nopasswd

#!/usr/bin/env bash
export PS4='+(${BASH_SOURCE}:${LINENO}): ${FUNCNAME[0]:+${FUNCNAME[0]}(): }'
# Some functions to make the below more readable
INITLOG=/sbin/initlog
KEYGEN=/usr/bin/ssh-keygen
#DSA_KEY=/etc/ssh/ssh_host_dsa_key
DSA_KEY=~/.ssh/id_dsa
PUBFILE=~/.ssh/id_dsa.pub;
AUTHFILE=~/.ssh/authorized_keys;

echo_success() {
  [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
  echo -n "[  "
  [ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS
  echo -n $"OK"
  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  echo -n "  ]"
  echo -ne "\r"
  return 0
}

echo_failure() {
  [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
  echo -n "["
  [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
  echo -n $"FAILED"
  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  echo -n "]"
  echo -ne "\r"
  return 1
}

echo_warning() {
  [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
  echo -n "["
  [ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
  echo -n $"WARNING"
  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  echo -n "]"
  echo -ne "\r"
  return 1
}

# returns OK if $1 contains $2
strstr() {
  [ "${1#*$2*}" = "$1" ] && return 1
  return 0
}

# Read in our configuration
if [ -z "${BOOTUP:-}" ]; then
  if [ -f /etc/sysconfig/init ]; then
      . /etc/sysconfig/init
  else
    # This all seem confusing? Look in /etc/sysconfig/init,
    # or in /usr/doc/initscripts-*/sysconfig.txt
    BOOTUP=color
    RES_COL=60
    MOVE_TO_COL="echo -en \\033[${RES_COL}G"
    SETCOLOR_SUCCESS="echo -en \\033[1;32m"
    SETCOLOR_FAILURE="echo -en \\033[1;31m"
    SETCOLOR_WARNING="echo -en \\033[1;33m"
    SETCOLOR_NORMAL="echo -en \\033[0;39m"
    LOGLEVEL=1
  fi
  if [ "$CONSOLETYPE" = "serial" ]; then
      BOOTUP=serial
      MOVE_TO_COL=
      SETCOLOR_SUCCESS=
      SETCOLOR_FAILURE=
      SETCOLOR_WARNING=
      SETCOLOR_NORMAL=
  fi
fi

if [ "${BOOTUP:-}" != "verbose" ]; then
   INITLOG_ARGS="-q"
else
   INITLOG_ARGS=
fi

# Log that something succeeded
success() {
  if [ -z "${IN_INITLOG:-}" ]; then
     $INITLOG $INITLOG_ARGS -n $0 -s "$1" -e 1
  else
     # silly hack to avoid EPIPE killing rc.sysinit
     trap "" SIGPIPE
     echo "$INITLOG_ARGS -n $0 -s \"$1\" -e 1" >&21
     trap - SIGPIPE
  fi
  [ "$BOOTUP" != "verbose" -a -z "$LSB" ] && echo_success
  return 0
}

# Log that something failed
failure() {
  rc=$?
  if [ -z "${IN_INITLOG:-}" ]; then
     $INITLOG $INITLOG_ARGS -n $0 -s "$1" -e 2
  else
     trap "" SIGPIPE
     echo "$INITLOG_ARGS -n $0 -s \"$1\" -e 2" >&21
     trap - SIGPIPE
  fi
  [ "$BOOTUP" != "verbose" -a -z "$LSB" ] && echo_failure
  [ -x /usr/bin/rhgb-client ] && /usr/bin/rhgb-client --details=yes
  return $rc
}

do_dsa_keygen() {
    if [ ! -s $DSA_KEY ]; then
		echo -n $"Generating SSH2 DSA host key: "
		if $KEYGEN -q -t dsa -f $DSA_KEY -C '' -N '' >&/dev/null; then
			chmod 600 $DSA_KEY
			chmod 644 $DSA_KEY.pub
			if [ -x /sbin/restorecon ]; then
			    /sbin/restorecon $DSA_KEY.pub
			fi
			success $"DSA key generation"
			echo
		else
			failure $"DSA key generation"
			echo
			exit 1
		fi
    else
        echo -n "DSA key existed: ";
        success
        echo
	fi
}

scp_ssh_authfile() {
    #echo "$DSA_KEY.pub $1@$2:~/";
    echo -n $"scp ${PUBFILE##*/} file: ";
    scp $PUBFILE $1@$2:~/ >/dev/null 2>&1;
    # ssh $1@$2 "touch ~/.ssh/authorized_keys; cat ~/id_dsa.pub >> ~/.ssh/authorized_keys; chmod 645 ~/.ssh/authorized_keys; exit";
    if [ $? -eq 0 ]; then 
        success $"scp $PUBFILE sucessed.";
        echo
        # echo "touch $PUBFILE; cat ~/id_dsa.pub >> $AUTHFILE; chmod 644 $AUTHFILE; exit";
        ssh $1@$2 "touch $PUBFILE; cat ~/id_dsa.pub >> $AUTHFILE; chmod 644 $AUTHFILE; exit";
        
        if [ $? -eq 0 ]; then
            echo -n $"setup no password ssh:";
            success $"setup no password ssh.";
            echo
        else
            echo -n $"setup no password ssh:";
            failure $"setup no password ssh.";
            echo
            exit;
        fi
    else
        failure $"scp $PUBFILE failed.";
        echo
        exit;
    fi
}

if [ $# -ne 1 ]; then 
    echo "Usage: $0 host [user]";
    exit;
fi

if [ -z $2 ]; then
    user=`whoami`;
else
    user=$2;
fi

do_dsa_keygen
scp_ssh_authfile $user $1