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Apache XML Security for Java supports XML-Signature Syntax and Processing,
W3C Recommendation 12 February 2002, and XML Encryption Syntax and
Processing, W3C Recommendation 10 December 2002. As of version 1.4,
the library supports the standard Java API JSR-105: XML Digital Signature APIs.
/**
* 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
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
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package org.apache.xml.security.stax.impl.securityToken;
import org.apache.xml.security.binding.xmldsig.DSAKeyValueType;
import org.apache.xml.security.exceptions.XMLSecurityException;
import org.apache.xml.security.stax.ext.InboundSecurityContext;
import org.apache.xml.security.stax.impl.util.IDGenerator;
import org.apache.xml.security.stax.securityToken.SecurityTokenConstants;
import java.math.BigInteger;
import java.security.KeyFactory;
import java.security.NoSuchAlgorithmException;
import java.security.PublicKey;
import java.security.spec.DSAPublicKeySpec;
import java.security.spec.InvalidKeySpecException;
/**
* @author $Author: coheigea $
* @version $Revision: 1354898 $ $Date: 2012-06-28 11:19:02 +0100 (Thu, 28 Jun 2012) $
*/
public class DsaKeyValueSecurityToken extends AbstractInboundSecurityToken {
private DSAKeyValueType dsaKeyValueType;
public DsaKeyValueSecurityToken(DSAKeyValueType dsaKeyValueType, InboundSecurityContext inboundSecurityContext) {
super(inboundSecurityContext, IDGenerator.generateID(null), SecurityTokenConstants.KeyIdentifier_KeyValue, true);
this.dsaKeyValueType = dsaKeyValueType;
}
private PublicKey buildPublicKey(DSAKeyValueType dsaKeyValueType) throws InvalidKeySpecException, NoSuchAlgorithmException {
DSAPublicKeySpec dsaPublicKeySpec = new DSAPublicKeySpec(
new BigInteger(1, dsaKeyValueType.getY()),
new BigInteger(1, dsaKeyValueType.getP()),
new BigInteger(1, dsaKeyValueType.getQ()),
new BigInteger(1, dsaKeyValueType.getG()));
KeyFactory keyFactory = KeyFactory.getInstance("DSA");
return keyFactory.generatePublic(dsaPublicKeySpec);
}
@Override
public PublicKey getPublicKey() throws XMLSecurityException {
if (super.getPublicKey() == null) {
try {
setPublicKey(buildPublicKey(this.dsaKeyValueType));
} catch (InvalidKeySpecException e) {
throw new XMLSecurityException(e);
} catch (NoSuchAlgorithmException e) {
throw new XMLSecurityException(e);
}
}
return super.getPublicKey();
}
@Override
public boolean isAsymmetric() {
return true;
}
@Override
public SecurityTokenConstants.TokenType getTokenType() {
return SecurityTokenConstants.KeyValueToken;
}
}