IMMREX7

<?php

namespace App\Http;

use \App\Http\RequestValidate;
use \App\Http\AES;

/**
 * Version 1.0
 */
class TransactionResponseBean {

    protected $responsePayload = "";
    protected $key;
    protected $iv;
    protected $logPath = "";
    protected $blocksize = 128;
    protected $mode = "cbc";

    /**
     * @return the $key
     */
    public function getKey() {
        return $this->key;
    }

    /**
     * @return the $iv
     */
    public function getIv() {
        return $this->iv;
    }

    /**
     * @return the $logPath
     */
    public function getLogPath() {
        return $this->logPath;
    }

    /**
     * @return the $blocksize
     */
    public function getBlocksize() {
        return $this->blocksize;
    }

    /**
     * @return the $mode
     */
    public function getMode() {
        return $this->mode;
    }

    /**
     * @param number $responsePayload
     */
    public function setResponsePayload($responsePayload) {
        $this->responsePayload = $responsePayload;
    }

    /**
     * @param number $key
     */
    public function setKey($key) {
        $this->key = $key;
    }

    /**
     * @param long $iv
     */
    public function setIv($iv) {
        $this->iv = $iv;
    }

    /**
     * @param string $logPath
     */
    public function setLogPath($logPath) {
        $this->logPath = $logPath;
    }

    /**
     * @param number $blocksize
     */
    public function setBlocksize($blocksize) {
        $this->blocksize = $blocksize;
    }

    /**
     * @param string $mode
     */
    public function setMode($mode) {
        $this->mode = $mode;
    }

    /**
     * This function decrypts the final response and returns it to the merchant.
     * @return string $decryptResponse
     */
    public function getResponsePayload() {
        try {
            $responseParams = array(
                'pRes' => $this->responsePayload,
                'pEncKey' => $this->key,
                'pEncIv' => $this->iv
            );

            $requestValidateObj = new RequestValidate();
            $errorResponse = $requestValidateObj->validateResponseParam($responseParams);

            if ($errorResponse) {
                return $errorResponse;
            }

            $aesObj = new AES($this->responsePayload, $this->key, $this->blocksize, $this->mode, $this->iv);
            $aesObj->require_pkcs5();
            $decryptResponse = trim(preg_replace('/[\x00-\x1F\x7F]/', '', $aesObj->decrypt()));

            $implodedResp = explode("|", $decryptResponse);
            $hashCodeString = end($implodedResp);
            array_pop($implodedResp);

            $explodedHashValue = explode("=", $hashCodeString);
            $hashValue = trim($explodedHashValue[1]);

            $responseDataString = implode("|", $implodedResp);
            $generatedHash = sha1($responseDataString);

            if ($generatedHash == $hashValue) {
                return $decryptResponse;
            } else {
                return 'ERROR064';
            }
        } catch (Exception $ex) {
            echo "Exception In TransactionResposeBean :" . $ex->getMessage();
            return;
        }

        return "ERROR037";
    }

}