/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* * This file is part of the LibreOffice project. * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. * * This file incorporates work covered by the following license notice: * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed * with this work for additional information regarding copyright * ownership. The ASF licenses this file to you under the Apache * License, Version 2.0 (the "License"); you may not use this file * except in compliance with the License. You may obtain a copy of * the License at http://www.apache.org/licenses/LICENSE-2.0 . */ #ifndef INCLUDED_COMPHELPER_DOCPASSWORDHELPER_HXX #define INCLUDED_COMPHELPER_DOCPASSWORDHELPER_HXX #include #include #include #include namespace com { namespace sun { namespace star { namespace task { class XInteractionHandler; } } } } namespace com { namespace sun { namespace star { namespace beans { struct PropertyValue; } } } } namespace comphelper { enum DocPasswordVerifierResult { DocPasswordVerifierResult_OK, DocPasswordVerifierResult_WRONG_PASSWORD, DocPasswordVerifierResult_ABORT }; /** Base class for a password verifier used by the DocPasswordHelper class below. Users have to implement the virtual functions and pass an instance of the verifier to one of the password request functions. */ class COMPHELPER_DLLPUBLIC IDocPasswordVerifier { public: virtual ~IDocPasswordVerifier(); /** Will be called every time a password needs to be verified. @param rPassword The password to be verified @param o_rEncryptionData Output parameter, that is filled with the EncryptionData generated from the password. The data is filled only if the validation was successful. @return The result of the verification. - DocPasswordVerifierResult_OK, if and only if the passed password is valid and can be used to process the related document. - DocPasswordVerifierResult_WRONG_PASSWORD, if the password is wrong. The user may be asked again for a new password. - DocPasswordVerifierResult_ABORT, if an unrecoverable error occurred while password verification. The password request loop will be aborted. */ virtual DocPasswordVerifierResult verifyPassword( const OUString& rPassword, css::uno::Sequence< css::beans::NamedValue >& o_rEncryptionData ) = 0; /** Will be called every time an encryption data needs to be verified. @param rEncryptionData The data will be validated @return The result of the verification. - DocPasswordVerifierResult_OK, if and only if the passed encryption data is valid and can be used to process the related document. - DocPasswordVerifierResult_WRONG_PASSWORD, if the encryption data is wrong. - DocPasswordVerifierResult_ABORT, if an unrecoverable error occurred while data verification. The password request loop will be aborted. */ virtual DocPasswordVerifierResult verifyEncryptionData( const css::uno::Sequence< css::beans::NamedValue >& o_rEncryptionData ) = 0; }; /** Helper that asks for a document password and checks its validity. */ class COMPHELPER_DLLPUBLIC DocPasswordHelper { public: /** This helper function generates the information related to "Password to modify" provided by user. The result sequence contains the hash and the algorithm-related info. @param aString The string for which the info should be generated @return The sequence containing the hash and the algorithm-related info */ static css::uno::Sequence< css::beans::PropertyValue > GenerateNewModifyPasswordInfo( const OUString& aPassword ); /** This helper function allows to check whether the "Password to modify" provided by user is the correct one. @param aString The string containing the provided password @param aInfo The sequence containing the hash and the algorithm-info @return if the password is correct one otherwise */ static bool IsModifyPasswordCorrect( const OUString& aPassword, const css::uno::Sequence< css::beans::PropertyValue >& aInfo ); /** This helper function generates the hash code based on the algorithm specified by MS for "Password to modify" feature of Word. @param aString The string for which the hash should be calculated @return The hash represented by sal_uInt32 */ static sal_uInt32 GetWordHashAsUINT32( const OUString& aString ); /** This helper function generates the hash code based on the algorithm specified by MS for "Password to modify" and passwords related to table protection of Excel. @param aString The string for which the hash should be calculated @param nEnc The encoding that should be used to generate the 8-bit string before the hash is generated @return The hash represented by sal_uInt16 */ static sal_uInt16 GetXLHashAsUINT16( const OUString& aString, rtl_TextEncoding nEnc = RTL_TEXTENCODING_UTF8 ); /** This helper function generates the hash code based on the algorithm specified by MS for "Password to modify" and passwords related to table protection. @param aString The string for which the hash should be calculated @param nEnc The encoding that should be used to generate the 8-bit string before the hash is generated @return The hash represented by sequence of bytes in BigEndian form */ static css::uno::Sequence< sal_Int8 > GetXLHashAsSequence( const OUString& aString, rtl_TextEncoding nEnc = RTL_TEXTENCODING_UTF8 ); /** This helper function generates a random sequence of bytes of requested length. */ static css::uno::Sequence< sal_Int8 > GenerateRandomByteSequence( sal_Int32 nLength ); /** This helper function generates a byte sequence representing the key digest value used by MSCodec_Std97 codec. */ static css::uno::Sequence< sal_Int8 > GenerateStd97Key( const OUString& aPassword, const css::uno::Sequence< sal_Int8 >& aDocId ); /** This helper function generates a byte sequence representing the key digest value used by MSCodec_Std97 codec. */ static css::uno::Sequence< sal_Int8 > GenerateStd97Key( const sal_uInt16 pPassData[16], const css::uno::Sequence< sal_Int8 >& aDocId ); /** This helper function generates a byte sequence representing the key digest value used by MSCodec_Std97 codec. */ static css::uno::Sequence< sal_Int8 > GenerateStd97Key( const sal_uInt16 pPassData[16], const sal_uInt8 pDocId[16] ); /** This helper function tries to request and verify a password to load a protected document. First, the list of default passwords will be tried if provided. This is needed by import filters for external file formats that have to check a predefined password in some cases without asking the user for a password. Every password is checked using the passed password verifier. If not successful, the passed password of a medium is tried, that has been set e.g. by an API call to load a document. If existing, the password is checked using the passed password verifier. If still not successful, the passed interaction handler is used to request a password from the user. This will be repeated until the passed password verifier validates the entered password, or if the user chooses to cancel password input. @param rVerifier The password verifier used to check every processed password. @param rMediaPassword If not empty, will be passed to the password validator before requesting a password from the user. This password usually should be querried from a media descriptor. @param rxInteractHandler The interaction handler that will be used to request a password from the user, e.g. by showing a password input dialog. @param rDocumentUrl The URL of the related document that will be shown in the password input dialog. @param eRequestType The password request type that will be passed to the DocPasswordRequest object created internally. See docpasswordrequest.hxx for more details. @param pDefaultPasswords If not null, contains default passwords that will be tried before a password will be requested from the media descriptor or the user. @param pbIsDefaultPassword (output parameter) If not null, the type of the found password will be returned. True means the password has been found in the passed list of default passwords. False means the password has been taken from the rMediaPassword parameter or has been entered by the user. @return If not empty, contains the password that has been validated by the passed password verifier. If empty, no valid password has been found, or the user has chossen to cancel password input. */ static css::uno::Sequence< css::beans::NamedValue > requestAndVerifyDocPassword( IDocPasswordVerifier& rVerifier, const css::uno::Sequence< css::beans::NamedValue >& rMediaEncData, const OUString& rMediaPassword, const css::uno::Reference< css::task::XInteractionHandler >& rxInteractHandler, const OUString& rDocumentUrl, DocPasswordRequestType eRequestType, const ::std::vector< OUString >* pDefaultPasswords = nullptr, bool* pbIsDefaultPassword = nullptr ); private: ~DocPasswordHelper(); }; } // namespace comphelper #endif /* vim:set shiftwidth=4 softtabstop=4 expandtab: */