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<blockquote dir="auto">
<p>That was intentional when DANE was implemented. I found the "trust anchor assertion" obsurd at
the time. So the way it was implemented was for the validation intention/plan has to be
specified by the user, not the server.</p>
</blockquote>
<p dir="auto">Browsing over the RFCs I agree that there is <em>some</em> client policy involved (e.g. MTAs my treat PKIX-TA/PKIX-EE as "unusable"). However with the current setup I am missing the expected result of a --dane option:</p>
<p dir="auto"><strong>X</strong> Full DANE support, i.e. additional checking of ca-verification with PKIX-TA/PKIX-EE but not for DANE-TA/DANE-EE. Do the right thing with mixed/multiple TLSA records.</p>
<p dir="auto">Instead gnutls-cli supports the following policies:</p>
<ol dir="auto">
<li>Ignore TLSA, no DANE support (--dane not specified)</li>
<li>Require DANE success in addition to ca-verification (--dane)</li>
<li>Treat PKIX-TA as if DANE-TA was set, treat PKIX-EE as if DANE-EE was used. (--dane --no-ca-verification)</li>
</ol>
<p dir="auto">I do not know what policies really make sense (apart from <strong>X</strong> and <strong>1</strong>) since I have not read all the RFCs. e.g. rfc7672 (SMTP) could use a policy to ignore PKIX-EE/PKIX-TA.</p>
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