HTTP Metadata provider

6 files changed, 221 insertions, 86 deletions

diff --git a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/binding/PostBinding.java b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/binding/PostBinding.java
index 97c5e8d20..85861297c 100644
--- a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/binding/PostBinding.java
+++ b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/binding/PostBinding.java
@@ -48,7 +48,8 @@ public class PostBinding implements IDecoder, IEncoder {
 			Credential credentials = CredentialProvider
 					.getIDPSigningCredential();
 
-//			VelocityEngine engine = VelocityProvider.getClassPathVelocityEngine();
+			// VelocityEngine engine =
+			// VelocityProvider.getClassPathVelocityEngine();
 			VelocityEngine engine = new VelocityEngine();
 			engine.setProperty(RuntimeConstants.ENCODING_DEFAULT, "UTF-8");
 			engine.setProperty(RuntimeConstants.OUTPUT_ENCODING, "UTF-8");
@@ -56,7 +57,8 @@ public class PostBinding implements IDecoder, IEncoder {
 			engine.setProperty(RuntimeConstants.RESOURCE_LOADER, "classpath");
 			engine.setProperty("classpath.resource.loader.class",
 					"org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
-			engine.setProperty(RuntimeConstants.RUNTIME_LOG_LOGSYSTEM_CLASS, "org.apache.velocity.runtime.log.SimpleLog4JLogSystem");
+			engine.setProperty(RuntimeConstants.RUNTIME_LOG_LOGSYSTEM_CLASS,
+					"org.apache.velocity.runtime.log.SimpleLog4JLogSystem");
 			engine.init();
 
 			HTTPPostEncoder encoder = new HTTPPostEncoder(engine,
@@ -94,19 +96,14 @@ public class PostBinding implements IDecoder, IEncoder {
 				.setInboundMessageTransport(new HttpServletRequestAdapter(req));
 		decode.setURIComparator(new MOAURICompare());
 		messageContext.setPeerEntityRole(SPSSODescriptor.DEFAULT_ELEMENT_NAME);
-		
-		try {
-			messageContext.setMetadataProvider(new MOAMetadataProvider());
-		} catch (MetadataProviderException e) {
-			Logger.error("Failed to get Metadata Provider");
-			throw new SecurityException("Failed to get Metadata Provider");
-		}
-		
+
+		messageContext.setMetadataProvider(MOAMetadataProvider.getInstance());
+
 		decode.decode(messageContext);
 
 		RequestAbstractType inboundMessage = (RequestAbstractType) messageContext
 				.getInboundMessage();
-		
+
 		MOARequest request = new MOARequest(inboundMessage);
 		request.setVerified(false);
 		request.setEntityMetadata(messageContext.getPeerEntityMetadata());
@@ -124,11 +121,11 @@ public class PostBinding implements IDecoder, IEncoder {
 				.setInboundMessageTransport(new HttpServletRequestAdapter(req));
 
 		messageContext.setPeerEntityRole(SPSSODescriptor.DEFAULT_ELEMENT_NAME);
-		
+
 		decode.decode(messageContext);
 
 		Response inboundMessage = (Response) messageContext.getInboundMessage();
-		
+
 		MOAResponse moaResponse = new MOAResponse(inboundMessage);
 		moaResponse.setVerified(false);
 		moaResponse.setEntityMetadata(messageContext.getPeerEntityMetadata());
diff --git a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/binding/RedirectBinding.java b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/binding/RedirectBinding.java
index 4e7b08b21..86801dde5 100644
--- a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/binding/RedirectBinding.java
+++ b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/binding/RedirectBinding.java
@@ -39,7 +39,7 @@ public class RedirectBinding implements IDecoder, IEncoder {
 	public void encodeRequest(HttpServletRequest req, HttpServletResponse resp,
 			RequestAbstractType request, String targetLocation)
 			throws MessageEncodingException, SecurityException {
-		//TODO: implement
+		// TODO: implement
 	}
 
 	public void encodeRespone(HttpServletRequest req, HttpServletResponse resp,
@@ -81,12 +81,7 @@ public class RedirectBinding implements IDecoder, IEncoder {
 		messageContext
 				.setInboundMessageTransport(new HttpServletRequestAdapter(req));
 
-		try {
-			messageContext.setMetadataProvider(new MOAMetadataProvider());
-		} catch (MetadataProviderException e) {
-			Logger.error("Failed to get Metadata Provider");
-			throw new SecurityException("Failed to get Metadata Provider");
-		}
+		messageContext.setMetadataProvider(MOAMetadataProvider.getInstance());
 
 		SAML2HTTPRedirectDeflateSignatureRule signatureRule = new SAML2HTTPRedirectDeflateSignatureRule(
 				TrustEngineFactory.getSignatureKnownKeysTrustEngine());
@@ -97,7 +92,7 @@ public class RedirectBinding implements IDecoder, IEncoder {
 				policy);
 		messageContext.setPeerEntityRole(SPSSODescriptor.DEFAULT_ELEMENT_NAME);
 		messageContext.setSecurityPolicyResolver(resolver);
-		
+
 		decode.decode(messageContext);
 
 		signatureRule.evaluate(messageContext);
@@ -131,12 +126,9 @@ public class RedirectBinding implements IDecoder, IEncoder {
 		messageContext.setPeerEntityRole(SPSSODescriptor.DEFAULT_ELEMENT_NAME);
 		messageContext.setSecurityPolicyResolver(resolver);
 		MOAMetadataProvider provider = null;
-		try {
-			provider = new MOAMetadataProvider();
-		} catch (MetadataProviderException e) {
-			Logger.error("Failed to get Metadata Provider");
-			throw new SecurityException("Failed to get Metadata Provider");
-		}
+
+		provider = MOAMetadataProvider.getInstance();
+
 		messageContext.setMetadataProvider(provider);
 
 		decode.decode(messageContext);
@@ -150,6 +142,7 @@ public class RedirectBinding implements IDecoder, IEncoder {
 	}
 
 	public boolean handleDecode(String action, HttpServletRequest req) {
-		return (action.equals(PVP2XProtocol.REDIRECT) && req.getMethod().equals("GET"));
+		return (action.equals(PVP2XProtocol.REDIRECT) && req.getMethod()
+				.equals("GET"));
 	}
 }
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 b38b862ef..e70830f93 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
@@ -1,46 +1,99 @@
 package at.gv.egovernment.moa.id.protocols.pvp2x.metadata;
 
 import java.io.File;
+import java.security.cert.CertificateException;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Timer;
 
 import javax.xml.namespace.QName;
 
+import org.apache.commons.httpclient.HttpClient;
+import org.apache.commons.httpclient.protocol.Protocol;
 import org.opensaml.saml2.metadata.EntitiesDescriptor;
 import org.opensaml.saml2.metadata.EntityDescriptor;
 import org.opensaml.saml2.metadata.RoleDescriptor;
 import org.opensaml.saml2.metadata.provider.ChainingMetadataProvider;
 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.saml2.metadata.provider.MetadataProviderException;
 import org.opensaml.xml.XMLObject;
 import org.opensaml.xml.parse.BasicParserPool;
 
-import at.gv.egovernment.moa.id.protocols.pvp2x.config.PVPConfiguration;
+import at.gv.egovernment.moa.id.auth.validator.parep.client.szrgw.SZRGWSecureSocketFactory;
+import at.gv.egovernment.moa.id.commons.db.ConfigurationDBRead;
+import at.gv.egovernment.moa.id.commons.db.dao.config.OAPVP2;
+import at.gv.egovernment.moa.id.commons.db.dao.config.OnlineApplication;
+import at.gv.egovernment.moa.id.config.auth.AuthConfigurationProvider;
 import at.gv.egovernment.moa.id.protocols.pvp2x.verification.MetadataSignatureFilter;
+import at.gv.egovernment.moa.id.util.SSLUtils;
 import at.gv.egovernment.moa.logging.Logger;
 
 public class MOAMetadataProvider implements MetadataProvider {
 
+	private static MOAMetadataProvider instance = null;
+
+	private static Object mutex = new Object();
+
+	public static MOAMetadataProvider getInstance() {
+		if (instance == null) {
+			synchronized (mutex) {
+				if (instance == null) {
+					instance = new MOAMetadataProvider();
+				}
+			}
+		}
+		return instance;
+	}
+
 	MetadataProvider internalProvider;
 
-	public MOAMetadataProvider() throws MetadataProviderException {
+	private MOAMetadataProvider() {
 		ChainingMetadataProvider chainProvider = new ChainingMetadataProvider();
 		Logger.info("Loading metadata");
-		List<String> files = PVPConfiguration.getInstance().getMetadataFiles();
-		Iterator<String> fileIt = files.iterator();
-		while (fileIt.hasNext()) {
-			String file = fileIt.next();
-			Logger.info("Loading metadata file: " + file);
-			FilesystemMetadataProvider fsProvider = new FilesystemMetadataProvider(
-					new File(file));
-			fsProvider.setParserPool(new BasicParserPool());
-			fsProvider.setRequireValidMetadata(true);
-			MetadataFilter filter = new MetadataSignatureFilter();
-			fsProvider.setMetadataFilter(filter);
-			chainProvider.addMetadataProvider(fsProvider);
-			fsProvider.initialize();
+		List<OnlineApplication> oaList = ConfigurationDBRead
+				.getAllActiveOnlineApplications();
+		Iterator<OnlineApplication> oaIt = oaList.iterator();
+		while (oaIt.hasNext()) {
+			try {
+				OnlineApplication oa = oaIt.next();
+				Logger.info("Loading metadata for: " + oa.getFriendlyName());
+				OAPVP2 pvp2Config = oa.getAuthComponentOA().getOAPVP2();
+				if (pvp2Config != null) {
+					String metadataURL = pvp2Config.getMetadataURL();
+					try {
+						// TODO: use proper SSL checking
+						HTTPMetadataProvider httpProvider = new HTTPMetadataProvider(
+								metadataURL, 20000);
+						httpProvider.setParserPool(new BasicParserPool());
+						httpProvider.setRequireValidMetadata(true);
+						MetadataFilter filter = new MetadataSignatureFilter(
+								metadataURL, pvp2Config.getCertificate());
+						httpProvider.setMetadataFilter(filter);
+						chainProvider.addMetadataProvider(httpProvider);
+						httpProvider.initialize();
+					} catch (MetadataProviderException e) {
+						Logger.error(
+								"Failed to add Metadata file for "
+										+ oa.getFriendlyName() + "[ "
+										+ e.getMessage() + " ]", e);
+					} catch (CertificateException e) {
+						Logger.error(
+								"Failed to add Metadata file for "
+										+ oa.getFriendlyName() + "[ "
+										+ e.getMessage() + " ]", e);
+					}
+				} else {
+					Logger.info(oa.getFriendlyName()
+							+ " is not a PVP2 Application skipping");
+				}
+			} catch (Throwable 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/verification/EntityVerifier.java b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/verification/EntityVerifier.java
index 42282f208..b78c2f264 100644
--- a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/verification/EntityVerifier.java
+++ b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/verification/EntityVerifier.java
@@ -1,5 +1,6 @@
 package at.gv.egovernment.moa.id.protocols.pvp2x.verification;
 
+import java.util.Iterator;
 import java.util.List;
 
 import org.opensaml.saml2.metadata.EntitiesDescriptor;
@@ -10,13 +11,34 @@ import org.opensaml.xml.signature.SignatureValidator;
 import org.opensaml.xml.validation.ValidationException;
 
 import at.gv.egovernment.moa.id.MOAIDException;
+import at.gv.egovernment.moa.id.commons.db.ConfigurationDBRead;
+import at.gv.egovernment.moa.id.commons.db.dao.config.OAPVP2;
+import at.gv.egovernment.moa.id.commons.db.dao.config.OnlineApplication;
 import at.gv.egovernment.moa.id.protocols.pvp2x.exceptions.NoCredentialsException;
 import at.gv.egovernment.moa.id.protocols.pvp2x.exceptions.SAMLRequestNotSignedException;
 import at.gv.egovernment.moa.id.protocols.pvp2x.signer.CredentialProvider;
 import at.gv.egovernment.moa.logging.Logger;
 
 public class EntityVerifier {
-	public static void verify(EntityDescriptor entityDescriptor) throws MOAIDException {
+
+	public static byte[] fetchSavedCredential(String entityID) {
+		List<OnlineApplication> oaList = ConfigurationDBRead
+				.getAllActiveOnlineApplications();
+		Iterator<OnlineApplication> oaIt = oaList.iterator();
+		while (oaIt.hasNext()) {
+			OnlineApplication oa = oaIt.next();
+			if (oa.getPublicURLPrefix().equals(entityID)) {
+				OAPVP2 pvp2Config = oa.getAuthComponentOA().getOAPVP2();
+				if (pvp2Config != null) {
+					return pvp2Config.getCertificate();
+				}
+			}
+		}
+		return null;
+	}
+
+	public static void verify(EntityDescriptor entityDescriptor)
+			throws MOAIDException {
 		if (entityDescriptor.getSignature() == null) {
 			throw new SAMLRequestNotSignedException();
 		}
@@ -28,22 +50,71 @@ public class EntityVerifier {
 			Logger.error("Failed to validate Signature", e);
 			throw new SAMLRequestNotSignedException(e);
 		}
-		
-		Credential credential = CredentialProvider.getSPTrustedCredential(entityDescriptor.getEntityID());
-		if(credential == null) {
+
+		Credential credential = CredentialProvider
+				.getSPTrustedCredential(entityDescriptor.getEntityID());
+		if (credential == null) {
 			throw new NoCredentialsException(entityDescriptor.getEntityID());
 		}
-		
+
 		SignatureValidator sigValidator = new SignatureValidator(credential);
 		try {
-		    sigValidator.validate(entityDescriptor.getSignature());
+			sigValidator.validate(entityDescriptor.getSignature());
+		} catch (ValidationException e) {
+			Logger.error("Failed to verfiy Signature", e);
+			throw new SAMLRequestNotSignedException(e);
+		}
+	}
+
+	public static void verify(EntityDescriptor entityDescriptor, Credential cred)
+			throws MOAIDException {
+		if (entityDescriptor.getSignature() == null) {
+			throw new SAMLRequestNotSignedException();
+		}
+
+		try {
+			SAMLSignatureProfileValidator sigValidator = new SAMLSignatureProfileValidator();
+			sigValidator.validate(entityDescriptor.getSignature());
+		} catch (ValidationException e) {
+			Logger.error("Failed to validate Signature", e);
+			throw new SAMLRequestNotSignedException(e);
+		}
+
+		SignatureValidator sigValidator = new SignatureValidator(cred);
+		try {
+			sigValidator.validate(entityDescriptor.getSignature());
+		} catch (ValidationException e) {
+			Logger.error("Failed to verfiy Signature", e);
+			throw new SAMLRequestNotSignedException(e);
+		}
+	}
+
+	public static void verify(EntitiesDescriptor entityDescriptor,
+			Credential cred) throws MOAIDException {
+		if (entityDescriptor.getSignature() == null) {
+			throw new SAMLRequestNotSignedException();
+		}
+
+		try {
+			SAMLSignatureProfileValidator sigValidator = new SAMLSignatureProfileValidator();
+			sigValidator.validate(entityDescriptor.getSignature());
+		} catch (ValidationException e) {
+			Logger.error("Failed to validate Signature", e);
+			throw new SAMLRequestNotSignedException(e);
+		}
+
+		SignatureValidator sigValidator = new SignatureValidator(cred);
+		try {
+			sigValidator.validate(entityDescriptor.getSignature());
+
 		} catch (ValidationException e) {
 			Logger.error("Failed to verfiy Signature", e);
 			throw new SAMLRequestNotSignedException(e);
 		}
 	}
-	
-	public static void verify(EntitiesDescriptor entityDescriptor) throws MOAIDException {
+
+	public static void verify(EntitiesDescriptor entityDescriptor)
+			throws MOAIDException {
 		if (entityDescriptor.getSignature() == null) {
 			throw new SAMLRequestNotSignedException();
 		}
@@ -56,32 +127,34 @@ public class EntityVerifier {
 			throw new SAMLRequestNotSignedException(e);
 		}
 
-		List<EntityDescriptor> entities = entityDescriptor.getEntityDescriptors();
-		
+		List<EntityDescriptor> entities = entityDescriptor
+				.getEntityDescriptors();
+
 		if (entities.size() > 0) {
-			
+
 			if (entities.size() > 1) {
 				Logger.warn("More then one EntityID in Metadatafile with Name "
-						+ entityDescriptor.getName() + " defined. Actually only the first"
+						+ entityDescriptor.getName()
+						+ " defined. Actually only the first"
 						+ " entryID is used to select the certificate to perform Metadata verification.");
 			}
-			
-			Credential credential = CredentialProvider.getSPTrustedCredential(entities.get(0).getEntityID());
-			
-			if(credential == null) {
+
+			Credential credential = CredentialProvider
+					.getSPTrustedCredential(entities.get(0).getEntityID());
+
+			if (credential == null) {
 				throw new NoCredentialsException("moaID IDP");
 			}
-		
+
 			SignatureValidator sigValidator = new SignatureValidator(credential);
 			try {
 				sigValidator.validate(entityDescriptor.getSignature());
-				
+
 			} catch (ValidationException e) {
 				Logger.error("Failed to verfiy Signature", e);
 				throw new SAMLRequestNotSignedException(e);
-			}			
+			}
 		}
 	}
-	
-	
+
 }
diff --git a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/verification/MetadataSignatureFilter.java b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/verification/MetadataSignatureFilter.java
index 19176af1f..36dc2442c 100644
--- a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/verification/MetadataSignatureFilter.java
+++ b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/verification/MetadataSignatureFilter.java
@@ -1,5 +1,8 @@
 package at.gv.egovernment.moa.id.protocols.pvp2x.verification;
 
+import iaik.x509.X509Certificate;
+
+import java.security.cert.CertificateException;
 import java.util.Iterator;
 
 import org.opensaml.saml2.metadata.EntitiesDescriptor;
@@ -7,13 +10,29 @@ import org.opensaml.saml2.metadata.EntityDescriptor;
 import org.opensaml.saml2.metadata.provider.FilterException;
 import org.opensaml.saml2.metadata.provider.MetadataFilter;
 import org.opensaml.xml.XMLObject;
+import org.opensaml.xml.security.credential.Credential;
+import org.opensaml.xml.security.x509.BasicX509Credential;
 
 import at.gv.egovernment.moa.id.MOAIDException;
 import at.gv.egovernment.moa.logging.Logger;
 
 public class MetadataSignatureFilter implements MetadataFilter {
 	
+	private String metadataURL;
+	private BasicX509Credential savedCredential;
+	
+	public MetadataSignatureFilter(String url, byte[] certificate) 
+			throws CertificateException {
+		this.metadataURL = url;
+		X509Certificate cert = new X509Certificate(certificate);
+		savedCredential = new BasicX509Credential();
+		savedCredential.setEntityCertificate(cert);
+	}
+	
 	public void processEntityDescriptorr(EntityDescriptor desc) throws MOAIDException {
+		
+		String entityID = desc.getEntityID();
+		
 		EntityVerifier.verify(desc);
 	}
 	
@@ -21,7 +40,7 @@ public class MetadataSignatureFilter implements MetadataFilter {
 		Iterator<EntitiesDescriptor> entID = desc.getEntitiesDescriptors().iterator();
 		
 		if(desc.getSignature() != null) {
-			EntityVerifier.verify(desc);
+			EntityVerifier.verify(desc, this.savedCredential);
 		}
 		
 		while(entID.hasNext()) {
@@ -39,12 +58,15 @@ public class MetadataSignatureFilter implements MetadataFilter {
 		try {
 			if (metadata instanceof EntitiesDescriptor) {
 				EntitiesDescriptor entitiesDescriptor = (EntitiesDescriptor) metadata;
+				if(entitiesDescriptor.getSignature() == null) {
+					throw new MOAIDException("Root element of metadata file has to be signed", null);
+				}
 				processEntitiesDescriptor(entitiesDescriptor);
-			} else if (metadata instanceof EntityDescriptor) {
+			} /*else if (metadata instanceof EntityDescriptor) {
 				EntityDescriptor entityDescriptor = (EntityDescriptor) metadata;
 				processEntityDescriptorr(entityDescriptor);
-			} else {
-				throw new MOAIDException("Invalid Metadata file", null);
+			} */else {
+				throw new MOAIDException("Invalid Metadata file Root element is no EntitiesDescriptor", null);
 			}
 			Logger.info("Metadata Filter done OK");
 		} catch (MOAIDException e) {
diff --git a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/verification/TrustEngineFactory.java b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/verification/TrustEngineFactory.java
index 60de84161..f3c5ed86a 100644
--- a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/verification/TrustEngineFactory.java
+++ b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/pvp2x/verification/TrustEngineFactory.java
@@ -26,7 +26,7 @@ public class TrustEngineFactory {
 	public static SignatureTrustEngine getSignatureTrustEngine() {
 		try {
 			MetadataPKIXValidationInformationResolver mdResolver = new MetadataPKIXValidationInformationResolver(
-					new MOAMetadataProvider());
+					MOAMetadataProvider.getInstance());
 
 			List<KeyInfoProvider> keyInfoProvider = new ArrayList<KeyInfoProvider>();
 			keyInfoProvider.add(new DSAKeyValueProvider());
@@ -49,26 +49,23 @@ public class TrustEngineFactory {
 
 	public static SignatureTrustEngine getSignatureKnownKeysTrustEngine() {
 		MetadataCredentialResolver resolver;
-		try {
-			resolver = new MetadataCredentialResolver(new MOAMetadataProvider());
 
-			List<KeyInfoProvider> keyInfoProvider = new ArrayList<KeyInfoProvider>();
-			keyInfoProvider.add(new DSAKeyValueProvider());
-			keyInfoProvider.add(new RSAKeyValueProvider());
-			keyInfoProvider.add(new InlineX509DataProvider());
+		resolver = new MetadataCredentialResolver(
+				MOAMetadataProvider.getInstance());
 
-			KeyInfoCredentialResolver keyInfoResolver = new BasicProviderKeyInfoCredentialResolver(
-					keyInfoProvider);
+		List<KeyInfoProvider> keyInfoProvider = new ArrayList<KeyInfoProvider>();
+		keyInfoProvider.add(new DSAKeyValueProvider());
+		keyInfoProvider.add(new RSAKeyValueProvider());
+		keyInfoProvider.add(new InlineX509DataProvider());
 
-			ExplicitKeySignatureTrustEngine engine = new ExplicitKeySignatureTrustEngine(
-					resolver, keyInfoResolver);
+		KeyInfoCredentialResolver keyInfoResolver = new BasicProviderKeyInfoCredentialResolver(
+				keyInfoProvider);
+
+		ExplicitKeySignatureTrustEngine engine = new ExplicitKeySignatureTrustEngine(
+				resolver, keyInfoResolver);
+
+		return engine;
 
-			return engine;
-		} catch (MetadataProviderException e) {
-			// TODO Auto-generated catch block
-			e.printStackTrace();
-			return null;
-		}
 	}
-	
+
 }