/**
* 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.jose.jws;
import java.util.logging.Logger;
import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.rs.security.jose.jwa.SignatureAlgorithm;
public abstract class AbstractJwsSignatureProvider implements JwsSignatureProvider {
protected static final Logger LOG = LogUtils.getL7dLogger(AbstractJwsSignatureProvider.class);
private SignatureAlgorithm algorithm;
protected AbstractJwsSignatureProvider(SignatureAlgorithm algo) {
this.algorithm = algo;
}
protected JwsHeaders prepareHeaders(JwsHeaders headers) {
if (headers == null) {
headers = new JwsHeaders();
}
SignatureAlgorithm sigAlgo = headers.getSignatureAlgorithm();
if (sigAlgo != null) {
checkAlgorithm(sigAlgo.getJwaName());
} else {
checkAlgorithm(algorithm.getJwaName());
headers.setSignatureAlgorithm(algorithm);
}
return headers;
}
@Override
public SignatureAlgorithm getAlgorithm() {
return algorithm;
}
@Override
public byte[] sign(JwsHeaders headers, byte[] content) {
JwsSignature sig = createJwsSignature(headers);
sig.update(content, 0, content.length);
return sig.sign();
}
@Override
public JwsSignature createJwsSignature(JwsHeaders headers) {
return doCreateJwsSignature(prepareHeaders(headers));
}
protected abstract JwsSignature doCreateJwsSignature(JwsHeaders headers);
protected void checkAlgorithm(String algo) {
if (algo == null) {
LOG.warning("Signature algorithm is not set");
throw new JwsException(JwsException.Error.ALGORITHM_NOT_SET);
}
if (!isValidAlgorithmFamily(algo)) {
LOG.warning("Invalid signature algorithm: " + algo);
throw new JwsException(JwsException.Error.INVALID_ALGORITHM);
}
}
protected abstract boolean isValidAlgorithmFamily(String algo);
}