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Full Discussion: Problem in expect script with password involving trailing backslash
Top Forums Shell Programming and Scripting Problem in expect script with password involving trailing backslash Post 302327178 by pradeeptyagi23 on Saturday 20th of June 2009 12:47:13 AM
Old 06-20-2009
Error Problem in expect script with password involving trailing backslash
Hi all,
I have wriiten an expect script that genearates a public private key pair through ssh-keygen and then copies that key to the authorized keys file of the remote system . The problem i am facing is when i get a password for the remote machine containg a trailing backslash , the send command in expect fails to perform its function.
The expect script is as follows :
NOTE : I am passing the credentials such as password , username etc. through commandline, The password is the 5th command line argument to the script

Code:
#! /bin/sh
set $*
EXPECT_BIN=`which expect`
$EXPECT_BIN <<EOF
set timeout -1
spawn ssh-keygen -t dsa 
expect "Enter file in which to save the key (/root/.ssh/id_dsa):"
send "$KEY_FILE_PATH\r"
expect "/root/.ssh/id_dsa already exists."
expect "Overwrite (y/n)?"
send "y\r"
expect "Enter passphrase (empty for no passphrase):"
send "$PASS_PHRASE\r"
expect "Enter same passphrase again:"
send "$PASS_PHRASE\r"
expect ">"
spawn $7 $6 $3 $4
expect "$3@$4's password:"
send "$5\r"
expect ">"
send "bye\r"
EOF

I would be glad if i can get a solution for this as soon as possible
Thanks
Last edited by radoulov; 06-20-2009 at 03:19 AM.. Reason: added code tags
 

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LEARN ABOUT DEBIAN

astgenkey

ASTGENKEY(8)						     Linux Programmer's Manual						      ASTGENKEY(8)

NAME

       astgenkey - generates keys for for Asterisk IAX2 RSA authentication

SYNOPSIS

       astgenkey [ -q ] [ -n ] [ keyname ]

DESCRIPTION

       astgenkey  This	script	generates  an RSA private and public key pair in PEM format for use by Asterisk.  The private key should be kept a
       secret, as it can be used to fake your system's identity.  Thus by default (without the option -n ) the script will  create  a  passphrase-
       encrypted copy of your secret key: without entering the passphrase you won't be able to use it.

       However	if  you want to use such a key with Asterisk, you'll have to start it interactively, because the scripts that start asterisk can't
       use that encrypted key.

       The key is identified by a name. If you don't write the name on the command-line you'll be prompted for one. The outputs of the script are:

       name.pub
	      The public key: not secret. Send this to the other side.

       name.key
	      The private key: secret.

       Those files should be copied to /var/lib/asterisk/keys

       (The private key: on your system. The public key: on other systems)

       To see the currently-installed keys from the asterisk CLI, use the command

	      show keys

OPTIONS

       -q
	      Run quietly.

       -n
	      Don't encrypt the private key.

SECURITY

       The keys are created, using the umask of the user running the command.  To create the keys in a secure manner, you should check	to  ensure
       that your umask is first set to disallow the private key from being world- readable, such as with the following commands:

       umask 0066

       astgenkey yourkey

       And then make the key accessible to Asterisk (assuming you run it as user "asterisk").

	 chown asterisk /var/lib/asterisk/keys/yourname.*

FILES

       /var/lib/asterisk/keys

SEE ALSO

       asterisk(8), genrsa(1), rsa(1),

       http://www.voip-info.org/wiki-Asterisk+iax+rsa+auth

AUTHOR

       This manual page was written by Tzafrir Cohen <tzafrir.cohen@xorcom.com> Permission is granted to copy, distribute and/or modify this docu-
       ment under the terms of the GNU General Public License, Version 2 any later version published by the Free Software Foundation.

       On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL-2.

Asterisk							  May 14th, 2005						      ASTGENKEY(8)
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