Class: Rex::OLE::Header
- Inherits:
-
Object
- Object
- Rex::OLE::Header
- Defined in:
- lib/rex/ole/header.rb
Instance Attribute Summary collapse
-
#_csectDif ⇒ Object
Returns the value of attribute _csectDif.
-
#_csectFat ⇒ Object
Returns the value of attribute _csectFat.
-
#_csectMiniFat ⇒ Object
Returns the value of attribute _csectMiniFat.
-
#_sectDifStart ⇒ Object
Returns the value of attribute _sectDifStart.
-
#_sectDirStart ⇒ Object
Returns the value of attribute _sectDirStart.
-
#_sectFat ⇒ Object
Returns the value of attribute _sectFat.
-
#_sectMiniFatStart ⇒ Object
Returns the value of attribute _sectMiniFatStart.
-
#_ulMiniSectorCutoff ⇒ Object
Returns the value of attribute _ulMiniSectorCutoff.
-
#_uMajorVersion ⇒ Object
Returns the value of attribute _uMajorVersion.
-
#_uMiniSectorShift ⇒ Object
Returns the value of attribute _uMiniSectorShift.
-
#idx_per_sect ⇒ Object
Returns the value of attribute idx_per_sect.
-
#mini_sector_size ⇒ Object
Returns the value of attribute mini_sector_size.
-
#sector_size ⇒ Object
Returns the value of attribute sector_size.
Instance Method Summary collapse
-
#initialize ⇒ Header
constructor
A new instance of Header.
-
#read(fd) ⇒ Object
low-level functions.
- #set_defaults ⇒ Object
- #to_s ⇒ Object
- #write(fd) ⇒ Object
Constructor Details
#initialize ⇒ Header
Returns a new instance of Header.
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# File 'lib/rex/ole/header.rb', line 32 def initialize set_defaults # calculate some numbers (save a little math) @sector_size = 1 << @_uSectorShift @mini_sector_size = 1 << @_uMiniSectorShift @idx_per_sect = @sector_size / 4 end |
Instance Attribute Details
#_csectDif ⇒ Object
Returns the value of attribute _csectDif.
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# File 'lib/rex/ole/header.rb', line 25 def _csectDif @_csectDif end |
#_csectFat ⇒ Object
Returns the value of attribute _csectFat.
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# File 'lib/rex/ole/header.rb', line 22 def _csectFat @_csectFat end |
#_csectMiniFat ⇒ Object
Returns the value of attribute _csectMiniFat.
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# File 'lib/rex/ole/header.rb', line 23 def _csectMiniFat @_csectMiniFat end |
#_sectDifStart ⇒ Object
Returns the value of attribute _sectDifStart.
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# File 'lib/rex/ole/header.rb', line 25 def _sectDifStart @_sectDifStart end |
#_sectDirStart ⇒ Object
Returns the value of attribute _sectDirStart.
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# File 'lib/rex/ole/header.rb', line 26 def _sectDirStart @_sectDirStart end |
#_sectFat ⇒ Object
Returns the value of attribute _sectFat.
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# File 'lib/rex/ole/header.rb', line 22 def _sectFat @_sectFat end |
#_sectMiniFatStart ⇒ Object
Returns the value of attribute _sectMiniFatStart.
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# File 'lib/rex/ole/header.rb', line 23 def _sectMiniFatStart @_sectMiniFatStart end |
#_ulMiniSectorCutoff ⇒ Object
Returns the value of attribute _ulMiniSectorCutoff.
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# File 'lib/rex/ole/header.rb', line 24 def _ulMiniSectorCutoff @_ulMiniSectorCutoff end |
#_uMajorVersion ⇒ Object
Returns the value of attribute _uMajorVersion.
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# File 'lib/rex/ole/header.rb', line 27 def _uMajorVersion @_uMajorVersion end |
#_uMiniSectorShift ⇒ Object
Returns the value of attribute _uMiniSectorShift.
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# File 'lib/rex/ole/header.rb', line 24 def _uMiniSectorShift @_uMiniSectorShift end |
#idx_per_sect ⇒ Object
Returns the value of attribute idx_per_sect.
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# File 'lib/rex/ole/header.rb', line 29 def idx_per_sect @idx_per_sect end |
#mini_sector_size ⇒ Object
Returns the value of attribute mini_sector_size.
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# File 'lib/rex/ole/header.rb', line 30 def mini_sector_size @mini_sector_size end |
#sector_size ⇒ Object
Returns the value of attribute sector_size.
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# File 'lib/rex/ole/header.rb', line 29 def sector_size @sector_size end |
Instance Method Details
#read(fd) ⇒ Object
low-level functions
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# File 'lib/rex/ole/header.rb', line 128 def read(fd) buf = fd.read(HDR_SZ) @_abSig = buf[0x00,8] if (@_abSig != SIG) and (@_abSig != SIG_BETA) raise RuntimeError, 'Invalid signature for OLE file' end @_clid = CLSID.new(buf[0x08,16]) @_uByteOrder = Util.get16(buf, 0x1c) Util.set_endian(@_uByteOrder) @_uMinorVersion = Util.get16(buf, 0x18) @_uMajorVersion = Util.get16(buf, 0x1a) @_uSectorShift = Util.get16(buf, 0x1e) @_uMiniSectorShift = Util.get16(buf, 0x20) # ignore reserved bytes @_csectDir = Util.get32(buf, 0x28) # NOTE: only for v4 files @_csectFat = Util.get32(buf, 0x2c) @_sectDirStart = Util.get32(buf, 0x30) @_signature = Util.get32(buf, 0x34) @_ulMiniSectorCutoff = Util.get32(buf, 0x38) @_sectMiniFatStart = Util.get32(buf, 0x3c) @_csectMiniFat = Util.get32(buf, 0x40) @_sectDifStart = Util.get32(buf, 0x44) @_csectDif = Util.get32(buf, 0x48) @_sectFat = Util.get32array(buf[0x4c, (109 * 4)]) end |
#set_defaults ⇒ Object
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# File 'lib/rex/ole/header.rb', line 41 def set_defaults @_abSig = SIG @_clid = CLSID.new @_uByteOrder = LITTLE_ENDIAN @_uMinorVersion = 0x3e @_uMajorVersion = 0x03 @_uSectorShift = 9 # 512 byte sectors @_uMiniSectorShift = 6 # 64 byte mini-sectors @_csectDir = nil # TBD (v4 only, 1 required) @_csectFat = nil # TBD (one required) @_sectDirStart = nil # TBD (one required) @_signature = 0 # no transactions support @_ulMiniSectorCutoff = 0x1000 # 4k @_sectMiniFatStart = SECT_END # TBD @_csectMiniFat = 0 # TBD @_sectDifStart = SECT_END # TBD (default to none) @_csectDif = 0 # TBD (default to none) @_sectFat = [] # TBD end |
#to_s ⇒ Object
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# File 'lib/rex/ole/header.rb', line 69 def to_s ret = "{\n" ret << " _abSig => \"%s\"" % Util.Printable(@_abSig) ret << ",\n" ret << " _clid => %s" % @_clid.to_s ret << ",\n" ret << " _uMinorVersion => 0x%04x" % @_uMinorVersion ret << ",\n" ret << " _uMajorVersion => 0x%04x" % @_uMajorVersion ret << ",\n" ret << " _uByteOrder => 0x%04x" % @_uByteOrder ret << ",\n" ret << " _uSectorShift => 0x%04x" % @_uSectorShift ret << ",\n" ret << " _uMiniSectorShift => 0x%04x" % @_uMiniSectorShift ret << ",\n" if (@_csectDir) ret << " _csectDir => 0x%08x" % @_csectDir else ret << " _csectDir => UNALLOCATED" % @_csectDir end ret << ",\n" if (@_csectFat) ret << " _csectFat => 0x%08x" % @_csectFat else ret << " _csectFat => UNALLOCATED" end ret << ",\n" if (@_sectDirStart) ret << " _sectDirStart => 0x%08x" % @_sectDirStart else ret << " _sectDirStart => UNALLOCATED" end ret << ",\n" ret << " _signature => 0x%08x" % @_signature ret << ",\n" ret << " _uMiniSectorCutoff => 0x%08x" % @_ulMiniSectorCutoff ret << ",\n" ret << " _sectMiniFatStart => 0x%08x" % @_sectMiniFatStart ret << ",\n" ret << " _csectMiniFat => 0x%08x" % @_csectMiniFat ret << ",\n" ret << " _sectDifStart => 0x%08x" % @_sectDifStart ret << ",\n" ret << " _csectDif => 0x%08x" % @_csectDif #ret << ",\n" #ret << " _sectFat => " #ret << Rex::Text.to_hex_dump32array(@_sectFat) ret << "\n}" ret end |
#write(fd) ⇒ Object
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# File 'lib/rex/ole/header.rb', line 165 def write(fd) hdr = "" hdr << @_abSig hdr << @_clid.pack hdr << Util.pack16(@_uMinorVersion) hdr << Util.pack16(@_uMajorVersion) hdr << Util.pack16(@_uByteOrder) hdr << Util.pack16(@_uSectorShift) hdr << Util.pack16(@_uMiniSectorShift) if (@_uMajorVersion == 0x04) hdr << "\x00" * 6 # reserved bytes hdr << Util.pack32(@_csectDir) else hdr << "\x00" * 10 # reserved bytes end fs_count = @_csectFat fs_count ||= 0 hdr << Util.pack32(fs_count) dir_start = @_sectDirStart dir_start ||= SECT_END hdr << Util.pack32(dir_start) hdr << Util.pack32(@_signature) hdr << Util.pack32(@_ulMiniSectorCutoff) hdr << Util.pack32(@_sectMiniFatStart) hdr << Util.pack32(@_csectMiniFat) hdr << Util.pack32(@_sectDifStart) hdr << Util.pack32(@_csectDif) hdr << Util.pack32array(@_sectFat) fd.seek(0, ::IO::SEEK_SET) fd.write(hdr) end |