blowfishcontext.cxx

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#include <sal/config.h>
 
#include <com/sun/star/lang/DisposedException.hpp>
#include <rtl/cipher.h>
#include <rtl/ref.hxx>
 
#include "blowfishcontext.hxx"
 
using namespace ::com::sun::star;
 
// static
uno::Reference< xml::crypto::XCipherContext > BlowfishCFB8CipherContext::Create( const uno::Sequence< sal_Int8 >& aDerivedKey, const uno::Sequence< sal_Int8 >& aInitVector, bool bEncrypt )
{
    ::rtl::Reference< BlowfishCFB8CipherContext > xResult = new BlowfishCFB8CipherContext();
    xResult->m_pCipher = rtl_cipher_create( rtl_Cipher_AlgorithmBF, rtl_Cipher_ModeStream );
    if ( !xResult->m_pCipher )
        throw uno::RuntimeException("Can not create cipher!" );
 
    if ( rtl_Cipher_E_None != rtl_cipher_init(
                                xResult->m_pCipher,
                                bEncrypt ? rtl_Cipher_DirectionEncode : rtl_Cipher_DirectionDecode,
                                reinterpret_cast< const sal_uInt8* >( aDerivedKey.getConstArray() ),
                                aDerivedKey.getLength(),
                                reinterpret_cast< const sal_uInt8* >( aInitVector.getConstArray() ),
                                aInitVector.getLength() ) )
    {
        throw uno::RuntimeException("Can not initialize cipher!" );
    }
 
    xResult->m_bEncrypt = bEncrypt;
 
    return xResult;
}
 
BlowfishCFB8CipherContext::~BlowfishCFB8CipherContext()
{
    if ( m_pCipher )
    {
        rtl_cipher_destroy ( m_pCipher );
        m_pCipher = nullptr;
    }
}
 
uno::Sequence< sal_Int8 > SAL_CALL BlowfishCFB8CipherContext::convertWithCipherContext( const uno::Sequence< ::sal_Int8 >& aData )
{
    std::scoped_lock aGuard( m_aMutex );
    if ( !m_pCipher )
        throw lang::DisposedException();
 
    uno::Sequence< sal_Int8 > aResult( aData.getLength() );
    rtlCipherError nError = rtl_Cipher_E_None;
 
    if ( m_bEncrypt )
    {
        nError = rtl_cipher_encode( m_pCipher,
                          aData.getConstArray(),
                          aData.getLength(),
                          reinterpret_cast< sal_uInt8* >( aResult.getArray() ),
                          aResult.getLength() );
    }
    else
    {
        nError = rtl_cipher_decode( m_pCipher,
                          aData.getConstArray(),
                          aData.getLength(),
                          reinterpret_cast< sal_uInt8* >( aResult.getArray() ),
                          aResult.getLength() );
    }
 
    if ( rtl_Cipher_E_None != nError )
    {
        throw uno::RuntimeException("Can not decrypt/encrypt with cipher!" );
    }
 
    return aResult;
}
 
uno::Sequence< ::sal_Int8 > SAL_CALL BlowfishCFB8CipherContext::finalizeCipherContextAndDispose()
{
    std::scoped_lock aGuard( m_aMutex );
    if ( !m_pCipher )
        throw lang::DisposedException();
 
    rtl_cipher_destroy ( m_pCipher );
    m_pCipher = nullptr;
 
    return uno::Sequence< sal_Int8 >();
}
 
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