<?php // curl wrapper. If binary flag is true, return binary // results. if(! function_exists('fetch_url')) { function fetch_url($url,$binary = false, &$redirects = 0, $timeout = 0) { $a = get_app(); $ch = curl_init($url); if(($redirects > 8) || (! $ch)) return false; curl_setopt($ch, CURLOPT_HEADER, true); curl_setopt($ch, CURLOPT_RETURNTRANSFER,true); curl_setopt($ch, CURLOPT_USERAGENT, "Friendika"); if(intval($timeout)) { curl_setopt($ch, CURLOPT_TIMEOUT, $timeout); } else { $curl_time = intval(get_config('system','curl_timeout')); curl_setopt($ch, CURLOPT_TIMEOUT, (($curl_time !== false) ? $curl_time : 60)); } // by default we will allow self-signed certs // but you can override this $check_cert = get_config('system','verifyssl'); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false)); $prx = get_config('system','proxy'); if(strlen($prx)) { curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1); curl_setopt($ch, CURLOPT_PROXY, $prx); $prxusr = get_config('system','proxyuser'); if(strlen($prxusr)) curl_setopt($ch, CURLOPT_PROXYUSERPWD, $prxusr); } if($binary) curl_setopt($ch, CURLOPT_BINARYTRANSFER,1); $a->set_curl_code(0); // don't let curl abort the entire application // if it throws any errors. $s = @curl_exec($ch); $base = $s; $curl_info = curl_getinfo($ch); $http_code = $curl_info['http_code']; $header = ''; // Pull out multiple headers, e.g. proxy and continuation headers // allow for HTTP/2.x without fixing code while(preg_match('/^HTTP\/[1-2].+? [1-5][0-9][0-9]/',$base)) { $chunk = substr($base,0,strpos($base,"\r\n\r\n")+4); $header .= $chunk; $base = substr($base,strlen($chunk)); } if($http_code == 301 || $http_code == 302 || $http_code == 303 || $http_code == 307) { $matches = array(); preg_match('/(Location:|URI:)(.*?)\n/', $header, $matches); $url = trim(array_pop($matches)); $url_parsed = @parse_url($url); if (isset($url_parsed)) { $redirects++; return fetch_url($url,$binary,$redirects,$timeout); } } $a->set_curl_code($http_code); $body = substr($s,strlen($header)); $a->set_curl_headers($header); curl_close($ch); return($body); }} // post request to $url. $params is an array of post variables. if(! function_exists('post_url')) { function post_url($url,$params, $headers = null, &$redirects = 0, $timeout = 0) { $a = get_app(); $ch = curl_init($url); if(($redirects > 8) || (! $ch)) return false; curl_setopt($ch, CURLOPT_HEADER, true); curl_setopt($ch, CURLOPT_RETURNTRANSFER,true); curl_setopt($ch, CURLOPT_POST,1); curl_setopt($ch, CURLOPT_POSTFIELDS,$params); curl_setopt($ch, CURLOPT_USERAGENT, "Friendika"); if(intval($timeout)) { curl_setopt($ch, CURLOPT_TIMEOUT, $timeout); } else { $curl_time = intval(get_config('system','curl_timeout')); curl_setopt($ch, CURLOPT_TIMEOUT, (($curl_time !== false) ? $curl_time : 60)); } if(defined('LIGHTTPD')) { if(!is_array($headers)) { $headers = array('Expect:'); } else { if(!in_array('Expect:', $headers)) { array_push($headers, 'Expect:'); } } } if($headers) curl_setopt($ch, CURLOPT_HTTPHEADER, $headers); $check_cert = get_config('system','verifyssl'); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false)); $prx = get_config('system','proxy'); if(strlen($prx)) { curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1); curl_setopt($ch, CURLOPT_PROXY, $prx); $prxusr = get_config('system','proxyuser'); if(strlen($prxusr)) curl_setopt($ch, CURLOPT_PROXYUSERPWD, $prxusr); } $a->set_curl_code(0); // don't let curl abort the entire application // if it throws any errors. $s = @curl_exec($ch); $base = $s; $curl_info = curl_getinfo($ch); $http_code = $curl_info['http_code']; $header = ''; // Pull out multiple headers, e.g. proxy and continuation headers // allow for HTTP/2.x without fixing code while(preg_match('/^HTTP\/[1-2].+? [1-5][0-9][0-9]/',$base)) { $chunk = substr($base,0,strpos($base,"\r\n\r\n")+4); $header .= $chunk; $base = substr($base,strlen($chunk)); } if($http_code == 301 || $http_code == 302 || $http_code == 303) { $matches = array(); preg_match('/(Location:|URI:)(.*?)\n/', $header, $matches); $url = trim(array_pop($matches)); $url_parsed = @parse_url($url); if (isset($url_parsed)) { $redirects++; return post_url($url,$params,$headers,$redirects,$timeout); } } $a->set_curl_code($http_code); $body = substr($s,strlen($header)); $a->set_curl_headers($header); curl_close($ch); return($body); }} // Generic XML return // Outputs a basic dfrn XML status structure to STDOUT, with a <status> variable // of $st and an optional text <message> of $message and terminates the current process. if(! function_exists('xml_status')) { function xml_status($st, $message = '') { $xml_message = ((strlen($message)) ? "\t<message>" . xmlify($message) . "</message>\r\n" : ''); if($st) logger('xml_status returning non_zero: ' . $st . " message=" . $message); header( "Content-type: text/xml" ); echo '<?xml version="1.0" encoding="UTF-8"?>'."\r\n"; echo "<result>\r\n\t<status>$st</status>\r\n$xml_message</result>\r\n"; killme(); }} if(! function_exists('http_status_exit')) { function http_status_exit($val) { if($val >= 400) $err = 'Error'; if($val >= 200 && $val < 300) $err = 'OK'; logger('http_status_exit ' . $val); header($_SERVER["SERVER_PROTOCOL"] . ' ' . $val . ' ' . $err); killme(); }} // convert an XML document to a normalised, case-corrected array // used by webfinger if(! function_exists('convert_xml_element_to_array')) { function convert_xml_element_to_array($xml_element, &$recursion_depth=0) { // If we're getting too deep, bail out if ($recursion_depth > 512) { return(null); } if (!is_string($xml_element) && !is_array($xml_element) && (get_class($xml_element) == 'SimpleXMLElement')) { $xml_element_copy = $xml_element; $xml_element = get_object_vars($xml_element); } if (is_array($xml_element)) { $result_array = array(); if (count($xml_element) <= 0) { return (trim(strval($xml_element_copy))); } foreach($xml_element as $key=>$value) { $recursion_depth++; $result_array[strtolower($key)] = convert_xml_element_to_array($value, $recursion_depth); $recursion_depth--; } if ($recursion_depth == 0) { $temp_array = $result_array; $result_array = array( strtolower($xml_element_copy->getName()) => $temp_array, ); } return ($result_array); } else { return (trim(strval($xml_element))); } }} // Given an email style address, perform webfinger lookup and // return the resulting DFRN profile URL, or if no DFRN profile URL // is located, returns an OStatus subscription template (prefixed // with the string 'stat:' to identify it as on OStatus template). // If this isn't an email style address just return $s. // Return an empty string if email-style addresses but webfinger fails, // or if the resultant personal XRD doesn't contain a supported // subscription/friend-request attribute. if(! function_exists('webfinger_dfrn')) { function webfinger_dfrn($s) { if(! strstr($s,'@')) { return $s; } $links = webfinger($s); logger('webfinger_dfrn: ' . $s . ':' . print_r($links,true), LOGGER_DATA); if(count($links)) { foreach($links as $link) if($link['@attributes']['rel'] === NAMESPACE_DFRN) return $link['@attributes']['href']; foreach($links as $link) if($link['@attributes']['rel'] === NAMESPACE_OSTATUSSUB) return 'stat:' . $link['@attributes']['template']; } return ''; }} // Given an email style address, perform webfinger lookup and // return the array of link attributes from the personal XRD file. // On error/failure return an empty array. if(! function_exists('webfinger')) { function webfinger($s) { $host = ''; if(strstr($s,'@')) { $host = substr($s,strpos($s,'@') + 1); } if(strlen($host)) { $tpl = fetch_lrdd_template($host); logger('webfinger: lrdd template: ' . $tpl); if(strlen($tpl)) { $pxrd = str_replace('{uri}', urlencode('acct:' . $s), $tpl); logger('webfinger: pxrd: ' . $pxrd); $links = fetch_xrd_links($pxrd); if(! count($links)) { // try with double slashes $pxrd = str_replace('{uri}', urlencode('acct://' . $s), $tpl); logger('webfinger: pxrd: ' . $pxrd); $links = fetch_xrd_links($pxrd); } return $links; } } return array(); }} if(! function_exists('lrdd')) { function lrdd($uri) { $a = get_app(); // default priority is host priority, host-meta first $priority = 'host'; // All we have is an email address. Resource-priority is irrelevant // because our URI isn't directly resolvable. if(strstr($uri,'@')) { return(webfinger($uri)); } // get the host meta file $host = @parse_url($uri); if($host) { $url = ((x($host,'scheme')) ? $host['scheme'] : 'http') . '://'; $url .= $host['host'] . '/.well-known/host-meta' ; } else return array(); logger('lrdd: constructed url: ' . $url); $xml = fetch_url($url); $headers = $a->get_curl_headers(); if (! $xml) return array(); logger('lrdd: host_meta: ' . $xml, LOGGER_DATA); $h = parse_xml_string($xml); if(! $h) return array(); $arr = convert_xml_element_to_array($h); if(isset($arr['xrd']['property'])) { $property = $arr['crd']['property']; if(! isset($property[0])) $properties = array($property); else $properties = $property; foreach($properties as $prop) if((string) $prop['@attributes'] === 'http://lrdd.net/priority/resource') $priority = 'resource'; } // save the links in case we need them $links = array(); if(isset($arr['xrd']['link'])) { $link = $arr['xrd']['link']; if(! isset($link[0])) $links = array($link); else $links = $link; } // do we have a template or href? if(count($links)) { foreach($links as $link) { if($link['@attributes']['rel'] && attribute_contains($link['@attributes']['rel'],'lrdd')) { if(x($link['@attributes'],'template')) $tpl = $link['@attributes']['template']; elseif(x($link['@attributes'],'href')) $href = $link['@attributes']['href']; } } } if((! isset($tpl)) || (! strpos($tpl,'{uri}'))) $tpl = ''; if($priority === 'host') { if(strlen($tpl)) $pxrd = str_replace('{uri}', urlencode($uri), $tpl); elseif(isset($href)) $pxrd = $href; if(isset($pxrd)) { logger('lrdd: (host priority) pxrd: ' . $pxrd); $links = fetch_xrd_links($pxrd); return $links; } $lines = explode("\n",$headers); if(count($lines)) { foreach($lines as $line) { if((stristr($line,'link:')) && preg_match('/<([^>].*)>.*rel\=[\'\"]lrdd[\'\"]/',$line,$matches)) { return(fetch_xrd_links($matches[1])); break; } } } } // priority 'resource' $html = fetch_url($uri); $headers = $a->get_curl_headers(); logger('lrdd: headers=' . $headers, LOGGER_DEBUG); // don't try and parse raw xml as html if(! strstr($html,'<?xml')) { require_once('library/HTML5/Parser.php'); $dom = @HTML5_Parser::parse($html); if($dom) { $items = $dom->getElementsByTagName('link'); foreach($items as $item) { $x = $item->getAttribute('rel'); if($x == "lrdd") { $pagelink = $item->getAttribute('href'); break; } } } } if(isset($pagelink)) return(fetch_xrd_links($pagelink)); // next look in HTTP headers $lines = explode("\n",$headers); if(count($lines)) { foreach($lines as $line) { // TODO alter the following regex to support multiple relations (space separated) if((stristr($line,'link:')) && preg_match('/<([^>].*)>.*rel\=[\'\"]lrdd[\'\"]/',$line,$matches)) { $pagelink = $matches[1]; break; } // don't try and run feeds through the html5 parser if(stristr($line,'content-type:') && ((stristr($line,'application/atom+xml')) || (stristr($line,'application/rss+xml')))) return array(); if(stristr($html,'<rss') || stristr($html,'<feed')) return array(); } } if(isset($pagelink)) return(fetch_xrd_links($pagelink)); // If we haven't found any links, return the host xrd links (which we have already fetched) if(isset($links)) return $links; return array(); }} // Given a host name, locate the LRDD template from that // host. Returns the LRDD template or an empty string on // error/failure. if(! function_exists('fetch_lrdd_template')) { function fetch_lrdd_template($host) { $tpl = ''; $url1 = 'https://' . $host . '/.well-known/host-meta' ; $url2 = 'http://' . $host . '/.well-known/host-meta' ; $links = fetch_xrd_links($url1); logger('fetch_lrdd_template from: ' . $url1); logger('template (https): ' . print_r($links,true)); if(! count($links)) { logger('fetch_lrdd_template from: ' . $url2); $links = fetch_xrd_links($url2); logger('template (http): ' . print_r($links,true)); } if(count($links)) { foreach($links as $link) if($link['@attributes']['rel'] && $link['@attributes']['rel'] === 'lrdd') $tpl = $link['@attributes']['template']; } if(! strpos($tpl,'{uri}')) $tpl = ''; return $tpl; }} // Given a URL, retrieve the page as an XRD document. // Return an array of links. // on error/failure return empty array. if(! function_exists('fetch_xrd_links')) { function fetch_xrd_links($url) { $xrd_timeout = intval(get_config('system','xrd_timeout')); $redirects = 0; $xml = fetch_url($url,false,$redirects,(($xrd_timeout) ? $xrd_timeout : 30)); logger('fetch_xrd_links: ' . $xml, LOGGER_DATA); if ((! $xml) || (! stristr($xml,'<xrd'))) return array(); $h = parse_xml_string($xml); if(! $h) return array(); $arr = convert_xml_element_to_array($h); $links = array(); if(isset($arr['xrd']['link'])) { $link = $arr['xrd']['link']; if(! isset($link[0])) $links = array($link); else $links = $link; } if(isset($arr['xrd']['alias'])) { $alias = $arr['xrd']['alias']; if(! isset($alias[0])) $aliases = array($alias); else $aliases = $alias; if(count($aliases)) { foreach($aliases as $alias) { $links[]['@attributes'] = array('rel' => 'alias' , 'href' => $alias); } } } logger('fetch_xrd_links: ' . print_r($links,true), LOGGER_DATA); return $links; }} // Take a URL from the wild, prepend http:// if necessary // and check DNS to see if it's real // return true if it's OK, false if something is wrong with it if(! function_exists('validate_url')) { function validate_url(&$url) { if(substr($url,0,4) != 'http') $url = 'http://' . $url; $h = @parse_url($url); if(($h) && (dns_get_record($h['host'], DNS_A + DNS_CNAME + DNS_PTR))) { return true; } return false; }} // checks that email is an actual resolvable internet address if(! function_exists('validate_email')) { function validate_email($addr) { if(! strpos($addr,'@')) return false; $h = substr($addr,strpos($addr,'@') + 1); if(($h) && (dns_get_record($h, DNS_A + DNS_CNAME + DNS_PTR + DNS_MX))) { return true; } return false; }} // Check $url against our list of allowed sites, // wildcards allowed. If allowed_sites is unset return true; // If url is allowed, return true. // otherwise, return false if(! function_exists('allowed_url')) { function allowed_url($url) { $h = @parse_url($url); if(! $h) { return false; } $str_allowed = get_config('system','allowed_sites'); if(! $str_allowed) return true; $found = false; $host = strtolower($h['host']); // always allow our own site if($host == strtolower($_SERVER['SERVER_NAME'])) return true; $fnmatch = function_exists('fnmatch'); $allowed = explode(',',$str_allowed); if(count($allowed)) { foreach($allowed as $a) { $pat = strtolower(trim($a)); if(($fnmatch && fnmatch($pat,$host)) || ($pat == $host)) { $found = true; break; } } } return $found; }} // check if email address is allowed to register here. // Compare against our list (wildcards allowed). // Returns false if not allowed, true if allowed or if // allowed list is not configured. if(! function_exists('allowed_email')) { function allowed_email($email) { $domain = strtolower(substr($email,strpos($email,'@') + 1)); if(! $domain) return false; $str_allowed = get_config('system','allowed_email'); if(! $str_allowed) return true; $found = false; $fnmatch = function_exists('fnmatch'); $allowed = explode(',',$str_allowed); if(count($allowed)) { foreach($allowed as $a) { $pat = strtolower(trim($a)); if(($fnmatch && fnmatch($pat,$domain)) || ($pat == $domain)) { $found = true; break; } } } return $found; }} if(! function_exists('gravatar_img')) { function gravatar_img($email) { $size = 175; $opt = 'identicon'; // psuedo-random geometric pattern if not found $rating = 'pg'; $hash = md5(trim(strtolower($email))); $url = 'http://www.gravatar.com/avatar/' . $hash . '.jpg' . '?s=' . $size . '&d=' . $opt . '&r=' . $rating; logger('gravatar: ' . $email . ' ' . $url); return $url; }} if(! function_exists('parse_xml_string')) { function parse_xml_string($s,$strict = true) { if($strict) { if(! strstr($s,'<?xml')) return false; $s2 = substr($s,strpos($s,'<?xml')); } else $s2 = $s; libxml_use_internal_errors(true); $x = @simplexml_load_string($s2); if(! $x) { logger('libxml: parse: error: ' . $s2, LOGGER_DATA); foreach(libxml_get_errors() as $err) logger('libxml: parse: ' . $err->code." at ".$err->line.":".$err->column." : ".$err->message, LOGGER_DATA); libxml_clear_errors(); } return $x; }} function add_fcontact($arr) { $r = q("insert into fcontact ( `url`,`name`,`photo`,`request`,`nick`,`addr`, `notify`,`poll`,`confirm`,`network`,`alias`,`pubkey`,`updated` ) values('%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s')", dbesc($arr['url']), dbesc($arr['name']), dbesc($arr['photo']), dbesc($arr['request']), dbesc($arr['nick']), dbesc($arr['addr']), dbesc($arr['notify']), dbesc($arr['poll']), dbesc($arr['confirm']), dbesc($arr['network']), dbesc($arr['alias']), dbesc($arr['pubkey']), dbesc(datetime_convert()) ); return $r; }