/**
* 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.cxf.rs.security.oauth2.jws;
import java.util.Set;
import org.apache.cxf.rs.security.oauth2.jwt.JwtHeaders;
public abstract class AbstractJwsSignatureProvider implements JwsSignatureProvider {
private Set<String> supportedAlgorithms;
private String defaultJwtAlgorithm;
protected AbstractJwsSignatureProvider(Set<String> supportedAlgorithms) {
this.supportedAlgorithms = supportedAlgorithms;
}
protected JwtHeaders prepareHeaders(JwtHeaders headers) {
if (headers == null) {
headers = new JwtHeaders();
}
String algo = headers.getAlgorithm();
if (algo != null) {
checkAlgorithm(algo);
} else {
headers.setAlgorithm(defaultJwtAlgorithm);
}
return headers;
}
@Override
public JwsSignature createJwsSignature(JwtHeaders headers) {
return doCreateJwsSignature(prepareHeaders(headers));
}
protected abstract JwsSignature doCreateJwsSignature(JwtHeaders headers);
public void setDefaultJwtAlgorithm(String algo) {
this.defaultJwtAlgorithm = algo;
}
protected void checkAlgorithm(String algo) {
if (algo == null || !supportedAlgorithms.contains(algo)) {
throw new SecurityException();
}
}
}