from Crypto.Cipher import AES
from Crypto.Util.Padding import pad
import base64
import binascii
# 数据类
class MData():
def __init__(self, data = b"",characterSet='utf-8'):
# data肯定为bytes
self.data = data
self.characterSet = characterSet
def readFile(self, filename):
with open(filename,'r') as f:
self.data = f.read()
return self.data
def saveData(self,FileName):
with open(FileName,'wb') as f:
f.write(self.data)
def fromString(self,data):
self.data = data.encode(self.characterSet)
return self.data
def fromBase64(self,data):
self.data = base64.b64decode(data.encode(self.characterSet))
return self.data
def fromHexStr(self,data):
self.data = binascii.a2b_hex(data)
return self.data
def toString(self):
return self.data.decode(self.characterSet)
def toBase64(self):
return base64.b64encode(self.data).decode()
def toHexStr(self):
return binascii.b2a_hex(self.data).decode()
def toBytes(self):
return self.data
def __str__(self):
try:
return self.toString()
except Exception:
return self.toBase64()
### 封装类
class AEScryptor():
def __init__(self,key,mode,iv = '',paddingMode= "NoPadding",characterSet ="utf-8"):
'''
构建一个AES对象
key: 秘钥，字节型数据
mode: 使用模式，只提供两种，AES.MODE_CBC, AES.MODE_ECB
iv： iv偏移量，字节型数据
paddingMode: 填充模式，默认为NoPadding, 可选NoPadding，ZeroPadding，PKCS5Padding，PKCS7Padding
characterSet: 字符集编码
'''
self.key = self._pad(key)
self.mode = mode
self.iv = iv
self.characterSet = characterSet
self.paddingMode = paddingMode
self.data = ""
def _pad(self, data):
return pad(data, AES.block_size, style='pkcs7')
def __ZeroPadding(self,data):
data += b'\x00'
while len(data) % 16 != 0:
data += b'\x00'
return data
def __StripZeroPadding(self,data):
data = data[:-1]
while len(data) % 16 != 0:
data = data.rstrip(b'\x00')
if data[-1] != b"\x00":
break
return data
def __PKCS5_7Padding(self,data):
needSize = 16-len(data) % 16
if needSize == 0:
needSize = 16
return data + needSize.to_bytes(1,'little')*needSize
def __StripPKCS5_7Padding(self,data):
paddingSize = data[-1]
return data.rstrip(paddingSize.to_bytes(1,'little'))
def __paddingData(self,data):
if self.paddingMode == "NoPadding":
if len(data) % 16 == 0:
return data
else:
return self.__ZeroPadding(data)
elif self.paddingMode == "ZeroPadding":
return self.__ZeroPadding(data)
elif self.paddingMode == "PKCS5Padding" or self.paddingMode == "PKCS7Padding":
return self.__PKCS5_7Padding(data)
else:
print("不支持Padding")
def __stripPaddingData(self,data):
if self.paddingMode == "NoPadding":
return self.__StripZeroPadding(data)
elif self.paddingMode == "ZeroPadding":
return self.__StripZeroPadding(data)
elif self.paddingMode == "PKCS5Padding" or self.paddingMode == "PKCS7Padding":
return self.__StripPKCS5_7Padding(data)
else:
print("不支持Padding")
def setCharacterSet(self,characterSet):
'''
设置字符集编码
characterSet: 字符集编码
'''
self.characterSet = characterSet
def setPaddingMode(self,mode):
'''
设置填充模式
mode: 可选NoPadding，ZeroPadding，PKCS5Padding，PKCS7Padding
'''
self.paddingMode = mode
def decryptFromBase64(self,entext):
'''
从base64编码字符串编码进行AES解密
entext: 数据类型str
'''
mData = MData(characterSet=self.characterSet)
self.data = mData.fromBase64(entext)
return self.__decrypt()
def decryptFromHexStr(self,entext):
'''
从hexstr编码字符串编码进行AES解密
entext: 数据类型str
'''
mData = MData(characterSet=self.characterSet)
self.data = mData.fromHexStr(entext)
return self.__decrypt()
def decryptFromString(self,entext):
'''
从字符串进行AES解密
entext: 数据类型str
'''
mData = MData(characterSet=self.characterSet)
self.data = mData.fromString(entext)
return self.__decrypt()
def decryptFromBytes(self,entext):
'''
从二进制进行AES解密
entext: 数据类型bytes
'''
self.data = entext
return self.__decrypt()
def encryptFromString(self,data):
'''
对字符串进行AES加密
data: 待加密字符串，数据类型为str
'''
self.data = data.encode(self.characterSet)
return self.__encrypt()
def __encrypt(self):
if self.mode == AES.MODE_CBC:
aes = AES.new(self.key,self.mode,self.iv)
elif self.mode == AES.MODE_ECB:
aes = AES.new(self.key,self.mode)
else:
print("不支持这种模式")
return
data = self.__paddingData(self.data)
enData = aes.encrypt(data)
return MData(enData)
def __decrypt(self):
if self.mode == AES.MODE_CBC:
aes = AES.new(self.key,self.mode,self.iv)
elif self.mode == AES.MODE_ECB:
aes = AES.new(self.key,self.mode)
else:
print("不支持这种模式")
return
data = aes.decrypt(self.data)
mData = MData(self.__stripPaddingData(data),characterSet=self.characterSet)
return mData
def decode(key, iv, data):
aes = AEScryptor(key,AES.MODE_CBC,iv,paddingMode= "ZeroPadding",characterSet='utf-8')
rData = aes.decryptFromBase64(data)
return rData
def encode(key, iv, data):
aes = AEScryptor(key,AES.MODE_CBC,iv,paddingMode= "ZeroPadding",characterSet='utf-8')
rData = aes.encryptFromString(data)
return rData
import sys, getopt
if __name__ == '__main__':
key = b'13224'
iv = b"1912003030020218"
m = MData();
# 加密或解密文件
opts, args = getopt.getopt(sys.argv[1:], 'k:e:d:',['key=','encode=','decode='])
for opt, arg in opts:
if opt in ['-k', '--key']:
key = arg.encode('utf-8')
if opt in ['-e', '--encode']:
data = m.readFile(arg)
res = encode(key, data)
print(res)
if opt in ['-d','--decode']:
data = m.readFile(arg)
res = decode(key, data)
print(res)