com.googlecode.jinahya.nica.util.Hac 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 java.io.UnsupportedEncodingException;
/**
* An abstract class for HMAC-SHA-1.
*
* @author Jin Kwon
*/
public abstract class Hac {
/**
* Authenticates given {@code message}.
*
* @param message the message to authenticate
*
* @return authentication output
*/
public abstract byte[] authenticate(byte[] message);
/**
* Authenticates given {@code message}.
*
* @param message the message to authenticate
*
* @return authentication output
*/
public byte[] authenticate(final String message) {
if (message == null) {
throw new NullPointerException("message");
}
try {
return authenticate(message.getBytes("UTF-8"));
} catch (UnsupportedEncodingException uee) {
throw new RuntimeException("\"UTF-8\" is not supported?");
}
}
/**
* Authenticates given {@code message} and returns output as a HEX string.
*
* @param message the message to authenticate
*
* @return the output as a HEX string
*/
public String authenticateToString(final byte[] message) {
return Hex.encodeToString(authenticate(message));
}
/**
* Authenticates given {@code message} and returns output as a HEX string.
*
* @param message the message to authenticate
*
* @return the output as a HEX string
*/
public String authenticateToString(final String message) {
return Hex.encodeToString(authenticate(message));
}
}