HOTP.php
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HOTP.php
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	<?php

	/**
	* Kolab HOTP implementation based on Spomky-Labs/otphp
	*
	* This basically follows the exmaple implementation from
	* https://github.com/Spomky-Labs/otphp/tree/master/examples
	*
	* @author Thomas Bruederli <bruederli@kolabsys.com>
	*
	* Copyright (C) 2015, Kolab Systems AG <contact@kolabsys.com>
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU Affero General Public License as
	* published by the Free Software Foundation, either version 3 of the
	* License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU Affero General Public License for more details.
	*
	* You should have received a copy of the GNU Affero General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*/


	namespace Kolab2FA\OTP;

	use OTPHP\HOTP as Base;

	class HOTP extends Base
	{
	use OTP;
	protected $counter = 0;

	public function setCounter($counter)
	{
	if (!is_integer($counter) \|\| $counter < 0) {
	throw new \Exception('Counter must be at least 0.');
	}
	$this->counter = $counter;

	return $this;
	}

	public function getCounter()
	{
	return $this->counter;
	}

	public function updateCounter($counter)
	{
	$this->counter = $counter;

	return $this;
	}
	}