Internet Bug Bounty: Invalid parameter in memcpy function trough openssl_pbkdf2

Upstream: https://bugs.php.net/bug.php?id=72776 Summary: ------------ When keylength parameter is greater than 0x7fffffff, size parameter is interpreted as negative in memcpy, inside PKCS5PBKDF2HMAC function libcrypto.so. This issue happens only in PHP 5.6 branch. PHP 7.0 avoids this issue trough...