09-08-2009
shell script encrypt a file using gpg Reply to Thread
Thanks for the reply.
Actually i checked the question.
It says
/*************************************************/
" There is no assurance this key belongs to the named user"
It is NOT certain that the key belongs to the person named
in the user ID. If you *really* know what you are doing,
you may answer the next question with yes.
Use this key anyway? (y/N)
/**************************************************/
If i give y, the file is successfully encrypted. Please note that i am using the below command to encrypt:
gpg --yes -eq -r "key_nm" -o file.pgp file.txt
By the way, i was not able to see the expect command in unix. Does it require any installation? If so where can i find the same.
Sincerely appreciate your help.
Thanks
Deepak
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LEARN ABOUT DEBIAN
amgpgcrypt
AMGPGCRYPT(8) System Administration Commands AMGPGCRYPT(8)
NAME
amgpgcrypt - reference crypt program for Amanda public-key data encryption
SYNOPSIS
amgpgcrypt to be called by Amanda only
DESCRIPTION
amgpgcrypt calls gpg to perform public-key data encryption on Amanda backup. amgpgcrypt will search for the gpg program in the following
directories: /usr/local/bin:/usr/bin:/usr/sbin:/bin:/sbin
amgpgcrypt sets GNUPGHOME to $AMANDA_HOME/.gnupg where gpg will look for the gpg keys. amgpgcrypt uses the public key to encrypt the
Amanda data and uses the private key to decrypt the Amanda backup data. Thus, passphrase is only required at the time of data restore.
KEY AND PASSPHRASE
amgpgcrypt uses the private key to decrypt Amanda backup data.
It is very important to store, manage and protect the key and the passphrase properly. Encrypted backup data can only be recovered with
the correct key and passphrase.
HOW TO CREATE ENCRYPTION KEYS AND PASSPHRASE FOR AMGPGCRYPT
Store the passphrase that you used in following "gpg --gen-key" command inside the home-directory of the AMANDA-user($amanda_user) and
protect it with proper permissions:
echo my_secret_passphrase > ~$amanda_user/.am_passphrase
chown $amanda_user:disk ~$amanda_user/.am_passphrase
chmod 700 ~$amanda_user/.am_passphrase
Run "gpg --gen-key". Below is an example:
$ gpg --gen-key
gpg (GnuPG) 1.2.6; Copyright (C) 2004 Free Software Foundation, Inc.
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it
under certain conditions. See the file COPYING for details.
Please select what kind of key you want:
(1) DSA and ElGamal (default)
(2) DSA (sign only)
(4) RSA (sign only)
Your selection? 1
DSA keypair will have 1024 bits.
About to generate a new ELG-E keypair.
minimum keysize is 768 bits
default keysize is 1024 bits
highest suggested keysize is 2048 bits
What keysize do you want? (1024)
Requested keysize is 1024 bits
Please specify how long the key should be valid.
0 = key does not expire
(n) = key expires in n days
(n)w = key expires in n weeks
(n)m = key expires in n months
(n)y = key expires in n years
Key is valid for? (0) 6m
Key expires at Sun 06 Aug 2006 03:51:25 PM PDT
Is this correct (y/n)? y
You need a User-ID to identify your key; the software constructs the user id
from Real Name, Comment and Email Address in this form:
"Heinrich Heine (Der Dichter) (heinrichh@duesseldorf.de)"
Real name: amandabackup
Email address:
Comment: gpg keys for amandabackup
You selected this USER-ID:
"amandabackup (gpg keys for amandabackup)"
Change (N)ame, (C)omment, (E)mail or (O)kay/(Q)uit? o
You need a Passphrase to protect your secret key.
We need to generate a lot of random bytes. It is a good idea to perform
some other action (type on the keyboard, move the mouse, utilize the
disks) during the prime generation; this gives the random number
generator a better chance to gain enough entropy.
We need to generate a lot of random bytes. It is a good idea to perform
some other action (type on the keyboard, move the mouse, utilize the
disks) during the prime generation; this gives the random number
generator a better chance to gain enough entropy.
public and secret key created and signed.
key marked as ultimately trusted.
pub 1024D/4417A8CB 2006-02-07 amandabackup (gpg keys for amandabackup)
Key fingerprint = 139C 6369 44FC 7F1A 655C E5E9 7EAA 515A 4417 A8CB
sub 1024g/8C3A6A78 2006-02-07 [expires: 2006-08-06]
FILES
$AMANDA_HOME/.gnupg/pubring.gpg
The public key. amgpgcrypt encrypt data with this public key along with the cipher algorithm.
$AMANDA_HOME/.gnupg/secring.gpg
The private/secret key. It's only needed during amrecover/amrestore. Store and protect it properly during other time.
$AMANDA_HOME/.am_passphrase
The passphrase. It's only needed during amrecover/amrestore. Store and protect it properly during other time.
BUGS
Amanda has problem with gpg mdc(modification detection code) in the binary mode. amgpgcrypt calls gpg with mdc disabled
SEE ALSO
amanda(8), amanda.conf(5), amcrypt(8), amrestore(8), gpg(1)
The Amanda Wiki: : http://wiki.zmanda.com/
AUTHOR
Kevin Till <kevin.till@zmanda.com>
Zmanda, Inc. (http://www.zmanda.com)
Amanda 3.3.1 02/21/2012 AMGPGCRYPT(8)