diff options
Diffstat (limited to 'binfilter/bf_sw/source/core/sw3io/sw_crypter.cxx')
-rw-r--r-- | binfilter/bf_sw/source/core/sw3io/sw_crypter.cxx | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/binfilter/bf_sw/source/core/sw3io/sw_crypter.cxx b/binfilter/bf_sw/source/core/sw3io/sw_crypter.cxx new file mode 100644 index 000000000000..df69182dd8c0 --- /dev/null +++ b/binfilter/bf_sw/source/core/sw3io/sw_crypter.cxx @@ -0,0 +1,100 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ +#ifdef _MSC_VER +#pragma hdrstop +#endif + +#include <string.h> +#include <tools/string.hxx> + +#include <crypter.hxx> + +namespace binfilter { + + + + +Crypter::Crypter( const ByteString& r ) +{ + // Dies sind Randomwerte, die konstant zur Verschluesselung + // des Passworts verwendet werden. Durch die Verwendung eines + // verschluesselten Passworts wird vermieden, dass das Passwort + // im RAM gehalten wird. + static const BYTE cEncode[] = + { 0xAB, 0x9E, 0x43, 0x05, 0x38, 0x12, 0x4d, 0x44, + 0xD5, 0x7e, 0xe3, 0x84, 0x98, 0x23, 0x3f, 0xba }; + + xub_StrLen nLen = r.Len(); + if( nLen > PASSWDLEN ) nLen = PASSWDLEN; + ByteString aPasswd( r ); + if( nLen > PASSWDLEN ) + aPasswd.Erase( nLen ); + else + aPasswd.Expand( PASSWDLEN, ' ' ); + memcpy( cPasswd, cEncode, PASSWDLEN ); + Encrypt( aPasswd ); + memcpy( cPasswd, aPasswd.GetBuffer(), PASSWDLEN ); +} + + + +void Crypter::Encrypt( ByteString& r ) const +{ + xub_StrLen nLen = r.Len(); + if( !nLen ) + return ; + + xub_StrLen nCryptPtr = 0; + BYTE cBuf[ PASSWDLEN ]; + memcpy( cBuf, cPasswd, PASSWDLEN ); + BYTE* pSrc = (BYTE*)r.GetBufferAccess(); + BYTE* p = cBuf; + + while( nLen-- ) + { + *pSrc = *pSrc ^ ( *p ^ (BYTE) ( cBuf[ 0 ] * nCryptPtr ) ); + *p += ( nCryptPtr < (PASSWDLEN-1) ) ? *(p+1) : cBuf[ 0 ]; + if( !*p ) *p += 1; + p++; + if( ++nCryptPtr >= PASSWDLEN ) nCryptPtr = 0, p = cBuf; + pSrc++; + } +} + + + +void Crypter::Decrypt( ByteString& r ) const +{ + Encrypt( r ); +} + + + +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |