crypto_aes.py

from Crypto.Cipher import DES


class MyDESCrypt:
    key = chr(11) + chr(11) + chr(11) + chr(11) + chr(11) + chr(11) + chr(11) + chr(11)
    iv = chr(22) + chr(22) + chr(22) + chr(22) + chr(22) + chr(22) + chr(22) + chr(22)

    def __init__(self, key='', iv=''):
        if len(key) > 0:
            self.key = key
        if len(iv) > 0:
            self.iv = iv

    def ecrypt(self, ecryptText):
        try:
            cipherX = DES.new(self.key, DES.MODE_CBC, self.iv)
            pad = 8 - len(ecryptText) % 8
            padStr = ""
            for i in range(pad):
                padStr = padStr + chr(pad)
            ecryptText = ecryptText + padStr
            x = cipherX.encrypt(ecryptText)
            return x.encode('hex_codec').upper()
        except:
            return ""

    def decrypt(self, decryptText):
        try:

            cipherX = DES.new(self.key, DES.MODE_CBC, self.iv)
            str = decryptText.decode('hex_codec')
            y = cipherX.decrypt(str)
            return y[0:ord(y[len(y) - 1]) * -1]
        except:
            return ""

if __name__=='__main__':
    a=MyDESCrypt()
    b=a.ecrypt('123456')
    print b
    print a.decrypt(b)