828 lines
27 KiB
Bash
Executable File
828 lines
27 KiB
Bash
Executable File
#!/bin/sh
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set -e
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unset GREP_OPTIONS GPGHOMEDIR CURRENTTRAP
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export IFS="$(printf "\n\b")"
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MASTER_KEYRING=''
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eval "$(apt-config shell MASTER_KEYRING APT::Key::MasterKeyring)"
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ARCHIVE_KEYRING=''
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eval "$(apt-config shell ARCHIVE_KEYRING APT::Key::ArchiveKeyring)"
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REMOVED_KEYS=''
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eval "$(apt-config shell REMOVED_KEYS APT::Key::RemovedKeys)"
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ARCHIVE_KEYRING_URI=''
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eval "$(apt-config shell ARCHIVE_KEYRING_URI APT::Key::ArchiveKeyringURI)"
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aptkey_echo() { echo "$@"; }
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find_gpgv_status_fd() {
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while [ -n "$1" ]; do
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if [ "$1" = '--status-fd' ]; then
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shift
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echo "$1"
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break
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fi
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shift
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done
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}
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GPGSTATUSFD="$(find_gpgv_status_fd "$@")"
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apt_warn() {
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if [ -z "$GPGHOMEDIR" ]; then
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echo >&2 'W:' "$@"
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else
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echo 'W:' "$@" > "${GPGHOMEDIR}/aptwarnings.log"
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fi
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if [ -n "$GPGSTATUSFD" ]; then
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echo >&${GPGSTATUSFD} '[APTKEY:] WARNING' "$@"
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fi
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}
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apt_error() {
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if [ -z "$GPGHOMEDIR" ]; then
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echo >&2 'E:' "$@"
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else
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echo 'E:' "$@" > "${GPGHOMEDIR}/aptwarnings.log"
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fi
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if [ -n "$GPGSTATUSFD" ]; then
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echo >&${GPGSTATUSFD} '[APTKEY:] ERROR' "$@"
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fi
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}
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cleanup_gpg_home() {
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if [ -z "$GPGHOMEDIR" ]; then return; fi
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if [ -s "$GPGHOMEDIR/aptwarnings.log" ]; then
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cat >&2 "$GPGHOMEDIR/aptwarnings.log"
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fi
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if command_available 'gpgconf'; then
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GNUPGHOME="${GPGHOMEDIR}" gpgconf --kill all >/dev/null 2>&1 || true
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fi
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rm -rf "$GPGHOMEDIR"
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}
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# gpg needs (in different versions more or less) files to function correctly,
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# so we give it its own homedir and generate some valid content for it later on
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create_gpg_home() {
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# for cases in which we want to cache a homedir due to expensive setup
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if [ -n "$GPGHOMEDIR" ]; then
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return
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fi
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if [ -n "$TMPDIR" ]; then
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# tmpdir is a directory and current user has rwx access to it
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# same tests as in apt-pkg/contrib/fileutl.cc GetTempDir()
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if [ ! -d "$TMPDIR" ] || [ ! -r "$TMPDIR" ] || [ ! -w "$TMPDIR" ] || [ ! -x "$TMPDIR" ]; then
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unset TMPDIR
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fi
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fi
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GPGHOMEDIR="$(mktemp --directory --tmpdir 'apt-key-gpghome.XXXXXXXXXX')"
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CURRENTTRAP="${CURRENTTRAP} cleanup_gpg_home;"
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trap "${CURRENTTRAP}" 0 HUP INT QUIT ILL ABRT FPE SEGV PIPE TERM
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if [ -z "$GPGHOMEDIR" ]; then
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apt_error "Could not create temporary gpg home directory in $TMPDIR (wrong permissions?)"
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exit 28
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fi
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chmod 700 "$GPGHOMEDIR"
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}
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requires_root() {
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if [ "$(id -u)" -ne 0 ]; then
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apt_error "This command can only be used by root."
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exit 1
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fi
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}
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command_available() {
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if [ -x "$1" ]; then return 0; fi
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# command -v "$1" >/dev/null 2>&1 # not required by policy, see #747320
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# which "$1" >/dev/null 2>&1 # is in debianutils (essential) but not on non-debian systems
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local OLDIFS="$IFS"
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IFS=:
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for p in $PATH; do
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if [ -x "${p}/${1}" ]; then
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IFS="$OLDIFS"
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return 0
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fi
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done
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IFS="$OLDIFS"
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return 1
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}
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escape_shell() {
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echo "$@" | sed -e "s#'#'\"'\"'#g"
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}
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get_fingerprints_of_keyring() {
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aptkey_execute "$GPG_SH" --keyring "$1" --with-colons --fingerprint | while read publine; do
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# search for a public key
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if [ "${publine%%:*}" != 'pub' ]; then continue; fi
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# search for the associated fingerprint (should be the very next line)
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while read fprline; do
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if [ "${fprline%%:*}" = 'sub' ]; then break; # should never happen
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elif [ "${fprline%%:*}" != 'fpr' ]; then continue; fi
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echo "$fprline" | cut -d':' -f 10
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done
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# order in the keyring shouldn't be important
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done | sort
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}
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add_keys_with_verify_against_master_keyring() {
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ADD_KEYRING="$1"
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MASTER="$2"
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if [ ! -f "$ADD_KEYRING" ]; then
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apt_error "Keyring '$ADD_KEYRING' to be added not found"
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return
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fi
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if [ ! -f "$MASTER" ]; then
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apt_error "Master-Keyring '$MASTER' not found"
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return
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fi
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# when adding new keys, make sure that the archive-master-keyring
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# is honored. so:
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# all keys that are exported must have a valid signature
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# from a key in the $distro-master-keyring
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add_keys="$(get_fingerprints_of_keyring "$ADD_KEYRING")"
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all_add_keys="$(aptkey_execute "$GPG_SH" --keyring "$ADD_KEYRING" --with-colons --list-keys | grep ^[ps]ub | cut -d: -f5)"
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master_keys="$(aptkey_execute "$GPG_SH" --keyring "$MASTER" --with-colons --list-keys | grep ^pub | cut -d: -f5)"
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# ensure there are no colisions LP: #857472
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for all_add_key in $all_add_keys; do
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for master_key in $master_keys; do
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if [ "$all_add_key" = "$master_key" ]; then
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echo >&2 "Keyid collision for '$all_add_key' detected, operation aborted"
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return 1
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fi
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done
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done
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for add_key in $add_keys; do
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# export the add keyring one-by-one
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local TMP_KEYRING="${GPGHOMEDIR}/tmp-keyring.gpg"
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aptkey_execute "$GPG_SH" --batch --yes --keyring "$ADD_KEYRING" --output "$TMP_KEYRING" --export "$add_key"
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if ! aptkey_execute "$GPG_SH" --batch --yes --keyring "$TMP_KEYRING" --import "$MASTER" > "${GPGHOMEDIR}/gpgoutput.log" 2>&1; then
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cat >&2 "${GPGHOMEDIR}/gpgoutput.log"
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false
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fi
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# check if signed with the master key and only add in this case
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ADDED=0
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for master_key in $master_keys; do
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if aptkey_execute "$GPG_SH" --keyring "$TMP_KEYRING" --check-sigs --with-colons "$add_key" \
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| grep '^sig:!:' | cut -d: -f5 | grep -q "$master_key"; then
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aptkey_execute "$GPG_SH" --batch --yes --keyring "$ADD_KEYRING" --export "$add_key" \
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| aptkey_execute "$GPG" --batch --yes --import
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ADDED=1
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fi
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done
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if [ $ADDED = 0 ]; then
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echo >&2 "Key '$add_key' not added. It is not signed with a master key"
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fi
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rm -f "${TMP_KEYRING}"
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done
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}
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# update the current archive signing keyring from a network URI
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# the archive-keyring keys needs to be signed with the master key
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# (otherwise it does not make sense from a security POV)
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net_update() {
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local APT_DIR='/'
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eval $(apt-config shell APT_DIR Dir)
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# Disabled for now as code is insecure (LP: #1013639 (and 857472, 1013128))
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APT_KEY_NET_UPDATE_ENABLED=""
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eval $(apt-config shell APT_KEY_NET_UPDATE_ENABLED APT::Key::Net-Update-Enabled)
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if [ -z "$APT_KEY_NET_UPDATE_ENABLED" ]; then
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exit 1
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fi
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if [ -z "$ARCHIVE_KEYRING_URI" ]; then
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apt_error 'Your distribution is not supported in net-update as no uri for the archive-keyring is set'
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exit 1
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fi
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# in theory we would need to depend on wget for this, but this feature
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# isn't usable in debian anyway as we have no keyring uri nor a master key
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if ! command_available 'wget'; then
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apt_error 'wget is required for a network-based update, but it is not installed'
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exit 1
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fi
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if [ ! -d "${APT_DIR}/var/lib/apt/keyrings" ]; then
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mkdir -p "${APT_DIR}/var/lib/apt/keyrings"
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fi
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keyring="${APT_DIR}/var/lib/apt/keyrings/$(basename "$ARCHIVE_KEYRING_URI")"
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old_mtime=0
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if [ -e $keyring ]; then
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old_mtime=$(stat -c %Y "$keyring")
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fi
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(cd "${APT_DIR}/var/lib/apt/keyrings"; wget --timeout=90 -q -N "$ARCHIVE_KEYRING_URI")
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if [ ! -e "$keyring" ]; then
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return
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fi
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new_mtime=$(stat -c %Y "$keyring")
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if [ $new_mtime -ne $old_mtime ]; then
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aptkey_echo "Checking for new archive signing keys now"
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add_keys_with_verify_against_master_keyring "$keyring" "$MASTER_KEYRING"
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fi
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}
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update() {
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if [ -z "$APT_KEY_DONT_WARN_ON_DANGEROUS_USAGE" ]; then
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echo >&2 "Warning: 'apt-key update' is deprecated and should not be used anymore!"
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if [ -z "$ARCHIVE_KEYRING" ]; then
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echo >&2 "Note: In your distribution this command is a no-op and can therefore be removed safely."
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exit 0
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fi
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fi
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if [ ! -f "$ARCHIVE_KEYRING" ]; then
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apt_error "Can't find the archive-keyring (Is the debian-archive-keyring package installed?)"
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exit 1
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fi
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# add new keys from the package;
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# we do not use add_keys_with_verify_against_master_keyring here,
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# because "update" is run on regular package updates. A
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# attacker might as well replace the master-archive-keyring file
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# in the package and add his own keys. so this check wouldn't
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# add any security. we *need* this check on net-update though
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import_keyring_into_keyring "$ARCHIVE_KEYRING" '' && cat "${GPGHOMEDIR}/gpgoutput.log"
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if [ -r "$REMOVED_KEYS" ]; then
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# remove no-longer supported/used keys
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get_fingerprints_of_keyring "$(dearmor_filename "$REMOVED_KEYS")" | while read key; do
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foreach_keyring_do 'remove_key_from_keyring' "$key"
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done
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else
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apt_warn "Removed keys keyring '$REMOVED_KEYS' missing or not readable"
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fi
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}
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remove_key_from_keyring() {
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local KEYRINGFILE="$1"
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shift
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# non-existent keyrings have by definition no keys
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if [ ! -e "$KEYRINGFILE" ]; then
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return
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fi
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local FINGERPRINTS="${GPGHOMEDIR}/keyringfile.keylst"
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local DEARMOR="$(dearmor_filename "$KEYRINGFILE")"
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get_fingerprints_of_keyring "$DEARMOR" > "$FINGERPRINTS"
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for KEY in "$@"; do
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# strip leading 0x, if present:
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KEY="$(echo "${KEY#0x}" | tr -d ' ')"
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# check if the key is in this keyring
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if ! grep -iq "^[0-9A-F]*${KEY}$" "$FINGERPRINTS"; then
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continue
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fi
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if [ ! -w "$KEYRINGFILE" ]; then
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apt_warn "Key ${KEY} is in keyring ${KEYRINGFILE}, but can't be removed as it is read only."
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continue
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fi
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# check if it is the only key in the keyring and if so remove the keyring altogether
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if [ '1' = "$(uniq "$FINGERPRINTS" | wc -l)" ]; then
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mv -f "$KEYRINGFILE" "${KEYRINGFILE}~" # behave like gpg
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return
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fi
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# we can't just modify pointed to files as these might be in /usr or something
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local REALTARGET
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if [ -L "$DEARMOR" ]; then
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REALTARGET="$(readlink -f "$DEARMOR")"
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mv -f "$DEARMOR" "${DEARMOR}.dpkg-tmp"
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cp -a "$REALTARGET" "$DEARMOR"
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fi
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# delete the key from the keyring
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aptkey_execute "$GPG_SH" --keyring "$DEARMOR" --batch --delete-keys --yes "$KEY"
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if [ -n "$REALTARGET" ]; then
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# the real backup is the old link, not the copy we made
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mv -f "${DEARMOR}.dpkg-tmp" "${DEARMOR}~"
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fi
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if [ "$DEARMOR" != "$KEYRINGFILE" ]; then
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mv -f "$KEYRINGFILE" "${KEYRINGFILE}~"
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create_new_keyring "$KEYRINGFILE"
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aptkey_execute "$GPG_SH" --keyring "$DEARMOR" --armor --export > "$KEYRINGFILE"
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fi
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get_fingerprints_of_keyring "$DEARMOR" > "$FINGERPRINTS"
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done
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}
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accessible_file_exists() {
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if ! test -s "$1"; then
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return 1
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fi
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if test -r "$1"; then
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return 0
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fi
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apt_warn "The key(s) in the keyring $1 are ignored as the file is not readable by user '$USER' executing apt-key."
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return 1
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}
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is_supported_keyring() {
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# empty files are always supported
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if ! test -s "$1"; then
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return 0
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fi
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local FILEEXT="${1##*.}"
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if [ "$FILEEXT" = 'gpg' ]; then
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# 0x98, 0x99 and 0xC6 via octal as hex isn't supported by dashs printf
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if printf '\231' | cmp --silent --bytes=1 - "$1"; then
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true
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elif printf '\230' | cmp --silent --bytes=1 - "$1"; then
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true
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elif printf '\306' | cmp --silent --bytes=1 - "$1"; then
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true
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else
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apt_warn "The key(s) in the keyring $1 are ignored as the file has an unsupported filetype."
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return 1
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fi
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elif [ "$FILEEXT" = 'asc' ]; then
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true #dearmor_filename will deal with them
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else
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# most callers ignore unsupported extensions silently
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apt_warn "The key(s) in the keyring $1 are ignored as the file has an unsupported filename extension."
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return 1
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fi
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return 0
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}
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foreach_keyring_do() {
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local ACTION="$1"
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shift
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# if a --keyring was given, just work on this one
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if [ -n "$FORCED_KEYRING" ]; then
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$ACTION "$FORCED_KEYRING" "$@"
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else
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# otherwise all known keyrings are up for inspection
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if accessible_file_exists "$TRUSTEDFILE" && is_supported_keyring "$TRUSTEDFILE"; then
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$ACTION "$TRUSTEDFILE" "$@"
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fi
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local TRUSTEDPARTS="/etc/apt/trusted.gpg.d"
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eval "$(apt-config shell TRUSTEDPARTS Dir::Etc::TrustedParts/d)"
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if [ -d "$TRUSTEDPARTS" ]; then
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TRUSTEDPARTS="$(readlink -f "$TRUSTEDPARTS")"
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local TRUSTEDPARTSLIST="$(cd /; find "$TRUSTEDPARTS" -mindepth 1 -maxdepth 1 \( -name '*.gpg' -o -name '*.asc' \))"
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for trusted in $(echo "$TRUSTEDPARTSLIST" | sort); do
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if accessible_file_exists "$trusted" && is_supported_keyring "$trusted"; then
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$ACTION "$trusted" "$@"
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fi
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done
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fi
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fi
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}
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list_keys_in_keyring() {
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local KEYRINGFILE="$1"
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shift
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# fingerprint and co will fail if key isn't in this keyring
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aptkey_execute "$GPG_SH" --keyring "$(dearmor_filename "$KEYRINGFILE")" "$@" > "${GPGHOMEDIR}/gpgoutput.log" 2> "${GPGHOMEDIR}/gpgoutput.err" || true
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if [ ! -s "${GPGHOMEDIR}/gpgoutput.log" ]; then
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return
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fi
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# we fake gpg header here to refer to the real asc file rather than a temp file
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if [ "${KEYRINGFILE##*.}" = 'asc' ]; then
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if expr match "$(sed -n '2p' "${GPGHOMEDIR}/gpgoutput.log")" '^-\+$' >/dev/null 2>&1; then
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echo "$KEYRINGFILE"
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echo "$KEYRINGFILE" | sed 's#[^-]#-#g'
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sed '1,2d' "${GPGHOMEDIR}/gpgoutput.log" || true
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else
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cat "${GPGHOMEDIR}/gpgoutput.log"
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fi
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else
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cat "${GPGHOMEDIR}/gpgoutput.log"
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fi
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if [ -s "${GPGHOMEDIR}/gpgoutput.err" ]; then
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cat >&2 "${GPGHOMEDIR}/gpgoutput.err"
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fi
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}
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export_key_from_to() {
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local FROM="$1"
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local TO="$2"
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shift 2
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if ! aptkey_execute "$GPG_SH" --keyring "$(dearmor_filename "$FROM")" --export "$@" > "$TO" 2> "${GPGHOMEDIR}/gpgoutput.log"; then
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cat >&2 "${GPGHOMEDIR}/gpgoutput.log"
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false
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else
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chmod 0644 -- "$TO"
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fi
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}
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import_keyring_into_keyring() {
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local FROM="${1:-${GPGHOMEDIR}/pubring.gpg}"
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local TO="${2:-${GPGHOMEDIR}/pubring.gpg}"
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shift 2
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rm -f "${GPGHOMEDIR}/gpgoutput.log"
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# the idea is simple: We take keys from one keyring and copy it to another
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# we do this with so many checks in between to ensure that WE control the
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# creation, so we know that the (potentially) created $TO keyring is a
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# simple keyring rather than a keybox as gpg2 would create it which in turn
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# can't be read by gpgv.
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# BEWARE: This is designed more in the way to work with the current
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# callers, than to have a well defined it would be easy to add new callers to.
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if [ ! -s "$TO" ]; then
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if [ -s "$FROM" ]; then
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if [ -z "$2" ]; then
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local OPTS
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if [ "${TO##*.}" = 'asc' ]; then
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OPTS='--armor'
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fi
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export_key_from_to "$(dearmor_filename "$FROM")" "$TO" $OPTS ${1:+"$1"}
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else
|
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create_new_keyring "$TO"
|
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fi
|
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else
|
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create_new_keyring "$TO"
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fi
|
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elif [ -s "$FROM" ]; then
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local EXPORTLIMIT="$1"
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if [ -n "$1$2" ]; then shift; fi
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local DEARMORTO="$(dearmor_filename "$TO")"
|
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if ! aptkey_execute "$GPG_SH" --keyring "$(dearmor_filename "$FROM")" --export ${EXPORTLIMIT:+"$EXPORTLIMIT"} \
|
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| aptkey_execute "$GPG_SH" --keyring "$DEARMORTO" --batch --import "$@" > "${GPGHOMEDIR}/gpgoutput.log" 2>&1; then
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cat >&2 "${GPGHOMEDIR}/gpgoutput.log"
|
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false
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fi
|
|
if [ "$DEARMORTO" != "$TO" ]; then
|
|
export_key_from_to "$DEARMORTO" "${DEARMORTO}.asc" --armor
|
|
if ! cmp -s "$TO" "${DEARMORTO}.asc" 2>/dev/null; then
|
|
cp -a "$TO" "${TO}~"
|
|
mv -f "${DEARMORTO}.asc" "$TO"
|
|
fi
|
|
fi
|
|
fi
|
|
}
|
|
|
|
dearmor_keyring() {
|
|
# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=831409#67
|
|
# The awk script is more complex through to skip surrounding garbage and
|
|
# to support multiple keys in one file (old gpgs generate version headers
|
|
# which get printed with the original and hence result in garbage input for base64
|
|
awk '/^-----BEGIN/{ x = 1; }
|
|
/^$/{ if (x == 1) { x = 2; }; }
|
|
/^[^=-]/{ if (x == 2) { print $0; }; }
|
|
/^-----END/{ x = 0; }' | base64 -d
|
|
}
|
|
dearmor_filename() {
|
|
if [ "${1##*.}" = 'asc' ]; then
|
|
local trusted="${GPGHOMEDIR}/${1##*/}.gpg"
|
|
if [ -s "$1" ]; then
|
|
dearmor_keyring < "$1" > "$trusted"
|
|
fi
|
|
echo "$trusted"
|
|
elif [ "${1##*.}" = 'gpg' ]; then
|
|
echo "$1"
|
|
elif [ "$(head -n 1 "$1" 2>/dev/null)" = '-----BEGIN PGP PUBLIC KEY BLOCK-----' ]; then
|
|
local trusted="${GPGHOMEDIR}/${1##*/}.gpg"
|
|
dearmor_keyring < "$1" > "$trusted"
|
|
echo "$trusted"
|
|
else
|
|
echo "$1"
|
|
fi
|
|
}
|
|
catfile() {
|
|
cat "$(dearmor_filename "$1")" >> "$2"
|
|
}
|
|
|
|
merge_all_trusted_keyrings_into_pubring() {
|
|
# does the same as:
|
|
# foreach_keyring_do 'import_keys_from_keyring' "${GPGHOMEDIR}/pubring.gpg"
|
|
# but without using gpg, just cat and find
|
|
local PUBRING="$(readlink -f "${GPGHOMEDIR}")/pubring.gpg"
|
|
rm -f "$PUBRING"
|
|
touch "$PUBRING"
|
|
foreach_keyring_do 'catfile' "$PUBRING"
|
|
}
|
|
|
|
import_keys_from_keyring() {
|
|
import_keyring_into_keyring "$1" "$2"
|
|
}
|
|
|
|
merge_keys_into_keyrings() {
|
|
import_keyring_into_keyring "$2" "$1" '' --import-options 'merge-only'
|
|
}
|
|
|
|
merge_back_changes() {
|
|
if [ -n "$FORCED_KEYRING" ]; then
|
|
# if the keyring was forced merge is already done
|
|
if [ "$FORCED_KEYRING" != "$TRUSTEDFILE" ]; then
|
|
mv -f "$FORCED_KEYRING" "${FORCED_KEYRING}~"
|
|
export_key_from_to "$TRUSTEDFILE" "$FORCED_KEYRING" --armor
|
|
fi
|
|
return
|
|
fi
|
|
if [ -s "${GPGHOMEDIR}/pubring.gpg" ]; then
|
|
# merge all updated keys
|
|
foreach_keyring_do 'merge_keys_into_keyrings' "${GPGHOMEDIR}/pubring.gpg"
|
|
fi
|
|
# look for keys which were added or removed
|
|
get_fingerprints_of_keyring "${GPGHOMEDIR}/pubring.orig.gpg" > "${GPGHOMEDIR}/pubring.orig.keylst"
|
|
get_fingerprints_of_keyring "${GPGHOMEDIR}/pubring.gpg" > "${GPGHOMEDIR}/pubring.keylst"
|
|
comm -3 "${GPGHOMEDIR}/pubring.keylst" "${GPGHOMEDIR}/pubring.orig.keylst" > "${GPGHOMEDIR}/pubring.diff"
|
|
# key isn't part of new keyring, so remove
|
|
cut -f 2 "${GPGHOMEDIR}/pubring.diff" | while read key; do
|
|
if [ -z "$key" ]; then continue; fi
|
|
foreach_keyring_do 'remove_key_from_keyring' "$key"
|
|
done
|
|
# key is only part of new keyring, so we need to import it
|
|
cut -f 1 "${GPGHOMEDIR}/pubring.diff" | while read key; do
|
|
if [ -z "$key" ]; then continue; fi
|
|
import_keyring_into_keyring '' "$TRUSTEDFILE" "$key"
|
|
done
|
|
}
|
|
|
|
setup_merged_keyring() {
|
|
if [ -n "$FORCED_KEYID" ]; then
|
|
merge_all_trusted_keyrings_into_pubring
|
|
FORCED_KEYRING="${GPGHOMEDIR}/forcedkeyid.gpg"
|
|
TRUSTEDFILE="${FORCED_KEYRING}"
|
|
echo "#!/bin/sh
|
|
exec sh '($(escape_shell "${GPG}")' --keyring '$(escape_shell "${TRUSTEDFILE}")' \"\$@\"" > "${GPGHOMEDIR}/gpg.1.sh"
|
|
GPG="${GPGHOMEDIR}/gpg.1.sh"
|
|
# ignore error as this "just" means we haven't found the forced keyid and the keyring will be empty
|
|
import_keyring_into_keyring '' "$TRUSTEDFILE" "$FORCED_KEYID" || true
|
|
elif [ -z "$FORCED_KEYRING" ]; then
|
|
merge_all_trusted_keyrings_into_pubring
|
|
if [ -r "${GPGHOMEDIR}/pubring.gpg" ]; then
|
|
cp -a "${GPGHOMEDIR}/pubring.gpg" "${GPGHOMEDIR}/pubring.orig.gpg"
|
|
else
|
|
touch "${GPGHOMEDIR}/pubring.gpg" "${GPGHOMEDIR}/pubring.orig.gpg"
|
|
fi
|
|
echo "#!/bin/sh
|
|
exec sh '$(escape_shell "${GPG}")' --keyring '$(escape_shell "${GPGHOMEDIR}/pubring.gpg")' \"\$@\"" > "${GPGHOMEDIR}/gpg.1.sh"
|
|
GPG="${GPGHOMEDIR}/gpg.1.sh"
|
|
else
|
|
TRUSTEDFILE="$(dearmor_filename "$FORCED_KEYRING")"
|
|
create_new_keyring "$TRUSTEDFILE"
|
|
echo "#!/bin/sh
|
|
exec sh '$(escape_shell "${GPG}")' --keyring '$(escape_shell "${TRUSTEDFILE}")' \"\$@\"" > "${GPGHOMEDIR}/gpg.1.sh"
|
|
GPG="${GPGHOMEDIR}/gpg.1.sh"
|
|
fi
|
|
}
|
|
|
|
create_new_keyring() {
|
|
# gpg defaults to mode 0600 for new keyrings. Create one with 0644 instead.
|
|
if ! [ -e "$1" ]; then
|
|
if [ -w "$(dirname "$1")" ]; then
|
|
touch -- "$1"
|
|
chmod 0644 -- "$1"
|
|
fi
|
|
fi
|
|
}
|
|
|
|
aptkey_execute() { sh "$@"; }
|
|
|
|
usage() {
|
|
echo "Usage: apt-key [--keyring file] [command] [arguments]"
|
|
echo
|
|
echo "Manage apt's list of trusted keys"
|
|
echo
|
|
echo " apt-key add <file> - add the key contained in <file> ('-' for stdin)"
|
|
echo " apt-key del <keyid> - remove the key <keyid>"
|
|
echo " apt-key export <keyid> - output the key <keyid>"
|
|
echo " apt-key exportall - output all trusted keys"
|
|
echo " apt-key update - update keys using the keyring package"
|
|
echo " apt-key net-update - update keys using the network"
|
|
echo " apt-key list - list keys"
|
|
echo " apt-key finger - list fingerprints"
|
|
echo " apt-key adv - pass advanced options to gpg (download key)"
|
|
echo
|
|
echo "If no specific keyring file is given the command applies to all keyring files."
|
|
}
|
|
|
|
while [ -n "$1" ]; do
|
|
case "$1" in
|
|
--keyring)
|
|
shift
|
|
if [ -z "$FORCED_KEYRING" -o "$FORCED_KEYRING" = '/dev/null' ]; then
|
|
TRUSTEDFILE="$1"
|
|
FORCED_KEYRING="$1"
|
|
elif [ "$TRUSTEDFILE" = "$FORCED_KEYRING" ]; then
|
|
create_gpg_home
|
|
FORCED_KEYRING="${GPGHOMEDIR}/mergedkeyrings.gpg"
|
|
echo -n '' > "$FORCED_KEYRING"
|
|
chmod 0644 -- "$FORCED_KEYRING"
|
|
catfile "$TRUSTEDFILE" "$FORCED_KEYRING"
|
|
catfile "$1" "$FORCED_KEYRING"
|
|
else
|
|
catfile "$1" "$FORCED_KEYRING"
|
|
fi
|
|
;;
|
|
--keyid)
|
|
shift
|
|
if [ -n "$FORCED_KEYID" ]; then
|
|
apt_error 'Specifying --keyid multiple times is not supported'
|
|
exit 1
|
|
fi
|
|
FORCED_KEYID="$1"
|
|
;;
|
|
--secret-keyring)
|
|
shift
|
|
FORCED_SECRET_KEYRING="$1"
|
|
;;
|
|
--readonly)
|
|
merge_back_changes() { true; }
|
|
create_new_keyring() { if [ ! -r "$FORCED_KEYRING" ]; then TRUSTEDFILE='/dev/null'; FORCED_KEYRING="$TRUSTEDFILE"; fi; }
|
|
;;
|
|
--fakeroot)
|
|
requires_root() { true; }
|
|
;;
|
|
--quiet)
|
|
aptkey_echo() { true; }
|
|
;;
|
|
--debug1)
|
|
# some cmds like finger redirect stderr to /dev/null …
|
|
aptkey_execute() { echo 'EXEC:' "$@"; sh "$@"; }
|
|
;;
|
|
--debug2)
|
|
# … other more complicated ones pipe gpg into gpg.
|
|
aptkey_execute() { echo >&2 'EXEC:' "$@"; sh "$@"; }
|
|
;;
|
|
--homedir)
|
|
# force usage of a specific homedir instead of creating a temporary
|
|
shift
|
|
GPGHOMEDIR="$1"
|
|
;;
|
|
--*)
|
|
echo >&2 "Unknown option: $1"
|
|
usage
|
|
exit 1;;
|
|
*)
|
|
break;;
|
|
esac
|
|
shift
|
|
done
|
|
|
|
if [ -z "$TRUSTEDFILE" ]; then
|
|
TRUSTEDFILE="/etc/apt/trusted.gpg"
|
|
eval $(apt-config shell TRUSTEDFILE Apt::GPGV::TrustedKeyring)
|
|
eval $(apt-config shell TRUSTEDFILE Dir::Etc::Trusted/f)
|
|
fi
|
|
|
|
command="$1"
|
|
if [ -z "$command" ]; then
|
|
usage
|
|
exit 1
|
|
fi
|
|
shift
|
|
|
|
prepare_gpg_home() {
|
|
# crude detection if we are called from a maintainerscript where the
|
|
# package depends on gnupg or not. We accept recommends here as
|
|
# well as the script hopefully uses apt-key optionally then like e.g.
|
|
# debian-archive-keyring for (upgrade) cleanup did
|
|
if [ -n "$DPKG_MAINTSCRIPT_PACKAGE" ] && [ -z "$APT_KEY_DONT_WARN_ON_DANGEROUS_USAGE" ]; then
|
|
if ! dpkg-query --show --showformat '${Pre-Depends}${Depends}${Recommends}\n' "$DPKG_MAINTSCRIPT_PACKAGE" 2>/dev/null | grep -q gnupg; then
|
|
cat >&2 <<EOF
|
|
Warning: The $DPKG_MAINTSCRIPT_NAME maintainerscript of the package $DPKG_MAINTSCRIPT_PACKAGE
|
|
Warning: seems to use apt-key (provided by apt) without depending on gnupg or gnupg2.
|
|
Warning: This will BREAK in the future and should be fixed by the package maintainer(s).
|
|
Note: Check first if apt-key functionality is needed at all - it probably isn't!
|
|
EOF
|
|
fi
|
|
fi
|
|
eval "$(apt-config shell GPG_EXE Apt::Key::gpgcommand)"
|
|
if [ -n "$GPG_EXE" ] && command_available "$GPG_EXE"; then
|
|
true
|
|
elif command_available 'gpg'; then
|
|
GPG_EXE="gpg"
|
|
elif command_available 'gpg2'; then
|
|
GPG_EXE="gpg2"
|
|
elif command_available 'gpg1'; then
|
|
GPG_EXE="gpg1"
|
|
else
|
|
apt_error 'gnupg, gnupg2 and gnupg1 do not seem to be installed, but one of them is required for this operation'
|
|
exit 255
|
|
fi
|
|
|
|
create_gpg_home
|
|
|
|
# now tell gpg that it shouldn't try to maintain this trustdb file
|
|
echo "#!/bin/sh
|
|
exec '$(escape_shell "${GPG_EXE}")' --ignore-time-conflict --no-options --no-default-keyring \\
|
|
--homedir '$(escape_shell "${GPGHOMEDIR}")' --no-auto-check-trustdb --trust-model always \"\$@\"" > "${GPGHOMEDIR}/gpg.0.sh"
|
|
GPG_SH="${GPGHOMEDIR}/gpg.0.sh"
|
|
GPG="$GPG_SH"
|
|
|
|
# create the trustdb with an (empty) dummy keyring
|
|
# older gpgs required it, newer gpgs even warn that it isn't needed,
|
|
# but require it nonetheless for some commands, so we just play safe
|
|
# here for the foreseeable future and create a dummy one
|
|
touch "${GPGHOMEDIR}/empty.gpg"
|
|
if ! "$GPG_EXE" --ignore-time-conflict --no-options --no-default-keyring \
|
|
--homedir "$GPGHOMEDIR" --quiet --check-trustdb --keyring "${GPGHOMEDIR}/empty.gpg" >"${GPGHOMEDIR}/gpgoutput.log" 2>&1; then
|
|
cat >&2 "${GPGHOMEDIR}/gpgoutput.log"
|
|
false
|
|
fi
|
|
|
|
# We don't usually need a secret keyring, of course, but
|
|
# for advanced operations, we might really need a secret keyring after all
|
|
if [ -n "$FORCED_SECRET_KEYRING" ] && [ -r "$FORCED_SECRET_KEYRING" ]; then
|
|
if ! aptkey_execute "$GPG" -v --batch --import "$FORCED_SECRET_KEYRING" >"${GPGHOMEDIR}/gpgoutput.log" 2>&1; then
|
|
# already imported keys cause gpg1 to fail for some reason… ignore this error
|
|
if ! grep -q 'already in secret keyring' "${GPGHOMEDIR}/gpgoutput.log"; then
|
|
cat >&2 "${GPGHOMEDIR}/gpgoutput.log"
|
|
false
|
|
fi
|
|
fi
|
|
else
|
|
# and then, there are older versions of gpg which panic and implode
|
|
# if there isn't one available - and writeable for imports
|
|
# and even if not output is littered with the creation of a secring,
|
|
# so lets call import once to have it create what it wants in silence
|
|
echo -n | aptkey_execute "$GPG" --batch --import >/dev/null 2>&1 || true
|
|
fi
|
|
}
|
|
|
|
warn_on_script_usage() {
|
|
if [ -n "$APT_KEY_DONT_WARN_ON_DANGEROUS_USAGE" ]; then
|
|
return
|
|
fi
|
|
# (Maintainer) scripts should not be using apt-key
|
|
if [ -n "$DPKG_MAINTSCRIPT_PACKAGE" ]; then
|
|
echo >&2 "Warning: apt-key should not be used in scripts (called from $DPKG_MAINTSCRIPT_NAME maintainerscript of the package ${DPKG_MAINTSCRIPT_PACKAGE})"
|
|
elif [ ! -t 1 ]; then
|
|
echo >&2 "Warning: apt-key output should not be parsed (stdout is not a terminal)"
|
|
fi
|
|
}
|
|
|
|
if [ "$command" != 'help' ] && [ "$command" != 'verify' ]; then
|
|
prepare_gpg_home
|
|
fi
|
|
|
|
case "$command" in
|
|
add)
|
|
warn_on_script_usage
|
|
requires_root
|
|
setup_merged_keyring
|
|
aptkey_execute "$GPG" --quiet --batch --import "$@"
|
|
merge_back_changes
|
|
aptkey_echo "OK"
|
|
;;
|
|
del|rm|remove)
|
|
# no script warning here as removing 'add' usage needs 'del' for cleanup
|
|
requires_root
|
|
foreach_keyring_do 'remove_key_from_keyring' "$@"
|
|
aptkey_echo "OK"
|
|
;;
|
|
update)
|
|
warn_on_script_usage
|
|
requires_root
|
|
setup_merged_keyring
|
|
update
|
|
merge_back_changes
|
|
;;
|
|
net-update)
|
|
requires_root
|
|
setup_merged_keyring
|
|
net_update
|
|
merge_back_changes
|
|
;;
|
|
list|finger*)
|
|
warn_on_script_usage
|
|
foreach_keyring_do 'list_keys_in_keyring' --fingerprint "$@"
|
|
;;
|
|
export|exportall)
|
|
warn_on_script_usage
|
|
merge_all_trusted_keyrings_into_pubring
|
|
aptkey_execute "$GPG_SH" --keyring "${GPGHOMEDIR}/pubring.gpg" --armor --export "$@"
|
|
;;
|
|
adv*)
|
|
warn_on_script_usage
|
|
setup_merged_keyring
|
|
aptkey_echo "Executing: $GPG" "$@"
|
|
aptkey_execute "$GPG" "$@"
|
|
merge_back_changes
|
|
;;
|
|
verify)
|
|
GPGV=''
|
|
eval $(apt-config shell GPGV Apt::Key::gpgvcommand)
|
|
if [ -n "$GPGV" ] && command_available "$GPGV"; then true;
|
|
elif command_available 'gpgv'; then GPGV='gpgv';
|
|
elif command_available 'gpgv2'; then GPGV='gpgv2';
|
|
elif command_available 'gpgv1'; then GPGV='gpgv1';
|
|
else
|
|
apt_error 'gpgv, gpgv2 or gpgv1 required for verification, but neither seems installed'
|
|
exit 29
|
|
fi
|
|
# for a forced keyid we need gpg --export, so full wrapping required
|
|
if [ -n "$FORCED_KEYID" ]; then
|
|
prepare_gpg_home
|
|
else
|
|
create_gpg_home
|
|
fi
|
|
setup_merged_keyring
|
|
if [ -n "$FORCED_KEYRING" ]; then
|
|
"$GPGV" --homedir "${GPGHOMEDIR}" --keyring "$(dearmor_filename "${FORCED_KEYRING}")" --ignore-time-conflict "$@"
|
|
else
|
|
"$GPGV" --homedir "${GPGHOMEDIR}" --keyring "${GPGHOMEDIR}/pubring.gpg" --ignore-time-conflict "$@"
|
|
fi
|
|
;;
|
|
help)
|
|
usage
|
|
;;
|
|
*)
|
|
usage
|
|
exit 1
|
|
;;
|
|
esac
|