在 PDO 准备语句中验证 password_hash()

Question

我正在尝试使用 bcrypt 算法对密码进行哈希处理，但我运行遇到了几个问题。首先，我找不到合适的地方来检查 password_verify() returns 是否为真。

$admin = $_POST['admin-user'];
$pass = $_POST['admin-pass'];

$password_hash = password_hash($pass, PASSWORD_BCRYPT);

if (isset($admin)&&isset($pass)&&!empty($admin)&&!empty($pass)) {

$admin_select = $link->prepare("SELECT `id` FROM `admins` WHERE `username` = :admin");

$admin_passwd = $link->prepare("SELECT `password` FROM `admins` WHERE `username` = :admin_pw");
$admin_passwd->execute(array(':admin_pw' => $admin));
$admin_pwd = $admin_passwd->fetch(PDO::FETCH_ASSOC);

    if (password_verify($pass, $admin_pwd)){

            if ($admin_select->execute(array(':admin' => $admin))) {
                $res = $link->query('SELECT COUNT(*) FROM requests');
                $query_num_rowz = $res->fetchColumn();
            if ($query_num_rowz == 0) {
                echo 'No records found';
            } else if ($query_num_rowz > 0) {
                $query = $link->prepare("SELECT id FROM admins WHERE username = :admin");
                 $query->execute(array(':admin' => $admin));
                 $admin_id = $query->fetch(PDO::FETCH_ASSOC);
                $_SESSION['admin_id'] = $admin_id;
                header('Location: index.php');
            }
        }
    }
}

其次，我不确定这是 select 用户密码的正确方法。

$admin_passwd = $link->prepare("SELECT `password` FROM `admins` WHERE `username` = :admin_pw");
$admin_passwd->execute(array(':admin_pw' => $admin));
$admin_pwd = $admin_passwd->fetch(PDO::FETCH_ASSOC);

Answer 1

由于您没有将 ->fetch 放入循环中，因此单次调用将 return 一行关联数组。您必须首先访问正确的索引（在本例中为 password）。然后将 password_verify 内的行值（至少如果已经散列）与用户输入进行比较。粗略示例：

if(!empty($_POST['admin-user'] && !empty($_POST['admin-pass']))) {
    $admin = $_POST['admin-user'];
    $pass = $_POST['admin-pass'];

    $admin_info = $link->prepare("SELECT `password` FROM `admins` WHERE `username` = :admin_user");
    $admin_info->execute(array(':admin_user' => $admin));
    $row = $admin_info->fetch(PDO::FETCH_ASSOC);

    if(!empty($row)) {
        // check if the hashed row password
        if(password_verify($pass, $row['password'])) {
            // okay
        }
    } else {
        // not found
    }
}

在 PDO 准备语句中验证 password_hash()

Verifying password_hash() in PDO prepared statements

php

mysql

pdo

prepared-statement