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Diffstat (limited to 'tools/bootstrp/md5.cxx')
| -rw-r--r-- | tools/bootstrp/md5.cxx | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/tools/bootstrp/md5.cxx b/tools/bootstrp/md5.cxx new file mode 100644 index 000000000000..1df85d32ff80 --- /dev/null +++ b/tools/bootstrp/md5.cxx @@ -0,0 +1,152 @@ +/* -*- 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. + * + ************************************************************************/ + +// MARKER(update_precomp.py): autogen include statement, do not remove +#include "precompiled_tools.hxx" + +#include "md5.hxx" + +#include <cstddef> +#include <stdio.h> + +#include <tools/string.hxx> + +#ifdef WNT +#define FILE_OPEN_READ "rb" +#else +#define FILE_OPEN_READ "r" +#endif + +// Extended calc_md5_checksum to recognize Windows executables and libraries. To +// create the same md5 checksum for a (code/data) identical file it ignores a different +// date and header checksum. Please see crashrep/source/win32/soreport.cpp +// where the same method is also used. The crash reporter uses the MD5 +// checksums to transfer them to the crash database. You have to make sure that both +// methods use the same algorithm otherwise there could be problems with stack reports. + +void normalize_pe_image(sal_uInt8* buffer, size_t nBufferSize) +{ + const int OFFSET_PE_OFFSET = 0x3c; + const int OFFSET_COFF_TIMEDATESTAMP = 4; + const int PE_SIGNATURE_SIZE = 4; + const int COFFHEADER_SIZE = 20; + const int OFFSET_PE_OPTIONALHEADER_CHECKSUM = 64; + + // Check the header part of the file buffer + if (buffer[0] == sal_uInt8('M') && buffer[1] == sal_uInt8('Z')) + { + unsigned long PEHeaderOffset = (long)buffer[OFFSET_PE_OFFSET]; + if (PEHeaderOffset < nBufferSize-4) + { + if ( buffer[PEHeaderOffset+0] == sal_uInt8('P') && + buffer[PEHeaderOffset+1] == sal_uInt8('E') && + buffer[PEHeaderOffset+2] == 0 && + buffer[PEHeaderOffset+3] == 0 ) + { + PEHeaderOffset += PE_SIGNATURE_SIZE; + if (PEHeaderOffset+OFFSET_COFF_TIMEDATESTAMP < nBufferSize-4) + { + // Set timedatestamp and checksum fields to a normalized + // value to enforce the same MD5 checksum for identical + // Windows executables/libraries. + buffer[PEHeaderOffset+OFFSET_COFF_TIMEDATESTAMP+0] = 0; + buffer[PEHeaderOffset+OFFSET_COFF_TIMEDATESTAMP+1] = 0; + buffer[PEHeaderOffset+OFFSET_COFF_TIMEDATESTAMP+2] = 0; + buffer[PEHeaderOffset+OFFSET_COFF_TIMEDATESTAMP+3] = 0; + } + + if (PEHeaderOffset+COFFHEADER_SIZE+OFFSET_PE_OPTIONALHEADER_CHECKSUM < nBufferSize-4) + { + // Set checksum to a normalized value + buffer[PEHeaderOffset+COFFHEADER_SIZE+OFFSET_PE_OPTIONALHEADER_CHECKSUM] = 0; + buffer[PEHeaderOffset+COFFHEADER_SIZE+OFFSET_PE_OPTIONALHEADER_CHECKSUM+1] = 0; + buffer[PEHeaderOffset+COFFHEADER_SIZE+OFFSET_PE_OPTIONALHEADER_CHECKSUM+2] = 0; + buffer[PEHeaderOffset+COFFHEADER_SIZE+OFFSET_PE_OPTIONALHEADER_CHECKSUM+3] = 0; + } + } + } + } +} + +rtlDigestError calc_md5_checksum( const char *filename, ByteString &aChecksum ) +{ + const size_t BUFFER_SIZE = 0x1000; + const size_t MINIMAL_SIZE = 512; + + sal_uInt8 checksum[RTL_DIGEST_LENGTH_MD5]; + rtlDigestError error = rtl_Digest_E_None; + + FILE *fp = fopen( filename, FILE_OPEN_READ ); + + if ( fp ) + { + rtlDigest digest = rtl_digest_createMD5(); + + if ( digest ) + { + size_t nBytesRead; + sal_uInt8 buffer[BUFFER_SIZE]; + bool bHeader(true); + + while ( rtl_Digest_E_None == error && + 0 != (nBytesRead = fread( buffer, 1, sizeof(buffer), fp )) ) + { + if (bHeader) + { + bHeader = false; + if (nBytesRead >= MINIMAL_SIZE && buffer[0] == sal_uInt8('M') && buffer[1] == sal_uInt8('Z') ) + normalize_pe_image(buffer, nBytesRead); + } + + error = rtl_digest_updateMD5( digest, buffer, nBytesRead ); + } + + if ( rtl_Digest_E_None == error ) + { + error = rtl_digest_getMD5( digest, checksum, sizeof(checksum) ); + } + + rtl_digest_destroyMD5( digest ); + + for ( std::size_t i = 0; i < sizeof(checksum); i++ ) + { + if ( checksum[i] < 16 ) + aChecksum.Append( "0" ); + aChecksum += ByteString::CreateFromInt32( checksum[i], 16 ); + } + } + + fclose( fp ); + } + else + error = rtl_Digest_E_Unknown; + + return error; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |