<分区>
我想知道是什么让用户入侵了我的网站，他们更改了我的用户名、个人信息和密码。有人可以给我一些建议吗？我正在使用 PHP MySQL 和 HTMLPURIFIER。
这是登录脚本。
<?php
if (isset($_POST['submitted'])) { // start of submit conditional.
require_once (MYSQL);
// Validate the username or email address:
if (!empty($_POST['login']) && strlen($_POST['login']) <= 255) {
$e = mysqli_real_escape_string($dbc, $purifier->purify(strip_tags($_POST['login'])));
} else if(!empty($_POST['login']) && strlen($_POST['login']) >= 256) {
$e = FALSE;
echo '<p>Your username or email address cannot exceed 255 characters!</p>';
} else {
$e = FALSE;
echo '<p>You forgot to enter your username or email address!</p>';
}
// Validate the password:
if (!empty($_POST['pass']) && strlen($_POST['pass']) <= 255) {
$p = mysqli_real_escape_string($dbc, $_POST['pass']);
} else if(!empty($_POST['pass']) && strlen($_POST['pass']) >= 256) {
$p = FALSE;
echo '<p>Your password cannot exceed 255 characters!</p>';
} else {
$p = FALSE;
echo '<p>You forgot to enter your password!</p>';
}
if(($e != FALSE) && ($p != FALSE)) { // check pass
$pass_salt = "SELECT users.password, users.salt FROM users JOIN contact_info ON contact_info.user_id = users.user_id WHERE (contact_info.email = '" . $e . "' OR users.username = '" . $e . "') AND users.active IS NULL";
$ph = mysqli_query($dbc, $pass_salt) or trigger_error("Query: $pass_salt\n<br />MySQL Error: " . mysqli_error($dbc));
while($row = mysqli_fetch_array($ph)){
$password = $row['password'];
$salt = $row['salt'];
}
if(!empty($salt)) {
$sha512 = hash('sha512', $p . $salt);
}
if(!empty($password) == !empty($sha512)){
$user_pass = TRUE;
} else {
$user_pass = FALSE;
}
}
if(isset($user_pass) && ($user_pass == TRUE) && !empty($salt)) { // If everything's OK.
// Query the database:
$q = "SELECT users.user_id, users.first_name, users.user_level FROM users JOIN contact_info ON contact_info.user_id = users.user_id WHERE (contact_info.email = '" . $e . "' OR users.username = '" . $e . "') AND users.password = '" . $sha512 . "' AND users.active IS NULL";
$r = mysqli_query ($dbc, $q) or trigger_error("Query: $q\n<br />MySQL Error: " . mysqli_error($dbc));
if (@mysqli_num_rows($r) == 1) { // A match was made.
// Register the values & redirect:
$_SESSION = mysqli_fetch_array ($r, MYSQLI_ASSOC);
// check if user is logged in then update the old login date
$u = "UPDATE users JOIN contact_info ON contact_info.user_id = users.user_id SET users.last_login = NOW(), users.deletion = 0, users.deletion_date = NULL WHERE (contact_info.email = '" . $e . "' OR users.username = '" . $e . "') AND users.password = '" . $sha512 . "' AND users.active IS NULL";
// save the info to the database
$r = mysqli_query ($dbc, $u);
mysqli_free_result($r);
mysqli_close($dbc);
$url = BASE_URL . 'home/index.php'; // Define the URL:
header("Location: $url");
exit(); // Quit the script.
} else { // No match was made.
echo '<p>Either your username, email address or password entered do not match those on file or you have not yet activated your account.</p>';
}
} else { // If everything wasn't OK.
echo '<p>Please try again.</p>';
}
mysqli_close($dbc);
} // end of submit conditional.
?>