From e4c462570f8010f751caf214f329617c08bf7105 Mon Sep 17 00:00:00 2001
From: James Walker <walkah@walkah.net>
Date: Fri, 26 Feb 2010 15:39:30 -0500
Subject: [PATCH] move salmon posting to send application/magic-envelope+xml
 per
 http://salmon-protocol.googlecode.com/svn/trunk/draft-panzer-salmon-00.html#RPF

---
 plugins/OStatus/lib/magicenvelope.php | 22 ++++++++++++++++++++++
 plugins/OStatus/lib/salmon.php        | 18 +++++++++++-------
 plugins/OStatus/lib/salmonaction.php  | 26 ++++++++++++++------------
 3 files changed, 47 insertions(+), 19 deletions(-)

diff --git a/plugins/OStatus/lib/magicenvelope.php b/plugins/OStatus/lib/magicenvelope.php
index f33119b8f7..230d81ba1f 100644
--- a/plugins/OStatus/lib/magicenvelope.php
+++ b/plugins/OStatus/lib/magicenvelope.php
@@ -83,6 +83,28 @@ class MagicEnvelope
             
     }
 
+    public function toXML($env) {
+        $dom = new DOMDocument();
+
+        $envelope = $dom->createElementNS(MagicEnvelope::NS, 'me:env');
+        $envelope->setAttribute('xmlns:me', MagicEnvelope::NS);
+        $data = $dom->createElementNS(MagicEnvelope::NS, 'me:data', $env['data']);
+        $data->setAttribute('type', $env['data_type']);
+        $envelope->appendChild($data);
+        $enc = $dom->createElementNS(MagicEnvelope::NS, 'me:encoding', $env['encoding']);
+        $envelope->appendChild($enc);
+        $alg = $dom->createElementNS(MagicEnvelope::NS, 'me:alg', $env['alg']);
+        $envelope->appendChild($alg);
+        $sig = $dom->createElementNS(MagicEnvelope::NS, 'me:sig', $env['sig']);
+        $envelope->appendChild($sig);
+
+        $dom->appendChild($envelope);
+        
+        
+        return $dom->saveXML();
+    }
+
+    
     public function unfold($env)
     {
         $dom = new DOMDocument();
diff --git a/plugins/OStatus/lib/salmon.php b/plugins/OStatus/lib/salmon.php
index 6e24595441..68883a410f 100644
--- a/plugins/OStatus/lib/salmon.php
+++ b/plugins/OStatus/lib/salmon.php
@@ -48,12 +48,17 @@ class Salmon
             return false;
         }
 
-        if (!common_config('ostatus', 'skip_signatures')) {
+        try {
             $xml = $this->createMagicEnv($xml, $actor);
+        } catch (Exception $e) {
+            common_log(LOG_ERR, "Salmon unable to sign: " . $e->getMessage());
+            return false;
         }
 
-        $headers = array('Content-Type: application/atom+xml');
+        $headers = array('Content-Type: application/magic-envelope+xml');
 
+        common_log(LOG_DEBUG, "Salmon: going to post " . $xml);
+        
         try {
             $client = new HTTPClient();
             $client->setBody($xml);
@@ -72,7 +77,6 @@ class Salmon
 
     public function createMagicEnv($text, $actor)
     {
-        common_log(LOG_DEBUG, "Got actor as : ". print_r($actor, true));
         $magic_env = new MagicEnvelope();
 
         $user = User::staticGet('id', $actor->id);
@@ -84,7 +88,6 @@ class Salmon
                 $magickey = new Magicsig();
                 $magickey->generate($user->id);
             } 
-            common_log(LOG_DEBUG, "Salmon: Loaded key for ". $user->id);
         } else {
             throw new Exception("Salmon invalid actor for signing");
         }
@@ -95,15 +98,16 @@ class Salmon
             common_log(LOG_ERR, "Salmon signing failed: ". $e->getMessage());
             return $text;
         }
-        return $magic_env->unfold($env);
+        return $magic_env->toXML($env);
     }
 
 
-    public function verifyMagicEnv($dom)
+    public function verifyMagicEnv($text)
     {
+        common_log(LOG_DEBUG, "Going to verify ". $text);
         $magic_env = new MagicEnvelope();
         
-        $env = $magic_env->fromDom($dom);
+        $env = $magic_env->parse($text);
 
         return $magic_env->verify($env);
     }
diff --git a/plugins/OStatus/lib/salmonaction.php b/plugins/OStatus/lib/salmonaction.php
index a03169101b..9ca350e671 100644
--- a/plugins/OStatus/lib/salmonaction.php
+++ b/plugins/OStatus/lib/salmonaction.php
@@ -41,29 +41,31 @@ class SalmonAction extends Action
             $this->clientError(_m('This method requires a POST.'));
         }
 
-        if (empty($_SERVER['CONTENT_TYPE']) || $_SERVER['CONTENT_TYPE'] != 'application/atom+xml') {
-            $this->clientError(_m('Salmon requires application/atom+xml'));
+        if (empty($_SERVER['CONTENT_TYPE']) || $_SERVER['CONTENT_TYPE'] != 'application/magic-envelope+xml') {
+            $this->clientError(_m('Salmon requires application/magic-envelope+xml'));
         }
 
         $xml = file_get_contents('php://input');
 
-        $dom = DOMDocument::loadXML($xml);
 
+        // Check the signature
+        $salmon = new Salmon;
+        if (!$salmon->verifyMagicEnv($xml)) {
+            common_log(LOG_DEBUG, "Salmon signature verification failed.");
+            $this->clientError(_m('Salmon signature verification failed.'));
+        } else {
+            $env = MagicEnvelope::parse($xml);
+            $xml = MagicEnvelope::unfold($env);
+        }
+        
+
+        $dom = DOMDocument::loadXML($xml);
         if ($dom->documentElement->namespaceURI != Activity::ATOM ||
             $dom->documentElement->localName != 'entry') {
             common_log(LOG_DEBUG, "Got invalid Salmon post: $xml");
             $this->clientError(_m('Salmon post must be an Atom entry.'));
         }
 
-        // Check the signature
-        $salmon = new Salmon;
-        if (!common_config('ostatus', 'skip_signatures')) {
-            if (!$salmon->verifyMagicEnv($dom)) {
-                common_log(LOG_DEBUG, "Salmon signature verification failed.");
-                $this->clientError(_m('Salmon signature verification failed.'));
-            }
-        }
-
         $this->act = new Activity($dom->documentElement);
         return true;
     }