lookyman/u2f

<?php

namespace lookyman\U2f\Server;

use Nette\Utils\Json;

class SignResponse
{

    /** @var string */
    private $keyHandle;

    /** @var string */
    private $challenge;

    /** @var string */
    private $signaturePrefix;

    /** @var string */
    private $clientData;

    /** @var string */
    private $signature;

    /** @var int */
    private $counter;

    public function __construct($keyHandle, $signatureData, $clientData)
    {
        $this->keyHandle = $keyHandle;
        $this->clientData = $clientData;
        $this->challenge = Helpers::urlSafeBase64Decode(Json::decode($clientData)->challenge);

        $this->signaturePrefix = substr($signatureData, 0, 5);
        $this->signature = substr($signatureData, 5);

        $this->counter = unpack('Nctr', substr($this->signaturePrefix, 1, 4))['ctr'];
    }

    /**
     * @return string
     */
    public function getKeyHandle()
    {
        return $this->keyHandle;
    }

    /**
     * @return string
     */
    public function getChallenge()
    {
        return $this->challenge;
    }

    /**
     * @return string
     */
    public function getSignaturePrefix()
    {
        return $this->signaturePrefix;
    }

    /**
     * @return string
     */
    public function getClientData()
    {
        return $this->clientData;
    }

    /**
     * @return string
     */
    public function getSignature()
    {
        return $this->signature;
    }

    /**
     * @return int
     */
    public function getCounter()
    {
        return $this->counter;
    }

}