97 lines
3.5 KiB
PHP
97 lines
3.5 KiB
PHP
|
<?php
|
||
|
|
|
||
|
|
if( isset( $_POST[ 'Login' ] ) ) {
|
||
|
|
// Check Anti-CSRF token
|
||
|
|
checkToken( $_REQUEST[ 'user_token' ], $_SESSION[ 'session_token' ], 'index.php' );
|
||
|
|
|
||
|
|
// Sanitise username input
|
||
|
|
$user = $_POST[ 'username' ];
|
||
|
|
$user = stripslashes( $user );
|
||
|
|
$user = mysql_real_escape_string( $user );
|
||
|
|
|
||
|
|
// Sanitise password input
|
||
|
|
$pass = $_POST[ 'password' ];
|
||
|
|
$pass = stripslashes( $pass );
|
||
|
|
$pass = mysql_real_escape_string( $pass );
|
||
|
|
$pass = md5( $pass );
|
||
|
|
|
||
|
|
// Default values
|
||
|
|
$total_failed_login = 3;
|
||
|
|
$lockout_time = 15;
|
||
|
|
$account_locked = false;
|
||
|
|
|
||
|
|
// Check the database (Check user information)
|
||
|
|
$data = $db->prepare( 'SELECT failed_login, last_login FROM users WHERE user = (:user) LIMIT 1;' );
|
||
|
|
$data->bindParam( ':user', $user, PDO::PARAM_STR );
|
||
|
|
$data->execute();
|
||
|
|
$row = $data->fetch();
|
||
|
|
|
||
|
|
// Check to see if the user has been locked out.
|
||
|
|
if( ( $data->rowCount() == 1 ) && ( $row[ 'failed_login' ] >= $total_failed_login ) ) {
|
||
|
|
// User locked out. Note, using this method would allow for user enumeration!
|
||
|
|
//$html .= "<pre><br />This account has been locked due to too many incorrect logins.</pre>";
|
||
|
|
|
||
|
|
// Calculate when the user would be allowed to login again
|
||
|
|
$last_login = $row[ 'last_login' ];
|
||
|
|
$last_login = strtotime( $last_login );
|
||
|
|
$timeout = strtotime( "{$last_login} +{$lockout_time} minutes" );
|
||
|
|
$timenow = strtotime( "now" );
|
||
|
|
|
||
|
|
// Check to see if enough time has passed, if it hasn't locked the account
|
||
|
|
if( $timenow > $timeout )
|
||
|
|
$account_locked = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Check the database (if username matches the password)
|
||
|
|
$data = $db->prepare( 'SELECT * FROM users WHERE user = (:user) AND password = (:password) LIMIT 1;' );
|
||
|
|
$data->bindParam( ':user', $user, PDO::PARAM_STR);
|
||
|
|
$data->bindParam( ':password', $pass, PDO::PARAM_STR );
|
||
|
|
$data->execute();
|
||
|
|
$row = $data->fetch();
|
||
|
|
|
||
|
|
// If its a valid login...
|
||
|
|
if( ( $data->rowCount() == 1 ) && ( $account_locked == false ) ) {
|
||
|
|
// Get users details
|
||
|
|
$avatar = $row[ 'avatar' ];
|
||
|
|
$failed_login = $row[ 'failed_login' ];
|
||
|
|
$last_login = $row[ 'last_login' ];
|
||
|
|
|
||
|
|
// Login successful
|
||
|
|
$html .= "<p>Welcome to the password protected area <em>{$user}</em></p>";
|
||
|
|
$html .= "<img src=\"{$avatar}\" />";
|
||
|
|
|
||
|
|
// Had the account been locked out since last login?
|
||
|
|
if( $failed_login >= $total_failed_login ) {
|
||
|
|
$html .= "<p><em>Warning</em>: Someone might of been brute forcing your account.</p>";
|
||
|
|
$html .= "<p>Number of login attempts: <em>{$failed_login}</em>.<br />Last login attempt was at: <em>${last_login}</em>.</p>";
|
||
|
|
}
|
||
|
|
|
||
|
|
// Reset bad login count
|
||
|
|
$data = $db->prepare( 'UPDATE users SET failed_login = "0" WHERE user = (:user) LIMIT 1;' );
|
||
|
|
$data->bindParam( ':user', $user, PDO::PARAM_STR );
|
||
|
|
$data->execute();
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
// Login failed
|
||
|
|
sleep( rand( 2, 4 ) );
|
||
|
|
|
||
|
|
// Give the user some feedback
|
||
|
|
$html .= "<pre><br />Username and/or password incorrect.<br /><br/>Alternative, the account has been locked because of too many failed logins.<br />If this is the case, <em>please try again in {$lockout_time} minutes</em>.</pre>";
|
||
|
|
|
||
|
|
// Update bad login count
|
||
|
|
$data = $db->prepare( 'UPDATE users SET failed_login = (failed_login + 1) WHERE user = (:user) LIMIT 1;' );
|
||
|
|
$data->bindParam( ':user', $user, PDO::PARAM_STR );
|
||
|
|
$data->execute();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Set the last login time
|
||
|
|
$data = $db->prepare( 'UPDATE users SET last_login = now() WHERE user = (:user) LIMIT 1;' );
|
||
|
|
$data->bindParam( ':user', $user, PDO::PARAM_STR );
|
||
|
|
$data->execute();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Generate Anti-CSRF token
|
||
|
|
generateSessionToken();
|
||
|
|
|
||
|
|
?>
|