Error validation the encoded script - php

Question

I'm trying this
<?php
/* read the PHP source code */
$source_code = file_get_contents("hello.php");
$source_code = preg_replace('#^<\?php\s+#', '', $source_code);
$source_code = preg_replace('#\s+\?>\s*$#', '', $source_code);
/* create the encrypted version */
$redistributable_key = blenc_encrypt($source_code, "encrypt.php", "my_fixed_password");
$key_file = __DIR__ ."\keys";
file_put_contents($key_file, $redistributable_key . "\n", FILE_APPEND);
include 'encrypt.php';
echo $hello;
?>
hello.php
<?php
$hello = "Ciao";
I got this error
PHP Fatal error: blenc_compile: Validation of script
'encrypt.php' failed, cannot execute.
Please note that:
The key file is created, I'm already using the '\n' fix
I replaced <?php and ?> because another Stack Overflow question told me that it's a problem

Answer 1

<?php
$file_name = basename($file);
$unencrypted_key = = md5(time());
$source_code = file_get_contents($file);
//This covers old-asp tags, php short-tags, php echo tags, and normal php tags.
$contents = preg_replace(array('/^<(\?|\%)\=?(php)?/', '/(\%|\?)>$/'), array('',''), $source_code);
$html .= "<br> BLENC blowfish unencrypted key: $unencrypted_key" . PHP_EOL;
$html .= "<br> BLENC file to encode: " . $file_name . PHP_EOL;
//file_put_contents('blencode-log', "---\nFILE: $file_name\nSIZE: ".strlen($contents)."\nMD5: ".md5($contents)."\n", FILE_APPEND);
$redistributable_key = blenc_encrypt($contents, TARGET_DIR . '/blenc/' . $file_name, $unencrypted_key);
$html .= "<br> BLENC size of content: " . strlen($contents) . PHP_EOL;
/**
* Server key
* key_file.blenc
*/
file_put_contents(TARGET_DIR . '/blenc/' . 'key_file.blenc', $redistributable_key . PHP_EOL);
$html .= "<br> BLENC redistributable key file key_file.blenc updated." . PHP_EOL;
exec("cat key_file.blenc >> /usr/local/etc/blenckeys");
?>
https://github.com/codex-corp/ncryptd/blob/master/app/controllers/MagicalController.php#L479
you should put the key to
blenckeys
file on your server
Note: Sometimes you need to reload the apache, if you have "Validation of script" issues
How to use BLENC in PHP?