plc.d/gpg

   1 #!/bin/bash
   2 #
   3 # priority: 400
   4 #
   5 # Generate GPG keys
   6 #
   7 # Mark Huang <mlhuang@cs.princeton.edu>
   8 # Copyright (C) 2006 The Trustees of Princeton University
   9 #
  10
  11 # Source function library and configuration
  12 . /etc/plc.d/functions
  13 . /etc/planetlab/plc_config
  14
  15 # Be verbose
  16 set -x
  17
  18 case "$1" in
  19     start)
  20         # Make temporary GPG home directory
  21         homedir=$(mktemp -d /tmp/gpg.XXXXXX)
  22
  23         # in case a previous gpg invocation failed in some weird way
  24         # and left behind a zero length gpg key (pub or priv).
  25         if [ -f $PLC_ROOT_GPG_KEY_PUB -a ! -s $PLC_ROOT_GPG_KEY_PUB ] ; then
  26             rm -f $PLC_ROOT_GPG_KEY_PUB
  27         fi
  28         if [ -f $PLC_ROOT_GPG_KEY -a ! -s $PLC_ROOT_GPG_KEY ] ; then
  29             rm -f $PLC_ROOT_GPG_KEY
  30         fi
  31
  32         if [ ! -f $PLC_ROOT_GPG_KEY_PUB -o ! -f $PLC_ROOT_GPG_KEY ] ; then
  33             # Generate new GPG keyring
  34             MESSAGE=$"Generating GPG keys"
  35             dialog "$MESSAGE"
  36
  37             mkdir -p $(dirname $PLC_ROOT_GPG_KEY_PUB)
  38             mkdir -p $(dirname $PLC_ROOT_GPG_KEY)
  39
  40             # Temporarily replace /dev/random with /dev/urandom to
  41             # avoid running out of entropy.
  42             rm -f /dev/random
  43             # 1 9 is /dev/urandom
  44             mknod /dev/random c 1 9
  45             # sometimes mknod fails within an improperly setup vserver
  46             check
  47             gpg --homedir=$homedir --no-permission-warning --batch --no-tty --yes \
  48                 --gen-key <<EOF
  49 Key-Type: DSA
  50 Key-Length: 1024
  51 Subkey-Type: ELG-E
  52 Subkey-Length: 1024
  53 Name-Real: $PLC_NAME Central
  54 Name-Comment: http://$PLC_WWW_HOST/
  55 Name-Email: $PLC_MAIL_SUPPORT_ADDRESS
  56 Expire-Date: 0
  57 %pubring $PLC_ROOT_GPG_KEY_PUB
  58 %secring $PLC_ROOT_GPG_KEY
  59 %commit
  60 EOF
  61             check
  62             rm -f /dev/random
  63             mknod /dev/random c 1 8
  64         else
  65             # Update GPG UID
  66             MESSAGE=$"Updating GPG keys"
  67             dialog "$MESSAGE"
  68
  69             # Get the current GPG fingerprint and comment
  70             OLDIFS=$IFS
  71             IFS=:
  72             while read -a fields ; do
  73                 if [ "${fields[0]}" = "pub" ] ; then
  74                     fingerprint=${fields[4]}
  75                     break
  76                 fi
  77             done < <(
  78                 gpg --homedir=$homedir --no-permission-warning --batch --no-tty --yes \
  79                     --no-default-keyring \
  80                     --secret-keyring=$PLC_ROOT_GPG_KEY \
  81                     --keyring=$PLC_ROOT_GPG_KEY_PUB \
  82                     --list-public-keys --with-colons
  83                 check
  84             )
  85             IFS=$OLDIFS
  86
  87             # Add a new UID if appropriate. GPG will detect and merge duplicates.
  88             gpg --homedir=$homedir --no-permission-warning --batch --no-tty --yes \
  89                 --no-default-keyring \
  90                 --secret-keyring=$PLC_ROOT_GPG_KEY \
  91                 --keyring=$PLC_ROOT_GPG_KEY_PUB \
  92                 --command-fd 0 --status-fd 1 --edit-key $fingerprint <<EOF
  93 adduid
  94 $PLC_NAME Central
  95 $PLC_MAIL_SUPPORT_ADDRESS
  96 http://$PLC_WWW_HOST/
  97 save
  98 EOF
  99             check
 100         fi
 101
 102         # Install the key in the RPM database
 103         mkdir -p /etc/pki/rpm-gpg
 104         gpg --homedir=$homedir --no-permission-warning --batch --no-tty --yes \
 105             --no-default-keyring \
 106             --secret-keyring=$PLC_ROOT_GPG_KEY \
 107             --keyring=$PLC_ROOT_GPG_KEY_PUB \
 108             --export --armor >"/etc/pki/rpm-gpg/RPM-GPG-KEY-$PLC_NAME"
 109         check
 110         if rpm -q gpg-pubkey ; then
 111             rpm --allmatches -e gpg-pubkey
 112             check
 113         fi
 114         # starting with rpm-4.6, this fails when run a second time
 115         # it would be complex to do this properly based on the filename,
 116         # as /etc/pki/rpm-gpg/ typically has many symlinks to the same file
 117         # see also http://fedoranews.org/tchung/gpg/
 118         # so just ignore the result
 119         rpm --import /etc/pki/rpm-gpg/* || :
 120         check
 121
 122         # Make GPG key readable by apache so that the API can sign peer requests
 123         chown apache $PLC_ROOT_GPG_KEY
 124         chmod 644 $PLC_ROOT_GPG_KEY_PUB
 125         chmod 600 $PLC_ROOT_GPG_KEY
 126         check
 127
 128         # Cleanup
 129         rm -rf $homedir
 130
 131         result "$MESSAGE"
 132         ;;
 133 esac
 134
 135 exit $ERRORS