3
# Mandos key generator - create a new OpenPGP key for a Mandos client
5
# Copyright © 2008 Teddy Hogeborn
6
# Copyright © 2008 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@fukt.bsnet.se>.
26
KEYDIR="/etc/keys/mandos"
31
KEYNAME="`hostname --fqdn 2>/dev/null || hostname`"
33
KEYCOMMENT="Mandos client key"
36
KEYCOMMENT_ORIG="$KEYCOMMENT"
39
if [ ! -d "$KEYDIR" ]; then
40
KEYDIR="/etc/mandos/keys"
44
TEMP=`getopt --options vhpF:d:t:l:s:L:n:e:c:x:f \
45
--longoptions version,help,password,passfile:,dir:,type:,length:,subtype:,sublength:,name:,email:,comment:,expire:,force \
49
basename="`basename $0`"
51
Usage: $basename [ -v | --version ]
52
$basename [ -h | --help ]
55
Encrypted password creation:
56
$basename { -p | --password } [ --name NAME ] [ --dir DIR]
57
$basename { -F | --passfile } FILE [ --name NAME ] [ --dir DIR]
60
-v, --version Show program's version number and exit
61
-h, --help Show this help message and exit
62
-d DIR, --dir DIR Target directory for key files
63
-t TYPE, --type TYPE Key type. Default is DSA.
64
-l BITS, --length BITS
65
Key length in bits. Default is 2048.
66
-s TYPE, --subtype TYPE
67
Subkey type. Default is ELG-E.
68
-L BITS, --sublength BITS
69
Subkey length in bits. Default is 2048.
70
-n NAME, --name NAME Name of key. Default is the FQDN.
71
-e ADDRESS, --email ADDRESS
72
Email address of key. Default is empty.
73
-c TEXT, --comment TEXT
74
Comment field for key. The default value is
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.
95
-p|--password) mode=password; shift;;
96
-F|--passfile) mode=password; PASSFILE="$2"; shift 2;;
97
-d|--dir) KEYDIR="$2"; shift 2;;
98
-t|--type) KEYTYPE="$2"; shift 2;;
99
-s|--subtype) SUBKEYTYPE="$2"; shift 2;;
100
-l|--length) KEYLENGTH="$2"; shift 2;;
101
-L|--sublength) SUBKEYLENGTH="$2"; shift 2;;
102
-n|--name) KEYNAME="$2"; shift 2;;
103
-e|--email) KEYEMAIL="$2"; shift 2;;
104
-c|--comment) KEYCOMMENT="$2"; shift 2;;
105
-x|--expire) KEYEXPIRE="$2"; shift 2;;
106
-f|--force) FORCE=yes; shift;;
107
-v|--version) echo "$0 $VERSION"; exit;;
108
-h|--help) help; exit;;
110
*) echo "Internal error" >&2; exit 1;;
113
if [ "$#" -gt 0 ]; then
114
echo "Unknown arguments: '$@'" >&2
118
SECKEYFILE="$KEYDIR/seckey.txt"
119
PUBKEYFILE="$KEYDIR/pubkey.txt"
121
# Check for some invalid values
122
if [ ! -d "$KEYDIR" ]; then
123
echo "$KEYDIR not a directory" >&2
126
if [ ! -r "$KEYDIR" ]; then
127
echo "Directory $KEYDIR not readable" >&2
131
if [ "$mode" = keygen ]; then
132
if [ ! -w "$KEYDIR" ]; then
133
echo "Directory $KEYDIR not writeable" >&2
136
if [ -z "$KEYTYPE" ]; then
137
echo "Empty key type" >&2
141
if [ -z "$KEYNAME" ]; then
142
echo "Empty key name" >&2
146
if [ -z "$KEYLENGTH" ] || [ "$KEYLENGTH" -lt 512 ]; then
147
echo "Invalid key length" >&2
151
if [ -z "$KEYEXPIRE" ]; then
152
echo "Empty key expiration" >&2
156
# Make FORCE be 0 or 1
158
[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]) FORCE=1;;
159
[Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|*) FORCE=0;;
162
if [ \( -e "$SECKEYFILE" -o -e "$PUBKEYFILE" \) \
163
-a "$FORCE" -eq 0 ]; then
164
echo "Refusing to overwrite old key files; use --force" >&2
168
# Set lines for GnuPG batch file
169
if [ -n "$KEYCOMMENT" ]; then
170
KEYCOMMENTLINE="Name-Comment: $KEYCOMMENT"
172
if [ -n "$KEYEMAIL" ]; then
173
KEYEMAILLINE="Name-Email: $KEYEMAIL"
176
# Create temporary gpg batch file
177
BATCHFILE="`mktemp -t mandos-keygen-batch.XXXXXXXXXX`"
180
if [ "$mode" = password ]; then
181
# Create temporary encrypted password file
182
SECFILE="`mktemp -t mandos-keygen-secfile.XXXXXXXXXX`"
185
# Create temporary key ring directory
186
RINGDIR="`mktemp -d -t mandos-keygen-keyrings.XXXXXXXXXX`"
188
# Remove temporary files on exit
191
test -n \"$SECFILE\" && shred --remove \"$SECFILE\"; \
192
shred --remove \"$RINGDIR\"/sec*;
193
test -n \"$BATCHFILE\" && rm --force \"$BATCHFILE\"; \
194
rm --recursive --force \"$RINGDIR\";
200
if [ "$mode" = keygen ]; then
201
# Create batch file for GnuPG
202
cat >"$BATCHFILE" <<-EOF
204
Key-Length: $KEYLENGTH
205
#Key-Usage: encrypt,sign,auth
206
Subkey-Type: $SUBKEYTYPE
207
Subkey-Length: $SUBKEYLENGTH
208
#Subkey-Usage: encrypt,sign,auth
212
Expire-Date: $KEYEXPIRE
213
#Preferences: <string>
215
#%pubring pubring.gpg
216
#%secring secring.gpg
220
# Generate a new key in the key rings
221
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
222
--homedir "$RINGDIR" --trust-model always \
223
--gen-key "$BATCHFILE"
224
rm --force "$BATCHFILE"
226
# Backup any old key files
227
if cp --backup=numbered --force "$SECKEYFILE" "$SECKEYFILE" \
229
shred --remove "$SECKEYFILE"
231
if cp --backup=numbered --force "$PUBKEYFILE" "$PUBKEYFILE" \
233
rm --force "$PUBKEYFILE"
236
FILECOMMENT="Mandos client key for $KEYNAME"
237
if [ "$KEYCOMMENT" != "$KEYCOMMENT_ORIG" ]; then
238
FILECOMMENT="$FILECOMMENT ($KEYCOMMENT)"
241
if [ -n "$KEYEMAIL" ]; then
242
FILECOMMENT="$FILECOMMENT <$KEYEMAIL>"
245
# Export key from key rings to key files
246
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
247
--homedir "$RINGDIR" --armor --export-options export-minimal \
248
--comment "$FILECOMMENT" --output "$SECKEYFILE" \
250
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
251
--homedir "$RINGDIR" --armor --export-options export-minimal \
252
--comment "$FILECOMMENT" --output "$PUBKEYFILE" --export
255
if [ "$mode" = password ]; then
256
# Import key into temporary key rings
257
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
258
--homedir "$RINGDIR" --trust-model always --armor \
259
--import "$SECKEYFILE"
260
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
261
--homedir "$RINGDIR" --trust-model always --armor \
262
--import "$PUBKEYFILE"
264
# Get fingerprint of key
265
FINGERPRINT="`gpg --quiet --batch --no-tty --no-options \
266
--enable-dsa2 --homedir \"$RINGDIR\" --trust-model always \
267
--fingerprint --with-colons \
269
--expression='/^fpr:/{s/^fpr:.*:\\([0-9A-Z]*\\):\$/\\1/p;q}'`"
271
test -n "$FINGERPRINT"
273
FILECOMMENT="Encrypted password for a Mandos client"
275
if [ -n "$PASSFILE" ]; then
279
echo -n "Enter passphrase: " >&2
280
first="$(head --lines=1 | tr --delete '\n')"
281
echo -n -e "\nRepeat passphrase: " >&2
282
second="$(head --lines=1 | tr --delete '\n')"
285
if [ "$first" != "$second" ]; then
286
echo -e "Passphrase mismatch" >&2
291
fi | gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
292
--homedir "$RINGDIR" --trust-model always --armor --encrypt \
293
--sign --recipient "$FINGERPRINT" --comment "$FILECOMMENT" \
295
status="${PIPESTATUS[0]}"
296
if [ "$status" -ne 0 ]; then
303
fingerprint = $FINGERPRINT
306
sed --quiet --expression='
307
/^-----BEGIN PGP MESSAGE-----$/,/^-----END PGP MESSAGE-----$/{
309
# Remove 24-bit Radix-64 checksum
320
# Remove the password file, if any
321
if [ -n "$SECFILE" ]; then
322
shred --remove "$SECFILE"
324
# Remove the key rings
325
shred --remove "$RINGDIR"/sec*
326
rm --recursive --force "$RINGDIR"
added
removed
mandos-keygen
