我编写了一小段代码来加密文件并对其进行解密。然而,它被卡在某处,我认为它是在它最初解密后,因为它创建加密文件但不打印'加密!'。我究竟做错了什么?它是其中一个循环吗?
代码:
from hashlib import md5
from Crypto import Random
from Crypto.Cipher import AES
import os
from Crypto import *
def encrypt(in_file, out_file, key, iv):
bs = AES.block_size
cipher = AES.new(key, AES.MODE_CBC, iv)
finished = False
print('check001')
while not finished:
chunk = in_file.read(1024 * bs)
print('check002')
if len(chunk) == 0 or len(chunk) % bs != 0:
padding_length = bs - (len(chunk) % bs)
chunk += padding_length * chr(padding_length)
finished = True
out_file.write(cipher.encrypt(chunk))
print('check003')
def decrypt(in_file, out_file, key, iv):
bs = AES.block_size
cipher = AES.new(key, AES.MODE_CBC, iv)
next_chunk = ''
finished = False
while not finished:
chunk, next_chunk = next_chunk, cipher.decrypt(in_file.read(1024 * bs))
if len(next_chunk) == 0:
padding_length = ord(chunk[-1])
if padding_length < 1 or padding_length > bs:
raise ValueError("bad decrypt pad (%d)" % padding_length)
if chunk[-padding_length:] != (padding_length * chr(padding_length)):
raise ValueError("bad decrypt")
chunk = chunk[:-padding_length]
finished = True
out_file.write(chunk)
encFile= input('Enter the path of the file you would like to encrypt: ')
doneFile= encFile + '.enc'
unFile = encFile + '.dec'
in_file = open(encFile, 'rb')
print('check004')
out_file = open(doneFile, 'wb')
print('check005')
key = os.urandom(32)
iv = os.urandom(16)
print('check006')
encrypt(in_file, out_file, key, iv)
print('check007')
in_file.close()
out_file.close()
print('Encrypted!')
in_file = open(doneFile, 'rb')
out_file = open(unFile, 'wb')
decrypt(in_file, out_file, key, iv)
in_file.close()
out_file.close()
print('Decrypted!')
答案 0 :(得分:0)
这可能只是将代码发布到问题中,但缩进看起来不正确:
while not finished:
chunk = in_file.read(1024 * bs)
if len(chunk) == 0 or len(chunk) % bs != 0:
padding_length = bs - (len(chunk) % bs)
chunk += padding_length * chr(padding_length)
finished = True
out_file.write(cipher.encrypt(chunk))
不应该将if语句缩进为:
while not finished:
chunk = in_file.read(1024 * bs)
if len(chunk) == 0 or len(chunk) % bs != 0:
padding_length = bs - (len(chunk) % bs)
chunk += padding_length * chr(padding_length)
finished = True
out_file.write(cipher.encrypt(chunk))
否则你将永远在阅读