PHP 重设密码

Question

我对如何加密新密码以进入数据库感到困惑。当我输入密码时，它会加密并检查数据库是否正确，为了验证新密码，它只会将其更改为纯文本。

if (count($_POST) > 0) {
    $result = mysqli_query($conn, "SELECT *from users WHERE id='" . $_SESSION["id"] . "'");
    $row = mysqli_fetch_array($result);
    if (MD5(mysqli_real_escape_string($_POST["currentPassword"] == $row["password"]))) {
        mysqli_query($conn, "UPDATE users set password='" . $_POST["newPassword"] . "' WHERE id='" . $_SESSION["id"] . "'");
        $message = "Password Changed";
    } else
        $message = "Current Password is not correct";
}

Answer 1

    // password encryption for security.

$salt = mcrypt_create_iv(22, MCRYPT_DEV_URANDOM);
$salt = base64_encode($salt);
$salt = str_replace('+', '.', $salt);
$hash = crypt($pass, 'y$'.$salt.'$');

//echo ("".$hash."<br />\n");

$pass是密码输入的密码

保存$hash到数据库

验证从数据库中获取的密码$hash

if(password_verify($pass, $hash)) {
    echo 'Password is valid!';
} else {
    echo 'Invalid password.';
}

更新并尝试该程序

Answer 2

对于简单的应用程序，您可以使用 base64_encode() 在输入新密码时将其加密并存储到数据库中。并且对于登录还加密输入的密码并将其与数据库匹配。

您的代码：

if (count($_POST) > 0) 
{
$result = mysqli_query($conn, "SELECT *from users WHERE id='" .     $_SESSION["id"] . "'");
    $row = mysqli_fetch_array($result);
    $entered_password = base64_encode($_POST["currentPassword"]);
    $new_password = base64_encode($_POST["newPassword"]);
    $id =  $_SESSION["id"] ;
    if ($entered_password  == $row["password"]))) {

        $result = mysqli_query($conn, "UPDATE users set password='" . $new_password . "' WHERE id='" .$id. "'");
        $message = "Password Changed";
    } else
        $message = "Current Password is not correct";
}

这是一种简单的方法。

Answer 3

//password encryption

$user_password = "1234";
$hash_pass = password_encryption($user_password, PASSWORD_BCRYPT, array('cost'=>10);

//"$user_password"-password obtained from the user input
//"$hash_pass" -encrypted password stored in a database

//verify the user password with that obtained from the database

if(password_verify($user_password, $hash_pass)){
     echo "password is valid";
}else{
     echo "password is not valid";
}

试试这个。

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