programs/_keycensor/_keycensor.in

   1 #! /bin/sh
   2 # implements key censoring for barf
   3 # Copyright (C) 1999, 2002  Henry Spencer.
   4 #
   5 # This program is free software; you can redistribute it and/or modify it
   6 # under the terms of the GNU General Public License as published by the
   7 # Free Software Foundation; either version 2 of the License, or (at your
   8 # option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
   9 #
  10 # This program is distributed in the hope that it will be useful, but
  11 # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12 # or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13 # for more details.
  14 #
  15 # RCSID $Id: _keycensor.in,v 1.1 2004/03/15 20:35:27 as Exp $
  16
  17 usage="Usage: $0 [file ...]"
  18 me="ipsec _keycensor"
  19
  20 for dummy
  21 do
  22         case "$1" in
  23         --help)         echo "$usage" ; exit 0  ;;
  24         --version)      echo "$me $IPSEC_VERSION" ; exit 0              ;;
  25         --)             shift ; break           ;;
  26         -*)             echo "$0: unknown option \`$1'" >&2 ; exit 2    ;;
  27         *)              break                   ;;
  28         esac
  29         shift
  30 done
  31
  32 awk '   /(sig|enc|auth)key[ \t]*=[ \t]*[^%]/ {
  33                 i = match($0, /key[ \t]*=[ \t]*/)
  34                 i += RLENGTH
  35                 cold = substr($0, 1, i-1)
  36                 hot = substr($0, i)
  37                 sub(/[ \t]+(#.*)?$/, "", hot)
  38                 q = "'"'"'"     # single quote
  39                 if (hot ~ q)
  40                         cooled = "[cannot be condensed]"
  41                 else if (hot ~ /^0s/)
  42                         cooled = "[keyid " substr(hot, 3, 9) "]"
  43                 else {
  44                         run = "echo " q hot q " | md5sum"
  45                         run | getline
  46                         close(run)
  47                         cooled = "[sums to " substr($1, 1, 4) "...]"
  48                 }
  49                 print cold cooled
  50                 next
  51         }
  52         { print }' $*