<?php
/**
 * 图像加密解密.
 * @auth nj911<nj-x@gmail.com>
 * @date: 2021-04-18 15:36
 */
namespace App\Repositories\Utils;

use File;

class ImageCryptRepository
{
    /**
     * AES密钥，所有项目都代码里写死.
     * @var string
     */
    protected $secret = 'OlL7iiVrC23VWioD';

    /**
     * 算法.写死，不可变.
     * @var string
     */
    protected $cipher = 'AES-128-ECB';

    /**
     * 向量.
     * @var string
     */
    protected $iv = '';

    /**
     * 标记.
     * @var int
     */
    protected $option = OPENSSL_RAW_DATA;

    /**
     * 加密字节数据.
     * @param $raw
     * @param $toPath
     * @return bool|int
     */
    public function encodeRaw($raw)
    {
        return aes_encrypt($raw, $this->secret, $this->iv, $this->cipher, $this->option);
    }

    /**
     * 解密字节数据
     * @param $raw
     * @return string
     */
    public function decodeRaw($raw)
    {
        return aes_decrypt($raw, $this->secret, $this->iv, $this->cipher, $this->option);
    }

    /**
     * 加密并保存.
     * @param $raw
     * @param $toPath
     * @return bool|int
     */
    public function encode($raw, $toPath)
    {
        if (File::exists($toPath)) {
            File::delete($toPath);
        }
        return File::put($toPath, $this->encodeRaw($raw));
    }

    /**
     * 解密并保存.
     * @param $raw
     * @param $toPath
     * @return bool|int
     */
    public function decode($raw, $toPath)
    {
        if (File::exists($toPath)) {
            File::delete($toPath);
        }
        return File::put($toPath, $this->decodeRaw($raw));
    }
}