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