#!/opt/perl5/bin/perl -w
use strict;
use Fcntl qw (:flock);
use Term::ReadKey;
use Crypt::CBC;
my $pass_file="passfile.txt";
my %Mgrs;
my $user=shift;
if($user eq "KEY"){die"Can't change that!!!!\n";}

open(FH,"$pass_file")|| &ERR("Unable to read password file");
flock(FH,LOCK_EX);
while(<FH>){
  my($mgr,$passwd,$printer) = split /\|/;
  chomp $printer;
  $Mgrs{$mgr}=[$passwd,$printer];
}
flock(FH,LOCK_UN);
close FH;

my $ck=$Mgrs{'KEY'}[0];

#debug
#print"CK is $ck\n";

if(exists $Mgrs{$user}){
  if($Mgrs{$user}[0] eq ""){
    &newpass;
  }else{
    & ERR("Incorrect username");
  }
}else{
  & ERR("Non-Existent User");
}
sub ERR{
  my $msg=shift;
  print "$msg\n";
  die;
}

sub newpass{
  print"Enter new password: ";
  ReadMode 2;
  my $p1=<STDIN>;
  chomp $p1;
  ReadMode 0;
  print "\nEnter it again (for verification): ";
  ReadMode 2;
  my $p2=<STDIN>;
  chomp $p2;
  ReadMode 0;
  print"\n";
  my $crypt=Crypt::CBC->new({'key'=>$ck,'cipher'=>'Blowfish'});
  my $d1=$crypt->encrypt_hex($p1);
  #Debug 
  #print "$d1\n";
  my $d2=$crypt->encrypt_hex($p2);
  #Debug 
  #print "$d2\n";
  if($d1 eq $d2){ $Mgrs{$user}[0]= $d1; }else{
    &ERR("Non matching passwords.");
  }
}