OpenSSL req won't work on PHP Shell - php

Question

I've been searching for the solution of my problem which is about OpenSSL. I'm using shell_exec() to run shell promts. For example:
shell_exec("openssl genrsa -out myprvkey.pem 1024"); works fine, and generates myprvkey.pem.
However,
shell_exec("openssl req -new -key myprvkey.pem -x509 -days 365 -out mypubcert.pem"); isn't working without giving any errors.
Am I doing something wrong? Thanks. PS: Please remind me if I'm missing something.
OpenSSL Version: 268439647

Answer 1

Looks like you're trying to create a CSR? If so you can do so using phpseclib, a pure PHP CSR implementation, pretty easily. Here's an example that creates a new RSA key and a new CSR:
<?php
include('File/X509.php');
include('Crypt/RSA.php');
$privKey = new Crypt_RSA();
extract($privKey->createKey());
$privKey->loadKey($privatekey);
$x509 = new File_X509();
$x509->setPrivateKey($privKey);
$x509->setDNProp('id-at-organizationName', 'phpseclib demo cert');
$csr = $x509->signCSR();
echo $x509->saveCSR($csr);
?>
Here's an example that creates a new CSR utilizing an existing RSA key:
<?php
include('File/X509.php');
include('Crypt/RSA.php');
$privKey = new Crypt_RSA();
$privKey->loadKey('...');
$x509 = new File_X509();
$x509->setPrivateKey($privKey);
$x509->setDNProp('id-at-organizationName', 'phpseclib demo cert');
$csr = $x509->signCSR();
echo $x509->saveCSR($csr);
?>
(the only diff is that loadKey is being passed a string [which could be populated via file_get_contents or just directly inputted] instead of the output of extract($rsa->createKey()))