package/source/zipapi/blowfishcontext.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
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   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 <sal/config.h>
  21
  22 #include <com/sun/star/lang/DisposedException.hpp>
  23 #include <rtl/cipher.h>
  24 #include <rtl/ref.hxx>
  25
  26 #include "blowfishcontext.hxx"
  27
  28 using namespace ::com::sun::star;
  29
  30 // static
  31 uno::Reference< xml::crypto::XCipherContext > BlowfishCFB8CipherContext::Create( const uno::Sequence< sal_Int8 >& aDerivedKey, const uno::Sequence< sal_Int8 >& aInitVector, bool bEncrypt )
  32 {
  33     ::rtl::Reference< BlowfishCFB8CipherContext > xResult = new BlowfishCFB8CipherContext();
  34     xResult->m_pCipher = rtl_cipher_create( rtl_Cipher_AlgorithmBF, rtl_Cipher_ModeStream );
  35     if ( !xResult->m_pCipher )
  36         throw uno::RuntimeException(u"Can not create cipher!"_ustr );
  37
  38     if ( rtl_Cipher_E_None != rtl_cipher_init(
  39                                 xResult->m_pCipher,
  40                                 bEncrypt ? rtl_Cipher_DirectionEncode : rtl_Cipher_DirectionDecode,
  41                                 reinterpret_cast< const sal_uInt8* >( aDerivedKey.getConstArray() ),
  42                                 aDerivedKey.getLength(),
  43                                 reinterpret_cast< const sal_uInt8* >( aInitVector.getConstArray() ),
  44                                 aInitVector.getLength() ) )
  45     {
  46         throw uno::RuntimeException(u"Can not initialize cipher!"_ustr );
  47     }
  48
  49     xResult->m_bEncrypt = bEncrypt;
  50
  51     return xResult;
  52 }
  53
  54 BlowfishCFB8CipherContext::~BlowfishCFB8CipherContext()
  55 {
  56     if ( m_pCipher )
  57     {
  58         rtl_cipher_destroy ( m_pCipher );
  59         m_pCipher = nullptr;
  60     }
  61 }
  62
  63 uno::Sequence< sal_Int8 > SAL_CALL BlowfishCFB8CipherContext::convertWithCipherContext( const uno::Sequence< ::sal_Int8 >& aData )
  64 {
  65     std::scoped_lock aGuard( m_aMutex );
  66     if ( !m_pCipher )
  67         throw lang::DisposedException();
  68
  69     uno::Sequence< sal_Int8 > aResult( aData.getLength() );
  70     rtlCipherError nError = rtl_Cipher_E_None;
  71
  72     if ( m_bEncrypt )
  73     {
  74         nError = rtl_cipher_encode( m_pCipher,
  75                           aData.getConstArray(),
  76                           aData.getLength(),
  77                           reinterpret_cast< sal_uInt8* >( aResult.getArray() ),
  78                           aResult.getLength() );
  79     }
  80     else
  81     {
  82         nError = rtl_cipher_decode( m_pCipher,
  83                           aData.getConstArray(),
  84                           aData.getLength(),
  85                           reinterpret_cast< sal_uInt8* >( aResult.getArray() ),
  86                           aResult.getLength() );
  87     }
  88
  89     if ( rtl_Cipher_E_None != nError )
  90     {
  91         throw uno::RuntimeException(u"Can not decrypt/encrypt with cipher!"_ustr );
  92     }
  93
  94     return aResult;
  95 }
  96
  97 uno::Sequence< ::sal_Int8 > SAL_CALL BlowfishCFB8CipherContext::finalizeCipherContextAndDispose()
  98 {
  99     std::scoped_lock aGuard( m_aMutex );
 100     if ( !m_pCipher )
 101         throw lang::DisposedException();
 102
 103     rtl_cipher_destroy ( m_pCipher );
 104     m_pCipher = nullptr;
 105
 106     return uno::Sequence< sal_Int8 >();
 107 }
 108
 109 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */