CVSROOT:        /cvs
Module name:    src
Changes by:     t...@cvs.openbsd.org    2024/08/02 09:00:01

Modified files:
        lib/libtls     : tls.h tls_config.c 

Log message:
libtls: fix legacy protocol parsing

Redefining TLS_PROTOCOL_TLSv1_0 and TLS_PROTOCOL_TLSv1_1 to be the same
as TLS_PROTOCOL_TLSv1_2 had undesired side effects, as witnessed in the
accompanying regress tests. The protocol string all:tlsv1.0 would disable
TLSv1.2 (so only enable TLSv1.3) and tlsv1.2:!tlsv1.1 would disable all
protocols.

It makes more sense to ignore any setting of TLSv1.0 and TLSv1.1, so if
you request 'tlsv1.1' you get no protocol, but 'all:!tlsv1.1' will enable
the two supported protocols TLSv1.3 and TLSv1.2.

Restore the defines to their original values and adjust the parsing code
to set/unset them.

Issue reported by Kenjiro Nakayama
Fixes https://github.com/libressl/openbsd/issues/151

with/ok jsing

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