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