Created
November 23, 2020 04:04
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###################### | |
# Become a Certificate Authority | |
###################### | |
# Generate private key | |
openssl genrsa -des3 -out myCA.key 2048 | |
# Generate root certificate | |
openssl req -x509 -new -nodes -key myCA.key -sha256 -days 825 -out myCA.pem | |
###################### | |
# Create CA-signed certs | |
###################### | |
NAME=mydomain.com # Use your own domain name | |
# Generate a private key | |
openssl genrsa -out $NAME.key 2048 | |
# Create a certificate-signing request | |
openssl req -new -key $NAME.key -out $NAME.csr | |
# Create a config file for the extensions | |
>$NAME.ext cat <<-EOF | |
authorityKeyIdentifier=keyid,issuer | |
basicConstraints=CA:FALSE | |
keyUsage = digitalSignature, nonRepudiation, keyEncipherment, dataEncipherment | |
subjectAltName = @alt_names | |
[alt_names] | |
DNS.1 = $NAME # Be sure to include the domain name here because Common Name is not so commonly honoured by itself | |
DNS.2 = bar.$NAME # Optionally, add additional domains (I've added a subdomain here) | |
IP.1 = 192.168.0.13 # Optionally, add an IP address (if the connection which you have planned requires it) | |
EOF | |
# Create the signed certificate | |
openssl x509 -req -in $NAME.csr -CA myCA.pem -CAkey myCA.key -CAcreateserial \ | |
-out $NAME.crt -days 825 -sha256 -extfile $NAME.ext |
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