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    00001 /*
    00002  * Copyright 2003,2004 The Apache Software Foundation.
    00003  *
    00004  * Licensed under the Apache License, Version 2.0 (the "License");
    00005  * you may not use this file except in compliance with the License.
    00006  * You may obtain a copy of the License at
    00007  *
    00008  *      http://www.apache.org/licenses/LICENSE-2.0
    00009  *
    00010  * Unless required by applicable law or agreed to in writing, software
    00011  * distributed under the License is distributed on an "AS IS" BASIS,
    00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    00013  * See the License for the specific language governing permissions and
    00014  * limitations under the License.
    00015  */
    00016
    00017 /*
    00018  * $Log: SecurityManager.hpp,v $
    00019  * Revision 1.4  2004/09/08 13:56:23  peiyongz
    00020  * Apache License Version 2.0
    00021  *
    00022  * Revision 1.3  2004/01/29 11:48:46  cargilld
    00023  * Code cleanup changes to get rid of various compiler diagnostic messages.
    00024  *
    00025  * Revision 1.2  2003/04/22 12:53:38  neilg
    00026  * change const static member to an enum to make MSVC happy
    00027  *
    00028  * change ENTITY_EXPANSION_LIMIT from a static const data member to an enum
    00029  *
    00030  * Revision 1.1  2003/04/17 21:58:49  neilg
    00031  * Adding a new property,
    00032  * http://apache.org/xml/properties/security-manager, with
    00033  * appropriate getSecurityManager/setSecurityManager methods on DOM
    00034  * and SAX parsers.  Also adding a new SecurityManager class.
    00035  *
    00036  * The purpose of these modifications is to permit applications a
    00037  * means to have the parser reject documents whose processing would
    00038  * otherwise consume large amounts of system resources.  Malicious
    00039  * use of such documents could be used to launch a denial-of-service
    00040  * attack against a system running the parser.  Initially, the
    00041  * SecurityManager only knows about attacks that can result from
    00042  * exponential entity expansion; this is the only known attack that
    00043  * involves processing a single XML document.  Other, simlar attacks
    00044  * can be launched if arbitrary schemas may be parsed; there already
    00045  * exist means (via use of the EntityResolver interface) by which
    00046  * applications can deny processing of untrusted schemas.  In future,
    00047  * the SecurityManager will be expanded to take these other exploits
    00048  * into account.
    00049  *
    00050  * Initial checkin of SecurityManager
    00051  *
    00052  * $Id: SecurityManager.hpp,v 1.4 2004/09/08 13:56:23 peiyongz Exp $
    00053  *
    00054  */
    00055
    00056 #ifndef SECURITYMANAGER_HPP
    00057 #define SECURITYMANAGER_HPP
    00058
    00059 #include <xercesc/util/XercesDefs.hpp>
    00060
    00061 XERCES_CPP_NAMESPACE_BEGIN
    00062
    00085 class  SecurityManager
    00086 {
    00087 public:
    00088
    00089     enum { ENTITY_EXPANSION_LIMIT = 50000};
    00090
    00094     SecurityManager()
    00095         : fEntityExpansionLimit(ENTITY_EXPANSION_LIMIT)
    00096     {
    00097     }
    00098
    00100     virtual ~SecurityManager(){};
    00102
    00117     virtual void setEntityExpansionLimit(unsigned int newLimit)
    00118     {
    00119         fEntityExpansionLimit = newLimit;
    00120     }
    00121
    00129     virtual unsigned int getEntityExpansionLimit() const
    00130     {
    00131         return fEntityExpansionLimit;
    00132     }
    00134
    00135 protected:
    00136     unsigned int fEntityExpansionLimit;
    00137
    00138 private:
    00139
    00140     /* Unimplemented Constructors and operators */
    00141     /* Copy constructor */
    00142     SecurityManager(const SecurityManager&);
    00143
    00145     SecurityManager& operator=(const SecurityManager&);
    00146 };
    00147
    00148 XERCES_CPP_NAMESPACE_END
    00149
    00150 #endif

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