#!/bin/sh
#
#     tiger - A UN*X security checking system
#     Copyright (C) 1993 Douglas Lee Schales, David K. Hess, David R. Safford
#
#    This program is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 2, or (at your option)
#    any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#     Please see the file `COPYING' for the complete copyright notice.
#
# check_netrc - 06/14/93
#
# Checks if users's netrc files are insecurely configured. This includes
# complaining if users hold netrc files or if they are a a symbolic link
# or directory.
#
# 11/21/2004 jfs Quoted homedir usage
# 08/14/2003 jfs Added OUTPUTMETHOD to dependancies
# 08/08/2003 jfs Improved temporary file creation.
# 07/25/2002 jfs Added a sanity check for password files
# 04/28/93 dls  Added '-L' option to 'ls' to get the permissions from the
#               file instead of the symbolic link.
#
#-----------------------------------------------------------------------------
#
TigerInstallDir="/usr/share/tiger"

#
# Set default base directory.
# Order or preference:
#      -B option
#      TIGERHOMEDIR environment variable
#      TigerInstallDir installed location
#
basedir=${TIGERHOMEDIR:=$TigerInstallDir}

for parm
do
   case $parm in
   -B) basedir=$2; break;;
   esac
done

#
# Verify that a config file exists there, and if it does
# source it.
#
[ ! -r $basedir/config ] && {
  echo "--ERROR-- [init002e] No 'config' file in \`$basedir'."
  exit 1
}

. $basedir/config

. $BASEDIR/initdefs
#
# If run in test mode (-t) this will verify that all required
# elements are set.
#
[ "$Tiger_TESTMODE" = 'Y' ] && {
  haveallcmds AWK CAT GEN_PASSWD_SETS JOIN LS RM OUTPUTMETHOD || exit 1
  haveallfiles BASEDIR WORKDIR || exit 1
  haveallvars TESTLINK HOSTNAME || exit 1
  
  echo "--CONFIG-- [init003c] $0: Configuration ok..."
  exit 0
}

#------------------------------------------------------------------------
echo
echo "# Performing check of .netrc files..."

haveallcmds AWK CAT GEN_PASSWD_SETS JOIN LS RM OUTPUTMETHOD || exit 1
haveallfiles BASEDIR WORKDIR || exit 1

safe_temp "$WORKDIR/pass.list.$$" "$WORKDIR/home.hosts.$$"
trap 'delete $WORKDIR/pass.list.$$ $WORKDIR/home.hosts.$$ ; exit 1' 1 2 3 15

check_file()
{
  user=$1
  file=$2
  
  $AWK '
   BEGIN  {
           LINE="";
          }
   /[ \t]*machine/ {
           print LINE;
           LINE="$0";
          }
          {
           LINE=LINE " " $0;
          }
   END    {
           print LINE;
          }
   ' < $file |
  $AWK '
   BEGIN  {
           BAD=0;
          }
          {
           username="";
           password="";
           for(i=0;i<NF;i++){
              if($i == "login"){
                  i++;
                  username=$i;
              }
              else if($i == "password"){
                  i++;
                  password=$i;
              }
           }
           if(username != "ftp" && username != "anonymous" && username != "")
               if(password != "")
                    BAD=1;
          }
   END    {
           if(BAD == 1)
             exit 1;
           else
             exit 0;
          }
  ' || {
    getpermit $file | {
      read _f owner group ur uw ux gr gw gx or ow ox suid sgid stk
      if [ "$gr$or" != "00" ]; then
	message FAIL nrc001f "" "User $user's .netrc file is readable and contains passwords for non-anonymous ftp accounts."
      else
	message WARN nrc002w "" "User $user's .netrc file contains passwords for non-anonymous ftp accounts."
      fi
    }
  }
}

process_passwd()
{
  while read user homedir host
  do
    [ "$host" = "$HOSTNAME" -a -r "$homedir/.netrc" ] && {
      if [ $TESTLINK "$homedir/.netrc" ]; then
	message WARN nrc003w "" "User $user's .netrc file is a symbolic link:"
	$LS -l "$homedir/.netrc"
	$LS $LSGROUP $LSLINK "$homedir/.netrc"
	[ -s $homedir/.netrc ] && 
	  check_file $user "$homedir/.netrc"
      elif [ -d "$homedir/.netrc" ]; then
	message ALERT nrc004a "" "User $user's .netrc file is a directory:"
	$LS $LSGROUP -Rla "$homedir/.netrc"
	echo
      else
	message WARN nrc005w "" "User $user has a .netrc file"
	check_file $user "$homedir/.netrc"
      fi
    }
  done
}

saveifs="$IFS"

{
  if [ -n "$Tiger_PasswdFiles" ]; then
    [ -f $Tiger_PasswdFiles ] && $CAT "$Tiger_PasswdFiles" > $WORKDIR/pass.list.$$
  else
    $GEN_PASSWD_SETS $WORKDIR/pass.list.$$
  fi
}

[ -r $WORKDIR/pass.list.$$ ] && {
while read passwd_set
do
  echo
  echo "# Checking accounts from `$CAT $passwd_set.src`..."

  $AWK -F: '{print $1, $6}' $passwd_set |
  $BASEDIR/util/${GETFSHOST:=getfs-std} > $WORKDIR/home.hosts.$$

  $AWK -F: '{printf("%s %s\n", $1, $6); }' $passwd_set |
  $JOIN -o 1.1 1.2 2.3 - $WORKDIR/home.hosts.$$ |
  process_passwd
  
  [ ! -n "$Tiger_PasswdFiles" ] && delete $passwd_set $passwd_set.src
  delete $WORKDIR/home.hosts.$$
done < $WORKDIR/pass.list.$$ |
$OUTPUTMETHOD
}

delete $WORKDIR/pass.list.$$
#
exit 0
