
org.jscep.transaction.Nonce Maven / Gradle / Ivy
/*
* Copyright (c) 2009-2010 David Grant
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package org.jscep.transaction;
import java.security.SecureRandom;
import java.util.Arrays;
import java.util.Random;
import java.util.logging.Logger;
import org.jscep.util.HexUtil;
import org.jscep.util.LoggingUtil;
/**
* This class represents the senderNonce
and recipientNonce
* types.
*
* @author David Grant
*/
public class Nonce {
private static Logger LOGGER = LoggingUtil.getLogger(Nonce.class);
private static final Random RND = new SecureRandom();
private byte[] nonce;
/**
* Creates a new nonce with the given byte array.
*
* @param nonce the byte array.
*/
public Nonce(byte[] nonce) {
this.nonce = nonce;
}
/**
* Returns the nonce byte array.
*
* @return the byte array.
*/
public byte[] getBytes() {
return nonce;
}
/**
* {@inheritDoc}
*/
@Override
public boolean equals(Object o) {
Nonce n = (Nonce) o;
return Arrays.equals(n.nonce, nonce);
}
@Override
public String toString() {
return HexUtil.toHexString(nonce);
}
/**
* Generates a new random Nonce.
*
* This method does not guarantee that multiple invocations will produce a different
* nonce, as the byte generation is provided by a SecureRandom instance.
*
* @return the generated nonce.
* @see java.security.SecureRandom
*/
public static Nonce nextNonce() {
LOGGER.entering(Nonce.class.getName(), "nextNonce");
byte[] bytes = new byte[16];
RND.nextBytes(bytes);
final Nonce nonce = new Nonce(bytes);
LOGGER.exiting(Nonce.class.getName(), "nextNonce", nonce);
return nonce;
}
}
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