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Full Discussion: Encrypt the password ,source it in a expect script...!!
Top Forums UNIX for Advanced & Expert Users Encrypt the password ,source it in a expect script...!! Post 302412190 by sysgate on Monday 12th of April 2010 03:46:55 AM
Old 04-12-2010
I was going to suggest that second approach, as Corona688 stated - better avoid encrypt/decrypt process, but rather cut down the rights on that machine, in terms of root access, make the file exclusively locked, and keep the password in plain text. Then, whenever a password has to be read by the expect script, chmod the file, temporarily, the script will parse the password, and then lock the file again. Unfortunately, expect/TCL doesn't bring much into security, its first purpose was to be convenient for automation, both local and remote, thus avoiding user interactions. I have a few very handy expect scripts available, but only on test machines with limited access - both virtual and physical.
 

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LEARN ABOUT DEBIAN

srptool

srptool(1)						      General Commands Manual							srptool(1)

NAME

       srptool - Simple SRP password tool

SYNOPSIS

       srptool [options]

DESCRIPTION

       Very simple program that emulates the programs in the Stanford SRP (Secure Remote Password) libraries using GnuTLS.  It is intended for use
       in places where you don't expect SRP authentication to be the used for system users.

       In brief, to use SRP you need to create two files. These are the password file that holds the users and the verifiers associated with  them
       and the configuration file to hold the group parameters (called tpasswd.conf).

OPTIONS

       --bits BITS
	      specify the number of bits for prime numbers (used only when the --create-conf option is used).

       --create-conf FILE
	      Generate a tpasswd.conf file.

       -h, --help
	      Prints a short reminder of the command line options.

       -i, --index INDEX
	      Specify the index of the parameters in tpasswd.conf to use.

       -p, --passwd FILE
	      Specify a password file.

       -c, --passwd-conf FILE
	      Specify a password configuration file.

       -s, --salt SALT
	      Specify salt size for crypt algorithm.

       -u, --username username
	      Specify username.

       --verify
	      Just verify password.

EXAMPLES

       To create tpasswd.conf which holds the g and n values for SRP protocol (generator and a large prime), run:

	      $ srptool --create-conf /etc/tpasswd.conf

       This  command will create /etc/tpasswd and will add user 'test' (you will also be prompted for a password). Verifiers are stored by default
       in the way libsrp expects.

	      $ srptool --passwd /etc/tpasswd 
		  --passwd-conf /etc/tpasswd.conf -u test

       This command will check against a password. If the password matches the one in /etc/tpasswd you will get an ok.

	      $ srptool --passwd /etc/tpasswd 
		  --passwd-conf /etc/tpasswd.conf --verify -u test

AUTHOR

       Nikos Mavrogiannopoulos <nmav@gnutls.org> and others; see /usr/share/doc/gnutls-bin/AUTHORS for a complete list.

       This manual page was written by Ivo Timmermans <ivo@debian.org>, for the Debian GNU/Linux system (but may be used by others).

								February 21st 2005							srptool(1)
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