#!/bin/bash

# Copyright 2001-2004 The Apache Software Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

# $Header$
#
# gencert - generate new CA, server and user certificates for NSS testing.
#

CERTUTIL=/usr/bin/certutil

# Note: In order for the client tests that ship with this module to work
# properly with this test certificate you need to ensure that the domain of
# the server is the same as your domain. Otherwise you will get an error message
# like -12776 (requested domain name does not match the server's certificate).

getFQDN() {
        max=0
        maxhost=
        OS=`uname -s`
        if [ $OS == "SunOS" ]; then
                if [ -x /usr/lib/mail/sh/check-hostname ]; then
                        maxhost=`/usr/lib/mail/sh/check-hostname | awk 'BEGIN { FS=" " } { if ($3 == "OK:") { print $7 } }'`
                fi
                echo $maxhost
                return
        fi
        defhost=`hostname` 
        if [ -e /usr/bin/host -o -e /bin/host ]; then
            hosthost=`host $defhost | grep -v "not found" | awk '{print $1}'`
        else
            hosthost=''
        fi
        for host in $defhost $hosthost `hostname -f` `hostname -a` ; do
                len=`echo $host | wc -c` 
                if [ $len -gt $max ]; then
                        max=$len 
                        maxhost=$host
                fi
        done
        echo $maxhost
}

FQDN=`getFQDN`
if [ "x${FQDN}" = "x" ]; then
   FQDN=localhost.localdomain
fi

CA_CERTDN="CN=Certificate Shack, O=example.com, C=US"
SERVER_CERTDN="CN=${FQDN}, O=example.com, C=US"
ALPHA_CERTDN="E=alpha@${FQDN}, CN=Frank Alpha, UID=alpha, OU=People, O=example.com, C=US"
BETA_CERTDN="E=beta@${FQDN}, CN=Anna Beta, UID=beta, OU=People, O=example.com, C=US"
COLON_CERTDN="E=colon:user@${FQDN}, CN=Colon User, UID=colon, OU=People, O=example.com, C=US"

# size of the keys
KEYSIZE=2048

# validity of the certs in months
VALIDITY=48

# starting point of serial numbers. 1 is the CA, 2 is the client cert "alpha"
# 3 is the server cert "Server-Cert".
CERTSERIAL=0

if [ $# -lt 1 ]
then
    echo "usage: $0 <destdir>" 1>&2
    exit 1
fi
DEST=`echo $1 | cut -d: -f2`
if [ ! -d $DEST -o ! -w $DEST ]
then
    echo "ERROR: $1 must be writable directory." 1>&2
    exit 1
fi

DBDIR=$1
shift

TEST=0
SNI=0

while [[ $# -ge 1 ]]
do
    key="$1"
    case $key in
        -s|--sni)
            SNI="$2"
            shift
            ;;
        -t|--test)
            TEST=1
            ;;
        *)
            echo "Unknown option $1"
            exit 1
            ;;
    esac
    shift
done

echo "TEST = $TEST"
echo "SNI = $SNI"

echo -e "\n" > $DEST/pw.txt

function generate_server_sni_cert {
    hostname=$1

    local SERVER_DN="CN=${hostname}, O=SNI, O=example.com, C=US"
    local NICKNAME="Server-Cert-${hostname}"

    echo ""
    echo "#####################################################################"
    echo "Generating $NICKNAME server certificate request"
    echo "#####################################################################"
    if [ -e /dev/urandom ]; then
        (ps -elf; date; dd if=/dev/urandom count=1 bs=1024 2>/dev/null| tr -dc 'a-zA-Z0-9') > $DEST/noise
    else
        (ps -elf; date; dd if=/dev/random count=1 bs=128 2>/dev/null| tr -dc 'a-zA-Z0-9') > $DEST/noise
    fi
    $CERTUTIL -R -d $DBDIR \
                -s "$SERVER_DN" \
                -o $DEST/tmpcertreq \
                -g $KEYSIZE \
                -z $DEST/noise \
                -f $DEST/pw.txt

    echo ""
    echo "#####################################################################"
    echo "Generating $NICKNAME server certificate"
    echo "#####################################################################"
    let CERTSERIAL=CERTSERIAL+1
    echo -e "2\n9\nn\n1\n9\nn\n" | \
    $CERTUTIL -C -d $DBDIR \
                -c cacert \
                -i $DEST/tmpcertreq \
                -o $DEST/tmpcert.der \
                -m $CERTSERIAL \
                -v $VALIDITY \
                -f $DEST/pw.txt \
                -1 \
                -5 \
                -8 $hostname

    rm $DEST/tmpcertreq

    echo ""
    echo "#####################################################################"
    echo "Importing $NICKNAME certificate into server cert DB"
    echo "#####################################################################"
    $CERTUTIL -A -d $DBDIR -n $NICKNAME \
                -t u,u,u \
                -i $DEST/tmpcert.der \
                -f $DEST/pw.txt
 
    rm $DEST/tmpcert.der
}

echo ""
echo "#####################################################################"
echo "Generating new server certificate and key database."
echo "#####################################################################"
$CERTUTIL -N -d $DBDIR -f $DEST/pw.txt

echo ""
echo "#####################################################################"
echo "Generating self-signed client CA certificate"
echo "#####################################################################"
(ps -elf; date; netstat -a) > $DEST/noise
let CERTSERIAL=CERTSERIAL+1
# 5 9 n  -> Cert signing key
# y 10 y  -> basic constraints: CA cert
# 5 6 7 9 n  -> SSL, S/MIME, Object signing CA
echo -e "5\n9\nn\ny\n10\ny\n5\n6\n7\n9\nn\n" | \
$CERTUTIL -S -d $DBDIR -n cacert \
            -s "$CA_CERTDN" \
            -x \
            -t CTu,CTu,CTu \
            -g $KEYSIZE \
            -m $CERTSERIAL \
            -v $VALIDITY \
            -f $DEST/pw.txt \
            -z $DEST/noise \
            -2 \
            -1 \

echo ""
echo "#####################################################################"
echo "Generating user certificate for \"alpha\"."
echo "#####################################################################"
(ps -elf; date; netstat -a) > $DEST/noise
let CERTSERIAL=CERTSERIAL+1
# 0 2 9 n  -> Key usage: Key Encipherment, Digital Signature
# 0 9 n  -> SSL Client
echo -e "0\n2\n9\nn\n0\n9\nn\n" | \
$CERTUTIL -S -d $DBDIR -n alpha \
            -s "$ALPHA_CERTDN" \
            -c cacert \
            -t u,pu,u \
            -g $KEYSIZE \
            -m $CERTSERIAL \
            -v $VALIDITY \
            -f $DEST/pw.txt \
            -z $DEST/noise \
            -1 \
            -5 \
            -7 alpha@${FQDN}

echo ""
echo "#####################################################################"
echo "Generating user certificate for \"beta\"."
echo "#####################################################################"
(ps -elf; date; netstat -a) > $DEST/noise
let CERTSERIAL=CERTSERIAL+1
# 0 2 9 n  -> Key usage: Key Encipherment, Digital Signature
# 0 9 n  -> SSL Client
echo -e "0\n2\n9\nn\n0\n9\nn\n" | \
$CERTUTIL -S -d $DBDIR -n beta \
            -s "$BETA_CERTDN" \
            -c cacert \
            -t u,pu,u \
            -g $KEYSIZE \
            -m $CERTSERIAL \
            -v $VALIDITY \
            -f $DEST/pw.txt \
            -z $DEST/noise \
            -1 \
            -5 \
            -7 beta@${FQDN}

if [ $TEST == 1 ]; then
echo ""
echo "#####################################################################"
echo "Generating user certificate for \"colon\"."
echo "#####################################################################"
(ps -elf; date; netstat -a) > $DEST/noise
let CERTSERIAL=CERTSERIAL+1
# 0 2 9 n  -> Key usage: Key Encipherment, Digital Signature
# 0 9 n  -> SSL Client
echo -e "0\n2\n9\nn\n0\n9\nn\n" | \
$CERTUTIL -S -d $DBDIR -n colon \
            -s "$COLON_CERTDN" \
            -c cacert \
            -t u,pu,u \
            -g $KEYSIZE \
            -m $CERTSERIAL \
            -v $VALIDITY \
            -f $DEST/pw.txt \
            -z $DEST/noise \
            -1 \
            -5
fi

echo ""
echo "#####################################################################"
echo "Generating server certificate request"

echo ""
echo "#####################################################################"
echo "Generating server certificate request"
echo "#####################################################################"
(ps -elf; date; netstat -a) > $DEST/noise
$CERTUTIL -R -d $DBDIR \
            -s "$SERVER_CERTDN" \
            -o $DEST/tmpcertreq \
            -g $KEYSIZE \
            -z $DEST/noise \
            -f $DEST/pw.txt

echo ""
echo "#####################################################################"
echo "Generating server certificate"
echo "#####################################################################"
let CERTSERIAL=CERTSERIAL+1
echo -e "2\n9\nn\n1\n9\nn\n" | \
$CERTUTIL -C -d $DBDIR \
            -c cacert \
            -i $DEST/tmpcertreq \
            -o $DEST/tmpcert.der \
            -m $CERTSERIAL \
            -v $VALIDITY \
            -f $DEST/pw.txt \
            -1 \
            -5 \
            -8 $FQDN

rm $DEST/tmpcertreq

echo ""
echo "#####################################################################"
echo "Importing server certificate into server cert DB"
echo "#####################################################################"
$CERTUTIL -A -d $DBDIR -n Server-Cert \
            -t u,u,u \
            -i $DEST/tmpcert.der \
            -f $DEST/pw.txt

rm $DEST/tmpcert.der

if [ $SNI -gt 0 ]; then
    SNI=`expr $SNI + 1`
    count=1
    while test $count -lt $SNI ; do
        generate_server_sni_cert www$count.example.com
        count=`expr $count + 1`
    done
fi

echo ""
echo "#####################################################################"
echo "Cleaning up"
echo "#####################################################################"
rm $DEST/pw.txt
rm $DEST/noise

exit 0
