[apt.git] / cmdline / apt-key.in

#!/bin/sh

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 nonetheless 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)

MASTER_KEYRING='&keyring-master-filename;'
eval $(apt-config shell MASTER_KEYRING APT::Key::MasterKeyring)
ARCHIVE_KEYRING='&keyring-filename;'
eval $(apt-config shell ARCHIVE_KEYRING APT::Key::ArchiveKeyring)
REMOVED_KEYS='&keyring-removed-filename;'
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

requires_root() {
	if [ "$(id -u)" -ne 0 ]; then
		echo >&1 "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
    done
}

add_keys_with_verify_against_master_keyring() {
    ADD_KEYRING=$1
    MASTER=$2

    if [ ! -f "$ADD_KEYRING" ]; then
	echo "ERROR: '$ADD_KEYRING' not found"
	return
    fi 
    if [ ! -f "$MASTER" ]; then
	echo "ERROR: '$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 $distro-master-keyring
    add_keys=`$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`

    # 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
        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
	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
		ADDED=1
	    fi
	done
	if [ $ADDED = 0 ]; then
	    echo >&2 "Key '$add_key' not added. It is not signed with a master key"
	fi
    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() {
    # 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
	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
	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 ${APT_DIR}/var/lib/apt/keyrings
    fi
    keyring=${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
	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
	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;

    # 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
    $GPG_CMD --quiet --batch --keyring $ARCHIVE_KEYRING --export | $GPG --import

    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
	done
    else
	echo "Warning: removed keys keyring  $REMOVED_KEYS missing or not readable" >&2
    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
    fi
    if [ ! -w "$1" ]; then
	echo >&2 "Key ${2} is in keyring ${1}, but can't be removed as it is read only."
	return
    fi
    # check if it is the only key in the keyring and if so remove the keyring altogether
    if [ '1' = "$($GPG --with-colons --list-keys | grep "^pub:[^:]*:[^:]*:[^:]*:[0-9A-F]\+:" | wc -l)" ]; then
	mv -f "$1" "${1}~" # 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 "$1" ]; then
	REALTARGET="$(readlink -f "$1")"
	mv -f "$1" "${1}.dpkg-tmp"
	cp -a "$REALTARGET" "$1"
	ls "$(dirname $1)"
    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}~"
    fi
}

remove_key() {
    requires_root

    # if a --keyring was given, just remove from there
    if [ -n "$FORCED_KEYRING" ]; then
	remove_key_from_keyring "$FORCED_KEYRING" "$1"
    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
	fi
    fi
    echo "OK"
}


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="$1"
	 if [ -r "$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
	 shift
	 ;;
      --fakeroot)
	 requires_root() { true; }
	 shift
	 ;;
      --*)
	 echo >&2 "Unknown option: $1"
	 usage
	 exit 1;;
      *)
	 break;;
   esac
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="$1"
if [ -z "$command" ]; then
    usage
    exit 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
fi

case "$command" in
    add)
        requires_root
        init_keyring "$TRUSTEDFILE"
        $GPG --quiet --batch --import "$1"
        echo "OK"
        ;;
    del|rm|remove)
        init_keyring "$TRUSTEDFILE"
	remove_key "$1"
        ;;
    update)
        init_keyring "$TRUSTEDFILE"
	update
	;;
    net-update)
        init_keyring "$TRUSTEDFILE"
	net_update
	;;
    list)
        init_keyring "$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 $*
        ;;
    help)
        usage
        ;;
    *)
        usage
        exit 1
        ;;
esac
Commit	Line	Data
b3d44315 MV	1	#!/bin/sh
	2
	3	set -e
dac074b0	4	unset GREP_OPTIONS
b3d44315	5
f9e64e7b	6	GPG_CMD="gpg --ignore-time-conflict --no-options --no-default-keyring"
248ec5ab	7
5fd25d67 DK	8	# gpg needs (in different versions more or less) files to function correctly,
	9	# so we give it its own homedir and generate some valid content for it
	10	GPGHOMEDIR="$(mktemp -d)"
	11	CURRENTTRAP="${CURRENTTRAP} rm -rf '${GPGHOMEDIR}';"
f9e64e7b	12	trap "${CURRENTTRAP}" 0 HUP INT QUIT ILL ABRT FPE SEGV PIPE TERM
5fd25d67 DK	13	chmod 700 "$GPGHOMEDIR"
5fd25d67 DK	14	# We don't use a secret keyring, of course, but gpg panics and
f9e64e7b	15	# implodes if there isn't one available - and writeable for imports
5fd25d67	16	SECRETKEYRING="${GPGHOMEDIR}/secring.gpg"
f9e64e7b	17	touch $SECRETKEYRING
5fd25d67 DK	18	GPG_CMD="$GPG_CMD --homedir $GPGHOMEDIR"
	19	# create the trustdb with an (empty) dummy keyring
	20	# older gpgs required it, newer gpgs even warn that it isn't needed,
1e3f4083	21	# but require it nonetheless for some commands, so we just play safe
5fd25d67 DK	22	# here for the foreseeable future and create a dummy one
	23	$GPG_CMD --quiet --check-trustdb --keyring $SECRETKEYRING >/dev/null 2>&1
	24	# tell gpg that it shouldn't try to maintain a trustdb file
f9e64e7b DK	25	GPG_CMD="$GPG_CMD --no-auto-check-trustdb --trust-model always"
f9e64e7b DK	26
46e39c8e	27	GPG="$GPG_CMD"
4a242c5b	28
5acf154d MV	29	APT_DIR="/"
	30	eval $(apt-config shell APT_DIR Dir)
	31
5b2c6ddc	32	MASTER_KEYRING='&keyring-master-filename;'
80f3aeb0	33	eval $(apt-config shell MASTER_KEYRING APT::Key::MasterKeyring)
5b2c6ddc	34	ARCHIVE_KEYRING='&keyring-filename;'
80f3aeb0	35	eval $(apt-config shell ARCHIVE_KEYRING APT::Key::ArchiveKeyring)
5b2c6ddc	36	REMOVED_KEYS='&keyring-removed-filename;'
80f3aeb0	37	eval $(apt-config shell REMOVED_KEYS APT::Key::RemovedKeys)
5b2c6ddc	38	ARCHIVE_KEYRING_URI='&keyring-uri;'
f87338d2	39	eval $(apt-config shell ARCHIVE_KEYRING_URI APT::Key::ArchiveKeyringURI)
5acf154d	40	TMP_KEYRING=${APT_DIR}/var/lib/apt/keyrings/maybe-import-keyring.gpg
4a242c5b	41
00c6e1a3 MV	42	requires_root() {
	43	if [ "$(id -u)" -ne 0 ]; then
	44	echo >&1 "ERROR: This command can only be used by root."
	45	exit 1
	46	fi
	47	}
	48
5de34668 JK	49	# gpg defaults to mode 0600 for new keyrings. Create one with 0644 instead.
	50	init_keyring() {
	51	for path; do
	52	if ! [ -e "$path" ]; then
	53	touch -- "$path"
	54	chmod 0644 -- "$path"
	55	fi
	56	done
	57	}
	58
7fbe42c0	59	add_keys_with_verify_against_master_keyring() {
8c56b1e0 MV	60	ADD_KEYRING=$1
8c56b1e0 MV	61	MASTER=$2
f87338d2	62
8c56b1e0 MV	63	if [ ! -f "$ADD_KEYRING" ]; then
	64	echo "ERROR: '$ADD_KEYRING' not found"
	65	return
	66	fi
	67	if [ ! -f "$MASTER" ]; then
	68	echo "ERROR: '$MASTER' not found"
	69	return
	70	fi
	71
	72	# when adding new keys, make sure that the archive-master-keyring
	73	# is honored. so:
3a341a1d MV	74	# all keys that are exported must have a valid signature
3a341a1d MV	75	# from a key in the $distro-master-keyring
8c56b1e0	76	add_keys=`$GPG_CMD --keyring $ADD_KEYRING --with-colons --list-keys \| grep ^pub \| cut -d: -f5`
f87338d2	77	all_add_keys=`$GPG_CMD --keyring $ADD_KEYRING --with-colons --list-keys \| grep ^[ps]ub \| cut -d: -f5`
8c56b1e0	78	master_keys=`$GPG_CMD --keyring $MASTER --with-colons --list-keys \| grep ^pub \| cut -d: -f5`
f87338d2 DK	79
	80	# ensure there are no colisions LP: #857472
	81	for all_add_key in $all_add_keys; do
	82	for master_key in $master_keys; do
	83	if [ "$all_add_key" = "$master_key" ]; then
	84	echo >&2 "Keyid collision for '$all_add_key' detected, operation aborted"
	85	return 1
	86	fi
	87	done
	88	done
	89
8c56b1e0	90	for add_key in $add_keys; do
f87338d2 DK	91	# export the add keyring one-by-one
	92	rm -f $TMP_KEYRING
	93	$GPG_CMD --keyring $ADD_KEYRING --output $TMP_KEYRING --export $add_key
	94	# check if signed with the master key and only add in this case
	95	ADDED=0
8c56b1e0	96	for master_key in $master_keys; do
f87338d2 DK	97	if $GPG_CMD --keyring $MASTER --keyring $TMP_KEYRING --check-sigs --with-colons $add_key \| grep '^sig:!:' \| cut -d: -f5 \| grep -q $master_key; then
f87338d2 DK	98	$GPG --import $TMP_KEYRING
c9bb37c7	99	ADDED=1
8c56b1e0	100	fi
7fbe42c0	101	done
c9bb37c7 MV	102	if [ $ADDED = 0 ]; then
	103	echo >&2 "Key '$add_key' not added. It is not signed with a master key"
	104	fi
8c56b1e0	105	done
f87338d2	106	rm -f $TMP_KEYRING
7fbe42c0	107	}
4a242c5b	108
848ecfa4 MV	109	# update the current archive signing keyring from a network URI
	110	# the archive-keyring keys needs to be signed with the master key
	111	# (otherwise it does not make sense from a security POV)
	112	net_update() {
f87338d2	113	# Disabled for now as code is insecure (LP: #1013639 (and 857472, 1013128))
5acf154d MV	114	APT_KEY_NET_UPDATE_ENABLED=""
	115	eval $(apt-config shell APT_KEY_NET_UPDATE_ENABLED APT::Key::Net-Update-Enabled)
	116	if [ -z "$APT_KEY_NET_UPDATE_ENABLED" ]; then
	117	exit 1
	118	fi
f87338d2	119
848ecfa4	120	if [ -z "$ARCHIVE_KEYRING_URI" ]; then
00c6e1a3	121	echo >&2 "ERROR: Your distribution is not supported in net-update as no uri for the archive-keyring is set"
46e39c8e MV	122	exit 1
46e39c8e MV	123	fi
00c6e1a3	124	requires_root
46e39c8e MV	125	# in theory we would need to depend on wget for this, but this feature
	126	# isn't useable in debian anyway as we have no keyring uri nor a master key
	127	if ! which wget >/dev/null 2>&1; then
00c6e1a3	128	echo >&2 "ERROR: an installed wget is required for a network-based update"
46e39c8e	129	exit 1
848ecfa4	130	fi
5acf154d MV	131	if [ ! -d ${APT_DIR}/var/lib/apt/keyrings ]; then
5acf154d MV	132	mkdir -p ${APT_DIR}/var/lib/apt/keyrings
848ecfa4	133	fi
e5543ea5	134	keyring=${APT_DIR}/var/lib/apt/keyrings/$(basename $ARCHIVE_KEYRING_URI)
93886541 MV	135	old_mtime=0
93886541 MV	136	if [ -e $keyring ]; then
20ba2505	137	old_mtime=$(stat -c %Y $keyring)
93886541	138	fi
5acf154d	139	(cd ${APT_DIR}/var/lib/apt/keyrings; wget --timeout=90 -q -N $ARCHIVE_KEYRING_URI)
93886541 MV	140	if [ ! -e $keyring ]; then
	141	return
	142	fi
20ba2505	143	new_mtime=$(stat -c %Y $keyring)
93886541	144	if [ $new_mtime -ne $old_mtime ]; then
8dd0686e	145	echo "Checking for new archive signing keys now"
93886541 MV	146	add_keys_with_verify_against_master_keyring $keyring $MASTER_KEYRING
93886541 MV	147	fi
848ecfa4 MV	148	}
848ecfa4 MV	149
4a242c5b MV	150	update() {
	151	if [ ! -f $ARCHIVE_KEYRING ]; then
	152	echo >&2 "ERROR: Can't find the archive-keyring"
5b2c6ddc	153	echo >&2 "Is the &keyring-package; package installed?"
4a242c5b MV	154	exit 1
4a242c5b MV	155	fi
00c6e1a3	156	requires_root
4a242c5b	157
3a341a1d MV	158	# add new keys from the package;
	159
	160	# we do not use add_keys_with_verify_against_master_keyring here,
1171258a	161	# because "update" is run on regular package updates. A
3a341a1d MV	162	# attacker might as well replace the master-archive-keyring file
	163	# in the package and add his own keys. so this check wouldn't
	164	# add any security. we need this check on net-update though
	165	$GPG_CMD --quiet --batch --keyring $ARCHIVE_KEYRING --export \| $GPG --import
4a242c5b	166
364af2ef MV	167	if [ -r "$REMOVED_KEYS" ]; then
	168	# remove no-longer supported/used keys
	169	keys=`$GPG_CMD --keyring $REMOVED_KEYS --with-colons --list-keys \| grep ^pub \| cut -d: -f5`
	170	for key in $keys; do
	171	if $GPG --list-keys --with-colons \| grep ^pub \| cut -d: -f5 \| grep -q $key; then
	172	$GPG --quiet --batch --delete-key --yes ${key}
	173	fi
	174	done
	175	else
	176	echo "Warning: removed keys keyring $REMOVED_KEYS missing or not readable" >&2
	177	fi
4a242c5b MV	178	}
4a242c5b MV	179
04937adc DK	180	remove_key_from_keyring() {
	181	local GPG="$GPG_CMD --keyring $1"
	182	# check if the key is in this keyring: the key id is in the 5 column at the end
	183	if ! $GPG --with-colons --list-keys 2>&1 \| grep -q "^pub:[^:]:[^:]:[^:]*:[0-9A-F]\+$2:"; then
	184	return
	185	fi
	186	if [ ! -w "$1" ]; then
	187	echo >&2 "Key ${2} is in keyring ${1}, but can't be removed as it is read only."
	188	return
	189	fi
1e3f4083	190	# check if it is the only key in the keyring and if so remove the keyring altogether
04937adc DK	191	if [ '1' = "$($GPG --with-colons --list-keys \| grep "^pub:[^:]:[^:]:[^:]*:[0-9A-F]\+:" \| wc -l)" ]; then
	192	mv -f "$1" "${1}~" # behave like gpg
	193	return
	194	fi
	195	# we can't just modify pointed to files as these might be in /usr or something
	196	local REALTARGET
	197	if [ -L "$1" ]; then
	198	REALTARGET="$(readlink -f "$1")"
	199	mv -f "$1" "${1}.dpkg-tmp"
	200	cp -a "$REALTARGET" "$1"
	201	ls "$(dirname $1)"
	202	fi
	203	# delete the key from the keyring
	204	$GPG --batch --delete-key --yes "$2"
	205	if [ -n "$REALTARGET" ]; then
	206	# the real backup is the old link, not the copy we made
	207	mv -f "${1}.dpkg-tmp" "${1}~"
	208	fi
	209	}
	210
	211	remove_key() {
	212	requires_root
	213
	214	# if a --keyring was given, just remove from there
	215	if [ -n "$FORCED_KEYRING" ]; then
	216	remove_key_from_keyring "$FORCED_KEYRING" "$1"
	217	else
	218	# otherwise all known keyrings are up for inspection
	219	local TRUSTEDFILE="/etc/apt/trusted.gpg"
	220	eval $(apt-config shell TRUSTEDFILE Apt::GPGV::TrustedKeyring)
	221	eval $(apt-config shell TRUSTEDFILE Dir::Etc::Trusted/f)
	222	remove_key_from_keyring "$TRUSTEDFILE" "$1"
	223	TRUSTEDPARTS="/etc/apt/trusted.gpg.d"
	224	eval $(apt-config shell TRUSTEDPARTS Dir::Etc::TrustedParts/d)
	225	if [ -d "$TRUSTEDPARTS" ]; then
	226	for trusted in $(run-parts --list "$TRUSTEDPARTS" --regex '^.*\.gpg$'); do
	227	remove_key_from_keyring "$trusted" "$1"
	228	done
	229	fi
	230	fi
	231	echo "OK"
	232	}
	233
7fbe42c0	234
b3d44315	235	usage() {
46e39c8e	236	echo "Usage: apt-key [--keyring file] [command] [arguments]"
b3d44315 MV	237	echo
	238	echo "Manage apt's list of trusted keys"
	239	echo
	240	echo " apt-key add <file> - add the key contained in <file> ('-' for stdin)"
	241	echo " apt-key del <keyid> - remove the key <keyid>"
bf6d5b42 OS	242	echo " apt-key export <keyid> - output the key <keyid>"
bf6d5b42 OS	243	echo " apt-key exportall - output all trusted keys"
4a242c5b	244	echo " apt-key update - update keys using the keyring package"
848ecfa4	245	echo " apt-key net-update - update keys using the network"
b3d44315	246	echo " apt-key list - list keys"
a8cabc8f LB	247	echo " apt-key finger - list fingerprints"
a8cabc8f LB	248	echo " apt-key adv - pass advanced options to gpg (download key)"
b3d44315	249	echo
46e39c8e	250	echo "If no specific keyring file is given the command applies to all keyring files."
b3d44315 MV	251	}
b3d44315 MV	252
3dc55197 DK	253	while [ -n "$1" ]; do
	254	case "$1" in
	255	--keyring)
	256	shift
	257	TRUSTEDFILE="$1"
04937adc	258	FORCED_KEYRING="$1"
3dc55197 DK	259	if [ -r "$TRUSTEDFILE" ] \|\| [ "$2" = 'add' ] \|\| [ "$2" = 'adv' ]; then
	260	GPG="$GPG --keyring $TRUSTEDFILE --primary-keyring $TRUSTEDFILE"
	261	else
	262	echo >&2 "Error: The specified keyring »$TRUSTEDFILE« is missing or not readable"
	263	exit 1
	264	fi
	265	shift
	266	;;
	267	--fakeroot)
	268	requires_root() { true; }
	269	shift
	270	;;
	271	--*)
	272	echo >&2 "Unknown option: $1"
	273	usage
	274	exit 1;;
	275	*)
	276	break;;
	277	esac
	278	done
	279
	280	if [ -z "$TRUSTEDFILE" ]; then
	281	TRUSTEDFILE="/etc/apt/trusted.gpg"
	282	eval $(apt-config shell TRUSTEDFILE Apt::GPGV::TrustedKeyring)
	283	eval $(apt-config shell TRUSTEDFILE Dir::Etc::Trusted/f)
	284	if [ -r "$TRUSTEDFILE" ]; then
	285	GPG="$GPG --keyring $TRUSTEDFILE"
	286	fi
	287	GPG="$GPG --primary-keyring $TRUSTEDFILE"
	288	TRUSTEDPARTS="/etc/apt/trusted.gpg.d"
	289	eval $(apt-config shell TRUSTEDPARTS Dir::Etc::TrustedParts/d)
	290	if [ -d "$TRUSTEDPARTS" ]; then
59f46f3a DK	291	# strip / suffix as gpg will double-slash in that case (#665411)
	292	STRIPPED_TRUSTEDPARTS="${TRUSTEDPARTS%/}"
	293	if [ "${STRIPPED_TRUSTEDPARTS}/" = "$TRUSTEDPARTS" ]; then
	294	TRUSTEDPARTS="$STRIPPED_TRUSTEDPARTS"
	295	fi
	296	for trusted in $(run-parts --list "$TRUSTEDPARTS" --regex '^.*\.gpg$'); do
3dc55197 DK	297	GPG="$GPG --keyring $trusted"
	298	done
	299	fi
46e39c8e	300	fi
46e39c8e	301
b3d44315 MV	302	command="$1"
	303	if [ -z "$command" ]; then
	304	usage
	305	exit 1
	306	fi
	307	shift
	308
	309	if [ "$command" != "help" ] && ! which gpg >/dev/null 2>&1; then
	310	echo >&2 "Warning: gnupg does not seem to be installed."
	311	echo >&2 "Warning: apt-key requires gnupg for most operations."
	312	echo >&2
	313	fi
	314
b3d44315 MV	315	case "$command" in
b3d44315 MV	316	add)
00c6e1a3	317	requires_root
5de34668	318	init_keyring "$TRUSTEDFILE"
b3d44315 MV	319	$GPG --quiet --batch --import "$1"
	320	echo "OK"
	321	;;
	322	del\|rm\|remove)
5de34668	323	init_keyring "$TRUSTEDFILE"
04937adc	324	remove_key "$1"
b3d44315	325	;;
4a242c5b	326	update)
5de34668	327	init_keyring "$TRUSTEDFILE"
4a242c5b MV	328	update
4a242c5b MV	329	;;
848ecfa4	330	net-update)
5de34668	331	init_keyring "$TRUSTEDFILE"
848ecfa4 MV	332	net_update
848ecfa4 MV	333	;;
b3d44315	334	list)
5de34668	335	init_keyring "$TRUSTEDFILE"
b3d44315 MV	336	$GPG --batch --list-keys
	337	;;
	338	finger*)
5de34668	339	init_keyring "$TRUSTEDFILE"
b3d44315 MV	340	$GPG --batch --fingerprint
b3d44315 MV	341	;;
bf6d5b42	342	export)
5de34668	343	init_keyring "$TRUSTEDFILE"
bf6d5b42 OS	344	$GPG --armor --export "$1"
	345	;;
	346	exportall)
5de34668	347	init_keyring "$TRUSTEDFILE"
bf6d5b42 OS	348	$GPG --armor --export
bf6d5b42 OS	349	;;
b3d44315	350	adv*)
5de34668	351	init_keyring "$TRUSTEDFILE"
b3d44315 MV	352	echo "Executing: $GPG $*"
	353	$GPG $*
	354	;;
	355	help)
	356	usage
	357	;;
	358	*)
	359	usage
	360	exit 1
	361	;;
	362	esac