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