Linux平台openssl工具生成CA证书的命令 配置文件 证书

生成密钥、证书 第一步，为服务器端和客户端准备公钥、私钥 # 生成服务器端私钥 openssl genrsa -out server.key 1024 # 生成服务器端公钥 openssl rsa -in server.key -pubout -out server.pem # 生成客户端私钥 openssl genrsa -out client.key 1024 # 生成客户端公钥 openssl rsa -in client.key -pubout -out client.pem 第二步，生成 CA 证书及注意事项 # 生成 CA 私钥 openssl genrsa -out ca.key 1024 # X.509 Certificate Signing Request (CSR) Management. openssl req -new -key ca.key -out ca.csr # X.509 Certificate Data Management. openssl x509 -req -in ca.csr -signkey ca.key -out ca.crt 在执行第二步时会出现： ➜ keys openssl req -new -key ca.key -out ca.csr You are about to be asked to enter information that will be incorporated into your certificate request. What you are about to enter is what is called a Distinguished Name or a DN. There are quite a few fields but you can leave some blank For some fields there will be a default value, If you enter '.', the field will be left blank. ----- Country Name (2 letter code) [AU]:CN State or Province Name (full name) [Some-State]:Zhejiang Locality Name (eg, city) []:Hangzhou Organization Name (eg, company) [Internet Widgits Pty Ltd]:My CA Organizational Unit Name (eg, section) []: Common Name (e.g. server FQDN or YOUR name) []:localhost Email Address []: 注意，这里的 Organization Name (eg, company) [Internet Widgits Pty Ltd]: 后面生成客户端和服务器端证书的时候也需要填写，不要写成一样的！！！可以随意写如：My CA, My Server, My Client。 然后 Common Name (e.g. server FQDN or YOUR name) []: 这一项，是最后可以访问的域名，我这里为了方便测试，写成 localhost 第三步，生成服务器端证书和客户端证书 # 服务器端需要向 CA 机构申请签名证书，在申请签名证书之前依然是创建自己的 CSR 文件 openssl req -new -key server.key -out server.csr # 向自己的 CA 机构申请证书，签名过程需要 CA 的证书和私钥参与，最终颁发一个带有 CA 签名的证书 openssl x509 -req -CA ca.crt -CAkey ca.key -CAcreateserial -in server.csr -out server.crt # client 端 openssl req -new -key client.key -out client.csr # client 端到 CA 签名 openssl x509 -req -CA ca.crt -CAkey ca.key -CAcreateserial -in client.csr -out client.crt