mcrypt deprecated in php 7.1

[mabuonomo]

Hi,
on ubuntu 14.04 with php7.1

Deprecated: Function mcrypt_create_iv() is deprecated in /var/www/html/abbashare/vendor/kunalvarma05/dropbox-php-sdk/src/Dropbox/Security/McryptRandomStringGenerator.php on line 47

From php.net:
The Mcrypt library has been declared DEPRECATED since PHP 7.1, to use in its OpenSSL

[kunalvarma05]

Hey,

I'm working on a PHP7+ only version of the package.

For now, instead of the Kunnu/Dropbox/Security/McryptRandomStringGenerator class, you can use the Kunnu/Dropbox/Security/OpenSslRandomStringGenerator class.

This can be configured while initializing the Dropbox class. You can follow the Advanced Configuration guide which shows how you can swap the default McryptRandomStringGenerator with the OpenSslRandomStringGenerator or with your own implementation of the RandomStringGeneratorInterface.

Thanks for reporting :)

[Spreeuw]

Perhaps add a fallback to random_bytes() in case ext/openssl is not installed?