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         ADDED=0
  39         for master_key in $master_keys; do
  40             if $GPG_CMD --keyring $ADD_KEYRING --list-sigs --with-colons $add_key | grep ^sig | cut -d: -f5 | grep -q $master_key; then
  41                 $GPG_CMD --quiet --batch --keyring $ARCHIVE_KEYRING --export $add_key | $GPG --import
  42                 ADDED=1
  43             fi
  44         done
  45         if [ $ADDED = 0 ]; then
  46             echo >&2 "Key '$add_key' not added. It is not signed with a master key"
  47         fi
  48     done
  49 }
  50
  51 update() {
  52     if [ ! -f $ARCHIVE_KEYRING ]; then
  53         echo >&2 "ERROR: Can't find the archive-keyring"
  54         echo >&2 "Is the debian-archive-keyring package installed?"
  55         exit 1
  56     fi
  57
  58     # add new keys, if no MASTER_KEYRING is used, use the traditional
  59     # way
  60     if [ -z "$MASTER_KEYRING" ]; then
  61         $GPG_CMD --quiet --batch --keyring $ARCHIVE_KEYRING --export | $GPG --import
  62     else
  63         add_keys_with_verify_against_master_keyring $ARCHIVE_KEYRING $MASTER_KEYRING
  64     fi
  65
  66     # remove no-longer supported/used keys
  67     keys=`$GPG_CMD --keyring $REMOVED_KEYS --with-colons --list-keys | grep ^pub | cut -d: -f5`
  68     for key in $keys; do
  69         if $GPG --list-keys --with-colons | grep ^pub | cut -d: -f5 | grep -q $key; then
  70             $GPG --quiet --batch --delete-key --yes ${key}
  71         fi
  72     done
  73 }
  74
  75
  76 usage() {
  77     echo "Usage: apt-key [command] [arguments]"
  78     echo
  79     echo "Manage apt's list of trusted keys"
  80     echo
  81     echo "  apt-key add <file>          - add the key contained in <file> ('-' for stdin)"
  82     echo "  apt-key del <keyid>         - remove the key <keyid>"
  83     echo "  apt-key export <keyid>      - output the key <keyid>"
  84     echo "  apt-key exportall           - output all trusted keys"
  85     echo "  apt-key update              - update keys using the keyring package"
  86     echo "  apt-key list                - list keys"
  87     echo
  88 }
  89
  90 command="$1"
  91 if [ -z "$command" ]; then
  92     usage
  93     exit 1
  94 fi
  95 shift
  96
  97 if [ "$command" != "help" ] && ! which gpg >/dev/null 2>&1; then
  98     echo >&2 "Warning: gnupg does not seem to be installed."
  99     echo >&2 "Warning: apt-key requires gnupg for most operations."
 100     echo >&2
 101 fi
 102
 103 case "$command" in
 104     add)
 105         $GPG --quiet --batch --import "$1"
 106         echo "OK"
 107         ;;
 108     del|rm|remove)
 109         $GPG --quiet --batch --delete-key --yes "$1"
 110         echo "OK"
 111         ;;
 112     update)
 113         update
 114         ;;
 115     list)
 116         $GPG --batch --list-keys
 117         ;;
 118     finger*)
 119         $GPG --batch --fingerprint
 120         ;;
 121     export)
 122         $GPG --armor --export "$1"
 123         ;;
 124     exportall)
 125         $GPG --armor --export
 126         ;;
 127     adv*)
 128         echo "Executing: $GPG $*"
 129         $GPG $*
 130         ;;
 131     help)
 132         usage
 133         ;;
 134     *)
 135         usage
 136         exit 1
 137         ;;
 138 esac