135 lines
3.7 KiB
PHP
135 lines
3.7 KiB
PHP
<?php
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namespace Shaarli;
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/**
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* User login management
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*/
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class LoginManager
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{
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protected $globals = [];
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protected $configManager = null;
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protected $banFile = '';
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/**
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* Constructor
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*
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* @param array $globals The $GLOBALS array (reference)
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* @param ConfigManager $configManager Configuration Manager instance.
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*/
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public function __construct(& $globals, $configManager)
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{
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$this->globals = &$globals;
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$this->configManager = $configManager;
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$this->banFile = $this->configManager->get('resource.ban_file', 'data/ipbans.php');
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$this->readBanFile();
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}
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/**
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* Read a file containing banned IPs
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*/
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protected function readBanFile()
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{
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if (! file_exists($this->banFile)) {
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return;
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}
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include $this->banFile;
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}
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/**
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* Write the banned IPs to a file
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*/
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protected function writeBanFile()
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{
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if (! array_key_exists('IPBANS', $this->globals)) {
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return;
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}
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file_put_contents(
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$this->banFile,
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"<?php\n\$GLOBALS['IPBANS']=" . var_export($this->globals['IPBANS'], true) . ";\n?>"
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);
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}
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/**
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* Handle a failed login and ban the IP after too many failed attempts
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*
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* @param array $server The $_SERVER array
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*/
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public function handleFailedLogin($server)
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{
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$ip = $server['REMOTE_ADDR'];
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$trusted = $this->configManager->get('security.trusted_proxies', []);
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if (in_array($ip, $trusted)) {
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$ip = getIpAddressFromProxy($server, $trusted);
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if (! $ip) {
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// the IP is behind a trusted forward proxy, but is not forwarded
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// in the HTTP headers, so we do nothing
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return;
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}
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}
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// increment the fail count for this IP
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if (isset($this->globals['IPBANS']['FAILURES'][$ip])) {
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$this->globals['IPBANS']['FAILURES'][$ip]++;
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} else {
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$this->globals['IPBANS']['FAILURES'][$ip] = 1;
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}
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if ($this->globals['IPBANS']['FAILURES'][$ip] >= $this->configManager->get('security.ban_after')) {
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$this->globals['IPBANS']['BANS'][$ip] = time() + $this->configManager->get('security.ban_duration', 1800);
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logm(
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$this->configManager->get('resource.log'),
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$server['REMOTE_ADDR'],
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'IP address banned from login'
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);
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}
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$this->writeBanFile();
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}
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/**
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* Handle a successful login
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*
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* @param array $server The $_SERVER array
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*/
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public function handleSuccessfulLogin($server)
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{
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$ip = $server['REMOTE_ADDR'];
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// FIXME unban when behind a trusted proxy?
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unset($this->globals['IPBANS']['FAILURES'][$ip]);
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unset($this->globals['IPBANS']['BANS'][$ip]);
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$this->writeBanFile();
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}
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/**
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* Check if the user can login from this IP
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*
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* @param array $server The $_SERVER array
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*
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* @return bool true if the user is allowed to login
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*/
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public function canLogin($server)
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{
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$ip = $server['REMOTE_ADDR'];
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if (! isset($this->globals['IPBANS']['BANS'][$ip])) {
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// the user is not banned
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return true;
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}
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if ($this->globals['IPBANS']['BANS'][$ip] > time()) {
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// the user is still banned
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return false;
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}
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// the ban has expired, the user can attempt to log in again
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logm($this->configManager->get('resource.log'), $server['REMOTE_ADDR'], 'Ban lifted.');
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unset($this->globals['IPBANS']['FAILURES'][$ip]);
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unset($this->globals['IPBANS']['BANS'][$ip]);
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$this->writeBanFile();
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return true;
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}
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}
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