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<p style="color: #777777;">
<a href="https://gitlab.com/lumag">Dmitry Eremin-Solenikov</a>
commented on a
discussion on <a href="https://gitlab.com/gnutls/gnutls/merge_requests/1097#note_240910016">lib/auth/vko_gost.c</a>:
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<pre style="margin: 0;">+<span id="LC141" 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="LC142" class="line" lang="c">    <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC143" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC144" class="line" lang="c">    <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">info</span> <span class="o" style="font-weight: 600;">!=</span> <span class="nb" style="color: #0086b3;">NULL</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">info</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">ncerts</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="LC145" 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_get_auth_info_pcert</span><span class="p">(</span><span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333;">peer_cert</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC146" class="line" lang="c">                            <span class="n" style="color: #333;">session</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">security_parameters</span><span class="p">.</span></span>
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<pre style="margin: 0;">+<span id="LC147" class="line" lang="c">                            <span class="n" style="color: #333;">server_ctype</span><span class="p">,</span> <span class="n" style="color: #333;">info</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC148" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC149" 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="LC150" 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="LC151" 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>
</pre>
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<pre style="margin: 0;">+<span id="LC152" class="line" lang="c">            <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC153" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC154" class="line" lang="c">            <span class="n" style="color: #333;">has_pcert</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="LC155" class="line" lang="c">    <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC156" class="line" lang="c"></span>
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<p dir="auto">From my point of view decryption part does not contain any significant parts of code that can serve as an oracle. The only "problematic" item might be an <code>memcmp()</code> at the end of <code>lib/nettle/gost/gost-wrap.c</code>.</p>
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