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我正在尝试读取一个字符串加密它保存到一个文本文件然后读取文本文件读取加密字符串在python中解密它，我正在使用密码库，我认为错误是因为 python 列表添加 ["string"]在开始和结束时，我也尝试将读取列表转换为二进制，但它将它作为 b [“b'key'”]，任何想法

def write_key():                                #creating a key
    key = Fernet.generate_key()
    with open("key.key", "wb") as key_file:
        key_file.write(key)

def load_key():                                 #reading the generated key
    return open("key.key", "rb").read()

data = input()
data = bytes(data,'utf-8')                      #you cannot encrypt str do converting it to bytes
write_key()                                     #creating the key
key = load_key()                                #loading the key
f = Fernet(key)
encrypted = f.encrypt(data)                     #encrypting the data
print(encrypted)

file = open("encrypted.txt", "w")               #writing the encrypted the data       
file.write("%s\n" %(encrypted))
file.close()

with open("encrypted.txt", "r") as f:           #reading the encrypted the data
    rdata = [line.rstrip('\n') for line in f]    #removing \n as it is added while saving the txt file
print(rdata)


key = load_key()
f = Fernet(key)
decrypted_encrypted = f.decrypt(rdata)
print(decrypted_encrypted)

我得到的输出：

Enter the secret message: YOUR MESSAGE
Printing the encrypted message after encryption b'gAAAAABfWdNG64dvT-tpQA1EA-zYC8lsC4hL9EoZ0e008BMIWikfafT_FOmLyjWJh2dinGG8oi6VI16XCpwB1H4AZE2sk-ZgJQ=='
Printing the encrypted message after reading it from the txt file ["b'gAAAAABfWdNG64dvT-tpQA1EA-zYC8lsC4hL9EoZ0e008BMIWikfafT_FOmLyjWJh2dinGG8oi6VI16XCpwB1H4AZE2sk-ZgJQ=='"]
Traceback (most recent call last):

  File "C:\Users\Documents\Projects\temp.py", line 31, in <module>
    decrypted_encrypted = f.decrypt(rdata)

  File "C:\Users\anaconda3\lib\site-packages\cryptography\fernet.py", line 74, in decrypt
    timestamp, data = Fernet._get_unverified_token_data(token)

  File "C:\Users\anaconda3\lib\site-packages\cryptography\fernet.py", line 85, in _get_unverified_token_data
    utils._check_bytes("token", token)

  File "C:\Users\anaconda3\lib\site-packages\cryptography\utils.py", line 31, in _check_bytes
    raise TypeError("{} must be bytes".format(name))

TypeError: token must be bytes
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1 回答 1

1

传递给的数据decrypt应该是字节而不是字符串。因此这个问题。
在读取和写入时encrypted.txt使用各自的二进制模式，如下所示。

def write_key():                                #creating a key
    key = Fernet.generate_key()
    with open("key.key", "wb") as key_file:
        key_file.write(key)

def load_key():                                 #reading the generated key
    return open("key.key", "rb").read()

data = input()
data = bytes(data,'utf-8')                      #you cannot encrypt str do converting it to bytes
write_key()                                     #creating the key
key = load_key()                                #loading the key
f = Fernet(key)
encrypted = f.encrypt(data)                     #encrypting the data

file = open("encrypted.txt", "wb")               #writing the encrypted the data       
file.write(encrypted)
file.close()

with open("encrypted.txt", "rb") as f:           #reading the encrypted the data
    rdata =f.read()

key = load_key()
f = Fernet(key)
decrypted_encrypted = f.decrypt(rdata)
print(decrypted_encrypted)
于 2020-09-10T07:38:47.340 回答