# [NTG-context] SHA calculation

Pablo Rodriguez oinos at gmx.es
Sun Aug 28 19:07:07 CEST 2022

On 8/28/22 12:25, Hans van der Meer via ntg-context wrote:
>
> With \directlua{context(md5.hex([===[#1]===]))} I can calculate the MD5
> checksum.
> I thought there was another call for the calculation of the SHA
> checksum, but I could not find it in the documentation or on the context
> garden.
> Where to look?

Dear dr. van der Meer,

it is my fault since Hans explained this before (to me).

Here you have the minimal sample:

\ctxlua{require("util-sha")}

\def\shatwo#1{%
\cldcontext{utilities.sha2.hash256("#1")}}

\def\shafive#1{%
\cldcontext{utilities.sha2.hash512("#1")}}

\def\shatwofile#1{%

\def\shafivefile#1{%

\starttext
\def\testtext{abc}
\def\testfile{xml-mkiv.pdf}

\shatwo{\testtext}\\
\shafive{\testtext}

\shatwofile{\testfile}\\
\shafivefile{\testfile}
\stoptext

Would you be so kind to add it to the wiki?

I hope it may help,

Pablo