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Implement a generic timeout function, and run methods that need to run with a timeout using it.

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This commit is contained in:
Brady Wetherington 2021-09-01 17:30:03 -07:00
parent b96303cb38
commit 0556c7653a
1 changed files with 174 additions and 75 deletions
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249
app/Console/Commands/LdapTroubleshooter.php
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@ -5,6 +5,7 @@ namespace App\Console\Commands;
use Illuminate\Console\Command;
use App\Models\Setting;
use Exception;
use Crypt;
/**
* Check if a given ip is in a network
@ -36,7 +37,9 @@ class LdapTroubleshooter extends Command
protected $signature = 'ldap:troubleshoot
{--ldap-search : Output an ldapsearch command-line for testing your LDAP config}
{--force : Skip the interactive yes/no prompt for confirmation}
{--debug : Include debugging output (verbose)}';
{--debug : Include debugging output (verbose)}
{--trace : Include extremely verbose LDAP trace output}
{--timeout=15 : Timeout for LDAP Bind operations}';
/**
* The console command description.
@ -74,11 +77,12 @@ class LdapTroubleshooter extends Command
*/
public function handle()
{
if($this->option('debug')) {
if($this->option('trace')) {
ldap_set_option(NULL, LDAP_OPT_DEBUG_LEVEL, 7);
}
$settings = Setting::getSettings();
$this->settings = $settings;
if($this->option('ldap-search')) {
if(!$this->option('force')) {
$confirmation = $this->confirm('WARNING: This command will display your LDAP password on your terminal. Are you sure this is ok?');
@ -93,6 +97,7 @@ class LdapTroubleshooter extends Command
$output[] = "LDAPTLS_REQCERT=never";
}
if($settings->ldap_client_tls_cert && $settings->ldap_client_tls_key) {
$this->line("# Adding LDAP Client Certificate and Key");
$output[] = "LDAPTLS_CERT=storage/ldap_client_tls.cert";
$output[] = "LDAPTLS_KEY=storage/ldap_client_tls.key";
}
@ -140,6 +145,7 @@ class LdapTroubleshooter extends Command
$this->error("WARNING: LDAP Server setting of: ".$settings->ldap_server." cannot be parsed. We will try to guess.");
//exit(-1);
}
//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)
$parsed = parse_url($settings->ldap_server);
@ -214,6 +220,7 @@ class LdapTroubleshooter extends Command
$ldap_urls = [];
$pretty_ldap_urls = [];
foreach($open_ports as $port) {
//if($port == 389) { continue; } // FIXME GET RID OF THIS LINE! THIS SUCKS!!!!!!
$this->line("Trying TLS first for port $port");
$ldap_url = "ldaps://".$parsed['host'].":$port";
if($this->test_anonymous_bind($ldap_url)) {
@ -237,8 +244,8 @@ class LdapTroubleshooter extends Command
$ldap_url = "ldap://".$parsed['host'].":$port";
if($this->test_anonymous_bind($ldap_url, true, true)) {
$this->info("Plain connection to $ldap_url with STARTTLS succesful!");
$ldap_urls[] = [ $ldap_url, true, false ];
$pretty_ldap_urls[] = [ $ldap_url, "YES", "no" ];
$ldap_urls[] = [ $ldap_url, true, true ];
$pretty_ldap_urls[] = [ $ldap_url, "YES", "YES" ];
continue;
} else {
$this->error("WARNING: Failed to bind to $ldap_url with STARTTLS enabled. Trying without STARTTLS");
@ -265,68 +272,67 @@ class LdapTroubleshooter extends Command
$this->table(["URL", "Cert Checks Enabled?", "STARTTLS Enabled?"],$pretty_ldap_urls);
} else {
$this->error("ERROR - no valid LDAP URL's available - ABORTING");
exit(1);
}
$this->info("STAGE 4: Test Administrative Bind for LDAP Sync");
foreach($ldap_urls AS $ldap_url) {
$this->test_authed_bind($ldap_url[0], $ldap_url[1], $ldap_url[2], $settings->ldap_uname, \Crypt::decrypt($settings->ldap_pword));
$this->test_authed_bind($ldap_url[0], $ldap_url[1], $ldap_url[2], $settings->ldap_uname, Crypt::decrypt($settings->ldap_pword));
}
$this->info("STAGE 5: Test BaseDN");
foreach($ldap_urls AS $ldap_url) {
$conn = $this->test_authed_bind($ldap_url[0], $ldap_url[1], $ldap_url[2], $settings->ldap_uname, \Crypt::decrypt($settings->ldap_pword));
if($conn) {
$result = ldap_read($conn, '', '(objectClass=*)'/* , ['supportedControl']*/);
$results = ldap_get_entries($conn, $result);
$cleaner = function ($array) {
/*
*/
$all_defined_constants = get_defined_constants();
$ldap_constants = [];
foreach($all_defined_constants AS $key => $val) {
if(starts_with($key,"LDAP_") && is_string($val)) {
$ldap_constants[$val] = $key; // INVERT the meaning here!
}
}
$this->info("LDAP constants are: ".print_r($ldap_constants,true));
//grab all LDAP_ constants and fill up a reversed array mapping from weird LDAP dotted-strings to (Constant Name)
$all_defined_constants = get_defined_constants();
$ldap_constants = [];
foreach($all_defined_constants AS $key => $val) {
if(starts_with($key,"LDAP_") && is_string($val)) {
$ldap_constants[$val] = $key; // INVERT the meaning here!
}
}
$this->debugout("LDAP constants are: ".print_r($ldap_constants,true));
$cleaned = [];
for($i = 0; $i < $array['count']; $i++) {
$row = $array[$i];
$clean_row = [];
foreach($row AS $key => $val ) {
print("Key is: ".$key);
if($key == "count" || is_int($key) || $key == "dn") {
$this->debugout(" and we're gonna skip it\n");
continue;
}
$this->debugout(" And that seems fine.\n");
if(array_key_exists('count',$val)) {
if($val['count'] == 1) {
$clean_row[$key] = $val[0];
// recursive function that 'cleans' the returned array from ldap_get_entries which are formatted awfully
$cleaner = function ($array) {
$cleaned = [];
for($i = 0; $i < $array['count']; $i++) {
$row = $array[$i];
$clean_row = [];
foreach($row AS $key => $val ) {
$this->debugout("Key is: ".$key);
if($key == "count" || is_int($key) || $key == "dn") {
$this->debugout(" and we're gonna skip it\n");
continue;
}
$this->debugout(" And that seems fine.\n");
if(array_key_exists('count',$val)) {
if($val['count'] == 1) {
$clean_row[$key] = $val[0];
} else {
unset($val['count']); //these counts are annoying
$elements = [];
foreach($val as $entry) {
if(isset($ldap_constants[$entry])) {
$elements[] = $ldap_constants[$entry];
} else {
unset($val['count']); //these counts are annoying
$elements = [];
foreach($val as $entry) {
if(isset($ldap_constants[$entry])) {
$elements[] = $ldap_constants[$entry];
} else {
$elements[] = $entry;
}
}
$clean_row[$key] = $elements;
$elements[] = $entry;
}
} else {
$clean_row[$key] = $val;
}
$clean_row[$key] = $elements;
}
$cleaned[$i] = $clean_row;
} else {
$clean_row[$key] = $val;
}
return $cleaned;
};
$this->debugout(print_r($cleaner($results),true));
$search_results = ldap_search($conn,$settings->base_dn,$settings->filter);
}
$cleaned[$i] = $clean_row;
}
return $cleaned;
};
foreach($ldap_urls AS $ldap_url) {
if($this->test_informational_bind($ldap_url[0],$ldap_url[1],$ldap_url[2],$settings->ldap_uname,Crypt::decrypt($settings->ldap_pword))) {
$this->info("Success getting informational bind!");
} else {
$this->error("Unable to get information from bind.");
}
}
@ -334,19 +340,21 @@ class LdapTroubleshooter extends Command
foreach($ldap_urls AS $ldap_url) {
$this->info("Starting auth to ".$ldap_url[0]);
while(true) {
if(!$this->confirm('Do you wish to try to authenticate to the directory?')) {
$with_tls = $ldap_url[1] ? "with": "without";
$with_startssl = $ldap_url[2] ? "using": "not using";
if(!$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");
$this->test_authed_bind($ldap_url[0], $ldap_url[1], $ldap_url[2], $username, $password); // FIXME - should do some other stuff here, maybe with the concatenating or something?
$this->test_authed_bind($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, $settings)
public function connect_to_ldap($ldap_url, $check_cert, $start_tls)
{
$lconn = ldap_connect($ldap_url);
ldap_set_option($lconn, LDAP_OPT_PROTOCOL_VERSION, 3); // should we 'test' different protocol versions here? Does anyone even use anything other than LDAPv3?
@ -356,7 +364,7 @@ class LdapTroubleshooter extends Command
} else {
putenv('LDAPTLS_REQCERT'); // have to very explicitly and manually *UN* set the env var here to ensure it works
}
if($settings->ldap_client_tls_cert && $settings->ldap_client_tls_key) {
if($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');
@ -371,35 +379,126 @@ class LdapTroubleshooter extends Command
$this->error("WARNING: Failed to generate connection string - using: ".$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)
{
try {
$lconn = $this->connect_to_ldap($ldap_url,$check_cert,$start_tls);
return ldap_bind($lconn);
} catch (Exception $e) {
$this->error("WARNING: Exception caught during bind - ".$e->getMessage());
return 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)
{
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 $this->timed_boolean_execute(function () use ($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;
} else {
$this->info("SUCCESS - Able to bind to $ldap_url as $username");
return $lconn;
}
} catch (Exception $e) {
$this->error("WARNING: Exception caught during Admin bind - ".$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.
}
}
}
}