plc.d/ssl

   1 #!/bin/bash
   2 #
   3 # priority: 400
   4 #
   5 # Generate SSL certificates
   6 #
   7 # Mark Huang <mlhuang@cs.princeton.edu>
   8 # Copyright (C) 2006 The Trustees of Princeton University
   9 #
  10 # $Id: ssl,v 1.10 2006/07/24 19:30:45 mlhuang Exp $
  11 #
  12
  13 # Source function library and configuration
  14 . /etc/plc.d/functions
  15 . /etc/planetlab/plc_config
  16
  17 # Be verbose
  18 set -x
  19
  20 # Print the CNAME of an SSL certificate
  21 ssl_cname ()
  22 {
  23     openssl x509 -noout -in $1 -subject | \
  24         sed -n -e 's@.*/CN=\([^/]*\).*@\1@p'
  25 }
  26
  27 # Print the emailAddress of an SSL certificate
  28 ssl_email ()
  29 {
  30     openssl x509 -noout -in $1 -subject | \
  31         sed -n -e 's@.*/emailAddress=\([^/]*\).*@\1@p'
  32 }
  33
  34 # Verify a certificate. If invalid, generate a new self-signed
  35 # certificate.
  36 verify_or_generate_certificate() {
  37     crt=$1
  38     key=$2
  39     ca=$3
  40     cname=$4
  41     email=$5
  42
  43     # If the CA certificate does not exist, assume that the
  44     # certificate is self-signed.
  45     if [ ! -f $ca ] ; then
  46         cp -a $crt $ca
  47     fi
  48
  49     if [ -f $crt ] ; then
  50         # Check if certificate is valid
  51         verify=$(openssl verify -CAfile $ca $crt)
  52         # Delete if invalid or if the subject has changed
  53         if grep -q "error" <<<$verify || \
  54             [ "$(ssl_cname $crt)" != "$cname" ] || \
  55             [ "$(ssl_email $crt)" != "$email" ] ; then
  56             rm -f $crt $ca
  57         fi
  58     fi
  59
  60     if [ ! -f $crt ] ; then
  61         # Set subject
  62         subj=
  63         if [ -n "$cname" ] ; then
  64             subj="$subj/CN=$cname"
  65         fi
  66         if [ -n "$email" ] ; then
  67             subj="$subj/emailAddress=$email"
  68         fi
  69
  70         # Generate new self-signed certificate
  71         mkdir -p $(dirname $crt)
  72         openssl req -new -x509 -days 3650 -set_serial $RANDOM \
  73             -batch -subj "$subj" \
  74             -nodes -keyout $key -out $crt
  75         check
  76         chmod 644 $crt
  77
  78         # The certificate it self-signed, so it is its own CA
  79         cp -a $crt $ca
  80     fi
  81 }
  82
  83 case "$1" in
  84     start)
  85         MESSAGE=$"Generating SSL certificates"
  86         dialog "$MESSAGE"
  87
  88         # Generate HTTPS certificates if necessary. We generate a
  89         # certificate for each enabled server with a different
  90         # hostname. These self-signed certificates may be overridden
  91         # later.
  92         for server in WWW API BOOT ; do
  93             ssl_key=PLC_${server}_SSL_KEY
  94             ssl_crt=PLC_${server}_SSL_CRT
  95             ca_ssl_crt=PLC_${server}_CA_SSL_CRT
  96             hostname=PLC_${server}_HOST
  97
  98             # Check if we have already generated a certificate for
  99             # the same hostname.
 100             for previous_server in WWW API BOOT ; do
 101                 if [ "$server" = "$previous_server" ] ; then
 102                     break
 103                 fi
 104                 previous_ssl_key=PLC_${previous_server}_SSL_KEY
 105                 previous_ssl_crt=PLC_${previous_server}_SSL_CRT
 106                 previous_ca_ssl_crt=PLC_${previous_server}_CA_SSL_CRT
 107                 previous_hostname=PLC_${previous_server}_HOST
 108
 109                 if [ -f ${!previous_ssl_crt} ] && \
 110                     [ "$(ssl_cname ${!previous_ssl_crt})" = "${!hostname}" ] ; then
 111                     cp -a ${!previous_ssl_key} ${!ssl_key}
 112                     cp -a ${!previous_ssl_crt} ${!ssl_crt}
 113                     cp -a ${!previous_ca_ssl_crt} ${!ca_ssl_crt}
 114                     break
 115                 fi
 116             done
 117
 118             verify_or_generate_certificate \
 119                 ${!ssl_crt} ${!ssl_key} ${!ca_ssl_crt} \
 120                 ${!hostname}
 121         done
 122
 123         # Install HTTPS certificates into both /etc/pki (Fedora Core
 124         # 4) and /etc/httpd/conf (Fedora Core 2). If the API, boot,
 125         # and web servers are all running on the same machine, the web
 126         # server certificate takes precedence.
 127         for server in API BOOT WWW ; do
 128             enabled=PLC_${server}_ENABLED
 129             if [ "${!enabled}" != "1" ] ; then
 130                 continue
 131             fi
 132             ssl_key=PLC_${server}_SSL_KEY
 133             ssl_crt=PLC_${server}_SSL_CRT
 134
 135             symlink ${!ssl_crt} /etc/pki/tls/certs/localhost.crt
 136             symlink ${!ssl_key} /etc/pki/tls/private/localhost.key
 137             symlink ${!ssl_crt} /etc/httpd/conf/ssl.crt/server.crt
 138             symlink ${!ssl_key} /etc/httpd/conf/ssl.key/server.key
 139         done
 140
 141         result "$MESSAGE"
 142         ;;
 143 esac
 144
 145 exit $ERRORS