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.
   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  * 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
  21 #include <rtl/cipher.h>
  22 #include <rtl/ref.hxx>
  23
  24 #include "blowfishcontext.hxx"
  25
  26 using namespace ::com::sun::star;
  27
  28 // static
  29 uno::Reference< xml::crypto::XCipherContext > BlowfishCFB8CipherContext::Create( const uno::Sequence< sal_Int8 >& aDerivedKey, const uno::Sequence< sal_Int8 >& aInitVector, bool bEncrypt )
  30 {
  31     ::rtl::Reference< BlowfishCFB8CipherContext > xResult = new BlowfishCFB8CipherContext();
  32     xResult->m_pCipher = rtl_cipher_create( rtl_Cipher_AlgorithmBF, rtl_Cipher_ModeStream );
  33     if ( !xResult->m_pCipher )
  34         throw uno::RuntimeException("Can not create cipher!",
  35                                      uno::Reference< XInterface >() );
  36
  37     if ( rtl_Cipher_E_None != rtl_cipher_init(
  38                                 xResult->m_pCipher,
  39                                 bEncrypt ? rtl_Cipher_DirectionEncode : rtl_Cipher_DirectionDecode,
  40                                 reinterpret_cast< const sal_uInt8* >( aDerivedKey.getConstArray() ),
  41                                 aDerivedKey.getLength(),
  42                                 reinterpret_cast< const sal_uInt8* >( aInitVector.getConstArray() ),
  43                                 aInitVector.getLength() ) )
  44     {
  45         throw uno::RuntimeException("Can not initialize cipher!",
  46                                      uno::Reference< XInterface >() );
  47     }
  48
  49     xResult->m_bEncrypt = bEncrypt;
  50
  51     return uno::Reference< xml::crypto::XCipherContext >( xResult.get() );
  52 }
  53
  54 BlowfishCFB8CipherContext::~BlowfishCFB8CipherContext()
  55 {
  56     if ( m_pCipher )
  57     {
  58         rtl_cipher_destroy ( m_pCipher );
  59         m_pCipher = NULL;
  60     }
  61 }
  62
  63 uno::Sequence< sal_Int8 > SAL_CALL BlowfishCFB8CipherContext::convertWithCipherContext( const uno::Sequence< ::sal_Int8 >& aData )
  64     throw( lang::IllegalArgumentException, lang::DisposedException, uno::RuntimeException )
  65 {
  66     ::osl::MutexGuard aGuard( m_aMutex );
  67     if ( !m_pCipher )
  68         throw lang::DisposedException();
  69
  70     uno::Sequence< sal_Int8 > aResult( aData.getLength() );
  71     rtlCipherError nError = rtl_Cipher_E_None;
  72
  73     if ( m_bEncrypt )
  74     {
  75         nError = rtl_cipher_encode( m_pCipher,
  76                           aData.getConstArray(),
  77                           aData.getLength(),
  78                           reinterpret_cast< sal_uInt8* >( aResult.getArray() ),
  79                           aResult.getLength() );
  80     }
  81     else
  82     {
  83         nError = rtl_cipher_decode( m_pCipher,
  84                           aData.getConstArray(),
  85                           aData.getLength(),
  86                           reinterpret_cast< sal_uInt8* >( aResult.getArray() ),
  87                           aResult.getLength() );
  88     }
  89
  90     if ( rtl_Cipher_E_None != nError )
  91     {
  92         throw uno::RuntimeException("Can not decrypt/encrypt with cipher!",
  93                                      uno::Reference< uno::XInterface >() );
  94     }
  95
  96     return aResult;
  97 }
  98
  99 uno::Sequence< ::sal_Int8 > SAL_CALL BlowfishCFB8CipherContext::finalizeCipherContextAndDispose()
 100     throw( lang::DisposedException, uno::RuntimeException )
 101 {
 102     ::osl::MutexGuard aGuard( m_aMutex );
 103     if ( !m_pCipher )
 104         throw lang::DisposedException();
 105
 106     rtl_cipher_destroy ( m_pCipher );
 107     m_pCipher = NULL;
 108
 109     return uno::Sequence< sal_Int8 >();
 110 }
 111
 112
 113 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */