openssl_csr_sign() cannot get CSR from parameter 1

If you get the following error:

openssl_csr_sign() cannot get CSR from parameter 1

... it's because the path to the openssl.cnf is wrong.

In OpenSSL.php, change the "config" value in the public declaration of Crypt_OpenSSL::$sslConfig

i.e.

public $sslConfig = array(
...
"config" => "/etc/pki/tls/openssl.cnf" // <-- point this to YOUR openssl.cnf
);