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<a href="https://gitlab.com/nmav">Nikos Mavrogiannopoulos</a>
commented on a
discussion on <a href="https://gitlab.com/gnutls/gnutls/merge_requests/1119#note_249441723">tests/tls13-server-kx-neg.c</a>:
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<pre style="margin: 0;">+<span id="LC260" class="line" lang="c"> <span class="p">},</span></span>
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<td class="diff-line-num new new_line" data-linenumber="261" 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="LC261" class="line" lang="c"> <span class="p">{</span></span>
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<td class="diff-line-num new new_line" data-linenumber="262" 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="LC262" class="line" lang="c"> <span class="p">.</span><span class="n" style="color: #333;">name</span> <span class="o" style="font-weight: 600;">=</span> <span class="s" style="color: #d14;">"TLS 1.2 server TLS 1.3 client with cred and GOST-512 cert"</span><span class="p">,</span></span>
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<td class="diff-line-num new new_line" data-linenumber="263" 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">
263
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<pre style="margin: 0;">+<span id="LC263" class="line" lang="c"> <span class="p">.</span><span class="n" style="color: #333;">server_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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<td class="diff-line-num new new_line" data-linenumber="264" 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="LC264" class="line" lang="c"> <span class="p">.</span><span class="n" style="color: #333;">client_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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<td class="diff-line-num new new_line" data-linenumber="265" 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="LC265" class="line" lang="c"> <span class="p">.</span><span class="n" style="color: #333;">have_cert_cred</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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<td class="diff-line-num new new_line" data-linenumber="266" 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="LC266" class="line" lang="c"> <span class="p">.</span><span class="n" style="color: #333;">have_gost12_512_cert</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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<td class="diff-line-num new new_line" data-linenumber="267" 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="LC267" class="line" lang="c"> <span class="p">.</span><span class="n" style="color: #333;">not_on_fips</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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<td class="diff-line-num new new_line" data-linenumber="268" 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="LC268" class="line" lang="c"> <span class="p">.</span><span class="n" style="color: #333;">server_prio</span> <span class="o" style="font-weight: 600;">=</span> <span class="s" style="color: #d14;">"NORMAL:-KX-ALL:+VKO-GOST-12:"</span> <span class="s" style="color: #d14;">"-VERS-ALL:+VERS-TLS1.2"</span><span class="p">,</span></span>
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<td class="diff-line-num new new_line" data-linenumber="269" 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="LC269" class="line" lang="c"> <span class="p">.</span><span class="n" style="color: #333;">client_prio</span> <span class="o" style="font-weight: 600;">=</span> <span class="s" style="color: #d14;">"NORMAL:-KX-ALL:+VKO-GOST-12:"</span><span class="n" style="color: #333;">PVERSION</span><span class="p">,</span></span>
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<td class="diff-line-num new new_line" data-linenumber="270" 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="LC270" class="line" lang="c"> <span class="p">.</span><span class="n" style="color: #333;">exp_version</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">GNUTLS_TLS1_2</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC271" class="line" lang="c"> <span class="p">},</span></span>
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<pre style="margin: 0;">+<span id="LC272" class="line" lang="c"> <span class="cm" style="color: #998; font-style: italic;">/* Ideally for the next two test cases we should fallback to TLS 1.2 + GOST</span></span>
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<pre style="margin: 0;">+<span id="LC273" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * but this is unsuppored for now */</span></span>
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<pre style="margin: 0;">+<span id="LC274" class="line" lang="c"> <span class="p">{</span></span>
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<pre style="margin: 0;">+<span id="LC275" class="line" lang="c"> <span class="p">.</span><span class="n" style="color: #333;">name</span> <span class="o" style="font-weight: 600;">=</span> <span class="s" style="color: #d14;">"TLS 1.3 server and client VKO-GOST-12 with cred and GOST-256 cert"</span><span class="p">,</span></span>
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<p dir="auto">I read it, and makes sense in the "protocol" view, but not necessarily with this project view. When we brought TLS1.3 we took extensive measures to eliminate these exact scenarios. gnutls will not fail if you negotiate</p>
<ul dir="auto">
<li>srp</li>
<li>rsa-psk</li>
<li>supplemental data</li>
<li>anonymous ciphersuites</li>
</ul>
<p dir="auto">That sets in my opinion, a bar which we shouldn't get under for the GOST. We should have connection failures only as a result of a bug, not by design (see also my comment on <a href="https://gitlab.com/gnutls/gnutls/issues/862" data-original="#862" data-link="false" data-link-reference="false" data-project="179611" data-issue="27409766" data-reference-type="issue" data-container="body" data-placement="bottom" title="Please prefer PFS ciphers over plain RSA ones." class="gfm gfm-issue has-tooltip">#862</a> - it is a similar protocol issue).</p>
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