399 lines
11 KiB
PHP
399 lines
11 KiB
PHP
<?php
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namespace App\Classes\LDAP;
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use Carbon\Carbon;
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use Exception;
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use Illuminate\Support\Arr;
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use Illuminate\Support\Collection as ArrayCollection;
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use Illuminate\Support\Facades\Cache;
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use Illuminate\Support\Facades\Config;
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use Illuminate\Support\Facades\Log;
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use LdapRecord\Query\Collection;
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use App\Classes\LDAP\Schema\{AttributeType,Base,LDAPSyntax,MatchingRule,MatchingRuleUse,ObjectClass};
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use App\Exceptions\InvalidUsage;
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use App\Ldap\Entry;
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class Server
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{
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// This servers schema objectclasses
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private ArrayCollection $attributetypes;
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private ArrayCollection $ldapsyntaxes;
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private ArrayCollection $matchingrules;
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private ArrayCollection $matchingruleuse;
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private ArrayCollection $objectclasses;
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// Valid items that can be fetched
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public const schema_types = [
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'objectclasses',
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'attributetypes',
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'ldapsyntaxes',
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'matchingrules',
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];
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public function __get(string $key): mixed
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{
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switch ($key) {
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case 'attributetypes': return $this->attributetypes;
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case 'ldapsyntaxes': return $this->ldapsyntaxes;
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case 'matchingrules': return $this->matchingrules;
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case 'objectclasses': return $this->objectclasses;
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default:
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throw new Exception('Unknown key:'.$key);
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}
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}
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/**
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* Query the server for a DN and return its children and if those children have children.
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*
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* @param string $dn
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* @return Collection|null
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*/
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public function children(string $dn): ?Collection
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{
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return ($x=(new Entry)
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->query()
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->cache(Carbon::now()->addSeconds(Config::get('ldap.cache.time')))
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->select(['*','hassubordinates'])
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->setDn($dn)
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->listing()
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->get()) ? $x : NULL;
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}
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/**
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* Fetch a DN from the server
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*
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* @param string $dn
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* @param array $attrs
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* @return Entry|null
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*/
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public function fetch(string $dn,array $attrs=['*','+']): ?Entry
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{
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return ($x=(new Entry)
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->query()
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->cache(Carbon::now()->addSeconds(Config::get('ldap.cache.time')))
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->select($attrs)
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->find($dn)) ? $x : NULL;
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}
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/**
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* Given an LDAP OID number, returns a verbose description of the OID.
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* This function parses ldap_supported_oids.txt and looks up the specified
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* OID, and returns the verbose message defined in that file.
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*
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* <code>
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* Array (
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* [title] => All Operational Attribute
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* [ref] => RFC 3673
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* [desc] => An LDAP extension which clients may use to request the return of all operational attributes.
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* )
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* </code>
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*
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* @param string $oid The OID number (ie, "1.3.6.1.4.1.4203.1.5.1") of the OID of interest.
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* @param string $key The title|ref|desc to return
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* @return string|null
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* @testedby TranslateOidTest::testRootDSE()
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*/
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public static function getOID(string $oid,string $key): ?string
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{
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$oids = Cache::remember('oids',86400,function() {
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try {
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$f = fopen(config_path('ldap_supported_oids.txt'),'r');
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} catch (Exception $e) {
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return NULL;
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}
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$result = collect();
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while (! feof($f)) {
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$line = trim(fgets($f));
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if (! $line OR preg_match('/^#/',$line))
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continue;
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$fields = explode(':',$line);
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$result->put(Arr::get($fields,0),[
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'title'=>Arr::get($fields,1),
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'ref'=>Arr::get($fields,2),
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'desc'=>Arr::get($fields,3),
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]);
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}
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fclose($f);
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return $result;
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});
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return Arr::get(
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($oids ? $oids->get($oid) : []),
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$key,
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($key == 'desc' ? 'No description available, can you help with one?' : ($key == 'title' ? $oid : NULL))
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);
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}
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/**
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* This function determines if the specified attribute is contained in the force_may list
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* as configured in config.php.
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*
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* @return boolean True if the specified attribute is configured to be force as a may attribute
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*/
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public function isForceMay($attr_name): bool
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{
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return in_array($attr_name,config('pla.force_may',[]));
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}
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/**
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* Return the server's schema
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*
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* @param string $item Schema Item to Fetch
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* @param string|null $key
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* @return ArrayCollection|Base
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* @throws InvalidUsage
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*/
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public function schema(string $item,string $key=NULL): ArrayCollection|Base|NULL
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{
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// Ensure our item to fetch is lower case
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$item = strtolower($item);
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if ($key)
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$key = strtolower($key);
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// This error message is not localized as only developers should ever see it
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if (! in_array($item,self::schema_types))
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throw new InvalidUsage('Invalid request to fetch schema: '.$item);
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$result = Cache::remember('schema'.$item,config('ldap.cache.time'),function() use ($item) {
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// First pass if we have already retrieved the schema item
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switch ($item) {
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case 'attributetypes':
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if (isset($this->attributetypes))
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return $this->attributetypes;
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else
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$this->attributetypes = collect();
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break;
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case 'ldapsyntaxes':
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if (isset($this->ldapsyntaxes))
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return $this->ldapsyntaxes;
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else
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$this->ldapsyntaxes = collect();
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break;
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case 'matchingrules':
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if (isset($this->matchingrules))
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return $this->matchingrules;
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else
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$this->matchingrules = collect();
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break;
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/*
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case 'matchingruleuse':
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if (isset($this->matchingruleuse))
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return is_null($key) ? $this->matchingruleuse : $this->matchingruleuse->get($key);
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else
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$this->matchingruleuse = collect();
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break;
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*/
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case 'objectclasses':
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if (isset($this->objectclasses))
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return $this->objectclasses;
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else
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$this->objectclasses = collect();
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break;
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// Shouldnt get here
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default:
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throw new InvalidUsage('Invalid request to fetch schema: '.$item);
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}
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// Try to get the schema DN from the specified entry.
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$schema_dn = Entry::schemaDN();
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$schema = (new Server)->fetch($schema_dn);
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switch ($item) {
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case 'attributetypes':
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Log::debug('Attribute Types');
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// build the array of attribueTypes
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//$syntaxes = $this->SchemaSyntaxes($dn);
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foreach ($schema->{$item} as $line) {
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if (is_null($line) || ! strlen($line))
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continue;
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$o = new AttributeType($line);
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$this->attributetypes->put($o->name_lc,$o);
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/*
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if (isset($syntaxes[$attr->getSyntaxOID()])) {
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$syntax = $syntaxes[$attr->getSyntaxOID()];
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$attr->setType($syntax->getDescription());
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}
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$this->attributetypes[$attr->getName()] = $attr;
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*/
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/**
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* bug 856832: create an entry in the $attrs_oid array too. This
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* will be a ref to the $attrs entry for maintenance and performance
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* reasons
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*/
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//$attrs_oid[$attr->getOID()] = &$attrs[$attr->getName()];
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}
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// go back and add data from aliased attributeTypes
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foreach ($this->attributetypes as $o) {
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/* foreach of the attribute's aliases, create a new entry in the attrs array
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* with its name set to the alias name, and all other data copied.*/
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if ($o->aliases->count()) {
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Log::debug(sprintf('\ Attribute [%s] has the following aliases [%s]',$o->name,$o->aliases->join(',')));
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foreach ($o->aliases as $alias) {
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$new_attr = clone $o;
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$new_attr->setName($alias);
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$new_attr->addAlias($o->name);
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$new_attr->removeAlias($alias);
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$this->attributetypes->put(strtolower($alias),$new_attr);
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}
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}
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}
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// Now go through and reference the parent/child relationships
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foreach ($this->attributetypes as $o)
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if ($o->sup_attribute) {
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$parent = strtolower($o->sup_attribute);
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if ($this->attributetypes->has($parent) !== FALSE)
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$this->attributetypes[$parent]->addChild($o->name);
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}
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// go through any children and add details if the child doesnt have them (ie, cn inherits name)
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// @todo This doesnt traverse children properly, so children of children may not get the settings they should
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foreach ($this->attributetypes as $parent) {
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foreach ($parent->children as $child) {
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$child = strtolower($child);
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/* only overwrite the child's SINGLE-VALUE property if the parent has it set, and the child doesnt
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* (note: All LDAP attributes default to multi-value if not explicitly set SINGLE-VALUE) */
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if (! is_null($parent->is_single_value) && is_null($this->attributetypes[$child]->is_single_value))
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$this->attributetypes[$child]->setIsSingleValue($parent->is_single_value);
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}
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}
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// Add the used in and required_by values.
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foreach ($this->schema('objectclasses') as $object_class) {
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$must_attrs = $object_class->getMustAttrNames();
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$may_attrs = $object_class->getMayAttrNames();
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$oclass_attrs = $must_attrs->merge($may_attrs)->unique();
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// Add Used In.
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foreach ($oclass_attrs as $attr_name)
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if ($this->attributetypes->has(strtolower($attr_name)))
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$this->attributetypes[strtolower($attr_name)]->addUsedInObjectClass($object_class->name);
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// Add Required By.
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foreach ($must_attrs as $attr_name)
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if ($this->attributetypes->has(strtolower($attr_name)))
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$this->attributetypes[strtolower($attr_name)]->addRequiredByObjectClass($object_class->name);
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// Force May
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foreach ($object_class->getForceMayAttrs() as $attr_name)
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if ($this->attributetypes->has(strtolower($attr_name->name)))
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$this->attributetypes[strtolower($attr_name->name)]->setForceMay();
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}
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return $this->attributetypes;
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case 'ldapsyntaxes':
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Log::debug('LDAP Syntaxes');
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foreach ($schema->{$item} as $line) {
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if (is_null($line) || ! strlen($line))
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continue;
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$o = new LDAPSyntax($line);
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$this->ldapsyntaxes->put(strtolower($o->oid),$o);
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}
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return $this->ldapsyntaxes;
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case 'matchingrules':
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Log::debug('Matching Rules');
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$this->matchingruleuse = collect();
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foreach ($schema->{$item} as $line) {
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if (is_null($line) || ! strlen($line))
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continue;
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$o = new MatchingRule($line);
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$this->matchingrules->put($o->name_lc,$o);
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}
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/*
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* For each MatchingRuleUse entry, add the attributes who use it to the
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* MatchingRule in the $rules array.
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*/
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if ($schema->matchingruleuse) {
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foreach ($schema->matchingruleuse as $line) {
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if (is_null($line) || ! strlen($line))
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continue;
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$o = new MatchingRuleUse($line);
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$this->matchingruleuse->put($o->name_lc,$o);
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if ($this->matchingrules->has($o->name_lc) !== FALSE)
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$this->matchingrules[$o->name_lc]->setUsedByAttrs($o->getUsedByAttrs());
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}
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} else {
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/* No MatchingRuleUse entry in the subschema, so brute-forcing
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* the reverse-map for the "$rule->getUsedByAttrs()" data.*/
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foreach ($this->schema('attributetypes') as $attr) {
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$rule_key = strtolower($attr->getEquality());
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if ($this->matchingrules->has($rule_key) !== FALSE)
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$this->matchingrules[$rule_key]->addUsedByAttr($attr->name);
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}
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}
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return $this->matchingrules;
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case 'objectclasses':
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Log::debug('Object Classes');
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foreach ($schema->{$item} as $line) {
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if (is_null($line) || ! strlen($line))
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continue;
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$o = new ObjectClass($line,$this);
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$this->objectclasses->put($o->name_lc,$o);
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}
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// Now go through and reference the parent/child relationships
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foreach ($this->objectclasses as $o)
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foreach ($o->getSupClasses() as $parent) {
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$parent = strtolower($parent);
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if ($this->objectclasses->has($parent) !== FALSE)
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$this->objectclasses[$parent]->addChildObjectClass($o->name);
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}
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return $this->objectclasses;
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}
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});
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return is_null($key) ? $result : $result->get($key);
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}
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public function schemaSyntaxName(string $oid): ?LDAPSyntax
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{
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return $this->schema('ldapsyntaxes',$oid);
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}
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} |