
 						
@@ -203,9 +205,6 @@ public class MOAMetadataProvider extends SimpleMOAMetadataProvider
 				Logger.debug("Can not refresh PVP2X metadata: NO onlineApplication with Id: " + entityID);
 				
 						
-		} catch (ConfigurationException e) {
-			Logger.warn("Access MOA-ID configuration FAILED.", e);
-			
 		} catch (MetadataProviderException e) {
 			Logger.warn("Refresh PVP2X metadata for onlineApplication: " 
 					+ entityID + " FAILED.", e);
@@ -268,7 +267,7 @@ public class MOAMetadataProvider extends SimpleMOAMetadataProvider
 									
 			//load all PVP2 OAs form ConfigurationDatabase and 
 			//compare actually loaded Providers with configured PVP2 OAs
-			Map<String, String> allOAs = AuthConfigurationProviderFactory.getInstance().getConfigurationWithWildCard(
+			Map<String, String> allOAs = authConfig.getConfigurationWithWildCard(
 					MOAIDConfigurationConstants.PREFIX_MOAID_SERVICES 
 					+ ".%." 
 					+ MOAIDConfigurationConstants.SERVICE_UNIQUEIDENTIFIER);
@@ -279,7 +278,7 @@ public class MOAMetadataProvider extends SimpleMOAMetadataProvider
 					Entry<String, String> oaKeyPair = oaInterator.next();
 					
 					IOAAuthParameters oaParam = 
-							AuthConfigurationProviderFactory.getInstance().getOnlineApplicationParameter(oaKeyPair.getValue());
+							authConfig.getOnlineApplicationParameter(oaKeyPair.getValue());
 					if (oaParam != null) {
 						String metadataurl = oaParam.getConfigurationValue(MOAIDConfigurationConstants.SERVICE_PROTOCOLS_PVP2X_URL);
 						
@@ -409,83 +408,79 @@ public class MOAMetadataProvider extends SimpleMOAMetadataProvider
 		ChainingMetadataProvider chainProvider = new ChainingMetadataProvider();
 		Logger.info("Loading metadata");		
 		Map<String, MetadataProvider> providersinuse = new HashMap<String, MetadataProvider>();
-		try {
-			Map<String, String> allOAs = AuthConfigurationProviderFactory.getInstance().getConfigurationWithWildCard(
-					MOAIDConfigurationConstants.PREFIX_MOAID_SERVICES 
-					+ ".%." 
-					+ MOAIDConfigurationConstants.SERVICE_UNIQUEIDENTIFIER);
-			
-			if (allOAs != null) {
-				Iterator<Entry<String, String>> oaInterator = allOAs.entrySet().iterator();
-				while (oaInterator.hasNext()) {
-					Entry<String, String> oaKeyPair = oaInterator.next();
-					
-					IOAAuthParameters oaParam = 
-							AuthConfigurationProviderFactory.getInstance().getOnlineApplicationParameter(oaKeyPair.getValue());
-					if (oaParam != null) {
-						String metadataurl = oaParam.getConfigurationValue(MOAIDConfigurationConstants.SERVICE_PROTOCOLS_PVP2X_URL);
-						String oaFriendlyName = oaParam.getFriendlyName();
-						HTTPMetadataProvider httpProvider = null;
+		Map<String, String> allOAs = authConfig.getConfigurationWithWildCard(
+				MOAIDConfigurationConstants.PREFIX_MOAID_SERVICES 
+				+ ".%." 
+				+ MOAIDConfigurationConstants.SERVICE_UNIQUEIDENTIFIER);
+		
+		if (allOAs != null) {
+			Iterator<Entry<String, String>> oaInterator = allOAs.entrySet().iterator();
+			while (oaInterator.hasNext()) {
+				Entry<String, String> oaKeyPair = oaInterator.next();
 				
-						try {
-							String certBase64 = oaParam.getConfigurationValue(MOAIDConfigurationConstants.SERVICE_PROTOCOLS_PVP2X_CERTIFICATE);
-							if (MiscUtil.isNotEmpty(certBase64) && MiscUtil.isNotEmpty(metadataurl)) {
-								byte[] cert = Base64Utils.decode(certBase64, false);
-								
-								
-								if (timer == null)
-									timer = new Timer(true);
-								
-								Logger.info("Loading metadata for: " + oaFriendlyName);					
-								if (!providersinuse.containsKey(metadataurl)) {					
-									httpProvider = createNewHTTPMetaDataProvider(
-											metadataurl, 
-											buildMetadataFilterChain(oaParam, metadataurl, cert),
-											oaFriendlyName,
-											timer);
-						
-									if (httpProvider != null)
-										providersinuse.put(metadataurl, httpProvider);
+				IOAAuthParameters oaParam = 
+						authConfig.getOnlineApplicationParameter(oaKeyPair.getValue());
+				if (oaParam != null) {
+					String metadataurl = oaParam.getConfigurationValue(MOAIDConfigurationConstants.SERVICE_PROTOCOLS_PVP2X_URL);
+					String oaFriendlyName = oaParam.getFriendlyName();
+					MetadataProvider httpProvider = null;
+			
+					try {
+						String certBase64 = oaParam.getConfigurationValue(MOAIDConfigurationConstants.SERVICE_PROTOCOLS_PVP2X_CERTIFICATE);
+						if (MiscUtil.isNotEmpty(certBase64) && MiscUtil.isNotEmpty(metadataurl)) {
+							byte[] cert = Base64Utils.decode(certBase64, false);
 							
-								} else {
-									Logger.info(metadataurl + " are already added.");
-								}
+							
+							if (timer == null)
+								timer = new Timer(true);
+							
+							Logger.info("Loading metadata for: " + oaFriendlyName);					
+							if (!providersinuse.containsKey(metadataurl)) {					
+								httpProvider = createNewMoaMetadataProvider(
+										metadataurl, 
+										buildMetadataFilterChain(oaParam, metadataurl, cert),
+										oaFriendlyName,
+										timer,
+										new BasicParserPool());
+					
+								if (httpProvider != null)
+									providersinuse.put(metadataurl, httpProvider);
 						
 							} else {
-								Logger.info(oaFriendlyName
-										+ " is not a PVP2 Application skipping");
+								Logger.info(metadataurl + " are already added.");
 							}
-						} catch (Throwable e) {
-							Logger.error(
-									"Failed to add Metadata (unhandled reason: "
-											+ e.getMessage(), e);
 					
-							if (httpProvider != null) {
-								Logger.debug("Destroy failed Metadata provider");
-								httpProvider.destroy();
-							}
-						}			
-					}
-				}
+						} else {
+							Logger.info(oaFriendlyName
+									+ " is not a PVP2 Application skipping");
+						}
+					} catch (Throwable e) {
+						Logger.error(
+								"Failed to add Metadata (unhandled reason: "
+										+ e.getMessage(), e);
 				
-			} else 
-				Logger.info("No Online-Application configuration found. PVP 2.1 metadata provider initialization failed!");
-					
-			try {
-				chainProvider.setProviders(new ArrayList<MetadataProvider>(providersinuse.values()));
-				
-			} catch (MetadataProviderException e) {
-				Logger.error(
-						"Failed to add Metadata (unhandled reason: "
-								+ e.getMessage(), e);
+						if (httpProvider != null && httpProvider instanceof BaseMetadataProvider) {
+							Logger.debug("Destroy failed Metadata provider");
+							((BaseMetadataProvider)httpProvider).destroy();
+							
+						}
+					}			
+				}
 			}
 			
-			internalProvider = chainProvider;
-			
-		} catch (ConfigurationException e) {
-			Logger.error("Access MOA-ID configuration FAILED.", e);
+		} else 
+			Logger.info("No Online-Application configuration found. PVP 2.1 metadata provider initialization failed!");
+				
+		try {
+			chainProvider.setProviders(new ArrayList<MetadataProvider>(providersinuse.values()));
 			
+		} catch (MetadataProviderException e) {
+			Logger.error(
+					"Failed to add Metadata (unhandled reason: "
+							+ e.getMessage(), e);
 		}
+		
+		internalProvider = chainProvider;
 				
 	}
 		
diff --git a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/metadata/SimpleMOAMetadataProvider.java b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/metadata/SimpleMOAMetadataProvider.java
index d5c7d9100..e060e18e1 100644
--- a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/metadata/SimpleMOAMetadataProvider.java
+++ b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/metadata/SimpleMOAMetadataProvider.java
@@ -22,15 +22,19 @@
  */
 package at.gv.egovernment.moa.id.protocols.pvp2x.metadata;
 
+import java.io.File;
 import java.util.Timer;
 
 import javax.net.ssl.SSLHandshakeException;
 
 import org.apache.commons.httpclient.MOAHttpClient;
+import org.apache.commons.httpclient.params.HttpClientParams;
+import org.opensaml.saml2.metadata.provider.FilesystemMetadataProvider;
 import org.opensaml.saml2.metadata.provider.HTTPMetadataProvider;
 import org.opensaml.saml2.metadata.provider.MetadataFilter;
 import org.opensaml.saml2.metadata.provider.MetadataProvider;
-import org.opensaml.xml.parse.BasicParserPool;
+import org.opensaml.xml.parse.ParserPool;
+import org.springframework.beans.factory.annotation.Autowired;
 
 import at.gv.egovernment.moa.id.commons.api.AuthConfiguration;
 import at.gv.egovernment.moa.id.commons.ex.MOAHttpProtocolSocketFactoryException;
@@ -40,6 +44,7 @@ import at.gv.egovernment.moa.id.protocols.pvp2x.PVPConstants;
 import at.gv.egovernment.moa.id.protocols.pvp2x.exceptions.filter.SchemaValidationException;
 import at.gv.egovernment.moa.id.protocols.pvp2x.exceptions.filter.SignatureValidationException;
 import at.gv.egovernment.moa.logging.Logger;
+import at.gv.egovernment.moa.util.FileUtils;
 
 /**
  * @author tlenz
@@ -47,6 +52,104 @@ import at.gv.egovernment.moa.logging.Logger;
  */
 public abstract class SimpleMOAMetadataProvider implements MetadataProvider{
 	
+	private static final String URI_PREFIX_HTTP = "http:";
+	private static final String URI_PREFIX_HTTPS = "https:";
+	private static final String URI_PREFIX_FILE = "file:";
+	
+	
+	@Autowired 
+	protected AuthConfiguration authConfig;
+	
+	/**
+	 * Create a single SAML2 MOA specific metadata provider
+	 * 
+	 * @param metadataLocation where the metadata should be loaded, but never null. If the location starts with http(s):, than a http
+	 *  based metadata provider is used. If the location starts with file:, than a filesystem based metadata provider is used
+	 * @param filter Filters, which should be used to validate the metadata
+	 * @param IdForLogging Id, which is used for Logging
+	 * @param timer {@link Timer} which is used to schedule metadata refresh operations
+	 * 
+	 * @return SAML2 Metadata Provider, or null if the metadata provider can not initialized
+	 */
+	protected MetadataProvider createNewMoaMetadataProvider(String metadataLocation, MetadataFilter filter, 
+			String IdForLogging, Timer timer, ParserPool pool) {
+		if (metadataLocation.startsWith(URI_PREFIX_HTTP) || metadataLocation.startsWith(URI_PREFIX_HTTPS)) 
+			return createNewHTTPMetaDataProvider(metadataLocation, filter, IdForLogging, timer, pool);
+		
+		else {
+			String absoluteMetadataLocation = FileUtils.makeAbsoluteURL(
+					metadataLocation,
+					authConfig.getRootConfigFileDir());
+			
+			if (absoluteMetadataLocation.startsWith(URI_PREFIX_FILE)) {
+				File metadataFile = new File(absoluteMetadataLocation);
+				if (metadataFile.exists())
+					return createNewFileSystemMetaDataProvider(metadataFile, filter, IdForLogging, timer, pool);
+				
+				else {
+					Logger.warn("SAML2 metadata file: " + absoluteMetadataLocation + " not found or not exist");
+					return null;
+				}
+				
+			}			
+		}
+		
+		Logger.warn("SAML2 metadata has an unsupported metadata location prefix: " + metadataLocation);		
+		return null;
+		
+	}
+	
+	
+	/**
+	 * Create a single SAML2 filesystem based metadata provider
+	 * 
+	 * @param metadataFile File, where the metadata should be loaded
+	 * @param filter Filters, which should be used to validate the metadata
+	 * @param IdForLogging Id, which is used for Logging
+	 * @param timer {@link Timer} which is used to schedule metadata refresh operations
+	 * @param pool 
+	 * 
+	 * @return SAML2 Metadata Provider
+	 */	
+	private MetadataProvider createNewFileSystemMetaDataProvider(File metadataFile, MetadataFilter filter, String IdForLogging, Timer timer, ParserPool pool) {
+		FilesystemMetadataProvider fileSystemProvider = null;
+		try {
+			fileSystemProvider = new FilesystemMetadataProvider(timer, metadataFile);
+			fileSystemProvider.setParserPool(pool);
+			fileSystemProvider.setRequireValidMetadata(true);
+			fileSystemProvider.setMinRefreshDelay(1000*60*15); //15 minutes
+			fileSystemProvider.setMaxRefreshDelay(1000*60*60*24); //24 hours
+			//httpProvider.setRefreshDelayFactor(0.1F);
+			
+			fileSystemProvider.setMetadataFilter(filter);
+			fileSystemProvider.initialize();
+			
+			fileSystemProvider.setRequireValidMetadata(true);
+			
+			return fileSystemProvider;
+						
+		} catch (Exception e) {
+			Logger.warn(
+					"Failed to load Metadata file for "
+							+ IdForLogging + "[ "
+							+ "File: " + metadataFile.getAbsolutePath()
+							+ " Msg: " + e.getMessage() + " ]", e);
+			
+			
+			Logger.warn("Can not initialize SAML2 metadata provider from filesystem: " + metadataFile.getAbsolutePath()
+					+ " Reason: " + e.getMessage(), e);
+			
+			if (fileSystemProvider != null)
+				fileSystemProvider.destroy();
+			
+		}
+				
+		return null;
+				
+	}
+	
+	
+	
 	/**
 	 * Create a single SAML2 HTTP metadata provider
 	 * 
@@ -54,16 +157,21 @@ public abstract class SimpleMOAMetadataProvider implements MetadataProvider{
 	 * @param filter Filters, which should be used to validate the metadata
 	 * @param IdForLogging Id, which is used for Logging
 	 * @param timer {@link Timer} which is used to schedule metadata refresh operations
+	 * @param pool 
 	 * 
 	 * @return SAML2 Metadata Provider
 	 */
-	protected HTTPMetadataProvider createNewHTTPMetaDataProvider(String metadataURL, MetadataFilter filter, String IdForLogging, Timer timer) {
+	private MetadataProvider createNewHTTPMetaDataProvider(String metadataURL, MetadataFilter filter, String IdForLogging, Timer timer, ParserPool pool) {
 		HTTPMetadataProvider httpProvider = null;
 		//Timer timer= null;
 		MOAHttpClient httpClient = null;
 		try {			
 			httpClient = new MOAHttpClient();
 			
+			HttpClientParams httpClientParams = new HttpClientParams();
+			httpClientParams.setSoTimeout(AuthConfiguration.CONFIG_PROPS_METADATA_SOCKED_TIMEOUT);
+			httpClient.setParams(httpClientParams);
+			
 			if (metadataURL.startsWith("https:")) {
 				try {
 					//FIX: change hostname validation default flag to true when httpClient is updated to > 4.4
@@ -88,7 +196,7 @@ public abstract class SimpleMOAMetadataProvider implements MetadataProvider{
 //			timer = new Timer(true);
 			httpProvider = new HTTPMetadataProvider(timer, httpClient, 
 					metadataURL);
-			httpProvider.setParserPool(new BasicParserPool());
+			httpProvider.setParserPool(pool);
 			httpProvider.setRequireValidMetadata(true);
 			httpProvider.setMinRefreshDelay(1000*60*15); //15 minutes
 			httpProvider.setMaxRefreshDelay(1000*60*60*24); //24 hours
@@ -115,7 +223,7 @@ public abstract class SimpleMOAMetadataProvider implements MetadataProvider{
 						+ metadataURL + " FAILED.", e);								
 			}
 			
-			Logger.error(
+			Logger.warn(
 					"Failed to load Metadata file for "
 							+ IdForLogging + "[ "
 							+ e.getMessage() + " ]", e);
diff --git a/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/api/AuthConfiguration.java b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/api/AuthConfiguration.java
index fcf4c3ffa..4df11b35c 100644
--- a/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/api/AuthConfiguration.java
+++ b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/api/AuthConfiguration.java
@@ -16,7 +16,8 @@ public interface AuthConfiguration extends ConfigurationProvider{
 	
 	public static final String DEFAULT_X509_CHAININGMODE = "pkix";
 
-
+	public static final int CONFIG_PROPS_METADATA_SOCKED_TIMEOUT = 20 * 1000;  	//20 seconds metadata socked timeout
+	
 	
 	public Properties getGeneralPVP2ProperiesConfig();
 
diff --git a/id/server/modules/moa-id-module-elga_mandate_service/src/main/java/at/gv/egovernment/moa/id/auth/modules/elgamandates/utils/ELGAMandateServiceMetadataProvider.java b/id/server/modules/moa-id-module-elga_mandate_service/src/main/java/at/gv/egovernment/moa/id/auth/modules/elgamandates/utils/ELGAMandateServiceMetadataProvider.java
index b35ffdf62..adc2a310b 100644
--- a/id/server/modules/moa-id-module-elga_mandate_service/src/main/java/at/gv/egovernment/moa/id/auth/modules/elgamandates/utils/ELGAMandateServiceMetadataProvider.java
+++ b/id/server/modules/moa-id-module-elga_mandate_service/src/main/java/at/gv/egovernment/moa/id/auth/modules/elgamandates/utils/ELGAMandateServiceMetadataProvider.java
@@ -36,12 +36,11 @@ import org.opensaml.saml2.metadata.provider.MetadataFilter;
 import org.opensaml.saml2.metadata.provider.MetadataProvider;
 import org.opensaml.saml2.metadata.provider.MetadataProviderException;
 import org.opensaml.xml.XMLObject;
-import org.springframework.beans.factory.annotation.Autowired;
+import org.opensaml.xml.parse.BasicParserPool;
 import org.springframework.stereotype.Service;
 
 import at.gv.egovernment.moa.id.auth.IDestroyableObject;
 import at.gv.egovernment.moa.id.auth.modules.elgamandates.ELGAMandatesAuthConstants;
-import at.gv.egovernment.moa.id.commons.api.AuthConfiguration;
 import at.gv.egovernment.moa.id.protocols.pvp2x.metadata.SimpleMOAMetadataProvider;
 import at.gv.egovernment.moa.id.protocols.pvp2x.verification.metadata.MOASPMetadataSignatureFilter;
 import at.gv.egovernment.moa.id.protocols.pvp2x.verification.metadata.SchemaValidationFilter;
@@ -57,8 +56,6 @@ import at.gv.egovernment.moa.util.MiscUtil;
 @Service("ELGAMandate_MetadataProvider")
 public class ELGAMandateServiceMetadataProvider extends SimpleMOAMetadataProvider
 	implements IDestroyableObject {
-
-	@Autowired AuthConfiguration authConfig;
 	
 	private ChainingMetadataProvider metadataProvider = new ChainingMetadataProvider();
 	private Timer timer = null;
@@ -256,11 +253,12 @@ public class ELGAMandateServiceMetadataProvider extends SimpleMOAMetadataProvide
 			filter.addFilter(new SchemaValidationFilter(true));
 			filter.addFilter(new MOASPMetadataSignatureFilter(trustProfileID));
 		
-			HTTPMetadataProvider idpMetadataProvider = createNewHTTPMetaDataProvider(metdataURL, 
+			MetadataProvider idpMetadataProvider = createNewMoaMetadataProvider(metdataURL, 
 					filter, 
-					ELGAMandatesAuthConstants.MODULE_NAME_FOR_LOGGING,
-					timer);
-		
+					ELGAMandatesAuthConstants.MODULE_NAME_FOR_LOGGING,					
+					timer,
+					new BasicParserPool());
+			
 			if (idpMetadataProvider == null) {
 				Logger.error("Create ELGA Mandate-Service Client FAILED.");
 				throw new MetadataProviderException("Can not initialize ELGA Mandate-Service metadata provider.");