泡菜后文件大小显着增加

Question

我正在读取文件并将数据(一旦加密)发送到字典,并在加密前后加上数据的哈希值.然后我挑选字典,但发现文件大小与源文件大小相比是巨大的.如果我将加密数据直接写入文件,其大小与源相同.知道为什么我的腌制文件如此之大？

#Encrypt data and get hashes        
def encryptAndExportFile(self, key, inFile, outFile):

    openInFile = open(inFile,"rb")
    inFileSize = os.path.getsize(inFile)
    inFileData = openInFile.readlines()
    openInFile.close()

    """ initialise cipher """

    cipher = AES.new(key, AES.MODE_CFB)

    """ initialise MD5 """

    m = hashlib.md5() #hash
    h = hashlib.md5() #hash of encrypted dataq

    encryptedData = []

    for data in inFileData:

        m.update(data) 
        encData = cipher.encrypt(data)
        h.update(encData)
        encryptedData.append(encData)


    hashResult = m.digest()
    encHashResult = h.digest()

    return hashResult, encryptedData, encHashResult

def storeEncryptedObject(self, obj, path):

    outFile = open(path, 'wb')
    pickle.dump(obj, outFile)
    outFile.close()

Answer 1

通过指定protocol=2pickle.dump的关键字参数来尝试使用二进制pickle .它应该更有效率.