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Merge request <a href="https://gitlab.com/gnutls/gnutls/-/merge_requests/1906">!1906</a> was reviewed by <a href="https://gitlab.com/valdaarhun">Sahil Siddiq</a>
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<a href="https://gitlab.com/valdaarhun">Sahil Siddiq</a>
commented on a
<a href="https://gitlab.com/gnutls/gnutls/-/merge_requests/1906#note_2265909200">discussion</a>:
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<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">Hi, I think I misunderstood how "early data" is negotiated. I spent some time understanding the implementation of early data, session tickets and tests/tls13-early-data-neg*.c. My understanding is that "early data" is negotiated when the server sends a session ticket with the relevant extension rather than simply being initialized with <code style='font-size: 90%; color: #18171d; word-wrap: break-word; border-radius: .25rem; background-color: #ececef; margin-top: 0; font-weight: inherit; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 0.125rem 0.25rem;'>GNUTLS_ENABLE_EARLY_DATA</code>.</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">I have modified tests/tls13-early-data-neg2.c instead of creating a new test. The test currently makes use of 2 sessions to check that "early data" is rejected by the server when resumption fails (in the current case because the first session ticket key is overwritten).</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">This test now establishes 3 sessions instead of 2. No session ticket is sent during the first session to negotiate "early data". Due to this, "max_early_data_size" for the client is 0 after resumption is attempted in the second session.</p>
<p dir="auto" style="color: #3a383f; margin: 0;" align="initial">The second and third sessions together perform the checks done in the original test.</p>
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