bring Diaspora message signing back to the source author - whether they like it or not.

boot.php

@@ -7,7 +7,7 @@ require_once('include/text.php');
 require_once("include/pgettext.php");
 
 
-define ( 'FRIENDIKA_VERSION',      '2.2.1085' );
+define ( 'FRIENDIKA_VERSION',      '2.2.1086' );
 define ( 'DFRN_PROTOCOL_VERSION',  '2.21'    );
 define ( 'DB_UPDATE_VERSION',      1083      );
 

include/delivery.php

@@ -77,7 +77,10 @@ function delivery_run($argv, $argc){
 		$uid = $r[0]['uid'];
 		$updated = $r[0]['edited'];
 
-		$items = q("SELECT * FROM `item` WHERE `parent` = %d ORDER BY `id` ASC",
+
+
+		$items = q("SELECT `item`.*, `sign`.`signed_text`,`sign`.`signature`,`sign`.`signer` 
+			FROM `item` LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id` WHERE `parent` = %d ORDER BY `id` ASC",
 			intval($parent_id)
 		);
 

include/diaspora.php

@@ -1063,18 +1063,6 @@ function diaspora_send_relay($item,$owner,$contact) {
 
 	$body = $item['body'];
 
-	$itemcontact = q("select * from contact where `id` = %d limit 1",
-		intval($item['contact-id'])
-	);
-	if(count($itemcontact)) {
-		if(! $itemcontact[0]['self']) {
-			$prefix = sprintf( t('[Relayed] Comment authored by %s from network %s'),
-				'['. $item['author-name'] . ']' . '(' . $item['author-link'] . ')',  
-				network_to_name($itemcontact['network'])) . "\n";
-			$body = $prefix . $body;
-		}
-	}
-
 	$text = html_entity_decode(bb2diaspora($body));
 
 	// fetch the original signature	if somebody sent the post to us to relay
@@ -1092,8 +1080,18 @@ function diaspora_send_relay($item,$owner,$contact) {
 	}
 	else {
 
-
+		$itemcontact = q("select * from contact where `id` = %d limit 1",
-
+			intval($item['contact-id'])
+		);
+		if(count($itemcontact)) {
+			if(! $itemcontact[0]['self']) {
+				$prefix = sprintf( t('[Relayed] Comment authored by %s from network %s'),
+					'['. $item['author-name'] . ']' . '(' . $item['author-link'] . ')',  
+					network_to_name($itemcontact['network'])) . "\n";
+				$body = $prefix . $body;
+			}
+		}
+		else {
 
 			if($like)
 				$signed_text = $item['guid'] . ';' . $target_type . ';' . $parent_guid . ';' . $positive . ';' . $myaddr;
@@ -1110,6 +1108,7 @@ function diaspora_send_relay($item,$owner,$contact) {
 			);
 
 		}
+	}
 
 	// sign it
 

include/items.php

@@ -112,8 +112,10 @@ function get_feed_for(&$a, $dfrn_id, $owner_nick, $last_update, $direction = 0)
 		`contact`.`name`, `contact`.`photo`, `contact`.`url`, 
 		`contact`.`name-date`, `contact`.`uri-date`, `contact`.`avatar-date`,
 		`contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`, 
-		`contact`.`id` AS `contact-id`, `contact`.`uid` AS `contact-uid`
+		`contact`.`id` AS `contact-id`, `contact`.`uid` AS `contact-uid`,
+		`sign`.`signed_text`, `sign`.`signature`, `sign`.`signer`
 		FROM `item` LEFT JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
+		LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`
 		WHERE `item`.`uid` = %d AND `item`.`visible` = 1 AND `item`.`parent` != 0 
 		AND `item`.`wall` = 1 AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0
 		AND ( `item`.`edited` > '%s' OR `item`.`changed` > '%s' )
@@ -363,6 +365,18 @@ function get_atom_elements($feed,$item) {
 			$res['app'] = 'OStatus';
 	}		   
 
+	// base64 encoded json structure representing Diaspora signature
+
+	$dsig = $item->get_item_tags(NAMESPACE_DFRN,'diaspora_signature');
+	if($dsig) {
+		$res['dsprsig'] = unxmlify($dsig[0]['data']);
+	}
+
+	$dguid = $item->get_item_tags(NAMESPACE_DFRN,'diaspora_guid');
+	if($dguid)
+		$res['guid'] = unxmlify($dguid[0]['data']);
+
+
 	/**
 	 * If there's a copy of the body content which is guaranteed to have survived mangling in transit, use it.
 	 */
@@ -659,6 +673,15 @@ function encode_rel_links($links) {
 
 function item_store($arr,$force_parent = false) {
 
+	// If a Diaspora signature structure was passed in, pull it out of the 
+	// item array and set it aside for later storage.
+
+	$dsprsig = null;
+	if(x($arr,'dsprsig')) {
+		$dsprsig = json_decode(base64_decode($arr['dsprsig']));
+		unset($arr['dsprsig']);
+	}
+
 	if($arr['gravity'])
 		$arr['gravity'] = intval($arr['gravity']);
 	elseif($arr['parent-uri'] == $arr['uri'])
@@ -835,6 +858,16 @@ function item_store($arr,$force_parent = false) {
 		intval($current_post)
 	);
 
+	if($dsprsig) {
+		q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
+			intval($current_post),
+			dbesc($dsprsig->signed_text),
+			dbesc($dsprsig->signature),
+			dbesc($dsprsig->signer)
+		);
+	}
+
+
 	/**
 	 * If this is now the last-child, force all _other_ children of this parent to *not* be last-child
 	 */
@@ -1670,10 +1703,19 @@ function atom_entry($item,$type,$author,$owner,$comment = false) {
 		$o .= '<dfrn:private>1</dfrn:private>' . "\r\n";
 
 	if($item['extid'])
-		$o .= '<dfrn:extid>' . $item['extid'] . '</dfrn:extid>' . "\r\n";
+		$o .= '<dfrn:extid>' . xmlify($item['extid']) . '</dfrn:extid>' . "\r\n";
 
 	if($item['app'])
-		$o .= '<statusnet:notice_info local_id="' . $item['id'] . '" source="' . $item['app'] . '" ></statusnet:notice_info>';
+		$o .= '<statusnet:notice_info local_id="' . $item['id'] . '" source="' . xmlify($item['app']) . '" ></statusnet:notice_info>' . "\r\n";
+
+	if($item['guid'])
+		$o .= '<dfrn:diaspora_guid>' . $item['guid'] . '</dfrn:diaspora_guid>' . "\r\n";
+
+	if($item['signed_text']) {
+		$sign = base64_encode(json_encode(array('signed_text' => $item['signed_text'],'signature' => $item['signature'],'signer' => $item['signer'])));
+		$o .= '<dfrn:diaspora_signature>' . xmlify($sign) . '</dfrn:diaspora_signature>' . "\r\n";
+	}
+
 	$verb = construct_verb($item);
 	$o .= '<as:verb>' . xmlify($verb) . '</as:verb>' . "\r\n";
 	$actobj = construct_activity_object($item);

include/notifier.php

@@ -109,7 +109,8 @@ function notifier_run($argv, $argc){
 		$uid = $r[0]['uid'];
 		$updated = $r[0]['edited'];
 
-		$items = q("SELECT * FROM `item` WHERE `parent` = %d ORDER BY `id` ASC",
+		$items = q("SELECT `item`.*, `sign`.`signed_text`,`sign`.`signature`,`sign`.`signer` 
+			FROM `item` LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id` WHERE `parent` = %d ORDER BY `id` ASC",
 			intval($parent_id)
 		);
 

mod/item.php

@@ -15,6 +15,8 @@
  *
  */  
 
+require_once('include/crypto.php');
+
 function item_post(&$a) {
 
 	if((! local_user()) && (! remote_user()))
@@ -674,6 +676,27 @@ function item_post(&$a) {
 
 				pop_lang();
 			}
+
+			// We won't be able to sign Diaspora comments for authenticated visitors - we don't have their private key
+
+			if($self) {
+				require_once('include/bb2diaspora.php');
+				$signed_body = html_entity_decode(bb2diaspora($datarray['body']));
+				$myaddr = $a->user['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
+				if($datarray['verb'] === ACTIVITY_LIKE) 
+					$signed_text = $datarray['guid'] . ';' . 'Post' . ';' . $parent_item['guid'] . ';' . 'true' . ';' . $myaddr;
+				else
+			    	$signed_text = $datarray['guid'] . ';' . $parent_item['guid'] . ';' . $signed_body . ';' . $myaddr;
+
+				$authorsig = base64_encode(rsa_sign($signed_text,$a->user['prvkey'],'sha'));
+
+				q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
+					intval($post_id),
+            		dbesc($signed_text),
+            		dbesc(base64_encode($authorsig)),
+            		dbesc($myaddr)
+        		);
+			}
 		}
 		else {
 			$parent = $post_id;
@@ -799,6 +822,12 @@ function item_post(&$a) {
 		}
 	}
 
+
+
+
+
+
+
 	logger('post_complete');
 
 	// figure out how to return, depending on from whence we came