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https://github.com/ONLYOFFICE/core.git
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135 lines
4.3 KiB
C++
135 lines
4.3 KiB
C++
/*
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* (c) Copyright Ascensio System SIA 2010-2018
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*
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* This program is a free software product. You can redistribute it and/or
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* modify it under the terms of the GNU Affero General Public License (AGPL)
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* version 3 as published by the Free Software Foundation. In accordance with
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* Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
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* that Ascensio System SIA expressly excludes the warranty of non-infringement
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* of any third-party rights.
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*
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* This program is distributed WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For
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* details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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*
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* You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia,
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* EU, LV-1021.
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*
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* The interactive user interfaces in modified source and object code versions
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* of the Program must display Appropriate Legal Notices, as required under
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* Section 5 of the GNU AGPL version 3.
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*
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* Pursuant to Section 7(b) of the License you must retain the original Product
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* logo when distributing the program. Pursuant to Section 7(e) we decline to
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* grant you any rights under trademark law for use of our trademarks.
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*
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* All the Product's GUI elements, including illustrations and icon sets, as
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* well as technical writing content are licensed under the terms of the
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* Creative Commons Attribution-ShareAlike 4.0 International. See the License
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* terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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*
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*/
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#ifndef _PDF_READER_SECURITY_HANDLER_H
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#define _PDF_READER_SECURITY_HANDLER_H
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#include "Object.h"
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namespace PdfReader
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{
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class StringExt;
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class PDFDoc;
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//-------------------------------------------------------------------------------------------------------------------------------
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// SecurityHandler
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//-------------------------------------------------------------------------------------------------------------------------------
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class SecurityHandler
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{
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public:
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static SecurityHandler *Make(PDFDoc *pDocument, Object *pEncryptDict);
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SecurityHandler(PDFDoc *pDocument);
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virtual ~SecurityHandler();
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bool CheckEncryption(const std::wstring &ownerPassword, const std::wstring &userPassword);
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// Пытаемся авторизоваться.
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virtual bool Authorize(const std::wstring &ownerPassword, const std::wstring &userPassword) = 0;
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// Считываем различные параметры.
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virtual int GetPermissionFlags() = 0;
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virtual bool GetOwnerPasswordValid()= 0;
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virtual unsigned char *GetFileKey() = 0;
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virtual int GetFileKeyLength() = 0;
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virtual int GetEncodingVersion() = 0;
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virtual CryptAlgorithm GetEncodingAlgorithm() = 0;
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protected:
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PDFDoc *m_pDocument;
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};
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//-------------------------------------------------------------------------------------------------------------------------------
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// StandardSecurityHandler
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//-------------------------------------------------------------------------------------------------------------------------------
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class StandardSecurityHandler : public SecurityHandler
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{
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public:
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friend class Decrypt;
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StandardSecurityHandler(PDFDoc *pDocument, Object *pEncryptDict);
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virtual ~StandardSecurityHandler();
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virtual bool Authorize(const std::wstring &ownerPassword, const std::wstring &userPassword);
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virtual int GetPermissionFlags()
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{
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return m_nPermissionFlags;
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}
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virtual bool GetOwnerPasswordValid()
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{
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return m_bOwnerPasswordValid;
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}
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virtual unsigned char *GetFileKey()
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{
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return m_sFileKey;
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}
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virtual int GetFileKeyLength()
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{
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return m_nFileKeyLength;
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}
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virtual int GetEncodingVersion()
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{
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return m_nEncryptVersion;
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}
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virtual CryptAlgorithm GetEncodingAlgorithm()
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{
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return m_eCryptType;
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}
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private:
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bool m_bValid;
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int m_nPermissionFlags;
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bool m_bOwnerPasswordValid;
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unsigned char m_sFileKey[32];
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int m_nFileKeyLength;
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int m_nEncryptVersion;
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int m_nEncryptRevision;
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CryptAlgorithm m_eCryptType;
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bool m_bEncryptMetadata;
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StringExt *m_seOwnerKey;
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StringExt *m_seUserKey;
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StringExt *m_seFileID;
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StringExt *m_seOwnerEncryptionKey;
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StringExt *m_seUserEncryptionKey;
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StringExt *m_sePermsValue;
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};
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}
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#endif // _PDF_READER_SECURITY_HANDLER_H
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