我已经拥有一个可工作的程序,但唯一不工作的是我的
我的程序:
当我将第45行替换为:
decrypt_file()
函数。我仍然可以从文件中复制加密文本并将其放入我的decrypt()
函数中使其工作,但当我尝试使用我的应该很方便的decrypt_file()
函数时,它会抛出一个错误。 现在我99.999%确定我的encrypt()
和decrypt()
函数没有问题,但是当我读取和编码文本文件时,字节和字符串转换存在问题,导致出现错误; 我只是找不到错误所在。请帮忙!我的程序:
from Crypto import Random
from Crypto.Cipher import AES
def encrypt(message, key=None, key_size=256):
def pad(s):
x = AES.block_size - len(s) % AES.block_size
return s + ((bytes([x])) * x)
padded_message = pad(message)
if key is None:
key = Random.new().read(key_size // 8)
iv = Random.new().read(AES.block_size)
cipher = AES.new(key, AES.MODE_CBC, iv)
return iv + cipher.encrypt(padded_message)
def decrypt(ciphertext, key):
unpad = lambda s: s[:-s[-1]]
iv = ciphertext[:AES.block_size]
cipher = AES.new(key, AES.MODE_CBC, iv)
plaintext = unpad(cipher.decrypt(ciphertext))[AES.block_size:]
return plaintext
def encrypt_file(file_name, key):
f = open(file_name, 'r')
plaintext = f.read()
plaintext = plaintext.encode('utf-8')
enc = encrypt(plaintext, key)
f.close()
f = open(file_name, 'w')
f.write(str(enc))
f.close()
def decrypt_file(file_name, key):
def pad(s):
x = AES.block_size - len(s) % AES.block_size
return s + ((str(bytes([x]))) * x)
f = open(file_name, 'r')
plaintext = f.read()
x = AES.block_size - len(plaintext) % AES.block_size
plaintext += ((bytes([x]))) * x
dec = decrypt(plaintext, key)
f.close()
f = open(file_name, 'w')
f.write(str(dec))
f.close()
key = b'\xbf\xc0\x85)\x10nc\x94\x02)j\xdf\xcb\xc4\x94\x9d(\x9e[EX\xc8\xd5\xbfI{\xa2$\x05(\xd5\x18'
encrypt_file('to_enc.txt', key)
我加密的文本文件:
b';c\xb0\xe6Wv5!\xa3\xdd\xf0\xb1\xfd2\x90B\x10\xdf\x00\x82\x83\x9d\xbc2\x91\xa7i M\x13\xdc\xa7'
我在尝试使用decrypt_file
时出现了错误:
Traceback (most recent call last):
File "C:\Python33\testing\test\crypto.py", line 56, in <module>
decrypt_file('to_enc.txt', key)
File "C:\Python33\testing\test\crypto.py", line 45, in decrypt_file
plaintext += ((bytes([x]))) * x
TypeError: Can't convert 'bytes' object to str implicitly
[Finished in 1.5s]
当我将第45行替换为:
plaintext += ((str(bytes([x])))) * x
,我收到以下错误信息:Traceback (most recent call last):
File "C:\Python33\testing\test\crypto.py", line 56, in <module>
decrypt_file('to_enc.txt', key)
File "C:\Python33\testing\test\crypto.py", line 46, in decrypt_file
dec = decrypt(plaintext, key)
File "C:\Python33\testing\test\crypto.py", line 23, in decrypt
plaintext = unpad(cipher.decrypt(ciphertext))[AES.block_size:]
File "C:\Python33\lib\site-packages\Crypto\Cipher\blockalgo.py", line 295, in decrypt
return self._cipher.decrypt(ciphertext)
ValueError: Input strings must be a multiple of 16 in length
[Finished in 1.4s with exit code 1]
bytes
对象。这是一个内置类型。程序中没有定义它,所以使用了内置对象。我认为你指的是plaintext
。 - Keith