3
3
# Mandos key generator - create a new OpenPGP key for a Mandos client
5
# Copyright © 2008-2018 Teddy Hogeborn
6
# Copyright © 2008-2018 Björn Påhlsson
5
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
8
# This file is part of Mandos.
10
# Mandos is free software: you can redistribute it and/or modify it
11
# under the terms of the GNU General Public License as published by
7
# This program is free software: you can redistribute it and/or modify
8
# it under the terms of the GNU General Public License as published by
12
9
# the Free Software Foundation, either version 3 of the License, or
13
10
# (at your option) any later version.
15
# Mandos is distributed in the hope that it will be useful, but
16
# WITHOUT ANY WARRANTY; without even the implied warranty of
12
# This program is distributed in the hope that it will be useful,
13
# but WITHOUT ANY WARRANTY; without even the implied warranty of
17
14
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18
15
# GNU General Public License for more details.
20
17
# You should have received a copy of the GNU General Public License
21
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
23
# Contact the authors at <mandos@recompile.se>.
28
KEYDIR="/etc/keys/mandos"
33
KEYNAME="`hostname --fqdn 2>/dev/null || hostname`"
18
# along with this program. If not, see <http://www.gnu.org/licenses/>.
20
# Contact the authors at <mandos@fukt.bsnet.se>.
30
KEYNAME="`hostname --fqdn`"
32
KEYCOMMENT="Mandos client key"
39
35
KEYCOMMENT_ORIG="$KEYCOMMENT"
42
if [ ! -d "$KEYDIR" ]; then
43
KEYDIR="/etc/mandos/keys"
47
TEMP=`getopt --options vhpF:d:t:l:s:L:n:e:c:x:fS \
48
--longoptions version,help,password,passfile:,dir:,type:,length:,subtype:,sublength:,name:,email:,comment:,expire:,force,no-ssh \
39
TEMP=`getopt --options vhd:t:l:n:e:c:x:f \
40
--longoptions version,help,password,dir:,type:,length:,subtype:,sublength:,name:,email:,comment:,expire:,force \
49
41
--name "$0" -- "$@"`
52
basename="`basename "$0"`"
44
basename="`basename $0`"
54
46
Usage: $basename [ -v | --version ]
55
47
$basename [ -h | --help ]
57
49
$basename [ OPTIONS ]
58
50
Encrypted password creation:
59
51
$basename { -p | --password } [ --name NAME ] [ --dir DIR]
60
$basename { -F | --passfile } FILE [ --name NAME ] [ --dir DIR]
62
53
Key creation options:
63
54
-v, --version Show program's version number and exit
64
55
-h, --help Show this help message and exit
65
56
-d DIR, --dir DIR Target directory for key files
66
-t TYPE, --type TYPE Key type. Default is RSA.
57
-t TYPE, --type TYPE Key type. Default is DSA.
67
58
-l BITS, --length BITS
68
Key length in bits. Default is 4096.
59
Key length in bits. Default is 1024.
69
60
-s TYPE, --subtype TYPE
70
Subkey type. Default is RSA.
61
Subkey type. Default is ELG-E.
71
62
-L BITS, --sublength BITS
72
Subkey length in bits. Default is 4096.
63
Subkey length in bits. Default is 2048.
73
64
-n NAME, --name NAME Name of key. Default is the FQDN.
74
65
-e ADDRESS, --email ADDRESS
75
66
Email address of key. Default is empty.
76
-c TEXT, --comment TEXT
77
Comment field for key. The default is empty.
67
-c COMMENT, --comment COMMENT
68
Comment field for key. The default value is
78
70
-x TIME, --expire TIME
79
71
Key expire time. Default is no expiration.
80
72
See gpg(1) for syntax.
81
-f, --force Force overwriting old key files.
73
-f, --force Force overwriting old keys.
83
75
Password creation options:
84
-p, --password Create an encrypted password using the key in
85
the key directory. All options other than
86
--dir and --name are ignored.
87
-F FILE, --passfile FILE
88
Encrypt a password from FILE using the key in
89
the key directory. All options other than
90
--dir and --name are ignored.
91
-S, --no-ssh Don't get SSH key or set "checker" option.
76
-p, --password Create an encrypted password using the keys in
77
the key directory. All options other than
78
--keydir and --name are ignored.
123
108
PUBKEYFILE="$KEYDIR/pubkey.txt"
125
110
# Check for some invalid values
126
if [ ! -d "$KEYDIR" ]; then
111
if [ -d "$KEYDIR" ]; then :; else
127
112
echo "$KEYDIR not a directory" >&2
130
if [ ! -r "$KEYDIR" ]; then
131
echo "Directory $KEYDIR not readable" >&2
115
if [ -w "$KEYDIR" ]; then :; else
116
echo "Directory $KEYDIR not writeable" >&2
120
if [ "$mode" = password -a -e "$KEYDIR/trustdb.gpg.lock" ]; then
121
echo "Key directory has locked trustdb; aborting." >&2
135
125
if [ "$mode" = keygen ]; then
136
if [ ! -w "$KEYDIR" ]; then
137
echo "Directory $KEYDIR not writeable" >&2
140
126
if [ -z "$KEYTYPE" ]; then
141
127
echo "Empty key type" >&2
176
162
if [ -n "$KEYEMAIL" ]; then
177
163
KEYEMAILLINE="Name-Email: $KEYEMAIL"
180
166
# Create temporary gpg batch file
181
BATCHFILE="`mktemp -t mandos-keygen-batch.XXXXXXXXXX`"
167
BATCHFILE="`mktemp -t mandos-gpg-batch.XXXXXXXXXX`"
184
170
if [ "$mode" = password ]; then
185
171
# Create temporary encrypted password file
186
SECFILE="`mktemp -t mandos-keygen-secfile.XXXXXXXXXX`"
189
# Create temporary key ring directory
190
RINGDIR="`mktemp -d -t mandos-keygen-keyrings.XXXXXXXXXX`"
172
SECFILE="`mktemp -t mandos-gpg-secfile.XXXXXXXXXX`"
175
# Create temporary key rings
176
SECRING="`mktemp -t mandos-gpg-secring.XXXXXXXXXX`"
177
PUBRING="`mktemp -t mandos-gpg-pubring.XXXXXXXXXX`"
179
if [ "$mode" = password ]; then
180
# If a trustdb.gpg file does not already exist, schedule it for
181
# deletion when we are done.
182
if ! [ -e "$KEYDIR/trustdb.gpg" ]; then
183
TRUSTDB="$KEYDIR/trustdb.gpg"
192
187
# Remove temporary files on exit
195
test -n \"$SECFILE\" && shred --remove \"$SECFILE\"; \
196
shred --remove \"$RINGDIR\"/sec* 2>/dev/null;
197
test -n \"$BATCHFILE\" && rm --force \"$BATCHFILE\"; \
198
rm --recursive --force \"$RINGDIR\";
199
tty --quiet && stty echo; \
190
rm --force $PUBRING ${PUBRING}~ $BATCHFILE $TRUSTDB; \
191
shred --remove $SECRING $SECFILE; \
206
197
if [ "$mode" = keygen ]; then
207
198
# Create batch file for GnuPG
208
199
cat >"$BATCHFILE" <<-EOF
209
200
Key-Type: $KEYTYPE
210
201
Key-Length: $KEYLENGTH
202
#Key-Usage: encrypt,sign,auth
212
203
Subkey-Type: $SUBKEYTYPE
213
204
Subkey-Length: $SUBKEYLENGTH
214
Subkey-Usage: encrypt
205
#Subkey-Usage: encrypt,sign,auth
215
206
Name-Real: $KEYNAME
218
209
Expire-Date: $KEYEXPIRE
219
210
#Preferences: <string>
220
211
#Handle: <no-spaces>
221
#%pubring pubring.gpg
222
#%secring secring.gpg
229
Note: Due to entropy requirements, key generation could take
230
anything from a few minutes to SEVERAL HOURS. Please be
231
patient and/or supply the system with more entropy if needed.
237
# Make sure trustdb.gpg exists;
238
# this is a workaround for Debian bug #737128
239
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
240
--homedir "$RINGDIR" \
241
--import-ownertrust < /dev/null
242
217
# Generate a new key in the key rings
243
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
244
--homedir "$RINGDIR" --trust-model always \
218
gpg --no-random-seed-file --quiet --batch --no-tty \
219
--no-default-keyring --no-options --enable-dsa2 \
220
--secret-keyring "$SECRING" --keyring "$PUBRING" \
245
221
--gen-key "$BATCHFILE"
246
222
rm --force "$BATCHFILE"
253
224
# Backup any old key files
254
225
if cp --backup=numbered --force "$SECKEYFILE" "$SECKEYFILE" \
255
226
2>/dev/null; then
269
240
FILECOMMENT="$FILECOMMENT <$KEYEMAIL>"
272
# Export key from key rings to key files
273
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
274
--homedir "$RINGDIR" --armor --export-options export-minimal \
275
--comment "$FILECOMMENT" --output "$SECKEYFILE" \
277
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
278
--homedir "$RINGDIR" --armor --export-options export-minimal \
279
--comment "$FILECOMMENT" --output "$PUBKEYFILE" --export
243
# Export keys from key rings to key files
244
gpg --no-random-seed-file --quiet --batch --no-tty --armor \
245
--no-default-keyring --no-options --enable-dsa2 \
246
--secret-keyring "$SECRING" --keyring "$PUBRING" \
247
--export-options export-minimal --comment "$FILECOMMENT" \
248
--output "$SECKEYFILE" --export-secret-keys
249
gpg --no-random-seed-file --quiet --batch --no-tty --armor \
250
--no-default-keyring --no-options --enable-dsa2 \
251
--secret-keyring "$SECRING" --keyring "$PUBRING" \
252
--export-options export-minimal --comment "$FILECOMMENT" \
253
--output "$PUBKEYFILE" --export
282
256
if [ "$mode" = password ]; then
286
[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]) SSH=1;;
287
[Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|*) SSH=0;;
290
if [ $SSH -eq 1 ]; then
291
for ssh_keytype in ecdsa-sha2-nistp256 ed25519 rsa; do
293
ssh_fingerprint="`ssh-keyscan -t $ssh_keytype localhost 2>/dev/null`"
296
if [ $err -ne 0 ]; then
300
if [ -n "$ssh_fingerprint" ]; then
301
ssh_fingerprint="${ssh_fingerprint#localhost }"
307
# Import key into temporary key rings
308
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
309
--homedir "$RINGDIR" --trust-model always --armor \
310
--import "$SECKEYFILE"
311
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
312
--homedir "$RINGDIR" --trust-model always --armor \
313
--import "$PUBKEYFILE"
257
# Import keys into temporary key rings
258
gpg --no-random-seed-file --quiet --batch --no-tty --armor \
259
--no-default-keyring --no-options --enable-dsa2 \
260
--homedir "$KEYDIR" --no-permission-warning \
261
--secret-keyring "$SECRING" --keyring "$PUBRING" \
262
--trust-model always --import "$SECKEYFILE"
263
gpg --no-random-seed-file --quiet --batch --no-tty --armor \
264
--no-default-keyring --no-options --enable-dsa2 \
265
--homedir "$KEYDIR" --no-permission-warning \
266
--secret-keyring "$SECRING" --keyring "$PUBRING" \
267
--trust-model always --import "$PUBKEYFILE"
315
269
# Get fingerprint of key
316
FINGERPRINT="`gpg --quiet --batch --no-tty --no-options \
317
--enable-dsa2 --homedir "$RINGDIR" --trust-model always \
318
--fingerprint --with-colons \
320
--expression='/^fpr:/{s/^fpr:.*:\\([0-9A-Z]*\\):\$/\\1/p;q}'`"
270
FINGERPRINT="`gpg --no-random-seed-file --quiet --batch --no-tty \
271
--armor --no-default-keyring --no-options --enable-dsa2 \
272
--homedir \"$KEYDIR\" --no-permission-warning \
273
--secret-keyring \"$SECRING\" --keyring \"$PUBRING\" \
274
--trust-model always --fingerprint --with-colons \
275
| sed -n -e '/^fpr:/{s/^fpr:.*:\\([0-9A-Z]*\\):\$/\\1/p;q}'`"
322
277
test -n "$FINGERPRINT"
324
279
FILECOMMENT="Encrypted password for a Mandos client"
326
while [ ! -s "$SECFILE" ]; do
327
if [ -n "$PASSFILE" ]; then
330
tty --quiet && stty -echo
331
echo -n "Enter passphrase: " >/dev/tty
333
tty --quiet && echo >&2
334
echo -n "Repeat passphrase: " >/dev/tty
340
if [ "$first" != "$second" ]; then
341
echo "Passphrase mismatch" >&2
342
touch "$RINGDIR"/mismatch
346
fi | gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
347
--homedir "$RINGDIR" --trust-model always --armor \
348
--encrypt --sign --recipient "$FINGERPRINT" --comment \
349
"$FILECOMMENT" > "$SECFILE"
350
if [ -e "$RINGDIR"/mismatch ]; then
351
rm --force "$RINGDIR"/mismatch
282
echo -n "Enter passphrase: " >&2
284
| gpg --no-random-seed-file --batch --no-tty --armor \
285
--no-default-keyring --no-options --enable-dsa2 \
286
--homedir "$KEYDIR" --no-permission-warning \
287
--secret-keyring "$SECRING" --keyring "$PUBRING" \
288
--trust-model always --encrypt --recipient "$FINGERPRINT" \
289
--comment "$FILECOMMENT" \
363
297
fingerprint = $FINGERPRINT
366
sed --quiet --expression='
367
301
/^-----BEGIN PGP MESSAGE-----$/,/^-----END PGP MESSAGE-----$/{
369
303
# Remove 24-bit Radix-64 checksum