Question

I have found an script that will randomly generate numbers/letters for an X amount.
It works fine on my localhost however when I upload the script to my VPS it does not work.

I get following error:

Fatal error:  Call to undefined function  openssl_random_pseudo_bytes()

That would be this part of code:

function crypto_rand_secure($min, $max) {
        $range = $max - $min;
        if ($range < 0) return $min; // not so random...
        $log = log($range, 2);
        $bytes = (int) ($log / 8) + 1; // length in bytes
        $bits = (int) $log + 1; // length in bits
        $filter = (int) (1 << $bits) - 1; // set all lower bits to 1
        do {
            $rnd = hexdec(bin2hex(openssl_random_pseudo_bytes($bytes)));
            $rnd = $rnd & $filter; // discard irrelevant bits
        } while ($rnd >= $range);
        return $min + $rnd;
}

I have found an post on stacksoverflow with the same issue. However it required an module installed. I am not sure how do I do this, but i have found this on my WHM of VPS.

Home »Software »Module Installers

When I choose Perl Module and search for openssl, I get many results.
I have installed one of these, and I had installed one by default.

Here are installed openssl modules:

Crypt::OpenSSL::RSA

Crypt::OpenSSL::Random

Still… I get the same error on my website.
Any solution? Thanks in advance.

Answer 1

The OpenSSL Perl modules you found are a red herring. They have no effect whatsoever on PHP. (PHP and Perl are two entirely separate programming languages.)

What you need to install is the openssl PHP module. I don’t recall exactly whether cPanel has an option to rebuild PHP, but if I’m right and it does, you’ll need to go through that process and enable OpenSSL there.