Poor man's encryption

poor-man-encryption.md

Say you have someones public key at pubkey.pub:

$ echo "potato" | openssl rsautl -encrypt -pubin -inkey <(ssh-keygen -f pubkey.pub -e -m PKCS8) -ssl | openssl base64

Now send the result to them, e.g. message.txt, and they have their private key at ~/.ssh/id_rsa

$ cat message.txt | openssl base64 -d | openssl rsautl -decrypt -inkey ~/.ssh/id_rsa