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version 0.19 2009-12-10
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decalage
Martin Panter
parent
70a99619bc
commit
61a3ceb812
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@ -6,9 +6,9 @@ OleFileIO_PL:
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Microsoft Compound Document File Format), such as Microsoft Office
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documents, Image Composer and FlashPix files, Outlook messages, ...
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version 0.18 2007-12-05 Philippe Lagadec - http://lagasoft.free.fr
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version 0.19 2009-12-10 Philippe Lagadec - http://www.decalage.info
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Project website: http://lagasoft.free.fr/python/olefileio
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Project website: http://www.decalage.info/python/olefileio
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Improved version of the OleFileIO module from PIL library v1.1.6
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See: http://www.pythonware.com/products/pil/index.htm
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@ -16,7 +16,7 @@ See: http://www.pythonware.com/products/pil/index.htm
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The Python Imaging Library (PIL) is
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Copyright (c) 1997-2005 by Secret Labs AB
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Copyright (c) 1995-2005 by Fredrik Lundh
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OleFileIO_PL changes are Copyright (c) 2005-2007 by Philippe Lagadec
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OleFileIO_PL changes are Copyright (c) 2005-2009 by Philippe Lagadec
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See source code and LICENSE.txt for information on usage and redistribution.
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@ -24,15 +24,15 @@ WARNING: THIS IS (STILL) WORK IN PROGRESS.
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"""
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__author__ = "Fredrik Lundh (Secret Labs AB), Philippe Lagadec"
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__date__ = "2007-12-08"
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__version__ = '0.18'
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__date__ = "2009-12-10"
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__version__ = '0.19'
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#--- LICENSE ------------------------------------------------------------------
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# OleFileIO_PL is an improved version of the OleFileIO module from the
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# Python Imaging Library (PIL).
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# OleFileIO_PL changes are Copyright (c) 2005-2007 by Philippe Lagadec
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# OleFileIO_PL changes are Copyright (c) 2005-2009 by Philippe Lagadec
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#
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# The Python Imaging Library (PIL) is
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# Copyright (c) 1997-2005 by Secret Labs AB
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@ -102,6 +102,8 @@ __version__ = '0.18'
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# 2007-12-05 v0.18 PL: - fixed several bugs in handling of FAT, MiniFAT and
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# streams
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# - added option '-c' in main to check all streams
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# 2009-12-10 v0.19 PL: - bugfix for 32 bit arrays on 64 bits platforms
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# (thanks to Ben G. and Martijn for reporting the bug)
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#-----------------------------------------------------------------------------
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# TODO (for version 1.0):
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@ -193,6 +195,16 @@ import string, StringIO, struct, array, os.path
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#[PL] Define explicitly the public API to avoid private objects in pydoc:
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__all__ = ['OleFileIO', 'isOleFile']
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#[PL] workaround to fix an issue with array item size on 64 bits systems:
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if array.array('L').itemsize == 4:
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# on 32 bits platforms, long integers in an array are 32 bits:
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UINT32 = 'L'
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elif array.array('I').itemsize == 4:
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# on 64 bits platforms, integers in an array are 32 bits:
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UINT32 = 'I'
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else:
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raise ValueError, 'Need to fix a bug with 32 bit arrays, please contact author...'
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#[PL] These workarounds were inspired from the Path module
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# (see http://www.jorendorff.com/articles/python/path/)
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@ -1044,7 +1056,7 @@ class OleFileIO:
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if not DEBUG_MODE:
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return
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VPL=8 # number of values per line (8+1 * 8+1 = 81)
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tab = array.array('L', sector)
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tab = array.array(UINT32, sector)
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nbsect = len(tab)
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nlines = (nbsect+VPL-1)/VPL
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print "index",
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@ -1076,7 +1088,7 @@ class OleFileIO:
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fat1 = sect
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else:
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# if it's a raw sector, it is parsed in an array
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fat1 = array.array('L', sect)
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fat1 = array.array(UINT32, sect)
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self.dumpsect(sect)
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# The FAT is a sector chain starting at the first index of itself.
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for isect in fat1:
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@ -1088,7 +1100,7 @@ class OleFileIO:
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s = self.getsect(isect)
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# parse it as an array of 32 bits integers, and add it to the
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# global FAT array
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self.fat = self.fat + array.array('L', s)
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self.fat = self.fat + array.array(UINT32, s)
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return isect
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@ -1106,7 +1118,7 @@ class OleFileIO:
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# [PL] FAT is an array of 32 bits unsigned ints, it's more effective
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# to use an array than a list in Python.
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# It's initialized as empty first:
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self.fat = array.array('L')
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self.fat = array.array(UINT32)
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self.loadfat_sect(sect)
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#self.dumpfat(self.fat)
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## for i in range(0, len(sect), 4):
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@ -1116,7 +1128,7 @@ class OleFileIO:
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## break
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## s = self.getsect(ix)
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## #fat = fat + map(lambda i, s=s: i32(s, i), range(0, len(s), 4))
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## fat = fat + array.array('L', s)
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## fat = fat + array.array(UINT32, s)
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if self.csectDif != 0:
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# [PL] There's a DIFAT because file is larger than 6.8MB
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# some checks just in case:
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@ -1139,7 +1151,7 @@ class OleFileIO:
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debug( "DIFAT block %d, sector %X" % (i, isect_difat) )
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#TODO: check if corresponding FAT SID = DIFSECT
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sector_difat = self.getsect(isect_difat)
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difat = array.array('L', sector_difat)
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difat = array.array(UINT32, sector_difat)
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self.dumpsect(sector_difat)
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self.loadfat_sect(difat[:127])
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# last DIFAT pointer is next DIFAT sector:
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@ -1189,7 +1201,7 @@ class OleFileIO:
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s = self._open(self.minifatsect, stream_size, force_FAT=True).read()
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#[PL] Old code replaced by an array:
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#self.minifat = map(lambda i, s=s: i32(s, i), range(0, len(s), 4))
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self.minifat = array.array('L', s)
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self.minifat = array.array(UINT32, s)
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# Then shrink the array to used size, to avoid indexes out of MiniStream:
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debug('MiniFAT shrunk from %d to %d sectors' % (len(self.minifat), nb_minisectors))
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self.minifat = self.minifat[:nb_minisectors]
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@ -1544,11 +1556,11 @@ if __name__ == "__main__":
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print """
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Launched from command line, this script parses OLE files and prints info.
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Usage: OleFileIO_PL.py [-d] [-s] <file> [file2 ...]
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Usage: OleFileIO_PL.py [-d] [-c] <file> [file2 ...]
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Options:
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-d : debug mode (display a lot of debug information, for developers only)
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-s : check all streams (for debugging purposes)
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-c : check all streams (for debugging purposes)
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"""
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sys.exit()
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