Send patches - preferably formatted by git format-patch - to patches at archlinux32 dot org.
summaryrefslogtreecommitdiff
path: root/scripts/libmakepkg/integrity/verify_signature.sh.in
blob: 6df6272725284dabf202fa5b049c8934b13355a6 (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
#!/bin/bash
#
#   verify_signature.sh - functions for checking PGP signatures
#
#   Copyright (c) 2011-2016 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/>.
#

[[ -n "$LIBMAKEPKG_INTEGRITY_VERIFY_SIGNATURE_SH" ]] && return
LIBMAKEPKG_INTEGRITY_VERIFY_SIGNATURE_SH=1

LIBRARY=${LIBRARY:-'@libmakepkgdir@'}

source "$LIBRARY/util/message.sh"
source "$LIBRARY/util/pkgbuild.sh"

check_pgpsigs() {
	(( SKIPPGPCHECK )) && return 0
	! source_has_signatures && return 0

	msg "$(gettext "Verifying source file signatures with %s...")" "gpg"

	local file ext decompress found pubkey success status fingerprint trusted
	local warning=0
	local errors=0
	local statusfile=$(mktemp)
	local all_sources

	case $1 in
		all)
			get_all_sources 'all_sources'
			;;
		*)
			get_all_sources_for_arch 'all_sources'
			;;
	esac
	for file in "${all_sources[@]}"; do
		file="$(get_filename "$file")"
		if [[ $file != *.@(sig?(n)|asc) ]]; then
			continue
		fi

		printf "    %s ... " "${file%.*}" >&2

		if ! file="$(get_filepath "$file")"; then
			printf '%s\n' "$(gettext "SIGNATURE NOT FOUND")" >&2
			errors=1
			continue
		fi

		found=0
		for ext in "" gz bz2 xz lrz lzo Z; do
			if sourcefile="$(get_filepath "${file%.*}${ext:+.$ext}")"; then
				found=1
				break;
			fi
		done
		if (( ! found )); then
			printf '%s\n' "$(gettext "SOURCE FILE NOT FOUND")" >&2
			errors=1
			continue
		fi

		case "$ext" in
			gz)  decompress="gzip -c -d -f" ;;
			bz2) decompress="bzip2 -c -d -f" ;;
			xz)  decompress="xz -c -d" ;;
			lrz) decompress="lrzip -q -d" ;;
			lzo) decompress="lzop -c -d -q" ;;
			Z)   decompress="uncompress -c -f" ;;
			"")  decompress="cat" ;;
		esac

		$decompress < "$sourcefile" | gpg --quiet --batch --status-file "$statusfile" --verify "$file" - 2> /dev/null
		# these variables are assigned values in parse_gpg_statusfile
		success=0
		status=
		pubkey=
		fingerprint=
		trusted=
		parse_gpg_statusfile "$statusfile"
		if (( ! $success )); then
			printf '%s' "$(gettext "FAILED")" >&2
			case "$status" in
				"missingkey")
					printf ' (%s)' "$(gettext "unknown public key") $pubkey" >&2
					;;
				"revokedkey")
					printf " ($(gettext "public key %s has been revoked"))" "$pubkey" >&2
					;;
				"bad")
					printf ' (%s)' "$(gettext "bad signature from public key") $pubkey" >&2
					;;
				"error")
					printf ' (%s)' "$(gettext "error during signature verification")" >&2
					;;
			esac
			errors=1
		else
			if (( ${#validpgpkeys[@]} == 0 && !trusted )); then
				printf "%s ($(gettext "the public key %s is not trusted"))" $(gettext "FAILED") "$fingerprint" >&2
				errors=1
			elif (( ${#validpgpkeys[@]} > 0 )) && ! in_array "$fingerprint" "${validpgpkeys[@]}"; then
				printf "%s (%s %s)" "$(gettext "FAILED")" "$(gettext "invalid public key")" "$fingerprint"
				errors=1
			else
				printf '%s' "$(gettext "Passed")" >&2
				case "$status" in
					"expired")
						printf ' (%s)' "$(gettext "WARNING:") $(gettext "the signature has expired.")" >&2
						warnings=1
						;;
					"expiredkey")
						printf ' (%s)' "$(gettext "WARNING:") $(gettext "the key has expired.")" >&2
						warnings=1
						;;
				esac
			fi
		fi
		printf '\n' >&2
	done

	rm -f "$statusfile"

	if (( errors )); then
		error "$(gettext "One or more PGP signatures could not be verified!")"
		exit 1
	fi

	if (( warnings )); then
		warning "$(gettext "Warnings have occurred while verifying the signatures.")"
		plain "$(gettext "Please make sure you really trust them.")"
	fi
}

parse_gpg_statusfile() {
	local type arg1 arg6 arg10

	while read -r _ type arg1 _ _ _ _ arg6 _ _ _ arg10 _; do
		case "$type" in
			GOODSIG)
				pubkey=$arg1
				success=1
				status="good"
				;;
			EXPSIG)
				pubkey=$arg1
				success=1
				status="expired"
				;;
			EXPKEYSIG)
				pubkey=$arg1
				success=1
				status="expiredkey"
				;;
			REVKEYSIG)
				pubkey=$arg1
				success=0
				status="revokedkey"
				;;
			BADSIG)
				pubkey=$arg1
				success=0
				status="bad"
				;;
			ERRSIG)
				pubkey=$arg1
				success=0
				if [[ $arg6 == 9 ]]; then
					status="missingkey"
				else
					status="error"
				fi
				;;
			VALIDSIG)
				if [[ $arg10 ]]; then
					# If the file was signed with a subkey, arg10 contains
					# the fingerprint of the primary key
					fingerprint=$arg10
				else
					fingerprint=$arg1
				fi
				;;
			TRUST_UNDEFINED|TRUST_NEVER)
				trusted=0
				;;
			TRUST_MARGINAL|TRUST_FULLY|TRUST_ULTIMATE)
				trusted=1
				;;
		esac
	done < "$1"
}

source_has_signatures() {
	local file all_sources

	get_all_sources_for_arch 'all_sources'
	for file in "${all_sources[@]}"; do
		if [[ ${file%%::*} = *.@(sig?(n)|asc) ]]; then
			return 0
		fi
	done
	return 1
}