自签名证书生成

新建一个文件夹作为证书导出的位置，切换到这个文件夹内，新建一个cer.cnf配置文件，如下：

[req]  
distinguished_name = req_distinguished_name  
req_extensions = v3_req  
        
[req_distinguished_name]  
countryName = ZH  
countryName_default = CN  
stateOrProvinceName = ZheJiang
stateOrProvinceName_default = ZheJiang 
localityName = HuZhou  
localityName_default = WuKang  
organizationalUnitName  = public section  
organizationalUnitName_default  = Domain Control Validated  
commonName = Future Machine Research Institute
commonName_max  = 64  
        
[ v3_req ]  
# Extensions to add to a certificate request  
basicConstraints = CA:FALSE  
keyUsage = nonRepudiation, digitalSignature, keyEncipherment  
extendedKeyUsage = serverAuth
subjectAltName = @alt_names  
        
[alt_names]  
IP.1 = 127.0.0.1
DNS.1 = localhost

根证书：

openssl genrsa -out ca-key.pem 2048

openssl req -new -key ca-key.pem -out ca-csr.pem -subj "/C=CN/ST=ZheJiang /L=HuZhou/O=Future Machine Research Institute/OU=Domain Control Validated/CN=Future Machine Research Institute"

openssl x509 -req -days 365 -sha256 -signkey ca-key.pem -in ca-csr.pem -out ca-cert.pem

服务器证书：

openssl genrsa -out server-key.pem 2048

openssl req -new -key server-key.pem -config cer.cnf -out server-csr.pem 

openssl x509 -req -days 365 -sha256 -CA ca-cert.pem -CAkey ca-key.pem -CAcreateserial -in server-csr.pem -out server-cert.pem -extensions v3_req -extfile cer.cnf