/**
* 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.jwe;
import java.security.interfaces.ECPrivateKey;
import org.apache.cxf.rs.security.jose.common.JoseUtils;
import org.apache.cxf.rs.security.jose.jwa.ContentAlgorithm;
import org.apache.cxf.rs.security.jose.jwk.JsonWebKey;
import org.apache.cxf.rs.security.jose.jwk.JwkUtils;
public class EcdhDirectKeyJweDecryption extends JweDecryption {
public EcdhDirectKeyJweDecryption(ECPrivateKey privateKey, ContentAlgorithm supportedCtAlgo) {
super(new EcdhDirectKeyDecryptionAlgorithm(privateKey),
new AesGcmContentDecryptionAlgorithm(supportedCtAlgo));
}
protected static byte[] getDecryptedContentEncryptionKeyFromHeaders(JweHeaders headers,
ECPrivateKey privateKey) {
ContentAlgorithm jwtAlgo = headers.getContentEncryptionAlgorithm();
JsonWebKey publicJwk = headers.getJsonWebKey("epk");
String apuHeader = (String)headers.getHeader("apu");
byte[] apuBytes = apuHeader == null ? null : JoseUtils.decode(apuHeader);
String apvHeader = (String)headers.getHeader("apv");
byte[] apvBytes = apvHeader == null ? null : JoseUtils.decode(apvHeader);
return JweUtils.getECDHKey(privateKey, JwkUtils.toECPublicKey(publicJwk),
apuBytes, apvBytes, jwtAlgo.getJwaName(), jwtAlgo.getKeySizeBits());
}
protected static class EcdhDirectKeyDecryptionAlgorithm extends DirectKeyDecryptionAlgorithm {
private ECPrivateKey privateKey;
public EcdhDirectKeyDecryptionAlgorithm(ECPrivateKey privateKey) {
super((byte[])null);
this.privateKey = privateKey;
}
@Override
public byte[] getDecryptedContentEncryptionKey(JweDecryptionInput jweDecryptionInput) {
super.validateKeyEncryptionKey(jweDecryptionInput);
return getDecryptedContentEncryptionKeyFromHeaders(jweDecryptionInput.getJweHeaders(), privateKey);
}
}
}