问题描述
我想加密一些密码并将其放入数据库。如何将这些东西保存在数据库中，如果所有者匹配，我可以检索数据。
I would like to encrypt some passwords and put it in database. How do I keep this stuff in a database so I can retrieve the data if the owner matches.
示例
<?php
// some validations and other staff
$data = $_POST['input'];
$hash = crypt($data);
//then database insert code
?>
如果我 echo $ hash ，它给我一些加密数据，但是当我刷新页面时，数字会不时变化。如何保持数据静态？输入用户名和密码时，如何告知加密的密码，这是所有者。
If I echo the $hash, it's giving me some encrypted data but when I refresh the page, the numbers are changing from time to time. How do I keep the data static? How will I tell the encrypted password that this was the owner when username and password entered.
示例
<?php
//time of encryption
$name = "someone";
$pass = "p1x6Fui0p>j";
$hash = "$pass"; //outcome of $hash e.g. $1$aD2.bo0.$S93XNfgOFLskhis0qjE.Q/
// $hash and $name inserted in database
?>
当用户尝试使用收集详细信息登录时，我如何引用 $哈希$ 1 $ aD2.bo0。$ S93XNfgOFLskhis0qjE.Q /等于 $ pass p1x6Fui0p> j？
When the user tries to login with collect details, how will I refer $hash "$1$aD2.bo0.$S93XNfgOFLskhis0qjE.Q/" was equal to $pass "p1x6Fui0p>j" ?
推荐答案
crypt（）有一个不幸的名字。这不是一个加密功能，而是单向散列函数。
crypt() has an unfortunate name. It's not an encryption function, but a one-way hashing function.
如果您使用PHP 5.5+，只需使用 password_hash 和 password_verify ：
If you're using PHP 5.5+, just use password_hash and password_verify:
$hash = password_hash($data, PASSWORD_BCRYPT); // Bcrypt is slow, which is good
并验证输入的密码：
if (password_verify($pass, $hash)) {
// The password is correct
}
现在回答您的实际问题：密码散列的目的是在不实际存储其明文密码的情况下验证用户。如果 hash（a）== hash（b），那么你可以确定 a == b 。在你的情况下，你已经有 hash（a）（ $ hash ），所以你只需要哈希输入密码并比较生成的哈希值。
Now to answer your actual question: the purpose of password hashing is to authenticate users without actually storing their plaintext passwords. If hash(a) == hash(b), then you can be pretty sure that a == b. In your case, you already have hash(a) ($hash), so you just need to hash the inputted password and compare the resulting hashes.
crypt（） b
if (crypt($pass, $hash) === $hash) {
// The password is correct
}
这篇关于如何在登录时匹配用户名和加密密码的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！