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<a href="https://gitlab.com/juaristi">Ander Juaristi</a>
commented on a
discussion on <a href="https://gitlab.com/gnutls/gnutls/-/merge_requests/1367#note_534039593">lib/x509/x509_ext.c</a>:
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<pre style="margin: 0;">+<span id="LC3703" class="line" lang="c"> <span class="cm" style="color: #998; font-style: italic;">/* Timestamp */</span></span>
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<pre style="margin: 0;">+<span id="LC3704" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">length</span> <span class="o" style="font-weight: 600;"><=</span> <span class="k" style="font-weight: 600;">sizeof</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">uint64_t</span><span class="p">))</span> <span class="p">{</span></span>
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<pre style="margin: 0;">+<span id="LC3705" class="line" lang="c"> <span class="n" style="color: #333;">gnutls_assert</span><span class="p">();</span></span>
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<pre style="margin: 0;">+<span id="LC3706" 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_E_PREMATURE_TERMINATION</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC3707" class="line" lang="c"> <span class="k" style="font-weight: 600;">goto</span> <span class="n" style="color: #333;">cleanup</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC3708" class="line" lang="c"> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC3709" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC3710" class="line" lang="c"> <span class="n" style="color: #333;">sct</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">timestamp</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">uint64_t</span><span class="p">)</span> <span class="n" style="color: #333;">_gnutls_read_uint64</span><span class="p">(</span><span class="n" style="color: #333;">ptr</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC3711" class="line" lang="c"> <span class="n" style="color: #333;">ptr</span> <span class="o" style="font-weight: 600;">+=</span> <span class="k" style="font-weight: 600;">sizeof</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">uint64_t</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC3712" class="line" lang="c"> <span class="n" style="color: #333;">length</span> <span class="o" style="font-weight: 600;">-=</span> <span class="k" style="font-weight: 600;">sizeof</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">uint64_t</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC3713" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC3714" class="line" lang="c"> <span class="cm" style="color: #998; font-style: italic;">/*</span></span>
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<pre style="margin: 0;">+<span id="LC3715" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * There are no extensions defined in SCT v1.</span></span>
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<pre style="margin: 0;">+<span id="LC3716" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * Check that there are actually no extensions - the following two bytes should be zero.</span></span>
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<pre style="margin: 0;">+<span id="LC3717" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> */</span></span>
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<pre style="margin: 0;">+<span id="LC3718" 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;">ptr</span> <span class="o" style="font-weight: 600;">!=</span> <span class="mi" style="color: #099;">0</span> <span class="o" style="font-weight: 600;">||</span> <span class="o" style="font-weight: 600;">*</span><span class="p">(</span><span class="n" style="color: #333;">ptr</span><span class="o" style="font-weight: 600;">+</span><span class="mi" style="color: #099;">1</span><span class="p">)</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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<p dir="auto">I've rewritten it as:</p>
<pre class="code highlight js-syntax-highlight c" lang="c" v-pre="true" style="background-color: #fff; font-family: monospace; font-size: 90%; -premailer-cellpadding: 0; -premailer-cellspacing: 0; -premailer-width: 100%; color: #998; font-style: italic; margin: 0;"><code><span id="LC1" class="line" lang="c"><span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">length</span> <span class="o" style="font-weight: 600;"><</span> <span class="mi" style="color: #099;">2</span> <span class="o" style="font-weight: 600;">||</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">ptr</span> <span class="o" style="font-weight: 600;">!=</span> <span class="mi" style="color: #099;">0</span> <span class="o" style="font-weight: 600;">||</span> <span class="o" style="font-weight: 600;">*</span><span class="p">(</span><span class="n" style="color: #333;">ptr</span><span class="o" style="font-weight: 600;">+</span><span class="mi" style="color: #099;">1</span><span class="p">)</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>
<span id="LC2" class="line" lang="c"> <span class="n" style="color: #333;">gnutls_assert</span><span class="p">();</span></span>
<span id="LC3" 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_E_UNEXPECTED_EXTENSIONS_LENGTH</span><span class="p">;</span></span>
<span id="LC4" class="line" lang="c"> <span class="k" style="font-weight: 600;">goto</span> <span class="n" style="color: #333;">cleanup</span><span class="p">;</span></span>
<span id="LC5" class="line" lang="c"><span class="p">}</span></span></code></pre>
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