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Full Discussion: Encrypt password but use * when typing password
Top Forums Shell Programming and Scripting Encrypt password but use * when typing password Post 302535305 by dbashyam on Thursday 30th of June 2011 11:15:47 AM
Old 06-30-2011
Encrypt password but use * when typing password
Hi,

I came across the following script for encrypting the password in this forum
Code:
#! /usr/bin/ksh
exec 4>/dev/tty
function getpass
{
        typeset prompt=$1
        typeset backspace=$(echo  \\b\\c)
        typeset enter=$(echo \\r\\c)
        typeset savesetting=$(stty -g)
        typeset keystroke password n i reading result
        n=0
        echo "${prompt}"\\c >&4
        stty -echo -icrnl -icanon min 1 time 0
        reading=1
        while ((reading)) ; do
                keystroke=$(dd bs=1 count=1 2>/dev/null)
                case $keystroke in
                $enter)
                        reading=0
                        ;;
                $backspace)
                        if ((n)) ; then
                                echo "${backspace} ${backspace}"\\c >&4
                                ((n=n-1))
                        fi
                        ;;
                *)
                        echo \*\\c >&4
                        data[n]=$keystroke
                        ((n=n+1))
                esac
        done
        stty "$savesetting"
        echo >&4
        result=""
        i=0
        while  ((i<n)) ; do
                result="${result}${data[i]}"
                ((i=i+1))
        done
        echo $result
        return 0
}
final=$(getpass "password:")
echo the password is $final
exit 0

I copied the script and executed it. I executed in RHEL. But this script outputs as given below:

Code:
[root@netcool ncoadmin]# ./a.sh
password:\c
*\c
*\c
*\c
*\c
*\c
*\c

I was expecting I should get something like this

password: ********

meaning whatever the password I type it should be in asterix. But this script keeps on moving down when I press a single character.

Can someone help me in this regard.

Thanks
Dinesh
 

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LEARN ABOUT PHP

httppower

httppower(8)							     powerman							      httppower(8)

NAME

       httppower - communicate with HTTP based power distribution units

SYNOPSIS

       httppower [--url URL]

DESCRIPTION

       httppower  is  a  helper program for powerman which enables it to communicate with HTTP based power distribution units.	It is run interac-
       tively by the powerman daemon.

OPTIONS

       -u, --url URL
	      Set the base URL.

INTERACTIVE COMMANDS

       The following commands are accepted at the httppower> prompt:

       auth user:pass
	      Authenticate to the base URL with specified user and password, using ``basic'' HTTP authentication which sends the user and password
	      over the network in plain text.

       seturl URL
	      Set the base URL.  Overrides the command line option.

       get [URL-suffix]
	      Send an HTTP GET to the base URL with the optional URL-suffix appended.

       post [URL-suffix] key=val[&key=val]...
	      Send an HTTP POST to the base URL with the optional URL-suffix appended, and key-value pairs as argument.

FILES

       /usr/sbin/httppower
       /etc/powerman/powerman.conf

ORIGIN

       PowerMan was originally developed by Andrew Uselton on LLNL's Linux clusters.  This software is open source and distributed under the terms
       of the GNU GPL.

SEE ALSO

       powerman(1), powermand(8), httppower(8), plmpower(8), vpcd(8), powerman.conf(5), powerman.dev(5), powerman-devices(7).

       http://sourceforge.net/projects/powerman

powerman-2.3.5							    2009-02-09							      httppower(8)
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