/*
* Copyright (c) 2007-2013, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
/**
* 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 com.sun.org.apache.xml.internal.security.keys.keyresolver.implementations;
import java.security.PublicKey;
import java.security.cert.X509Certificate;
import com.sun.org.apache.xml.internal.security.exceptions.XMLSecurityException;
import com.sun.org.apache.xml.internal.security.keys.content.keyvalues.DSAKeyValue;
import com.sun.org.apache.xml.internal.security.keys.keyresolver.KeyResolverSpi;
import com.sun.org.apache.xml.internal.security.keys.storage.StorageResolver;
import com.sun.org.apache.xml.internal.security.utils.Constants;
import com.sun.org.apache.xml.internal.security.utils.XMLUtils;
import org.w3c.dom.Element;
public class DSAKeyValueResolver extends KeyResolverSpi {
/** {@link org.apache.commons.logging} logging facility */
private static java.util.logging.Logger log =
java.util.logging.Logger.getLogger(DSAKeyValueResolver.class.getName());
/**
* 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) {
if (log.isLoggable(java.util.logging.Level.FINE)) {
log.log(java.util.logging.Level.FINE, 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;
}
}