encryp_decrypt.php

encryp_decrypt.php

    <?php
    class ShopRunnerCrypt {
      
        protected $config;
        
        public function __construct(array $parameters = []) {
          $this->config = $parameters;
        }
        
        /**
         * Decrypt CC Number from PayRunner payload
         *
         * @param  string
         * @return string
         */
        protected function decryptEncryptedCc($ccNumber)
        {
            return $this->config->isApiUseEncryption() ? $this->decrypt($ccNumber) : $ccNumber;
        }
    
        /**
         * Decrypt encrypted credit card number.
         *
         * @param  string
         * @return string
         */
        protected function decrypt($encryptedCcNumber)
        {
            /** @var string */
            $decryptedCcNumber = mcrypt_decrypt(
                MCRYPT_RIJNDAEL_128,
                base64_decode($this->config->getApiDecryptionKey()),  //Get SR Key
                base64_decode($encryptedCcNumber),
                MCRYPT_MODE_CBC,
                $this->config->getApiDecryptionSeed()
            );
            return $this->cleanRawCCNumber($decryptedCcNumber);
        }
    
        /**
         * Clean the decrypted CC Number.
         *
         * @param  string
         * @return string
         */
        protected function cleanRawCCNumber($ccNumber)
        {
            $number = '';
            for ($i = 0; $i < strlen($ccNumber); $i++) {
                $digit = $ccNumber[$i];
                if (!is_numeric($digit)) {
                    break;
                }
                $number .= $digit;
            }
            return $number;
        }
    }
    ?>