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<a href="https://gitlab.com/alla.gofman">Alla Gofman</a> created an issue: <a href="https://gitlab.com/gnutls/gnutls/-/issues/1451">#1451</a>
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<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-color: #e6e6ea; border-bottom-style: solid; color: #333238; margin: 0 0 16px;" align="initial">
<a id="user-content-description-of-problem" class="anchor" href="#description-of-problem" aria-hidden="true" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Description of problem:</h2>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">Use FileZilla FTPS client. Connect protocol TLS 1.3.
Server based on Java 11 or higher.
Java TLS implementation on close sends "user_canceled" alert before sending "close_notify"
(for some backsword compatibility)</p>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">GnuTLS fails to retrieve directory listing with error:
<strong style="font-weight: bold; margin-top: 0;">tls_layer_impl::failure(-12)</strong>
and FileZilla client aborts connection on this error.</p>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">According to:
<a href="https://www.rfc-editor.org/rfc/rfc8446#section-6.1" rel="nofollow noreferrer noopener" target="_blank" style="margin-top: 0;">https://www.rfc-editor.org/rfc/rfc8446#section-6.1</a></p>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">user_canceled: This alert notifies the recipient that the sender is
canceling the handshake for some reason unrelated to a protocol
failure. If a user cancels an operation after the handshake is
complete, just closing the connection by sending a "close_notify"
is more appropriate. This alert SHOULD be followed by a
"close_notify". This alert generally has AlertLevel=warning.</p>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">** user_canceled - should be treated as a warning and not an error.</p>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">When called gnutls_record_recv() - GnuTLS returns code:
| -12 | GNUTLS_E_FATAL_ALERT_RECEIVED | A TLS fatal alert has been received. |</p>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">instead returning for example
| -16 | GNUTLS_E_WARNING_ALERT_RECEIVED | A TLS warning alert has been received. |</p>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">FileZilla client expects
| 0 | GNUTLS_E_SUCCESS | Success. |
Otherwise aborts connection.</p>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">Opened also bug to FileZilla:
<a href="https://trac.filezilla-project.org/ticket/12099" rel="nofollow noreferrer noopener" target="_blank" style="margin-top: 0;">https://trac.filezilla-project.org/ticket/12099</a></p>
<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-color: #e6e6ea; border-bottom-style: solid; color: #333238; margin: 24px 0 16px;" align="initial">
<a id="user-content-version-of-gnutls-used" class="anchor" href="#version-of-gnutls-used" aria-hidden="true" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Version of gnutls used:</h2>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">GnuTLS 3.6.7</p>
<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-color: #e6e6ea; border-bottom-style: solid; color: #333238; margin: 24px 0 16px;" align="initial">
<a id="user-content-distributor-of-gnutls-eg-ubuntu-fedora-rhel" class="anchor" href="#distributor-of-gnutls-eg-ubuntu-fedora-rhel" aria-hidden="true" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Distributor of gnutls (e.g., Ubuntu, Fedora, RHEL)</h2>
<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-color: #e6e6ea; border-bottom-style: solid; color: #333238; margin: 24px 0 16px;" align="initial">
<a id="user-content-how-reproducible" class="anchor" href="#how-reproducible" aria-hidden="true" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>How reproducible:</h2>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">Steps to Reproduce:</p>
<ul dir="auto" style="text-align: initial; list-style-type: disc; margin: 0 0 16px; padding: 0;">
<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">one
Use Server based on Java v11 оr higher.
See <a href="https://mina.apache.org/ftpserver-project/" rel="nofollow noreferrer noopener" target="_blank" style="margin-top: 0;">https://mina.apache.org/ftpserver-project/</a>
</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">two
Use FileZilla FTPS client to connect to above server with TLS 1.3 protocol to retrieve directory listing</li>
</ul>
<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-color: #e6e6ea; border-bottom-style: solid; color: #333238; margin: 24px 0 16px;" align="initial">
<a id="user-content-actual-results" class="anchor" href="#actual-results" aria-hidden="true" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Actual results:</h2>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">FileZilla client aborts the connection</p>
<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-color: #e6e6ea; border-bottom-style: solid; color: #333238; margin: 24px 0 16px;" align="initial">
<a id="user-content-expected-results" class="anchor" href="#expected-results" aria-hidden="true" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Expected results:</h2>
<p dir="auto" style="color: #333238; margin: 0;" align="initial">List directory succeeded</p>
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