[fpc-devel] Implementing SHA256 Unit.

[Garry Wood]

On Mar 20, 2016 8:14 PM, Michael Van Canneyt <michael at freepascal.org> wrote:
>
>
>
> On Sun, 20 Mar 2016, Garry Wood wrote:
>
> >> I'm trying to write a sha256 implementation in pure pascal like sha1 and md5 units.
> >> With negative results.
> >> Someone can helpme with this?
> >
> > I recently ported the implementation from LibTimCrypt / wpa_supplicant (which are both from public domain implementations), you can find the unit here:
> >
> > https://github.com/ultibohub/Core/blob/master/source/rtl/ultibo/core/crypto.pas
> >
> > This is for our Ultibo embedded project but the code is pure pascal and should compile for any platform if you adjust the uses clause.
> >
> > This has been validated against a number of test vectors available from different sources and seems correct although I can’t test on big endian CPU at present. The unit also includes ports of AES, DES, DES3 and RC4 ciphers as well as MD5 and SHA1.
>
> Would it be OK to extract some of the routines and include them in Free Pascal
> using the usual license ? We have several of these routines, but not all, it
> would be nice to have a more complete set available by default.
>
> Michael.

Yes, no problem. The original sources are credited to public domain implementation and the Ultibo license is identical to the FPC RTL.

Cheers,

Garry.