Licensing of SecureHashAlgorithm on lua users wiki

[Jonas Thiem <jonasthiem@...>]

Hi,

does someone know the licensing of this specific snippet on the lua
users wiki? http://lua-users.org/wiki/SecureHashAlgorithm

It looks like something that would be useful to me, but of course I
don't want to use it without permission or violate whatever sort of
licensing it might have.

Regards,
Jonas Thiem