[openssl-commits] Still Failing: openssl/openssl#10097 (master - 8313a78)

[Travis CI]

Build Update for openssl/openssl
-------------------------------------

Build: #10097
Status: Still Failing

Duration: 18 minutes and 20 seconds
Commit: 8313a78 (master)
Author: Benjamin Kaduk
Message: Allow an ALPN callback to pretend to not exist

RFC 7301 mandates that the server SHALL respond with a fatal
"no_application_protocol" alert when there is no overlap between
the client's supplied list and the server's list of supported protocols.
In commit 062178678f5374b09f00d70796f6e692e8775aca we changed from
ignoring non-success returns from the supplied alpn_select_cb() to
treating such non-success returns as indicative of non-overlap and
sending the fatal alert.

In effect, this is using the presence of an alpn_select_cb() as a proxy
to attempt to determine whether the application has configured a list
of supported protocols.  However, there may be cases in which an
application's architecture leads it to supply an alpn_select_cb() but
have that callback be configured to take no action on connections that
do not have ALPN configured; returning SSL_TLSEXT_ERR_NOACK from
the callback would be the natural way to do so.  Unfortunately, the
aforementioned behavior change also treated SSL_TLSEXT_ERR_NOACK as
indicative of no overlap and terminated the connection; this change
supplies special handling for SSL_TLSEXT_ERR_NOACK returns from the
callback.  In effect, it provides a way for a callback to obtain the
behavior that would have occurred if no callback was registered at
all, which was not possible prior to this change.

Reviewed-by: Matt Caswell <matt at openssl.org>
Reviewed-by: Rich Salz <rsalz at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2570)

View the changeset: https://github.com/openssl/openssl/compare/f120fa1efe63...8313a787d770

View the full build log and details: https://travis-ci.org/openssl/openssl/builds/220617660

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