1#!/bin/sh 2# 3# usage: onetimekey path/to/mycert.pem 4# onetimekey -certonly path/to/mycert.pem 5# 6# Takes an openssl cert+key pem file and turns into a long string 7# for the x11vnc SSL VNC Java Viewer. 8# 9# The Java applet URL parameter can be oneTimeKey=<str> where str is 10# the output of this program, or can be oneTimeKey=PROMPT in which 11# case the applet will ask you to paste in the string. 12# 13# The problem trying to be solved here is it is difficult to get 14# the Java applet to have or use a keystore with the key saved 15# in it. Also, as the name implies, an HTTPS server can create 16# a one time key to send to the applet (the user has already 17# logged in via password to the HTTPS server). 18# 19# Note oneTimeKey is to provide a CLIENT Certificate for the viewer 20# to authenticate itself to the VNC Server. 21# 22# There is also the serverCert=<str> Applet parameter. This is 23# a cert to authenticate the VNC server against. To create that 24# string with this tool specify -certonly as the first argument. 25 26certonly="" 27if [ "X$1" = "X-certonly" ]; then 28 shift 29 certonly=1 30fi 31 32in=$1 33der=/tmp/1time$$.der 34touch $der 35chmod 600 $der 36 37openssl pkcs8 -topk8 -nocrypt -in "$in" -out "$der" -outform der 38 39pbinhex=/tmp/pbinhex.$$ 40cat > $pbinhex <<END 41#!/usr/bin/perl 42 43\$str = ''; 44while (1) { 45 \$c = getc(STDIN); 46 last if \$c eq ''; 47 \$str .= sprintf("%02x", unpack("C", \$c)); 48} 49 50print "\$str\n"; 51END 52 53chmod 700 $pbinhex 54 55str1=`$pbinhex < "$der"` 56rm -f "$der" 57 58n=`grep -n 'BEGIN CERTIFICATE' $in | awk -F: '{print $1}' | head -1` 59str2=`tail +$n $in | $pbinhex` 60if [ "X$certonly" = "X1" ]; then 61 echo "$str2" 62else 63 echo "$str1,$str2" 64fi 65rm -f $pbinhex 66