How to downgrade to OpenSSL 1.1.1

[yqi19]

^. My current openSSL version is OpenSSL 3.0.13 30 Jan 2024 (Library: OpenSSL 3.0.13 30 Jan 2024). I need OpenSSL 1.1.1 for experiments needed. How to downgrade openSSL 1.1.1. Thank you!

[kulkarniamit]

You can build it from source and install in your custom test directory using --prefix option

See the appropriate file for build instructions:
        INSTALL         Linux, Unix, Windows, OpenVMS, ...
        NOTES.*         INSTALL addendums for different platforms

You can also refer Compilation and Installation wiki to learn about configure options

NOTES

• Versions 1.1.1 and 1.0.2 are no longer supported.
• https://www.openssl.org/blog/blog/2023/03/28/1.1.1-EOL/
• https://www.openssl.org/policies/releasestrat.html