Question

我正在尝试使用PyCrypto.AES进行加密和解密试验，当我尝试解密时，我会TypeError: 'str' does not support the buffer interface

我找到了一些解决方案，我必须编码或使用字符串，但我无法弄清楚如何使用它。

AESModule.py

from Crypto.Cipher import AES
#base64 is used for encoding. dont confuse encoding with encryption#
#encryption is used for disguising data
#encoding is used for putting data in a specific format
import base64
# os is for urandom, which is an accepted producer of randomness that
# is suitable for cryptology.
import os

def encryption(privateInfo,secret,BLOCK_SIZE):
    #32 bytes = 256 bits
    #16 = 128 bits
    # the block size for cipher obj, can be 16 24 or 32. 16 matches 128 bit.
    # the character used for padding
    # used to ensure that your value is always a multiple of BLOCK_SIZE
    PADDING = '{'
    # function to pad the functions. Lambda
    # is used for abstraction of functions.
    # basically, its a function, and you define it, followed by the param
    # followed by a colon,
    # ex = lambda x: x+5
    pad = lambda s: s + (BLOCK_SIZE - len(s) % BLOCK_SIZE) * PADDING
    # encrypt with AES, encode with base64
    EncodeAES = lambda c, s: base64.b64encode(c.encrypt(pad(s)))
    # generate a randomized secret key with urandom
    #secret = os.urandom(BLOCK_SIZE)
    print('Encryption key:',secret)
    # creates the cipher obj using the key
    cipher = AES.new(secret)
    # encodes you private info!
    encoded = EncodeAES(cipher, privateInfo)
    print('Encrypted string:', encoded)
    return(encoded)

def decryption(encryptedString,secret):
    PADDING = '{'
    DecodeAES = lambda c, e: c.decrypt(base64.b64decode(e)).rstrip(PADDING)
    #Key is FROM the printout of 'secret' in encryption
    #below is the encryption.
    encryption = encryptedString
    cipher = AES.new(secret)
    decoded = DecodeAES(cipher, encryption)
    print(decoded)

test.py

import AESModule
import base64
import os

BLOCK_SIZE = 16
key = os.urandom(BLOCK_SIZE)
c = AESRun2.encryption('password',key,BLOCK_SIZE)
AESRun2.decryption(c,key)

Answer 1

字符串（str）是文本。加密不处理文本，它以字节（bytes）。

进行处理

实际上，在必要时插入.encode和.decode来调用两者之间的转换。我推荐使用UTF-8编码。

在您的情况下，因为您已经将密文编码和解码为base-64，这是另一个字节/文本转换，您只需要对明文进行编码和解码。在将字符串传递给加密函数时，使用.encode("utf-8")对字符串进行编码，并在将其从解密函数中取出时使用.decode("utf-8")解码最终结果。

如果您正在阅读示例或教程，请确保它们适用于Python 3.在Python 2中str是一个字节字符串，将它用于文本和字节是很常见的，这非常令人困惑。在Python 3中，他们修复了它。

TypeError：使用PyCrypto.AES时，'str'不支持缓冲区接口

1 个答案: