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【Python】文件分割+AES加密+Base64编码

作者:xulong1516519 / 发布于2012/11/13/ 1135

import binascii
from Crypto.Cipher import AES

class mycrypt():
    def __init__(self,key):
        self.key = key
        self.mode = AES.MODE_CBC
        
    def myencrypt(self,text):
        cryptor = AES.new(key,self.mode)
        length = 16
        count = text.count('')
        if count < length:
            add = (length-count) + 1
            text = text + (' ' * add)
        elif count > length:
            add = (length-(count % length)) + 1
            text = text + (' ' * add)
        self.ciphertext = cryptor.encrypt(text)
        return self.ciphertext
    
def split(filename, size):
    en = mycrypt("9878*(&^^&)0LLIu(*&^))#$@!KJLKJj")
    fp = open(filename, 'rb')
    i = 0
    n = 0
    temp = open(filename+'.part'+str(i),'w')
    buf = fp.read(4096)
    while(True):
        temp.write(binascii.b2a_base64(en.myencrypt(buf)))
        buf = fp.read(4096)
        if(buf == ''):
            temp.flush()
            temp.close()
            fp.close()
            return
        n += 1
        if(n == size):
            n = 0
            i += 1
            temp.flush()
            temp.close()
            temp = open(filename+'.part'+str(i),'wb')

if __name__ == '__main__':
    name = 'D:\google.zip'
    split(name, 524288)




import sys
import binascii
from os.path import exists
from Crypto.Cipher import AES

class mycrypt():
    def __init__(self,key):
        self.key = key
        self.mode = AES.MODE_CBC
            
    def mydecrypt(self,text):
        cryptor = AES.new(key,self.mode)
        plain_text  = cryptor.decrypt(text)
        return plain_text

en = mycrypt("9878*(&^^&)0LLIu(*&^))#$@!KJLKJj")

detext = 

    filename='D:\google.zip.part1'
    count = 0
    extPos = filename.find('.part')
    if extPos > 0:
        file = filename[:extPos]
        f1 = open(file, "wb")
        while True:
            count = count + 1
            partFile = file +'.part'+ str(count)
            if not exists(partFile):
                break
            else:
                f2 = open(partFile, "r")
                content = f2.read()
                f2.close()
                f1.write(en.mydecrypt(content).rstrip())
        f1.flush()
        f1.close()
    else:
        print 'File type? Can not combine!'

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