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643 bytes added ,  14:24, 29 August 2022
first sample
ConTeXt needs no external programs to generate SHA for text and external files:

<context source="yes">
\ctxlua{require("util-sha")}

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

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

\def\shatwofile#1{%
\cldcontext{utilities.sha2.hash256(io.loaddata("#1"))}}

\def\shafivefile#1{%
\cldcontext{utilities.sha2.hash512(io.loaddata("#1"))}}

\def\testtext{abc}
\def\testfile{\jobname.tex}

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

\shatwofile{\testfile}\\
\shafivefile{\testfile}
</context>

It may be even used when embedding external files with {{cmd|attachment}}.
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