<?php
declare(strict_types=1);
namespace ParagonIE\MultiFactor;
use ParagonIE\MultiFactor\OTP\{
OTPInterface,
TOTP
};
use ParagonIE\HiddenString\HiddenString;
/**
* Class OneTime
*
* @package ParagonIE\MultiFactor
*/
class OneTime implements MultiFactorInterface
{
/**
* @var OTPInterface
*/
protected $otp;
/**
* @var HiddenString
*/
protected $secretKey;
/**
* FIDOU2F constructor.
*
* @param string|HiddenString $secretKey
* @param OTPInterface $otp
*/
public function __construct(
$secretKey = '',
OTPInterface $otp = null
) {
$this->secretKey = ($secretKey instanceof HiddenString) ? $secretKey : new HiddenString($secretKey);
if (!$otp) {
$otp = new TOTP();
}
$this->otp = $otp;
}
/**
* Generate a TOTP code for 2FA
*
* @param int $counterValue
* @return string
*/
public function generateCode(int $counterValue = 0): string
{
return $this->otp->getCode(
$this->secretKey,
$counterValue
);
}
/**
* Validate a user-provided code
*
* @param string $code
* @param int $counterValue
* @return bool
*/
public function validateCode(string $code, int $counterValue = 0): bool
{
$expected = $this->generateCode($counterValue);
return \hash_equals($code, $expected);
}
}
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