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#!/bin/sh
# csr.sh: Certificate Signing Request Generator
# Copyright(c) 2005 Evaldo Gardenali <evaldo@gardenali.biz>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# ChangeLog:
# Mon May 23 00:14:37 BRT 2005 - evaldo - Initial Release
# Thu Nov 3 10:11:51 GMT 2005 - chrisc - $HOME removed so that key and csr
# are generated in the current directory
# Wed Nov 16 10:42:42 GMT 2005 - chrisc - Updated to match latest version on
# the CAcert wiki, rev #73
# http://wiki.cacert.org/wiki/VhostTaskForce
# Mon Jan 4 18:37:28 BRST 2010 - rhatto - Support for non-interactive mode
# be safe about permissions
LASTUMASK=`umask`
umask 077
# OpenSSL for HPUX needs a random file
RANDOMFILE="$HOME/.rnd"
# create a config file for openssl
CONFIG=`mktemp -q /tmp/openssl-conf.XXXXXXXX`
if [ ! $? -eq 0 ]; then
echo "Could not create temporary config file. exiting"
exit 1
fi
echo "Private Key and Certificate Signing Request Generator"
echo "This script was designed to suit the request format needed by"
echo "the CAcert Certificate Authority. www.CAcert.org"
echo
HOST="$1"
COMMONNAME="$2"
SAN="$3"
if [ -z "$HOST" ]; then
printf "Short Hostname (ie. imap big_srv www2): "
read HOST
fi
if [ -z "$COMMONNAME" ]; then
printf "FQDN/CommonName (ie. www.example.com) : "
read COMMONNAME
fi
if [ -z "$SAN" ]; then
echo "Type SubjectAltNames for the certificate, one per line. Enter a blank line to finish"
SAN=1 # bogus value to begin the loop
SANAMES="" # sanitize
while [ ! "$SAN" = "" ]; do
printf "SubjectAltName: DNS:"
read SAN
if [ "$SAN" = "" ]; then break; fi # end of input
if [ "$SANAMES" = "" ]; then
SANAMES="DNS:$SAN"
else
SANAMES="$SANAMES,DNS:$SAN"
fi
done
else
SANAMES="DNS:$SAN"
fi
# Config File Generation
cat <<EOF > "$CONFIG"
# -------------- BEGIN custom openssl.cnf -----
HOME = $HOME
EOF
if [ "`uname -s`" = "HP-UX" ]; then
echo " RANDFILE = $RANDOMFILE" >> "$CONFIG"
fi
cat <<EOF >> "$CONFIG"
oid_section = new_oids
[ new_oids ]
[ req ]
default_days = 730 # how long to certify for
default_keyfile = ${HOST}_privatekey.pem
distinguished_name = req_distinguished_name
encrypt_key = no
string_mask = nombstr
EOF
if [ ! "$SANAMES" = "" ]; then
echo "req_extensions = v3_req # Extensions to add to certificate request" >> "$CONFIG"
fi
cat <<EOF >> "$CONFIG"
[ req_distinguished_name ]
commonName = Common Name (eg, YOUR name)
commonName_default = $COMMONNAME
commonName_max = 64
[ v3_req ]
EOF
if [ ! "$SANAMES" = "" ]; then
echo "subjectAltName=$SANAMES" >> "$CONFIG"
fi
echo "# -------------- END custom openssl.cnf -----" >> "$CONFIG"
echo "Running OpenSSL..."
# The first one doesn't work, the second one does:
#openssl req -batch -config "$CONFIG" -newkey rsa -out ${HOST}_csr.pem
openssl req -batch -config "$CONFIG" -newkey rsa:2048 -out "${HOST}_csr.pem"
echo "Copy the following Certificate Request and paste into CAcert website to obtain a Certificate."
echo "When you receive your certificate, you 'should' name it something like ${HOST}_server.pem"
echo
cat ${HOST}_csr.pem
echo
printf "The Certificate request is also available in '%s_csr.pem'\n" "$HOST"
printf "The Private Key is stored in '%s_privatekey.pem'\n" "$HOST"
echo
rm "$CONFIG"
#restore umask
umask "$LASTUMASK"
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