com.googlecode.jinahya.nica.util.HacBC Maven / Gradle / Ivy
/*
* Copyright 2012 Jin Kwon .
*
* Licensed 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 com.googlecode.jinahya.nica.util;
import org.bouncycastle.crypto.digests.SHA1Digest;
import org.bouncycastle.crypto.macs.HMac;
import org.bouncycastle.crypto.params.KeyParameter;
/**
*
* @author Jin Kwon
*/
public class HacBC extends Hac {
/**
* Creates a new instance.
*
* @param key encryption key
*/
public HacBC(final byte[] key) {
super();
if (key == null) {
throw new NullPointerException("key");
}
if (key.length != Aes.KEY_SIZE_IN_BYTES) {
throw new IllegalArgumentException(
"key.length(" + key.length + ") != " + Aes.KEY_SIZE_IN_BYTES);
}
mac = new HMac(new SHA1Digest());
mac.init(new KeyParameter(key));
}
//@Override // commented for pre5
public byte[] authenticate(final byte[] message) {
if (message == null) {
throw new NullPointerException("message");
}
final byte[] output = new byte[mac.getMacSize()];
mac.reset();
mac.update(message, 0, message.length);
mac.doFinal(output, 0);
return output;
}
/**
* mac.
*/
private final HMac mac;
}