code_allowed is a real mess. Start the cleanup by remving the account level code allow and limiting to specific channels only. This reduces the possibility of cross channel security issues coming into play. Then provide a single function for checking the code permission. This is only partially done as we often need to check against the observer or logged in channel as well as the resource owner to ensure that this only returns true for local channels which also own the requested resource.

3 files changed, 24 insertions, 53 deletions

diff --git a/include/channel.php b/include/channel.php
index 7cf78cb8b..f88a2f8aa 100644
--- a/include/channel.php
+++ b/include/channel.php
@@ -2247,3 +2247,20 @@ function channel_remove($channel_id, $local = true, $unset_session=false) {
 	}
 
 }
+
+/*
+ * This checks if a channel is allowed to publish executable code.
+ * It is up to the caller to determine if the observer or local_channel 
+ * is in fact the resource owner whose channel_id is being checked
+ */
+
+function channel_codeallowed($channel_id) {
+
+	if(! intval($channel_id))
+		return false;
+
+	$x = channelx_by_n($channel_id);
+	if(($x) && ($x['channel_pageflags'] & PAGE_ALLOWCODE))
+		return true;
+	return false;
+}
\ No newline at end of file
diff --git a/include/import.php b/include/import.php
index ac634639e..d0e15c89d 100644
--- a/include/import.php
+++ b/include/import.php
@@ -528,16 +528,8 @@ function sync_chatrooms($channel,$chatrooms) {
 function import_items($channel,$items,$sync = false,$relocate = null) {
 
 	if($channel && $items) {
-		$allow_code = false;
-		$r = q("select account_id, account_roles, channel_pageflags from account left join channel on channel_account_id = account_id 
-			where channel_id = %d limit 1",
-			intval($channel['channel_id'])
-		);
-		if($r) {
-			if(($r[0]['account_roles'] & ACCOUNT_ROLE_ALLOWCODE) || ($r[0]['channel_pageflags'] & PAGE_ALLOWCODE)) {
-				$allow_code = true;
-			}
-		}
+		
+		$allow_code = channel_codeallowed($channel['channel_id']);
 
 		$deliver = false;  // Don't deliver any messages or notifications when importing
 
@@ -1352,28 +1344,8 @@ function import_webpage_element($element, $channel, $type) {
 	}
 
 	// Verify ability to use html or php!!!
-	$execflag = false;
-	if($arr['mimetype'] === 'application/x-php' || $arr['mimetype'] === 'text/html') {
-		$z = q("select account_id, account_roles, channel_pageflags from account "
-			. "left join channel on channel_account_id = account_id where channel_id = %d limit 1", 
-			intval(local_channel())
-		);
 
-		if($z && (($z[0]['account_roles'] & ACCOUNT_ROLE_ALLOWCODE) || ($z[0]['channel_pageflags'] & PAGE_ALLOWCODE))) {
-			$execflag = true;
-		}
-		else {
-			logger('Unable to import element "' . $name .'" because AllowCode permission is denied.');
-			notice( t('Unable to import element "' . $name .'" because AllowCode permission is denied.') . EOL);
-			$element['import_success'] = 0;
-			return $element;
-		}
-	}
-		
-//	$z = q("select * from iconfig where v = '%s' and k = '%s' and cat = 'system' limit 1", 
-//		dbesc($name), 
-//		dbesc($namespace)
-//	);
+	$execflag = channel_codeallowed(local_channel());
 
 	$i = q("select id, edited, item_deleted from item where mid = '%s' and uid = %d limit 1", 
 		dbesc($arr['mid']), 
diff --git a/include/text.php b/include/text.php
index 911334a15..14ca19cef 100644
--- a/include/text.php
+++ b/include/text.php
@@ -104,15 +104,11 @@ function z_input_filter($channel_id,$s,$type = 'text/bbcode') {
 		return $s;
 	}
 
-	$r = q("select account_id, account_roles, channel_pageflags from account left join channel on channel_account_id = account_id where channel_id = %d limit 1",
+	$r = q("select channel_pageflags from channel where channel_id = %d limit 1",
 		intval($channel_id)
 	);
-	if($r) {
-		if(($r[0]['account_roles'] & ACCOUNT_ROLE_ALLOWCODE) || ($r[0]['channel_pageflags'] & PAGE_ALLOWCODE)) {
-			if(local_channel() && (get_account_id() == $r[0]['account_id'])) {
-				return $s;
-			}
-		}
+	if(($r) && (local_channel() == $channel_id) && ($r[0]['channel_pageflags'] & PAGE_ALLOWCODE)) {
+		return $s;
 	}
 
 	if($type === 'text/html')
@@ -1812,23 +1808,9 @@ function mimetype_select($channel_id, $current = 'text/bbcode') {
 	);
 
 
-	if(App::$is_sys) {
+	if((App::$is_sys) || (channel_codeallowed($channel_id) && $channel_id == local_channel())){
 		$x[] = 'application/x-php';
 	}
-	else {
-		$r = q("select account_id, account_roles, channel_pageflags from account left join channel on account_id = channel_account_id where
-			channel_id = %d limit 1",
-			intval($channel_id)
-		);
-
-		if($r) {
-			if(($r[0]['account_roles'] & ACCOUNT_ROLE_ALLOWCODE) || ($r[0]['channel_pageflags'] & PAGE_ALLOWCODE)) {
-				if(local_channel() && get_account_id() == $r[0]['account_id']) {
-					$x[] = 'application/x-php';
-				}
-			}
-		}
-	}
 
 	foreach($x as $y) {
 		$selected = (($y == $current) ? ' selected="selected" ' : '');