| /** |
| * 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.keyresolver.implementations; |
| |
| import java.security.PublicKey; |
| import java.security.cert.X509Certificate; |
| |
| import org.apache.xml.security.exceptions.XMLSecurityException; |
| import org.apache.xml.security.keys.content.keyvalues.DSAKeyValue; |
| import org.apache.xml.security.keys.keyresolver.KeyResolverSpi; |
| import org.apache.xml.security.keys.storage.StorageResolver; |
| import org.apache.xml.security.utils.Constants; |
| import org.apache.xml.security.utils.XMLUtils; |
| import org.w3c.dom.Element; |
| |
| public class DSAKeyValueResolver extends KeyResolverSpi { |
| |
| private static final org.slf4j.Logger LOG = |
| org.slf4j.LoggerFactory.getLogger(DSAKeyValueResolver.class); |
| |
| |
| /** |
| * Method engineResolvePublicKey |
| * |
| * @param element |
| * @param baseURI |
| * @param storage |
| * @return null if no {@link PublicKey} could be obtained |
| */ |
| public PublicKey engineLookupAndResolvePublicKey( |
| Element element, String baseURI, StorageResolver storage |
| ) { |
| if (element == null) { |
| return null; |
| } |
| Element dsaKeyElement = null; |
| boolean isKeyValue = |
| XMLUtils.elementIsInSignatureSpace(element, Constants._TAG_KEYVALUE); |
| if (isKeyValue) { |
| dsaKeyElement = |
| XMLUtils.selectDsNode(element.getFirstChild(), Constants._TAG_DSAKEYVALUE, 0); |
| } else if (XMLUtils.elementIsInSignatureSpace(element, Constants._TAG_DSAKEYVALUE)) { |
| // this trick is needed to allow the RetrievalMethodResolver to eat a |
| // ds:DSAKeyValue directly (without KeyValue) |
| dsaKeyElement = element; |
| } |
| |
| if (dsaKeyElement == null) { |
| return null; |
| } |
| |
| try { |
| DSAKeyValue dsaKeyValue = new DSAKeyValue(dsaKeyElement, baseURI); |
| PublicKey pk = dsaKeyValue.getPublicKey(); |
| |
| return pk; |
| } catch (XMLSecurityException ex) { |
| LOG.debug(ex.getMessage(), ex); |
| //do nothing |
| } |
| |
| return null; |
| } |
| |
| |
| /** {@inheritDoc} */ |
| public X509Certificate engineLookupResolveX509Certificate( |
| Element element, String baseURI, StorageResolver storage |
| ) { |
| return null; |
| } |
| |
| /** {@inheritDoc} */ |
| public javax.crypto.SecretKey engineLookupAndResolveSecretKey( |
| Element element, String baseURI, StorageResolver storage |
| ) { |
| return null; |
| } |
| } |