21
20
# Contact the authors at <mandos@fukt.bsnet.se>.
26
KEYDIR="/etc/keys/mandos"
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KEYNAME="`hostname --fqdn 2>/dev/null || hostname`"
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KEYNAME="`hostname --fqdn`"
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28
KEYCOMMENT="Mandos client key"
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31
KEYCOMMENT_ORIG="$KEYCOMMENT"
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if [ ! -d "$KEYDIR" ]; then
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KEYDIR="/etc/mandos/keys"
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TEMP=`getopt --options vhpF:d:t:l:s:L:n:e:c:x:f \
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--longoptions version,help,password,passfile:,dir:,type:,length:,subtype:,sublength:,name:,email:,comment:,expire:,force \
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TEMP=`getopt --options d:t:l:n:e:c:x:f \
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--longoptions dir:,type:,length:,name:,email:,comment:,expire:,force \
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36
--name "$0" -- "$@"`
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basename="`basename $0`"
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Usage: $basename [ -v | --version ]
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$basename [ -h | --help ]
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Encrypted password creation:
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$basename { -p | --password } [ --name NAME ] [ --dir DIR]
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$basename { -F | --passfile } FILE [ --name NAME ] [ --dir DIR]
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-v, --version Show program's version number and exit
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-h, --help Show this help message and exit
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-d DIR, --dir DIR Target directory for key files
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-t TYPE, --type TYPE Key type. Default is DSA.
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-l BITS, --length BITS
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Key length in bits. Default is 2048.
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-s TYPE, --subtype TYPE
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Subkey type. Default is ELG-E.
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-L BITS, --sublength BITS
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Subkey length in bits. Default is 2048.
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-n NAME, --name NAME Name of key. Default is the FQDN.
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-e ADDRESS, --email ADDRESS
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Email address of key. Default is empty.
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-c TEXT, --comment TEXT
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Comment field for key. The default value is
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-x TIME, --expire TIME
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Key expire time. Default is no expiration.
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See gpg(1) for syntax.
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-f, --force Force overwriting old key files.
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Password creation options:
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-p, --password Create an encrypted password using the key in
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the key directory. All options other than
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--dir and --name are ignored.
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-F FILE, --passfile FILE
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Encrypt a password from FILE using the key in
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the key directory. All options other than
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--dir and --name are ignored.
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38
eval set -- "$TEMP"
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-p|--password) mode=password; shift;;
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-F|--passfile) mode=password; PASSFILE="$2"; shift 2;;
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-d|--dir) KEYDIR="$2"; shift 2;;
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-t|--type) KEYTYPE="$2"; shift 2;;
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-s|--subtype) SUBKEYTYPE="$2"; shift 2;;
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-l|--length) KEYLENGTH="$2"; shift 2;;
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-L|--sublength) SUBKEYLENGTH="$2"; shift 2;;
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-n|--name) KEYNAME="$2"; shift 2;;
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-e|--email) KEYEMAIL="$2"; shift 2;;
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-c|--comment) KEYCOMMENT="$2"; shift 2;;
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-x|--expire) KEYEXPIRE="$2"; shift 2;;
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-x|--expire) KEYCOMMENT="$2"; shift 2;;
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-f|--force) FORCE=yes; shift;;
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-v|--version) echo "$0 $VERSION"; exit;;
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-h|--help) help; exit;;
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--) shift; break;;
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*) echo "Internal error" >&2; exit 1;;
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PUBKEYFILE="$KEYDIR/pubkey.txt"
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# Check for some invalid values
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if [ ! -d "$KEYDIR" ]; then
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if [ -d "$KEYDIR" ]; then :; else
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echo "$KEYDIR not a directory" >&2
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if [ ! -r "$KEYDIR" ]; then
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echo "Directory $KEYDIR not readable" >&2
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if [ "$mode" = keygen ]; then
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if [ ! -w "$KEYDIR" ]; then
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echo "Directory $KEYDIR not writeable" >&2
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if [ -z "$KEYTYPE" ]; then
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echo "Empty key type" >&2
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if [ -z "$KEYNAME" ]; then
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echo "Empty key name" >&2
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if [ -z "$KEYLENGTH" ] || [ "$KEYLENGTH" -lt 512 ]; then
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echo "Invalid key length" >&2
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if [ -z "$KEYEXPIRE" ]; then
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echo "Empty key expiration" >&2
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# Make FORCE be 0 or 1
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[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]) FORCE=1;;
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[Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|*) FORCE=0;;
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if [ \( -e "$SECKEYFILE" -o -e "$PUBKEYFILE" \) \
163
-a "$FORCE" -eq 0 ]; then
164
echo "Refusing to overwrite old key files; use --force" >&2
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# Set lines for GnuPG batch file
169
if [ -n "$KEYCOMMENT" ]; then
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KEYCOMMENTLINE="Name-Comment: $KEYCOMMENT"
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if [ -n "$KEYEMAIL" ]; then
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KEYEMAILLINE="Name-Email: $KEYEMAIL"
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# Create temporary gpg batch file
177
BATCHFILE="`mktemp -t mandos-keygen-batch.XXXXXXXXXX`"
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if [ "$mode" = password ]; then
181
# Create temporary encrypted password file
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SECFILE="`mktemp -t mandos-keygen-secfile.XXXXXXXXXX`"
185
# Create temporary key ring directory
186
RINGDIR="`mktemp -d -t mandos-keygen-keyrings.XXXXXXXXXX`"
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# Remove temporary files on exit
191
test -n \"$SECFILE\" && shred --remove \"$SECFILE\"; \
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shred --remove \"$RINGDIR\"/sec*;
193
test -n \"$BATCHFILE\" && rm --force \"$BATCHFILE\"; \
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rm --recursive --force \"$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
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Subkey-Type: $SUBKEYTYPE
207
Subkey-Length: $SUBKEYLENGTH
208
#Subkey-Usage: encrypt,sign,auth
212
Expire-Date: $KEYEXPIRE
213
#Preferences: <string>
215
#%pubring pubring.gpg
216
#%secring secring.gpg
222
Note: Due to entropy requirements, key generation could take
223
anything from a few minutes to SEVERAL HOURS. Please be
224
patient and/or supply the system with more entropy if needed.
230
# Generate a new key in the key rings
231
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
232
--homedir "$RINGDIR" --trust-model always \
233
--gen-key "$BATCHFILE"
234
rm --force "$BATCHFILE"
241
# Backup any old key files
242
if cp --backup=numbered --force "$SECKEYFILE" "$SECKEYFILE" \
244
shred --remove "$SECKEYFILE"
246
if cp --backup=numbered --force "$PUBKEYFILE" "$PUBKEYFILE" \
248
rm --force "$PUBKEYFILE"
251
FILECOMMENT="Mandos client key for $KEYNAME"
252
if [ "$KEYCOMMENT" != "$KEYCOMMENT_ORIG" ]; then
253
FILECOMMENT="$FILECOMMENT ($KEYCOMMENT)"
256
if [ -n "$KEYEMAIL" ]; then
257
FILECOMMENT="$FILECOMMENT <$KEYEMAIL>"
260
# Export key from key rings to key files
261
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
262
--homedir "$RINGDIR" --armor --export-options export-minimal \
263
--comment "$FILECOMMENT" --output "$SECKEYFILE" \
265
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
266
--homedir "$RINGDIR" --armor --export-options export-minimal \
267
--comment "$FILECOMMENT" --output "$PUBKEYFILE" --export
270
if [ "$mode" = password ]; then
271
# Import key into temporary key rings
272
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
273
--homedir "$RINGDIR" --trust-model always --armor \
274
--import "$SECKEYFILE"
275
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
276
--homedir "$RINGDIR" --trust-model always --armor \
277
--import "$PUBKEYFILE"
279
# Get fingerprint of key
280
FINGERPRINT="`gpg --quiet --batch --no-tty --no-options \
281
--enable-dsa2 --homedir \"$RINGDIR\" --trust-model always \
282
--fingerprint --with-colons \
284
--expression='/^fpr:/{s/^fpr:.*:\\([0-9A-Z]*\\):\$/\\1/p;q}'`"
286
test -n "$FINGERPRINT"
288
FILECOMMENT="Encrypted password for a Mandos client"
290
if [ -n "$PASSFILE" ]; then
294
echo -n "Enter passphrase: " >&2
295
first="$(head --lines=1 | tr --delete '\n')"
296
echo -n -e "\nRepeat passphrase: " >&2
297
second="$(head --lines=1 | tr --delete '\n')"
300
if [ "$first" != "$second" ]; then
301
echo -e "Passphrase mismatch" >&2
302
touch "$RINGDIR"/mismatch
306
fi | gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
307
--homedir "$RINGDIR" --trust-model always --armor --encrypt \
308
--sign --recipient "$FINGERPRINT" --comment "$FILECOMMENT" \
310
if [ -e "$RINGDIR"/mismatch ]; then
311
rm --force "$RINGDIR"/mismatch
318
fingerprint = $FINGERPRINT
321
sed --quiet --expression='
322
/^-----BEGIN PGP MESSAGE-----$/,/^-----END PGP MESSAGE-----$/{
324
# Remove 24-bit Radix-64 checksum
335
# Remove the password file, if any
336
if [ -n "$SECFILE" ]; then
337
shred --remove "$SECFILE"
339
# Remove the key rings
340
shred --remove "$RINGDIR"/sec*
341
rm --recursive --force "$RINGDIR"
66
if [ -w "$KEYDIR" ]; then :; else
67
echo "Directory $KEYDIR not writeable" >&2
71
if [ -z "$KEYTYPE" ]; then
72
echo "Empty key type" >&2
76
if [ -z "$KEYNAME" ]; then
77
echo "Empty key name" >&2
81
if [ -z "$KEYLENGTH" ] || [ "$KEYLENGTH" -lt 512 ]; then
82
echo "Invalid key length" >&2
86
if [ -z "$KEYEXPIRE" ]; then
87
echo "Empty key expiration" >&2
91
# Make FORCE be 0 or 1
93
[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]) FORCE=1;;
94
[Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|*) FORCE=0;;
97
if { [ -e "$SECKEYFILE" ] || [ -e "$PUBKEYFILE" ]; } \
98
&& [ "$FORCE" -eq 0 ]; then
99
echo "Refusing to overwrite old key files; use --force" >&2
103
# Set lines for GPG batch file
104
if [ -n "$KEYCOMMENT" ]; then
105
KEYCOMMENTLINE="Name-Comment: $KEYCOMMENT"
107
if [ -n "$KEYEMAIL" ]; then
108
KEYEMAILLINE="Name-Email: $KEYEMAIL"
112
BATCHFILE="`mktemp -t mandos-gpg-batch.XXXXXXXXXX`"
113
SECRING="`mktemp -t mandos-gpg-secring.XXXXXXXXXX`"
114
PUBRING="`mktemp -t mandos-gpg-pubring.XXXXXXXXXX`"
116
trap "rm --force $PUBRING $BATCHFILE; shred --remove $SECRING" EXIT
118
# Create batch file for GPG
119
cat >"$BATCHFILE" <<EOF
121
Key-Length: $KEYLENGTH
122
#Key-Usage: encrypt,sign,auth
126
Expire-Date: $KEYEXPIRE
133
gpg --no-random-seed-file --quiet --batch --no-tty \
134
--no-default-keyring --batch --secret-keyring "$SECRING" \
135
--keyring "$PUBRING" --gen-key "$BATCHFILE"
136
rm --force "$BATCHFILE"
138
if cp --backup=numbered --force "$SECKEYFILE" "$SECKEYFILE" \
140
shred --remove "$SECKEYFILE"
142
if cp --backup=numbered --force "$PUBKEYFILE" "$PUBKEYFILE" \
144
rm --force "$PUBKEYFILE"
147
FILECOMMENT="Mandos client key for $KEYNAME"
148
if [ "$KEYCOMMENT" != "$KEYCOMMENT_ORIG" ]; then
149
FILECOMMENT="$FILECOMMENT ($KEYCOMMENT)"
152
if [ -n "$KEYEMAIL" ]; then
153
FILECOMMENT="$FILECOMMENT <$KEYEMAIL>"
156
gpg --no-random-seed-file --quiet --batch --no-tty --armor \
157
--no-default-keyring --secret-keyring "$SECRING" \
158
--keyring "$PUBRING" --export-options export-minimal \
159
--comment "$FILECOMMENT" --output "$SECKEYFILE" \
161
gpg --no-random-seed-file --quiet --batch --no-tty --armor \
162
--no-default-keyring --secret-keyring "$SECRING" \
163
--keyring "$PUBRING" --export-options export-minimal \
164
--comment "$FILECOMMENT" --output "$PUBKEYFILE" \