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CommitLineData
b3d44315
MV
1#!/bin/sh
2
3set -e
dac074b0 4unset GREP_OPTIONS
fecfbf2e 5export IFS="$(printf "\n\b")"
b3d44315 6
5b2c6ddc 7MASTER_KEYRING='&keyring-master-filename;'
bc8f83a5 8eval "$(apt-config shell MASTER_KEYRING APT::Key::MasterKeyring)"
5b2c6ddc 9ARCHIVE_KEYRING='&keyring-filename;'
bc8f83a5 10eval "$(apt-config shell ARCHIVE_KEYRING APT::Key::ArchiveKeyring)"
5b2c6ddc 11REMOVED_KEYS='&keyring-removed-filename;'
bc8f83a5 12eval "$(apt-config shell REMOVED_KEYS APT::Key::RemovedKeys)"
5b2c6ddc 13ARCHIVE_KEYRING_URI='&keyring-uri;'
bc8f83a5 14eval "$(apt-config shell ARCHIVE_KEYRING_URI APT::Key::ArchiveKeyringURI)"
4a242c5b 15
3d0def05
DK
16aptkey_echo() { echo "$@"; }
17
00c6e1a3
MV
18requires_root() {
19 if [ "$(id -u)" -ne 0 ]; then
84b286f6 20 echo >&2 "ERROR: This command can only be used by root."
00c6e1a3
MV
21 exit 1
22 fi
23}
24
e23ee4c2 25command_available() {
ee385a36 26 if [ -x "$1" ]; then return 0; fi
e23ee4c2
DK
27 # command -v "$1" >/dev/null 2>&1 # not required by policy, see #747320
28 # which "$1" >/dev/null 2>&1 # is in debianutils (essential) but not on non-debian systems
29 local OLDIFS="$IFS"
30 IFS=:
31 for p in $PATH; do
32 if [ -x "${p}/${1}" ]; then
33 IFS="$OLDIFS"
34 return 0
35 fi
36 done
37 IFS="$OLDIFS"
38 return 1
39}
40
bc8f83a5
DK
41escape_shell() {
42 echo "$@" | sed -e "s#'#'\"'\"'#g"
43}
44
ba72845c 45get_fingerprints_of_keyring() {
fecfbf2e 46 aptkey_execute "$GPG_SH" --keyring "$1" --with-colons --fingerprint | while read publine; do
ba72845c
DK
47 # search for a public key
48 if [ "${publine%%:*}" != 'pub' ]; then continue; fi
49 # search for the associated fingerprint (should be the very next line)
50 while read fprline; do
51 if [ "${fprline%%:*}" = 'sub' ]; then break; # should never happen
52 elif [ "${fprline%%:*}" != 'fpr' ]; then continue; fi
53 echo "$fprline" | cut -d':' -f 10
54 done
25f27319
DK
55 # order in the keyring shouldn't be important
56 done | sort
ba72845c
DK
57}
58
7fbe42c0 59add_keys_with_verify_against_master_keyring() {
bc8f83a5
DK
60 ADD_KEYRING="$1"
61 MASTER="$2"
f87338d2 62
8c56b1e0 63 if [ ! -f "$ADD_KEYRING" ]; then
84b286f6 64 echo >&2 "ERROR: '$ADD_KEYRING' not found"
8c56b1e0 65 return
84b286f6 66 fi
8c56b1e0 67 if [ ! -f "$MASTER" ]; then
84b286f6 68 echo >&2 "ERROR: '$MASTER' not found"
8c56b1e0
MV
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
75 # from a key in the $distro-master-keyring
ba72845c 76 add_keys="$(get_fingerprints_of_keyring "$ADD_KEYRING")"
bc8f83a5
DK
77 all_add_keys="$(aptkey_execute "$GPG_SH" --keyring "$ADD_KEYRING" --with-colons --list-keys | grep ^[ps]ub | cut -d: -f5)"
78 master_keys="$(aptkey_execute "$GPG_SH" --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
0dae96a2 89
8c56b1e0 90 for add_key in $add_keys; do
f87338d2 91 # export the add keyring one-by-one
0dae96a2 92 local TMP_KEYRING="${GPGHOMEDIR}/tmp-keyring.gpg"
fecfbf2e
DK
93 aptkey_execute "$GPG_SH" --batch --yes --keyring "$ADD_KEYRING" --output "$TMP_KEYRING" --export "$add_key"
94 if ! aptkey_execute "$GPG_SH" --batch --yes --keyring "$TMP_KEYRING" --import "$MASTER" > "${GPGHOMEDIR}/gpgoutput.log" 2>&1; then
c1642be5 95 cat >&2 "${GPGHOMEDIR}/gpgoutput.log"
0dae96a2
DK
96 false
97 fi
98 # check if signed with the master key and only add in this case
99 ADDED=0
8c56b1e0 100 for master_key in $master_keys; do
fecfbf2e
DK
101 if aptkey_execute "$GPG_SH" --keyring "$TMP_KEYRING" --check-sigs --with-colons "$add_key" \
102 | grep '^sig:!:' | cut -d: -f5 | grep -q "$master_key"; then
103 aptkey_execute "$GPG_SH" --batch --yes --keyring "$ADD_KEYRING" --export "$add_key" \
104 | aptkey_execute "$GPG" --batch --yes --import
c9bb37c7 105 ADDED=1
8c56b1e0 106 fi
7fbe42c0 107 done
c9bb37c7
MV
108 if [ $ADDED = 0 ]; then
109 echo >&2 "Key '$add_key' not added. It is not signed with a master key"
110 fi
0dae96a2 111 rm -f "${TMP_KEYRING}"
8c56b1e0 112 done
7fbe42c0 113}
4a242c5b 114
848ecfa4
MV
115# update the current archive signing keyring from a network URI
116# the archive-keyring keys needs to be signed with the master key
117# (otherwise it does not make sense from a security POV)
118net_update() {
bc8f83a5
DK
119 local APT_DIR='/'
120 eval $(apt-config shell APT_DIR Dir)
121
f87338d2 122 # Disabled for now as code is insecure (LP: #1013639 (and 857472, 1013128))
5acf154d
MV
123 APT_KEY_NET_UPDATE_ENABLED=""
124 eval $(apt-config shell APT_KEY_NET_UPDATE_ENABLED APT::Key::Net-Update-Enabled)
125 if [ -z "$APT_KEY_NET_UPDATE_ENABLED" ]; then
126 exit 1
127 fi
f87338d2 128
848ecfa4 129 if [ -z "$ARCHIVE_KEYRING_URI" ]; then
00c6e1a3 130 echo >&2 "ERROR: Your distribution is not supported in net-update as no uri for the archive-keyring is set"
46e39c8e
MV
131 exit 1
132 fi
133 # in theory we would need to depend on wget for this, but this feature
134 # isn't useable in debian anyway as we have no keyring uri nor a master key
e23ee4c2 135 if ! command_available 'wget'; then
00c6e1a3 136 echo >&2 "ERROR: an installed wget is required for a network-based update"
46e39c8e 137 exit 1
848ecfa4 138 fi
fecfbf2e
DK
139 if [ ! -d "${APT_DIR}/var/lib/apt/keyrings" ]; then
140 mkdir -p "${APT_DIR}/var/lib/apt/keyrings"
848ecfa4 141 fi
fecfbf2e 142 keyring="${APT_DIR}/var/lib/apt/keyrings/$(basename "$ARCHIVE_KEYRING_URI")"
93886541
MV
143 old_mtime=0
144 if [ -e $keyring ]; then
bc8f83a5 145 old_mtime=$(stat -c %Y "$keyring")
93886541 146 fi
fecfbf2e
DK
147 (cd "${APT_DIR}/var/lib/apt/keyrings"; wget --timeout=90 -q -N "$ARCHIVE_KEYRING_URI")
148 if [ ! -e "$keyring" ]; then
93886541
MV
149 return
150 fi
fecfbf2e 151 new_mtime=$(stat -c %Y "$keyring")
93886541 152 if [ $new_mtime -ne $old_mtime ]; then
3d0def05 153 aptkey_echo "Checking for new archive signing keys now"
fecfbf2e 154 add_keys_with_verify_against_master_keyring "$keyring" "$MASTER_KEYRING"
93886541 155 fi
848ecfa4
MV
156}
157
4a242c5b 158update() {
fecfbf2e 159 if [ ! -f "$ARCHIVE_KEYRING" ]; then
4a242c5b 160 echo >&2 "ERROR: Can't find the archive-keyring"
5b2c6ddc 161 echo >&2 "Is the &keyring-package; package installed?"
4a242c5b
MV
162 exit 1
163 fi
164
3a341a1d
MV
165 # add new keys from the package;
166
167 # we do not use add_keys_with_verify_against_master_keyring here,
1171258a 168 # because "update" is run on regular package updates. A
3a341a1d
MV
169 # attacker might as well replace the master-archive-keyring file
170 # in the package and add his own keys. so this check wouldn't
171 # add any security. we *need* this check on net-update though
f14cde2c 172 import_keyring_into_keyring "$ARCHIVE_KEYRING" '' && cat "${GPGHOMEDIR}/gpgoutput.log"
4a242c5b 173
364af2ef
MV
174 if [ -r "$REMOVED_KEYS" ]; then
175 # remove no-longer supported/used keys
ba72845c 176 get_fingerprints_of_keyring "$REMOVED_KEYS" | while read key; do
5beb682d 177 foreach_keyring_do 'remove_key_from_keyring' "$key"
364af2ef
MV
178 done
179 else
84b286f6 180 echo >&2 "Warning: removed keys keyring $REMOVED_KEYS missing or not readable"
364af2ef 181 fi
4a242c5b
MV
182}
183
04937adc 184remove_key_from_keyring() {
4b30c1dc
DK
185 local KEYRINGFILE="$1"
186 shift
5beb682d
DK
187 # non-existent keyrings have by definition no keys
188 if [ ! -e "$KEYRINGFILE" ]; then
189 return
190 fi
191
0b94a7bc 192 for KEY in "$@"; do
25f27319
DK
193 local FINGERPRINTS="${GPGHOMEDIR}/keyringfile.keylst"
194 get_fingerprints_of_keyring "$KEYRINGFILE" > "$FINGERPRINTS"
f7bd44ba
DKG
195
196 # strip leading 0x, if present:
031a3f25 197 KEY="${KEY#0x}"
f7bd44ba 198
25f27319
DK
199 # check if the key is in this keyring
200 if ! grep -iq "^[0-9A-F]*${KEY}$" "$FINGERPRINTS"; then
4b30c1dc
DK
201 continue
202 fi
203 if [ ! -w "$KEYRINGFILE" ]; then
204 echo >&2 "Key ${KEY} is in keyring ${KEYRINGFILE}, but can't be removed as it is read only."
205 continue
206 fi
207 # check if it is the only key in the keyring and if so remove the keyring altogether
25f27319 208 if [ '1' = "$(uniq "$FINGERPRINTS" | wc -l)" ]; then
4b30c1dc
DK
209 mv -f "$KEYRINGFILE" "${KEYRINGFILE}~" # behave like gpg
210 return
211 fi
212 # we can't just modify pointed to files as these might be in /usr or something
213 local REALTARGET
214 if [ -L "$KEYRINGFILE" ]; then
215 REALTARGET="$(readlink -f "$KEYRINGFILE")"
216 mv -f "$KEYRINGFILE" "${KEYRINGFILE}.dpkg-tmp"
217 cp -a "$REALTARGET" "$KEYRINGFILE"
218 fi
219 # delete the key from the keyring
fecfbf2e 220 aptkey_execute "$GPG_SH" --keyring "$KEYRINGFILE" --batch --delete-keys --yes "$KEY"
4b30c1dc
DK
221 if [ -n "$REALTARGET" ]; then
222 # the real backup is the old link, not the copy we made
223 mv -f "${KEYRINGFILE}.dpkg-tmp" "${KEYRINGFILE}~"
224 fi
225 done
04937adc
DK
226}
227
4b30c1dc
DK
228foreach_keyring_do() {
229 local ACTION="$1"
230 shift
b0d40854 231 # if a --keyring was given, just work on this one
4b30c1dc
DK
232 if [ -n "$FORCED_KEYRING" ]; then
233 $ACTION "$FORCED_KEYRING" "$@"
234 else
235 # otherwise all known keyrings are up for inspection
5beb682d
DK
236 if [ -s "$TRUSTEDFILE" ]; then
237 $ACTION "$TRUSTEDFILE" "$@"
238 fi
4b30c1dc 239 local TRUSTEDPARTS="/etc/apt/trusted.gpg.d"
bc8f83a5 240 eval "$(apt-config shell TRUSTEDPARTS Dir::Etc::TrustedParts/d)"
4b30c1dc 241 if [ -d "$TRUSTEDPARTS" ]; then
0cfec3ab
DK
242 TRUSTEDPARTS="$(readlink -f "$TRUSTEDPARTS")"
243 local TRUSTEDPARTSLIST="$(cd /; find "$TRUSTEDPARTS" -mindepth 1 -maxdepth 1 -name '*.gpg')"
244 for trusted in $(echo "$TRUSTEDPARTSLIST" | sort); do
5beb682d
DK
245 if [ -s "$trusted" ]; then
246 $ACTION "$trusted" "$@"
247 fi
4b30c1dc 248 done
04937adc 249 fi
4b30c1dc 250 fi
04937adc
DK
251}
252
0b94a7bc 253run_cmd_on_keyring() {
5beb682d
DK
254 local KEYRINGFILE="$1"
255 shift
0b94a7bc 256 # fingerprint and co will fail if key isn't in this keyring
fecfbf2e 257 aptkey_execute "$GPG_SH" --keyring "$KEYRINGFILE" --batch "$@" 2>/dev/null || true
5beb682d
DK
258}
259
f14cde2c
DK
260import_keyring_into_keyring() {
261 local FROM="${1:-${GPGHOMEDIR}/pubring.gpg}"
262 local TO="${2:-${GPGHOMEDIR}/pubring.gpg}"
263 shift 2
264 rm -f "${GPGHOMEDIR}/gpgoutput.log"
265 # the idea is simple: We take keys from one keyring and copy it to another
3a8776a3 266 # we do this with so many checks in between to ensure that WE control the
f14cde2c
DK
267 # creation, so we know that the (potentially) created $TO keyring is a
268 # simple keyring rather than a keybox as gpg2 would create it which in turn
269 # can't be read by gpgv.
270 # BEWARE: This is designed more in the way to work with the current
271 # callers, than to have a well defined it would be easy to add new callers to.
272 if [ ! -s "$TO" ]; then
273 if [ -s "$FROM" ]; then
274 if [ -z "$2" ]; then
fecfbf2e 275 if ! aptkey_execute "$GPG_SH" --keyring "$FROM" --export ${1:+"$1"} > "$TO" 2> "${GPGHOMEDIR}/gpgoutput.log"; then
f14cde2c
DK
276 cat >&2 "${GPGHOMEDIR}/gpgoutput.log"
277 false
278 else
279 chmod 0644 -- "$TO"
280 fi
281 else
282 create_new_keyring "$TO"
283 fi
284 else
285 create_new_keyring "$TO"
286 fi
287 elif [ -s "$FROM" ]; then
288 local EXPORTLIMIT="$1"
289 if [ -n "$1$2" ]; then shift; fi
fecfbf2e
DK
290 if ! aptkey_execute "$GPG_SH" --keyring "$FROM" --export ${EXPORTLIMIT:+"$EXPORTLIMIT"} \
291 | aptkey_execute "$GPG_SH" --keyring "$TO" --batch --import "$@" > "${GPGHOMEDIR}/gpgoutput.log" 2>&1; then
f14cde2c
DK
292 cat >&2 "${GPGHOMEDIR}/gpgoutput.log"
293 false
294 fi
0dae96a2
DK
295 fi
296}
297
25f27319
DK
298merge_all_trusted_keyrings_into_pubring() {
299 # does the same as:
300 # foreach_keyring_do 'import_keys_from_keyring' "${GPGHOMEDIR}/pubring.gpg"
301 # but without using gpg, just cat and find
0cfec3ab 302 local PUBRING="$(readlink -f "${GPGHOMEDIR}/pubring.gpg")"
25f27319
DK
303 # if a --keyring was given, just use this one
304 if [ -n "$FORCED_KEYRING" ]; then
305 if [ -s "$FORCED_KEYRING" ]; then
306 cp --dereference "$FORCED_KEYRING" "$PUBRING"
307 fi
308 else
309 # otherwise all known keyrings are merged
310 local TRUSTEDPARTS="/etc/apt/trusted.gpg.d"
311 eval $(apt-config shell TRUSTEDPARTS Dir::Etc::TrustedParts/d)
312 if [ -d "$TRUSTEDPARTS" ]; then
0cfec3ab
DK
313 rm -f "$PUBRING"
314 if [ -s "$TRUSTEDFILE" ]; then
315 cat "$TRUSTEDFILE" > "$PUBRING"
316 fi
317 TRUSTEDPARTS="$(readlink -f "$TRUSTEDPARTS")"
318 (cd /; find "$TRUSTEDPARTS" -mindepth 1 -maxdepth 1 -name '*.gpg' -exec cat {} + >> "$PUBRING";)
25f27319
DK
319 elif [ -s "$TRUSTEDFILE" ]; then
320 cp --dereference "$TRUSTEDFILE" "$PUBRING"
321 fi
322 fi
323
324 if [ ! -s "$PUBRING" ]; then
325 touch "$PUBRING"
326 fi
327}
328
f14cde2c
DK
329import_keys_from_keyring() {
330 import_keyring_into_keyring "$1" "$2"
331}
332
0dae96a2 333merge_keys_into_keyrings() {
f14cde2c 334 import_keyring_into_keyring "$2" "$1" '' --import-options 'merge-only'
0dae96a2
DK
335}
336
337merge_back_changes() {
338 if [ -n "$FORCED_KEYRING" ]; then
339 # if the keyring was forced merge is already done
340 return
341 fi
342 if [ -s "${GPGHOMEDIR}/pubring.gpg" ]; then
343 # merge all updated keys
344 foreach_keyring_do 'merge_keys_into_keyrings' "${GPGHOMEDIR}/pubring.gpg"
345 fi
0b94a7bc 346 # look for keys which were added or removed
0dae96a2
DK
347 get_fingerprints_of_keyring "${GPGHOMEDIR}/pubring.orig.gpg" > "${GPGHOMEDIR}/pubring.orig.keylst"
348 get_fingerprints_of_keyring "${GPGHOMEDIR}/pubring.gpg" > "${GPGHOMEDIR}/pubring.keylst"
25f27319
DK
349 comm -3 "${GPGHOMEDIR}/pubring.keylst" "${GPGHOMEDIR}/pubring.orig.keylst" > "${GPGHOMEDIR}/pubring.diff"
350 # key isn't part of new keyring, so remove
351 cut -f 2 "${GPGHOMEDIR}/pubring.diff" | while read key; do
352 if [ -z "$key" ]; then continue; fi
353 foreach_keyring_do 'remove_key_from_keyring' "$key"
354 done
355 # key is only part of new keyring, so we need to import it
356 cut -f 1 "${GPGHOMEDIR}/pubring.diff" | while read key; do
357 if [ -z "$key" ]; then continue; fi
358 import_keyring_into_keyring '' "$TRUSTEDFILE" "$key"
0dae96a2 359 done
5beb682d
DK
360}
361
362setup_merged_keyring() {
b0d40854 363 if [ -n "$FORCED_KEYID" ]; then
25f27319 364 merge_all_trusted_keyrings_into_pubring
b0d40854
DK
365 FORCED_KEYRING="${GPGHOMEDIR}/forcedkeyid.gpg"
366 TRUSTEDFILE="${FORCED_KEYRING}"
fecfbf2e 367 echo "#!/bin/sh
bc8f83a5 368exec sh '($(escape_shell "${GPG}")' --keyring '$(escape_shell "${TRUSTEDFILE}")' \"\$@\"" > "${GPGHOMEDIR}/gpg.1.sh"
fecfbf2e 369 GPG="${GPGHOMEDIR}/gpg.1.sh"
b0d40854 370 # ignore error as this "just" means we haven't found the forced keyid and the keyring will be empty
f14cde2c 371 import_keyring_into_keyring '' "$TRUSTEDFILE" "$FORCED_KEYID" || true
b0d40854 372 elif [ -z "$FORCED_KEYRING" ]; then
25f27319 373 merge_all_trusted_keyrings_into_pubring
0dae96a2
DK
374 if [ -r "${GPGHOMEDIR}/pubring.gpg" ]; then
375 cp -a "${GPGHOMEDIR}/pubring.gpg" "${GPGHOMEDIR}/pubring.orig.gpg"
376 else
377 touch "${GPGHOMEDIR}/pubring.gpg" "${GPGHOMEDIR}/pubring.orig.gpg"
0740a310 378 fi
fecfbf2e 379 echo "#!/bin/sh
bc8f83a5 380exec sh '$(escape_shell "${GPG}")' --keyring '$(escape_shell "${GPGHOMEDIR}/pubring.gpg")' \"\$@\"" > "${GPGHOMEDIR}/gpg.1.sh"
fecfbf2e 381 GPG="${GPGHOMEDIR}/gpg.1.sh"
0dae96a2 382 else
0dae96a2 383 create_new_keyring "$TRUSTEDFILE"
fecfbf2e 384 echo "#!/bin/sh
bc8f83a5 385exec sh '$(escape_shell "${GPG}")' --keyring '$(escape_shell "${TRUSTEDFILE}")' \"\$@\"" > "${GPGHOMEDIR}/gpg.1.sh"
fecfbf2e 386 GPG="${GPGHOMEDIR}/gpg.1.sh"
5beb682d
DK
387 fi
388}
389
0dae96a2
DK
390create_new_keyring() {
391 # gpg defaults to mode 0600 for new keyrings. Create one with 0644 instead.
392 if ! [ -e "$TRUSTEDFILE" ]; then
393 if [ -w "$(dirname "$TRUSTEDFILE")" ]; then
394 touch -- "$TRUSTEDFILE"
395 chmod 0644 -- "$TRUSTEDFILE"
396 fi
397 fi
398}
5beb682d 399
fecfbf2e
DK
400aptkey_execute() { sh "$@"; }
401
b3d44315 402usage() {
46e39c8e 403 echo "Usage: apt-key [--keyring file] [command] [arguments]"
b3d44315
MV
404 echo
405 echo "Manage apt's list of trusted keys"
406 echo
407 echo " apt-key add <file> - add the key contained in <file> ('-' for stdin)"
408 echo " apt-key del <keyid> - remove the key <keyid>"
bf6d5b42
OS
409 echo " apt-key export <keyid> - output the key <keyid>"
410 echo " apt-key exportall - output all trusted keys"
4a242c5b 411 echo " apt-key update - update keys using the keyring package"
848ecfa4 412 echo " apt-key net-update - update keys using the network"
b3d44315 413 echo " apt-key list - list keys"
a8cabc8f
LB
414 echo " apt-key finger - list fingerprints"
415 echo " apt-key adv - pass advanced options to gpg (download key)"
b3d44315 416 echo
46e39c8e 417 echo "If no specific keyring file is given the command applies to all keyring files."
b3d44315
MV
418}
419
3dc55197
DK
420while [ -n "$1" ]; do
421 case "$1" in
422 --keyring)
423 shift
424 TRUSTEDFILE="$1"
04937adc 425 FORCED_KEYRING="$1"
3dc55197 426 ;;
b0d40854
DK
427 --keyid)
428 shift
429 FORCED_KEYID="$1"
430 ;;
bd7fb5aa
DK
431 --secret-keyring)
432 shift
433 FORCED_SECRET_KEYRING="$1"
33a22672
DK
434 ;;
435 --readonly)
436 merge_back_changes() { true; }
fecfbf2e 437 create_new_keyring() { if [ ! -r "$FORCED_KEYRING" ]; then TRUSTEDFILE='/dev/null'; FORCED_KEYRING="$TRUSTEDFILE"; fi; }
bd7fb5aa 438 ;;
3dc55197
DK
439 --fakeroot)
440 requires_root() { true; }
3dc55197 441 ;;
3d0def05
DK
442 --quiet)
443 aptkey_echo() { true; }
3d0def05 444 ;;
c1642be5
DK
445 --debug1)
446 # some cmds like finger redirect stderr to /dev/null …
fecfbf2e 447 aptkey_execute() { echo 'EXEC:' "$@"; sh "$@"; }
c1642be5
DK
448 ;;
449 --debug2)
450 # … other more complicated ones pipe gpg into gpg.
fecfbf2e 451 aptkey_execute() { echo >&2 'EXEC:' "$@"; sh "$@"; }
c1642be5 452 ;;
3dc55197
DK
453 --*)
454 echo >&2 "Unknown option: $1"
455 usage
456 exit 1;;
457 *)
458 break;;
459 esac
33a22672 460 shift
3dc55197
DK
461done
462
463if [ -z "$TRUSTEDFILE" ]; then
464 TRUSTEDFILE="/etc/apt/trusted.gpg"
465 eval $(apt-config shell TRUSTEDFILE Apt::GPGV::TrustedKeyring)
466 eval $(apt-config shell TRUSTEDFILE Dir::Etc::Trusted/f)
46e39c8e 467fi
46e39c8e 468
b3d44315
MV
469command="$1"
470if [ -z "$command" ]; then
471 usage
472 exit 1
473fi
474shift
475
25f27319
DK
476create_gpg_home() {
477 # gpg needs (in different versions more or less) files to function correctly,
478 # so we give it its own homedir and generate some valid content for it later on
479 if [ -n "$TMPDIR" ]; then
480 # tmpdir is a directory and current user has rwx access to it
481 # same tests as in apt-pkg/contrib/fileutl.cc GetTempDir()
482 if [ ! -d "$TMPDIR" ] || [ ! -r "$TMPDIR" ] || [ ! -w "$TMPDIR" ] || [ ! -x "$TMPDIR" ]; then
483 unset TMPDIR
484 fi
485 fi
486 GPGHOMEDIR="$(mktemp -d)"
bc8f83a5 487 CURRENTTRAP="${CURRENTTRAP} rm -rf '$(escape_shell "${GPGHOMEDIR}")';"
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488 trap "${CURRENTTRAP}" 0 HUP INT QUIT ILL ABRT FPE SEGV PIPE TERM
489 chmod 700 "$GPGHOMEDIR"
490}
491
492prepare_gpg_home() {
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493 # crude detection if we are called from a maintainerscript where the
494 # package depends on gnupg or not. We accept recommends here as
495 # well as the script hopefully uses apt-key optionally then like e.g.
496 # debian-archive-keyring for (upgrade) cleanup did
497 if [ -n "$DPKG_MAINTSCRIPT_PACKAGE" ]; then
2e49f519 498 if ! dpkg-query --show --showformat '${Pre-Depends}${Depends}${Recommends}\n' "$DPKG_MAINTSCRIPT_PACKAGE" 2>/dev/null | grep -q gnupg; then
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499 cat >&2 <<EOF
500Warning: The $DPKG_MAINTSCRIPT_NAME maintainerscript of the package $DPKG_MAINTSCRIPT_PACKAGE
501Warning: seems to use apt-key (provided by apt) without depending on gnupg or gnupg2.
502Warning: This will BREAK in the future and should be fixed by the package maintainer(s).
503Note: Check first if apt-key functionality is needed at all - it probably isn't!
504EOF
505 fi
506 fi
bc8f83a5 507 eval "$(apt-config shell GPG_EXE Apt::Key::gpgcommand)"
e23ee4c2 508 if [ -n "$GPG_EXE" ] && command_available "$GPG_EXE"; then
93d0d08c 509 true
e23ee4c2 510 elif command_available 'gpg'; then
93d0d08c 511 GPG_EXE="gpg"
e23ee4c2 512 elif command_available 'gpg2'; then
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513 GPG_EXE="gpg2"
514 else
515 echo >&2 "Error: gnupg or gnupg2 do not seem to be installed,"
25f27319 516 echo >&2 "Error: but apt-key requires gnupg or gnupg2 for this operation."
9fda3be1 517 echo >&2
93d0d08c 518 exit 255
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519 fi
520
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521 create_gpg_home
522
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523 # create the trustdb with an (empty) dummy keyring
524 # older gpgs required it, newer gpgs even warn that it isn't needed,
525 # but require it nonetheless for some commands, so we just play safe
526 # here for the foreseeable future and create a dummy one
803491dc 527 touch "${GPGHOMEDIR}/empty.gpg"
fecfbf2e 528 if ! "$GPG_EXE" --ignore-time-conflict --no-options --no-default-keyring \
803491dc 529 --homedir "$GPGHOMEDIR" --quiet --check-trustdb --keyring "${GPGHOMEDIR}/empty.gpg" >"${GPGHOMEDIR}/gpgoutput.log" 2>&1; then
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530 cat >&2 "${GPGHOMEDIR}/gpgoutput.log"
531 false
532 fi
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533
534 # now tell gpg that it shouldn't try to maintain this trustdb file
fecfbf2e 535 echo "#!/bin/sh
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536exec '$(escape_shell "${GPG_EXE}")' --ignore-time-conflict --no-options --no-default-keyring \\
537--homedir '$(escape_shell "${GPGHOMEDIR}")' --no-auto-check-trustdb --trust-model always \"\$@\"" > "${GPGHOMEDIR}/gpg.0.sh"
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538 GPG_SH="${GPGHOMEDIR}/gpg.0.sh"
539 GPG="$GPG_SH"
05991180 540
803491dc 541 # We don't usually need a secret keyring, of course, but
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542 # for advanced operations, we might really need a secret keyring after all
543 if [ -n "$FORCED_SECRET_KEYRING" ] && [ -r "$FORCED_SECRET_KEYRING" ]; then
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544 if ! aptkey_execute "$GPG" -v --batch --import "$FORCED_SECRET_KEYRING" >"${GPGHOMEDIR}/gpgoutput.log" 2>&1; then
545 cat >&2 "${GPGHOMEDIR}/gpgoutput.log"
546 false
547 fi
548 else
549 # and then, there are older versions of gpg which panic and implode
550 # if there isn't one available - and writeable for imports
551 # and even if not output is littered with the creation of a secring,
552 # so lets call import once to have it create what it wants in silence
553 echo -n | aptkey_execute "$GPG" --batch --import >/dev/null 2>&1 || true
bd7fb5aa 554 fi
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555}
556
557if [ "$command" != 'help' ] && [ "$command" != 'verify' ]; then
558 prepare_gpg_home
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559fi
560
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561case "$command" in
562 add)
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563 requires_root
564 setup_merged_keyring
fecfbf2e 565 aptkey_execute "$GPG" --quiet --batch --import "$@"
0dae96a2 566 merge_back_changes
5beb682d 567 aptkey_echo "OK"
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568 ;;
569 del|rm|remove)
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570 requires_root
571 foreach_keyring_do 'remove_key_from_keyring' "$@"
572 aptkey_echo "OK"
b3d44315 573 ;;
4a242c5b 574 update)
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575 requires_root
576 setup_merged_keyring
4a242c5b 577 update
0dae96a2 578 merge_back_changes
4a242c5b 579 ;;
848ecfa4 580 net-update)
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581 requires_root
582 setup_merged_keyring
848ecfa4 583 net_update
0dae96a2 584 merge_back_changes
848ecfa4 585 ;;
b3d44315 586 list)
0b94a7bc 587 foreach_keyring_do 'run_cmd_on_keyring' --list-keys "$@"
5beb682d 588 ;;
b3d44315 589 finger*)
0b94a7bc 590 foreach_keyring_do 'run_cmd_on_keyring' --fingerprint "$@"
5beb682d 591 ;;
4f51a496 592 export|exportall)
25f27319 593 merge_all_trusted_keyrings_into_pubring
fecfbf2e 594 aptkey_execute "$GPG_SH" --keyring "${GPGHOMEDIR}/pubring.gpg" --armor --export "$@"
5beb682d 595 ;;
b3d44315 596 adv*)
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597 setup_merged_keyring
598 aptkey_echo "Executing: $GPG $*"
fecfbf2e 599 aptkey_execute "$GPG" "$@"
0dae96a2 600 merge_back_changes
5beb682d 601 ;;
c46a36ad 602 verify)
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603 GPGV=''
604 eval $(apt-config shell GPGV Apt::Key::gpgvcommand)
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605 if [ -n "$GPGV" ] && command_available "$GPGV"; then true;
606 elif command_available 'gpgv'; then GPGV='gpgv';
607 elif command_available 'gpgv2'; then GPGV='gpgv2';
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608 else
609 echo >&2 'ERROR: gpgv or gpgv2 required for verification'
610 exit 29
f14cde2c 611 fi
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612 # for a forced keyid we need gpg --export, so full wrapping required
613 if [ -n "$FORCED_KEYID" ]; then
614 prepare_gpg_home
615 else
616 create_gpg_home
617 fi
618 setup_merged_keyring
619 if [ -n "$FORCED_KEYRING" ]; then
fecfbf2e 620 "$GPGV" --homedir "${GPGHOMEDIR}" --keyring "${FORCED_KEYRING}" --ignore-time-conflict "$@"
c46a36ad 621 else
fecfbf2e 622 "$GPGV" --homedir "${GPGHOMEDIR}" --keyring "${GPGHOMEDIR}/pubring.gpg" --ignore-time-conflict "$@"
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623 fi
624 ;;
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625 help)
626 usage
627 ;;
628 *)
629 usage
630 exit 1
631 ;;
632esac