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21
# Contact the authors at <mandos@fukt.bsnet.se>.
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KEYDIR="/etc/keys/mandos"
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KEYNAME="`hostname --fqdn`"
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KEYNAME="`hostname --fqdn 2>/dev/null || hostname`"
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KEYCOMMENT="Mandos client key"
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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 vhd:t:l:n:e:c:x:f \
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--longoptions version,help,dir:,type:,length:,name:,email:,comment:,expire:,force \
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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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--name "$0" -- "$@"`
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basename="`basename $0`"
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Usage: `basename $0` [options]
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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 1024.
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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 EMAIL, --email EMAIL
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-e ADDRESS, --email ADDRESS
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Email address of key. Default is empty.
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-c COMMENT, --comment COMMENT
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-c TEXT, --comment TEXT
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Comment field for key. The default value is
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"Mandos client key".
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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 keys.
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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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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="$2"; shift 2;;
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PUBKEYFILE="$KEYDIR/pubkey.txt"
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# Check for some invalid values
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if [ -d "$KEYDIR" ]; then :; else
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if [ ! -d "$KEYDIR" ]; then
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echo "$KEYDIR not a directory" >&2
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if [ -w "$KEYDIR" ]; then :; else
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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 "$SECKEYFILE" ] || [ -e "$PUBKEYFILE" ]; } \
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&& [ "$FORCE" -eq 0 ]; then
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echo "Refusing to overwrite old key files; use --force" >&2
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# Set lines for GnuPG batch file
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if [ -n "$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: $KEYEMAIL"
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BATCHFILE="`mktemp -t mandos-gpg-batch.XXXXXXXXXX`"
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SECRING="`mktemp -t mandos-gpg-secring.XXXXXXXXXX`"
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PUBRING="`mktemp -t mandos-gpg-pubring.XXXXXXXXXX`"
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if [ ! -r "$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 [ \( -e "$SECKEYFILE" -o -e "$PUBKEYFILE" \) \
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-a "$FORCE" -eq 0 ]; then
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echo "Refusing to overwrite old key files; use --force" >&2
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# Set lines for GnuPG batch file
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if [ -n "$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: $KEYEMAIL"
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# Create temporary gpg batch file
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BATCHFILE="`mktemp -t mandos-keygen-batch.XXXXXXXXXX`"
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if [ "$mode" = password ]; then
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# Create temporary encrypted password file
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SECFILE="`mktemp -t mandos-keygen-secfile.XXXXXXXXXX`"
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# Create temporary key ring directory
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RINGDIR="`mktemp -d -t mandos-keygen-keyrings.XXXXXXXXXX`"
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# Remove temporary files on exit
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rm --force $PUBRING $BATCHFILE; \
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shred --remove $SECRING; \
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test -n \"$SECFILE\" && shred --remove \"$SECFILE\"; \
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shred --remove \"$RINGDIR\"/sec*;
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test -n \"$BATCHFILE\" && rm --force \"$BATCHFILE\"; \
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rm --recursive --force \"$RINGDIR\";
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# Create batch file for GnuPG
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cat >"$BATCHFILE" <<EOF
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Key-Length: $KEYLENGTH
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#Key-Usage: encrypt,sign,auth
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Subkey-Type: $SUBKEYTYPE
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Subkey-Length: $SUBKEYLENGTH
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#Subkey-Usage: encrypt,sign,auth
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Expire-Date: $KEYEXPIRE
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#Preferences: <string>
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# Generate a new key in the key rings
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gpg --no-random-seed-file --quiet --batch --no-tty \
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--no-default-keyring --no-options --enable-dsa2 \
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--secret-keyring "$SECRING" --keyring "$PUBRING" \
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--gen-key "$BATCHFILE"
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rm --force "$BATCHFILE"
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# Backup any old key files
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if cp --backup=numbered --force "$SECKEYFILE" "$SECKEYFILE" \
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shred --remove "$SECKEYFILE"
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if cp --backup=numbered --force "$PUBKEYFILE" "$PUBKEYFILE" \
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rm --force "$PUBKEYFILE"
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FILECOMMENT="Mandos client key for $KEYNAME"
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if [ "$KEYCOMMENT" != "$KEYCOMMENT_ORIG" ]; then
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FILECOMMENT="$FILECOMMENT ($KEYCOMMENT)"
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if [ -n "$KEYEMAIL" ]; then
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FILECOMMENT="$FILECOMMENT <$KEYEMAIL>"
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# Export keys from key rings to key files
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gpg --no-random-seed-file --quiet --batch --no-tty --armor \
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--no-default-keyring --no-options --enable-dsa2 \
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--secret-keyring "$SECRING" --keyring "$PUBRING" \
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--export-options export-minimal --comment "$FILECOMMENT" \
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--output "$SECKEYFILE" --export-secret-keys
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gpg --no-random-seed-file --quiet --batch --no-tty --armor \
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--no-default-keyring --no-options --enable-dsa2 \
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--secret-keyring "$SECRING" --keyring "$PUBRING" \
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--export-options export-minimal --comment "$FILECOMMENT" \
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--output "$PUBKEYFILE" --export
200
if [ "$mode" = keygen ]; then
201
# Create batch file for GnuPG
202
cat >"$BATCHFILE" <<-EOF
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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: $KEYEXPIRE
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#Preferences: <string>
215
#%pubring pubring.gpg
216
#%secring secring.gpg
220
# Generate a new key in the key rings
221
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
222
--homedir "$RINGDIR" --trust-model always \
223
--gen-key "$BATCHFILE"
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rm --force "$BATCHFILE"
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# Backup any old key files
227
if cp --backup=numbered --force "$SECKEYFILE" "$SECKEYFILE" \
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shred --remove "$SECKEYFILE"
231
if cp --backup=numbered --force "$PUBKEYFILE" "$PUBKEYFILE" \
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rm --force "$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 "$SECKEYFILE" \
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gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
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--homedir "$RINGDIR" --armor --export-options export-minimal \
252
--comment "$FILECOMMENT" --output "$PUBKEYFILE" --export
255
if [ "$mode" = password ]; then
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# Import key into temporary key rings
257
gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
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--homedir "$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
287
touch "$RINGDIR"/mismatch
291
fi | gpg --quiet --batch --no-tty --no-options --enable-dsa2 \
292
--homedir "$RINGDIR" --trust-model always --armor --encrypt \
293
--sign --recipient "$FINGERPRINT" --comment "$FILECOMMENT" \
295
if [ -e "$RINGDIR"/mismatch ]; then
296
rm --force "$RINGDIR"/mismatch
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 "$SECFILE"
221
324
# Remove the key rings
222
shred --remove "$SECRING"
223
rm --force "$PUBRING"
325
shred --remove "$RINGDIR"/sec*
326
rm --recursive --force "$RINGDIR"