| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Copyright 1999-2004 The Apache Software Foundation. |
| * |
| * 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 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; |
| |
| |
| /** |
| * |
| * @author $Author: raul $ |
| */ |
| public class DSAKeyValueResolver extends KeyResolverSpi { |
| |
| /** Field _dsaKeyElement */ |
| private Element _dsaKeyElement = null; |
| |
| /** @inheritDoc */ |
| public boolean engineCanResolve(Element element, String BaseURI, |
| StorageResolver storage) { |
| |
| if (element == null) { |
| return false; |
| } |
| |
| boolean isKeyValue = XMLUtils.elementIsInSignatureSpace(element, |
| Constants._TAG_KEYVALUE); |
| boolean isDSAKeyValue = XMLUtils.elementIsInSignatureSpace(element, |
| Constants._TAG_DSAKEYVALUE); |
| |
| if (isKeyValue) { |
| |
| this._dsaKeyElement = |
| XMLUtils.selectDsNode(element.getFirstChild(),Constants._TAG_DSAKEYVALUE,0); |
| |
| if (this._dsaKeyElement != null) { |
| return true; |
| } |
| } else if (isDSAKeyValue) { |
| |
| // this trick is needed to allow the RetrievalMethodResolver to eat a |
| // ds:DSAKeyValue directly (without KeyValue) |
| this._dsaKeyElement = element; |
| |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Method engineResolvePublicKey |
| * |
| * @param element |
| * @param BaseURI |
| * @param storage |
| * @return null if no {@link PublicKey} could be obtained |
| */ |
| public PublicKey engineResolvePublicKey( |
| Element element, String BaseURI, StorageResolver storage) { |
| |
| if (this._dsaKeyElement == null) { |
| boolean weCanResolve = this.engineCanResolve(element, BaseURI, |
| storage); |
| |
| if (!weCanResolve || (this._dsaKeyElement == null)) { |
| return null; |
| } |
| } |
| |
| try { |
| DSAKeyValue dsaKeyValue = new DSAKeyValue(this._dsaKeyElement, |
| BaseURI); |
| PublicKey pk = dsaKeyValue.getPublicKey(); |
| |
| return pk; |
| } catch (XMLSecurityException ex) { |
| //do nothing |
| } |
| |
| return null; |
| } |
| |
| |
| /** @inheritDoc */ |
| public X509Certificate engineResolveX509Certificate( |
| Element element, String BaseURI, StorageResolver storage) { |
| return null; |
| } |
| |
| /** @inheritDoc */ |
| public javax.crypto.SecretKey engineResolveSecretKey( |
| Element element, String BaseURI, StorageResolver storage){ |
| return null; |
| } |
| } |