我非常想知道如何在以下代码中添加随机盐，我一直在寻找互联网，但我还没想到它，至少不是“PDO方式”（如果它甚至有所作为）？
无论如何，我有这段代码：
的login.php：
<html>
<head>
<link type="text/css" rel="stylesheet" href="css/style.css" />
</head>
<body>
<div id="loginForm">
<?php
// form is submitted, check if acess will be granted
if($_POST){
try{
// load database connection and password hasher library
require 'libs/DbConnect.php';
require 'libs/PasswordHash.php';
// prepare query
$query = "select email, password from users where email = ? limit 0,1";
$stmt = $con->prepare( $query );
// this will represent the first question mark
$stmt->bindParam(1, $_POST['email']);
// execute our query
$stmt->execute();
// count the rows returned
$num = $stmt->rowCount();
if($num==1){
//store retrieved row to a 'row' variable
$row = $stmt->fetch(PDO::FETCH_ASSOC);
// hashed password saved in the database
$storedPassword = $row['password'];
// salt and entered password by the user
$salt = "whatever";
$postedPassword = $_POST['password'];
$saltedPostedPassword = $salt . $postedPassword;
// instantiate PasswordHash to check if it is a valid password
$hasher = new PasswordHash(8,false);
$check = $hasher->CheckPassword($saltedPostedPassword, $storedPassword);
/*
* access granted, for the next steps,
* you may use my php login script with php sessions tutorial :)
*/
if($check){
echo "<div>Access granted.</div>";
}
// $check variable is false, access denied.
else{
echo "<div>Access denied. <a href='login.php'>Back.</a></div>";
}
}
// no rows returned, access denied
else{
echo "<div>Access denied. <a href='login.php'>Back.</a></div>";
}
}
//to handle error
catch(PDOException $exception){
echo "Error: " . $exception->getMessage();
}
}
// show the registration form
else{
?>
<!--
-where the user will enter his email and password
-required during login
-we are using HTML5 'email' type, 'required' keyword for a some validation, and a 'placeholder' for better UI
-->
<form action="login.php" method="post">
<div id="formHeader">Website Login</div>
<div id="formBody">
<div class="formField">
<input type="email" name="email" required placeholder="Email" />
</div>
<div class="formField">
<input type="password" name="password" required placeholder="Password" />
</div>
<div>
<input type="submit" value="Login" class="customButton" />
</div>
</div>
<div id='userNotes'>
New here? <a href='register.php'>Register for free</a>
</div>
</form>
<?php
}
?>
</div>
</body>
</html>
register.php
<html>
<head>
<link type="text/css" rel="stylesheet" href="css/style.css" />
</head>
<body>
<div id="loginForm">
<?php
// save the username and password
if($_POST){
try{
// load database connection and password hasher library
require 'libs/DbConnect.php';
require 'libs/PasswordHash.php';
/*
* -prepare password to be saved
* -concatinate the salt and entered password
*/
$salt="whatever";
$password = $salt . $_POST['password'];
/*
* '8' - base-2 logarithm of the iteration count used for password stretching
* 'false' - do we require the hashes to be portable to older systems (less secure)?
*/
$hasher = new PasswordHash(8,false);
$password = $hasher->HashPassword($password);
// insert command
$query = "INSERT INTO users SET email = ?, password = ?";
$stmt = $con->prepare($query);
$stmt->bindParam(1, $_POST['email']);
$stmt->bindParam(2, $password);
// execute the query
if($stmt->execute()){
echo "<div>Successful registration.</div>";
}else{
echo "<div>Unable to register. <a href='register.php'>Please try again.</a></div>";
}
}
//to handle error
catch(PDOException $exception){
echo "Error: " . $exception->getMessage();
}
}
// show the registration form
else{
?>
<!--
-where the user will enter his email and password
-required during registration
-we are using HTML5 'email' type, 'required' keyword for a some validation, and a 'placeholder' for better UI
-->
<form action="register.php" method="post">
<div id="formHeader">Registration Form</div>
<div id="formBody">
<div class="formField">
<input type="email" name="email" required placeholder="Email" />
</div>
<div class="formField">
<input type="password" name="password" required placeholder="Password" />
</div>
<div>
<input type="submit" value="Register" class="customButton" />
</div>
<div id='userNotes'>
Already have an account? <a href='login.php'>Login</a>
</div>
</div>
</form>
<?php
}
?>
</div>
</body>
</html>
现在，如何创建随机生成的盐？