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#!/bin/bash
#
# Copyright (c) 2024, The OpenThread Authors.
# 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.
# 3. Neither the name of the copyright holder nor the
# names of its contributors may be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# 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 HOLDER 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.
#
# Create the certificate of an example CA for TCAT. This single CA creates both the
# TCAT Device certificates, as well as the TCAT Commissioner certificates that
# work for those TCAT Devices.
if [ $# -ne 1 ]; then
echo "Usage: ./create-cert-ca.sh <NameOfCA>"
exit 1
fi
set -eu
# days certificate is valid
((VALIDITY = 20 * 365))
NAME=${1}
# create csr
openssl req -new -key "ca/${NAME}_key.pem" -out "${NAME}.csr" \
-subj "/CN=TCAT Example CA '${NAME}'/O=Example Inc/L=Example City/ST=CA/C=US"
# self-sign csr
mkdir -p output
openssl x509 -set_serial 0x01 -extfile "ext/${NAME}.ext" \
-extensions "${NAME}" -req -in "${NAME}.csr" \
-signkey "ca/${NAME}_key.pem" -out "ca/${NAME}_cert.pem" \
-days "${VALIDITY}" -sha256
# delete temp files
rm -f "${NAME}.csr"
# show result
openssl x509 -text -in "ca/${NAME}_cert.pem"