Phpseclib PHP 致命错误：未捕获错误：Class

Question

I followed the installation instructions. I created the folder and ran the composer. I got the lock file and the vendor directory. I placed the JSON, lock files, and vendor directory on the server (hosted by GoDaddy).

I created a simple PHP file with a decrypt function.

<?php
require __DIR__ . '/vendor/autoload.php';
$ky = '2345678901234567890123456789012'; // 32 * 8 = 256 bit key
$iv = '2345678901234567890123456789012'; // 32 * 8 = 256 bit iv

function Decrypt($string_to_decrypt)
{
    global $ky;
    global $iv;
    
    $cipher = new Crypt_Rijndael(CRYPT_RIJNDAEL_MODE_CBC);
    $cipher->setBlockLength(256);
    $cipher->setKeyLength(256);
    $cipher->setKey($ky);
    $cipher->setIV($iv);

    $rtn= $cipher->decrypt($string_to_decrypt);
    error_log('decrypt = '. $rtn, 0);

    return($rtn);
}

I tried putting the following include in and it got further but then complained about the BlockCipher. I put another include in for that and got further. I know this is not the correct way. I would have thought the autoloader would have taken care of this.

include('/home/n28d5aun99s6/public_html/Working/vendor/phpseclib/phpseclib/phpseclib/Crypt/Rijndael.php');

Can someone please tell me what I am doing wrong?

Answer 1

You do not have proper reference to that class. It lives in phpseclib3\Crypt namespace but your code neither imports from there using use phpseclib3\Crypt\Rijndael nor have FQN given in when referenced in new . Also the class name is Rijndael and not Crypt_Rijndael ( source ) so you should first ensure your code is working locally before uploading it anywhere otherwise you will be wasting time debugging.

Also your hardcoded include solves nothing and should be removed.

Please read the about namespaces in PHP as you seem to have knowledge deficit on that matter.