Maztech\PseudoRandomString\McryptPseudoRandomStringGenerator

Complexity

Total Complexity

4

Size/Duplication

Total Lines	39
Duplicated Lines	0 %

Importance

Changes

0

2 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	6	2
A	getPseudoRandomString()	0	14	2

<?php

namespace Maztech\PseudoRandomString;

use Maztech\Exceptions\InstagramSDKException;

class McryptPseudoRandomStringGenerator implements PseudoRandomStringGeneratorInterface
{
    use PseudoRandomStringGeneratorTrait;

    /**
     * @const string The error message when generating the string fails.
     */
    const ERROR_MESSAGE = 'Unable to generate a cryptographically secure pseudo-random string from mcrypt_create_iv(). ';

    /**
     * @throws InstagramSDKException
     */
    public function __construct()
    {
        if (!function_exists('mcrypt_create_iv')) {
            throw new InstagramSDKException(
                static::ERROR_MESSAGE .
                'The function mcrypt_create_iv() does not exist.'
            );
        }
    }

    /**
     * @inheritdoc
     */
    public function getPseudoRandomString($length)
    {
        $this->validateLength($length);

        $binaryString = mcrypt_create_iv($length, MCRYPT_DEV_URANDOM);

        if ($binaryString === false) {
            throw new InstagramSDKException(
                static::ERROR_MESSAGE .
                'mcrypt_create_iv() returned an error.'
            );
        }

        return $this->binToHex($binaryString, $length);
    }
}