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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/775#note_112880134">lib/handshake-tls13.c</a>:
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<pre style="margin: 0;"> <span id="LC423" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#endif</span></span>
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<pre style="margin: 0;"> <span id="LC424" class="line" lang="c"> <span class="n" style="color: #333;">FALLTHROUGH</span><span class="p">;</span></span>
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<pre style="margin: 0;"> <span id="LC425" class="line" lang="c"> <span class="k" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">STATE101</span><span class="p">:</span></span>
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<pre style="margin: 0;">-<span id="LC391" class="line" lang="c"> <span class="n" style="color: #333;">ret</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">-<span id="LC392" class="line" lang="c"> <span class="n" style="color: #333;">generate_and_set_hs_traffic_keys</span><span class="p">(</span><span class="n" style="color: #333;">session</span><span class="p">);</span></span>
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<pre style="margin: 0;"> <span id="LC426" class="line" lang="c"> <span class="n" style="color: #333;">STATE</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">STATE101</span><span class="p">;</span></span>
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<pre style="margin: 0;">-<span id="LC394" class="line" lang="c"> <span class="n" style="color: #333;">IMED_RET_FATAL</span><span class="p">(</span><span class="s" style="color: #d14;">"generate session keys"</span><span class="p">,</span> <span class="n" style="color: #333;">ret</span><span class="p">,</span> <span class="mi" style="color: #099;">0</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC427" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">session</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">internals</span><span class="p">.</span><span class="n" style="color: #333;">hsk_flags</span> <span class="o" style="font-weight: 600;">&</span> <span class="n" style="color: #333;">HSK_EARLY_DATA_ACCEPTED</span><span class="p">)</span> <span class="p">{</span></span>
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<p dir="auto">It is possible, but we need to duplicate:</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="n" style="color: #333;">ret</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">generate_hs_traffic_keys</span><span class="p">(</span><span class="n" style="color: #333;">session</span><span class="p">);</span></span>
<span id="LC2" class="line" lang="c"><span class="n" style="color: #333;">IMED_RET_FATAL</span><span class="p">(</span><span class="s" style="color: #d14;">"generate hs traffic keys"</span><span class="p">,</span> <span class="n" style="color: #333;">ret</span><span class="p">,</span> <span class="mi" style="color: #099;">0</span><span class="p">);</span></span></code></pre>
<p dir="auto">in both branches, as it touches <code>session->key.proto.tls13.temp_secret</code>. Anyway, did that change.</p>
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