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fixed bug allowing a peer to alter the flags of lobby items so that they can get displayed in the broadcast channel. Now the checkMessageSecurity() method also checks flags consistency (et toc!)
git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@6621 b45a01b8-16f6-495d-af2f-9b41ad6348cc
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@ -163,7 +163,7 @@ int p3ChatService::sendPublicChat(const std::wstring &msg)
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RsChatMsgItem *ci = new RsChatMsgItem();
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ci->PeerId(*it);
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ci->chatFlags = 0;
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ci->chatFlags = RS_CHAT_FLAG_PUBLIC;
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ci->sendTime = time(NULL);
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ci->recvTime = ci->sendTime;
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ci->message = msg;
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@ -1102,6 +1102,29 @@ bool p3ChatService::checkForMessageSecurity(RsChatMsgItem *ci)
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// <span> <img src="data:image/png;base64,... />
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// <a href="retroshare://…>…</a>
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// Also check flags. Lobby msgs should have proper flags, but they can be
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// corrupted by a friend before sending them that can result in e.g. lobby
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// messages ending up in the broadcast channel, etc.
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uint32_t fl = ci->chatFlags & (RS_CHAT_FLAG_PRIVATE | RS_CHAT_FLAG_PUBLIC | RS_CHAT_FLAG_LOBBY) ;
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std::cerr << "Checking msg flags: " << std::hex << fl << std::endl;
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if(dynamic_cast<RsChatLobbyMsgItem*>(ci) != NULL)
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{
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if(fl != (RS_CHAT_FLAG_PRIVATE | RS_CHAT_FLAG_LOBBY))
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std::cerr << "Warning: received chat lobby message with iconsistent flags " << std::hex << fl << std::dec << " from friend peer " << ci->PeerId() << std::endl;
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ci->chatFlags &= ~RS_CHAT_FLAG_PUBLIC ;
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}
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else if(fl!=0 && !(fl == RS_CHAT_FLAG_PRIVATE || fl == RS_CHAT_FLAG_PUBLIC)) // The !=0 is normally not needed, but we keep it for
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{ // a while, for backward compatibility. It's not harmful.
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std::cerr << "Warning: received chat lobby message with iconsistent flags " << std::hex << fl << std::dec << " from friend peer " << ci->PeerId() << std::endl;
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std::cerr << "This message will be dropped."<< std::endl;
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return false ;
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}
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return true ;
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}
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@ -1162,7 +1185,8 @@ bool p3ChatService::handleRecvChatMsgItem(RsChatMsgItem *ci)
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if(!locked_checkAndRebuildPartialMessage_deprecated(ci)) // Don't delete ! This function is not handled propoerly for chat lobby msgs, so
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return true ; // we don't use it in this case.
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checkForMessageSecurity(ci) ;
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if(!checkForMessageSecurity(ci))
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return false ;
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}
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#ifdef CHAT_DEBUG
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