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 1.7 2006/06/28 21:34:18 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 [ -f $crt ] ; then
  44         # Check if certificate is valid
  45         verify=$(openssl verify -CAfile $ca $crt)
  46         # Delete if invalid or if the subject has changed
  47         if grep -q "error" <<<$verify || \
  48             [ "$(ssl_cname $crt)" != "$cname" ] || \
  49             [ "$(ssl_email $crt)" != "$email" ] ; then
  50             rm -f $crt $ca
  51         fi
  52     fi
  53
  54     if [ ! -f $crt ] ; then
  55         # Set subject
  56         subj=
  57         if [ -n "$cname" ] ; then
  58             subj="$subj/CN=$cname"
  59         fi
  60         if [ -n "$email" ] ; then
  61             subj="$subj/emailAddress=$email"
  62         fi
  63
  64         # Generate new self-signed certificate
  65         mkdir -p $(dirname $crt)
  66         openssl req -new -x509 -days 3650 -set_serial $RANDOM \
  67             -batch -subj "$subj" \
  68             -nodes -keyout $key -out $crt
  69         check
  70         chmod 644 $crt
  71     fi
  72
  73     if [ ! -f $ca ] ; then
  74         # The certificate it self-signed, so it is its own CA
  75         cp -a $crt $ca
  76     fi
  77 }
  78
  79 case "$1" in
  80     start)
  81         MESSAGE=$"Generating SSL certificates"
  82         dialog "$MESSAGE"
  83
  84         # Verify or generate MA/SA certificate if necessary. This
  85         # self-signed certificate may be overridden later.
  86         verify_or_generate_certificate \
  87             $PLC_MA_SA_SSL_CRT $PLC_MA_SA_SSL_KEY $PLC_MA_SA_CA_SSL_CRT \
  88             "$PLC_NAME Management and Slice Authority" \
  89             $PLC_MAIL_SUPPORT_ADDRESS
  90
  91         # Make MA/SA key readable by apache so that the API can sign
  92         # certificates
  93         chown apache $PLC_MA_SA_SSL_KEY
  94         chmod 600 $PLC_MA_SA_SSL_KEY
  95
  96         # Extract the public key of the root CA (if any) that signed
  97         # the MA/SA certificate.
  98         openssl x509 -in $PLC_MA_SA_CA_SSL_CRT -noout -pubkey >$PLC_MA_SA_CA_SSL_KEY_PUB
  99         check
 100         chmod 644 $PLC_MA_SA_CA_SSL_KEY_PUB
 101
 102         # Generate HTTPS certificates if necessary. We generate a
 103         # certificate for each enabled server with a different
 104         # hostname. These self-signed certificates may be overridden
 105         # later.
 106         for server in WWW API BOOT ; do
 107             ssl_key=PLC_${server}_SSL_KEY
 108             ssl_crt=PLC_${server}_SSL_CRT
 109             ca_ssl_crt=PLC_${server}_CA_SSL_CRT
 110             hostname=PLC_${server}_HOST
 111
 112             # Check if we have already generated a certificate for
 113             # the same hostname.
 114             for previous_server in WWW API BOOT ; do
 115                 if [ "$server" = "$previous_server" ] ; then
 116                     break
 117                 fi
 118                 previous_ssl_key=PLC_${previous_server}_SSL_KEY
 119                 previous_ssl_crt=PLC_${previous_server}_SSL_CRT
 120                 previous_ca_ssl_crt=PLC_${previous_server}_CA_SSL_CRT
 121                 previous_hostname=PLC_${previous_server}_HOST
 122
 123                 if [ -f ${!previous_ssl_crt} ] && \
 124                     [ "$(ssl_cname ${!previous_ssl_crt})" = "${!hostname}" ] ; then
 125                     cp -a ${!previous_ssl_key} ${!ssl_key}
 126                     cp -a ${!previous_ssl_crt} ${!ssl_crt}
 127                     cp -a ${!previous_ca_ssl_crt} ${!ca_ssl_crt}
 128                     break
 129                 fi
 130             done
 131
 132             verify_or_generate_certificate \
 133                 ${!ssl_crt} ${!ssl_key} ${!ca_ssl_crt} \
 134                 ${!hostname} $PLC_MAIL_SUPPORT_ADDRESS
 135
 136         done
 137
 138         # Install HTTPS certificates into both /etc/pki (Fedora Core
 139         # 4) and /etc/httpd/conf (Fedora Core 2). If the API, boot,
 140         # and web servers are all running on the same machine, the web
 141         # server certificate takes precedence.
 142         for server in API BOOT WWW ; do
 143             enabled=PLC_${server}_ENABLED
 144             if [ "${!enabled}" != "1" ] ; then
 145                 continue
 146             fi
 147             ssl_key=PLC_${server}_SSL_KEY
 148             ssl_crt=PLC_${server}_SSL_CRT
 149
 150             symlink ${!ssl_crt} /etc/pki/tls/certs/localhost.crt
 151             symlink ${!ssl_key} /etc/pki/tls/private/localhost.key
 152             symlink ${!ssl_crt} /etc/httpd/conf/ssl.crt/server.crt
 153             symlink ${!ssl_key} /etc/httpd/conf/ssl.key/server.key
 154         done
 155
 156         result "$MESSAGE"
 157         ;;
 158 esac
 159
 160 exit $ERRORS