mirror of
https://github.com/snipe/snipe-it.git
synced 2024-12-26 14:09:43 -08:00
284 lines
11 KiB
PHP
284 lines
11 KiB
PHP
<?php
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namespace App\Console\Commands;
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use Illuminate\Console\Command;
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use App\Models\Setting;
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use Exception;
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/**
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* Check if a given ip is in a network
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* @param string $ip IP to check in IPV4 format eg. 127.0.0.1
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* @param string $range IP/CIDR netmask eg. 127.0.0.0/24, also 127.0.0.1 is accepted and /32 assumed
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* @return boolean true if the ip is in this range / false if not.
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*/
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function ip_in_range( $ip, $range ) {
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if ( strpos( $range, '/' ) == false ) {
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$range .= '/32';
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}
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// $range is in IP/CIDR format eg 127.0.0.1/24
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list( $range, $netmask ) = explode( '/', $range, 2 );
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$range_decimal = ip2long( $range );
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$ip_decimal = ip2long( $ip );
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$wildcard_decimal = pow( 2, ( 32 - $netmask ) ) - 1;
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$netmask_decimal = ~ $wildcard_decimal;
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return ( ( $ip_decimal & $netmask_decimal ) == ( $range_decimal & $netmask_decimal ) );
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}
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// NOTE - this function was shamelessly stolen from this gist: https://gist.github.com/tott/7684443
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class LdapTroubleshooter extends Command
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{
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/**
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* The name and signature of the console command.
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*
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* @var string
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*/
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protected $signature = 'ldap:troubleshoot
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{--force : Skip the interactive yes/no prompt for confirmation}';
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/**
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* The console command description.
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*
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* @var string
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*/
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protected $description = 'Runs a series of non-destructive LDAP commands to help try and determine correct LDAP settings for your environment.';
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/**
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* Create a new command instance.
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*
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* @return void
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*/
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public function __construct()
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{
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parent::__construct();
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}
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/**
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* Execute the console command.
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*
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* @return mixed
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*/
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public function handle()
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{
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if(!$this->option('force')) {
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$confirmation = $this->confirm('WARNING: This command will make several attempts to connect to your LDAP server. Are you sure this is ok? (y/n)');
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if(!$confirmation) {
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$this->error('ABORTING');
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exit(-1);
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}
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}
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$settings = Setting::getSettings();
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//$this->line(print_r($settings,true));
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$this->info("STAGE 1: Checking settings");
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if(!$settings->ldap_enabled) {
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$this->error("WARNING: Snipe-IT's LDAP setting is not turned on. (That may be OK if you're still trying to figure out settings)");
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}
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$ldap_conn = false;
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try {
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$ldap_conn = ldap_connect($settings->ldap_server);
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} catch (Exception $e) {
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$this->error("WARNING: Exception caught when executing 'ldap_connect()' - ".$e->getMessage().". We will try to guess.");
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}
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if(!$ldap_conn) {
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$this->error("WARNING: LDAP Server setting of: ".$settings->ldap_server." cannot be parsed. We will try to guess.");
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//exit(-1);
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}
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$parsed = parse_url($settings->ldap_server);
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if(@$parsed['scheme'] != 'ldap' && @$parsed['scheme'] != 'ldaps') {
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$this->error("WARNING: LDAP URL Scheme of '".@$parsed['scheme']."' is probably incorrect; should usually be ldap or ldaps");
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}
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if(!@$parsed['host']) {
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$this->error("ERROR: Cannot determine hostname or IP from ldap URL: ".$settings->ldap_server.". ABORTING.");
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exit(-1);
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} else {
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$this->info("Determined LDAP hostname to be: ".$parsed['host']);
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}
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$this->info("Performing DNS lookup of: ".$parsed['host']);
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$ips = dns_get_record($parsed['host']);
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$raw_ips = [];
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//$this->info("Host IP is: ".print_r($ips,true));
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if(!$ips || count($ips) == 0) {
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$this->error("ERROR: DNS lookup of host: ".$parsed['host']." has failed. ABORTING.");
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exit(-1);
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}
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$this->info("IP's? ".print_r($ips,true));
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foreach($ips as $ip) {
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if(!isset($ip['ip'])) {
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continue;
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}
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$raw_ips[]=$ip['ip'];
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if($ip['ip'] == "127.0.0.1") {
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$this->error("WARNING: Using the localhost IP as the LDAP server. This is usually wrong");
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}
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if(ip_in_range($ip['ip'],'10.0.0.0/8') || ip_in_range($ip['ip'],'192.168.0.0/16') || ip_in_range($ip['ip'], '172.16.0.0/12')) {
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$this->error("WARNING: Using an RFC1918 Private address for LDAP server. This may be correct, but it can be a problem if your Snipe-IT instance is not hosted on your private network");
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}
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}
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$this->info("STAGE 2: Checking basic network connectivity");
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$ports = [389,636];
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if(@$parsed['port'] && !in_array($parsed['port'],$ports)) {
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$ports[] = $parsed['port'];
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}
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$open_ports=[];
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foreach($ports as $port ) {
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$errno = 0;
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$errstr = '';
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$timeout = 30.0;
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$result = '';
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$this->info("Attempting to connect to port: ".$port." - may take up to $timeout seconds");
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try {
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$result = fsockopen($parsed['host'], $port, $errno, $errstr, 30.0);
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} catch(Exception $e) {
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$this->error("Exception: ".$e->getMessage());
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}
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if($result) {
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$this->info("Success!");
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$open_ports[] = $port;
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} else {
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$this->error("WARNING: Cannot connect to port: $port - $errstr ($errno)");
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}
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}
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if(count($open_ports) == 0) {
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$this->error("ERROR - no open ports. ABORTING.");
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exit(-1);
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}
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$this->info("STAGE 3: Determine encryption algorithm, if any");
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$ldap_urls = [];
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$pretty_ldap_urls = [];
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foreach($open_ports as $port) {
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$this->line("Trying TLS first for port $port");
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$ldap_url = "ldaps://".$parsed['host'].":$port";
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if($this->test_anonymous_bind($ldap_url)) {
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$this->info("Anonymous bind succesful to $ldap_url!");
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$ldap_urls[] = [ $ldap_url, true, false ];
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$pretty_ldap_urls[] = [ $ldap_url, "YES", "no" ];
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continue; // TODO - lots of copypasta in these if(test_anonymous_bind()) routines...
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} else {
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$this->error("WARNING: Failed to bind to $ldap_url - trying without certificate checks.");
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}
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if($this->test_anonymous_bind($ldap_url, false)) {
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$this->info("Anonymous bind succesful to $ldap_url with certifcate-checks disabled");
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$ldap_urls[] = [ $ldap_url, false, false ];
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$pretty_ldap_urls[] = [ $ldap_url, "no", "no" ];
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continue;
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} else {
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$this->error("WARNING: Failed to bind to $ldap_url with certificate checks disabled. Trying unencrypted with STARTTLS");
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}
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$ldap_url = "ldap://".$parsed['host'].":$port";
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if($this->test_anonymous_bind($ldap_url, true, true)) {
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$this->info("Plain connection to $ldap_url with STARTTLS succesful!");
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$ldap_urls[] = [ $ldap_url, true, false ];
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$pretty_ldap_urls[] = [ $ldap_url, "YES", "no" ];
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continue;
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} else {
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$this->error("WARNING: Failed to bind to $ldap_url with STARTTLS enabled. Trying without STARTTLS");
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}
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if($this->test_anonymous_bind($ldap_url)) {
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$this->info("Plain connection to $ldap_url succesful!");
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$ldap_urls[] = [ $ldap_url, true, false ];
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$pretty_ldap_urls[] = [ $ldap_url, "YES", false ];
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continue;
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} else {
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$this->error("WARNING: Failed to bind to $ldap_url. Giving up on port $port");
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}
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}
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$this->info(print_r($ldap_urls,true));
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if(count($ldap_urls) > 0 ) {
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$this->info("Found working LDAP URL's: ");
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foreach($ldap_urls as $ldap_url) { // TODO maybe do this as a $this->table() instead?
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$this->info("LDAP URL: ".$ldap_url[0]);
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$this->info($ldap_url[0]. ($ldap_url[1] ? " certificate checks enabled" : " certificate checks disabled"). $ldap_url[2] ? " STARTTLS Enabled ": " STARTTLS Disabled");
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}
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$this->table(["URL", "Cert Checks Enabled?", "STARTTLS Enabled?"],$pretty_ldap_urls);
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} else {
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$this->error("ERROR - no valid LDAP URL's available - ABORTING");
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}
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$this->info("STAGE 4: Test Administrative Bind for LDAP Sync");
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foreach($ldap_urls AS $ldap_url) {
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$this->test_authed_bind($ldap_url[0], $ldap_url[1], $ldap_url[2], $settings->ldap_uname, \Crypt::decrypt($settings->ldap_pword));
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}
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$this->info("STAGE 5: Test LDAP Login to Snipe-IT");
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foreach($ldap_urls AS $ldap_url) {
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$this->info("Starting auth to ".$ldap_url[0]);
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while(true) {
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if(!$this->confirm('Do you wish to try to authenticate to the directory?')) {
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break;
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}
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$username = $this->ask("Username");
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$password = $this->secret("Password");
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$this->test_authed_bind($ldap_url[0], $ldap_url[1], $ldap_url[2], $username, $password);
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}
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}
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$this->info("LDAP TROUBLESHOOTING COMPLETE!");
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}
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public function connect_to_ldap($ldap_url, $check_cert, $start_tls)
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{
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$lconn = ldap_connect($ldap_url);
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ldap_set_option($lconn,LDAP_OPT_PROTOCOL_VERSION,3); // should we 'test' different protocol versions here? Does anyone even use anything other than LDAPv3?
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// no - it's formally deprecated: https://tools.ietf.org/html/rfc3494
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if(!$check_cert) {
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ldap_set_option($lconn, LDAP_OPT_X_TLS_REQUIRE_CERT, 0);
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}
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if($start_tls) {
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if(!ldap_start_tls($lconn)) {
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$this->error("WARNING: Unable to start TLS");
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return false;
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}
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}
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if(!$lconn) {
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$this->error("WARNING: Failed to generate connection string - using: ".$ldap_url);
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return false;
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}
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return $lconn;
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}
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public function test_anonymous_bind($ldap_url, $check_cert = true, $start_tls = false)
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{
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try {
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$lconn = $this->connect_to_ldap($ldap_url,$check_cert,$start_tls);
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return ldap_bind($lconn);
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} catch (Exception $e) {
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$this->error("WARNING: Exception caught during bind - ".$e->getMessage());
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return false;
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}
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}
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public function test_authed_bind($ldap_url, $check_cert, $start_tls, $username, $password)
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{
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try {
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$lconn = $this->connect_to_ldap($ldap_url,$check_cert,$start_tls);
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$bind_results = ldap_bind($lconn,$username,$password);
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if(!$bind_results) {
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$this->error("WARNING: Failed to bind to $ldap_url as $username");
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} else {
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$this->info("SUCCESS - Able to bind to $ldap_url as $username");
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}
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return $bind_results;
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} catch (Exception $e) {
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$this->error("WARNING: Exception caught during Admin bind - ".$e->getMessage());
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}
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}
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}
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