#!/bin/bash

psw=false

while ! $psw
 do
 ans=$(dialog --ok-label "Submit" \
  --backtitle "One Button Installer - Create Password" \
  --title "Create password" --insecure \
  --passwordform "Arrow down for 'Repeat password', TAB for 'Submit'" \
 0 0 0 \
 "Create new password:" 1 1 "" 2 1 64 0 \
 "Repeat the password:" 3 1 "" 4 1 64 0 \
 3>&1 1>&2 2>&3 3>&- )

# These are several commented debug outputs, that you might remove

# echo "$ans"
 fpsw=$(mktemp)
# echo "$fpsw"

 echo "$ans" > "$fpsw"
# cat "$fpsw"
 for i in 1 2
 do
  read "psw$i"
 done < "$fpsw"

# echo "psw1=$psw1"
# echo "psw2=$psw2"

 if [ ${#psw1} -lt 6 ]; then
  echo "too short password, use at least 6 characters"
  read -n1 -t3
  psw=false
 elif [ "$psw1" == "$psw2" ]; then
  echo "the password entries match, go ahead ..."
  psw=true
 else
  echo "the passwords do not match, try again"
  read -n1 -t3
  psw=false
 fi
done

# use psw1 here ...

#echo "psw1=$psw1"

# clean up

shred "$fpsw"
psw1=\
'                                                                '
psw2=$psw1
ans="$psw1 $psw2"
#less "$fpsw"
#echo "psw1=$psw1"
#echo "psw2=$psw2"
#echo "ans=$ans"

unset psw1 psw2 ans
#echo "psw1=$psw1"
#echo "psw2=$psw2"
#echo "ans=$ans"
rm "$fpsw"