/************************************************************************* * * $RCSfile: ZipFile.cxx,v $ * * $Revision: 1.32 $ * * last change: $Author: mtg $ $Date: 2001-10-02 22:07:58 $ * * The Contents of this file are made available subject to the terms of * either of the following licenses * * - GNU Lesser General Public License Version 2.1 * - Sun Industry Standards Source License Version 1.1 * * Sun Microsystems Inc., October, 2000 * * GNU Lesser General Public License Version 2.1 * ============================================= * Copyright 2000 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 * * * Sun Industry Standards Source License Version 1.1 * ================================================= * The contents of this file are subject to the Sun Industry Standards * Source License Version 1.1 (the "License"); You may not use this file * except in compliance with the License. You may obtain a copy of the * License at http://www.openoffice.org/license.html. * * Software provided under this License is provided on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, * WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS, * MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING. * See the License for the specific provisions governing your rights and * obligations concerning the Software. * * The Initial Developer of the Original Code is: Sun Microsystems, Inc. * * Copyright: 2000 by Sun Microsystems, Inc. * * All Rights Reserved. * * Contributor(s): Martin Gallwey (gallwey@sun.com) * * ************************************************************************/ #ifndef _ZIP_FILE_HXX #include #endif #ifndef _ZIP_ENUMERATION_HXX #include #endif #ifndef _VOS_DIAGNOSE_H_ #include #endif #ifndef _COM_SUN_STAR_PACKAGES_ZIP_ZIPCONSTANTS_HPP_ #include #endif #ifndef _RTL_CIPHER_H_ #include #endif #ifndef _RTL_DIGEST_H_ #include #endif #ifndef _XMEMORY_STREAM_HXX #include #endif #ifndef _XFILE_STREAM_HXX #include #endif #ifndef _PACKAGE_CONSTANTS_HXX_ #include #endif #ifndef _UCBHELPER_CONTENTBROKER_HXX #include #endif #ifndef _RTL_USTRBUF_HXX_ #include #endif #ifndef UCBHELPER_FILEIDENTIFIERCONVERTER_HXX_ #include #endif #ifndef _OSL_FILE_HXX_ #include #endif #ifndef _ENCRYPTION_DATA_HXX_ #include #endif #ifndef _MEMORY_BYTE_GRABBER_HXX_ #include #endif #include // for memcpy #include using namespace vos; using namespace ucb; using namespace osl; using namespace rtl; using namespace com::sun::star; using namespace com::sun::star::io; using namespace com::sun::star::uno; using namespace com::sun::star::ucb; using namespace com::sun::star::lang; using namespace com::sun::star::packages; using namespace com::sun::star::packages::zip; using namespace com::sun::star::packages::zip::ZipConstants; /** This class is used to read entries from a zip file */ ZipFile::ZipFile( Reference < XInputStream > &xInput, const Reference < XMultiServiceFactory > &xNewFactory, sal_Bool bInitialise) throw(IOException, ZipException, RuntimeException) : xStream(xInput) , xSeek(xInput, UNO_QUERY) , aGrabber(xInput) , aInflater (sal_True) , xFactory ( xNewFactory ) { if (bInitialise) { if ( readCEN() == -1 ) aEntries.clear(); } } ZipFile::~ZipFile() { aEntries.clear(); } void ZipFile::setInputStream ( Reference < XInputStream > xNewStream ) { xStream = xNewStream; xSeek = Reference < XSeekable > ( xStream, UNO_QUERY ); aGrabber.setInputStream ( xStream ); } void ZipFile::StaticGetCipher ( const ORef < EncryptionData > & xEncryptionData, rtlCipher &rCipher ) { if ( xEncryptionData.isEmpty() ) return; Sequence < sal_uInt8 > aDerivedKey (16); rtlCipherError aResult; Sequence < sal_Int8 > aDecryptBuffer; // Get the key rtl_digest_PBKDF2 ( aDerivedKey.getArray(), 16, reinterpret_cast < const sal_uInt8 * > (xEncryptionData->aKey.getConstArray()), xEncryptionData->aKey.getLength(), xEncryptionData->aSalt.getConstArray(), xEncryptionData->aSalt.getLength(), xEncryptionData->nIterationCount ); rCipher = rtl_cipher_create (rtl_Cipher_AlgorithmBF, rtl_Cipher_ModeStream); aResult = rtl_cipher_init( rCipher, rtl_Cipher_DirectionDecode, aDerivedKey.getConstArray(), aDerivedKey.getLength(), xEncryptionData->aInitVector.getConstArray(), xEncryptionData->aInitVector.getLength()); OSL_ASSERT (aResult == rtl_Cipher_E_None); } Reference < XInputStream > ZipFile::createFileStream( ZipEntry & rEntry, const ORef < EncryptionData > &rData, sal_Bool bRawStream ) { static OUString sServiceName ( RTL_CONSTASCII_USTRINGPARAM ( "com.sun.star.io.TempFile" ) ); Reference < XInputStream > xTempStream = Reference < XInputStream > ( xFactory->createInstance ( sServiceName ), UNO_QUERY ); return new XFileStream ( rEntry, xStream, xTempStream, rData, bRawStream ); } Reference < XInputStream > ZipFile::createMemoryStream( ZipEntry & rEntry, const ORef < EncryptionData > &rData, sal_Bool bRawStream ) { sal_Int32 nUncompressedSize, nEnd; if (bRawStream) { nUncompressedSize = rEntry.nMethod == DEFLATED ? rEntry.nCompressedSize : rEntry.nSize; nEnd = rEntry.nOffset + nUncompressedSize; } else { nUncompressedSize = rEntry.nSize; nEnd = rEntry.nMethod == DEFLATED ? rEntry.nOffset + rEntry.nCompressedSize : rEntry.nOffset + rEntry.nSize; } xSeek->seek(rEntry.nOffset); sal_Int32 nSize = rEntry.nMethod == DEFLATED ? rEntry.nCompressedSize : rEntry.nSize; Sequence < sal_Int8 > aReadBuffer ( nSize ), aDecryptBuffer, aWriteBuffer; rtlCipher aCipher; sal_Bool bMustDecrypt = (!rData.isEmpty() && rData->aSalt.getLength()) ? sal_True : sal_False; if ( bMustDecrypt ) { StaticGetCipher ( rData, aCipher ); aDecryptBuffer.realloc ( nSize ); } if (nSize <0) throw IOException ( ); xStream->readBytes( aReadBuffer, nSize ); // Now it holds the raw stuff from disk if ( bMustDecrypt ) { rtlDigest aDigest = rtl_digest_createSHA1(); rtlDigestError aDigestResult; Sequence < sal_uInt8 > aDigestSeq ( RTL_DIGEST_LENGTH_SHA1 ); rtlCipherError aResult = rtl_cipher_decode ( aCipher, aReadBuffer.getConstArray(), nSize, reinterpret_cast < sal_uInt8 * > (aDecryptBuffer.getArray()), nSize); OSL_ASSERT (aResult == rtl_Cipher_E_None); sal_Int32 nEat = n_ConstDigestLength > nSize ? nSize : n_ConstDigestLength; aDigestResult = rtl_digest_updateSHA1 ( aDigest, static_cast < const void * > ( aDecryptBuffer.getConstArray() ), nEat ); OSL_ASSERT ( aDigestResult == rtl_Digest_E_None ); aDigestResult = rtl_digest_getSHA1 ( aDigest, aDigestSeq.getArray(), RTL_DIGEST_LENGTH_SHA1 ); OSL_ASSERT ( aDigestResult == rtl_Digest_E_None ); if ( aDigestSeq.getLength() != rData->aDigest.getLength() || 0 != rtl_compareMemory ( aDigestSeq.getConstArray(), rData->aDigest.getConstArray(), aDigestSeq.getLength() ) ) { } aReadBuffer = aDecryptBuffer; // Now it holds the decrypted data rtl_digest_destroySHA1 ( aDigest ); } if (bRawStream || rEntry.nMethod == STORED) aWriteBuffer = aReadBuffer; // bRawStream means the caller doesn't want it decompressed else { aInflater.setInputSegment(aReadBuffer, 0, nSize ); aWriteBuffer.realloc( nUncompressedSize ); aInflater.doInflate( aWriteBuffer ); aInflater.reset(); } return Reference < XInputStream > ( new XMemoryStream ( aWriteBuffer ) ); } ZipEnumeration * SAL_CALL ZipFile::entries( ) { return new ZipEnumeration ( aEntries ); } ::rtl::OUString SAL_CALL ZipFile::getName( ) throw(RuntimeException) { return sName; } sal_Int32 SAL_CALL ZipFile::getSize( ) throw(RuntimeException) { return aEntries.size(); } Reference< XInputStream > SAL_CALL ZipFile::getInputStream( ZipEntry& rEntry, const vos::ORef < EncryptionData > &rData) throw(IOException, ZipException, RuntimeException) { if ( rEntry.nOffset <= 0 ) readLOC( rEntry ); return rEntry.nSize > n_ConstMaxMemoryStreamSize ? createFileStream ( rEntry, rData, rEntry.nMethod == STORED ) : createMemoryStream ( rEntry, rData, rEntry.nMethod == STORED ); //return createMemoryStream( rEntry, rData, sal_False ); } Reference< XInputStream > SAL_CALL ZipFile::getRawStream( ZipEntry& rEntry, const vos::ORef < EncryptionData > &rData) throw(IOException, ZipException, RuntimeException) { if ( rEntry.nOffset <= 0 ) readLOC( rEntry ); return ( rEntry.nMethod == DEFLATED ? rEntry.nCompressedSize : rEntry.nSize > n_ConstMaxMemoryStreamSize ) ? createFileStream ( rEntry, rData, sal_True ) : createMemoryStream ( rEntry, rData, sal_True ); //return createMemoryStream( rEntry, rData, sal_True ); } sal_Bool ZipFile::readLOC( ZipEntry &rEntry ) throw(IOException, ZipException, RuntimeException) { sal_uInt32 nTestSig, nTime, nCRC, nSize, nCompressedSize; sal_uInt16 nVersion, nFlag, nHow, nNameLen, nExtraLen; sal_Int32 nPos = -rEntry.nOffset; aGrabber.seek(nPos); aGrabber >> nTestSig; if (nTestSig != LOCSIG) throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "Invalid LOC header (bad signature") ), Reference < XInterface > () ); aGrabber >> nVersion; aGrabber >> nFlag; aGrabber >> nHow; aGrabber >> nTime; aGrabber >> nCRC; aGrabber >> nCompressedSize; aGrabber >> nSize; aGrabber >> nNameLen; aGrabber >> nExtraLen; rEntry.nOffset = static_cast < sal_Int32 > (aGrabber.getPosition()) + nNameLen + nExtraLen; return sal_True; } sal_Int32 ZipFile::findEND( ) throw(IOException, ZipException, RuntimeException) { sal_Int32 nLength, nPos, nEnd; Sequence < sal_Int8 > aBuffer; try { nLength = static_cast (aGrabber.getLength()); if (nLength == 0 || nLength < ENDHDR) return -1; nPos = nLength - ENDHDR - ZIP_MAXNAMELEN; nEnd = nPos >= 0 ? nPos : 0 ; aGrabber.seek( nEnd ); aGrabber.readBytes ( aBuffer, nLength - nEnd ); const sal_Int8 *pBuffer = aBuffer.getConstArray(); nPos = nLength - nEnd - ENDHDR; while ( nPos >= 0 ) { if (pBuffer[nPos] == 'P' && pBuffer[nPos+1] == 'K' && pBuffer[nPos+2] == 5 && pBuffer[nPos+3] == 6 ) return nPos + nEnd; nPos--; } } catch ( IllegalArgumentException& ) { throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "Zip END signature not found!") ), Reference < XInterface > () ); } catch ( NotConnectedException& ) { throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "Zip END signature not found!") ), Reference < XInterface > () ); } catch ( BufferSizeExceededException& ) { throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "Zip END signature not found!") ), Reference < XInterface > () ); } throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "Zip END signature not found!") ), Reference < XInterface > () ); } sal_Int32 ZipFile::readCEN() throw(IOException, ZipException, RuntimeException) { sal_Int32 nCenLen, nCenPos = -1, nCenOff, nEndPos, nLocPos; sal_Int16 nCount, nTotal; try { nEndPos = findEND(); if (nEndPos == -1) return -1; aGrabber.seek(nEndPos + ENDTOT); aGrabber >> nTotal; aGrabber >> nCenLen; aGrabber >> nCenOff; if ( nTotal < 0 || nTotal * CENHDR > nCenLen ) throw ZipException(OUString( RTL_CONSTASCII_USTRINGPARAM ( "invalid END header (bad entry count)") ), Reference < XInterface > () ); if ( nTotal > ZIP_MAXENTRIES ) throw ZipException(OUString( RTL_CONSTASCII_USTRINGPARAM ( "too many entries in ZIP File") ), Reference < XInterface > () ); if ( nCenLen < 0 || nCenLen > nEndPos ) throw ZipException(OUString( RTL_CONSTASCII_USTRINGPARAM ( "Invalid END header (bad central directory size)") ), Reference < XInterface > () ); nCenPos = nEndPos - nCenLen; if ( nCenOff < 0 || nCenOff > nCenPos ) throw ZipException(OUString( RTL_CONSTASCII_USTRINGPARAM ( "Invalid END header (bad central directory size)") ), Reference < XInterface > () ); nLocPos = nCenPos - nCenOff; aGrabber.seek( nCenPos ); Sequence < sal_Int8 > aCENBuffer ( nCenLen ); sal_Int64 nRead = aGrabber.readBytes ( aCENBuffer, nCenLen ); if ( static_cast < sal_Int64 > ( nCenLen ) != nRead ) throw ZipException ( OUString ( RTL_CONSTASCII_USTRINGPARAM ( "Error reading CEN into memory buffer!") ), Reference < XInterface > () ); MemoryByteGrabber aMemGrabber ( aCENBuffer ); ZipEntry aEntry; sal_Int32 nTestSig; sal_Int16 nNameLen, nExtraLen, nCommentLen; for (nCount = 0 ; nCount < nTotal; nCount++) { aMemGrabber >> nTestSig; if ( nTestSig != CENSIG ) throw ZipException(OUString( RTL_CONSTASCII_USTRINGPARAM ( "Invalid CEN header (bad signature)") ), Reference < XInterface > () ); aMemGrabber.skipBytes ( 2 ); aMemGrabber >> aEntry.nVersion; if ( ( aEntry.nVersion & 1 ) == 1 ) throw ZipException(OUString( RTL_CONSTASCII_USTRINGPARAM ( "Invalid CEN header (encrypted entry)") ), Reference < XInterface > () ); aMemGrabber >> aEntry.nFlag; aMemGrabber >> aEntry.nMethod; if ( aEntry.nMethod != STORED && aEntry.nMethod != DEFLATED) throw ZipException(OUString( RTL_CONSTASCII_USTRINGPARAM ( "Invalid CEN header (bad compression method)") ), Reference < XInterface > () ); aMemGrabber >> aEntry.nTime; aMemGrabber >> aEntry.nCrc; aMemGrabber >> aEntry.nCompressedSize; aMemGrabber >> aEntry.nSize; aMemGrabber >> nNameLen; aMemGrabber >> nExtraLen; aMemGrabber >> nCommentLen; aMemGrabber.skipBytes ( 8 ); aMemGrabber >> aEntry.nOffset; aEntry.nOffset += nLocPos; aEntry.nOffset *= -1; if ( nNameLen > ZIP_MAXNAMELEN ) throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "name length exceeds ZIP_MAXNAMELEN bytes" ) ), Reference < XInterface > () ); if ( nCommentLen > ZIP_MAXNAMELEN ) throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "comment length exceeds ZIP_MAXNAMELEN bytes" ) ), Reference < XInterface > () ); if ( nExtraLen > ZIP_MAXEXTRA ) throw ZipException( OUString( RTL_CONSTASCII_USTRINGPARAM ( "extra header info exceeds ZIP_MAXEXTRA bytes") ), Reference < XInterface > () ); aEntry.sName = OUString ( (sal_Char *) aMemGrabber.getCurrentPos(), nNameLen, RTL_TEXTENCODING_ASCII_US); aMemGrabber.skipBytes( nNameLen + nExtraLen + nCommentLen ); aEntries[aEntry.sName] = aEntry; } if (nCount != nTotal) throw ZipException(OUString( RTL_CONSTASCII_USTRINGPARAM ( "Count != Total") ), Reference < XInterface > () ); } catch ( IllegalArgumentException & ) { // seek can throw this... nCenPos = -1; // make sure we return -1 to indicate an error } return nCenPos; }