| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.xml.security.keys.storage.implementations; |
| |
| import java.security.KeyStore; |
| import java.security.KeyStoreException; |
| import java.security.cert.Certificate; |
| import java.util.Enumeration; |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| |
| import org.apache.xml.security.keys.storage.StorageResolverException; |
| import org.apache.xml.security.keys.storage.StorageResolverSpi; |
| |
| /** |
| * Makes the Certificates from a JAVA {@link KeyStore} object available to the |
| * {@link org.apache.xml.security.keys.storage.StorageResolver}. |
| */ |
| public class KeyStoreResolver extends StorageResolverSpi { |
| |
| /** Field keyStore */ |
| private KeyStore keyStore; |
| |
| /** |
| * Constructor KeyStoreResolver |
| * |
| * @param keyStore is the keystore which contains the Certificates |
| * @throws StorageResolverException |
| */ |
| public KeyStoreResolver(KeyStore keyStore) throws StorageResolverException { |
| this.keyStore = keyStore; |
| // Do a quick check on the keystore |
| try { |
| keyStore.aliases(); |
| } catch (KeyStoreException ex) { |
| throw new StorageResolverException(ex); |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| public Iterator<Certificate> getIterator() { |
| return new KeyStoreIterator(this.keyStore); |
| } |
| |
| /** |
| * Class KeyStoreIterator |
| */ |
| static class KeyStoreIterator implements Iterator<Certificate> { |
| |
| /** Field keyStore */ |
| KeyStore keyStore = null; |
| |
| /** Field aliases */ |
| Enumeration<String> aliases = null; |
| |
| /** Field nextCert */ |
| Certificate nextCert = null; |
| |
| /** |
| * Constructor KeyStoreIterator |
| * |
| * @param keyStore |
| */ |
| public KeyStoreIterator(KeyStore keyStore) { |
| try { |
| this.keyStore = keyStore; |
| this.aliases = this.keyStore.aliases(); |
| } catch (KeyStoreException ex) { |
| // empty Enumeration |
| this.aliases = new Enumeration<String>() { |
| public boolean hasMoreElements() { |
| return false; |
| } |
| public String nextElement() { |
| return null; |
| } |
| }; |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| public boolean hasNext() { |
| if (nextCert == null) { |
| nextCert = findNextCert(); |
| } |
| |
| return nextCert != null; |
| } |
| |
| /** {@inheritDoc} */ |
| public Certificate next() { |
| if (nextCert == null) { |
| // maybe caller did not call hasNext() |
| nextCert = findNextCert(); |
| |
| if (nextCert == null) { |
| throw new NoSuchElementException(); |
| } |
| } |
| |
| Certificate ret = nextCert; |
| nextCert = null; |
| return ret; |
| } |
| |
| /** |
| * Method remove |
| */ |
| public void remove() { |
| throw new UnsupportedOperationException("Can't remove keys from KeyStore"); |
| } |
| |
| // Find the next entry that contains a certificate and return it. |
| // In particular, this skips over entries containing symmetric keys. |
| private Certificate findNextCert() { |
| while (this.aliases.hasMoreElements()) { |
| String alias = this.aliases.nextElement(); |
| try { |
| Certificate cert = this.keyStore.getCertificate(alias); |
| if (cert != null) { |
| return cert; |
| } |
| } catch (KeyStoreException ex) { |
| return null; |
| } |
| } |
| |
| return null; |
| } |
| |
| } |
| |
| } |