<?php /** * * Module: dfrn_request * * Purpose: Handles communication associated with the issuance of * friend requests. * */ if(! function_exists('dfrn_request_init')) { function dfrn_request_init(&$a) { if((get_config('system','block_public')) && (! local_user()) && (! remote_user())) { return; } if($a->argc > 1) $which = $a->argv[1]; profile_load($a,$which); return; }} /** * Function: dfrn_request_post * * Purpose: * Handles multiple scenarios. * * Scenario 1: * Clicking 'submit' on a friend request page. * * Scenario 2: * Following Scenario 1, we are brought back to our home site * in order to link our friend request with our own server cell. * After logging in, we click 'submit' to approve the linkage. * */ if(! function_exists('dfrn_request_post')) { function dfrn_request_post(&$a) { if(($a->argc != 2) || (! count($a->profile))) return; if($_POST['cancel']) { goaway(z_root()); } /** * * Scenario 2: We've introduced ourself to another cell, then have been returned to our own cell * to confirm the request, and then we've clicked submit (perhaps after logging in). * That brings us here: * */ if((x($_POST,'localconfirm')) && ($_POST['localconfirm'] == 1)) { /** * Ensure this is a valid request */ if(local_user() && ($a->user['nickname'] == $a->argv[1]) && (x($_POST,'dfrn_url'))) { $dfrn_url = notags(trim($_POST['dfrn_url'])); $aes_allow = (((x($_POST,'aes_allow')) && ($_POST['aes_allow'] == 1)) ? 1 : 0); $confirm_key = ((x($_POST,'confirm_key')) ? $_POST['confirm_key'] : ""); $contact_record = null; if(x($dfrn_url)) { /** * Lookup the contact based on their URL (which is the only unique thing we have at the moment) */ $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1", intval(local_user()), dbesc($dfrn_url) ); if(count($r)) { if(strlen($r[0]['dfrn-id'])) { /** * We don't need to be here. It has already happened. */ notice( t("This introduction has already been accepted.") . EOL ); return; } else $contact_record = $r[0]; } if(is_array($contact_record)) { $r = q("UPDATE `contact` SET `ret-aes` = %d WHERE `id` = %d LIMIT 1", intval($aes_allow), intval($contact_record['id']) ); } else { /** * Scrape the other site's profile page to pick up the dfrn links, key, fn, and photo */ require_once('Scrape.php'); $parms = scrape_dfrn($dfrn_url); if(! count($parms)) { notice( t('Profile location is not valid or does not contain profile information.') . EOL ); return; } else { if(! x($parms,'fn')) notice( t('Warning: profile location has no identifiable owner name.') . EOL ); if(! x($parms,'photo')) notice( t('Warning: profile location has no profile photo.') . EOL ); $invalid = validate_dfrn($parms); if($invalid) { notice( sprintf( tt("%d required parameter was not found at the given location", "%d required parameters were not found at the given location", $invalid), $invalid) . EOL ); return; } } $dfrn_request = $parms['dfrn-request']; /********* Escape the entire array ********/ dbesc_array($parms); /******************************************/ /** * Create a contact record on our site for the other person */ $r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `name`, `nick`, `photo`, `site-pubkey`, `request`, `confirm`, `notify`, `poll`, `aes_allow`) VALUES ( %d, '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d)", intval(local_user()), datetime_convert(), dbesc($dfrn_url), $parms['fn'], $parms['nick'], $parms['photo'], $parms['key'], $parms['dfrn-request'], $parms['dfrn-confirm'], $parms['dfrn-notify'], $parms['dfrn-poll'], intval($aes_allow) ); } if($r) { info( t("Introduction complete.") . EOL); } /** * Allow the blocked remote notification to complete */ if(is_array($contact_record)) $dfrn_request = $contact_record['request']; if(strlen($dfrn_request) && strlen($confirm_key)) $s = fetch_url($dfrn_request . '?confirm_key=' . $confirm_key); // (ignore reply, nothing we can do it failed) goaway($dfrn_url); return; // NOTREACHED } } // invalid/bogus request notice( t('Unrecoverable protocol error.') . EOL ); goaway(z_root()); return; // NOTREACHED } /** * Otherwise: * * Scenario 1: * We are the requestee. A person from a remote cell has made an introduction * on our profile web page and clicked submit. We will use their DFRN-URL to * figure out how to contact their cell. * * Scrape the originating DFRN-URL for everything we need. Create a contact record * and an introduction to show our user next time he/she logs in. * Finally redirect back to the requestor so that their site can record the request. * If our user (the requestee) later confirms this request, a record of it will need * to exist on the requestor's cell in order for the confirmation process to complete.. * * It's possible that neither the requestor or the requestee are logged in at the moment, * and the requestor does not yet have any credentials to the requestee profile. * * Who is the requestee? We've already loaded their profile which means their nickname should be * in $a->argv[1] and we should have their complete info in $a->profile. * */ if(! (is_array($a->profile) && count($a->profile))) { notice( t('Profile unavailable.') . EOL); return; } $nickname = $a->profile['nickname']; $notify_flags = $a->profile['notify-flags']; $uid = $a->profile['uid']; $maxreq = intval($a->profile['maxreq']); $contact_record = null; $failed = false; $parms = null; if( x($_POST,'dfrn_url')) { /** * Block friend request spam */ if($maxreq) { $r = q("SELECT * FROM `intro` WHERE `datetime` > '%s' AND `uid` = %d", dbesc(datetime_convert('UTC','UTC','now - 24 hours')), intval($uid) ); if(count($r) > $maxreq) { notice( sprintf( t('%s has received too many connection requests today.'), $a->profile['name']) . EOL); notice( t('Spam protection measures have been invoked.') . EOL); notice( t('Friends are advised to please try again in 24 hours.') . EOL); return; } } /** * * Cleanup old introductions that remain blocked. * Also remove the contact record, but only if there is no existing relationship * */ $r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel` FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id` WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0 AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 30 MINUTE "); if(count($r)) { foreach($r as $rr) { if(! $rr['rel']) { q("DELETE FROM `contact` WHERE `id` = %d LIMIT 1", intval($rr['cid']) ); } q("DELETE FROM `intro` WHERE `id` = %d LIMIT 1", intval($rr['iid']) ); } } $url = trim($_POST['dfrn_url']); if(! strlen($url)) { notice( t("Invalid locator") . EOL ); return; } // Canonicalise email-style profile locator $url = webfinger_dfrn($url); if(substr($url,0,5) === 'stat:') { $network = 'stat'; $url = substr($url,5); } else { $network = 'dfrn'; } logger('dfrn_request: url: ' . $url); if(! strlen($url)) { notice( t("Unable to resolve your name at the provided location.") . EOL); return; } if($network === 'dfrn') { $ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1", intval($uid), dbesc($url) ); if(count($ret)) { if(strlen($ret[0]['issued-id'])) { notice( t('You have already introduced yourself here.') . EOL ); return; } elseif($ret[0]['rel'] == CONTACT_IS_FRIEND) { notice( sprintf( t('Apparently you are already friends with %s.'), $a->profile['name']) . EOL); return; } else { $contact_record = $ret[0]; $parms = array('dfrn-request' => $ret[0]['request']); } } $issued_id = random_string(); if(is_array($contact_record)) { // There is a contact record but no issued-id, so this // is a reciprocal introduction from a known contact $r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d LIMIT 1", dbesc($issued_id), intval($contact_record['id']) ); } else { if(! validate_url($url)) { notice( t('Invalid profile URL.') . EOL); goaway($a->get_baseurl() . '/' . $a->cmd); return; // NOTREACHED } if(! allowed_url($url)) { notice( t('Disallowed profile URL.') . EOL); goaway($a->get_baseurl() . '/' . $a->cmd); return; // NOTREACHED } require_once('Scrape.php'); $parms = scrape_dfrn($url); if(! count($parms)) { notice( t('Profile location is not valid or does not contain profile information.') . EOL ); goaway($a->get_baseurl() . '/' . $a->cmd); } else { if(! x($parms,'fn')) notice( t('Warning: profile location has no identifiable owner name.') . EOL ); if(! x($parms,'photo')) notice( t('Warning: profile location has no profile photo.') . EOL ); $invalid = validate_dfrn($parms); if($invalid) { notice( sprintf( tt("%d required parameter was not found at the given location", "%d required parameters were not found at the given location", $invalid), $invalid) . EOL ); return; } } $parms['url'] = $url; $parms['issued-id'] = $issued_id; dbesc_array($parms); $r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `name`, `nick`, `issued-id`, `photo`, `site-pubkey`, `request`, `confirm`, `notify`, `poll` ) VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s' )", intval($uid), datetime_convert(), $parms['url'], $parms['fn'], $parms['nick'], $parms['issued-id'], $parms['photo'], $parms['key'], $parms['dfrn-request'], $parms['dfrn-confirm'], $parms['dfrn-notify'], $parms['dfrn-poll'] ); // find the contact record we just created if($r) { $r = q("SELECT `id` FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `issued-id` = '%s' LIMIT 1", intval($uid), $parms['url'], $parms['issued-id'] ); if(count($r)) $contact_record = $r[0]; } } if($r === false) { notice( t('Failed to update contact record.') . EOL ); return; } $hash = random_string() . (string) time(); // Generate a confirm_key if(is_array($contact_record)) { $ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`) VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )", intval($uid), intval($contact_record['id']), ((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0), dbesc(notags(trim($_POST['dfrn-request-message']))), dbesc($hash), dbesc(datetime_convert()) ); } // This notice will only be seen by the requestor if the requestor and requestee are on the same server. if(! $failed) info( t('Your introduction has been sent.') . EOL ); // "Homecoming" - send the requestor back to their site to record the introduction. $dfrn_url = bin2hex($a->get_baseurl() . '/profile/' . $nickname); $aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0); goaway($parms['dfrn-request'] . "?dfrn_url=$dfrn_url" . '&dfrn_version=' . DFRN_PROTOCOL_VERSION . '&confirm_key=' . $hash . (($aes_allow) ? "&aes_allow=1" : "") ); // NOTREACHED // END $network === 'dfrn' } elseif($network === 'stat') { /** * * OStatus network * Check contact existence * Try and scrape together enough information to create a contact record, with us as CONTACT_IS_FOLLOWER * Substitute our user's feed URL into $url template * Send the subscriber home to subscribe * */ $url = str_replace('{uri}', $a->get_baseurl() . '/dfrn_poll/' . $nickname, $url); goaway($url); // NOTREACHED // END $network === 'stat' } } return; }} if(! function_exists('dfrn_request_content')) { function dfrn_request_content(&$a) { if(($a->argc != 2) || (! count($a->profile))) return ""; // "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button // to send us to the post section to record the introduction. if(x($_GET,'dfrn_url')) { if(! local_user()) { info( t("Please login to confirm introduction.") . EOL ); /* setup the return URL to come back to this page if they use openid */ $stripped = str_replace('q=','',$a->query_string); $_SESSION['return_url'] = trim($stripped,'/'); return login(); } // Edge case, but can easily happen in the wild. This person is authenticated, // but not as the person who needs to deal with this request. if ($a->user['nickname'] != $a->argv[1]) { notice( t("Incorrect identity currently logged in. Please login to <strong>this</strong> profile.") . EOL); return login(); } $dfrn_url = notags(trim(hex2bin($_GET['dfrn_url']))); $aes_allow = (((x($_GET,'aes_allow')) && ($_GET['aes_allow'] == 1)) ? 1 : 0); $confirm_key = (x($_GET,'confirm_key') ? $_GET['confirm_key'] : ""); $tpl = get_markup_template("dfrn_req_confirm.tpl"); $o = replace_macros($tpl,array( '$dfrn_url' => $dfrn_url, '$aes_allow' => (($aes_allow) ? '<input type="hidden" name="aes_allow" value="1" />' : "" ), '$confirm_key' => $confirm_key, '$welcome' => sprintf( t('Welcome home %s.'), $a->user['username']), '$please' => sprintf( t('Please confirm your introduction/connection request to %s.'), $dfrn_url), '$submit' => t('Confirm'), '$uid' => $_SESSION['uid'], '$nickname' => $a->user['nickname'], 'dfrn_rawurl' => $_GET['dfrn_url'] )); return $o; } elseif((x($_GET,'confirm_key')) && strlen($_GET['confirm_key'])) { // we are the requestee and it is now safe to send our user their introduction, // We could just unblock it, but first we have to jump through a few hoops to // send an email, or even to find out if we need to send an email. $intro = q("SELECT * FROM `intro` WHERE `hash` = '%s' LIMIT 1", dbesc($_GET['confirm_key']) ); if(count($intro)) { $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid` WHERE `contact`.`id` = %d LIMIT 1", intval($intro[0]['contact-id']) ); $auto_confirm = false; if(count($r)) { if($r[0]['page-flags'] != PAGE_NORMAL) $auto_confirm = true; if(($r[0]['notify-flags'] & NOTIFY_INTRO) && (! $auto_confirm)) { $email_tpl = get_intltext_template('request_notify_eml.tpl'); $email = replace_macros($email_tpl, array( '$requestor' => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : t('[Name Withheld]')), '$url' => stripslashes($r[0]['url']), '$myname' => $r[0]['username'], '$siteurl' => $a->get_baseurl(), '$sitename' => $a->config['sitename'] )); $res = mail($r[0]['email'], t("Introduction received at ") . $a->config['sitename'], $email, 'From: ' . t('Administrator') . '@' . $_SERVER['SERVER_NAME'] . "\n" . 'Content-type: text/plain; charset=UTF-8' . "\n" . 'Content-transfer-encoding: 8bit' ); // This is a redundant notification - no point throwing errors if it fails. } if($auto_confirm) { require_once('mod/dfrn_confirm.php'); $handsfree = array( 'uid' => $r[0]['uid'], 'node' => $r[0]['nickname'], 'dfrn_id' => $r[0]['issued-id'], 'intro_id' => $intro[0]['id'], 'duplex' => (($r[0]['page-flags'] == PAGE_FREELOVE) ? 1 : 0) ); dfrn_confirm_post($a,$handsfree); } } if(! $auto_confirm) { // If we are auto_confirming, this record will have already been nuked // in dfrn_confirm_post() $r = q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s' LIMIT 1", dbesc($_GET['confirm_key']) ); } } killme(); return; // NOTREACHED } else { /** * Normal web request. Display our user's introduction form. */ if((get_config('system','block_public')) && (! local_user()) && (! remote_user())) { notice( t('Public access denied.') . EOL); return; } /** * Try to auto-fill the profile address */ if(local_user()) { if(strlen($a->path)) { $myaddr = $a->get_baseurl() . '/profile/' . $a->user['nickname']; } else { $myaddr = $a->user['nickname'] . '@' . substr(z_root(), strpos(z_root(),'://') + 3 ); } } elseif(x($_GET,'addr')) { $myaddr = hex2bin($_GET['addr']); } else { /* $_GET variables are already urldecoded */ $myaddr = ((x($_GET,'address')) ? $_GET['address'] : ''); } /** * * The auto_request form only has the profile address * because nobody is going to read the comments and * it doesn't matter if they know you or not. * */ if($a->profile['page-flags'] == PAGE_NORMAL) $tpl = get_markup_template('dfrn_request.tpl'); else $tpl = get_markup_template('auto_request.tpl'); $o .= replace_macros($tpl,array( '$header' => t('Friend/Connection Request'), '$desc' => t('Examples: jojo@demo.friendika.com, http://demo.friendika.com/profile/jojo, testuser@identi.ca'), '$pls_answer' => t('Please answer the following:'), '$does_know' => sprintf( t('Does %s know you?'),$a->profile['name']), '$yes' => t('Yes'), '$no' => t('No'), '$add_note' => t('Add a personal note:'), '$page_desc' => t("Please enter your 'Identity Address' from one of the following supported social networks:"), '$friendika' => t('Friendika'), '$statusnet' => t('StatusNet/Federated Social Web'), '$private_net' => t("Private \x28secure\x29 network"), '$public_net' => t("Public \x28insecure\x29 network"), '$your_address' => t('Your Identity Address:'), '$submit' => t('Submit Request'), '$cancel' => t('Cancel'), '$nickname' => $a->argv[1], '$name' => $a->profile['name'], '$myaddr' => $myaddr )); return $o; } return; // Somebody is fishing. }}