python使用ssl的单向认证和双向认证的客户端代码

参考文档：https://blog.csdn.net/wuliganggang/article/details/78428866

实现：

1. 单向认证：client需要一个ca.crt，校验服务器的合法性。

def connectSSL(self, _tcp_ip, _tcp_port, _ca_certs='ca.crt'):
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    
    sk = ssl.wrap_socket(s, cert_reqs=ssl.CERT_REQUIRED, ca_certs=_ca_certs)

    try:
        sk.connect((_tcp_ip, _tcp_port))
    except Exception, e:
        logging.error(str(e))
        exit(1)

2. 双向认证：client对server进行校验，同时server也对client进行校验，client需要client.key 、client.crt 、ca.crt

def connectSSL(self, _tcp_ip='192.168.1.100', _tcp_port=10000, _keyfile='user.key', _certfile='user.pem', _ca_certs='ca.crt'):
            
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    
    sk = ssl.wrap_socket(s, keyfile=_keyfile, certfile=_certfile, cert_reqs=ssl.CERT_REQUIRED, ca_certs=_ca_certs)

    try:
        sk.connect((_tcp_ip, _tcp_port))
        print "cert type: " , sk.getpeercert()
    except Exception, e:
        logging.error(str(e))
        exit(1)

注：python2.7.9版本后支持对证书加密