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<a href="https://gitlab.com/dueno">Daiki Ueno</a>
commented on a
discussion on <a href="https://gitlab.com/gnutls/gnutls/-/merge_requests/1345#note_439120769">src/psk.c</a>:
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<pre style="margin: 0;">+<span id="LC222" class="line" lang="c"> <span class="n" style="color: #333;">tmp</span><span class="p">.</span><span class="n" style="color: #333;">size</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">strlen</span><span class="p">(</span><span class="n" style="color: #333;">username</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC223" class="line" lang="c"></span>
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<td class="diff-line-num new new_line" data-linenumber="224" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
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<pre style="margin: 0;">+<span id="LC224" class="line" lang="c"> <span class="n" style="color: #333;">ret</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">gnutls_hex_encode2</span><span class="p">(</span><span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333;">tmp</span><span class="p">,</span> <span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333;">_username</span><span class="p">);</span></span>
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<td class="diff-line-num new new_line" data-linenumber="225" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
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<pre style="margin: 0;">+<span id="LC225" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">ret</span> <span class="o" style="font-weight: 600;"><</span> <span class="mi" style="color: #099;">0</span><span class="p">)</span> <span class="p">{</span></span>
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<pre style="margin: 0;">+<span id="LC226" class="line" lang="c"> <span class="n" style="color: #333;">fprintf</span><span class="p">(</span><span class="n" style="color: #333;">stderr</span><span class="p">,</span> <span class="s" style="color: #d14;">"HEX encoding error</span><span class="se" style="color: #d14;">\n</span><span class="s" style="color: #d14;">"</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC227" class="line" lang="c"> <span class="n" style="color: #333;">ret</span> <span class="o" style="font-weight: 600;">=</span> <span class="o" style="font-weight: 600;">-</span><span class="mi" style="color: #099;">1</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC228" class="line" lang="c"> <span class="k" style="font-weight: 600;">goto</span> <span class="n" style="color: #333;">out</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC229" class="line" lang="c"> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC230" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC231" class="line" lang="c"> <span class="cm" style="color: #998; font-style: italic;">/* prepend '#' */</span></span>
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<pre style="margin: 0;">+<span id="LC232" class="line" lang="c"> <span class="n" style="color: #333;">new_data</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">gnutls_realloc</span><span class="p">(</span><span class="n" style="color: #333;">_username</span><span class="p">.</span><span class="n" style="color: #333;">data</span><span class="p">,</span> <span class="n" style="color: #333;">_username</span><span class="p">.</span><span class="n" style="color: #333;">size</span> <span class="o" style="font-weight: 600;">+</span> <span class="mi" style="color: #099;">2</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC233" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">new_data</span><span class="p">)</span> <span class="p">{</span></span>
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<pre style="margin: 0;">+<span id="LC234" class="line" lang="c"> <span class="n" style="color: #333;">ret</span> <span class="o" style="font-weight: 600;">=</span> <span class="o" style="font-weight: 600;">-</span><span class="mi" style="color: #099;">1</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC235" class="line" lang="c"> <span class="k" style="font-weight: 600;">goto</span> <span class="n" style="color: #333;">out</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC236" class="line" lang="c"> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC237" class="line" lang="c"> <span class="n" style="color: #333;">memmove</span><span class="p">(</span><span class="n" style="color: #333;">_username</span><span class="p">.</span><span class="n" style="color: #333;">data</span> <span class="o" style="font-weight: 600;">+</span> <span class="mi" style="color: #099;">1</span><span class="p">,</span> <span class="n" style="color: #333;">_username</span><span class="p">.</span><span class="n" style="color: #333;">data</span><span class="p">,</span> <span class="n" style="color: #333;">_username</span><span class="p">.</span><span class="n" style="color: #333;">size</span><span class="p">);</span></span>
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<p dir="auto">Indeed, that's embarrassing :-) I've opened <a href="https://gitlab.com/gnutls/gnutls/-/merge_requests/1349" data-original="!1349" data-link="false" data-link-reference="false" data-project="179611" data-merge-request="76316584" data-project-path="gnutls/gnutls" data-iid="1349" data-mr-title="psktool: Fix hex-encoding logic of username" data-reference-type="merge_request" data-container="body" data-placement="top" title="" class="gfm gfm-merge_request">!1349</a> with a (hopefully) tighter logic.</p>
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