RSA and PHP

Hi,

I am trying to encrypt a string on PHP using RSA which should then be decrypted by Ruby on Rails. In PHP, I am using the following commands:

$fp = fopen(...); $pKey = fread($fp, filesize(...)); openssl_public_encrypt($data, $enc, $pKey); return base64_encode($enc);

On Ruby on Rails, I get the following error: "padding check failed"

I already tried all padding configurations possible in PHP without success.

Has anyone managed to exchange RSA strings between PHP and Ruby?

Cheers, joana