summaryrefslogtreecommitdiff
path: root/scripts/pacman-key.sh.in
blob: 80f8bc7c9e7fbed20439b522a7fbfe91524e53a2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
#!@BASH_SHELL@ -e
#
#   pacman-key - manages pacman's keyring
#                Based on apt-key, from Debian
#   @configure_input@
#
#   Copyright (c) 2010-2011 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'
export TEXTDOMAINDIR='@localedir@'

myver="@PACKAGE_VERSION@"

msg() {
	local mesg=$1; shift
	printf "==> ${mesg}\n" "$@" >&1
}

msg2() {
	(( QUIET )) && return
	local mesg=$1; shift
	printf "  -> ${mesg}\n" "$@" >&1
}

warning() {
	local mesg=$1; shift
	printf "==> $(gettext "WARNING:") ${mesg}\n" "$@" >&2
}

error() {
	local mesg=$1; shift
	printf "==> $(gettext "ERROR:") ${mesg}\n" "$@" >&2
}

usage() {
	printf "pacman-key (pacman) %s\n" ${myver}
	echo
	printf "$(gettext "Usage: %s [options] <command> [arguments]")\n" $(basename $0)
	echo
	echo "$(gettext "Manage pacman's list of trusted keys")"
	echo
	echo "$(gettext "Options must be placed before commands. The available options are:")"
	printf "$(gettext "  --config <file>  Use an alternate config file (instead of '%s')")\n" "$CONFIG"
	printf "$(gettext "  --gpgdir         Set an alternate directory for gnupg (instead of '%s')")\n" "$PACMAN_KEYRING_DIR"
	echo
	echo "$(gettext "The available commands are:")"
	echo "$(gettext "  -a, --add [<file(s)>]     Add the specified keys (empty for stdin)")"
	echo "$(gettext "  -d, --del <keyid(s)>      Remove the specified keyids")"
	echo "$(gettext "  -e, --export <keyid(s)>   Export the specified keyids")"
	echo "$(gettext "  -f, --finger [<keyid(s)>] List fingerprint for specified or all keyids")"
	echo "$(gettext "  -h, --help                Show this help message and exit")"
	echo "$(gettext "  -l, --list                List keys")"
	echo "$(gettext "  -r, --receive <keyserver> <keyid(s)> Fetch the specified keyids")"
	echo "$(gettext "  -t, --trust <keyid(s)>    Set the trust level of the given keyids")"
	echo "$(gettext "  -u, --updatedb            Update the trustdb of pacman")"
	echo "$(gettext "  -V, --version             Show program version")"
	echo "$(gettext "  --adv <params>            Use pacman's keyring with advanced gpg commands")"
	printf "$(gettext "  --reload                  Reload the default keys")"
	echo
}

version() {
	printf "pacman-key (pacman) %s\n" "${myver}"
	printf "$(gettext "\
Copyright (c) 2010-2011 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 provided file and search for values matching the given key
# The contents of the file are expected to be in this format: key = value
# 'key', 'equal sign' and 'value' can be surrounded by random whitespace
# Usage: get_from "$file" "$key" # returns the value for the first matching key in the file
get_from() {
    while read key _ value; do
        if [[ $key = $2 ]]; then
            echo "$value"
            break
        fi
    done < "$1"
}

reload_keyring() {
	local PACMAN_SHARE_DIR='@prefix@/share/pacman'
	local GPG_NOKEYRING="gpg --batch --quiet --ignore-time-conflict --no-options --no-default-keyring --homedir ${PACMAN_KEYRING_DIR}"

	# Variable used for iterating on keyrings
	local key
	local key_id

	# Keyring with keys to be added to the keyring
	local ADDED_KEYS="${PACMAN_SHARE_DIR}/addedkeys.gpg"

	# Keyring with keys that were deprecated and will eventually be deleted
	local DEPRECATED_KEYS="${PACMAN_SHARE_DIR}/deprecatedkeys.gpg"

	# List of keys removed from the keyring. This file is not a keyring, unlike the others.
	# It is a textual list of values that gpg recogniezes as identifiers for keys.
	local REMOVED_KEYS="${PACMAN_SHARE_DIR}/removedkeys"

	# Verify signatures of related files, if they exist
	if [[ -r "${ADDED_KEYS}" ]]; then
		msg "$(gettext "Verifying official keys file signature...")"
		if ! ${GPG_PACMAN} --quiet --batch --verify "${ADDED_KEYS}.sig" 1>/dev/null; then
			error "$(gettext "The signature of file %s is not valid.")" "${ADDED_KEYS}"
			exit 1
		fi
	fi

	if [[ -r "${DEPRECATED_KEYS}" ]]; then
		msg "$(gettext "Verifying deprecated keys file signature...")"
		if ! ${GPG_PACMAN} --quiet --batch --verify "${DEPRECATED_KEYS}.sig" 1>/dev/null; then
			error "$(gettext "The signature of file %s is not valid.")" "${DEPRECATED_KEYS}"
			exit 1
		fi
	fi

	if [[ -r "${REMOVED_KEYS}" ]]; then
		msg "$(gettext "Verifying deleted keys file signature...")"
		if ! ${GPG_PACMAN} --quiet --batch --verify "${REMOVED_KEYS}.sig"; then
			error "$(gettext "The signature of file %s is not valid.")" "${REMOVED_KEYS}"
			exit 1
		fi
	fi

	# Read the key ids to an array. The conversion from whatever is inside the file
	# to key ids is important, because key ids are the only guarantee of identification
	# for the keys.
	local -A removed_ids
	if [[ -r "${REMOVED_KEYS}" ]]; then
		while read key; do
			local key_values name
			key_values=$(${GPG_PACMAN} --quiet --with-colons --list-key "${key}" | grep ^pub | cut -d: -f5,10 --output-delimiter=' ')
			if [[ -n $key_values ]]; then
				# The first word is the key_id
				key_id=${key_values%% *}
				# the rest if the name of the owner
				name=${key_values#* }
				if [[ -n ${key_id} ]]; then
					# Mark this key to be deleted
					removed_ids[$key_id]="$name"
				fi
			fi
		done < "${REMOVED_KEYS}"
	fi

	# List of keys that must be kept installed, even if in the list of keys to be removed
	local HOLD_KEYS=$(get_from "$CONFIG" "HoldKeys")

	# Remove the keys that must be kept from the set of keys that should be removed
	if [[ -n ${HOLD_KEYS} ]]; then
		for key in ${HOLD_KEYS}; do
			key_id=$(${GPG_PACMAN} --quiet --with-colons --list-key "${key}" | grep ^pub | cut -d: -f5)
			if [[ -n "${removed_ids[$key_id]}" ]]; then
				unset removed_ids[$key_id]
			fi
		done
	fi

	# Add keys from the current set of keys from pacman-keyring package. The web of trust will
	# be updated automatically.
	if [[ -r "${ADDED_KEYS}" ]]; then
		msg "$(gettext "Appending official keys...")"
		local add_keys=$(${GPG_NOKEYRING} --keyring "${ADDED_KEYS}" --with-colons --list-keys | grep ^pub | cut -d: -f5)
		for key_id in ${add_keys}; do
			# There is no point in adding a key that will be deleted right after
			if [[ -z "${removed_ids[$key_id]}" ]]; then
				${GPG_NOKEYRING} --keyring "${ADDED_KEYS}" --export "${key_id}" | ${GPG_PACMAN} --import
			fi
		done
	fi

	if [[ -r "${DEPRECATED_KEYS}" ]]; then
		msg "$(gettext "Appending deprecated keys...")"
		local add_keys=$(${GPG_NOKEYRING} --keyring "${DEPRECATED_KEYS}" --with-colons --list-keys | grep ^pub | cut -d: -f5)
		for key_id in ${add_keys}; do
			# There is no point in adding a key that will be deleted right after
			if [[ -z "${removed_ids[$key_id]}" ]]; then
				${GPG_NOKEYRING} --keyring "${DEPRECATED_KEYS}" --export "${key_id}" | ${GPG_PACMAN} --import
			fi
		done
	fi

	# Remove the keys not marked to keep
	if (( ${#removed_ids[@]} > 0 )); then
		msg "$(gettext "Removing deleted keys from keyring...")"
		for key_id in "${!removed_ids[@]}"; do
			echo "  removing key $key_id - ${removed_ids[$key_id]}"
			${GPG_PACMAN} --quiet --batch --yes --delete-key "${key_id}"
		done
	fi

	# Update trustdb, just to be sure
	msg "$(gettext "Updating trust database...")"
	${GPG_PACMAN} --batch --check-trustdb
}

# PROGRAM START
if ! type gettext &>/dev/null; then
	gettext() {
		echo "$@"
	}
fi

if [[ $1 != "--version" && $1 != "-V" && $1 != "--help" && $1 != "-h" && $1 != "" ]]; then
	if type -p gpg >/dev/null 2>&1 = 1; then
		error "$(gettext "gnupg does not seem to be installed.")"
		msg2 "$(gettext "pacman-key requires gnupg for most operations.")"
		exit 1
	elif (( EUID != 0 )); then
		error "$(gettext "pacman-key needs to be run as root.")"
		exit 1
	fi
fi

# Parse global options
CONFIG="@sysconfdir@/pacman.conf"
PACMAN_KEYRING_DIR="@sysconfdir@/pacman.d/gnupg"
while [[ $1 =~ ^--(config|gpgdir)$ ]]; do
	case "$1" in
		--config) shift; CONFIG="$1" ;;
		--gpgdir) shift; PACMAN_KEYRING_DIR="$1" ;;
	esac
	shift
done

if [[ ! -r "${CONFIG}" ]]; then
	error "$(gettext "%s not found.")" "$CONFIG"
	exit 1
fi

# Read GPGDIR from $CONFIG.
if [[ GPGDIR=$(get_from "$CONFIG" "GPGDir") == 0 ]]; then
	PACMAN_KEYRING_DIR="${GPGDIR}"
fi
GPG_PACMAN="gpg --homedir ${PACMAN_KEYRING_DIR} --no-permission-warning"

# Try to create $PACMAN_KEYRING_DIR if non-existent
# 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}"

# Parse and execute command
command="$1"
if [[ -z "${command}" ]]; then
	usage
	exit 1
fi
shift

case "${command}" in
	-a|--add)
		# If there is no extra parameter, gpg will read stdin
		${GPG_PACMAN} --quiet --batch --import "$@"
		;;
	-d|--del)
		if (( $# == 0 )); then
			error "$(gettext "You need to specify at least one key identifier")"
			exit 1
		fi
		${GPG_PACMAN} --quiet --batch --delete-key --yes "$@"
		;;
	-u|--updatedb)
		${GPG_PACMAN} --batch --check-trustdb
		;;
	--reload)
		reload_keyring
		;;
	-l|--list)
		${GPG_PACMAN} --batch --list-sigs "$@"
		;;
	-f|--finger)
		${GPG_PACMAN} --batch --fingerprint "$@"
		;;
	-e|--export)
		${GPG_PACMAN} --armor --export "$@"
		;;
	-r|--receive)
		if (( $# < 2 )); then
			error "$(gettext "You need to specify the keyserver and at least one key identifier")"
			exit 1
		fi
		keyserver="$1"
		shift
		${GPG_PACMAN} --keyserver "${keyserver}" --recv-keys "$@"
		;;
	-t|--trust)
		if (( $# == 0 )); then
			error "$(gettext "You need to specify at least one key identifier")"
			exit 1
		fi
		while (( $# > 0 )); do
			# Verify if the key exists in pacman's keyring
			if ${GPG_PACMAN} --list-keys "$1" > /dev/null 2>&1; then
				${GPG_PACMAN} --edit-key "$1"
			else
				error "$(gettext "The key identified by %s doesn't exist")" "$1"
				exit 1
			fi
			shift
		done
		;;
	--adv)
		msg "$(gettext "Executing: %s ")$*" "${GPG_PACMAN}"
		${GPG_PACMAN} "$@" || ret=$?
		exit $ret
		;;
	-h|--help)
		usage; exit 0 ;;
	-V|--version)
		version; exit 0 ;;
	*)
		error "$(gettext "Unknown command:") $command"
		usage; exit 1 ;;
esac