solo1/tools/gencert/gen_intermediate.sh

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#!/bin/bash
#
# Copyright (C) 2018 SoloKeys, Inc. <https://solokeys.com/>
#
# This file is part of Solo.
#
# Solo is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Solo is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Solo. If not, see <https://www.gnu.org/licenses/>
#
# This code is available under licenses for commercial use.
# Please contact SoloKeys for more information.
#
keyname=interkey.pem
certname=intercert.pem
smallcertname=intercert.der
curve=prime256v1
[[ "$#" != 2 ]] && echo "usage: $0 <signing-key> <root-ca>" && exit 1
# generate EC private key
openssl ecparam -genkey -name "$curve" -out "$keyname" -rand seed.txt
# generate a "signing request"
openssl req -new -key "$keyname" -out "$keyname".csr -subj "/C=US/ST=Maryland/O=SOLO HACKER/OU=Authenticator Attestation/CN=solokeys.com/emailAddress=hello@solokeys.com"
# sign the request
openssl x509 -req -days 18250 -in "$keyname".csr -extfile v3.ext -CA "$2" -CAkey "$1" -set_serial 01 -out "$certname" -sha256
# convert to smaller size format DER
openssl x509 -in $certname -outform der -out $smallcertname
openssl x509 -in $certname -text -noout