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Merge request <a href="https://gitlab.com/gnutls/gnutls/-/merge_requests/1341">!1341</a> was reviewed by <a href="https://gitlab.com/smuellerDD">Stephan Mueller</a>
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<a href="https://gitlab.com/smuellerDD">Stephan Mueller</a>
commented on a
<a href="https://gitlab.com/gnutls/gnutls/-/merge_requests/1341#note_424424030">discussion</a>:
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<p dir="auto">The TLS 1.3 use of HKDF and the specification in SP800-56C rev 1 are not the same. For TLS, basically the system invokes HKDF in a number of steps to get to the different key material.</p>
<p dir="auto">For a self test I could fathom that as input you use a shared secret and as output you gather the exporter master secret that you compare with a known good value. But any other type of generated secret would suffice too. That should be done using the same code that is used by the TLS stack.</p>
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