Autologin Expect scripts for telnet/ssh

Yuri — Sun, 21 Sep 2008 17:28:02 +0000

Tired of typing over and over your username/password when using
telnet/ssh ? Here are Expect http://expect.nist.gov/ scripts to autologin by Telnet and ssh
Notes:
- Yes, it is not secure to keep you username/password saved somewhere, so know
what you do . In my opinion as long as this
is a dedicated for remote logins server, that has no access from outside, and hardened accordingly
(pertinent to the scripts – only owner/root can read user’s home folder, etc.,) the risk is acceptable.

Note 2: password is saved in a file named “sword”

cat tel
#!/usr/local/bin/expect Change to the location of your Expect package

proc Usage {} {
puts “\n tel \n”
return
}

set argnumber [llength $argv]

if {$argnumber==0} {
      puts “You need to specify at least one piece of equipment to log into\n”
      Usage
      exit

   } elseif {$argnumber>1} {
       puts “You specified too many arguments, only one please\n”

      Usage
       exit
                  }

set hostName [lindex $argv 0]

puts “Entering $hostName”
set username “myusername”
set HANDL [open "sword"]
set password [gets $HANDL]
close $HANDL
spawn telnet $hostName
expect {[Uu]sername*} {
send “$username\r”
}

expect {[Pp]assword:} {
send “$password\r”
}

#Cisco specific block – to enter enable level, you may remove this block if not needed
expect {*#} {
send “enable\r” }

expect {[Pp]assword:} {
send “$password\r”
}
#End of Cisco specific block

interact

Now SSH login script
> cat essh
#!/usr/local/bin/expect Change to the location of your Expect package

proc Usage {} {
puts “\n essh \n”
return
}

set argnumber [llength $argv]

if {$argnumber==0} {
      puts “You need to specify at least one piece of equipment to log into\n”
      Usage
      exit

   } elseif {$argnumber>1} {
       puts “You specified too many arguments, only one please\n”

      Usage
       exit
                  }

set hostName [lindex $argv 0]

puts “Entering $hostName”
set username “myusername”
set HANDL [open "sword"]
set password [gets $HANDL]
spawn ssh $hostName

expect {[Pp]assword:} {
send “$password\r”
}

#Again goes Cisco – specific block , remove if not needed
expect {*#} {
send “enable\r” }

expect {[Pp]assword:} {
send “$password\r”
}
#End of Cisco – specific block

interact

yurisk.info » Expect

Autologin Expect scripts for telnet/ssh