screen/application/service/byte_dance/ByteDanceDecrypt.php

<?php
namespace app\service\byte_dance;

use think\Cache;

class ByteDanceDecrypt implements ByteDanceInterface {
    protected $session_key;
    protected $encryptedData;
    protected $iv;

    public function setSessionKey($sessionKey)
    {
        $this->session_key = $sessionKey;
        return $this;
    }

    /**
     * @param mixed $encryptedData
     */
    public function setEncryptedData($encryptedData): void
    {
        $this->encryptedData = $encryptedData;
    }

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

    public function get()
    {
        try {
            $decrypted=openssl_decrypt(base64_decode($this->encryptedData),'AES-128-CBC',base64_decode($this->session_key),OPENSSL_RAW_DATA,base64_decode($this->iv));
            return json_decode($decrypted,true);
        }catch (\Exception $e){
            ByteDance::throwIf(1,"数据解密失败({$e->getMessage()})");
        }
    }
}