I am looking for an easy encryption program, usable from the linux command line. Preferably a single static binary. I tried scrypt (tarsnap), but it prompts for a password with no way to input as a flag. This means it cannot be used from a script.
Thank you for the help!
1 Answer
You could use PGP/gpg:
# Encrypt
gpg --output file.gpg --encrypt --recipient [email protected] file
# Decrypt
gpg --output file --decrypt file.gpg
Before you can do that, you need to create a key pair and import it to your keyring. See the manual on how to do it: https://www.gnupg.org/gph/en/manual/book1.html
<<<operator. Also, a standard way to automate tasks which require user input is the Expect program, which likely already comes installed on your system and is easily acquired if not.expect, though the Wikipedia entry actually does have some nice examples already.