cmdline/apt-key

   1 #!/bin/sh
   2
   3 set -e
   4
   5 # We don't use a secret keyring, of course, but gpg panics and
   6 # implodes if there isn't one available
   7
   8 GPG_CMD="gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /etc/apt/secring.gpg --trustdb-name /etc/apt/trustdb.gpg"
   9 GPG="$GPG_CMD --keyring /etc/apt/trusted.gpg"
  10
  11
  12 MASTER_KEYRING=/usr/share/keyrings/ubuntu-master-keyring.gpg
  13 ARCHIVE_KEYRING=/usr/share/keyrings/ubuntu-archive-keyring.gpg
  14 REMOVED_KEYS=/usr/share/keyrings/ubuntu-archive-removed-keys.gpg
  15
  16 add_keys_with_verify_against_master_keyring() {
  17     ADD_KEYRING=$1
  18     MASTER=$2
  19
  20     if [ ! -f "$ADD_KEYRING" ]; then
  21         echo "ERROR: '$ADD_KEYRING' not found"
  22         return
  23     fi
  24     if [ ! -f "$MASTER" ]; then
  25         echo "ERROR: '$MASTER' not found"
  26         return
  27     fi
  28
  29     # when adding new keys, make sure that the archive-master-keyring
  30     # is honored. so:
  31     #   all keys that are exported and have the name
  32     #   "Ubuntu Archive Automatic Signing Key" must have a valid signature
  33     #   from a key in the ubuntu-master-keyring
  34     add_keys=`$GPG_CMD --keyring $ADD_KEYRING --with-colons --list-keys | grep ^pub | cut -d: -f5`
  35     master_keys=`$GPG_CMD --keyring $MASTER --with-colons --list-keys | grep ^pub | cut -d: -f5`
  36     for add_key in $add_keys; do
  37         ADDED=0
  38         for master_key in $master_keys; do
  39             if $GPG_CMD --keyring $ADD_KEYRING --list-sigs --with-colons $add_key | grep ^sig | cut -d: -f5 | grep -q $master_key; then
  40                 $GPG_CMD --quiet --batch --keyring $ARCHIVE_KEYRING --export $add_key | $GPG --import
  41                 ADDED=1
  42             fi
  43         done
  44         if [ $ADDED = 0 ]; then
  45             echo >&2 "Key '$add_key' not added. It is not signed with a master key"
  46         fi
  47     done
  48 }
  49
  50 update() {
  51     if [ ! -f $ARCHIVE_KEYRING ]; then
  52         echo >&2 "ERROR: Can't find the archive-keyring"
  53         echo >&2 "Is the ubuntu-keyring package installed?"
  54         exit 1
  55     fi
  56
  57     # add new keys, if no MASTER_KEYRING is used, use the traditional
  58     # way
  59     if [ -z "$MASTER_KEYRING" ]; then
  60         $GPG_CMD --quiet --batch --keyring $ARCHIVE_KEYRING --export | $GPG --import
  61     else
  62         add_keys_with_verify_against_master_keyring $ARCHIVE_KEYRING $MASTER_KEYRING
  63     fi
  64
  65     # remove no-longer supported/used keys
  66     keys=`$GPG_CMD --keyring $REMOVED_KEYS --with-colons --list-keys | grep ^pub | cut -d: -f5`
  67     for key in $keys; do
  68         if $GPG --list-keys --with-colons | grep ^pub | cut -d: -f5 | grep -q $key; then
  69             $GPG --quiet --batch --delete-key --yes ${key}
  70         fi
  71     done
  72 }
  73
  74
  75 usage() {
  76     echo "Usage: apt-key [command] [arguments]"
  77     echo
  78     echo "Manage apt's list of trusted keys"
  79     echo
  80     echo "  apt-key add <file>          - add the key contained in <file> ('-' for stdin)"
  81     echo "  apt-key del <keyid>         - remove the key <keyid>"
  82     echo "  apt-key export <keyid>      - output the key <keyid>"
  83     echo "  apt-key exportall           - output all trusted keys"
  84     echo "  apt-key update              - update keys using the keyring package"
  85     echo "  apt-key list                - list keys"
  86     echo
  87 }
  88
  89 command="$1"
  90 if [ -z "$command" ]; then
  91     usage
  92     exit 1
  93 fi
  94 shift
  95
  96 if [ "$command" != "help" ] && ! which gpg >/dev/null 2>&1; then
  97     echo >&2 "Warning: gnupg does not seem to be installed."
  98     echo >&2 "Warning: apt-key requires gnupg for most operations."
  99     echo >&2
 100 fi
 101
 102 case "$command" in
 103     add)
 104         $GPG --quiet --batch --import "$1"
 105         echo "OK"
 106         ;;
 107     del|rm|remove)
 108         $GPG --quiet --batch --delete-key --yes "$1"
 109         echo "OK"
 110         ;;
 111     update)
 112         update
 113         ;;
 114     list)
 115         $GPG --batch --list-keys
 116         ;;
 117     finger*)
 118         $GPG --batch --fingerprint
 119         ;;
 120     export)
 121         $GPG --armor --export "$1"
 122         ;;
 123     exportall)
 124         $GPG --armor --export
 125         ;;
 126     adv*)
 127         echo "Executing: $GPG $*"
 128         $GPG $*
 129         ;;
 130     help)
 131         usage
 132         ;;
 133     *)
 134         usage
 135         exit 1
 136         ;;
 137 esac