openssl genrsa -out ca.key 4096
openssl req -x509 -new -nodes -sha512 -days 3650 -subj "/C=CN/ST=Beijing/L=Beijing/O=example/OU=Personal/CN=dke.com" -key ca.key -out ca.crt
openssl genrsa -out reg.dke.com.key 4096
openssl req -sha512 -new -subj "/C=CN/ST=Beijing/L=Beijing/O=example/OU=Personal/CN=dke.com" -key reg.dke.com.key -out reg.dke.com.csr
cat > v3.ext <<-EOF
authorityKeyIdentifier=keyid,issuer
basicConstraints=CA:FALSE
keyUsage = digitalSignature, nonRepudiation, keyEncipherment, dataEncipherment
extendedKeyUsage = serverAuth
subjectAltName = @alt_names
[alt_names]
DNS.1=dke.com
DNS.2=dke
DNS.3=hostname
EOF
openssl x509 -req -sha512 -days 3650 -extfile v3.ext -CA ca.crt -CAkey ca.key -CAcreateserial -in reg.dke.com.csr -out reg.dke.com.crt
