| /** |
| * 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.content.keyvalues; |
| |
| import java.math.BigInteger; |
| import java.security.Key; |
| import java.security.KeyFactory; |
| import java.security.NoSuchAlgorithmException; |
| import java.security.PublicKey; |
| import java.security.interfaces.DSAParams; |
| import java.security.interfaces.DSAPublicKey; |
| import java.security.spec.DSAPublicKeySpec; |
| import java.security.spec.InvalidKeySpecException; |
| |
| import org.apache.xml.security.exceptions.XMLSecurityException; |
| import org.apache.xml.security.utils.Constants; |
| import org.apache.xml.security.utils.I18n; |
| import org.apache.xml.security.utils.SignatureElementProxy; |
| import org.w3c.dom.Document; |
| import org.w3c.dom.Element; |
| |
| public class DSAKeyValue extends SignatureElementProxy implements KeyValueContent { |
| |
| /** |
| * Constructor DSAKeyValue |
| * |
| * @param element |
| * @param baseURI |
| * @throws XMLSecurityException |
| */ |
| public DSAKeyValue(Element element, String baseURI) throws XMLSecurityException { |
| super(element, baseURI); |
| } |
| |
| /** |
| * Constructor DSAKeyValue |
| * |
| * @param doc |
| * @param P |
| * @param Q |
| * @param G |
| * @param Y |
| */ |
| public DSAKeyValue(Document doc, BigInteger P, BigInteger Q, BigInteger G, BigInteger Y) { |
| super(doc); |
| |
| addReturnToSelf(); |
| this.addBigIntegerElement(P, Constants._TAG_P); |
| this.addBigIntegerElement(Q, Constants._TAG_Q); |
| this.addBigIntegerElement(G, Constants._TAG_G); |
| this.addBigIntegerElement(Y, Constants._TAG_Y); |
| } |
| |
| /** |
| * Constructor DSAKeyValue |
| * |
| * @param doc |
| * @param key |
| * @throws IllegalArgumentException |
| */ |
| public DSAKeyValue(Document doc, Key key) throws IllegalArgumentException { |
| super(doc); |
| |
| addReturnToSelf(); |
| |
| if (key instanceof DSAPublicKey) { |
| DSAParams params = ((DSAPublicKey) key).getParams(); |
| this.addBigIntegerElement(params.getP(), Constants._TAG_P); |
| this.addBigIntegerElement(params.getQ(), Constants._TAG_Q); |
| this.addBigIntegerElement(params.getG(), Constants._TAG_G); |
| this.addBigIntegerElement(((DSAPublicKey) key).getY(), Constants._TAG_Y); |
| } else { |
| Object[] exArgs = { Constants._TAG_DSAKEYVALUE, key.getClass().getName() }; |
| |
| throw new IllegalArgumentException(I18n.translate("KeyValue.IllegalArgument", exArgs)); |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| public PublicKey getPublicKey() throws XMLSecurityException { |
| try { |
| DSAPublicKeySpec pkspec = |
| new DSAPublicKeySpec( |
| this.getBigIntegerFromChildElement( |
| Constants._TAG_Y, Constants.SignatureSpecNS |
| ), |
| this.getBigIntegerFromChildElement( |
| Constants._TAG_P, Constants.SignatureSpecNS |
| ), |
| this.getBigIntegerFromChildElement( |
| Constants._TAG_Q, Constants.SignatureSpecNS |
| ), |
| this.getBigIntegerFromChildElement( |
| Constants._TAG_G, Constants.SignatureSpecNS |
| ) |
| ); |
| KeyFactory dsaFactory = KeyFactory.getInstance("DSA"); |
| PublicKey pk = dsaFactory.generatePublic(pkspec); |
| |
| return pk; |
| } catch (NoSuchAlgorithmException ex) { |
| throw new XMLSecurityException(ex); |
| } catch (InvalidKeySpecException ex) { |
| throw new XMLSecurityException(ex); |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| public String getBaseLocalName() { |
| return Constants._TAG_DSAKEYVALUE; |
| } |
| } |