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<p dir="auto">We should avoid to open a can of worms here. For stringprep we need libidn, but we already have libidn2 as dependency. Also, StringPrep has been obsoleted by PRECIS (<a href="http://www.faqs.org/rfcs/rfc7564.html" rel="nofollow noreferrer noopener" target="_blank">RFC7564</a> and others). There is no open source implementation that I know of.</p>
<p dir="auto">Option we have</p>
<ul dir="auto">
<li>ignore this for now</li>
<li>hardcode LDAP StringPrep (or similar, whatever is needed)</li>
<li>split out StringPrep from libidn (new library libstringprep)</li>
<li>implement PRECIS as own library</li>
</ul>
<p dir="auto">I already considered the last two since a while. But it's a tedious and boring work and would automatically make me the maintainer of it... and I already have to maintain enough projects.</p>
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