function main()
{
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
if (array_key_exists('content', $_POST)) {
// define password bytes
$passwordBytes = Configuration::$aesPasswordBytes;
// decode
$content = $_POST['content'];
$decodedContent = base64_decode($content);
// decrypt
$decryptedContent = EncryptionHelper::decryptMessage($decodedContent, $passwordBytes);
$decryptedContent = StringHelper::untilLastOccurence($decryptedContent, '}');
// json decode
$highscoreData = json_decode($decryptedContent);
// store
$config = ConfidentialConfiguration::getDatabaseConfiguration();
$highscore = new Highscore($config->databaseHost, $config->databaseUserName, $config->databaseUserPassword, $config->databaseName);
$highscore->insert($highscoreData);
die(ResponseHelper::serializeResponse('Success', 'Success'));
} else {
die(ResponseHelper::serializeResponse('Error', 'The request must contain a POST parameter'));
}
} else {
die(ResponseHelper::serializeResponse('Error', 'Not a POST request, sorry'));
}
}
public static function decryptMessage($content, $passwordBytes)
{
// extract relevant portions of content
$iv = substr($content, -32);
$data = substr($content, 0, -32);
$keyString = StringHelper::getStringFromBytes($passwordBytes);
// debug
/*
echo 'bytes of encrypted message: ' . getStringBytesAsString($data) . '<br>';
echo 'bytes of iv: ' . getStringBytesAsString($iv) . '<br>';
echo 'bytes of key: ' . getStringBytesAsString($keyString) . '<br>';
echo 'num of bytes of key: ' . count(getStringBytesAsString($keyString)) . '<br>';
echo 'key in plaintext: ' . $keyString . '<br>'; */
// decrypt
return EncryptionHelper::aesDecrypt($data, $keyString, $iv);
}
