/mandos/release

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/release
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
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
#!/bin/sh -e
# 
# Mandos key generator - create a new OpenPGP key for a Mandos client
# 
# Copyright © 2008-2013 Teddy Hogeborn
# Copyright © 2008-2013 Björn Påhlsson
# 
# 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 3 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/>.
# 
# Contact the authors at <mandos@recompile.se>.
# 

VERSION="1.6.1"

KEYDIR="/etc/keys/mandos"
KEYTYPE=RSA
KEYLENGTH=4096
SUBKEYTYPE=RSA
SUBKEYLENGTH=4096
KEYNAME="`hostname --fqdn 2>/dev/null || hostname`"
KEYEMAIL=""
KEYCOMMENT="Mandos client key"
KEYEXPIRE=0
FORCE=no
KEYCOMMENT_ORIG="$KEYCOMMENT"
mode=keygen

if [ ! -d "$KEYDIR" ]; then
    KEYDIR="/etc/mandos/keys"
fi

# Parse options
TEMP=`getopt --options vhpF:d:t:l:s:L:n:e:c:x:f \
    --longoptions version,help,password,passfile:,dir:,type:,length:,subtype:,sublength:,name:,email:,comment:,expire:,force \
    --name "$0" -- "$@"`

help(){
basename="`basename $0`"
cat <<EOF
Usage: $basename [ -v | --version ]
       $basename [ -h | --help ]
   Key creation:
       $basename [ OPTIONS ]
   Encrypted password creation:
       $basename { -p | --password } [ --name NAME ] [ --dir DIR]
       $basename { -F | --passfile } FILE [ --name NAME ] [ --dir DIR]

Key creation options:
  -v, --version         Show program's version number and exit
  -h, --help            Show this help message and exit
  -d DIR, --dir DIR     Target directory for key files
  -t TYPE, --type TYPE  Key type.  Default is RSA.
  -l BITS, --length BITS
                        Key length in bits.  Default is 4096.
  -s TYPE, --subtype TYPE
                        Subkey type.  Default is RSA.
  -L BITS, --sublength BITS
                        Subkey length in bits.  Default is 4096.
  -n NAME, --name NAME  Name of key.  Default is the FQDN.
  -e ADDRESS, --email ADDRESS
                        Email address of key.  Default is empty.
  -c TEXT, --comment TEXT
                        Comment field for key.  The default value is
                        "Mandos client key".
  -x TIME, --expire TIME
                        Key expire time.  Default is no expiration.
                        See gpg(1) for syntax.
  -f, --force           Force overwriting old key files.

Password creation options:
  -p, --password        Create an encrypted password using the key in
                        the key directory.  All options other than
                        --dir and --name are ignored.
  -F FILE, --passfile FILE
                        Encrypt a password from FILE using the key in
                        the key directory.  All options other than
                        --dir and --name are ignored.
EOF
}

eval set -- "$TEMP"
while :; do
    case "$1" in
	-p|--password) mode=password; shift;;
	-F|--passfile) mode=password; PASSFILE="$2"; shift 2;;
	-d|--dir) KEYDIR="$2"; shift 2;;
	-t|--type) KEYTYPE="$2"; shift 2;;
	-s|--subtype) SUBKEYTYPE="$2"; shift 2;;
	-l|--length) KEYLENGTH="$2"; shift 2;;
	-L|--sublength) SUBKEYLENGTH="$2"; shift 2;;
	-n|--name) KEYNAME="$2"; shift 2;;
	-e|--email) KEYEMAIL="$2"; shift 2;;
	-c|--comment) KEYCOMMENT="$2"; shift 2;;
	-x|--expire) KEYEXPIRE="$2"; shift 2;;
	-f|--force) FORCE=yes; shift;;
	-v|--version) echo "$0 $VERSION"; exit;;
	-h|--help) help; exit;;
	--) shift; break;;
	*) echo "Internal error" >&2; exit 1;;
    esac
done
if [ "$#" -gt 0 ]; then
    echo "Unknown arguments: '$@'" >&2
    exit 1
fi

SECKEYFILE="$KEYDIR/seckey.txt"
PUBKEYFILE="$KEYDIR/pubkey.txt"

# Check for some invalid values
if [ ! -d "$KEYDIR" ]; then
    echo "$KEYDIR not a directory" >&2
    exit 1
fi
if [ ! -r "$KEYDIR" ]; then
    echo "Directory $KEYDIR not readable" >&2
    exit 1
fi

if [ "$mode" = keygen ]; then
    if [ ! -w "$KEYDIR" ]; then
	echo "Directory $KEYDIR not writeable" >&2
	exit 1
    fi
    if [ -z "$KEYTYPE" ]; then
	echo "Empty key type" >&2
	exit 1
    fi
    
    if [ -z "$KEYNAME" ]; then
	echo "Empty key name" >&2
	exit 1
    fi
    
    if [ -z "$KEYLENGTH" ] || [ "$KEYLENGTH" -lt 512 ]; then
	echo "Invalid key length" >&2
	exit 1
    fi
    
    if [ -z "$KEYEXPIRE" ]; then
	echo "Empty key expiration" >&2
	exit 1
    fi
    
    # Make FORCE be 0 or 1
    case "$FORCE" in
	[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]) FORCE=1;;
	[Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|*) FORCE=0;;
    esac
    
    if [ \( -e "$SECKEYFILE" -o -e "$PUBKEYFILE" \) \
	-a "$FORCE" -eq 0 ]; then
	echo "Refusing to overwrite old key files; use --force" >&2
	exit 1
    fi
    
    # Set lines for GnuPG batch file
    if [ -n "$KEYCOMMENT" ]; then
	KEYCOMMENTLINE="Name-Comment: $KEYCOMMENT"
    fi
    if [ -n "$KEYEMAIL" ]; then
	KEYEMAILLINE="Name-Email: $KEYEMAIL"
    fi
    
    # Create temporary gpg batch file
    BATCHFILE="`mktemp -t mandos-keygen-batch.XXXXXXXXXX`"
fi

if [ "$mode" = password ]; then
    # Create temporary encrypted password file
    SECFILE="`mktemp -t mandos-keygen-secfile.XXXXXXXXXX`"
fi

# Create temporary key ring directory
RINGDIR="`mktemp -d -t mandos-keygen-keyrings.XXXXXXXXXX`"

# Remove temporary files on exit
trap "
set +e; \
test -n \"$SECFILE\" && shred --remove \"$SECFILE\"; \
shred --remove \"$RINGDIR\"/sec*;
test -n \"$BATCHFILE\" && rm --force \"$BATCHFILE\"; \
rm --recursive --force \"$RINGDIR\";
tty --quiet && stty echo; \
" EXIT

set -e

umask 077

if [ "$mode" = keygen ]; then
    # Create batch file for GnuPG
    cat >"$BATCHFILE" <<-EOF
	Key-Type: $KEYTYPE
	Key-Length: $KEYLENGTH
	Key-Usage: sign,auth
	Subkey-Type: $SUBKEYTYPE
	Subkey-Length: $SUBKEYLENGTH
	Subkey-Usage: encrypt
	Name-Real: $KEYNAME
	$KEYCOMMENTLINE
	$KEYEMAILLINE
	Expire-Date: $KEYEXPIRE
	#Preferences: <string>
	#Handle: <no-spaces>
	#%pubring pubring.gpg
	#%secring secring.gpg
	%commit
	EOF
    
    if tty --quiet; then
	cat <<-EOF
	Note: Due to entropy requirements, key generation could take
	anything from a few minutes to SEVERAL HOURS.  Please be
	patient and/or supply the system with more entropy if needed.
	EOF
	echo -n "Started: "
	date
    fi
    
    # Generate a new key in the key rings
    gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
	--homedir "$RINGDIR" --trust-model always \
	--gen-key "$BATCHFILE"
    rm --force "$BATCHFILE"
    
    if tty --quiet; then
	echo -n "Finished: "
	date
    fi
    
    # Backup any old key files
    if cp --backup=numbered --force "$SECKEYFILE" "$SECKEYFILE" \
	2>/dev/null; then
	shred --remove "$SECKEYFILE"
    fi
    if cp --backup=numbered --force "$PUBKEYFILE" "$PUBKEYFILE" \
	2>/dev/null; then
	rm --force "$PUBKEYFILE"
    fi
    
    FILECOMMENT="Mandos client key for $KEYNAME"
    if [ "$KEYCOMMENT" != "$KEYCOMMENT_ORIG" ]; then
	FILECOMMENT="$FILECOMMENT ($KEYCOMMENT)"
    fi
    
    if [ -n "$KEYEMAIL" ]; then
	FILECOMMENT="$FILECOMMENT <$KEYEMAIL>"
    fi
    
    # Export key from key rings to key files
    gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
	--homedir "$RINGDIR" --armor --export-options export-minimal \
	--comment "$FILECOMMENT" --output "$SECKEYFILE" \
	--export-secret-keys
    gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
	--homedir "$RINGDIR" --armor --export-options export-minimal \
	--comment "$FILECOMMENT" --output "$PUBKEYFILE" --export
fi

if [ "$mode" = password ]; then
    # Import key into temporary key rings
    gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
	--homedir "$RINGDIR" --trust-model always --armor \
	--import "$SECKEYFILE"
    gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
	--homedir "$RINGDIR" --trust-model always --armor \
	--import "$PUBKEYFILE"
    
    # Get fingerprint of key
    FINGERPRINT="`gpg --quiet --batch --no-tty --no-options \
	--enable-dsa2 --homedir \"$RINGDIR\" --trust-model always \
	--fingerprint --with-colons \
	| sed --quiet \
	--expression='/^fpr:/{s/^fpr:.*:\\([0-9A-Z]*\\):\$/\\1/p;q}'`"
    
    test -n "$FINGERPRINT"
    
    FILECOMMENT="Encrypted password for a Mandos client"
    
    while [ ! -s "$SECFILE" ]; do
	if [ -n "$PASSFILE" ]; then
	    cat "$PASSFILE"
	else
	    tty --quiet && stty -echo
	    echo -n "Enter passphrase: "
	    read first
	    tty --quiet && echo >&2
	    echo -n "Repeat passphrase: "
	    read second
	    if tty --quiet; then
		echo >&2
		stty echo
	    fi
	    if [ "$first" != "$second" ]; then
		echo "Passphrase mismatch" >&2
		touch "$RINGDIR"/mismatch
	    else
		echo -n "$first"
	    fi
	fi | gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
	    --homedir "$RINGDIR" --trust-model always --armor \
	    --encrypt --sign --recipient "$FINGERPRINT" --comment \
	    "$FILECOMMENT" > "$SECFILE"
	if [ -e "$RINGDIR"/mismatch ]; then
	    rm --force "$RINGDIR"/mismatch
	    if tty --quiet; then
		> "$SECFILE"
	    else
		exit 1
	    fi
	fi
    done
    
    cat <<-EOF
	[$KEYNAME]
	host = $KEYNAME
	fingerprint = $FINGERPRINT
	secret =
	EOF
    sed --quiet --expression='
	/^-----BEGIN PGP MESSAGE-----$/,/^-----END PGP MESSAGE-----$/{
	    /^$/,${
		# Remove 24-bit Radix-64 checksum
		s/=....$//
		# Indent four spaces
		/^[^-]/s/^/    /p
	    }
	}' < "$SECFILE"
fi

trap - EXIT

set +e
# Remove the password file, if any
if [ -n "$SECFILE" ]; then
    shred --remove "$SECFILE"
fi
# Remove the key rings
shred --remove "$RINGDIR"/sec*
rm --recursive --force "$RINGDIR"