set -e
unset GREP_OPTIONS
-
-GPG_CMD="gpg --ignore-time-conflict --no-options --no-default-keyring"
-
-# 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
-GPGHOMEDIR="$(mktemp -d)"
-CURRENTTRAP="${CURRENTTRAP} rm -rf '${GPGHOMEDIR}';"
-trap "${CURRENTTRAP}" 0 HUP INT QUIT ILL ABRT FPE SEGV PIPE TERM
-chmod 700 "$GPGHOMEDIR"
-# We don't use a secret keyring, of course, but gpg panics and
-# implodes if there isn't one available - and writeable for imports
-SECRETKEYRING="${GPGHOMEDIR}/secring.gpg"
-touch $SECRETKEYRING
-GPG_CMD="$GPG_CMD --homedir $GPGHOMEDIR"
-# create the trustdb with an (empty) dummy keyring
-# older gpgs required it, newer gpgs even warn that it isn't needed,
-# but require it nontheless for some commands, so we just play safe
-# here for the foreseeable future and create a dummy one
-$GPG_CMD --quiet --check-trustdb --keyring $SECRETKEYRING >/dev/null 2>&1
-# tell gpg that it shouldn't try to maintain a trustdb file
-GPG_CMD="$GPG_CMD --no-auto-check-trustdb --trust-model always"
-
-GPG="$GPG_CMD"
-
-APT_DIR="/"
-eval $(apt-config shell APT_DIR Dir)
+export IFS="$(printf "\n\b")"
MASTER_KEYRING='&keyring-master-filename;'
-eval $(apt-config shell MASTER_KEYRING APT::Key::MasterKeyring)
+eval "$(apt-config shell MASTER_KEYRING APT::Key::MasterKeyring)"
ARCHIVE_KEYRING='&keyring-filename;'
-eval $(apt-config shell ARCHIVE_KEYRING APT::Key::ArchiveKeyring)
+eval "$(apt-config shell ARCHIVE_KEYRING APT::Key::ArchiveKeyring)"
REMOVED_KEYS='&keyring-removed-filename;'
-eval $(apt-config shell REMOVED_KEYS APT::Key::RemovedKeys)
+eval "$(apt-config shell REMOVED_KEYS APT::Key::RemovedKeys)"
ARCHIVE_KEYRING_URI='&keyring-uri;'
-eval $(apt-config shell ARCHIVE_KEYRING_URI APT::Key::ArchiveKeyringURI)
-TMP_KEYRING=${APT_DIR}/var/lib/apt/keyrings/maybe-import-keyring.gpg
+eval "$(apt-config shell ARCHIVE_KEYRING_URI APT::Key::ArchiveKeyringURI)"
+
+aptkey_echo() { echo "$@"; }
requires_root() {
if [ "$(id -u)" -ne 0 ]; then
- echo >&1 "ERROR: This command can only be used by root."
+ echo >&2 "ERROR: This command can only be used by root."
exit 1
fi
}
-# gpg defaults to mode 0600 for new keyrings. Create one with 0644 instead.
-init_keyring() {
- for path; do
- if ! [ -e "$path" ]; then
- touch -- "$path"
- chmod 0644 -- "$path"
- fi
+command_available() {
+ if [ -x "$1" ]; then return 0; fi
+ # command -v "$1" >/dev/null 2>&1 # not required by policy, see #747320
+ # which "$1" >/dev/null 2>&1 # is in debianutils (essential) but not on non-debian systems
+ local OLDIFS="$IFS"
+ IFS=:
+ for p in $PATH; do
+ if [ -x "${p}/${1}" ]; then
+ IFS="$OLDIFS"
+ return 0
+ fi
done
+ IFS="$OLDIFS"
+ return 1
+}
+
+escape_shell() {
+ echo "$@" | 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
+ ADD_KEYRING="$1"
+ MASTER="$2"
if [ ! -f "$ADD_KEYRING" ]; then
- echo "ERROR: '$ADD_KEYRING' not found"
+ echo >&2 "ERROR: '$ADD_KEYRING' not found"
return
- fi
+ fi
if [ ! -f "$MASTER" ]; then
- echo "ERROR: '$MASTER' not found"
+ echo >&2 "ERROR: '$MASTER' not found"
return
fi
# is honored. so:
# all keys that are exported must have a valid signature
# from a key in the $distro-master-keyring
- add_keys=`$GPG_CMD --keyring $ADD_KEYRING --with-colons --list-keys | grep ^pub | cut -d: -f5`
- all_add_keys=`$GPG_CMD --keyring $ADD_KEYRING --with-colons --list-keys | grep ^[ps]ub | cut -d: -f5`
- master_keys=`$GPG_CMD --keyring $MASTER --with-colons --list-keys | grep ^pub | cut -d: -f5`
+ add_keys="$(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
fi
done
done
-
+
for add_key in $add_keys; do
# export the add keyring one-by-one
- rm -f $TMP_KEYRING
- $GPG_CMD --keyring $ADD_KEYRING --output $TMP_KEYRING --export $add_key
- # check if signed with the master key and only add in this case
- ADDED=0
+ local TMP_KEYRING="${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 $GPG_CMD --keyring $MASTER --keyring $TMP_KEYRING --check-sigs --with-colons $add_key | grep '^sig:!:' | cut -d: -f5 | grep -q $master_key; then
- $GPG --import $TMP_KEYRING
+ if aptkey_execute "$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
- rm -f $TMP_KEYRING
}
# 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)
echo >&2 "ERROR: Your distribution is not supported in net-update as no uri for the archive-keyring is set"
exit 1
fi
- requires_root
# in theory we would need to depend on wget for this, but this feature
# isn't useable in debian anyway as we have no keyring uri nor a master key
- if ! which wget >/dev/null 2>&1; then
+ if ! command_available 'wget'; then
echo >&2 "ERROR: an installed wget is required for a network-based update"
exit 1
fi
- if [ ! -d ${APT_DIR}/var/lib/apt/keyrings ]; then
- mkdir -p ${APT_DIR}/var/lib/apt/keyrings
+ if [ ! -d "${APT_DIR}/var/lib/apt/keyrings" ]; then
+ mkdir -p "${APT_DIR}/var/lib/apt/keyrings"
fi
- keyring=${APT_DIR}/var/lib/apt/keyrings/$(basename $ARCHIVE_KEYRING_URI)
+ keyring="${APT_DIR}/var/lib/apt/keyrings/$(basename "$ARCHIVE_KEYRING_URI")"
old_mtime=0
if [ -e $keyring ]; then
- old_mtime=$(stat -c %Y $keyring)
+ old_mtime=$(stat -c %Y "$keyring")
fi
- (cd ${APT_DIR}/var/lib/apt/keyrings; wget --timeout=90 -q -N $ARCHIVE_KEYRING_URI)
- if [ ! -e $keyring ]; then
+ (cd "${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 $keyring)
+ new_mtime=$(stat -c %Y "$keyring")
if [ $new_mtime -ne $old_mtime ]; then
- echo "Checking for new archive signing keys now"
- add_keys_with_verify_against_master_keyring $keyring $MASTER_KEYRING
+ aptkey_echo "Checking for new archive signing keys now"
+ add_keys_with_verify_against_master_keyring "$keyring" "$MASTER_KEYRING"
fi
}
update() {
- if [ ! -f $ARCHIVE_KEYRING ]; then
+ if [ ! -f "$ARCHIVE_KEYRING" ]; then
echo >&2 "ERROR: Can't find the archive-keyring"
echo >&2 "Is the &keyring-package; package installed?"
exit 1
fi
- requires_root
# add new keys from the package;
# 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
- $GPG_CMD --quiet --batch --keyring $ARCHIVE_KEYRING --export | $GPG --import
+ import_keyring_into_keyring "$ARCHIVE_KEYRING" '' && cat "${GPGHOMEDIR}/gpgoutput.log"
if [ -r "$REMOVED_KEYS" ]; then
# remove no-longer supported/used keys
- keys=`$GPG_CMD --keyring $REMOVED_KEYS --with-colons --list-keys | grep ^pub | cut -d: -f5`
- for key in $keys; do
- if $GPG --list-keys --with-colons | grep ^pub | cut -d: -f5 | grep -q $key; then
- $GPG --quiet --batch --delete-key --yes ${key}
- fi
+ get_fingerprints_of_keyring "$REMOVED_KEYS" | while read key; do
+ foreach_keyring_do 'remove_key_from_keyring' "$key"
done
else
- echo "Warning: removed keys keyring $REMOVED_KEYS missing or not readable" >&2
+ echo >&2 "Warning: removed keys keyring $REMOVED_KEYS missing or not readable"
fi
}
remove_key_from_keyring() {
- local GPG="$GPG_CMD --keyring $1"
- # check if the key is in this keyring: the key id is in the 5 column at the end
- if ! $GPG --with-colons --list-keys 2>&1 | grep -q "^pub:[^:]*:[^:]*:[^:]*:[0-9A-F]\+$2:"; then
- return
+ local KEYRINGFILE="$1"
+ shift
+ # non-existent keyrings have by definition no keys
+ if [ ! -e "$KEYRINGFILE" ]; then
+ return
fi
- if [ ! -w "$1" ]; then
- echo >&2 "Key ${2} is in keyring ${1}, but can't be removed as it is read only."
- return
- fi
- # check if it is the only key in the keyring and if so remove the keyring alltogether
- if [ '1' = "$($GPG --with-colons --list-keys | grep "^pub:[^:]*:[^:]*:[^:]*:[0-9A-F]\+:" | wc -l)" ]; then
- mv -f "$1" "${1}~" # behave like gpg
- return
+
+ for KEY in "$@"; do
+ local FINGERPRINTS="${GPGHOMEDIR}/keyringfile.keylst"
+ get_fingerprints_of_keyring "$KEYRINGFILE" > "$FINGERPRINTS"
+
+ # strip leading 0x, if present:
+ KEY="${KEY#0x}"
+
+ # check if the key is in this keyring
+ if ! grep -iq "^[0-9A-F]*${KEY}$" "$FINGERPRINTS"; then
+ continue
+ fi
+ if [ ! -w "$KEYRINGFILE" ]; then
+ echo >&2 "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" "${KEYRINGFILE}~" # behave like gpg
+ return
+ fi
+ # we can't just modify pointed to files as these might be in /usr or something
+ local REALTARGET
+ if [ -L "$KEYRINGFILE" ]; then
+ REALTARGET="$(readlink -f "$KEYRINGFILE")"
+ mv -f "$KEYRINGFILE" "${KEYRINGFILE}.dpkg-tmp"
+ cp -a "$REALTARGET" "$KEYRINGFILE"
+ fi
+ # delete the key from the keyring
+ aptkey_execute "$GPG_SH" --keyring "$KEYRINGFILE" --batch --delete-keys --yes "$KEY"
+ if [ -n "$REALTARGET" ]; then
+ # the real backup is the old link, not the copy we made
+ mv -f "${KEYRINGFILE}.dpkg-tmp" "${KEYRINGFILE}~"
+ fi
+ done
+}
+
+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" "$@"
+ else
+ # otherwise all known keyrings are up for inspection
+ if [ -s "$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')"
+ for trusted in $(echo "$TRUSTEDPARTSLIST" | sort); do
+ if [ -s "$trusted" ]; then
+ $ACTION "$trusted" "$@"
+ fi
+ done
+ fi
+ fi
+}
+
+run_cmd_on_keyring() {
+ local KEYRINGFILE="$1"
+ shift
+ # fingerprint and co will fail if key isn't in this keyring
+ aptkey_execute "$GPG_SH" --keyring "$KEYRINGFILE" --batch "$@" 2>/dev/null || true
+}
+
+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 "$2" ]; then
+ if ! aptkey_execute "$GPG_SH" --keyring "$FROM" --export ${1:+"$1"} > "$TO" 2> "${GPGHOMEDIR}/gpgoutput.log"; then
+ cat >&2 "${GPGHOMEDIR}/gpgoutput.log"
+ false
+ else
+ chmod 0644 -- "$TO"
+ fi
+ else
+ create_new_keyring "$TO"
+ fi
+ else
+ create_new_keyring "$TO"
+ fi
+ elif [ -s "$FROM" ]; then
+ local EXPORTLIMIT="$1"
+ if [ -n "$1$2" ]; then shift; fi
+ if ! aptkey_execute "$GPG_SH" --keyring "$FROM" --export ${EXPORTLIMIT:+"$EXPORTLIMIT"} \
+ | aptkey_execute "$GPG_SH" --keyring "$TO" --batch --import "$@" > "${GPGHOMEDIR}/gpgoutput.log" 2>&1; then
+ cat >&2 "${GPGHOMEDIR}/gpgoutput.log"
+ false
+ fi
fi
- # we can't just modify pointed to files as these might be in /usr or something
- local REALTARGET
- if [ -L "$1" ]; then
- REALTARGET="$(readlink -f "$1")"
- mv -f "$1" "${1}.dpkg-tmp"
- cp -a "$REALTARGET" "$1"
- ls "$(dirname $1)"
+}
+
+merge_all_trusted_keyrings_into_pubring() {
+ # does the same as:
+ # foreach_keyring_do 'import_keys_from_keyring' "${GPGHOMEDIR}/pubring.gpg"
+ # but without using gpg, just cat and find
+ local PUBRING="$(readlink -f "${GPGHOMEDIR}/pubring.gpg")"
+ # if a --keyring was given, just use this one
+ if [ -n "$FORCED_KEYRING" ]; then
+ if [ -s "$FORCED_KEYRING" ]; then
+ cp --dereference "$FORCED_KEYRING" "$PUBRING"
+ fi
+ else
+ # otherwise all known keyrings are merged
+ local TRUSTEDPARTS="/etc/apt/trusted.gpg.d"
+ eval $(apt-config shell TRUSTEDPARTS Dir::Etc::TrustedParts/d)
+ if [ -d "$TRUSTEDPARTS" ]; then
+ rm -f "$PUBRING"
+ if [ -s "$TRUSTEDFILE" ]; then
+ cat "$TRUSTEDFILE" > "$PUBRING"
+ fi
+ TRUSTEDPARTS="$(readlink -f "$TRUSTEDPARTS")"
+ (cd /; find "$TRUSTEDPARTS" -mindepth 1 -maxdepth 1 -name '*.gpg' -exec cat {} + >> "$PUBRING";)
+ elif [ -s "$TRUSTEDFILE" ]; then
+ cp --dereference "$TRUSTEDFILE" "$PUBRING"
+ fi
fi
- # delete the key from the keyring
- $GPG --batch --delete-key --yes "$2"
- if [ -n "$REALTARGET" ]; then
- # the real backup is the old link, not the copy we made
- mv -f "${1}.dpkg-tmp" "${1}~"
+
+ if [ ! -s "$PUBRING" ]; then
+ touch "$PUBRING"
fi
}
-remove_key() {
- requires_root
+import_keys_from_keyring() {
+ import_keyring_into_keyring "$1" "$2"
+}
+
+merge_keys_into_keyrings() {
+ import_keyring_into_keyring "$2" "$1" '' --import-options 'merge-only'
+}
- # if a --keyring was given, just remove from there
+merge_back_changes() {
if [ -n "$FORCED_KEYRING" ]; then
- remove_key_from_keyring "$FORCED_KEYRING" "$1"
+ # if the keyring was forced merge is already done
+ return
+ fi
+ if [ -s "${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
- # otherwise all known keyrings are up for inspection
- local TRUSTEDFILE="/etc/apt/trusted.gpg"
- eval $(apt-config shell TRUSTEDFILE Apt::GPGV::TrustedKeyring)
- eval $(apt-config shell TRUSTEDFILE Dir::Etc::Trusted/f)
- remove_key_from_keyring "$TRUSTEDFILE" "$1"
- TRUSTEDPARTS="/etc/apt/trusted.gpg.d"
- eval $(apt-config shell TRUSTEDPARTS Dir::Etc::TrustedParts/d)
- if [ -d "$TRUSTEDPARTS" ]; then
- for trusted in $(run-parts --list "$TRUSTEDPARTS" --regex '^.*\.gpg$'); do
- remove_key_from_keyring "$trusted" "$1"
- done
+ create_new_keyring "$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 "$TRUSTEDFILE" ]; then
+ if [ -w "$(dirname "$TRUSTEDFILE")" ]; then
+ touch -- "$TRUSTEDFILE"
+ chmod 0644 -- "$TRUSTEDFILE"
fi
fi
- echo "OK"
}
+aptkey_execute() { sh "$@"; }
usage() {
echo "Usage: apt-key [--keyring file] [command] [arguments]"
shift
TRUSTEDFILE="$1"
FORCED_KEYRING="$1"
- if [ -r "$TRUSTEDFILE" ] || [ "$2" = 'add' ] || [ "$2" = 'adv' ]; then
- GPG="$GPG --keyring $TRUSTEDFILE --primary-keyring $TRUSTEDFILE"
- else
- echo >&2 "Error: The specified keyring »$TRUSTEDFILE« is missing or not readable"
- exit 1
- fi
+ ;;
+ --keyid)
+ shift
+ 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="$TRUSTEDFILE"; fi; }
;;
--fakeroot)
requires_root() { true; }
- shift
;;
+ --quiet)
+ aptkey_echo() { true; }
+ ;;
+ --debug1)
+ # some cmds like finger redirect stderr to /dev/null …
+ aptkey_execute() { echo 'EXEC:' "$@"; sh "$@"; }
+ ;;
+ --debug2)
+ # … other more complicated ones pipe gpg into gpg.
+ aptkey_execute() { echo >&2 'EXEC:' "$@"; sh "$@"; }
+ ;;
--*)
echo >&2 "Unknown option: $1"
usage
*)
break;;
esac
+ shift
done
if [ -z "$TRUSTEDFILE" ]; then
TRUSTEDFILE="/etc/apt/trusted.gpg"
eval $(apt-config shell TRUSTEDFILE Apt::GPGV::TrustedKeyring)
eval $(apt-config shell TRUSTEDFILE Dir::Etc::Trusted/f)
- if [ -r "$TRUSTEDFILE" ]; then
- GPG="$GPG --keyring $TRUSTEDFILE"
- fi
- GPG="$GPG --primary-keyring $TRUSTEDFILE"
- TRUSTEDPARTS="/etc/apt/trusted.gpg.d"
- eval $(apt-config shell TRUSTEDPARTS Dir::Etc::TrustedParts/d)
- if [ -d "$TRUSTEDPARTS" ]; then
- # strip / suffix as gpg will double-slash in that case (#665411)
- STRIPPED_TRUSTEDPARTS="${TRUSTEDPARTS%/}"
- if [ "${STRIPPED_TRUSTEDPARTS}/" = "$TRUSTEDPARTS" ]; then
- TRUSTEDPARTS="$STRIPPED_TRUSTEDPARTS"
- fi
- for trusted in $(run-parts --list "$TRUSTEDPARTS" --regex '^.*\.gpg$'); do
- GPG="$GPG --keyring $trusted"
- done
- fi
fi
command="$1"
fi
shift
-if [ "$command" != "help" ] && ! which gpg >/dev/null 2>&1; then
- echo >&2 "Warning: gnupg does not seem to be installed."
- echo >&2 "Warning: apt-key requires gnupg for most operations."
- echo >&2
+create_gpg_home() {
+ # 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
+ 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 -d)"
+ CURRENTTRAP="${CURRENTTRAP} rm -rf '$(escape_shell "${GPGHOMEDIR}")';"
+ trap "${CURRENTTRAP}" 0 HUP INT QUIT ILL ABRT FPE SEGV PIPE TERM
+ chmod 700 "$GPGHOMEDIR"
+}
+
+prepare_gpg_home() {
+ # crude detection if we are called from a maintainerscript where the
+ # package depends on gnupg or not. We accept recommends here as
+ # well as the script hopefully uses apt-key optionally then like e.g.
+ # debian-archive-keyring for (upgrade) cleanup did
+ if [ -n "$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"
+ else
+ echo >&2 "Error: gnupg or gnupg2 do not seem to be installed,"
+ echo >&2 "Error: but apt-key requires gnupg or gnupg2 for this operation."
+ echo >&2
+ exit 255
+ fi
+
+ create_gpg_home
+
+ # 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
+
+ # 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="$GPG_SH"
+
+ # We don't usually need a secret keyring, of course, but
+ # for advanced operations, we might really need a secret keyring after all
+ if [ -n "$FORCED_SECRET_KEYRING" ] && [ -r "$FORCED_SECRET_KEYRING" ]; then
+ if ! aptkey_execute "$GPG" -v --batch --import "$FORCED_SECRET_KEYRING" >"${GPGHOMEDIR}/gpgoutput.log" 2>&1; then
+ cat >&2 "${GPGHOMEDIR}/gpgoutput.log"
+ false
+ fi
+ else
+ # and then, there are older versions of gpg which panic and implode
+ # if there isn't one available - and writeable for imports
+ # and even if not output is littered with the creation of a secring,
+ # so lets call import once to have it create what it wants in silence
+ echo -n | aptkey_execute "$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)
- requires_root
- init_keyring "$TRUSTEDFILE"
- $GPG --quiet --batch --import "$1"
- echo "OK"
+ warn_on_script_usage
+ requires_root
+ setup_merged_keyring
+ aptkey_execute "$GPG" --quiet --batch --import "$@"
+ merge_back_changes
+ aptkey_echo "OK"
;;
del|rm|remove)
- init_keyring "$TRUSTEDFILE"
- remove_key "$1"
+ # no script warning here as removing 'add' usage needs 'del' for cleanup
+ requires_root
+ foreach_keyring_do 'remove_key_from_keyring' "$@"
+ aptkey_echo "OK"
;;
update)
- init_keyring "$TRUSTEDFILE"
+ warn_on_script_usage
+ requires_root
+ setup_merged_keyring
update
+ merge_back_changes
;;
net-update)
- init_keyring "$TRUSTEDFILE"
+ requires_root
+ setup_merged_keyring
net_update
+ merge_back_changes
+ ;;
+ list|finger*)
+ warn_on_script_usage
+ foreach_keyring_do 'run_cmd_on_keyring' --fingerprint "$@"
+ ;;
+ export|exportall)
+ warn_on_script_usage
+ merge_all_trusted_keyrings_into_pubring
+ aptkey_execute "$GPG_SH" --keyring "${GPGHOMEDIR}/pubring.gpg" --armor --export "$@"
;;
- list)
- init_keyring "$TRUSTEDFILE"
- $GPG --batch --list-keys
- ;;
- finger*)
- init_keyring "$TRUSTEDFILE"
- $GPG --batch --fingerprint
- ;;
- export)
- init_keyring "$TRUSTEDFILE"
- $GPG --armor --export "$1"
- ;;
- exportall)
- init_keyring "$TRUSTEDFILE"
- $GPG --armor --export
- ;;
adv*)
- init_keyring "$TRUSTEDFILE"
- echo "Executing: $GPG $*"
- $GPG $*
- ;;
+ 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 "$GPGV"; then true;
+ elif command_available 'gpgv'; then GPGV='gpgv';
+ elif command_available 'gpgv2'; then GPGV='gpgv2';
+ else
+ echo >&2 'ERROR: gpgv or gpgv2 required for verification'
+ exit 29
+ fi
+ # for a forced keyid we need gpg --export, so full wrapping required
+ if [ -n "$FORCED_KEYID" ]; then
+ prepare_gpg_home
+ else
+ create_gpg_home
+ fi
+ setup_merged_keyring
+ if [ -n "$FORCED_KEYRING" ]; then
+ "$GPGV" --homedir "${GPGHOMEDIR}" --keyring "${FORCED_KEYRING}" --ignore-time-conflict "$@"
+ else
+ "$GPGV" --homedir "${GPGHOMEDIR}" --keyring "${GPGHOMEDIR}/pubring.gpg" --ignore-time-conflict "$@"
+ fi
+ ;;
help)
usage
;;
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