Having compatibility issues with OpenSSL on Rocky 9.5

## Context I am trying to build a small demo application that passes data between RTI DDS Connext topics and Kafka topics. This involves running RTI's Routing Service utility, which in turn runs a [kafka adapter] also provided by RTI. When I run the routing service application, I get the following error: librtikafkaadapter.so: /lib64/libldap.so.2: undefined symbol: EVP_md2, version OPENSSL_3.0.0 ## Question How do I get this kafka adapter to work with the version of OpenSSL that I have on my OS (Rocky 9.5, OpenSSL 3.2.2)? ## What I've Tried Through many hours of googling, I have been lead to believe that my OS (Rocky 9.5) uses a version of OpenSSL that has deprecated the use of this EVP_md2 algorithm. To fix this, I edited the /etc/ssl/openssl.cnf file to enable legacy providers, and verified in two different ways that legacy support is enabled: Firstly, I run openssl list -providers and see the support is activated:

Providers:
  default
    name: OpenSSL Default Provider
    version: 3.2.2
    status: active
  legacy
    name: OpenSSL Legacy Provider
    version: 3.2.2
    status: active

Second, I found (thanks google) that I can call the md2 algorithm from the command line: echo -n "aaa" | openssl md2 -provider legacy I then re-built the RTI kafka adapter library, but still receive the same error. I don't understand why I can run this md2 algorithm from the command line but that the code for this adapter can't call it. I have also tried installing a so-called compatibility engine compat-openssl11 that is supposed to provide backwards compatibility for old applications running on systems with newer versions of OpenSSL, but that also did not work. Any help would be appreciated. **Edit: Information requested in comments** rpm/dnf version of openldap: 2.6.6-3.el9