<?php /** * * @function zot_new_uid($entity_id) * @entity_id = integer id of controlling entity * @returns string * */ function zot_new_uid($entity_id) { $rawstr = z_root() . '/' . $entity_id . '.' . mt_rand(); return(base64url_encode(hash('whirlpool',$rawstr,true),true) . '.' . mt_rand()); } /** * * Given an array of zot_uid(s), return all distinct hubs * If primary is true, return only primary hubs * Result is ordered by url to assist in batching. * */ function zot_get_hubloc($arr,$primary = false) { $tmp = ''; if(is_array($arr)) { foreach($arr as $e) { if(strlen($tmp)) $tmp .= ','; $tmp .= "'" . dbesc($e) . "'" ; } } if(! strlen($tmp)) return array(); $sql_extra = (($primary) ? " and hubloc_primary = 1 " : "" ); return q("select * from hubloc where hubloc_guid in ( $tmp ) $sql_extra order by hubloc_url"); } // Given an item and an identity, sign the data. function zot_sign(&$item,$identity) { $item['signed'] = str_replace(array(" ","\t","\n","\r"),array('','','',''),base64url_encode($item['body'],true)); $item['signature'] = base64url_encode(rsa_sign($item['signed'],$identity['prvkey'])); } // Given an item and an identity, verify the signature. function zot_verify(&$item,$identity) { return rsa_verify($item['signed'],base64url_decode($item['signature']),$identity['pubkey']); } function zot_notify($entity,$url) { $x = z_post_url($url, array( 'type' => 'notify', 'guid' => $entity['entity_global_id'], 'hub' => z_root(), 'callback' => '/post', 'spec' => ZOT_REVISION) ); return($x); } function zot_gethub($arr) { if((x($arr,'hub')) && (x($arr,'guid'))) { $r = q("select * from hubloc where hubloc_guid = '%s' and hubloc_url = '%s' limit 1", dbesc($arr['guid']), dbesc($arr['hub']) ); if($r && count($r)) return $r[0]; } return null; } function zot_register_hub($arr) { if((x($arr,'hub')) && (x($arr,'guid'))) { $x = z_fetch_url($arr['hub'] . '/.well-known/zot-guid/' . $arr['guid']); if($x['success']) { $record = json_decode($x['body']); if($record->guid === $arr['guid'] && $record->url === $arr['hub']) { $r = q("insert into hubloc (hubloc_guid, hubloc_primary, hubloc_url, hubloc_callback, hubloc_sitekey, hubloc_key) values ( '%s', %d, '%s', '%s', '%s', '%s' )", dbesc($arr['guid']), intval($record->primary), dbesc($record->url), dbesc($record->callback), dbesc($record->sitekey), dbesc($record->key) ); // return the discovery record so we can further process if($r) return $record; } } } return false; }