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https://github.com/snipe/snipe-it.git
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Merge pull request #10033 from uberbrady/ldap_troubleshooter_cherrypicked
Fixed [ch14855] - create LDAP troubleshooter
This commit is contained in:
snipe
GitHub
commit
9311584f43
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@ -41,6 +41,7 @@ libmcrypt-dev \
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php7.4-dev \
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ca-certificates \
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unzip \
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dnsutils \
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&& rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
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503
app/Console/Commands/LdapTroubleshooter.php
Normal file
503
app/Console/Commands/LdapTroubleshooter.php
Normal file
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@ -0,0 +1,503 @@
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<?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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use Crypt;
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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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{--ldap-search : Output an ldapsearch command-line for testing your LDAP config}
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{--force : Skip the interactive yes/no prompt for confirmation}
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{--debug : Include debugging output (verbose)}
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{--trace : Include extremely verbose LDAP trace output}
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{--timeout=15 : Timeout for LDAP Bind operations}';
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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 $description = 'Runs a series of non-destructive LDAP commands to help try and determine correct LDAP settings for your environment.';
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/**
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* Create a new command instance.
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*
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* @return void
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*/
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public function __construct()
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{
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parent::__construct();
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}
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/**
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* Output something *only* if debug is enabled
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*
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* @return void
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*/
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public function debugout($string)
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{
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if($this->option('debug')) {
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$this->line($string);
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}
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}
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/**
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* Execute the console command.
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*
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* @return mixed
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*/
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public function handle()
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{
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if($this->option('trace')) {
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ldap_set_option(NULL, LDAP_OPT_DEBUG_LEVEL, 7);
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}
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$settings = Setting::getSettings();
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$this->settings = $settings;
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if($this->option('ldap-search')) {
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if(!$this->option('force')) {
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$confirmation = $this->confirm('WARNING: This command will display your LDAP password on your terminal. Are you sure this is ok?');
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if(!$confirmation) {
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$this->error('ABORTING');
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exit(-1);
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}
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}
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$output = [];
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if($settings->ldap_server_cert_ignore) {
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$this->line("# Ignoring server certificate validity");
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$output[] = "LDAPTLS_REQCERT=never";
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}
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if($settings->ldap_client_tls_cert && $settings->ldap_client_tls_key) {
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$this->line("# Adding LDAP Client Certificate and Key");
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$output[] = "LDAPTLS_CERT=storage/ldap_client_tls.cert";
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$output[] = "LDAPTLS_KEY=storage/ldap_client_tls.key";
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}
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$output[] = "ldapsearch";
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$output[] = $settings->ldap_server;
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$output[] = "-x";
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$output[] = "-b ".escapeshellarg($settings->ldap_basedn);
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$output[] = "-D ".escapeshellarg($settings->ldap_uname);
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$output[] = "-w ".escapeshellarg(\Crypt::Decrypt($settings->ldap_pword));
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if(substr($settings->ldap_filter,0,1) == "(" ) {
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$output[] = escapeshellarg($settings->ldap_filter);
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} else {
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$output[] = escapeshellarg("(".$settings->ldap_filter.")");
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}
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if($settings->ldap_tls) {
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$this->line("# adding STARTTLS option");
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$output[] = "-Z";
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}
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$output[] = "-v";
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$this->line("\n");
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$this->line(implode(" \\\n",$output));
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exit(0);
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}
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if(!$this->option('force')) {
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$confirmation = $this->confirm('WARNING: This command will make several attempts to connect to your LDAP server. Are you sure this is ok?');
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if(!$confirmation) {
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$this->error('ABORTING');
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exit(-1);
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}
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}
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//$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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//since we never use $ldap_conn again, we don't have to ldap_unbind() it (it's not even connected, tbh - that only happens at bind-time)
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$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->debugout("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[] = [ $ldap_url, true, true ];
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$pretty_ldap_urls[] = [ $ldap_url, "YES", "YES" ];
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continue;
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} else {
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$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[] = [ $ldap_url, "YES", "no" ];
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continue;
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} else {
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$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->debugout(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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exit(1);
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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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$this->info("STAGE 5: Test BaseDN");
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//grab all LDAP_ constants and fill up a reversed array mapping from weird LDAP dotted-strings to (Constant Name)
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$all_defined_constants = get_defined_constants();
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$ldap_constants = [];
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foreach($all_defined_constants AS $key => $val) {
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if(starts_with($key,"LDAP_") && is_string($val)) {
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$ldap_constants[$val] = $key; // INVERT the meaning here!
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}
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}
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$this->debugout("LDAP constants are: ".print_r($ldap_constants,true));
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// recursive function that 'cleans' the returned array from ldap_get_entries which are formatted awfully
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$cleaner = function ($array) {
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$cleaned = [];
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for($i = 0; $i < $array['count']; $i++) {
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$row = $array[$i];
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$clean_row = [];
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foreach($row AS $key => $val ) {
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$this->debugout("Key is: ".$key);
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if($key == "count" || is_int($key) || $key == "dn") {
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$this->debugout(" and we're gonna skip it\n");
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continue;
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}
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$this->debugout(" And that seems fine.\n");
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if(array_key_exists('count',$val)) {
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if($val['count'] == 1) {
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$clean_row[$key] = $val[0];
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} else {
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unset($val['count']); //these counts are annoying
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$elements = [];
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foreach($val as $entry) {
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if(isset($ldap_constants[$entry])) {
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$elements[] = $ldap_constants[$entry];
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} else {
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$elements[] = $entry;
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}
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}
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$clean_row[$key] = $elements;
|
||||
}
|
||||
} else {
|
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$clean_row[$key] = $val;
|
||||
}
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||||
}
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$cleaned[$i] = $clean_row;
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}
|
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return $cleaned;
|
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};
|
||||
|
||||
foreach($ldap_urls AS $ldap_url) {
|
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if($this->test_informational_bind($ldap_url[0],$ldap_url[1],$ldap_url[2],$settings->ldap_uname,Crypt::decrypt($settings->ldap_pword))) {
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$this->info("Success getting informational bind!");
|
||||
} else {
|
||||
$this->error("Unable to get information from bind.");
|
||||
}
|
||||
}
|
||||
|
||||
$this->info("STAGE 6: Test LDAP Login to Snipe-IT");
|
||||
foreach($ldap_urls AS $ldap_url) {
|
||||
$this->info("Starting auth to ".$ldap_url[0]);
|
||||
while(true) {
|
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$with_tls = $ldap_url[1] ? "with": "without";
|
||||
$with_startssl = $ldap_url[2] ? "using": "not using";
|
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if(!$this->confirm('Do you wish to try to authenticate to this directory: '.$ldap_url[0]." $with_tls TLS and $with_startssl STARTSSL?")) {
|
||||
break;
|
||||
}
|
||||
$username = $this->ask("Username");
|
||||
$password = $this->secret("Password");
|
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$this->test_authed_bind($ldap_url[0], $ldap_url[1], $ldap_url[2], $username, $password); // FIXME - should do some other stuff here, maybe with the concatenating or something? maybe? and/or should put up some results?
|
||||
}
|
||||
}
|
||||
|
||||
$this->info("LDAP TROUBLESHOOTING COMPLETE!");
|
||||
}
|
||||
|
||||
public function connect_to_ldap($ldap_url, $check_cert, $start_tls)
|
||||
{
|
||||
$lconn = ldap_connect($ldap_url);
|
||||
ldap_set_option($lconn, LDAP_OPT_PROTOCOL_VERSION, 3); // should we 'test' different protocol versions here? Does anyone even use anything other than LDAPv3?
|
||||
// no - it's formally deprecated: https://tools.ietf.org/html/rfc3494
|
||||
if(!$check_cert) {
|
||||
putenv('LDAPTLS_REQCERT=never'); // This is horrible; is this *really* the only way to do it?
|
||||
} else {
|
||||
putenv('LDAPTLS_REQCERT'); // have to very explicitly and manually *UN* set the env var here to ensure it works
|
||||
}
|
||||
if($this->settings->ldap_client_tls_cert && $this->settings->ldap_client_tls_key) {
|
||||
// client-side TLS certificate support for LDAP (Google Secure LDAP)
|
||||
putenv('LDAPTLS_CERT=storage/ldap_client_tls.cert');
|
||||
putenv('LDAPTLS_KEY=storage/ldap_client_tls.key');
|
||||
}
|
||||
if($start_tls) {
|
||||
if(!ldap_start_tls($lconn)) {
|
||||
$this->error("WARNING: Unable to start TLS");
|
||||
return false;
|
||||
}
|
||||
}
|
||||
if(!$lconn) {
|
||||
$this->error("WARNING: Failed to generate connection string - using: ".$ldap_url);
|
||||
return false;
|
||||
}
|
||||
$net = ldap_set_option($lconn, LDAP_OPT_NETWORK_TIMEOUT, $this->option('timeout'));
|
||||
$time = ldap_set_option($lconn, LDAP_OPT_TIMELIMIT, $this->option('timeout'));
|
||||
if(!$net || !$time) {
|
||||
$this->error("Unable to set timeouts!");
|
||||
}
|
||||
return $lconn;
|
||||
}
|
||||
|
||||
public function test_anonymous_bind($ldap_url, $check_cert = true, $start_tls = false)
|
||||
{
|
||||
return $this->timed_boolean_execute(function () use ($ldap_url, $check_cert , $start_tls) {
|
||||
try {
|
||||
$lconn = $this->connect_to_ldap($ldap_url, $check_cert, $start_tls);
|
||||
$this->info("gonna try to bind now, this can take a while if we mess it up");
|
||||
$bind_results = ldap_bind($lconn);
|
||||
$this->info("Bind results are: ".$bind_results." which translate into boolean: ".(bool)$bind_results);
|
||||
return (bool)$bind_results;
|
||||
} catch (Exception $e) {
|
||||
$this->error("WARNING: Exception caught during bind - ".$e->getMessage());
|
||||
return false;
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
public function test_authed_bind($ldap_url, $check_cert, $start_tls, $username, $password)
|
||||
{
|
||||
return $this->timed_boolean_execute(function () use ($ldap_url, $check_cert, $start_tls, $username, $password) {
|
||||
try {
|
||||
$lconn = $this->connect_to_ldap($ldap_url, $check_cert, $start_tls);
|
||||
$bind_results = ldap_bind($lconn, $username, $password);
|
||||
if(!$bind_results) {
|
||||
$this->error("WARNING: Failed to bind to $ldap_url as $username");
|
||||
return false;
|
||||
} else {
|
||||
$this->info("SUCCESS - Able to bind to $ldap_url as $username");
|
||||
return (bool)$lconn;
|
||||
}
|
||||
} catch (Exception $e) {
|
||||
$this->error("WARNING: Exception caught during Authed bind to $username - ".$e->getMessage());
|
||||
return false;
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
public function test_informational_bind($ldap_url, $check_cert, $start_tls, $username, $password)
|
||||
{
|
||||
return $this->timed_boolean_execute(function () use ($ldap_url, $check_cert, $start_tls, $username, $password) {
|
||||
try { // TODO - copypasta'ed from test_authed_bind
|
||||
$conn = $this->connect_to_ldap($ldap_url, $check_cert, $start_tls);
|
||||
$bind_results = ldap_bind($conn, $username, $password);
|
||||
if(!$bind_results) {
|
||||
$this->error("WARNING: Failed to bind to $ldap_url as $username");
|
||||
return false;
|
||||
}
|
||||
$this->info("SUCCESS - Able to bind to $ldap_url as $username");
|
||||
$result = ldap_read($conn, '', '(objectClass=*)'/* , ['supportedControl']*/);
|
||||
$results = ldap_get_entries($conn, $result);
|
||||
$cleaned_results = $cleaner($results);
|
||||
$this->line(print_r($cleaned_results,true));
|
||||
//okay, great - now how do we display those results? I have no idea.
|
||||
// I don't see why this throws an Exception for Google LDAP, but I guess we ought to try and catch it?
|
||||
$this->comment("I guess we're trying to do the ldap search here, but sometimes it takes too long?");
|
||||
$search_results = ldap_search($conn, $settings->base_dn, $settings->filter);
|
||||
$this->info("Printing first 10 results: ");
|
||||
for($i=0;$i<10;$i++) {
|
||||
$this->info($search_results[$i]);
|
||||
}
|
||||
} catch (\Exception $e) {
|
||||
$this->error("WARNING: Exception caught during Authed bind to $username - ".$e->getMessage());
|
||||
return false;
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
/***********************************************
|
||||
*
|
||||
* This function executes $function - which is expected to be some kind of executable function -
|
||||
* with a timeout set. It respects the timeout by forking execution and setting a strict timer
|
||||
* for which to get back a SIGUSR1 or SIGUSR2 signal from the forked process.
|
||||
*
|
||||
***********************************************/
|
||||
private function timed_boolean_execute($function)
|
||||
{
|
||||
if(!(function_exists('pcntl_sigtimedwait') && function_exists('posix_getpid') && function_exists('pcntl_fork') && function_exists('posix_kill') && function_exists('pcntl_wifsignaled'))) {
|
||||
// POSIX functions needed for forking aren't present, just run the function inline (ignoring timeout)
|
||||
$this->info('WARNING: Unable to execute POSIX fork() commands, timeout may not be respected');
|
||||
return $function();
|
||||
} else {
|
||||
$parent_pid = posix_getpid();
|
||||
$pid = pcntl_fork();
|
||||
switch($pid) {
|
||||
case 0:
|
||||
//we're the 'child'
|
||||
if($function()) {
|
||||
//SUCCESS = SIGUSR1
|
||||
posix_kill($parent_pid, SIGUSR1);
|
||||
} else {
|
||||
//FAILURE = SIGUSR2
|
||||
posix_kill($parent_pid, SIGUSR2);
|
||||
}
|
||||
exit();
|
||||
break; //yes I know we don't need it.
|
||||
case -1:
|
||||
//couldn't fork
|
||||
$this->error("COULD NOT FORK - assuming failure");
|
||||
return false;
|
||||
break; //I still know that we don't need it
|
||||
default:
|
||||
//we remain the 'parent', $pid is the PID of the forked process.
|
||||
$siginfo = [];
|
||||
$exit_status = pcntl_sigtimedwait ([SIGUSR1, SIGUSR2], $siginfo, $this->option('timeout'));
|
||||
if ($exit_status == SIGUSR1) {
|
||||
return true;
|
||||
} else {
|
||||
posix_kill($pid, SIGKILL); //make sure we don't have processes hanging around that might try and send signals during later executions, confusing us
|
||||
return false;
|
||||
}
|
||||
break; //Yeah I get it already, shush.
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
Loading…
Reference in a new issue