From 3aadcf8f877a560bed75af7e0db918aa26ef2a03 Mon Sep 17 00:00:00 2001 From: mcentner Date: Thu, 4 Dec 2008 10:00:31 +0000 Subject: Refactoring of infobox implementation. git-svn-id: https://joinup.ec.europa.eu/svn/mocca/trunk@232 8a26b1a7-26f0-462f-b9ef-d0e30c41f5a4 --- .../at/gv/egiz/bku/slcommands/impl/STALHelper.java | 218 +++++++++++++++++++++ 1 file changed, 218 insertions(+) create mode 100644 bkucommon/src/main/java/at/gv/egiz/bku/slcommands/impl/STALHelper.java (limited to 'bkucommon/src/main/java/at/gv/egiz/bku/slcommands/impl/STALHelper.java') diff --git a/bkucommon/src/main/java/at/gv/egiz/bku/slcommands/impl/STALHelper.java b/bkucommon/src/main/java/at/gv/egiz/bku/slcommands/impl/STALHelper.java new file mode 100644 index 00000000..969288c1 --- /dev/null +++ b/bkucommon/src/main/java/at/gv/egiz/bku/slcommands/impl/STALHelper.java @@ -0,0 +1,218 @@ +/* +* Copyright 2008 Federal Chancellery Austria and +* Graz University of Technology +* +* Licensed under the Apache License, Version 2.0 (the "License"); +* you may not use this file except in compliance with the License. +* You may obtain a copy of the License at +* +* http://www.apache.org/licenses/LICENSE-2.0 +* +* Unless required by applicable law or agreed to in writing, software +* distributed under the License is distributed on an "AS IS" BASIS, +* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* See the License for the specific language governing permissions and +* limitations under the License. +*/ +package at.gv.egiz.bku.slcommands.impl; + +import iaik.asn1.CodingException; +import iaik.asn1.DerCoder; + +import java.io.ByteArrayInputStream; +import java.security.cert.CertificateException; +import java.security.cert.CertificateFactory; +import java.security.cert.X509Certificate; +import java.util.ArrayList; +import java.util.Iterator; +import java.util.List; +import java.util.NoSuchElementException; + +import org.apache.commons.logging.Log; +import org.apache.commons.logging.LogFactory; + +import at.gv.egiz.bku.slexceptions.SLCommandException; +import at.gv.egiz.bku.slexceptions.SLExceptionMessages; +import at.gv.egiz.bku.slexceptions.SLRuntimeException; +import at.gv.egiz.idlink.ans1.IdentityLink; +import at.gv.egiz.stal.ErrorResponse; +import at.gv.egiz.stal.InfoboxReadResponse; +import at.gv.egiz.stal.STAL; +import at.gv.egiz.stal.STALRequest; +import at.gv.egiz.stal.STALResponse; + +/** + * A helper class for transmitting {@link STALRequest}s and obtaining their + * respective {@link STALResponse}s. + * + * @author mcentner + */ +public class STALHelper { + + /** + * Logging facility. + */ + private static Log log = LogFactory.getLog(STALHelper.class); + + /** + * The STAL implementation. + */ + private STAL stal; + + /** + * An iterator over the STALResponses received in + * {@link SLCommandImpl#transmitSTALRequest(List)}. + */ + protected Iterator stalResponses; + + /** + * Creates a new instance of this STALHelper with the given + * stal. + * + * @param stal the STAL to be used + */ + public STALHelper(STAL stal) { + if (stal == null) { + throw new NullPointerException("Argument 'stal' must not be null."); + } + this.stal = stal; + } + + /** + * Calls {@link STAL#handleRequest(List)} with the given + * stalRequests. + * + * @param stalRequests + * @throws SLCommandException + */ + public void transmitSTALRequest(List stalRequests) throws SLCommandException { + List responses = stal.handleRequest(stalRequests); + if (responses == null) { + Log log = LogFactory.getLog(this.getClass()); + log.info("Received no responses from STAL."); + throw new SLCommandException(4000); + } else if (responses.size() != stalRequests.size()) { + Log log = LogFactory.getLog(this.getClass()); + log.info("Received invalid count of responses from STAL. Expected " + + stalRequests.size() + ", but got " + responses.size() + "."); + // throw new SLCommandException(4000); + } + stalResponses = responses.iterator(); + } + + /** + * @return true if there are more {@link STALResponse}s to be + * fetched with {@link #nextResponse(Class)}, or false + * otherwise. + */ + public boolean hasNextResponse() { + return (stalResponses != null) ? stalResponses.hasNext() : false; + } + + /** + * Returns the next response of type responseClass that has been + * received by {@link #transmitSTALRequest(List)}. + * + * @param responseClass + * the response must be an instance of + * @return the next response of type responseClass + * + * @throws NoSuchElementException + * if there is no more response + * @throws SLCommandException + * if the next response is of type {@link ErrorResponse} or not of + * type responseClass + */ + public STALResponse nextResponse( + Class responseClass) throws SLCommandException { + + if (stalResponses == null) { + throw new NoSuchElementException(); + } + + STALResponse response = stalResponses.next(); + + if (response instanceof ErrorResponse) { + throw new SLCommandException(((ErrorResponse) response).getErrorCode()); + } + + if (!(responseClass.isAssignableFrom(response.getClass()))) { + Log log = LogFactory.getLog(this.getClass()); + log.info("Received " + response.getClass() + " from STAL but expected " + + responseClass); + throw new SLCommandException(4000); + } + + return response; + + } + + /** + * Gets the list of certificates from the next STAL responses. + * + * @return the list of certificates + * + * @throws SLCommandException if getting the list of certificates fails + */ + public List getCertificatesFromResponses() throws SLCommandException { + + List certificates = new ArrayList(); + + CertificateFactory certFactory; + try { + certFactory = CertificateFactory.getInstance("X509"); + } catch (CertificateException e) { + // we should always be able to get an X509 certificate factory + log.error("CertificateFactory.getInstance(\"X509\") failed.", e); + throw new SLRuntimeException(e); + } + + InfoboxReadResponse response; + while(hasNextResponse()) { + response = (InfoboxReadResponse) nextResponse(InfoboxReadResponse.class); + byte[] cert = response.getInfoboxValue(); + try { + certificates.add((X509Certificate) certFactory.generateCertificate(new ByteArrayInputStream(cert))); + } catch (CertificateException e) { + log.info("Failed to decode certificate.", e); + throw new SLCommandException(4000, + SLExceptionMessages.EC4000_UNCLASSIFIED_INFOBOX_INVALID, + new Object[] { "Certificates" }); + } + } + + return certificates; + + } + + /** + * Gets the IdentitiyLink form the next STAL response. + * + * @return the IdentityLink + * + * @throws SLCommandException if getting the IdentitiyLink fails + */ + public IdentityLink getIdentityLinkFromResponses() throws SLCommandException { + + // IdentityLink + InfoboxReadResponse response; + if (hasNextResponse()) { + response = (InfoboxReadResponse) nextResponse(InfoboxReadResponse.class); + byte[] idLink = response.getInfoboxValue(); + try { + return new IdentityLink(DerCoder.decode(idLink)); + } catch (CodingException e) { + log.info("Failed to decode infobox 'IdentityLink'.", e); + throw new SLCommandException(4000, + SLExceptionMessages.EC4000_UNCLASSIFIED_INFOBOX_INVALID, + new Object[] { "IdentityLink" }); + } + } else { + log.info("No infobox 'IdentityLink' returned from STAL."); + throw new SLCommandException(4000); + } + + } + + +} -- cgit v1.2.3