[RESOLVED] I need SHA256 hashing code (not WinAPI based)

Hi,

I need SHA256 calculation code, that is working on Windows XP SP3 (even those not fully updated).

Requirement:
- portability (no additional dll)

XP has:
- no bcrypt.dll
- no MS_ENH_RSA_AES_PROV "Microsoft Enhanced RSA and AES Cryptographic Provider"

Looks like I'm limited with pure mathematics algorithm.
Does somebody have one / ready implementation / or something very similar / or alternative API that I missed?

Thank you.