sforkowany z mirror/friendica
clean up the salmon consumer bits
Mike Macgirvin
rodzic
81be82ddab
commit
a8a88d2532
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@ -43,49 +43,49 @@ function get_salmon_key($uri,$keyhash) {
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$a = get_app();
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$h = $a->get_curl_headers();
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if($debugging)
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file_put_contents('salmon.out', "\n" . 'Fetch key via HTML header: ' . $h . "\n", FILE_APPEND);
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file_put_contents('salmon.out', "\n" . 'Fetch key via HTTP header: ' . $h . "\n", FILE_APPEND);
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$l = explode("\n",$h);
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if(count($l)) {
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foreach($l as $line) {
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if($debugging)
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file_put_contents('salmon.out', "\n" . $line . "\n", FILE_APPEND);
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foreach($l as $line) {
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if((stristr($line,'link:')) && preg_match('/<([^>].*)>.*rel\=[\'\"]lrdd[\'\"]/',$line,$matches)) {
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$link = $matches[1];
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if($debugging)
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file_put_contents('salmon.out', "\n" . 'Fetch key via Link from header: ' . $link . "\n", FILE_APPEND);
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file_put_contents('salmon.out', "\n" . 'Fetch key via HTML Link: ' . $link . "\n", FILE_APPEND);
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break;
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}
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}
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}
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}
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if(! isset($link)) {
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require_once('library/HTML5/Parser.php');
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$dom = HTML5_Parser::parse($html);
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if(! isset($link)) {
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if(! $dom)
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return '';
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// parse the page of the supplied URL looking for rel links
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$items = $dom->getElementsByTagName('link');
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require_once('library/HTML5/Parser.php');
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$dom = HTML5_Parser::parse($html);
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foreach($items as $item) {
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$x = $item->getAttribute('rel');
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if($x == "lrdd") {
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$link = $item->getAttribute('href');
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if($debugging)
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file_put_contents('salmon.out', "\n" . 'Fetch key via HTML body' . $link . "\n", FILE_APPEND);
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break;
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if(! $dom)
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return '';
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$items = $dom->getElementsByTagName('link');
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foreach($items as $item) {
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$x = $item->getAttribute('rel');
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if($x == "lrdd") {
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$link = $item->getAttribute('href');
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if($debugging)
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file_put_contents('salmon.out', "\n" . 'Fetch key via HTML body' . $link . "\n", FILE_APPEND);
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break;
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}
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}
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}
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if(! isset($link))
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return '';
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$arr = fetch_xrd_links($link);
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}
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if(! isset($link))
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return '';
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$arr = fetch_xrd_links($link);
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if($arr) {
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foreach($arr as $a) {
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if($a['@attributes']['rel'] === 'magic-public-key') {
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@ -93,6 +93,13 @@ function get_salmon_key($uri,$keyhash) {
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}
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}
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}
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else {
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return '';
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}
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// We have found at least one key URL
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// If it's inline, parse it - otherwise get the key
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if(count($ret)) {
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for($x = 0; $x < count($ret); $x ++) {
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if(substr($ret[$x],0,5) === 'data:') {
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@ -105,10 +112,18 @@ function get_salmon_key($uri,$keyhash) {
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$ret[$x] = fetch_url($ret[$x]);
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}
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}
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if($debugging)
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file_put_contents('salmon.out', "\n" . 'Key located: ' . print_r($ret,true) . "\n", FILE_APPEND);
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if(count($ret) == 1) {
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// We only found one one key so we don't care if the hash matches.
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// If it's the wrong key we'll find out soon enough because
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// message verification will fail. This also covers some older
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// software which don't supply a keyhash. As long as they only
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// have one key we'll be right.
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return $ret[0];
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}
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else {
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@ -1,7 +1,7 @@
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<?php
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// TODO: pass keyhash to key discovery
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// TODO:
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// add relevant contacts so they can use this
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// There is a lot of debug stuff in here because this is quite a
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@ -68,24 +68,30 @@ function salmon_post(&$a) {
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$signature = base64url_decode($base->sig);
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if($debugging)
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file_put_contents('salmon.out', "\n" . 'Encoded Signature: ' . $base->sig . "\n" , FILE_APPEND);
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// unpack our data element.
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// unpack the data
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// strip whitespace
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// strip whitespace so our data element will return to one big base64 blob
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$data = str_replace(array(" ","\t","\r","\n"),array("","","",""),$base->data);
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// stash away some other stuff for later
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$type = $base->data[0]->attributes()->type[0];
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$keyhash = $base->sig[0]->attributes()->keyhash[0];
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$encoding = $base->encoding;
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$alg = $base->alg;
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$signed_data = $data;
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// . '.' . base64url_encode($type) . '.' . base64url_encode($encoding) . '.' . base64url_encode($alg);
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// decode it
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$data = base64url_decode($data);
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// If we're talking to status.net or one of their ilk, they aren't following the magic envelope spec
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// and only signed the data element. We'll be nice and let them validate anyway.
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if($debugging)
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file_put_contents('salmon.out', "\n" . 'Signed data:>>>' . $signed_data . "<<<\n" , FILE_APPEND);
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$stnet_signed_data = $data;
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$signed_data = $data . '.' . base64url_encode($type) . '.' . base64url_encode($encoding) . '.' . base64url_encode($alg);
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// decode the data
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$data = base64url_decode($data);
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// Remove the xml declaration
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$data = preg_replace('/\<\?xml[^\?].*\?\>/','',$data);
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@ -128,7 +134,7 @@ function salmon_post(&$a) {
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salmon_return(500);
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}
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// Once we have the author URI, go to the web and find their public key
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// Once we have the author URI, go to the web and try to find their public key
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if($debugging) {
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file_put_contents('salmon.out', "\n" . 'Fetching key for ' . $author_link . "\n", FILE_APPEND);
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@ -152,6 +158,7 @@ function salmon_post(&$a) {
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$m = base64url_decode($key_info[1]);
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$e = base64url_decode($key_info[2]);
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if($debugging)
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file_put_contents('salmon.out',"\n" . print_r($key_info,true) . "\n", FILE_APPEND);
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@ -164,9 +171,14 @@ function salmon_post(&$a) {
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$rsa->exponent = new Math_BigInteger($e, 256);
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// We should have everything we need now. Let's see if it verifies.
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// If it fails with the proper data format, try again using just the data
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// (e.g. status.net)
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$verify = $rsa->verify($signed_data,$signature);
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if(! $verify)
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$verify = $rsa->verify($stnet_signed_data,$signature);
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if(! $verify) {
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if($debugging)
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file_put_contents('salmon.out',"\n" . 'Message did not verify. Discarding.' . "\n", FILE_APPEND);
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@ -193,9 +205,11 @@ function salmon_post(&$a) {
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salmon_return(500);
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}
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require_once('include/items.php');
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// Placeholder for hub discovery. We shouldn't find any hubs
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// since we supplied the fake feed header - and it doesn't have any.
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$hub = '';
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consume_feed($feedxml,$importer,$r[0],$hub);
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