Debian 12/bookwork - install openssl 1.1.1 from source

openssl 1.1.1 - debian12.txt

Openssl 1.1.x on GNU/Debian 12
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The following shows how to install openssl branch 1.1.x alongside debian default libssl3.

Some applications require to have:
- libssl.so.1.1
- libcrypto.so.1.1

Using the following allows one to not tamper with the system's default/setup,

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Install openssl 1.1.x version from source:

Select a version from:
https://www.openssl.org/source/old/1.1.1/index.html


# download source code and check integrity
wget https://www.openssl.org/source/openssl-1.1.1t.tar.gz

# create hosting directory under /opt
sudo mkdir -p /opt/openssl
sudo tar xfv openssl-1.1.1t.tar.gz -C /opt/openssl

# temporarily expose ld_library env for building
export LD_LIBRARY_PATH=/opt/openssl/lib
cd /opt/openssl/openssl-1.1.1t/

# config, build, test and install
sudo ./config --prefix=/opt/openssl --openssldir=/opt/openssl/ssl
sudo make && sudo make test && sudo make install

# to avoid conflict, make symlinks into distro default lib dir
sudo ln -s /opt/openssl/lib/libssl.so.1.1 /usr/lib/x86_64-linux-gnu/libssl.so.1.1
sudo ln -s /opt/openssl/lib/libcrypto.so.1.1 /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1
sudo ldconfig