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<a href="https://gitlab.com/nmav">Nikos Mavrogiannopoulos</a>
commented:
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<p>Now assume misconfigured client which sends TLS 1.3 + TLS 1.2 + GOST ciphersuite. Should they be able to interoperate?</p>
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<p dir="auto">Let's write the use cases we are interested to handle. As you write above we have:</p>
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<li>client which sends TLS 1.3 + TLS 1.2 + GOST ciphersuite</li>
<li>client which sets up <code>-VER-TLS-ALL:+VER-TLS1.3:+KX-ALL</code>
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<p dir="auto">For (1) the current behavior would be fine, as it will disable TLS1.3 and use GOST. For (2) all is ok if GOST is not in the <code>KX-ALL</code> (current situation). If at some point GOST gets into the <code>NORMAL</code> priority then effectively <code>-VER-TLS-ALL:+VER-TLS1.3:+KX-ALL</code> will be synonymous to NONE.</p>
<p dir="auto">So as it is now, to my understanding, the problem with our handling of priority strings is that TLS-1.2 only key exchange (or even ciphers?) cannot be added in the default set. Do we agree on the problem?</p>
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