I was curious how I would accomplish this and found (this)[https://opensource.com/article/21/4/encryption-decryption-openssl] handy source.
Here are the relevant commands from the blog post
1openssl genrsa -aes128 -out alice_private.pem 1024
2ls -l alice_private.pem
3openssl genrsa -aes128 -out bob_private.pem 1024
4ls -l bob_private.pem
5openssl rsa -in alice_private.pem -noout -text
6openssl rsa -in alice_private.pem -pubout > alice_public.pem
7ls -l *.pem
8openssl rsa -in alice_public.pem -pubin -text -noout
9openssl rsa -in bob_private.pem -pubout > bob_public.pem
10ls -l *.pem
11scp alice_public.pem bob@bob-machine-or-ip:/path/
12scp bob_public.pem alice@alice-machine-or-ip:/path/
13ls -l bob_public.pem
14ls -l alice_public.pem
15echo "vim or emacs ?" > top_secret.txt
16cat top_secret.txt
17openssl rsautl -encrypt -inkey bob_public.pem -pubin -in top_secret.txt -out top_secret.enc
18ls -l top_secret.*
19cat top_secret.txt
20cat top_secret.enc
21hexdump -C ./top_secret.enc
22file top_secret.enc
23rm -f top_secret.txt
24scp top_secret.enc bob@bob-machine-or-ip:/path/
25ls -l top_secret.enc
26cat top_secret.enc
27hexdump -C top_secret.enc
28openssl rsautl -decrypt -inkey bob_private.pem -in top_secret.enc > top_secret.txt
29ls -l top_secret.txt
30cat top_secret.txt
31echo "nano for life" > reply_secret.txt
32cat reply_secret.txt
33openssl rsautl -encrypt -inkey alice_public.pem -pubin -in reply_secret.txt -out reply_secret.enc
34ls -l reply_secret.enc
35cat reply_secret.enc
36hexdump -C ./reply_secret.enc
37scp reply_secret.enc alice@alice-machine-or-ip:/path/
38ls -l reply_secret.enc
39cat reply_secret.enc
40openssl rsautl -decrypt -inkey alice_private.pem -in reply_secret.enc > reply_secret.txt
41ls -l reply_secret.txt
42cat reply_secret.txt