Question

我正在尝试完成一个项目，在该项目中，您注册后可以创建一个密码，然后将该密码存储在一个文件中，该文件将在登录时读取（密码存储为哈希值）当用户输入用户密码已哈希被比作存储的文本。）我有问题，但是哈希密码比较存储的密码。看来无论我如何更改，两个字符串都不匹配。（将输入的密码与存储的密码哈希进行比较的地方在第38行。）

代码：

import hashlib

login_or_signup = input("Would You like to login or signup? ")
f = open("hashed_password_list.txt", "r")
print(f.read())

#SIGNUP PHAZE---------------------------------------------------

if login_or_signup == "signup":
  username = input("What is your name? ")
  password_sign_up = input("Enter your desired password: ")
  hash_object = hashlib.sha256(password_sign_up.encode('utf-8'))
  hex_dig = hash_object.hexdigest()
  #print(hex_dig)

  pw2 = input("confirm password: ")
  hash_object = hashlib.sha256(pw2.encode('utf-8'))
  hex_dig2 = hash_object.hexdigest()
  #print(hex_dig2)
  if hex_dig == hex_dig2:
    print("the passwords match! Thanks for creating an accout with us, " + username)
    text = hex_dig 
    saveFile = open('hashed_password_list.txt', 'w')
    saveFile.write(text)
    saveFile.close()
  else:
    print("sorry the passwords did not match.")

#LOGIN PHAZE---------------------------------------------------

elif login_or_signup == "login":
  password_sign_up2 = input("Enter your password: ")
  hash_object2 = hashlib.sha256(password_sign_up2.encode('utf-8'))
  hex_dig2 = hash_object2.hexdigest()
  #print(hex_dig)

  #CHECK PASSWORD---------------------------------------------
  if f == hex_dig2:
  #print(info)
    print("succesfully logged in! ")
    f.close()
  else:
    print("The password you entered did not match our database please create an account")

#IF USER ENTERS WRONG COMMAND AT BEGINNING----------------------

else:
  print("error!")

Answer 1

鉴于：

f = open("hashed_password_list.txt", "r")
print(f.read())

比较：

if f == hex_dig2:

是错误的，因为您正在将open的返回值（即文件对象）与字符串hex_dig2进行比较。

这就是您想要的：

if f.read() == hex_dig2:

但是请记住注释掉行print(f.read())，否则第一次读取将占用文件内容。

由于这只是用例的起点，因此请考虑使用with statement来管理文件资源，例如：

with open("hashed_password_list.txt", "r") as f:
    if f.read() == hex_dig2:
        print(info)
        print("Successfully logged in! ")
    else:
        print("The password you entered did not match our database please create an account")

比较输入的密码和存储的密码（转换为sha254）

1 个答案: