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Diff for /loncom/pwchange between versions 1.1 and 1.8

version 1.1, 2001/10/23 03:43:02 version 1.8, 2002/09/19 02:02:59
Line 1 Line 1
 #!/usr/bin/perl  #!/usr/bin/perl
   
   # The Learning Online Network with CAPA
   #
   # pwchange - setuid script to change unix passwords
   #
   # YEAR=2001
   # 10/23,11/13,11/15 Scott Harrison
   #
   # YEAR=2002
   # 02/19 Matthew Hall
   #
   # $Id$
   ###
   
 use strict;  use strict;
   my $noprint = 1;
   
   
   
   print "In pwchange\n" unless $noprint;
   print "Real uid = $< effective uid = $> \n" unless $noprint;
   # ------------------------------------------------------------------ Untainting
 $ENV{'PATH'}='/bin:/usr/bin'; # Nullify path information.  $ENV{'PATH'}='/bin:/usr/bin'; # Nullify path information.
 $ENV{'BASH_ENV'}=''; # Nullify shell environment information.  delete @ENV{qw(IFS CDPATH ENV BASH_ENV)}; # nullify potential taints
   
   # ---------------------------- Make sure this process is running from user=root
   
   if (0 != $<) {
       print "Username not root" unless $noprint;
      exit 1;
   }
   # ----------------------------------------------- If not running setuid as root
 if ($>!=0) {  if ($>!=0) {
       print "Not setuid to root" unless $noprint;
     exit 1;      exit 1;
 }  }
   
   # ----------------------------------------------- Make sure arguments are valid
 my $user=shift @ARGV;  my $user=shift @ARGV;
 $user=~/^(\w+)$/;  $user=~/^(\w+)$/;
 my $safe=$1;  my $safe=$1;
   print "Save user = $safe" unless $noprint;
   
 my $pword=<>;  my $pword=<>;
 chomp $pword;  chomp $pword;
 unless (length($safe) and ($user eq $safe) and ($safe=~/^[A-Za-z]/)) {  unless (length($safe) and ($user eq $safe) and ($safe=~/^[A-Za-z]/)) {
     exit 2;      exit 2;
 }  }
   print "Password = $pword" unless $noprint;
 my $pbad=0;  my $pbad=0;
 map {if (($_<32)&&($_>126)){$pbad=1;}} (split(//,$pword));  foreach (split(//,$pword)) {if ((ord($_)<32)||(ord($_)>126)){$pbad=1;}} 
 exit 3 if $pbad;  exit 3 if $pbad;
   
   # --------------------------------------------------------- Call system command
 open OUT,"|passwd --stdin $safe >/dev/null";  open OUT,"|passwd --stdin $safe >/dev/null";
 print OUT $pword;  print OUT $pword;
 print OUT "\n";  print OUT "\n";
 close OUT;  close OUT;
   
   # --------------------------------------- exit with status of command execution
 exit $?/256;  exit $?/256;
   
   =head1 NAME
   
   pwchange - setuid script to change unix passwords
   
   =head1 DESCRIPTION
   
   Setuid script to change unix passwords.
   
   =head1 README
   
   Setuid script to change unix passwords.
   
   =head1 PREREQUISITES
   
   =head1 COREQUISITES
   
   =pod OSNAMES
   
   linux
   
   =pod SCRIPT CATEGORIES
   
   LONCAPA/Administrative
   
   =cut
Removed from v.1.1  
changed lines
  Added in v.1.8

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