"""
作者：20182109卢钟添
文件名称：test3_Server
时间2020.5.16
"""
# TCP服务器端
import binascii
import os
import socket
from pyDes import des, CBC, PAD_PKCS5

# 密钥
KEY = 'mHAbsLYz'


def des_descrypt(s):
    """
    DES 解密
    :param s: 加密后的字符串，16进制
    :return:  解密后的字符串
    """
    secret_key = KEY
    iv = secret_key
    k = des(secret_key, CBC, iv, pad=None, padmode=PAD_PKCS5)
    de = k.decrypt(binascii.a2b_hex(s), padmode=PAD_PKCS5)
    return de


f = open(r"D:\test3_S.txt", 'w')

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(('127.0.0.1', 8001))  # 绑定 local host = 127.0.0.1, port从0-65535

s.listen()  # 监听
conn, address = s.accept()  # 阻塞,conn是一个连接,address是对方地址
data = conn.recv(1024)  # 接收
rec = data.decode()
message = str(des_descrypt(rec), encoding="UTF-8")
try:
    f.write(message)
except IOError:
    sendee = "服务器已经收到了你发送的数据内容，但无法写入文件"
else:
    sendee = "服务器已经收到了你发送的数据内容，且已解密"

conn.sendall(sendee.encode())

f.close()
s.close()