001/** 002 * 003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved. 004 * 005 * This library is free software; you can redistribute it and/or 006 * modify it under the terms of the GNU Lesser General Public 007 * License as published by the Free Software Foundation; either 008 * version 2.1 of the License, or (at your option) any later version. 009 * 010 * This library is distributed in the hope that it will be useful, 011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 013 * Lesser General Public License for more details. 014 * 015 * You should have received a copy of the GNU Lesser General Public 016 * License along with this library. If not, see <http://www.gnu.org/licenses/>. 017 * 018 **/ 019package lucee.runtime.functions.csrf; 020 021import lucee.runtime.PageContext; 022import lucee.runtime.exp.ExpressionException; 023import lucee.runtime.exp.PageException; 024import lucee.runtime.ext.function.Function; 025import lucee.runtime.type.scope.Session; 026import lucee.runtime.type.scope.storage.StorageScope; 027 028public class CSRFGenerateToken implements Function { 029 030 private static final long serialVersionUID = -2411153524245619987L; 031 032 public static String call(PageContext pc) throws PageException { 033 return call(pc, null, false); 034 } 035 public static String call(PageContext pc, String key) throws PageException { 036 return call(pc, key, false); 037 } 038 039 public static String call(PageContext pc, String key, boolean forceNew) throws PageException { 040 if(key==null) key=""; 041 042 return getStorageScope(pc).generateToken(key, forceNew); 043 } 044 public static StorageScope getStorageScope(PageContext pc) throws PageException { 045 Session session = pc.sessionScope(); 046 if(!(session instanceof StorageScope)) 047 throw new ExpressionException("this function only works with CF Sessions"); 048 return (StorageScope) session; 049 } 050}