299 lines
7.9 KiB
PHP
299 lines
7.9 KiB
PHP
<?php
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/**
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*
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* @function zot_new_uid($channel_nick)
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* @channel_id = unique nickname of controlling entity
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* @returns string
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*
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*/
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function zot_new_uid($channel_nick) {
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$rawstr = z_root() . '/' . $channel_nick . '.' . mt_rand();
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return(base64url_encode(hash('whirlpool',$rawstr,true),true));
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}
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/**
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*
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* Given an array of zot_uid(s), return all distinct hubs
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* If primary is true, return only primary hubs
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* Result is ordered by url to assist in batching.
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* Return only the first primary hub as there should only be one.
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*
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*/
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function zot_get_hubloc($arr,$primary = false) {
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$tmp = '';
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if(is_array($arr)) {
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foreach($arr as $e) {
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if(strlen($tmp))
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$tmp .= ',';
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$tmp .= "'" . dbesc($e) . "'" ;
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}
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}
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if(! strlen($tmp))
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return array();
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$sql_extra = (($primary) ? " and hubloc_flags & " . intval(HUBLOC_FLAGS_PRIMARY) : "" );
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$limit = (($primary) ? " limit 1 " : "");
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return q("select * from hubloc where hubloc_hash in ( $tmp ) $sql_extra order by hubloc_url $limit");
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}
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// Given an item and an identity, sign the data.
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function zot_sign(&$item,$identity) {
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$item['signed'] = str_replace(array(" ","\t","\n","\r"),array('','','',''),base64url_encode($item['body'],true));
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$item['signature'] = base64url_encode(rsa_sign($item['signed'],$identity['prvkey']));
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}
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// Given an item and an identity, verify the signature.
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function zot_verify(&$item,$identity) {
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return rsa_verify($item['signed'],base64url_decode($item['signature']),$identity['pubkey']);
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}
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function zot_notify($channel,$url) {
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$x = z_post_url($url, array(
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'type' => 'notify',
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'guid' => $channel['channel_guid'],
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'guid_sig' => base64url_encode($guid,$channel['prvkey']),
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'hub' => z_root(),
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'hub_sig' => base64url_encode(z_root,$channel['prvkey']),
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'callback' => '/post',
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'spec' => ZOT_REVISION)
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);
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return($x);
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}
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function zot_finger($webbie,$channel) {
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if(strpos($webbie,'@') === false) {
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$address = $webbie;
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$host = get_app()->get_hostname();
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}
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else {
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$address = substr($webbie,0,strpos($webbie,'@'));
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$host = substr($webbie,strpos($webbie,'@')+1);
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}
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$xchan_addr = $address . '@' . $host;
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$r = q("select xchan.*, hubloc.* from xchan
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left join hubloc on xchan_hash = hubloc_hash
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where xchan_addr = '%s' and (hubloc_flags & %d) limit 1",
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dbesc($xchan_address),
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intval(HUBLOC_FLAGS_PRIMARY)
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);
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if($r) {
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$url = $r[0]['hubloc_url'];
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}
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else {
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$url = 'https://' . $host;
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}
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$rhs = '/.well-known/zot-guid';
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if($channel) {
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$postvars = array(
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'address' => $address,
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'target' => $channel['channel_guid'],
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'target_sig' => $channel['channel_guid_sig'],
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'key' => $channel['channel_pubkey']
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);
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$result = z_post_url($url . $rhs,$postvars);
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if(! $result['success'])
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$result = z_post_url('http://' . $host . $rhs,$postvars);
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}
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else {
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$rhs .= 'address=' . urlencode($address);
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$result = z_fetch_url($url . $rhs);
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if(! $result['success'])
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$result = z_fetch_url('http://' . $host . $rhs);
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}
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return $result;
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}
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function zot_gethub($arr) {
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if((x($arr,'guid')) && (x($arr,'guid_sig')) && (x($arr,'hub')) && (x($arr,'hub_sig'))) {
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$r = q("select * from hubloc
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where hubloc_guid = '%s' and hubloc_guid_sig = '%s'
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and hubloc_url = '%s' and hubloc_url_sig = '%s'
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limit 1",
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dbesc($arr['guid']),
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dbesc($arr['guid_sig']),
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dbesc($arr['hub']),
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dbesc($arr['hub_sig'])
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);
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if($r && count($r))
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return $r[0];
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}
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return null;
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}
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function zot_register_hub($arr) {
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$total = 0;
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if((x($arr,'hub')) && (x($arr,'guid'))) {
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$x = z_fetch_url($arr['hub'] . '/.well-known/zot-guid/' . $arr['guid']);
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if($x['success']) {
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$record = json_decode($x['body']);
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if($record->hub && count($record->hub)) {
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foreach($record->hub as $h) {
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// store any hubs we don't know about
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if( ! zot_gethub(
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array('guid' => $arr['guid'],
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'guid_sig' => $arr['guid_sig'],
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'hub' => $h->url,
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'hub_sig' => $h->url_sig))) {
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$r = q("insert into hubloc (hubloc_guid, hubloc_guid_sig, hubloc_flags, hubloc_url,
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hubloc_url_sig, hubloc_callback, hubloc_sitekey, hubloc_key)
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values ( '%s', '%s', %d, '%s', '%s', '%s', '%s', '%s' )",
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dbesc($arr['guid']),
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dbesc($arr['guid_sig']),
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intval((($h->primary) ? HUBLOC_FLAGS_PRIMARY : 0) | HUBLOC_FLAGS_UNVERIFIED ),
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dbesc($h->url),
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dbesc($h->url_sig),
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dbesc($h->callback),
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dbesc($h->sitekey),
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dbesc($record->key)
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);
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if($r)
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$total ++;
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}
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}
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}
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}
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}
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return $total;
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}
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// Takes a json array from zot_finger and imports the xchan and hublocs
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// If the xchan already exists, update the name and photo if these have changed.
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//
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function import_xchan_from_json($j) {
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$ret = array('success' => false);
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$xchan_hash = base64url_encode(hash('whirlpool',$j->guid . $j->guid_sig, true));
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$import_photos = false;
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if(! rsa_verify($j->guid,base64url_decode($j->guid_sig),$j->key)) {
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logger('import_xchan_from_json: Unable to verify channel signature for ' . $j->address);
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$ret['message'] = t('Unable to verify channel signature');
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return $ret;
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}
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$r = q("select * from xchan where xchan_hash = '%s' limit 1",
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dbesc($xchan_hash)
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);
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if($r) {
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if($r[0]['xchan_photo_date'] != $j->photo_updated)
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$update_photos = true;
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if($r[0]['xchan_name_date'] != $j->name_updated) {
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$r = q("update xchan set xchan_name = '%s', xchan_name_date = '%s' where xchan_hash = '%s' limit 1",
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dbesc($j->name),
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dbesc($j->name_updated),
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dbesc($xchan_hash)
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);
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}
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}
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else {
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$import_photos = true;
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$x = q("insert into xchan ( xchan_hash, xchan_guid, xchan_guid_sig, xchan_pubkey, xchan_photo_mimetype,
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xchan_photo_l, xchan_addr, xchan_url, xchan_name, xchan_network, xchan_photo_date, xchan_name_date)
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values ( '%s', '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s') ",
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dbesc($xchan_hash),
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dbesc($j->guid),
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dbesc($j->guid_sig),
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dbesc($j->key),
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dbesc($j->photo_mimetype),
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dbesc($j->photo),
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dbesc($j->address),
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dbesc($j->url),
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dbesc($j->name),
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dbesc('zot'),
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dbesc($j->photo_updated),
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dbesc($j->name_updated)
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);
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}
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if($import_photos) {
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require_once("Photo.php");
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$photos = import_profile_photo($j->photo,0,$xchan_hash);
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$r = q("update xchan set xchan_photo_date = '%s', xchan_photo_l = '%s', xchan_photo_m = '%s', xchan_photo_s = '%s', xchan_photo_mimetype = '%s'
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where xchan_hash = '%s' limit 1",
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dbesc($j->photo_updated),
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dbesc($photos[0]),
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dbesc($photos[1]),
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dbesc($photos[2]),
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dbesc($photos[3]),
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dbesc($xchan_hash)
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);
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}
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if($j->locations) {
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foreach($j->locations as $location) {
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if(! rsa_verify($location->url,base64url_decode($location->url_sig),$j->key)) {
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logger('import_xchan_from_json: Unable to verify site signature for ' . $location->url);
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$ret['message'] .= sprintf( t('Unable to verify site signature for %s'), $location->url) . EOL;
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continue;
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}
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$r = q("select * from hubloc where hubloc_hash = '%s' and hubloc_url = '%s' limit 1",
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dbesc($xchan_hash),
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dbesc($location->url)
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);
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if($r) {
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if(($r[0]['hubloc_flags'] & HUBLOC_FLAGS_PRIMARY) && (! $location->primary)) {
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$r = q("update hubloc set hubloc_flags = (hubloc_flags ^ %d) where hubloc_id = %d limit 1",
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intval(HUBLOC_FLAGS_PRIMARY),
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intval($r[0]['hubloc_id'])
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);
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}
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continue;
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}
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$r = q("insert into hubloc ( hubloc_guid, hubloc_guid_sig, hubloc_hash, hubloc_addr, hubloc_flags, hubloc_url, hubloc_url_sig, hubloc_host, hubloc_callback, hubloc_sitekey)
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values ( '%s','%s','%s','%s', %d ,'%s','%s','%s','%s','%s')",
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dbesc($j->guid),
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dbesc($j->guid_sig),
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dbesc($xchan_hash),
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dbesc($location->address),
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intval((intval($location->primary)) ? HUBLOC_FLAGS_PRIMARY : 0),
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dbesc($location->url),
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dbesc($location->url_sig),
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dbesc($location->host),
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dbesc($location->callback),
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dbesc($location->sitekey)
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);
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}
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}
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if(! x($ret,'message')) {
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$ret['success'] = true;
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}
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return $ret;
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} |