为什么AES解密代码在php 7.2中不起作用

Question

我使用AES来加密从java发送到服务器的发布参数。所以我在我的服务器中使用下面的类来解密后参数。

<?php

class MCrypt {

private $hex_iv = '31323334353637383930616263646566'; # converted Java byte code in to HEX and placed it here               

private $key = '0FDOUZ.Qz'; #Same as in JAVA

function __construct() {

    $this->key = hash('sha256', $this->key, true);

    //echo $this->key.'<br/>';

}

function encrypt($str) {       

    $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');

    mcrypt_generic_init($td, $this->key, $this->hexToStr($this->hex_iv));

    $block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);

    $pad = $block - (strlen($str) % $block);

    $str .= str_repeat(chr($pad), $pad);

    $encrypted = mcrypt_generic($td, $str);

    mcrypt_generic_deinit($td);

    mcrypt_module_close($td);        

    return base64_encode($encrypted);

}

function decrypt($code) {        

    $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');

    mcrypt_generic_init($td, $this->key, $this->hexToStr($this->hex_iv));

    $str = mdecrypt_generic($td, base64_decode($code));

    $block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);

    mcrypt_generic_deinit($td);

    mcrypt_module_close($td);        

    return $this->strippadding($str);      

}

/*

  For PKCS7 padding

 */

private function addpadding($string, $blocksize = 16) {

    $len = strlen($string);

    $pad = $blocksize - ($len % $blocksize);

    $string .= str_repeat(chr($pad), $pad);

    return $string;

}

private function strippadding($string) {

    $slast = ord(substr($string, -1));

    $slastc = chr($slast);

    $pcheck = substr($string, -$slast);

    if (preg_match("/$slastc{" . $slast . "}/", $string)) {

        $string = substr($string, 0, strlen($string) - $slast);

        return $string;

    } else {

        return false;

    }

}

在将php更新到php7.2之前，我的代码工作正常。但是现在当我更新php时，解密方法出错。所以我如何解决它？

Answer 1

我对爪哇和菲律宾比索都使用了开放。它现在工作正常。