oox/source/crypto/DocumentEncryption.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  */
  10
  11 #include "oox/crypto/DocumentEncryption.hxx"
  12
  13 #include <com/sun/star/io/XSeekable.hpp>
  14
  15 #include "oox/helper/binaryinputstream.hxx"
  16 #include "oox/helper/binaryoutputstream.hxx"
  17
  18 namespace oox {
  19 namespace core {
  20
  21 using namespace css::beans;
  22 using namespace css::io;
  23 using namespace css::lang;
  24 using namespace css::uno;
  25
  26 using namespace std;
  27
  28 DocumentEncryption::DocumentEncryption(Reference< XStream > xDocumentStream, oox::ole::OleStorage& rOleStorage, OUString aPassword) :
  29     mxDocumentStream(xDocumentStream),
  30     mrOleStorage(rOleStorage),
  31     maPassword(aPassword)
  32 {}
  33
  34 bool DocumentEncryption::encrypt()
  35 {
  36     Reference< XInputStream > xInputStream ( mxDocumentStream->getInputStream(), UNO_SET_THROW );
  37     Reference< XSeekable > xSeekable( xInputStream, UNO_QUERY );
  38
  39     if (!xSeekable.is())
  40         return false;
  41
  42     sal_uInt32 aLength = xSeekable->getLength();
  43
  44     if (!mrOleStorage.isStorage())
  45         return false;
  46
  47     Reference< XOutputStream > xEncryptionInfo( mrOleStorage.openOutputStream( "EncryptionInfo" ), UNO_SET_THROW );
  48     BinaryXOutputStream aEncryptionInfoBinaryOutputStream( xEncryptionInfo, false );
  49
  50     mEngine.writeEncryptionInfo(maPassword, aEncryptionInfoBinaryOutputStream);
  51
  52     aEncryptionInfoBinaryOutputStream.close();
  53     xEncryptionInfo->flush();
  54     xEncryptionInfo->closeOutput();
  55
  56     Reference< XOutputStream > xEncryptedPackage( mrOleStorage.openOutputStream( "EncryptedPackage" ), UNO_SET_THROW );
  57     BinaryXOutputStream aEncryptedPackageStream( xEncryptedPackage, false );
  58
  59     BinaryXInputStream aDocumentInputStream( xInputStream, false );
  60     aDocumentInputStream.seekToStart();
  61
  62     aEncryptedPackageStream.writeValue<sal_uInt32>( aLength ); // size
  63     aEncryptedPackageStream.writeValue<sal_uInt32>( 0 );       // reserved
  64
  65     mEngine.encrypt(aDocumentInputStream, aEncryptedPackageStream);
  66
  67     aEncryptedPackageStream.close();
  68     aDocumentInputStream.close();
  69
  70     xEncryptedPackage->flush();
  71     xEncryptedPackage->closeOutput();
  72
  73     return true;
  74 }
  75
  76 } // namespace core
  77 } // namespace oox
  78
  79 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */