public static function _init()
{
static::$crypter = new Crypt_AES();
static::$hasher = new Crypt_Hash('sha256');
// load the config
\Config::load('crypt', true);
static::$config = \Config::get('crypt', array());
// generate random crypto keys if we don't have them or they are incorrect length
$update = false;
foreach (array('crypto_key', 'crypto_iv', 'crypto_hmac') as $key) {
if (empty(static::$config[$key]) || strlen(static::$config[$key]) % 4 != 0) {
$crypto = '';
for ($i = 0; $i < 8; $i++) {
$crypto .= static::safe_b64encode(pack('n', mt_rand(0, 0xffff)));
}
static::$config[$key] = $crypto;
$update = true;
}
}
// update the config if needed
if ($update === true) {
try {
\Config::save('crypt', static::$config);
} catch (\FileAccessException $e) {
// failed to write the config file, inform the user
echo \View::factory('errors/crypt_keys', array('keys' => static::$config));
die;
}
}
static::$crypter->enableContinuousBuffer();
static::$hasher->setKey(static::safe_b64decode(static::$config['crypto_hmac']));
}
