/**
* Encrypts and returns the data.
*
* @param NostoAccount $account the account to export the data for.
* @param NostoExportCollectionInterface $collection the data collection to export.
* @return string the encrypted data.
*/
public static function export(NostoAccount $account, NostoExportCollectionInterface $collection)
{
$data = '';
// Use the first 16 chars of the SSO token as secret for encryption.
$token = $account->getApiToken(NostoApiToken::API_SSO);
if (!empty($token)) {
$tokenValue = $token->getValue();
$secret = substr($tokenValue, 0, 16);
if (!empty($secret)) {
$iv = phpseclib_Crypt_Random::string(16);
$cipher = new NostoCipher();
$cipher->setSecret($secret);
$cipher->setIV($iv);
$cipherText = $cipher->encrypt($collection->getJson());
// Prepend the IV to the cipher string so that nosto can parse and use it.
// There is no security concern with sending the IV as plain text.
$data = $iv . $cipherText;
}
}
return $data;
}
/**
* Generates a random BigInteger
*
* Byte length is equal to $length. Uses phpseclib_Crypt_Random if it's loaded and mt_rand if it's not.
*
* @param Integer $length
* @return phpseclib_Math_BigInteger
* @access private
*/
function _random_number_helper($size)
{
if (class_exists('phpseclib_Crypt_Random')) {
$random = phpseclib_Crypt_Random::string($size);
} else {
$random = '';
if ($size & 1) {
$random .= chr(mt_rand(0, 255));
}
$blocks = $size >> 1;
for ($i = 0; $i < $blocks; ++$i) {
// mt_rand(-2147483648, 0x7FFFFFFF) always produces -2147483648 on some systems
$random .= pack('n', mt_rand(0, 0xffff));
}
}
return new static($random, 256);
}
/**
* Returns a unique ID that identifies this Magento installation.
* This ID is sent to the Nosto account config iframe and used to link all
* Nosto accounts used on this installation.
*
* @return string the ID.
*/
public function getInstallationId()
{
$installationId = $this->scopeConfig->getValue(self::XML_PATH_INSTALLATION_ID);
if (empty($installationId)) {
// Running bin2hex() will make the ID string length 64 characters.
$installationId = bin2hex(\phpseclib_Crypt_Random::string(32));
$this->_configWriter->save(self::XML_PATH_INSTALLATION_ID, $installationId);
// todo: clear cache.
}
return $installationId;
}
