package/source/zipapi/blowfishcontext.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.
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   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  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <rtl/cipher.h>
  21 #include <rtl/ref.hxx>
  22
  23 #include "blowfishcontext.hxx"
  24
  25 using namespace ::com::sun::star;
  26
  27 // static
  28 uno::Reference< xml::crypto::XCipherContext > BlowfishCFB8CipherContext::Create( const uno::Sequence< sal_Int8 >& aDerivedKey, const uno::Sequence< sal_Int8 >& aInitVector, bool bEncrypt )
  29 {
  30     ::rtl::Reference< BlowfishCFB8CipherContext > xResult = new BlowfishCFB8CipherContext();
  31     xResult->m_pCipher = rtl_cipher_create( rtl_Cipher_AlgorithmBF, rtl_Cipher_ModeStream );
  32     if ( !xResult->m_pCipher )
  33         throw uno::RuntimeException("Can not create cipher!" );
  34
  35     if ( rtl_Cipher_E_None != rtl_cipher_init(
  36                                 xResult->m_pCipher,
  37                                 bEncrypt ? rtl_Cipher_DirectionEncode : rtl_Cipher_DirectionDecode,
  38                                 reinterpret_cast< const sal_uInt8* >( aDerivedKey.getConstArray() ),
  39                                 aDerivedKey.getLength(),
  40                                 reinterpret_cast< const sal_uInt8* >( aInitVector.getConstArray() ),
  41                                 aInitVector.getLength() ) )
  42     {
  43         throw uno::RuntimeException("Can not initialize cipher!" );
  44     }
  45
  46     xResult->m_bEncrypt = bEncrypt;
  47
  48     return uno::Reference< xml::crypto::XCipherContext >( xResult.get() );
  49 }
  50
  51 BlowfishCFB8CipherContext::~BlowfishCFB8CipherContext()
  52 {
  53     if ( m_pCipher )
  54     {
  55         rtl_cipher_destroy ( m_pCipher );
  56         m_pCipher = NULL;
  57     }
  58 }
  59
  60 uno::Sequence< sal_Int8 > SAL_CALL BlowfishCFB8CipherContext::convertWithCipherContext( const uno::Sequence< ::sal_Int8 >& aData )
  61     throw( lang::IllegalArgumentException, lang::DisposedException, uno::RuntimeException, std::exception )
  62 {
  63     ::osl::MutexGuard aGuard( m_aMutex );
  64     if ( !m_pCipher )
  65         throw lang::DisposedException();
  66
  67     uno::Sequence< sal_Int8 > aResult( aData.getLength() );
  68     rtlCipherError nError = rtl_Cipher_E_None;
  69
  70     if ( m_bEncrypt )
  71     {
  72         nError = rtl_cipher_encode( m_pCipher,
  73                           aData.getConstArray(),
  74                           aData.getLength(),
  75                           reinterpret_cast< sal_uInt8* >( aResult.getArray() ),
  76                           aResult.getLength() );
  77     }
  78     else
  79     {
  80         nError = rtl_cipher_decode( m_pCipher,
  81                           aData.getConstArray(),
  82                           aData.getLength(),
  83                           reinterpret_cast< sal_uInt8* >( aResult.getArray() ),
  84                           aResult.getLength() );
  85     }
  86
  87     if ( rtl_Cipher_E_None != nError )
  88     {
  89         throw uno::RuntimeException("Can not decrypt/encrypt with cipher!" );
  90     }
  91
  92     return aResult;
  93 }
  94
  95 uno::Sequence< ::sal_Int8 > SAL_CALL BlowfishCFB8CipherContext::finalizeCipherContextAndDispose()
  96     throw( lang::DisposedException, uno::RuntimeException, std::exception )
  97 {
  98     ::osl::MutexGuard aGuard( m_aMutex );
  99     if ( !m_pCipher )
 100         throw lang::DisposedException();
 101
 102     rtl_cipher_destroy ( m_pCipher );
 103     m_pCipher = NULL;
 104
 105     return uno::Sequence< sal_Int8 >();
 106 }
 107
 108 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */