openssl生成CA证书的三个脚本

1.生成自签证书

#!/bin/sh
#
# Copied from ima-evm-utils.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# version 2 as published by the Free Software Foundation.
#
# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.

GENKEY=ima.genkey

cat << __EOF__ >$GENKEY
[ req ]
default_bits = 2048
distinguished_name = req_distinguished_name
prompt = no
string_mask = utf8only
x509_extensions = myexts

[ req_distinguished_name ]
O = example.com
CN = meta-intel-iot-security example signing key
emailAddress = john.doe@example.com

[ myexts ]
basicConstraints=critical,CA:FALSE
keyUsage=digitalSignature
subjectKeyIdentifier=hash
authorityKeyIdentifier=keyid
__EOF__

openssl req -new -nodes -utf8 -sha256 -days 36500 -batch \
        -x509 -config $GENKEY \
    -outform DER -out x509_ima.der -keyout privkey_ima.pem

2.生成CA根证书

#!/bin/sh
#
# Copied from ima-evm-utils.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# version 2 as published by the Free Software Foundation.
#
# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.

GENKEY=ima-local-ca.genkey

cat << __EOF__ >$GENKEY
[ req ]
default_bits = 2048
distinguished_name = req_distinguished_name
prompt = no
string_mask = utf8only
x509_extensions = v3_ca

[ req_distinguished_name ]
O = example.com
CN = meta-intel-iot-security example certificate signing key
emailAddress = john.doe@example.com

[ v3_ca ]
basicConstraints=CA:TRUE
subjectKeyIdentifier=hash
authorityKeyIdentifier=keyid:always,issuer
# keyUsage = cRLSign, keyCertSign
__EOF__

openssl req -new -x509 -utf8 -sha256 -days 3650 -batch -config $GENKEY \
        -outform DER -out ima-local-ca.x509 -keyout ima-local-ca.priv

openssl x509 -inform DER -in ima-local-ca.x509 -out ima-local-ca.pem

3.使用根证书签发子证书

#!/bin/sh
#
# Copied from ima-evm-utils.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# version 2 as published by the Free Software Foundation.
#
# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.

GENKEY=ima.genkey
CA=${1:-ima-local-ca.pem}
CAKEY=${2:-ima-local-ca.priv}

cat << __EOF__ >$GENKEY
[ req ]
default_bits = 2048 
distinguished_name = req_distinguished_name
prompt = no
string_mask = utf8only
x509_extensions = v3_usr

[ req_distinguished_name ]
O = example.com
CN = meta-intel-iot-security example signing key
emailAddress = john.doe@example.com

[ v3_usr ]
basicConstraints=critical,CA:FALSE
#basicConstraints=CA:FALSE
keyUsage=digitalSignature
#keyUsage = nonRepudiation, digitalSignature, keyEncipherment
subjectKeyIdentifier=hash
authorityKeyIdentifier=keyid
#authorityKeyIdentifier=keyid,issuer
__EOF__

openssl req -new -nodes -utf8 -sha256 -days 365 -batch -config $GENKEY \
        -out csr_ima.pem -keyout privkey_ima.pem
openssl x509 -req -in csr_ima.pem -days 365 -extfile $GENKEY -extensions v3_usr \
        -CA $CA -CAkey $CAKEY -CAcreateserial \
        -outform DER -out x509_ima.der

标签：ima,证书,x509,CA,req,openssl,Public,program,GENKEY
来源： https://www.cnblogs.com/real-bert/p/16179384.html