// Copyright (c) 2017 The Authors of 'JWTS for Java'

//

// 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 com.auth0.jwt;

import java.util.Date;

import java.util.GregorianCalendar;

import java.util.Random;

public class TimeUtil {

public static Date generateRandomExpDateInFuture() {

Random rnd = new Random();

return new Date(Math.abs(System.currentTimeMillis() + rnd.nextLong()));

}

public static Date generateRandomIatDateInPast() {

GregorianCalendar gc = new GregorianCalendar();

int year = randBetween(1900, 2010);

gc.set(gc.YEAR, year);

int dayOfYear = randBetween(1, gc.getActualMaximum(gc.DAY_OF_YEAR));

gc.set(gc.DAY_OF_YEAR, dayOfYear);

return new Date(gc.getTimeInMillis());

}

public static int randBetween(int start, int end) {

return start + (int)Math.round(Math.random() * (end - start));

}

}