SliTaz Repositories

1 #!/bin/sh

2

3 # Optional: check user with a random question

4 file=/usr/share/ajaxterm/questions

5 if [ -s $file -a -r $file ]; then

6 line=1

7 while read md5 question; do

8 [ $(( $(date +%s) % $line )) -ne 0 ] && continue

9 ask_question="$question"

10 ask_md5="$md5"

11 line=$(($line+1))

12 done < $file

13 echo -n "$ask_question "

14 read -t 30 answer

15 [ $ask_md5 == $(echo $answer | md5sum | cut -d\ -f1) ] || exit 1

16 fi

17

18 # Get SSH server

19 server=""

20 if [ -x /usr/bin/ssh -o -x /usr/bin/telnet ]; then

21 echo "Expected format [!][telnet/][user@][host][:port], default local login."

22 echo -n "TELNET/SSH server: "

23 read -t 300 server || exit 1

24 fi

25

26 # No SSH server given ? Try login

27 [ -n "$server" ] || exec /bin/login

28

29 # Allow non default SSH port with format server:port

30 port=""

31 sshport=""

32 case "$server" in

33 *:*) port="${server#*:}"

34 sshport="-p $port"

35 server=${server%:*};;

36 esac

37

38 # heading ! in server name means open remote ssh port with a knock sequence

39 if [ -x /usr/bin/knock ]; then

40 case "$server" in

41 !*) server=${server#*!}

42 echo -n "Knock sequence (port[:proto]...): "

43 read -t 30 sequence && knock ${server#*@} $sequence

44 esac

45 fi

46

47 # Get SSH user if missing

48 case "$server" in

49 */*|*@*) ;;

50 *) echo -n "$server login: "

51 read -t 30 user || exit 1

52 server="$user@$server";;

53 esac

54

55 # Launch OpenSSH or Dropbear

56 sshargs="-oPreferredAuthentications=keyboard-interactive,password -oNoHostAuthenticationForLocalhost=yes -oLogLevel=FATAL -F/dev/null";

57 [ -L /usr/bin/ssh ] && sshargs=""

58 case "$server" in

59 */*) exec ${server%/*} ${server#*/} $port ;;

60 *) exec ssh $sshport $sshargs $server ;;

61 esac