客户端报错：SSL handshake failed with baidumy:8000: certificate verify failed
服务端报错：SSL handshake failed: sslv3 alert certificate expired
原因：所发的server-cert.pem过期了，需要重新扮发新证书，用openssl发自己的证书，默认有效期1个月。
使用openssl扮发ca证书命令行如下：（有效期36500，100年）
openssl req -x509 -newkey rsa:4096 -days 36500 -nodes -keyout ca-key.pem -out ca-cert.pem -subj "/C=CHINA/ST=Jiangsu/L=nanjing/O=NJ/OU=YJ/CN=YJ/[email protected]"
openssl req -newkey rsa:4096 -nodes -keyout server-key.pem -out server-req.pem -subj "/C=CHINA/ST=Jiangsu/L=nanjing/O=NJ/OU=YJ/CN=YJ/[email protected]"
openssl x509 -days 36500 -req -in server-req.pem -CA ca-cert.pem -CAkey ca-key.pem -CAcreateserial -out server-cert.pem
### show the data
openssl x509 -in ca-cert.pem -noout -text
openssl x509 -in server-cert.pem -noout -text