From :: https://www.suse.com/releasenotes/x86_64/SUSE-SLES/12-SP4/
4.2.2 Support for TLS 1.3 in OpenSSL 1.1.1 REPORT BUG#
TLS 1.3 is a new version of the Transport Layer Security protocol with some major differences and improvements over the established TLS 1.2. This new protocol version is only available in OpenSSL 1.1.1 or later. This new version is not binary-compatible with the default version of OpenSSL in SLE 12 SP4 (OpenSSL 1.0), and has known differences in the API that require making adjustments before applications can benefit from the changes.
OpenSSL 1.1.1 with support for TLSv1.3 is shipped as an option. In SLE 12 SP4, the libraries can be loaded into the same binary image along with OpenSSL 1.0 with symbol versioning enabled. To take advantage of this new protocol option, applications need to be built with OpenSSL 1.1.1 explicitly.
OpenSSL 1.0 remains the default for system libraries, services and tools.
[QUOTE=ab;56825]It may help if you can provide a link to the docs you are reading. I know
with SLES 11 there was a new Security Module added providing newer OpenSSL
support way back then, which was able to be installed concurrently so only
the things you needed would use it. I also know that with SLES 12 and/or
15 there is a legacy module which has some older things, so maybe that,
too, can be installed concurrently. Still, I have not tried the latter on
SLES 15, and maybe it requires certain steps, so seeing the docs would
maybe help us help you.
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