openssl_private_encrypt() returns false with output of 0

Question

I am trying to use the PHP function openssl_private_encrypt() to encrypt an uploaded file prior to saving it (see code snippet below), however it\'s bool is returning false and

Answer 1

You should proper initialize private key (http://pl1.php.net/manual/en/function.openssl-pkey-get-private.php)

$key = openssl_pkey_get_private ('file://path/to/file.pem');
$data = file_get_contents($_FILES['files']['tmp_name'][0]);

openssl_private_encrypt($data,$encrypted,$key);

$hash = sha1($encrypted);
file_put_contents('/path/to/folder/'.$hash,$encrypted);