Implementing software registration function based on python script

#coding:utf8
#register.py
#功能说明：用户运行程序后，自动检测认证状态，如果未经认证，就需要注册。注册过程是用户将程序运行后显示的机器码（卷序号）发回给管理员，管理员通过加密后生成加密文件或字符串给回用户。
#每次登录，在有注册文件或者注册码的情况下，软件就会通过DES和base64解码，如果解码后和重新获取的机器码一致，则通过认证，进入主程序。
import base64
import win32api
from pyDes import *
#from binascii import a2b_hex #如果需要用二进制编码保存注册码和注册文件可以使用binascii转换
class register:
def __init__(self):
self.Des_Key = "BHC#@*UM" # Key
self.Des_IV = "\x22\x33\x35\x81\xBC\x38\x5A\xE7" # 自定IV向量
#获取C盘卷序列号
#使用C盘卷序列号的优点是长度短，方便操作，比如1513085707，但是对C盘进行格式化或重装电脑等操作会影响C盘卷序列号。
#win32api.GetVolumeInformation(Volume Name, Volume Serial Number, Maximum Component Length of a file name, Sys Flags, File System Name)
#return('', 1513085707, 255, 65470719, 'NTFS'),volume serial number is 1513085707.
def getCVolumeSerialNumber(self):
CVolumeSerialNumber=win32api.GetVolumeInformation("C:\\")[1]
#print chardet.detect(str(CVolumeSerialNumber))
#print CVolumeSerialNumber
if CVolumeSerialNumber:
return str(CVolumeSerialNumber) #number is long type，has to be changed to str for comparing to content after.
else:
return 0
#使用DES加base64的形式加密
#考虑过使用M2Crypto和rsa，但是都因为在windows环境中糟糕的安装配置过程而放弃
def DesEncrypt(self,str):
k = des(self.Des_Key, CBC, self.Des_IV, pad=None, padmode=PAD_PKCS5)
EncryptStr = k.encrypt(str)
#EncryptStr = binascii.unhexlify(k.encrypt(str))
return base64.b64encode(EncryptStr) #转base64编码返回
#des解码
def DesDecrypt(self,str):
k = des(self.Des_Key, CBC, self.Des_IV, pad=None, padmode=PAD_PKCS5)
DecryptStr = k.decrypt(str)
#DecryptStr = a2b_hex(k.decrypt(str))
print DecryptStr
return DecryptStr
#获取注册码，验证成功后生成注册文件
def regist(self):
key = raw_input('please input your register code: ')
#由于输入类似“12”这种不符合base64规则的字符串会引起异常，所以需要增加输入判断
#while key
if key:
content = self.getCVolumeSerialNumber() //number has been changed to str type after use str() 
#print chardet.detect(content)
#print type(content)
#print content
#type(key_decrypted) is str
key_decrypted=str(self.DesDecrypt(base64.b64decode(key)))
#print chardet.detect(key_decrypted)
#print key_decrypted
#type(key_decrypted) is str
if content!=0 and key_decrypted!=0:
if content != key_decrypted:
print "wrong register code, please check and input your register code again:"
self.regist()
elif content==key_decrypted:
print "register succeed."
#读写文件要加判断
with open('./register','w') as f:
f.write(key)
f.close()
return True
else:
return False
else:
return False
else:
self.regist()
return False
def checkAuthored(self):
content=self.getCVolumeSerialNumber()
checkAuthoredResult = 0
#读写文件要加判断
try:
f=open('./register','r')
if f:
key=f.read()
if key:
key_decrypted=self.DesDecrypt(base64.b64decode(key))
if key_decrypted:
if key_decrypted == content:
checkAuthoredResult = 1
else:
checkAuthoredResult = -1
else:
checkAuthoredResult = -2
else:
checkAuthoredResult = -3
else:
self.regist()
except IOError:
print IOError
print checkAuthoredResult
return checkAuthoredResult
if __name__ == '__main__':
reg=register()
reg.regist()

#CVolumeSerialNumber: 1513085707
#after encryption: ro5RVXZoP0KmnogYDeepUg==
#the HardDiskNumber: 32535332584e4741343536393237204620202020
#after encryption: MzI1MzUzMzI1ODRlNDc0MTM0MzUzNjM5MzIzNzIwNDYyMDIwMjAyMA==

#虽然使用wmi可以获取磁盘序列号，可是磁盘序列号是3253533258**************3237204620202020，加密后太长，不方便操作，所以弃置
import wmi
def getHardDiskNumber(self):
c = wmi.WMI()
for physical_disk in c.Win32_DiskDrive():
return physical_disk.SerialNumber