/*
* Licensed to Jasig under one or more contributor license
* agreements. See the NOTICE file distributed with this work
* for additional information regarding copyright ownership.
* Jasig 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 the following location:
*
* 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.jasig.cas.util;
import java.io.InputStream;
import java.security.KeyFactory;
import java.security.PublicKey;
import java.security.spec.X509EncodedKeySpec;
import org.springframework.beans.factory.config.AbstractFactoryBean;
import org.springframework.core.io.Resource;
import javax.validation.constraints.NotNull;
/**
* FactoryBean for creating a public key from a file.
*
* @author Scott Battaglia
* @since 3.1
*/
public class PublicKeyFactoryBean extends AbstractFactoryBean {
@NotNull
private Resource resource;
@NotNull
private String algorithm;
protected final Object createInstance() throws Exception {
final InputStream pubKey = this.resource.getInputStream();
try {
final byte[] bytes = new byte[pubKey.available()];
pubKey.read(bytes);
final X509EncodedKeySpec pubSpec = new X509EncodedKeySpec(bytes);
final KeyFactory factory = KeyFactory.getInstance(this.algorithm);
return factory.generatePublic(pubSpec);
} finally {
pubKey.close();
}
}
public Class getObjectType() {
return PublicKey.class;
}
public void setLocation(final Resource resource) {
this.resource = resource;
}
public void setAlgorithm(final String algorithm) {
this.algorithm = algorithm;
}
}