AES256 for PHP v1.0 MrJack

<?php
	/*
		AES256 v1.0 MrJack
		https://gist.github.com/1077723/0a9a7c5299a7fb4340e4b2064fd383ef236a5aa5
		https://gist.github.com/RiANOl/1077723
	*/

	function aes256Encrypt($key, $data, $mode = MCRYPT_MODE_CBC) {
		if(32 !== strlen($key)) $key = hash('SHA256', $key, true);
		$padding = 16 - (strlen($data) % 16);
		$data .= str_repeat(chr($padding), $padding);
		$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, $mode);
		$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
		return $iv.mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $data, $mode, $iv);
	}

	function aes256Decrypt($key, $data, $mode = MCRYPT_MODE_CBC) {
		if(32 !== strlen($key)) $key = hash('SHA256', $key, true);
		$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, $mode);
		$iv_dec = substr($data, 0, $iv_size);
		$data = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, $data, $mode, $iv_dec);
		$padding = ord($data[strlen($data) - 1]);
		$data = substr($data, 0, -$padding);
		$data = substr($data, $iv_size);
		return $data; 
	}