Let's encrypt stuff with openssl
$ uname -a
Linux polaris 6.0.10-arch2-1 #1 SMP PREEMPT_DYNAMIC Sat, 26 Nov 2022 16:51:18 +0000 x86_64 GNU/Linux
$ echo hello ssl > file.txt
$ openssl enc -aes-256-cbc \
-pass pass:1234567890abcdefgijklmnopqrstuvwxyz \
-in file.txt -out file.enc
*** WARNING : deprecated key derivation used.