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<a href="https://gitlab.com/rockdaboot">Tim Rühsen</a>
commented on a discussion
on <a href="https://gitlab.com/gnutls/gnutls/commit/2063c6193af6653175e6bc073babea607e5b0ff4#note_136602212">lib/pkcs11.c</a>:
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<pre style="margin: 0;"> <span id="LC2534" class="line" lang="c"></span>
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<pre style="margin: 0;">-<span id="LC2535" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">temp_str</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC2536" class="line" lang="c"> <span class="n" style="color: #333;">len</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;">temp_str</span><span class="p">);</span></span>
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<pre style="margin: 0;">-<span id="LC2537" class="line" lang="c"> <span class="k" style="font-weight: 600;">else</span> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">str_max</span> <span class="o" style="font-weight: 600;">==</span> <span class="mi" style="color: #099;">0</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC2538" class="line" lang="c"> <span class="n" style="color: #333;">len</span> <span class="o" style="font-weight: 600;">=</span> <span class="mi" style="color: #099;">0</span><span class="p">;</span></span>
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<pre style="margin: 0;">-<span id="LC2539" class="line" lang="c"> <span class="k" style="font-weight: 600;">else</span></span>
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<pre style="margin: 0;">-<span id="LC2540" class="line" lang="c"> <span class="n" style="color: #333;">len</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">p11_kit_space_strlen</span><span class="p">(</span><span class="n" style="color: #333;">str</span><span class="p">,</span> <span class="n" style="color: #333;">str_max</span><span class="p">);</span></span>
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<pre style="margin: 0;">-<span id="LC2541" class="line" lang="c"></span>
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<pre style="margin: 0;">-<span id="LC2542" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">len</span> <span class="o" style="font-weight: 600;">+</span> <span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">></span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">output_size</span><span class="p">)</span> <span class="p">{</span></span>
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<pre style="margin: 0;">+<span id="LC2535" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">len</span> <span class="o" style="font-weight: 600;"><</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">output_size</span><span class="p">)</span> <span class="p">{</span></span>
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<pre style="margin: 0;">+<span id="LC2536" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">len</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC2537" class="line" lang="c"> <span class="n" style="color: #333;">memcpy</span><span class="p">(</span><span class="n" style="color: #333;">output</span><span class="p">,</span> <span class="n" style="color: #333;">str</span><span class="p">,</span> <span class="n" style="color: #333;">len</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC2538" class="line" lang="c"> <span class="p">((</span><span class="kt" style="color: #458; font-weight: 600;">char</span> <span class="o" style="font-weight: 600;">*</span><span class="p">)</span> <span class="n" style="color: #333;">output</span><span class="p">)[</span><span class="n" style="color: #333;">len</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> <span class="sc" style="color: #d14;">'\0'</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC2539" class="line" lang="c"> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">output_size</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">len</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC2540" class="line" lang="c"> <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>
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<pre style="margin: 0;">+<span id="LC2541" class="line" lang="c"> <span class="p">}</span> <span class="k" style="font-weight: 600;">else</span> <span class="p">{</span></span>
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<p dir="auto">I see. But we currently don't have a test that we can easily extend. The function is called during the tests only indirectly from p11tool. IMO we should have a fuzzer for the gnutls_pkcs11 API. But that is definitely a different issue.</p>
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