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Hello Anibal,

Not only Kickstart is compatible with PHP 5.5, it is actually developed on PHP 5.5. After it's developed on the PHP 5.5 dev server I am testing it on a series of servers with PHP 5.3 and 5.4 to make sure I have not inadvertently broken compatibility with earlier PHP versions.

Knowing the JPS format layout I can tell that Kickstart reports an error as soon as it finds encrypted data in the archive. This can only mean two things:

• You have entered the wrong JPS password to extract the archive
• You do not have the mcrypt PHP extension installed and activated

Knowing that Linux Mint is based on Ubuntu and uses the same DEB packages as my Ubuntu Server for its PHP installation I am inclined to believe that your problem is the lack of the mcrypt PHP extension. Normally you can fix that with:

sudo apt-get php5-mcrypt

Remember to restart your web server (and php-fpm if you're using the PHP FastCGI Process Manager) service afterwards.

Yes, it's possible that mcrypt is installed by it lacks the necessary algorithms to encrypt (AND decrypt!) with AES-128. The algorithm in question is called rijndael. If it's not supported by your mcrypt library you cannot encrypt or decrypt JPS archives. It seems that you found the source of your problem.

Ah, makes sense! Normally the packages for additional PHP modules create an .ini file in PHP's conf.d directory (I think it's /etc/php/mod_php/conf.d, but I'm at home now without an easily accessible server to check). If they don't you do need to edit your php.ini file, like you did.