MobaXterm OpenSSL

If you find the plugin useful, please leave a comment.

There are currently way too many versions of openssl. I’ll discontinue the compilations with all new version.
Github: Automatic compilation and creation of the openssl3 mobaxterm extension
Builds starting from April 2025 will contain the suggested options from OpenSSL Application Performance Tuning but not enable-ec_nistp_64_gcc_128 because 128 bit integers are not properly supported within Cygwin/Mobaxterm on Windows. This should make the libraries smaller: libcrypto – smaller by 33%, libssl – smaller by 42%
Starting with openssl 3.0.11 and 3.1.3 the plugins are not based on MobaXterm Plugins anymore.
There are different versions available. From mentioned versions (September 2023) on, just decide and use one version. 1.1.1 is out of support.
OpenSSL 3.6.0 is the latest version (October 2025). The extension only contains the openssl binary and the libraries. Do not combine with other version 3 extensions. Starting with 3.6 a new Compiler is used (GCC 11.3.0 vs. 4.9.x)

Series	Filename		Release	End-of-Life	Checksum
3.6	openssl-3.6.0.mxt3		01.10.2025	(TBD)
3.5	openssl-3.5.4.mxt3		30.09.2025	08.04.2030
3.4	openssl-3.4.3.mxt3		30.09.2025	22.10.2026
3.3	openssl-3.3.5.mxt3		30.09.2025	09.04.2026
3.2	openssl-3.2.6.mxt3		30.09.2025	23.11.2025
3.0	openssl-3.0.18.mxt3		30.09.2025	07.11.2026
1.1.1	openssl_1.1.1w.mxt3		09.2023	End-of-Life!
1.0.2	openssl_1.0.2_legacy.mxt3			End-of-Life!

Installation
Just put the extensions in place in the same path as your MobaXterm binary.
When you have configured a static root directory, you should delete that before installing a new version of the Plugin.
How is OpenSSL compiled?
You need to fetch a current perl and binutils in MobaXterm.
See also mobaxterm und openssl3 alpha 8 (German) and OpenSSL3 in MobaXterm (German).
Afterwards, this will be sufficient:

tar -xzf openssl...tgz
cd openssl...
./config
make

Why would I need a newer library and binary of openssl?
Older versions are simply unsupported.
OpenSSL 1.1.1 uses SNI as default. So it makes testing easier.
OpenSSL 1.1.1 supports TLS 1.3
OpenSSL 1.1.1 added support for LDAP via StartTLS.
OpenSSL 3 has the same features. You can test, if you’ll get into any troubles, when OpenSSL switches to version 3.
Can I get older/newer versions?
I’ll create new versions, depending on my time and needs.
Can I get help?
Basically no. But you may leave a comment here or reach out via mail to me.