3
# Mandos key generator - create a new OpenPGP key for a Mandos client
5
# Copyright © 2008-2017 Teddy Hogeborn
6
# Copyright © 2008-2017 Björn Påhlsson
8
# This program is free software: you can redistribute it and/or modify
9
# it under the terms of the GNU General Public License as published by
10
# the Free Software Foundation, either version 3 of the License, or
11
# (at your option) any later version.
13
# This program is distributed in the hope that it will be useful,
14
# but WITHOUT ANY WARRANTY; without even the implied warranty of
15
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16
# GNU General Public License for more details.
18
# You should have received a copy of the GNU General Public License
19
# along with this program. If not, see <http://www.gnu.org/licenses/>.
21
# Contact the authors at <mandos@recompile.se>.
26
KEYDIR="/etc/keys/mandos"
31
KEYNAME="`hostname --fqdn 2>/dev/null || hostname`"
37
KEYCOMMENT_ORIG="$KEYCOMMENT"
40
if [ ! -d "$KEYDIR" ]; then
41
KEYDIR="/etc/mandos/keys"
45
TEMP=`getopt --options vhpF:d:t:l:s:L:n:e:c:x:fS \
46
--longoptions version,help,password,passfile:,dir:,type:,length:,subtype:,sublength:,name:,email:,comment:,expire:,force,no-ssh \
50
basename="`basename "$0"`"
52
Usage: $basename [ -v | --version ]
53
$basename [ -h | --help ]
56
Encrypted password creation:
57
$basename { -p | --password } [ --name NAME ] [ --dir DIR]
58
$basename { -F | --passfile } FILE [ --name NAME ] [ --dir DIR]
61
-v, --version Show program's version number and exit
62
-h, --help Show this help message and exit
63
-d DIR, --dir DIR Target directory for key files
64
-t TYPE, --type TYPE Key type. Default is RSA.
65
-l BITS, --length BITS
66
Key length in bits. Default is 4096.
67
-s TYPE, --subtype TYPE
68
Subkey type. Default is RSA.
69
-L BITS, --sublength BITS
70
Subkey length in bits. Default is 4096.
71
-n NAME, --name NAME Name of key. Default is the FQDN.
72
-e ADDRESS, --email ADDRESS
73
Email address of key. Default is empty.
74
-c TEXT, --comment TEXT
75
Comment field for key. The default is empty.
76
-x TIME, --expire TIME
77
Key expire time. Default is no expiration.
78
See gpg(1) for syntax.
79
-f, --force Force overwriting old key files.
81
Password creation options:
82
-p, --password Create an encrypted password using the key in
83
the key directory. All options other than
84
--dir and --name are ignored.
85
-F FILE, --passfile FILE
86
Encrypt a password from FILE using the key in
87
the key directory. All options other than
88
--dir and --name are ignored.
89
-S, --no-ssh Don't get SSH key or set "checker" option.
96
-p|--password) mode=password; shift;;
97
-F|--passfile) mode=password; PASSFILE="$2"; shift 2;;
98
-d|--dir) KEYDIR="$2"; shift 2;;
99
-t|--type) KEYTYPE="$2"; shift 2;;
100
-s|--subtype) SUBKEYTYPE="$2"; shift 2;;
101
-l|--length) KEYLENGTH="$2"; shift 2;;
102
-L|--sublength) SUBKEYLENGTH="$2"; shift 2;;
103
-n|--name) KEYNAME="$2"; shift 2;;
104
-e|--email) KEYEMAIL="$2"; shift 2;;
105
-c|--comment) KEYCOMMENT="$2"; shift 2;;
106
-x|--expire) KEYEXPIRE="$2"; shift 2;;
107
-f|--force) FORCE=yes; shift;;
108
-S|--no-ssh) SSH=no; shift;;
109
-v|--version) echo "$0 $VERSION"; exit;;
110
-h|--help) help; exit;;
112
*) echo "Internal error" >&2; exit 1;;
115
if [ "$#" -gt 0 ]; then
116
echo "Unknown arguments: '$*'" >&2
120
SECKEYFILE="$KEYDIR/seckey.txt"
121
PUBKEYFILE="$KEYDIR/pubkey.txt"
123
# Check for some invalid values
124
if [ ! -d "$KEYDIR" ]; then
125
echo "$KEYDIR not a directory" >&2
128
if [ ! -r "$KEYDIR" ]; then
129
echo "Directory $KEYDIR not readable" >&2
133
if [ "$mode" = keygen ]; then
134
if [ ! -w "$KEYDIR" ]; then
135
echo "Directory $KEYDIR not writeable" >&2
138
if [ -z "$KEYTYPE" ]; then
139
echo "Empty key type" >&2
143
if [ -z "$KEYNAME" ]; then
144
echo "Empty key name" >&2
148
if [ -z "$KEYLENGTH" ] || [ "$KEYLENGTH" -lt 512 ]; then
149
echo "Invalid key length" >&2
153
if [ -z "$KEYEXPIRE" ]; then
154
echo "Empty key expiration" >&2
158
# Make FORCE be 0 or 1
160
[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]) FORCE=1;;
161
[Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|*) FORCE=0;;
164
if [ \( -e "$SECKEYFILE" -o -e "$PUBKEYFILE" \) \
165
-a "$FORCE" -eq 0 ]; then
166
echo "Refusing to overwrite old key files; use --force" >&2
170
# Set lines for GnuPG batch file
171
if [ -n "$KEYCOMMENT" ]; then
172
KEYCOMMENTLINE="Name-Comment: $KEYCOMMENT"
174
if [ -n "$KEYEMAIL" ]; then
175
KEYEMAILLINE="Name-Email: $KEYEMAIL"
178
# Create temporary gpg batch file
179
BATCHFILE="`mktemp -t mandos-keygen-batch.XXXXXXXXXX`"
182
if [ "$mode" = password ]; then
183
# Create temporary encrypted password file
184
SECFILE="`mktemp -t mandos-keygen-secfile.XXXXXXXXXX`"
187
# Create temporary key ring directory
188
RINGDIR="`mktemp -d -t mandos-keygen-keyrings.XXXXXXXXXX`"
190
# Remove temporary files on exit
193
test -n \"$SECFILE\" && shred --remove \"$SECFILE\"; \
194
shred --remove \"$RINGDIR\"/sec* 2>/dev/null;
195
test -n \"$BATCHFILE\" && rm --force \"$BATCHFILE\"; \
196
rm --recursive --force \"$RINGDIR\";
197
tty --quiet && stty echo; \
204
if [ "$mode" = keygen ]; then
205
# Create batch file for GnuPG
206
cat >"$BATCHFILE" <<-EOF
208
Key-Length: $KEYLENGTH
210
Subkey-Type: $SUBKEYTYPE
211
Subkey-Length: $SUBKEYLENGTH
212
Subkey-Usage: encrypt
216
Expire-Date: $KEYEXPIRE
217
#Preferences: <string>
219
#%pubring pubring.gpg
220
#%secring secring.gpg
227
Note: Due to entropy requirements, key generation could take
228
anything from a few minutes to SEVERAL HOURS. Please be
229
patient and/or supply the system with more entropy if needed.
235
# Make sure trustdb.gpg exists;
236
# this is a workaround for Debian bug #737128
237
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
238
--homedir "$RINGDIR" \
239
--import-ownertrust < /dev/null
240
# Generate a new key in the key rings
241
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
242
--homedir "$RINGDIR" --trust-model always \
243
--gen-key "$BATCHFILE"
244
rm --force "$BATCHFILE"
251
# Backup any old key files
252
if cp --backup=numbered --force "$SECKEYFILE" "$SECKEYFILE" \
254
shred --remove "$SECKEYFILE"
256
if cp --backup=numbered --force "$PUBKEYFILE" "$PUBKEYFILE" \
258
rm --force "$PUBKEYFILE"
261
FILECOMMENT="Mandos client key for $KEYNAME"
262
if [ "$KEYCOMMENT" != "$KEYCOMMENT_ORIG" ]; then
263
FILECOMMENT="$FILECOMMENT ($KEYCOMMENT)"
266
if [ -n "$KEYEMAIL" ]; then
267
FILECOMMENT="$FILECOMMENT <$KEYEMAIL>"
270
# Export key from key rings to key files
271
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
272
--homedir "$RINGDIR" --armor --export-options export-minimal \
273
--comment "$FILECOMMENT" --output "$SECKEYFILE" \
275
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
276
--homedir "$RINGDIR" --armor --export-options export-minimal \
277
--comment "$FILECOMMENT" --output "$PUBKEYFILE" --export
280
if [ "$mode" = password ]; then
284
[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]) SSH=1;;
285
[Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|*) SSH=0;;
288
if [ $SSH -eq 1 ]; then
289
for ssh_keytype in ecdsa-sha2-nistp256 ed25519 rsa; do
291
ssh_fingerprint="`ssh-keyscan -t $ssh_keytype localhost 2>/dev/null`"
293
if [ $? -ne 0 ]; then
297
if [ -n "$ssh_fingerprint" ]; then
298
ssh_fingerprint="${ssh_fingerprint#localhost }"
304
# Import key into temporary key rings
305
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
306
--homedir "$RINGDIR" --trust-model always --armor \
307
--import "$SECKEYFILE"
308
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
309
--homedir "$RINGDIR" --trust-model always --armor \
310
--import "$PUBKEYFILE"
312
# Get fingerprint of key
313
FINGERPRINT="`gpg --quiet --batch --no-tty --no-options \
314
--enable-dsa2 --homedir "$RINGDIR" --trust-model always \
315
--fingerprint --with-colons \
317
--expression='/^fpr:/{s/^fpr:.*:\\([0-9A-Z]*\\):\$/\\1/p;q}'`"
319
test -n "$FINGERPRINT"
321
FILECOMMENT="Encrypted password for a Mandos client"
323
while [ ! -s "$SECFILE" ]; do
324
if [ -n "$PASSFILE" ]; then
327
tty --quiet && stty -echo
328
echo -n "Enter passphrase: " >/dev/tty
330
tty --quiet && echo >&2
331
echo -n "Repeat passphrase: " >/dev/tty
337
if [ "$first" != "$second" ]; then
338
echo "Passphrase mismatch" >&2
339
touch "$RINGDIR"/mismatch
343
fi | gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
344
--homedir "$RINGDIR" --trust-model always --armor \
345
--encrypt --sign --recipient "$FINGERPRINT" --comment \
346
"$FILECOMMENT" > "$SECFILE"
347
if [ -e "$RINGDIR"/mismatch ]; then
348
rm --force "$RINGDIR"/mismatch
360
fingerprint = $FINGERPRINT
363
sed --quiet --expression='
364
/^-----BEGIN PGP MESSAGE-----$/,/^-----END PGP MESSAGE-----$/{
366
# Remove 24-bit Radix-64 checksum
372
if [ -n "$ssh_fingerprint" ]; then
373
echo 'checker = ssh-keyscan -t '"$ssh_keytype"' %%(host)s 2>/dev/null | grep --fixed-strings --line-regexp --quiet --regexp=%%(host)s" %(ssh_fingerprint)s"'
374
echo "ssh_fingerprint = ${ssh_fingerprint}"
381
# Remove the password file, if any
382
if [ -n "$SECFILE" ]; then
383
shred --remove "$SECFILE"
385
# Remove the key rings
386
shred --remove "$RINGDIR"/sec* 2>/dev/null
387
rm --recursive --force "$RINGDIR"
added
removed
mandos-keygen
