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| Current Path : /usr/bin/ | |
| | Current File : //usr/bin/apt-key |
#!/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 "$(apt-config shell ARCHIVE_KEYRING_URI APT::Key::ArchiveKeyringURI)"
aptkey_echo() { echo "$@"; }
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 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="$2"
if [ ! -f "$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 "$ARCHIVE_KEYRING_URI" ]; then
apt_error 'Your distribution is not supported in net-update as no uri for the archive-keyring is set'
exit 1
fi
# in theory we would need to depend on wget for this, but this feature
# isn't useable in debian anyway as we have no keyring uri nor a master key
if ! command_available 'wget'; then
apt_error 'wget is required for a network-based update, but it is not installed'
exit 1
fi
if [ ! -d "${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 --silent --bytes=1 - "$1"; then
true
elif printf '\230' | cmp --silent --bytes=1 - "$1"; then
true
elif printf '\306' | cmp --silent --bytes=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
$ACTION "$TRUSTEDFILE" "$@"
else
# otherwise all known keyrings are up for inspection
if accessible_file_exists "$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" "$TO"
fi
fi
fi
}
dearmor_keyring() {
# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=831409#67
# The awk script is more complex through to skip surrounding garbage and
# to support multiple keys in one file (old gpgs generate version headers
# which get printed with the original and hence result in garbage input for base64
awk '/^-----BEGIN/{ x = 1; }
/^$/{ 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
TRUSTEDFILE="$1"
FORCED_KEYRING="$1"
;;
--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="$TRUSTEDFILE"; fi; }
;;
--fakeroot)
requires_root() { true; }
;;
--quiet)
aptkey_echo() { true; }
;;
--debug1)
# some cmds like finger redirect stderr to /dev/null …
aptkey_execute() { echo 'EXEC:' "$@"; 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
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"
}
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
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