Re: [Fetchmail-users] OAUTH2 Dilemma

[Matthias A. <mat...@gm...>]

Am 26.03.22 um 21:20 schrieb Dennis Putnam:
> It appears Fetchmail 7 requires TLS 1.3. I am running CentOS 7 and the
> support folks tell me that RedHat does not intend to add TLS 1.3 to
> CentOS. I wonder if it will be added to RHEL? Anyway, that means I am
> stuck using Fetchmail 6 for the foreseeable future. Before I go to the
> trouble, do the OAUTH2 patches for Fetchmail 6 also require TLS 1.3? TIA.
>
Dennis,

that's a bit of a letdown although I understand that in a stable CentOS
7 series they don't want major changes, and TLS v1.3 in itself is one,
so you are stuck between a rock and a hard place... but you can work
yourself out of this.

You can install the latest OpenSSL 3.0.x to a separate directory,
WARNING UNTESTED because I do not have CentOS 7,
but somewhere along the lines of but maybe needs tweaking:
unpack OpenSSL 3.0.x, then
./config --prefix /opt/openssl3 --openssldir=/usr/lib64
-Wl,-rpath=/opt/openssl3/lib
-- and then point your fetchmail 7 alpha build there to use it, with
./configure --with-ssl=/opt/openssl3

The additional burden on you will then be to watch future OpenSSL 3.0.x
releases and upgrade your /opt/openssl3 should security fixes become
necessary in some future OpenSSL version, so take notes of what worked
for you if you had to tweak things.

Hope that helps.
Matthias