Character delete patch

Removed an exploit where characters of different accounts could be deleted by a logging account session. Issue pointed out by zera.

scripts/npc/1300001.js

@@ -17,10 +17,6 @@
     You should have received a copy of the GNU Affero General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
-/* NPC Base
-	Map Name (Map ID)
-	Extra NPC info.
- */
 
 var status;
  

scripts/npc/1300006.js

@@ -17,10 +17,6 @@
     You should have received a copy of the GNU Affero General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
-/* NPC Base
-	Map Name (Map ID)
-	Extra NPC info.
- */
 
 var status;
  

scripts/npc/1300012.js

@@ -17,10 +17,6 @@
     You should have received a copy of the GNU Affero General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
-/* NPC Base
-	Map Name (Map ID)
-	Extra NPC info.
- */
 
 var status;
  

scripts/npc/1300013.js

@@ -2,7 +2,6 @@
 	NPC: Blocked Entrance (portal?)
 	MAP: Mushroom Castle - East Castle Tower (106021400)
 */
-importPackage(Packages.tools);
 
 var status;
 

src/client/MapleClient.java

@@ -965,8 +965,37 @@ public class MapleClient {
 		return Server.getInstance().getChannel(world, channel);
 	}
 
+        private boolean hasCharacter(int cid) throws SQLException {
+                Connection con = null;
+                PreparedStatement ps = null;
+                ResultSet rs = null;
+                
+                try {
+                        con = DatabaseConnection.getConnection();
+                        ps = con.prepareStatement("SELECT id FROM characters WHERE accountid = ?");
+                        ps.setInt(1, getAccID());
+                        
+                        rs = ps.executeQuery();
+                        while (rs.next()) {
+                                if (rs.getInt("id") == cid) {
+                                        return true;
+                                }
+                        }
+                } finally {
+                        if(rs != null && !rs.isClosed()) rs.close();
+                        if(ps != null && !ps.isClosed()) ps.close();
+                        if(con != null && !con.isClosed()) con.close();
+                }
+                
+                return false;
+        }
+        
 	public boolean deleteCharacter(int cid) {
                 try {
+                        if(!hasCharacter(cid)) {
+                                return false;
+                        }
+                    
                         return MapleCharacter.deleteCharFromDB(MapleCharacter.loadCharFromDB(cid, this, false));
                 } catch(SQLException ex) {
                         ex.printStackTrace();

src/net/server/handlers/login/DeleteCharHandler.java

@@ -34,9 +34,12 @@ public final class DeleteCharHandler extends AbstractMaplePacketHandler {
         String pic = slea.readMapleAsciiString();
         int cid = slea.readInt();
         if (c.checkPic(pic)) {
-            FilePrinter.printError(FilePrinter.DELETED_CHARACTERS + c.getAccountName() + ".txt", c.getAccountName() + " deleted CID: " + cid + "\r\n");			
-            c.announce(MaplePacketCreator.deleteCharResponse(cid, 0));
-            c.deleteCharacter(cid);
+            if(c.deleteCharacter(cid)) {
+                FilePrinter.printError(FilePrinter.DELETED_CHARACTERS + c.getAccountName() + ".txt", c.getAccountName() + " deleted CID: " + cid + "\r\n");			
+                c.announce(MaplePacketCreator.deleteCharResponse(cid, 0));
+            } else {
+                c.announce(MaplePacketCreator.deleteCharResponse(cid, 0x14));
+            }
         } else {
             c.announce(MaplePacketCreator.deleteCharResponse(cid, 0x14));
         }