[英]Decrypt message with cryptography.fernet do not work
我刚刚尝试过加密和解密数据。 我首先生成了一个密钥,然后用它加密数据并将其保存到 XML 文件中。 现在读取此数据并应再次解密。
但现在我收到错误消息“cryptography.fernet.InvalidToken”。
import xml.etree.cElementTree as ET
from cryptography.fernet import Fernet
from pathlib import Path
def load_key():
"""
Load the previously generated key
"""
return open("../login/secret.key", "rb").read()
def generate_key():
"""
Generates a key and save it into a file
"""
key = Fernet.generate_key()
with open("../login/secret.key", "wb") as key_file:
key_file.write(key)
def decrypt_message(encrypted_message):
"""
Decrypts an encrypted message
"""
key = load_key()
f = Fernet(key)
message = encrypted_message.encode('utf-8')
decrypted_message = f.decrypt(message)
return(decrypted_message)
def decryptMessage(StringToDecrypt):
decryptedMessage = decrypt_message(StringToDecrypt)
return decryptedMessage
def loginToRoster(chrome):
credentials = readXML()
user = decryptMessage(credentials[0])
pw = decryptMessage(credentials[1])
userName = chrome.find_element_by_id('UserName')
userName.send_keys(user)
password = chrome.find_element_by_id('Password')
password.send_keys(pw)
在元组“凭据”中有 2 个加密字符串。
请帮助 - 已经尝试了一切来改变格式,但没有机会。
编辑:
错误信息:
Traceback (most recent call last):
File "C:/Users/r/Documents/GitHub/ServiceEvaluationRK/source/main.py", line 27, in <module>
login.loginToRoster(chrome)
File "C:\Users\r\Documents\GitHub\ServiceEvaluationRK\source\login.py", line 106, in loginToRoster
user = decryptMessage(credentials[0])
File "C:\Users\r\Documents\GitHub\ServiceEvaluationRK\source\login.py", line 49, in decryptMessage
decryptedMessage = decrypt_message(StringToDecrypt)
File "C:\Users\r\Documents\GitHub\ServiceEvaluationRK\source\login.py", line 43, in decrypt_message
decrypted_message = f.decrypt(message)
File "C:\Users\r\Documents\GitHub\ServiceEvaluationRK\venv\lib\site-packages\cryptography\fernet.py", line 75, in decrypt
timestamp, data = Fernet._get_unverified_token_data(token)
File "C:\Users\r\Documents\GitHub\ServiceEvaluationRK\venv\lib\site-packages\cryptography\fernet.py", line 107, in _get_unverified_token_data
raise InvalidToken
cryptography.fernet.InvalidToken
我找到了我的问题的答案:
我拿了ASCII
而不是utf-8
。 我在 function "loginToRoster" 中为变量 'user' 和 'pw' 添加了一个.decode('ASCII')
现在加密和解密工作正常。
因此,“loginToRoster”函数如下所示:
def loginToRoster(chrome):
credentials = readXML()
user = decryptMessage(credentials[0]).decode('ASCII')
pw = decryptMessage(credentials[1]).decode('ASCII')
userName = chrome.find_element_by_id('UserName')
userName.send_keys(user)
password = chrome.find_element_by_id('Password')
password.send_keys(pw)
您在decrypt_message function 中哪里定义load_key()
。 这不是一种方法,它只是一个未定义的 function。 您可能会收到该错误,因为密钥无效,因为您没有得到您保存的密钥。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.