Native support for Windows

[tomfitzhenry]

There is native support for Darwin, FreeBSD and Linux, but not Windows. Performance on Windows, consequently, is poor.

Windows support would be appreciated!

[tomfitzhenry]

The use of Unix headers (sys/mman.h), https://github.com/wg/scrypt/blob/master/src/main/c/crypto_scrypt-nosse.c#L32 , that aren't available on Windows will make this harder.

I realise you won't want to change the C code, since it's a copy of the original scrypt code. Perhaps https://github.com/barrysteyn/scrypt-windows would be useful, which aims to compile scrypt on Windows, without changing any of the original code, and without depending on MinGW or Cygwin.

[tomfitzhenry]

So it turns out MinGW exists, and allows you to build DLLs on Linux. How convenient. Further, this has already been done: FauxFaux@887936d . I'll prepare a pull request with the relevant commits.