/**
* 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.security.spec.AlgorithmParameterSpec;
import javax.crypto.Mac;
import org.apache.cxf.common.util.Base64Exception;
import org.apache.cxf.common.util.Base64UrlUtility;
import org.apache.cxf.rs.security.jose.jwa.AlgorithmUtils;
import org.apache.cxf.rs.security.jose.jwa.SignatureAlgorithm;
import org.apache.cxf.rt.security.crypto.HmacUtils;
public class HmacJwsSignatureProvider extends AbstractJwsSignatureProvider {
private byte[] key;
private AlgorithmParameterSpec hmacSpec;
public HmacJwsSignatureProvider(byte[] key, SignatureAlgorithm algo) {
this(key, null, algo);
}
public HmacJwsSignatureProvider(byte[] key, AlgorithmParameterSpec spec, SignatureAlgorithm algo) {
super(algo);
this.key = key;
this.hmacSpec = spec;
}
public HmacJwsSignatureProvider(String encodedKey, SignatureAlgorithm algo) {
super(algo);
try {
this.key = Base64UrlUtility.decode(encodedKey);
} catch (Base64Exception ex) {
LOG.warning("Hmac key can not be decoded");
throw new JwsException(JwsException.Error.INVALID_KEY, ex);
}
}
protected JwsSignature doCreateJwsSignature(JwsHeaders headers) {
final String sigAlgo = headers.getSignatureAlgorithm().getJwaName();
final Mac mac = HmacUtils.getInitializedMac(key,
AlgorithmUtils.toJavaName(sigAlgo),
hmacSpec);
return new JwsSignature() {
@Override
public void update(byte[] src, int off, int len) {
mac.update(src, off, len);
}
@Override
public byte[] sign() {
return mac.doFinal();
}
};
}
@Override
protected boolean isValidAlgorithmFamily(String algo) {
return AlgorithmUtils.isHmacSign(algo);
}
}