/* * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.security.provider.certpath; import java.security.InvalidAlgorithmParameterException; import java.security.cert.Certificate; import java.security.cert.CRL; import java.util.Collection; import java.util.ConcurrentModificationException; import java.util.HashSet; import java.security.cert.CertSelector; import java.security.cert.CertStore; import java.security.cert.CertStoreException; import java.security.cert.CertStoreParameters; import java.security.cert.CollectionCertStoreParameters; import java.security.cert.CRLSelector; import java.security.cert.CertStoreSpi; /** * A CertStore that retrieves Certificates and * CRLs from a Collection. *

* Before calling the {@link #engineGetCertificates engineGetCertificates} or * {@link #engineGetCRLs engineGetCRLs} methods, the * {@link #CollectionCertStore(CertStoreParameters) * CollectionCertStore(CertStoreParameters)} constructor is called to * create the CertStore and establish the * Collection from which Certificates and * CRLs will be retrieved. If the specified * Collection contains an object that is not a * Certificate or CRL, that object will be * ignored. *

* Concurrent Access *

* As described in the javadoc for CertStoreSpi, the * engineGetCertificates and engineGetCRLs methods * must be thread-safe. That is, multiple threads may concurrently * invoke these methods on a single CollectionCertStore * object (or more than one) with no ill effects. *

* This is achieved by requiring that the Collection passed to * the {@link #CollectionCertStore(CertStoreParameters) * CollectionCertStore(CertStoreParameters)} constructor (via the * CollectionCertStoreParameters object) must have fail-fast * iterators. Simultaneous modifications to the Collection can thus be * detected and certificate or CRL retrieval can be retried. The fact that * Certificates and CRLs must be thread-safe is also * essential. * * @see java.security.cert.CertStore * * @since 1.4 * @author Steve Hanna */ public class CollectionCertStore extends CertStoreSpi { private Collection coll; /** * Creates a CertStore with the specified parameters. * For this class, the parameters object must be an instance of * CollectionCertStoreParameters. The Collection * included in the CollectionCertStoreParameters object * must be thread-safe. * * @param params the algorithm parameters * @exception InvalidAlgorithmParameterException if params is not an * instance of CollectionCertStoreParameters */ public CollectionCertStore(CertStoreParameters params) throws InvalidAlgorithmParameterException { super(params); if (!(params instanceof CollectionCertStoreParameters)) throw new InvalidAlgorithmParameterException( "parameters must be CollectionCertStoreParameters"); coll = ((CollectionCertStoreParameters) params).getCollection(); } /** * Returns a Collection of Certificates that * match the specified selector. If no Certificates * match the selector, an empty Collection will be returned. * * @param selector a CertSelector used to select which * Certificates should be returned. Specify null * to return all Certificates. * @return a Collection of Certificates that * match the specified selector * @throws CertStoreException if an exception occurs */ @Override public Collection engineGetCertificates (CertSelector selector) throws CertStoreException { if (coll == null) { throw new CertStoreException("Collection is null"); } // Tolerate a few ConcurrentModificationExceptions for (int c = 0; c < 10; c++) { try { HashSet result = new HashSet<>(); if (selector != null) { for (Object o : coll) { if ((o instanceof Certificate) && selector.match((Certificate) o)) result.add((Certificate)o); } } else { for (Object o : coll) { if (o instanceof Certificate) result.add((Certificate)o); } } return(result); } catch (ConcurrentModificationException e) { } } throw new ConcurrentModificationException("Too many " + "ConcurrentModificationExceptions"); } /** * Returns a Collection of CRLs that * match the specified selector. If no CRLs * match the selector, an empty Collection will be returned. * * @param selector a CRLSelector used to select which * CRLs should be returned. Specify null * to return all CRLs. * @return a Collection of CRLs that * match the specified selector * @throws CertStoreException if an exception occurs */ @Override public Collection engineGetCRLs(CRLSelector selector) throws CertStoreException { if (coll == null) throw new CertStoreException("Collection is null"); // Tolerate a few ConcurrentModificationExceptions for (int c = 0; c < 10; c++) { try { HashSet result = new HashSet<>(); if (selector != null) { for (Object o : coll) { if ((o instanceof CRL) && selector.match((CRL) o)) result.add((CRL)o); } } else { for (Object o : coll) { if (o instanceof CRL) result.add((CRL)o); } } return result; } catch (ConcurrentModificationException e) { } } throw new ConcurrentModificationException("Too many " + "ConcurrentModificationExceptions"); } }