The environment you are working in can make recompiling more or less easy. With Linux, etc., it is usually very easy to re-compile both. With Windows, re-compiling stunnel is more difficult and openssl provides scripts for building a new version using Visual C++. I have seen a note on the openssl discussions stating that normally one can upgrade to a new revision of the libraries without rebuilding the programs using the libraries. So you can can go from 1.0.1c to 1.0.1d, or 1.0.2a to 1.0.2b, etc. I have done this in the past and have had no difficulties. However, stunnel does generate a warning message at start up that the build libraries and the run libraries are at different levels and recommends that stunnel should be rebuilt. This discussion presumes that you are using shared openssl libraries with stunnel, and you do have to pay attention to linkage issues to get the correct libraries. To the best of my knowledge, Windows only allows one version of a DLL with a given name to be active at a time and all programs requesting the named DLL will use an already loaded version of the DLL even if a different version is in the current load path at the time.

Carter

On 6/25/2015 7:18 AM, Jhon BYaka wrote:
I'm think, recompiling it's best way.
In manual, in 'Installing' section you can find how to force path to specific version of openSSL when configure build env. Then compile it.

ср, 24 июня 2015 г. в 18:58, Paul Randall <[email protected] <mailto:[email protected]>>:

    Hi folks,
    Can you please tell me the process for swapping out the version of
OpenSSL that comes with Stunnel for a newer version of OpenSSL? Is there a quick way to do this or does it require recompiling
    Stunnel?
    Thanks.
    Paul
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