Diaspora: Accept new Salmon format

include/Probe.php

@@ -174,6 +174,9 @@ class Probe {
 				return array();
 
 			$host = $parts["host"];
+			if (isset($parts["port"])) {
+				$host .= ':'.$parts["port"];
+			}
 
 			$path_parts = explode("/", trim($parts["path"], "/"));
 
@@ -334,8 +337,10 @@ class Probe {
 
 		if (isset($parts["scheme"]) AND isset($parts["host"]) AND isset($parts["path"])) {
 
-			/// @todo: Ports?
 			$host = $parts["host"];
+			if (isset($parts["port"])) {
+				$host .= ':'.$parts["port"];
+			}
 
 			if ($host == 'twitter.com') {
 				return array("network" => NETWORK_TWITTER);

include/diaspora.php

@@ -187,7 +187,80 @@ class Diaspora {
 	}
 
 	/**
-	 * @brief: Decodes incoming Diaspora message
+	 * @brief: Decodes incoming Diaspora message in the new format
+	 *
+	 * @param array $importer Array of the importer user
+	 * @param string $raw raw post message
+	 *
+	 * @return array
+	 * 'message' -> decoded Diaspora XML message
+	 * 'author' -> author diaspora handle
+	 * 'key' -> author public key (converted to pkcs#8)
+	 */
+	public static function decode_raw($importer, $raw) {
+		$data = json_decode($raw);
+
+		// Is it a private post? Then decrypt the outer Salmon
+		if (is_object($data)) {
+			$encrypted_aes_key_bundle = base64_decode($data->aes_key);
+			$ciphertext = base64_decode($data->encrypted_magic_envelope);
+
+			$outer_key_bundle = '';
+			@openssl_private_decrypt($encrypted_aes_key_bundle, $outer_key_bundle, $importer['prvkey']);
+			$j_outer_key_bundle = json_decode($outer_key_bundle);
+
+			if (!is_object($j_outer_key_bundle)) {
+				logger('Outer Salmon did not verify. Discarding.');
+				http_status_exit(400);
+			}
+
+			$outer_iv = base64_decode($j_outer_key_bundle->iv);
+			$outer_key = base64_decode($j_outer_key_bundle->key);
+
+			$xml = diaspora::aes_decrypt($outer_key, $outer_iv, $ciphertext);
+		} else {
+			$xml = $raw;
+		}
+
+		$basedom = parse_xml_string($xml);
+
+		if (!is_object($basedom)) {
+			logger('Received data does not seem to be an XML. Discarding.');
+			http_status_exit(400);
+		}
+
+		$base = $basedom->children(NAMESPACE_SALMON_ME);
+
+		// Not sure if this cleaning is needed
+		$data = str_replace(array(" ", "\t", "\r", "\n"), array("", "", "", ""), $base->data);
+
+		// Build the signed data
+		$type = $base->data[0]->attributes()->type[0];
+		$encoding = $base->encoding;
+		$alg = $base->alg;
+		$signed_data = $data.'.'.base64url_encode($type).'.'.base64url_encode($encoding).'.'.base64url_encode($alg);
+
+		// This is the signature
+		$signature = base64url_decode($base->sig);
+
+		// Get the senders' public key
+		$key_id = $base->sig[0]->attributes()->key_id[0];
+		$author_addr = base64_decode($key_id);
+		$key = diaspora::key($author_addr);
+
+		$verify = rsa_verify($signed_data, $signature, $key);
+		if (!$verify) {
+			logger('Message did not verify. Discarding.');
+			http_status_exit(400);
+		}
+
+		return array('message' => (string)base64url_decode($base->data),
+				'author' => unxmlify($author_addr),
+				'key' => (string)$key);
+	}
+
+	/**
+	 * @brief: Decodes incoming Diaspora message in the deprecated format
 	 *
 	 * @param array $importer Array of the importer user
 	 * @param string $xml urldecoded Diaspora salmon
@@ -202,9 +275,10 @@ class Diaspora {
 		$public = false;
 		$basedom = parse_xml_string($xml);
 
-		if (!is_object($basedom))
+		if (!is_object($basedom)) {
+			logger("XML is not parseable.");
 			return false;
-
+		}
 		$children = $basedom->children('https://joindiaspora.com/protocol');
 
 		if ($children->header) {

mod/receive.php

@@ -11,30 +11,27 @@ require_once('include/diaspora.php');
 
 
 function receive_post(App $a) {
-
+	$enabled = intval(get_config('system', 'diaspora_enabled'));
-
+	if (!$enabled) {
-	$enabled = intval(get_config('system','diaspora_enabled'));
-	if(! $enabled) {
 		logger('mod-diaspora: disabled');
 		http_status_exit(500);
 	}
 
 	$public = false;
 
-	if(($a->argc == 2) && ($a->argv[1] === 'public')) {
+	if (($a->argc == 2) && ($a->argv[1] === 'public')) {
 		$public = true;
-	}
+	} else {
-	else {
 
-		if($a->argc != 3 || $a->argv[1] !== 'users')
+		if ($a->argc != 3 || $a->argv[1] !== 'users') {
 			http_status_exit(500);
-
+		}
 		$guid = $a->argv[2];
 
 		$r = q("SELECT * FROM `user` WHERE `guid` = '%s' AND `account_expired` = 0 AND `account_removed` = 0 LIMIT 1",
 			dbesc($guid)
 		);
-		if (! dbm::is_result($r)) {
+		if (!dbm::is_result($r)) {
 			http_status_exit(500);
 		}
 
@@ -47,29 +44,34 @@ function receive_post(App $a) {
 
 	$xml = urldecode($_POST['xml']);
 
-	logger('mod-diaspora: new salmon ' . $xml, LOGGER_DATA);
+	if (!$xml) {
+		$postdata = file_get_contents("php://input");
+	        if ($postdata == '') {
+			http_status_exit(500);
+		}
 
-	if(! $xml)
+		logger('mod-diaspora: message is in the new format', LOGGER_DEBUG);
-		http_status_exit(500);
+		$msg = Diaspora::decode_raw($importer, $postdata);
-
+	} else {
-	logger('mod-diaspora: message is okay', LOGGER_DEBUG);
+		logger('mod-diaspora: message is in the old format', LOGGER_DEBUG);
-
+		$msg = Diaspora::decode($importer, $xml);
-	$msg = Diaspora::decode($importer,$xml);
+	}
 
 	logger('mod-diaspora: decoded', LOGGER_DEBUG);
 
-	logger('mod-diaspora: decoded msg: ' . print_r($msg,true), LOGGER_DATA);
+	logger('mod-diaspora: decoded msg: ' . print_r($msg, true), LOGGER_DATA);
 
-	if(! is_array($msg))
+	if (!is_array($msg)) {
 		http_status_exit(500);
+	}
 
 	logger('mod-diaspora: dispatching', LOGGER_DEBUG);
 
 	$ret = 0;
-	if($public) {
+	if ($public) {
 		Diaspora::dispatch_public($msg);
 	} else {
-		$ret = Diaspora::dispatch($importer,$msg);
+		$ret = Diaspora::dispatch($importer, $msg);
 	}
 
 	http_status_exit(($ret) ? $ret : 200);