diff options
Diffstat (limited to 'include/salmon.php')
| -rw-r--r-- | include/salmon.php | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/include/salmon.php b/include/salmon.php index 7198f07c6..bd2d620a8 100644 --- a/include/salmon.php +++ b/include/salmon.php @@ -16,3 +16,112 @@ function salmon_key($pubkey) { return 'RSA' . '.' . $m . '.' . $e ; } + + +function base64url_encode($s) { + return strtr(base64_encode($s),'+/','-_'); +} + +function base64url_decode($s) { + return base64_decode(strtr($s,'-_','+/')); +} + +function get_salmon_key($uri,$keyhash) { + $ret = array(); + + $debugging = get_config('system','debugging'); + if($debugging) + file_put_contents('salmon.out', "\n" . 'Fetch key' . "\n", FILE_APPEND); + + if(strstr($uri,'@')) { + $arr = webfinger($uri); + if($debugging) + file_put_contents('salmon.out', "\n" . 'Fetch key from webfinger' . "\n", FILE_APPEND); + } + else { + $html = fetch_url($uri); + $a = get_app(); + $h = $a->get_curl_headers(); + if($debugging) + file_put_contents('salmon.out', "\n" . 'Fetch key via HTML header: ' . $h . "\n", FILE_APPEND); + + $l = explode("\n",$h); + if(count($l)) { + foreach($l as $line) { + + if($debugging) + file_put_contents('salmon.out', "\n" . $line . "\n", FILE_APPEND); + if((stristr($line,'link:')) && preg_match('/<([^>].*)>.*rel\=[\'\"]lrdd[\'\"]/',$line,$matches)) { + $link = $matches[1]; + if($debugging) + file_put_contents('salmon.out', "\n" . 'Fetch key via Link from header: ' . $link . "\n", FILE_APPEND); + break; + } + } + } + } + + if(! isset($link)) { + require_once('library/HTML5/Parser.php'); + $dom = HTML5_Parser::parse($html); + + if(! $dom) + return ''; + + $items = $dom->getElementsByTagName('link'); + + foreach($items as $item) { + $x = $item->getAttribute('rel'); + if($x == "lrdd") { + $link = $item->getAttribute('href'); + if($debugging) + file_put_contents('salmon.out', "\n" . 'Fetch key via HTML body' . $link . "\n", FILE_APPEND); + break; + } + } + } + + if(! isset($link)) + return ''; + + $arr = fetch_xrd_links($link); + + if($arr) { + foreach($arr as $a) { + if($a['@attributes']['rel'] === 'magic-public-key') { + $ret[] = $a['@attributes']['href']; + } + } + } + if(count($ret)) { + for($x = 0; $x < count($ret); $x ++) { + if(substr($ret[$x],0,5) === 'data:') { + if(strstr($ret[$x],',')) + $ret[$x] = substr($ret[$x],strpos($ret[$x],',')+1); + else + $ret[$x] = substr($ret[$x],5); + } + else + $ret[$x] = fetch_url($ret[$x]); + } + } + if($debugging) + file_put_contents('salmon.out', "\n" . 'Key located: ' . print_r($ret,true) . "\n", FILE_APPEND); + + if(count($ret) == 1) { + return $ret[0]; + } + else { + foreach($ret as $a) { + $hash = base64url_encode(hash('sha256',$a)); + if($hash == $keyhash) + return $a; + } + } + + return ''; +} + + + +
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