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pacman/scripts/pacman-key.sh.in
Allan McRae 1291c04961 pacman-key: reject armored signatures
pacman expects an unarmored signature.  makepkg forces the generation of
unarmored signatures, and repo-add will reject any armored signature.
For consistency pacman-key should also reject armored signatures.

Signed-off-by: Allan McRae <allan@archlinux.org>
2016-08-30 18:10:40 +10:00

636 lines
19 KiB
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#!/bin/bash
#
# pacman-key - manages pacman's keyring
# Based on apt-key, from Debian
# @configure_input@
#
# Copyright (c) 2010-2016 Pacman Development Team <pacman-dev@archlinux.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# gettext initialization
export TEXTDOMAIN='pacman-scripts'
export TEXTDOMAINDIR='@localedir@'
declare -r myver="@PACKAGE_VERSION@"
# Options
ADD=0
DELETE=0
EDITKEY=0
EXPORT=0
FINGER=0
IMPORT=0
IMPORT_TRUSTDB=0
INIT=0
KEYSERVER=''
LISTKEYS=0
LISTSIGS=0
LSIGNKEY=0
POPULATE=0
RECEIVE=0
REFRESH=0
UPDATEDB=0
USE_COLOR='y'
VERIFY=0
DEFAULT_KEYSERVER='hkp://pool.sks-keyservers.net'
m4_include(library/output_format.sh)
m4_include(library/parseopts.sh)
usage() {
printf "pacman-key (pacman) %s\n" ${myver}
echo
printf -- "$(gettext "Usage: %s [options] operation [targets]")\n" $(basename $0)
echo
printf -- "$(gettext "Manage pacman's list of trusted keys")\n"
echo
printf -- "$(gettext "Operations:")\n"
printf -- "$(gettext " -a, --add Add the specified keys (empty for stdin)")\n"
printf -- "$(gettext " -d, --delete Remove the specified keyids")\n"
printf -- "$(gettext " -e, --export Export the specified or all keyids")\n"
printf -- "$(gettext " -f, --finger List fingerprint for specified or all keyids")\n"
printf -- "$(gettext " -l, --list-keys List the specified or all keys")\n"
printf -- "$(gettext " -r, --recv-keys Fetch the specified keyids")\n"
printf -- "$(gettext " -u, --updatedb Update the trustdb of pacman")\n"
printf -- "$(gettext " -v, --verify Verify the file(s) specified by the signature(s)")\n"
printf -- "$(gettext " --edit-key Present a menu for key management task on keyids")\n"
printf -- "$(gettext " --import Imports pubring.gpg from dir(s)")\n"
printf -- "$(gettext " --import-trustdb Imports ownertrust values from trustdb.gpg in dir(s)")\n"
printf -- "$(gettext " --init Ensure the keyring is properly initialized")\n"
printf -- "$(gettext " --list-sigs List keys and their signatures")\n"
printf -- "$(gettext " --lsign-key Locally sign the specified keyid")\n"
printf -- "$(gettext " --populate Reload the default keys from the (given) keyrings\n\
in '%s'")\n" "@pkgdatadir@/keyrings"
printf -- "$(gettext " --refresh-keys Update specified or all keys from a keyserver")\n"
echo
printf -- "$(gettext "Options:")\n"
printf -- "$(gettext " --config <file> Use an alternate config file (instead of\n\
'%s')")\n" "@sysconfdir@/pacman.conf"
printf -- "$(gettext " --gpgdir <dir> Set an alternate directory for GnuPG (instead\n\
of '%s')")\n" "@sysconfdir@/pacman.d/gnupg"
printf -- "$(gettext " --keyserver <server-url> Specify a keyserver to use if necessary")\n"
echo
printf -- "$(gettext " -h, --help Show this help message and exit")\n"
printf -- "$(gettext " -V, --version Show program version")\n"
}
version() {
printf "pacman-key (pacman) %s\n" "${myver}"
printf -- "$(gettext "\
Copyright (c) 2010-2016 Pacman Development Team <pacman-dev@archlinux.org>.\n\
This is free software; see the source for copying conditions.\n\
There is NO WARRANTY, to the extent permitted by law.\n")"
}
# read the config file "$1" which has key=value pairs, and return the key which
# matches "$2". the equals sign between pairs may be surrounded by any amount
# of whitespace. Optionally, "$3" can be specified which is the default value
# when no key is found.
get_from() {
while IFS='=' read -r key value; do
[[ -z $key || ${key:0:1} = '#' ]] && continue
if [[ ${key%% *} = "$2" && -n ${value##* } ]]; then
echo "${value##* }"
return 0
fi
done < "$1"
if [[ -n "$3" ]]; then
printf '%s\n' "$3"
return 0
fi
return 1
}
key_lookup_from_name() {
local ids
mapfile -t ids < \
<("${GPG_PACMAN[@]}" --search-keys --batch --with-colons "$1" 2>/dev/null |
awk -F: '$1 == "pub" { print $2 }')
# only return success on non-ambiguous lookup
case ${#ids[*]} in
0)
error "$(gettext "Failed to lookup key by name:") %s" "$name"
return 1
;;
1)
printf '%s' "${ids[0]}"
return 0
;;
*)
error "$(gettext "Key name is ambiguous:") %s" "$name"
return 1
;;
esac
}
generate_master_key() {
# Generate the master key, which will be in both pubring and secring
"${GPG_PACMAN[@]}" --gen-key --batch <<EOF
%echo Generating pacman keyring master key...
Key-Type: RSA
Key-Length: 2048
Key-Usage: sign
Name-Real: Pacman Keyring Master Key
Name-Email: pacman@localhost
Expire-Date: 0
%no-protection
%commit
%echo Done
EOF
}
secret_keys_available() {
"${GPG_PACMAN[@]}" -K --with-colons | wc -l
}
# Adds the given gpg.conf option if it is not present in the file.
# Note that if we find it commented out, we won't add the option.
# args: $1 conffile, $2 option-name, $3 (optional) option-value
add_gpg_conf_option() {
local conffile=$1; shift
# looking for the option 'bare', only leading spaces or # chars allowed,
# followed by at least one space and any other text or the end of line.
if ! grep -q "^[[:space:]#]*$1\([[:space:]].*\)*$" "$conffile" &>/dev/null; then
printf '%s\n' "$*" >> "$conffile"
fi
}
check_keyids_exist() {
local ret=0
for key in "$@"; do
# Verify if the key exists in pacman's keyring
if ! "${GPG_PACMAN[@]}" --list-keys "$key" &>/dev/null ; then
error "$(gettext "The key identified by %s could not be found locally.")" "$key"
ret=1
fi
done
if (( ret )); then
exit 1
fi
}
initialize() {
local conffile keyserv
# Check for simple existence rather than for a directory as someone
# may want to use a symlink here
[[ -e ${PACMAN_KEYRING_DIR} ]] || mkdir -p -m 755 "${PACMAN_KEYRING_DIR}"
# keyring files
[[ -f ${PACMAN_KEYRING_DIR}/pubring.gpg ]] || touch ${PACMAN_KEYRING_DIR}/pubring.gpg
[[ -f ${PACMAN_KEYRING_DIR}/secring.gpg ]] || touch ${PACMAN_KEYRING_DIR}/secring.gpg
[[ -f ${PACMAN_KEYRING_DIR}/trustdb.gpg ]] || "${GPG_PACMAN[@]}" --update-trustdb
chmod 644 ${PACMAN_KEYRING_DIR}/{pubring,trustdb}.gpg
chmod 600 ${PACMAN_KEYRING_DIR}/secring.gpg
# gpg.conf
conffile="${PACMAN_KEYRING_DIR}/gpg.conf"
[[ -f $conffile ]] || touch "$conffile"
chmod 644 "$conffile"
add_gpg_conf_option "$conffile" 'no-greeting'
add_gpg_conf_option "$conffile" 'no-permission-warning'
add_gpg_conf_option "$conffile" 'lock-never'
keyserv=${KEYSERVER:-$DEFAULT_KEYSERVER}
add_gpg_conf_option "$conffile" 'keyserver' "$keyserv"
add_gpg_conf_option "$conffile" 'keyserver-options' 'timeout=10'
# set up a private signing key (if none available)
if [[ $(secret_keys_available) -lt 1 ]]; then
generate_master_key
UPDATEDB=1
fi
}
check_keyring() {
if [[ ! -r ${PACMAN_KEYRING_DIR}/pubring.gpg || \
! -r ${PACMAN_KEYRING_DIR}/trustdb.gpg ]]; then
error "$(gettext "You do not have sufficient permissions to read the %s keyring.")" "pacman"
msg "$(gettext "Use '%s' to correct the keyring permissions.")" "pacman-key --init"
exit 1
fi
if (( (EXPORT || FINGER || LIST || VERIFY) && EUID != 0 )); then
if ! grep -q "^[[:space:]]*lock-never[[:space:]]*$" ${PACMAN_KEYRING_DIR}/gpg.conf &>/dev/null; then
error "$(gettext "You do not have sufficient permissions to run this command.")"
msg "$(gettext "Use '%s' to correct the keyring permissions.")" "pacman-key --init"
exit 1
fi
fi
if (( LSIGNKEY )); then
if [[ $(secret_keys_available) -lt 1 ]]; then
error "$(gettext "There is no secret key available to sign with.")"
msg "$(gettext "Use '%s' to generate a default secret key.")" "pacman-key --init"
exit 1
fi
fi
}
populate_keyring() {
local KEYRING_IMPORT_DIR='@pkgdatadir@/keyrings'
local keyring KEYRINGIDS=("$@")
local ret=0
if (( ${#KEYRINGIDS[*]} == 0 )); then
# get list of all available keyrings
shopt -s nullglob
KEYRINGIDS=("$KEYRING_IMPORT_DIR"/*.gpg)
shopt -u nullglob
KEYRINGIDS=("${KEYRINGIDS[@]##*/}")
KEYRINGIDS=("${KEYRINGIDS[@]%.gpg}")
if (( ${#KEYRINGIDS[*]} == 0 )); then
error "$(gettext "No keyring files exist in %s.")" "$KEYRING_IMPORT_DIR"
ret=1
fi
else
# verify listed keyrings exist
for keyring in "${KEYRINGIDS[@]}"; do
if [[ ! -f "$KEYRING_IMPORT_DIR/$keyring.gpg" ]]; then
error "$(gettext "The keyring file %s does not exist.")" "$KEYRING_IMPORT_DIR/$keyring.gpg"
ret=1
fi
done
fi
if (( ret )); then
exit 1
fi
# Variable used for iterating on keyrings
local keys key_id
# Add keys from requested keyrings
for keyring in "${KEYRINGIDS[@]}"; do
msg "$(gettext "Appending keys from %s.gpg...")" "$keyring"
"${GPG_PACMAN[@]}" --quiet --import "${KEYRING_IMPORT_DIR}/${keyring}.gpg"
done
# Read the trusted key IDs to an array. Because this is an ownertrust
# file, we know we have the full 40 hex digit fingerprint values.
# Format of ownertrust dump file:
# 40CHARFINGERPRINTXXXXXXXXXXXXXXXXXXXXXXX:6:
# 40CHARFINGERPRINTXXXXXXXXXXXXXXXXXXXXXXX:5:
local -A trusted_ids
for keyring in "${KEYRINGIDS[@]}"; do
if [[ -s "${KEYRING_IMPORT_DIR}/${keyring}-trusted" ]]; then
while IFS=: read key_id _; do
# skip blank lines, comments; these are valid in this file
[[ -z $key_id || ${key_id:0:1} = \# ]] && continue
# Mark this key to be lsigned
trusted_ids[$key_id]=$keyring
done < "${KEYRING_IMPORT_DIR}/${keyring}-trusted"
fi
done
if (( ${#trusted_ids[@]} > 0 )); then
msg "$(gettext "Locally signing trusted keys in keyring...")"
lsign_keys "${!trusted_ids[@]}"
msg "$(gettext "Importing owner trust values...")"
for keyring in "${KEYRINGIDS[@]}"; do
if [[ -s "${KEYRING_IMPORT_DIR}/${keyring}-trusted" ]]; then
"${GPG_PACMAN[@]}" --import-ownertrust "${KEYRING_IMPORT_DIR}/${keyring}-trusted"
fi
done
fi
local -A revoked_ids
for keyring in "${KEYRINGIDS[@]}"; do
if [[ -s $KEYRING_IMPORT_DIR/$keyring-revoked ]]; then
while read -r key_id; do
revoked_ids["$key_id"]=1
done <"$KEYRING_IMPORT_DIR/$keyring-revoked"
fi
done
if (( ${#revoked_ids[@]} > 0 )); then
msg "$(gettext "Disabling revoked keys in keyring...")"
for key_id in "${!revoked_ids[@]}"; do
msg2 "$(gettext "Disabling key %s...")" "${key_id}"
printf 'disable\nquit\n' | LANG=C "${GPG_PACMAN[@]}" --command-fd 0 --quiet --batch --edit-key "${key_id}" 2>/dev/null
done
fi
}
add_keys() {
if ! "${GPG_PACMAN[@]}" --quiet --batch --import "$@" ; then
error "$(gettext "A specified keyfile could not be added to the keyring.")"
exit 1
fi
}
delete_keys() {
check_keyids_exist "$@"
if ! "${GPG_PACMAN[@]}" --quiet --batch --delete-key --yes "$@" ; then
error "$(gettext "A specified key could not be removed from the keyring.")"
exit 1
fi
}
edit_keys() {
check_keyids_exist "$@"
local ret=0
for key in "$@"; do
if ! "${GPG_PACMAN[@]}" --edit-key "$key" ; then
error "$(gettext "The key identified by %s could not be edited.")" "$key"
ret=1
fi
done
if (( ret )); then
exit 1
fi
}
export_keys() {
check_keyids_exist "$@"
if ! "${GPG_PACMAN[@]}" --armor --export "$@" ; then
error "$(gettext "A specified key could not be exported from the keyring.")"
exit 1
fi
}
finger_keys() {
check_keyids_exist
if ! "${GPG_PACMAN[@]}" --batch --fingerprint "$@" ; then
error "$(gettext "The fingerprint of a specified key could not be determined.")"
exit 1
fi
}
import_trustdb() {
local importdir
local ret=0
for importdir in "$@"; do
if [[ -f "${importdir}/trustdb.gpg" ]]; then
gpg --homedir "${importdir}" --export-ownertrust | \
"${GPG_PACMAN[@]}" --import-ownertrust -
if (( PIPESTATUS )); then
error "$(gettext "%s could not be imported.")" "${importdir}/trustdb.gpg"
ret=1
fi
else
error "$(gettext "File %s does not exist and could not be imported.")" "${importdir}/trustdb.gpg"
ret=1
fi
done
if (( ret )); then
exit 1
fi
}
import() {
local importdir
local ret=0
for importdir in "$@"; do
if [[ -f "${importdir}/pubring.gpg" ]]; then
if ! "${GPG_PACMAN[@]}" --quiet --batch --import "${importdir}/pubring.gpg" ; then
error "$(gettext "%s could not be imported.")" "${importdir}/pubring.gpg"
ret=1
fi
else
error "$(gettext "File %s does not exist and could not be imported.")" "${importdir}/pubring.gpg"
ret=1
fi
done
if (( ret )); then
exit 1
fi
}
list_keys() {
check_keyids_exist
if ! "${GPG_PACMAN[@]}" --batch --list-keys "$@" ; then
error "$(gettext "A specified key could not be listed.")"
exit 1
fi
}
list_sigs() {
check_keyids_exist
if ! "${GPG_PACMAN[@]}" --batch --list-sigs "$@" ; then
error "$(gettext "A specified signature could not be listed.")"
exit 1
fi
}
lsign_keys() {
check_keyids_exist
local ret=0
for key_id in "$@"; do
msg2 "$(gettext "Locally signing key %s...")" "${key_id}"
# we cannot use --yes here as gpg would still ask for confirmation if a key has more than one uid
printf 'y\ny\n' | LANG=C "${GPG_PACMAN[@]}" --command-fd 0 --quiet --batch --lsign-key "${key_id}" 2>/dev/null
if (( PIPESTATUS[1] )); then
error "$(gettext "%s could not be locally signed.")" "${key_id}"
ret=1
fi
done
if (( ret )); then
exit 1
fi
}
receive_keys() {
local name id keyids
# if the key is not a hex ID, do a lookup
for name; do
if [[ $name = ?(0x)+([0-9a-fA-F]) ]]; then
keyids+=("$name")
else
if id=$(key_lookup_from_name "$name"); then
keyids+=("$id")
fi
fi
done
(( ${#keyids[*]} > 0 )) || exit 1
if ! "${GPG_PACMAN[@]}" --recv-keys "${keyids[@]}" ; then
error "$(gettext "Remote key not fetched correctly from keyserver.")"
exit 1
fi
}
refresh_keys() {
check_keyids_exist "$@"
if ! "${GPG_PACMAN[@]}" --refresh-keys "$@" ; then
error "$(gettext "A specified local key could not be updated from a keyserver.")"
exit 1
fi
}
verify_sig() {
local ret=0
for sig; do
msg "Checking %s..." "$sig"
if grep -q 'BEGIN PGP SIGNATURE' "$sig"; then
error "$(gettext "Cannot use armored signatures for packages: %s")" "$sig"
return 1
fi
if ! "${GPG_PACMAN[@]}" --status-fd 1 --verify "$sig" | grep -qE '^\[GNUPG:\] TRUST_(FULLY|ULTIMATE).*$'; then
error "$(gettext "The signature identified by %s could not be verified.")" "$sig"
ret=1
fi
done
exit $ret
}
updatedb() {
msg "$(gettext "Updating trust database...")"
if ! "${GPG_PACMAN[@]}" --batch --check-trustdb ; then
error "$(gettext "Trust database could not be updated.")"
exit 1
fi
}
# PROGRAM START
if ! type gettext &>/dev/null; then
gettext() {
echo "$@"
}
fi
OPT_SHORT="adefhlruvV"
OPT_LONG=('add' 'config:' 'delete' 'edit-key' 'export' 'finger' 'gpgdir:'
'help' 'import' 'import-trustdb' 'init' 'keyserver:' 'list-keys' 'list-sigs'
'lsign-key' 'nocolor' 'populate' 'recv-keys' 'refresh-keys' 'updatedb'
'verify' 'version')
if ! parseopts "$OPT_SHORT" "${OPT_LONG[@]}" -- "$@"; then
exit 1 # E_INVALID_OPTION;
fi
set -- "${OPTRET[@]}"
unset OPT_SHORT OPT_LONG OPTRET
if [[ $1 == "--" ]]; then
usage;
exit 0;
fi
while (( $# )); do
case $1 in
-a|--add) ADD=1 UPDATEDB=1 ;;
--config) shift; CONFIG=$1 ;;
-d|--delete) DELETE=1 UPDATEDB=1 ;;
--edit-key) EDITKEY=1 UPDATEDB=1 ;;
-e|--export) EXPORT=1 ;;
-f|--finger) FINGER=1 ;;
--gpgdir) shift; PACMAN_KEYRING_DIR=$1 ;;
--import) IMPORT=1 UPDATEDB=1 ;;
--import-trustdb) IMPORT_TRUSTDB=1 UPDATEDB=1 ;;
--init) INIT=1 ;;
--keyserver) shift; KEYSERVER=$1 ;;
-l|--list-keys) LISTKEYS=1 ;;
--list-sigs) LISTSIGS=1 ;;
--lsign-key) LSIGNKEY=1 UPDATEDB=1 ;;
--nocolor) USE_COLOR='n';;
--populate) POPULATE=1 UPDATEDB=1 ;;
-r|--recv-keys) RECEIVE=1 UPDATEDB=1 ;;
--refresh-keys) REFRESH=1 ;;
-u|--updatedb) UPDATEDB=1 ;;
-v|--verify) VERIFY=1 ;;
-h|--help) usage; exit 0 ;;
-V|--version) version; exit 0 ;;
--) shift; break 2 ;;
esac
shift
done
m4_include(library/term_colors.sh)
if ! type -p gpg >/dev/null; then
error "$(gettext "Cannot find the %s binary required for all %s operations.")" "gpg" "pacman-key"
exit 1
fi
if (( (ADD || DELETE || EDITKEY || IMPORT || IMPORT_TRUSTDB || INIT || LSIGNKEY || POPULATE || RECEIVE || REFRESH || UPDATEDB) && EUID != 0 )); then
error "$(gettext "%s needs to be run as root for this operation.")" "pacman-key"
exit 1
fi
CONFIG=${CONFIG:-@sysconfdir@/pacman.conf}
if [[ ! -r "${CONFIG}" ]]; then
error "$(gettext "%s configuration file '%s' not found.")" "pacman" "$CONFIG"
exit 1
fi
# if PACMAN_KEYRING_DIR isn't assigned, try to get it from the config
# file, falling back on a hard default
PACMAN_KEYRING_DIR=${PACMAN_KEYRING_DIR:-$(get_from "$CONFIG" "GPGDir" "@sysconfdir@/pacman.d/gnupg")}
GPG_PACMAN=(gpg --homedir "${PACMAN_KEYRING_DIR}" --no-permission-warning)
if [[ -n ${KEYSERVER} ]]; then
GPG_PACMAN+=(--keyserver "${KEYSERVER}")
fi
# check only a single operation has been given
# don't include UPDATEDB in here as other opts can induce it
numopt=$(( ADD + DELETE + EDITKEY + EXPORT + FINGER + IMPORT + IMPORT_TRUSTDB +
INIT + LISTKEYS + LISTSIGS + LSIGNKEY + POPULATE + RECEIVE + REFRESH + VERIFY ))
case $numopt in
0)
if (( ! UPDATEDB )); then
error "$(gettext "no operation specified (use -h for help)")"
exit 1
fi
;;
[!1])
error "$(gettext "Multiple operations specified.")"
msg "$(gettext "Please run %s with each operation separately.")" "pacman-key"
exit 1
;;
esac
# check for targets where needed
if (( (ADD || DELETE || EDIT || IMPORT || IMPORT_TRUSTDB ||
LSIGNKEY || RECEIVE || VERIFY) && $# == 0 )); then
error "$(gettext "No targets specified")"
exit 1
fi
(( ! INIT )) && check_keyring
(( ADD )) && add_keys "$@"
(( DELETE )) && delete_keys "$@"
(( EDITKEY )) && edit_keys "$@"
(( EXPORT )) && export_keys "$@"
(( FINGER )) && finger_keys "$@"
(( IMPORT )) && import "$@"
(( IMPORT_TRUSTDB)) && import_trustdb "$@"
(( INIT )) && initialize
(( LISTKEYS )) && list_keys "$@"
(( LISTSIGS )) && list_sigs "$@"
(( LSIGNKEY )) && lsign_keys "$@"
(( POPULATE )) && populate_keyring "$@"
(( RECEIVE )) && receive_keys "$@"
(( REFRESH )) && refresh_keys "$@"
(( VERIFY )) && verify_sig "$@"
(( UPDATEDB )) && updatedb
exit 0
# vim: set noet: