How to use system libcrypto.so.1.1 instead of MATLAB libcrypto.so.1.1 to avoid error: symbol EVP_KDF_ctrl version OPENSSL_1_1_1b not defined in file libcrypto.so.1.1

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Tong Zhao
Tong Zhao on 16 Feb 2022
Commented: Walter Roberson on 17 Feb 2022
Since I work on a cluster and I'm not the admin, I simply cannot delete any files from the <MATLABROOT> folder. I wonder is there an alternative way, to block the particular file from MATLAB search path? Thanks.
The reason why I wanted to block a particular file from <MATLABROOT>, is because due to the parculiarity of the OS, Linux CentOS 8 (a RedHat variant of Linux), the existence of a file in <MATLABROOT> (that is, libcrypto.so.1.1) is having conflict with the OS system files, and the error reads:
Unable to load bundle binary /cm/shared/apps/spack/cpu/opt/spack/linux-centos8-zen/gcc-8.3.1/matlab-2020b-o5lrpkierrdeih7cfjaxm3yofipxbff6/bin/glnxa64/builtins/shared_dastudio_builtins/mwdastudio_builtinimpl.so. Error:
/lib64/libk5crypto.so.3: symbol EVP_KDF_ctrl version OPENSSL_1_1_1b not defined in file libcrypto.so.1.1 with link time reference: Success
Although I found some other solutions such as this post or this other post, but the solution requires removing this particular file from <MATLABROOT>, to which I do not have the privilege. So I am thinking about the possiblity of blocking it within MATLB search path instead of deleting it. IS there a way this could work?
  4 Comments
Tong Zhao
Tong Zhao on 16 Feb 2022
@Stephen Stephen, I have the following
findstr(strcat(path(),':'),strcat(R,':'))
ans =
[]
Ok, I got your point, so you're saying, the <MATLAB> root is not on my search path. So maybe let me ask this question instead: how to ensure that when I run a Simulink model in the MATLAB installed on the particular OS, a file 'MATLABROOT//bin/glnxa64/libcrypto.so.1.1' is not referenced, instead, the OS's own version of libcrypto.so.1.1 will be referenced?

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Accepted Answer

Tong Zhao
Tong Zhao on 17 Feb 2022
Edited: Tong Zhao on 17 Feb 2022
I found an answer to my own problem, thanks to my cluster admin, and @Walter Roberson. And the solution turned out to be not exactly blocking a file from the search path, but adding the system dll / so files to the LD_PRELOAD environment variable before running matlab. So I will change the question title from
"How to block a file from MATLAB search path" to "How to use system libcrypto.so.1.1 instead of MATLAB libcrypto.so.1.1 to avoid error symbol EVP_KDF_ctrl version OPENSSL_1_1_1b not defined in file libcrypto.so.1.1"
Here's the workaround solution that worked for me:
in the linux terminal, do:
export LD_PRELOAD=/usr/lib64/libcrypto.so.1.1
before the MATLAB run.
What this does, as it seems to me, is that it prioritizes libraries that it specifies, which is exactly what I needed.

More Answers (1)

Walter Roberson
Walter Roberson on 16 Feb 2022
In Linux, it is not possible for a non-privileged process to disable using an individual dll in a directory that it does not have write access to.
You must either get the cluster administrator to delete the file, or else you need to create a copy of the directory that omits the dll and change LD_LIBRARY_PATH to have the new dll instead of the other. (Changing LD_LIBRARY_PATH is ignored for suid or sguid processes, but matlab is not either of those.)
  7 Comments
Walter Roberson
Walter Roberson on 17 Feb 2022
I'm thinking if there's a way to set priority of a file in environment variables, so that instead of getting shadowed, it always will be picked first?
That is what the LD_LIBRARY_PATH does. The search order starts from the first directory in the environment variable. (Though at the moment I do not recall if Linux also permits a search path to be compiled into executables. I seem to recall that it does. Such a compiled-in path is necessary to proper security functioning of suid / sguid executables, which must ignore LD_LIBRARY_PATH since the user is permitted to change LD_LIBRARY_PATH .)

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