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#! /bin/sh
while getopts n:h:u:g:o:e:y:bf c
do
case $c in
u) USER=$OPTARG;;
g) GROUP=$OPTARG;;
o) OUT=$OPTARG;;
b) BATCH=1;;
f) FORCE=1;;
h) FQDN=$OPTARG;;
e) ENTITYID=$OPTARG;;
y) YEARS=$OPTARG;;
n) PREFIX=$OPTARG;;
\?) echo "keygen [-o output directory (default .)] [-u username to own keypair] [-g owning groupname] [-h hostname for cert] [-y years to issue cert] [-e entityID to embed in cert] [-n filename prefix (default 'sp')]"
exit 1;;
esac
done
if [ -z "$OUT" ] ; then
OUT=.
fi
if [ -z "$PREFIX" ]; then
PREFIX="sp"
fi
if [ -n "$FORCE" ] ; then
rm $OUT/${PREFIX}-key.pem $OUT/${PREFIX}-cert.pem
fi
if [ -s $OUT/${PREFIX}-key.pem -o -s $OUT/${PREFIX}-cert.pem ] ; then
if [ -z "$BATCH" ] ; then
echo The files $OUT/${PREFIX}-key.pem and/or $OUT/${PREFIX}-cert.pem already exist!
echo Use -f option to force recreation of keypair.
exit 2
fi
exit 0
fi
if [ -z "$FQDN" ] ; then
FQDN=`hostname`
fi
if [ -z "$YEARS" ] ; then
YEARS=10
fi
DAYS=`expr $YEARS \* 365`
if [ -z "$ENTITYID" ] ; then
ALTNAME=DNS:$FQDN
else
ALTNAME=DNS:$FQDN,URI:$ENTITYID
fi
SSLCNF=$OUT/${PREFIX}-cert.cnf
cat >$SSLCNF <<EOF
# OpenSSL configuration file for creating keypair
[req]
prompt=no
default_bits=3072
encrypt_key=no
default_md=sha256
distinguished_name=dn
# PrintableStrings only
string_mask=MASK:0002
x509_extensions=ext
[dn]
CN=$FQDN
[ext]
subjectAltName=$ALTNAME
subjectKeyIdentifier=hash
EOF
touch $OUT/${PREFIX}-key.pem
chmod 600 $OUT/${PREFIX}-key.pem
if [ -z "$BATCH" ] ; then
openssl req -config $SSLCNF -new -x509 -days $DAYS -keyout $OUT/${PREFIX}-key.pem -out $OUT/${PREFIX}-cert.pem
else
openssl req -config $SSLCNF -new -x509 -days $DAYS -keyout $OUT/${PREFIX}-key.pem -out $OUT/${PREFIX}-cert.pem 2> /dev/null
fi
rm $SSLCNF
if [ -s $OUT/${PREFIX}-key.pem -a -n "$USER" ] ; then
chown $USER $OUT/${PREFIX}-key.pem $OUT/${PREFIX}-cert.pem
fi
if [ -s $OUT/${PREFIX}-key.pem -a -n "$GROUP" ] ; then
chgrp $GROUP $OUT/${PREFIX}-key.pem $OUT/${PREFIX}-cert.pem
fi
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