/************************************************************************* * * OpenOffice.org - a multi-platform office productivity suite * * $RCSfile: Base64Codec.cxx,v $ * * $Revision: 1.5 $ * * last change: $Author: obo $ $Date: 2006-09-17 17:22:34 $ * * The Contents of this file are made available subject to * the terms of GNU Lesser General Public License Version 2.1. * * * GNU Lesser General Public License Version 2.1 * ============================================= * Copyright 2005 by Sun Microsystems, Inc. * 901 San Antonio Road, Palo Alto, CA 94303, USA * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License version 2.1, as published by the Free Software Foundation. * * This library 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 for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA * ************************************************************************/ // MARKER(update_precomp.py): autogen include statement, do not remove #include "precompiled_package.hxx" #ifndef _BASE64_CODEC_HXX #include "Base64Codec.hxx" #endif #ifndef _RTL_USTRBUF_HXX_ #include #endif #ifndef _OSL_DIAGNOSE_H_ #include #endif using namespace rtl; using namespace osl; using namespace com::sun::star; const sal_Char aBase64EncodeTable[] = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/' }; const sal_uInt8 aBase64DecodeTable[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0-15 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16-31 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 62, 0, 0, 0, 63, // 32-47 // + / 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 0, 0, 0, 0, 0, 0, // 48-63 // 0 1 2 3 4 5 6 7 8 9 = 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, // 64-79 // A B C D E F G H I J K L M N O 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 0, 0, 0, 0, 0, // 80-95 // P Q R S T U V W X Y Z 0, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, // 96-111 // a b c d e f g h i j k l m n o 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 0, 0, 0, 0, 0, // 112-127 // p q r s t u v w x y z 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; void ThreeByteToFourByte (const sal_uInt8* pBuffer, const sal_Int32 nStart, const sal_Int32 nFullLen, rtl::OUStringBuffer& sBuffer) { sal_Int32 nLen(nFullLen - nStart); if (nLen > 3) nLen = 3; if (nLen == 0) { sBuffer.setLength(0); return; } sal_Int32 nBinaer; switch (nLen) { case 1: { nBinaer = ((sal_uInt8)pBuffer[nStart + 0]) << 16; } break; case 2: { nBinaer = (((sal_uInt8)pBuffer[nStart + 0]) << 16) + (((sal_uInt8)pBuffer[nStart + 1]) << 8); } break; default: { nBinaer = (((sal_uInt8)pBuffer[nStart + 0]) << 16) + (((sal_uInt8)pBuffer[nStart + 1]) << 8) + ((sal_uInt8)pBuffer[nStart + 2]); } break; } sBuffer.appendAscii("===="); sal_uInt8 nIndex = static_cast< sal_uInt8 >((nBinaer & 0xFC0000) >> 18); sBuffer.setCharAt(0, aBase64EncodeTable [nIndex]); nIndex = static_cast< sal_uInt8 >((nBinaer & 0x3F000) >> 12); sBuffer.setCharAt(1, aBase64EncodeTable [nIndex]); if (nLen == 1) return; nIndex = static_cast< sal_uInt8 >((nBinaer & 0xFC0) >> 6); sBuffer.setCharAt(2, aBase64EncodeTable [nIndex]); if (nLen == 2) return; nIndex = static_cast< sal_uInt8 >(nBinaer & 0x3F); sBuffer.setCharAt(3, aBase64EncodeTable [nIndex]); } void Base64Codec::encodeBase64(rtl::OUStringBuffer& aStrBuffer, const uno::Sequence < sal_uInt8 >& aPass) { sal_Int32 i(0); sal_Int32 nBufferLength(aPass.getLength()); const sal_uInt8* pBuffer = aPass.getConstArray(); while (i < nBufferLength) { rtl::OUStringBuffer sBuffer; ThreeByteToFourByte (pBuffer, i, nBufferLength, sBuffer); aStrBuffer.append(sBuffer); i += 3; } } const rtl::OUString s2equal(RTL_CONSTASCII_USTRINGPARAM("==")); const rtl::OUString s1equal(RTL_CONSTASCII_USTRINGPARAM("=")); void FourByteToThreeByte (sal_uInt8* pBuffer, sal_Int32& nLength, const sal_Int32 nStart, const rtl::OUString& sString) { nLength = 0; sal_Int32 nLen (sString.getLength()); OSL_ASSERT( nLen == 4 ); if (nLen != 4) return; if (sString.indexOf(s2equal) == 2) nLength = 1; else if (sString.indexOf(s1equal) == 3) nLength = 2; else nLength = 3; sal_Int32 nBinaer ((aBase64DecodeTable [sString [0]] << 18) + (aBase64DecodeTable [sString [1]] << 12) + (aBase64DecodeTable [sString [2]] << 6) + (aBase64DecodeTable [sString [3]])); sal_uInt8 OneByte = static_cast< sal_uInt8 >((nBinaer & 0xFF0000) >> 16); pBuffer[nStart + 0] = (sal_uInt8)OneByte; if (nLength == 1) return; OneByte = static_cast< sal_uInt8 >((nBinaer & 0xFF00) >> 8); pBuffer[nStart + 1] = OneByte; if (nLength == 2) return; OneByte = static_cast< sal_uInt8 >(nBinaer & 0xFF); pBuffer[nStart + 2] = OneByte; } void Base64Codec::decodeBase64(uno::Sequence< sal_uInt8 >& aBuffer, const rtl::OUString& sBuffer) { sal_Int32 nFirstLength((sBuffer.getLength() / 4) * 3); sal_uInt8* pBuffer = new sal_uInt8[nFirstLength]; sal_Int32 nSecondLength(0); sal_Int32 nLength(0); sal_Int32 i = 0; sal_Int32 k = 0; while (i < sBuffer.getLength()) { FourByteToThreeByte (pBuffer, nLength, k, sBuffer.copy(i, 4)); nSecondLength += nLength; nLength = 0; i += 4; k += 3; } aBuffer = uno::Sequence(pBuffer, nSecondLength); delete[] pBuffer; }