<?php
-require_once('library/asn1.php');
+use Friendica\Network\Probe;
-function salmon_key($pubkey) {
- $lines = explode("\n",$pubkey);
- unset($lines[0]);
- unset($lines[count($lines)]);
- $x = base64_decode(implode('',$lines));
+require_once 'include/crypto.php';
- $r = ASN_BASE::parseASNString($x);
-
- $m = $r[0]->asnData[1]->asnData[0]->asnData[0]->asnData;
- $e = $r[0]->asnData[1]->asnData[0]->asnData[1]->asnData;
-
-
- return 'RSA' . '.' . $m . '.' . $e ;
-}
-
-
-function base64url_encode($s, $strip_padding = false) {
-
- $s = strtr(base64_encode($s),'+/','-_');
-
- if($strip_padding)
- $s = str_replace('=','',$s);
-
- return $s;
-}
-
-function base64url_decode($s) {
-
-/*
- * // Placeholder for new rev of salmon which strips base64 padding.
- * // PHP base64_decode handles the un-padded input without requiring this step
- * // Uncomment if you find you need it.
- *
- * $l = strlen($s);
- * if(! strpos($s,'=')) {
- * $m = $l % 4;
- * if($m == 2)
- * $s .= '==';
- * if($m == 3)
- * $s .= '=';
- * }
- *
- */
-
- return base64_decode(strtr($s,'-_','+/'));
-}
-
-function get_salmon_key($uri,$keyhash) {
+function get_salmon_key($uri, $keyhash) {
$ret = array();
- logger('Fetching salmon key');
+ logger('Fetching salmon key for '.$uri);
- $arr = lrdd($uri);
+ $arr = Probe::lrdd($uri);
- if(is_array($arr)) {
- foreach($arr as $a) {
- if($a['@attributes']['rel'] === 'magic-public-key') {
+ if (is_array($arr)) {
+ foreach ($arr as $a) {
+ if ($a['@attributes']['rel'] === 'magic-public-key') {
$ret[] = $a['@attributes']['href'];
}
}
- }
- else {
+ } else {
return '';
}
// We have found at least one key URL
// If it's inline, parse it - otherwise get the key
- if(count($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
+ if (count($ret) > 0) {
+ for ($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);
+ }
+ } elseif (normalise_link($ret[$x]) == 'http://') {
$ret[$x] = fetch_url($ret[$x]);
+ }
}
}
- logger('Key located: ' . print_r($ret,true));
+ logger('Key located: ' . print_r($ret, true));
- if(count($ret) == 1) {
+ if (count($ret) == 1) {
// We only found one one key so we don't care if the hash matches.
- // If it's the wrong key we'll find out soon enough because
- // message verification will fail. This also covers some older
+ // If it's the wrong key we'll find out soon enough because
+ // message verification will fail. This also covers some older
// software which don't supply a keyhash. As long as they only
- // have one key we'll be right.
+ // have one key we'll be right.
return $ret[0];
- }
- else {
- foreach($ret as $a) {
- $hash = base64url_encode(hash('sha256',$a));
- if($hash == $keyhash)
+ } else {
+ foreach ($ret as $a) {
+ $hash = base64url_encode(hash('sha256', $a));
+ if ($hash == $keyhash) {
return $a;
+ }
}
}
return '';
}
-
-
-function slapper($owner,$url,$slap) {
- logger('slapper called. Data: ' . $slap);
- // does contact have a salmon endpoint?
+function slapper($owner, $url, $slap) {
+
+ // does contact have a salmon endpoint?
- if(! strlen($url))
+ if (! strlen($url)) {
return;
+ }
+
+ if (! $owner['sprvkey']) {
+ logger(sprintf("user '%s' (%d) does not have a salmon private key. Send failed.",
+ $owner['username'], $owner['uid']));
+ return;
+ }
+
+ logger('slapper called for '.$url.'. Data: ' . $slap);
- // add all namespaces to item
-
-$namespaces = <<< EOT
-<entry xmlns="http://www.w3.org/2005/Atom"
- xmlns:thr="http://purl.org/syndication/thread/1.0"
- xmlns:at="http://purl.org/atompub/tombstones/1.0"
- xmlns:media="http://purl.org/syndication/atommedia"
- xmlns:dfrn="http://purl.org/macgirvin/dfrn/1.0"
- xmlns:as="http://activitystrea.ms/spec/1.0/"
- xmlns:georss="http://www.georss.org/georss"
- xmlns:poco="http://portablecontacts.net/spec/1.0"
- xmlns:ostatus="http://ostatus.org/schema/1.0" >
-EOT;
-
- $slap = str_replace('<entry>',$namespaces,$slap);
-
// create a magic envelope
$data = base64url_encode($slap);
$data_type = 'application/atom+xml';
$encoding = 'base64url';
$algorithm = 'RSA-SHA256';
- $keyhash = base64url_encode(hash('sha256',salmon_key($owner['spubkey'])));
-
- // Setup RSA stuff to PKCS#1 sign the data
+ $keyhash = base64url_encode(hash('sha256', salmon_key($owner['spubkey'])), true);
- set_include_path(get_include_path() . PATH_SEPARATOR . 'phpsec');
+ $precomputed = '.' . base64url_encode($data_type) . '.' . base64url_encode($encoding) . '.' . base64url_encode($algorithm);
- require_once('phpsec/Crypt/RSA.php');
+ // GNU Social format
+ $signature = base64url_encode(rsa_sign($data . $precomputed, $owner['sprvkey']));
- $rsa = new CRYPT_RSA();
- $rsa->signatureMode = CRYPT_RSA_SIGNATURE_PKCS1;
- $rsa->setHash('sha256');
- $rsa->loadKey($owner['sprvkey']);
+ // Compliant format
+ $signature2 = base64url_encode(rsa_sign(str_replace('=', '', $data . $precomputed), $owner['sprvkey']));
- // precomputed base64url encoding of data_type, encoding, algorithm concatenated with periods
+ // Old Status.net format
+ $signature3 = base64url_encode(rsa_sign($data, $owner['sprvkey']));
- $precomputed = '.YXBwbGljYXRpb24vYXRvbSt4bWw=.YmFzZTY0dXJs.UlNBLVNIQTI1Ng==';
+ // At first try the non compliant method that works for GNU Social
+ $xmldata = array("me:env" => array("me:data" => $data,
+ "@attributes" => array("type" => $data_type),
+ "me:encoding" => $encoding,
+ "me:alg" => $algorithm,
+ "me:sig" => $signature,
+ "@attributes2" => array("key_id" => $keyhash)));
- $signature = base64url_encode($rsa->sign($data . $precomputed));
+ $namespaces = array("me" => "http://salmon-protocol.org/ns/magic-env");
- $signature2 = base64url_encode($rsa->sign($data));
+ $salmon = xml::from_array($xmldata, $xml, false, $namespaces);
- $salmon_tpl = get_markup_template('magicsig.tpl');
- $salmon = replace_macros($salmon_tpl,array(
- '$data' => $data,
- '$encoding' => $encoding,
- '$algorithm' => $algorithm,
- '$keyhash' => $keyhash,
- '$signature' => $signature
- ));
-
- // slap them
- post_url($url,$salmon, array(
+ // slap them
+ post_url($url, $salmon, array(
'Content-type: application/magic-envelope+xml',
'Content-length: ' . strlen($salmon)
));
// check for success, e.g. 2xx
- if($return_code > 299) {
+ if ($return_code > 299) {
+
+ logger('GNU Social salmon failed. Falling back to compliant mode');
- logger('slapper: compliant salmon failed. Falling back to status.net hack');
+ // Now try the compliant mode that normally isn't used for GNU Social
+ $xmldata = array("me:env" => array("me:data" => $data,
+ "@attributes" => array("type" => $data_type),
+ "me:encoding" => $encoding,
+ "me:alg" => $algorithm,
+ "me:sig" => $signature2,
+ "@attributes2" => array("key_id" => $keyhash)));
- // Entirely likely that their salmon implementation is
- // non-compliant. Let's try once more, this time only signing
- // the data, without the precomputed blob
+ $namespaces = array("me" => "http://salmon-protocol.org/ns/magic-env");
- $salmon = replace_macros($salmon_tpl,array(
- '$data' => $data,
- '$encoding' => $encoding,
- '$algorithm' => $algorithm,
- '$keyhash' => $keyhash,
- '$signature' => $signature2
+ $salmon = xml::from_array($xmldata, $xml, false, $namespaces);
+
+ // slap them
+ post_url($url, $salmon, array(
+ 'Content-type: application/magic-envelope+xml',
+ 'Content-length: ' . strlen($salmon)
));
+ $return_code = $a->get_curl_code();
+ }
- // slap them
- post_url($url,$salmon, array(
+ if ($return_code > 299) {
+ logger('compliant salmon failed. Falling back to old status.net');
+
+ // Last try. This will most likely fail as well.
+ $xmldata = array("me:env" => array("me:data" => $data,
+ "@attributes" => array("type" => $data_type),
+ "me:encoding" => $encoding,
+ "me:alg" => $algorithm,
+ "me:sig" => $signature3,
+ "@attributes2" => array("key_id" => $keyhash)));
+
+ $namespaces = array("me" => "http://salmon-protocol.org/ns/magic-env");
+
+ $salmon = xml::from_array($xmldata, $xml, false, $namespaces);
+
+ // slap them
+ post_url($url, $salmon, array(
'Content-type: application/magic-envelope+xml',
'Content-length: ' . strlen($salmon)
));
$return_code = $a->get_curl_code();
+ }
+ logger('slapper for '.$url.' returned ' . $return_code);
+
+ if (! $return_code) {
+ return -1;
+ }
+
+ if (($return_code == 503) && (stristr($a->get_curl_headers(), 'retry-after'))) {
+ return -1;
}
- logger('slapper returned ' . $return_code);
- if(! $return_code)
- return(-1);
+
return ((($return_code >= 200) && ($return_code < 300)) ? 0 : 1);
}
-
projects / friendica.git / blobdiff