1. 创建certificate request configuration file
cert_req.conf
************************************************
[ req ]
default_bits =
default_keyfile = keystonekey.pem
default_md = default prompt = no
distinguished_name = Distiguished_name [ Distiguished_name ]
countryName = CN
stateOrProvinceName = BJ
localityName = Beijing
organizationName = example
organizationalUnitName = example
commonName = Keystone Signing
emailAddress = example@example.com
************************************************
2. 生成私钥和CSR（Certificate Signing Request），注意私钥不能加密（-nodes选项），最终私钥为signing_key.pem, CSR为signing_cert_req.pem
$ openssl \
req -newkey rsa: -nodes\
-keyout signing_key.pem -keyform PEM \
-out signing_cert_req.pem -outform PEM \
-config cert_req.conf \
3. 将生成的CSR发给CA，请求我们的证书
我们采用CAcert来生成证书，仅用于实验环境，最终保存为：signing_cert.pem
4. 获取CA的证书，用于构建证书信任链
这里我们直接采用CAcert公司的证书，保存为：ca_cert.pem