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#!/bin/sh set -e unset GREP_OPTIONS GPGHOMEDIR CURRENTTRAP export IFS="$(printf "\n\b")" MASTER_KEYRING='/usr/share/keyrings/ubuntu-master-keyring.gpg' eval "$(apt-config shell MASTER_KEYRING APT::Key::MasterKeyring)" ARCHIVE_KEYRING='/usr/share/keyrings/ubuntu-archive-keyring.gpg' eval "$(apt-config shell ARCHIVE_KEYRING APT::Key::ArchiveKeyring)" REMOVED_KEYS='/usr/share/keyrings/ubuntu-archive-removed-keys.gpg' eval "$(apt-config shell REMOVED_KEYS APT::Key::RemovedKeys)" ARCHIVE_KEYRING_URI='http://archive.ubuntu.com/ubuntu/project/ubuntu-archive-keyring.gpg' eval "$(apt-config shell ARCHIVE_KEYRING_URI APT::Key::ArchiveKeyringURI)" aptkey_echo() { echo "$@"; } find_gpgv_status_fd() { while [ -n "$1" ]; do if [ "$1" = '--status-fd' ]; then shift echo "$1" break fi shift done } GPGSTATUSFD="$(find_gpgv_status_fd "$@")" apt_warn() { if [ -z "$GPGHOMEDIR" ]; then echo >&2 'W:' "$@" else echo 'W:' "$@" > "${GPGHOMEDIR}/aptwarnings.log" fi if [ -n "$GPGSTATUSFD" ]; then echo >&${GPGSTATUSFD} '[APTKEY:] WARNING' "$@" fi } apt_error() { if [ -z "$GPGHOMEDIR" ]; then echo >&2 'E:' "$@" else echo 'E:' "$@" > "${GPGHOMEDIR}/aptwarnings.log" fi if [ -n "$GPGSTATUSFD" ]; then echo >&${GPGSTATUSFD} '[APTKEY:] ERROR' "$@" fi } cleanup_gpg_home() { if [ -z "$GPGHOMEDIR" ]; then return; fi if [ -s "$GPGHOMEDIR/aptwarnings.log" ]; then cat >&2 "$GPGHOMEDIR/aptwarnings.log" fi if command_available 'gpgconf'; then GNUPGHOME="${GPGHOMEDIR}" gpgconf --kill all >/dev/null 2>&1 || true fi rm -rf "$GPGHOMEDIR" } # gpg needs (in different versions more or less) files to function correctly, # so we give it its own homedir and generate some valid content for it later on create_gpg_home() { # for cases in which we want to cache a homedir due to expensive setup if [ -n "$GPGHOMEDIR" ]; then return fi if [ -n "$TMPDIR" ]; then # tmpdir is a directory and current user has rwx access to it # same tests as in apt-pkg/contrib/fileutl.cc GetTempDir() if [ ! -d "$TMPDIR" ] || [ ! -r "$TMPDIR" ] || [ ! -w "$TMPDIR" ] || [ ! -x "$TMPDIR" ]; then unset TMPDIR fi fi GPGHOMEDIR="$(mktemp --directory --tmpdir 'apt-key-gpghome.XXXXXXXXXX')" CURRENTTRAP="${CURRENTTRAP} cleanup_gpg_home;" trap "${CURRENTTRAP}" 0 HUP INT QUIT ILL ABRT FPE SEGV PIPE TERM if [ -z "$GPGHOMEDIR" ]; then apt_error "Could not create temporary gpg home directory in $TMPDIR (wrong permissions?)" exit 28 fi chmod 700 "$GPGHOMEDIR" } requires_root() { if [ "$(id -u)" -ne 0 ]; then apt_error "This command can only be used by root." exit 1 fi } command_available() { if [ -x "$1" ]; then return 0; fi command -v "$1" >/dev/null # required by policy, see #747320 } escape_shell() { echo "$@" | sed -e "s#'#'\"'\"'#g" } get_fingerprints_of_keyring() { aptkey_execute "$GPG_SH" --keyring "$1" --with-colons --fingerprint | while read publine; do # search for a public key if [ "${publine%%:*}" != 'pub' ]; then continue; fi # search for the associated fingerprint (should be the very next line) while read fprline; do if [ "${fprline%%:*}" = 'sub' ]; then break; # should never happen elif [ "${fprline%%:*}" != 'fpr' ]; then continue; fi echo "$fprline" | cut -d':' -f 10 done # order in the keyring shouldn't be important done | sort } add_keys_with_verify_against_master_keyring() { ADD_KEYRING="$1" MASTER="$2" if [ ! -f "$ADD_KEYRING" ]; then apt_error "Keyring '$ADD_KEYRING' to be added not found" return fi if [ ! -f "$MASTER" ]; then apt_error "Master-Keyring '$MASTER' not found" return fi # when adding new keys, make sure that the archive-master-keyring # is honored. so: # all keys that are exported must have a valid signature # from a key in the $distro-master-keyring add_keys="$(get_fingerprints_of_keyring "$ADD_KEYRING")" all_add_keys="$(aptkey_execute "$GPG_SH" --keyring "$ADD_KEYRING" --with-colons --list-keys | grep ^[ps]ub | cut -d: -f5)" master_keys="$(aptkey_execute "$GPG_SH" --keyring "$MASTER" --with-colons --list-keys | grep ^pub | cut -d: -f5)" # ensure there are no colisions LP: #857472 for all_add_key in $all_add_keys; do for master_key in $master_keys; do if [ "$all_add_key" = "$master_key" ]; then echo >&2 "Keyid collision for '$all_add_key' detected, operation aborted" return 1 fi done done for add_key in $add_keys; do # export the add keyring one-by-one local TMP_KEYRING="${GPGHOMEDIR}/tmp-keyring.gpg" aptkey_execute "$GPG_SH" --batch --yes --keyring "$ADD_KEYRING" --output "$TMP_KEYRING" --export "$add_key" if ! aptkey_execute "$GPG_SH" --batch --yes --keyring "$TMP_KEYRING" --import "$MASTER" > "${GPGHOMEDIR}/gpgoutput.log" 2>&1; then cat >&2 "${GPGHOMEDIR}/gpgoutput.log" false fi # check if signed with the master key and only add in this case ADDED=0 for master_key in $master_keys; do if aptkey_execute "$GPG_SH" --keyring "$TMP_KEYRING" --check-sigs --with-colons "$add_key" \ | grep '^sig:!:' | cut -d: -f5 | grep -q "$master_key"; then aptkey_execute "$GPG_SH" --batch --yes --keyring "$ADD_KEYRING" --export "$add_key" \ | aptkey_execute "$GPG" --batch --yes --import ADDED=1 fi done if [ $ADDED = 0 ]; then echo >&2 "Key '$add_key' not added. It is not signed with a master key" fi rm -f "${TMP_KEYRING}" done } # update the current archive signing keyring from a network URI # the archive-keyring keys needs to be signed with the master key # (otherwise it does not make sense from a security POV) net_update() { local APT_DIR='/' eval $(apt-config shell APT_DIR Dir) # Disabled for now as code is insecure (LP: #1013639 (and 857472, 1013128)) APT_KEY_NET_UPDATE_ENABLED="" eval $(apt-config shell APT_KEY_NET_UPDATE_ENABLED APT::Key::Net-Update-Enabled) if [ -z "$APT_KEY_NET_UPDATE_ENABLED" ]; then exit 1 fi if [ -z "$ARCHIVE_KEYRING_URI" ]; then apt_error 'Your distribution is not supported in net-update as no uri for the archive-keyring is set' exit 1 fi # in theory we would need to depend on wget for this, but this feature # isn't usable in debian anyway as we have no keyring uri nor a master key if ! command_available 'wget'; then apt_error 'wget is required for a network-based update, but it is not installed' exit 1 fi if [ ! -d "${APT_DIR}/var/lib/apt/keyrings" ]; then mkdir -p "${APT_DIR}/var/lib/apt/keyrings" fi keyring="${APT_DIR}/var/lib/apt/keyrings/$(basename "$ARCHIVE_KEYRING_URI")" old_mtime=0 if [ -e $keyring ]; then old_mtime=$(stat -c %Y "$keyring") fi (cd "${APT_DIR}/var/lib/apt/keyrings"; wget --timeout=90 -q -N "$ARCHIVE_KEYRING_URI") if [ ! -e "$keyring" ]; then return fi new_mtime=$(stat -c %Y "$keyring") if [ $new_mtime -ne $old_mtime ]; then aptkey_echo "Checking for new archive signing keys now" add_keys_with_verify_against_master_keyring "$keyring" "$MASTER_KEYRING" fi } update() { if [ -z "$APT_KEY_DONT_WARN_ON_DANGEROUS_USAGE" ]; then echo >&2 "Warning: 'apt-key update' is deprecated and should not be used anymore!" if [ -z "$ARCHIVE_KEYRING" ]; then echo >&2 "Note: In your distribution this command is a no-op and can therefore be removed safely." exit 0 fi fi if [ ! -f "$ARCHIVE_KEYRING" ]; then apt_error "Can't find the archive-keyring (Is the ubuntu-keyring package installed?)" exit 1 fi # add new keys from the package; # we do not use add_keys_with_verify_against_master_keyring here, # because "update" is run on regular package updates. A # attacker might as well replace the master-archive-keyring file # in the package and add his own keys. so this check wouldn't # add any security. we *need* this check on net-update though import_keyring_into_keyring "$ARCHIVE_KEYRING" '' && cat "${GPGHOMEDIR}/gpgoutput.log" if [ -r "$REMOVED_KEYS" ]; then # remove no-longer supported/used keys get_fingerprints_of_keyring "$(dearmor_filename "$REMOVED_KEYS")" | while read key; do foreach_keyring_do 'remove_key_from_keyring' "$key" done else apt_warn "Removed keys keyring '$REMOVED_KEYS' missing or not readable" fi } remove_key_from_keyring() { local KEYRINGFILE="$1" shift # non-existent keyrings have by definition no keys if [ ! -e "$KEYRINGFILE" ]; then return fi local FINGERPRINTS="${GPGHOMEDIR}/keyringfile.keylst" local DEARMOR="$(dearmor_filename "$KEYRINGFILE")" get_fingerprints_of_keyring "$DEARMOR" > "$FINGERPRINTS" for KEY in "$@"; do # strip leading 0x, if present: KEY="$(echo "${KEY#0x}" | tr -d ' ')" # check if the key is in this keyring if ! grep -iq "^[0-9A-F]*${KEY}$" "$FINGERPRINTS"; then continue fi if [ ! -w "$KEYRINGFILE" ]; then apt_warn "Key ${KEY} is in keyring ${KEYRINGFILE}, but can't be removed as it is read only." continue fi # check if it is the only key in the keyring and if so remove the keyring altogether if [ '1' = "$(uniq "$FINGERPRINTS" | wc -l)" ]; then mv -f "$KEYRINGFILE" "${KEYRINGFILE}~" # behave like gpg return fi # we can't just modify pointed to files as these might be in /usr or something local REALTARGET if [ -L "$DEARMOR" ]; then REALTARGET="$(readlink -f "$DEARMOR")" mv -f "$DEARMOR" "${DEARMOR}.dpkg-tmp" cp -a "$REALTARGET" "$DEARMOR" fi # delete the key from the keyring aptkey_execute "$GPG_SH" --keyring "$DEARMOR" --batch --delete-keys --yes "$KEY" if [ -n "$REALTARGET" ]; then # the real backup is the old link, not the copy we made mv -f "${DEARMOR}.dpkg-tmp" "${DEARMOR}~" fi if [ "$DEARMOR" != "$KEYRINGFILE" ]; then mv -f "$KEYRINGFILE" "${KEYRINGFILE}~" create_new_keyring "$KEYRINGFILE" aptkey_execute "$GPG_SH" --keyring "$DEARMOR" --armor --export > "$KEYRINGFILE" fi get_fingerprints_of_keyring "$DEARMOR" > "$FINGERPRINTS" done } accessible_file_exists() { if ! test -s "$1"; then return 1 fi if test -r "$1"; then return 0 fi apt_warn "The key(s) in the keyring $1 are ignored as the file is not readable by user '$USER' executing apt-key." return 1 } is_supported_keyring() { # empty files are always supported if ! test -s "$1"; then return 0 fi local FILEEXT="${1##*.}" if [ "$FILEEXT" = 'gpg' ]; then # 0x98, 0x99 and 0xC6 via octal as hex isn't supported by dashs printf if printf '\231' | cmp -s -n 1 - "$1"; then true elif printf '\230' | cmp -s -n 1 - "$1"; then true elif printf '\306' | cmp -s -n 1 - "$1"; then true else apt_warn "The key(s) in the keyring $1 are ignored as the file has an unsupported filetype." return 1 fi elif [ "$FILEEXT" = 'asc' ]; then true #dearmor_filename will deal with them else # most callers ignore unsupported extensions silently apt_warn "The key(s) in the keyring $1 are ignored as the file has an unsupported filename extension." return 1 fi return 0 } foreach_keyring_do() { local ACTION="$1" shift # if a --keyring was given, just work on this one if [ -n "$FORCED_KEYRING" ]; then $ACTION "$FORCED_KEYRING" "$@" else # otherwise all known keyrings are up for inspection if accessible_file_exists "$TRUSTEDFILE" && is_supported_keyring "$TRUSTEDFILE"; then $ACTION "$TRUSTEDFILE" "$@" fi local TRUSTEDPARTS="/etc/apt/trusted.gpg.d" eval "$(apt-config shell TRUSTEDPARTS Dir::Etc::TrustedParts/d)" if [ -d "$TRUSTEDPARTS" ]; then TRUSTEDPARTS="$(readlink -f "$TRUSTEDPARTS")" local TRUSTEDPARTSLIST="$(cd /; find "$TRUSTEDPARTS" -mindepth 1 -maxdepth 1 $ -name '*.gpg' -o -name '*.asc' $)" for trusted in $(echo "$TRUSTEDPARTSLIST" | sort); do if accessible_file_exists "$trusted" && is_supported_keyring "$trusted"; then $ACTION "$trusted" "$@" fi done fi fi } list_keys_in_keyring() { local KEYRINGFILE="$1" shift # fingerprint and co will fail if key isn't in this keyring aptkey_execute "$GPG_SH" --keyring "$(dearmor_filename "$KEYRINGFILE")" "$@" > "${GPGHOMEDIR}/gpgoutput.log" 2> "${GPGHOMEDIR}/gpgoutput.err" || true if [ ! -s "${GPGHOMEDIR}/gpgoutput.log" ]; then return fi # we fake gpg header here to refer to the real asc file rather than a temp file if [ "${KEYRINGFILE##*.}" = 'asc' ]; then if expr match "$(sed -n '2p' "${GPGHOMEDIR}/gpgoutput.log")" '^-\+$' >/dev/null 2>&1; then echo "$KEYRINGFILE" echo "$KEYRINGFILE" | sed 's#[^-]#-#g' sed '1,2d' "${GPGHOMEDIR}/gpgoutput.log" || true else cat "${GPGHOMEDIR}/gpgoutput.log" fi else cat "${GPGHOMEDIR}/gpgoutput.log" fi if [ -s "${GPGHOMEDIR}/gpgoutput.err" ]; then cat >&2 "${GPGHOMEDIR}/gpgoutput.err" fi } export_key_from_to() { local FROM="$1" local TO="$2" shift 2 if ! aptkey_execute "$GPG_SH" --keyring "$(dearmor_filename "$FROM")" --export "$@" > "$TO" 2> "${GPGHOMEDIR}/gpgoutput.log"; then cat >&2 "${GPGHOMEDIR}/gpgoutput.log" false else chmod 0644 -- "$TO" fi } import_keyring_into_keyring() { local FROM="${1:-${GPGHOMEDIR}/pubring.gpg}" local TO="${2:-${GPGHOMEDIR}/pubring.gpg}" shift 2 rm -f "${GPGHOMEDIR}/gpgoutput.log" # the idea is simple: We take keys from one keyring and copy it to another # we do this with so many checks in between to ensure that WE control the # creation, so we know that the (potentially) created $TO keyring is a # simple keyring rather than a keybox as gpg2 would create it which in turn # can't be read by gpgv. # BEWARE: This is designed more in the way to work with the current # callers, than to have a well defined it would be easy to add new callers to. if [ ! -s "$TO" ]; then if [ -s "$FROM" ]; then if [ -z "$2" ]; then local OPTS if [ "${TO##*.}" = 'asc' ]; then OPTS='--armor' fi export_key_from_to "$(dearmor_filename "$FROM")" "$TO" $OPTS ${1:+"$1"} else create_new_keyring "$TO" fi else create_new_keyring "$TO" fi elif [ -s "$FROM" ]; then local EXPORTLIMIT="$1" if [ -n "$1$2" ]; then shift; fi local DEARMORTO="$(dearmor_filename "$TO")" if ! aptkey_execute "$GPG_SH" --keyring "$(dearmor_filename "$FROM")" --export ${EXPORTLIMIT:+"$EXPORTLIMIT"} \ | aptkey_execute "$GPG_SH" --keyring "$DEARMORTO" --batch --import "$@" > "${GPGHOMEDIR}/gpgoutput.log" 2>&1; then cat >&2 "${GPGHOMEDIR}/gpgoutput.log" false fi if [ "$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" "$TO" fi fi fi } dearmor_keyring() { # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=831409#67 # The awk script is more complex through to skip surrounding garbage and # to support multiple keys in one file (old gpgs generate version headers # which get printed with the original and hence result in garbage input for base64 awk '{ gsub(/\r/,"") } /^-----BEGIN/{ x = 1; } /^$/{ 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 $(apt-config shell TRUSTEDFILE Dir::Etc::Trusted/f) if [ "$APT_KEY_NO_LEGACY_KEYRING" ]; then TRUSTEDFILE="/dev/null" fi 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 -E -q 'gpg|gnupg'; then cat >&2 <<EOF Warning: The $DPKG_MAINTSCRIPT_NAME maintainerscript of the package $DPKG_MAINTSCRIPT_PACKAGE Warning: seems to use apt-key (provided by apt) without depending on gpg, gnupg, or gnupg2. Warning: This will BREAK in the future and should be fixed by the package maintainer(s). Note: Check first if apt-key functionality is needed at all - it probably isn't! EOF fi fi eval "$(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 ${DPKG_MAINTSCRIPT_PACKAGE})" fi echo >&2 "Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8))." } warn_outside_maintscript() { # In del, we want to warn in interactive use, but not inside maintainer # scripts, so as to give people a chance to migrate keyrings. # # FIXME: We should always warn starting in 2022. if [ -z "$DPKG_MAINTSCRIPT_PACKAGE" ]; then echo >&2 "Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8))." 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 "$@" merge_back_changes aptkey_echo "OK" ;; del|rm|remove) # no script warning here as removing 'add' usage needs 'del' for cleanup warn_outside_maintscript requires_root foreach_keyring_do 'remove_key_from_keyring' "$@" aptkey_echo "OK" ;; update) warn_on_script_usage requires_root setup_merged_keyring update merge_back_changes ;; net-update) warn_on_script_usage 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='' ASSERT_PUBKEY_ALGO='' eval $(apt-config shell GPGV Apt::Key::gpgvcommand ASSERT_PUBKEY_ALGO Apt::Key::assert-pubkey-algo) if [ -n "$GPGV" ] && command_available "$GPGV"; then true; elif command_available 'gpgv'; then GPGV='gpgv'; elif command_available 'gpgv2'; then GPGV='gpgv2'; elif command_available 'gpgv1'; then GPGV='gpgv1'; else apt_error 'gpgv, gpgv2 or gpgv1 required for verification, but neither seems installed' exit 29 fi GPGV_ARGS="" if [ "$ASSERT_PUBKEY_ALGO" ]; then test="$(LC_ALL=C.UTF-8 "$GPGV" --assert-pubkey-algo 2>&1 || :)" case "$test" in *"missing argument"*) GPGV_ARGS="--assert-pubkey-algo=$ASSERT_PUBKEY_ALGO" ;; *[Ii]"nvalid option"*"assert-pubkey-algo"*) ;; *) apt_warn "Unknown response from gpgv to --assert-pubkey-algo check: $test" ;; esac fi # for a forced keyid we need gpg --export, so full wrapping required if [ -n "$FORCED_KEYID" ]; then prepare_gpg_home else create_gpg_home fi setup_merged_keyring if [ -n "$FORCED_KEYRING" ]; then "$GPGV" $GPGV_ARGS --homedir "${GPGHOMEDIR}" --keyring "$(dearmor_filename "${FORCED_KEYRING}")" --ignore-time-conflict "$@" else "$GPGV" $GPGV_ARGS --homedir "${GPGHOMEDIR}" --keyring "${GPGHOMEDIR}/pubring.gpg" --ignore-time-conflict "$@" fi ;; help) usage ;; *) usage exit 1 ;; esac