Encryption

[Jay S]

Hi,

I'm curious is there an encryption utility where I can, in the shell, type a "this is the phrase I want to encrypt" supply a password and have it encrypt and spit out an encrypted message? All from the command line.

likewise, do it in reverse?

Thanks

Jay

[eviljoel]

You can use gpg:

echo "text to encrypt" | gpg --symmetric --cipher-algo AES256 \
--pinentry-mode loopback > test.gpg
gpgconf --kill gpg-agent # To get gpg to forget the passphrase.
cat test.gpg | gpg --decrypt --pinentry-mode loopback

- eviljoel

--
Let me teach you encrypted e-mail. eviljoel's PGP fingerprint:
A2BE 2D12 24D1 67CA 8830 DDE7 DFB3 676B 196D 6430

[David L Carlson]

The way you phrased your question it sounds like you are asking for a symmetrical encryption/decryption algorithm, which, I think, does not exist, at least in a secure form. If you want to encrypt and later decrypt messages more than 256 characters long you might as well use a real program rather than work from the command line.

--
You received this message because you are subscribed to the Google Groups "Linux Users of Northern Illinois" group.
To unsubscribe from this group and stop receiving emails from it, send an email to luni-chicago...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/luni-chicago/CANpdWGXQQrBA%3DR-k6wYNm7HgU0UpzHAfgotuogtd9K-PZvA0CQ%40mail.gmail.com.

--

David Carlson

[Jay S]

Unfortunately, the version of GnuPG on my Cygwin doesn't have the "--pin-entrymode" option

C:\WINDOWS\system32> gpg --version
gpg (GnuPG) 2.2.11
libgcrypt 1.8.4
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

--
You received this message because you are subscribed to the Google Groups "Linux Users of Northern Illinois" group.
To unsubscribe from this group and stop receiving emails from it, send an email to luni-chicago...@googlegroups.com.

To view this discussion on the web visit https://groups.google.com/d/msgid/luni-chicago/5080cc61-7d60-37ce-4166-5e3d7dd2884b%40linux.com.

[Jay S]

Do you have a good suggestion for something I can install on Mac and Windows?

Simple / Free 

Thanks

Jay

To view this discussion on the web visit https://groups.google.com/d/msgid/luni-chicago/CANkahaYA1NLMBE%2BaaJrp7Qa1fwY40bA04te3KN9ArzLER6r-Tg%40mail.gmail.com.

[eviljoel]

Try removing the "--pinentry-mode loopback" parameter.

- eviljoel