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Shell Programming and Scripting
shell script encrypt a file using gpg
Post 302351194 by Deepakbabu on Monday 7th of September 2009 01:06:21 PM
09-07-2009
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LEARN ABOUT CENTOS
amcrypt
AMCRYPT(8) System Administration Commands AMCRYPT(8) NAME
amcrypt - reference crypt program for Amanda symmetric data encryption SYNOPSIS
amcrypt DESCRIPTION
amcrypt requires aespipe, uuencode and gpg to work. Aespipe is available from : http://loop-aes.sourceforge.net amcrypt will search for the aespipe program in the following directories: /usr/bin:/usr/local/bin:/sbin:/usr/sbin. amcrypt calls amaespipe and pass the passphrase through file descriptor 3. The passphrase should be stored in ~amanda/.am_passphrase. HOW TO CREATE ENCRYPTION KEYS FOR AMCRYPT
1. Create 65 random encryption keys and encrypt those keys using gpg. Reading from /dev/random may take indefinitely long if kernel's random entropy pool is empty. If that happens, do some other work on some other console (use keyboard, mouse and disks). head -c 2925 /dev/random | uuencode -m - | head -n 66 | tail -n 65 | gpg --symmetric -a > ~amanda/.gnupg/am_key.gpg This will ask for a passphrase. Remember this passphrase as you will need it in the next step. 2. Store the passphrase inside the home-directory of the AMANDA-user and protect it with proper permissions: echo my_secret_passphrase > ~amanda/.am_passphrase chown amanda:disk ~amanda/.am_passphrase chmod 700 ~amanda/.am_passphrase KEY AND PASSPHRASE
amcrypt uses the same key to encrypt and decrypt data. It is very important to store and protect the key and the passphrase properly. Encrypted backup data can only be recovered with the correct key and passphrase. SEE ALSO
amanda(8), amanda.conf(5), aespipe(1), amaespipe(8), gpg(1) The Amanda Wiki: : http://wiki.zmanda.com/ AUTHOR
Kevin Till <kevin.till@zmanda.com> Zmanda, Inc. (http://www.zmanda.com) Amanda 3.3.3 01/10/2013 AMCRYPT(8)