openssl生成https自签名证书

环境：ubuntu 16.04
OpenSSL 1.0.2g 1 Mar 2016

为了方便创建10年的证书，如果你需要更长自行修改3650为自己想要的天数

准备部分
1.创建目录
mkdir -p /tmp/https_crt && cd  /tmp/https_crt
2.创建生成证书时需要的文件夹和文件
 mkdir -p ./demoCA/newcerts
  touch ./demoCA/index.txt
  echo 00 > ./demoCA/serial

3. 证书应答文件
   cat>https.conf<<EOF
   [ req ]
   default_bits = 4096
   prompt = no
   default_md = sha256
   distinguished_name = dn

[ dn ]
C = CN
ST = yourstate
L = yourcity
O = yourcommpany
OU = yourcommpany
CN = yourdomain.com
EOF

4.生成CA私钥
openssl genrsa -out ca.key 4096
openssl req -new -x509 -days 3650 -key ca.key -out ca.crt -config https.conf

5.生成证书私钥
openssl genrsa -out server.pem 4096

6.制作解密后的证书私钥
openssl rsa -in server.pem -out server.key
7.生成签名请求
openssl req -new -key server.pem -out server.csr -config https.conf
8.用CA 进行签名
openssl ca -policy policy_anything -days 3650 -cert ca.crt -keyfile ca.key -in server.csr -out server.crt<<EOF
y
y
EOF