Create a simple function in C++ with needed files that allows doing the following
function encrypt_json($data,$key)
{
$encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $data, MCRYPT_MODE_ECB);
return $encrypted;
}
function decrypt_json($data,$key)
{
$decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $data, MCRYPT_MODE_ECB);
return $decrypted;
}