python - 带有python加密模块的InvalidToken

当我尝试在此行cryptography.fernet.InvalidToken解密文件的内容时，出现此错误=> exit1 = key.decrypt(listCipher[0])。
我到处寻找，但没有发现任何有关此问题的信息。我尝试使用ConfigParser替换列表，但它仍然无法正常工作，我不认为这是问题所在。欢迎提供一些帮助。

from cryptography.fernet import Fernet

entry1 = "First_sentence"
entry2 = "Second_sentence"
entry3 = "Third_sentence"

    ##--- Key creation
firstKey = Fernet.generate_key()
file = open('.\\TEST\\key.key', 'wb')
file.write(firstKey)
file.close()

    ##--- Cipher entries
key = Fernet(firstKey)
chiffrentry1 = key.encrypt(bytes(entry1, "utf-8"))
chiffrentry2 = key.encrypt(bytes(entry2, "utf-8"))
chiffrentry3 = key.encrypt(bytes(entry3, "utf-8"))
listAll = [chiffrentry1, chiffrentry2, chiffrentry3]

    ##-- Write cipher text in file
with open('.\\TEST\\text_encrypt.txt', 'w') as pt:
    for ligne in listAll:
        pt.write("%s\n" % ligne)

    ##--- Recover file to decrypt cipher text
listCipher = []

with open('.\\TEST\\text_encrypt.txt', 'rb') as pt:
    for line in pt:
        listCipher.append(line.strip())

exit1 = key.decrypt(listCipher[0])
exit2 = key.decrypt(listCipher[1])
exit3 = key.decrypt(listCipher[2])

print(exit1)
print(exit2)
print(exit3)

最佳答案

'%s\n'%ligne正在修改您的数据。例如，如果我执行以下操作：

>>> with open('afile.txt', 'w') as fh:
     for i in range(2):
             fh.write('%s\n'%b'hi there')

12
12
>>> with open('afile.txt', 'rb') as fh:
     for line in fh:
             print(line)

b"b'hi there'\n"
b"b'hi there'\n"

这里的问题是您正在执行的类型转换。 Fernet的操作需要bytes，并且您将加密值存储为string。当您将bytes对象转换为string时，您不会确切地知道该字节字符串是什么。为避免这种情况，请勿转换类型

with open('.\\TEST\\text_encrypt.txt', 'wb') as pt:
    # join supports byte-strings
    to_write = b'\n'.join(listAll)
    pt.write(to_write)

# Now I can read a bytes object directly
with open('.\\TEST\\text_encrypt.txt', 'rb') as fh:
    # this is a single bytes-string with b'\n' chars inside it
    contents = fh.read()

# byte-strings also support split
ciphers = contents.split(b'\n')

for cipher in ciphers:
    print(key.decrypt(cipher))

关于python - 带有python加密模块的InvalidToken，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/54874767/