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/* -*- 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 <com/sun/star/beans/NamedValue.hpp>
#include <comphelper/comphelperdllapi.h>
#include <vector>
#include <comphelper/docpasswordrequest.hxx>
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 everytime 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, ::com::sun::star::uno::Sequence< ::com::sun::star::beans::NamedValue >& o_rEncryptionData ) = 0;
/** Will be called everytime 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
occured while data verification. The password request loop
will be aborted.
*/
virtual DocPasswordVerifierResult verifyEncryptionData( const ::com::sun::star::uno::Sequence< ::com::sun::star::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 ::com::sun::star::uno::Sequence< ::com::sun::star::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
<TRUE/> if the password is correct one
<FALSE/> otherwise
*/
static sal_Bool IsModifyPasswordCorrect(
const OUString& aPassword,
const ::com::sun::star::uno::Sequence< ::com::sun::star::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 ::com::sun::star::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 ::com::sun::star::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 ::com::sun::star::uno::Sequence< sal_Int8 > GenerateStd97Key(
const OUString& aPassword,
const ::com::sun::star::uno::Sequence< sal_Int8 >& aDocId );
// ------------------------------------------------------------------------
/** This helper function generates a byte sequence representing the
key digest value used by MSCodec_Std97 codec.
*/
static ::com::sun::star::uno::Sequence< sal_Int8 > GenerateStd97Key(
const sal_uInt16 pPassData[16],
const ::com::sun::star::uno::Sequence< sal_Int8 >& aDocId );
// ------------------------------------------------------------------------
/** 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 rDocumentName
The name 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 ::com::sun::star::uno::Sequence< ::com::sun::star::beans::NamedValue > requestAndVerifyDocPassword(
IDocPasswordVerifier& rVerifier,
const ::com::sun::star::uno::Sequence< ::com::sun::star::beans::NamedValue >& rMediaEncData,
const OUString& rMediaPassword,
const ::com::sun::star::uno::Reference<
::com::sun::star::task::XInteractionHandler >& rxInteractHandler,
const OUString& rDocumentName,
DocPasswordRequestType eRequestType,
const ::std::vector< OUString >* pDefaultPasswords = 0,
bool* pbIsDefaultPassword = 0 );
private:
~DocPasswordHelper();
};
// ============================================================================
} // namespace comphelper
#endif
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