Question

下面是我使用python lib的Pycrypto模块编写的代码片段，用于加密和解密文件。

我能够加密文件，但是 decryption 逻辑似乎达不到要求。

第一阶段，我正在加密文件文本，即“ infile1.txt”，它可以按预期工作。在第二阶段，“ verifile1.txt”的输出不显示解密的文本。

import os, random, struct
from Crypto.Cipher import AES
from Crypto import Random
import hashlib

password = 'kitty'
key = hashlib.sha256(password.encode('utf-8')).digest()


%%writefile infile1.txt
ONE on FIRST
TWO on SECOND
THREE on THIRD


fsz = os.path.getsize('infile1.txt')
iv = Random.new().read(16)
encryptor = AES.new(key, AES.MODE_CBC, iv)
sz = 2048


#Encryptor Code

with open('encfile1.txt', 'wb') as fout:
    fout.write(struct.pack('<Q', fsz))
    fout.write(iv)
    with open('infile1.txt') as fin:
        while True:
            data = fin.read(sz)
            n = len(data)
            if n == 0:
                break
            elif n % 16 != 0:
                data += ' ' * (16 - n % 16)
        encd = encryptor.encrypt(data)
        fout.write(encd)



#Decryptor decode

with open('encfile1.txt','rb') as fin:
    fsz = struct.unpack('<Q', fin.read(struct.calcsize('Q')))[0]
    iv = fin.read(16)
    decryptor = AES.new(key, AES.MODE_CBC, iv)
    with open('verfile1.txt', 'wb') as fout:
        while True:
            data = fin.read(sz)
            n = len(data)
            if n == 0:
                break
            fout.write(decryptor.decrypt(data))
        fout.truncate(fsz)

使用Pycrypto进行加密和解密-Python

0 个答案: