详谈PHP中的密码安全性Password Hashing

如果你还在用md5加密,建议看看下方密码加密和验证方式。

先看一个简单的Password Hashing例子:

<?php //require 'password.php'; /** * 正确的密码是secret-password * $passwordHash 是hash 后存储的密码 * password_verify()用于将用户输入的密码和数据库存储的密码比对。成功返回true,否则false */ $passwordHash = password_hash('secret-password', PASSWORD_DEFAULT); echo $passwordHash; if (password_verify('bad-password', $passwordHash)) { // Correct Password echo 'Correct Password'; } else { echo 'Wrong password'; // Wrong password }

下方代码提供了一个完整的模拟的 User 类,在这个类中,通过使用Password Hashing,既能安全地处理用户的密码,又能支持未来不断变化的安全需求。

<?php class User { // Store password options so that rehash & hash can share them: const HASH = PASSWORD_DEFAULT; const COST = 14;//可以确定该算法应多复杂,进而确定生成哈希值将花费多长时间。(将此值视为更改算法本身重新运行的次数,以减缓计算。) // Internal data storage about the user: public $data; // Mock constructor: public function __construct() { // Read data from the database, storing it into $data such as: // $data->passwordHash and $data->username $this->data = new stdClass(); $this->data->passwordHash = 'dbd014125a4bad51db85f27279f1040a'; } // Mock save functionality public function save() { // Store the data from $data back into the database } // Allow for changing a new password: public function setPassword($password) { $this->data->passwordHash = password_hash($password, self::HASH, ['cost' => self::COST]); } // Logic for logging a user in: public function login($password) { // First see if they gave the right password: echo "Login: ", $this->data->passwordHash, "\n"; if (password_verify($password, $this->data->passwordHash)) { // Success - Now see if their password needs rehashed if (password_needs_rehash($this->data->passwordHash, self::HASH, ['cost' => self::COST])) { // We need to rehash the password, and save it. Just call setPassword $this->setPassword($password); $this->save(); } return true; // Or do what you need to mark the user as logged in. } return false; } }

以上这篇详谈PHP中的密码安全性Password Hashing就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持脚本之家。

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