def _build_storage(self):
mapping = [
(1, 'MSCompressed', (LZXCOMPRESS_GUID, )),
(2, 'EbEncryptDS', (LZXCOMPRESS_GUID, DESENCRYPT_GUID)),
(3, 'EbEncryptOnlyDS', (DESENCRYPT_GUID, )),
]
for secnum, name, transforms in mapping:
root = '::DataSpace/Storage/' + name
data = self._sections[secnum].getvalue()
cdata, sdata, tdata, rdata = '', '', '', ''
for guid in transforms:
tdata = packguid(guid) + tdata
sdata = sdata + pack('<Q', len(data))
if guid == DESENCRYPT_GUID:
cdata = MSDES_CONTROL + cdata
if not data:
continue
msdes.deskey(self._bookkey, msdes.EN0)
pad = 8 - (len(data) & 0x7)
if pad != 8:
data = data + ('\0' * pad)
data = msdes.des(data)
elif guid == LZXCOMPRESS_GUID:
cdata = LZXC_CONTROL + cdata
if not data:
continue
unlen = len(data)
lzx = Compressor(17)
data, rtable = lzx.compress(data, flush=True)
rdata = StringIO()
rdata.write(
pack('<IIIIQQQQ', 3, len(rtable), 8, 0x28, unlen,
len(data), 0x8000, 0))
for uncomp, comp in rtable[:-1]:
rdata.write(pack('<Q', comp))
rdata = rdata.getvalue()
self._add_file(root + '/Content', data)
self._add_file(root + '/ControlData', cdata)
self._add_file(root + '/SpanInfo', sdata)
self._add_file(root + '/Transform/List', tdata)
troot = root + '/Transform'
for guid in transforms:
dname = self._djoin(troot, guid, 'InstanceData')
self._add_folder(dname)
if guid == LZXCOMPRESS_GUID:
dname += '/ResetTable'
self._add_file(dname, rdata)
def _build_storage(self):
mapping = [(1, 'MSCompressed', (LZXCOMPRESS_GUID,)),
(2, 'EbEncryptDS', (LZXCOMPRESS_GUID, DESENCRYPT_GUID)),
(3, 'EbEncryptOnlyDS', (DESENCRYPT_GUID,)),]
for secnum, name, transforms in mapping:
root = '::DataSpace/Storage/' + name
data = self._sections[secnum].getvalue()
cdata, sdata, tdata, rdata = '', '', '', ''
for guid in transforms:
tdata = packguid(guid) + tdata
sdata = sdata + pack('<Q', len(data))
if guid == DESENCRYPT_GUID:
cdata = MSDES_CONTROL + cdata
if not data:
continue
msdes.deskey(self._bookkey, msdes.EN0)
pad = 8 - (len(data) & 0x7)
if pad != 8:
data = data + ('\0' * pad)
data = msdes.des(data)
elif guid == LZXCOMPRESS_GUID:
cdata = LZXC_CONTROL + cdata
if not data:
continue
unlen = len(data)
lzx = Compressor(17)
data, rtable = lzx.compress(data, flush=True)
rdata = StringIO()
rdata.write(pack('<IIIIQQQQ',
3, len(rtable), 8, 0x28, unlen, len(data), 0x8000, 0))
for uncomp, comp in rtable[:-1]:
rdata.write(pack('<Q', comp))
rdata = rdata.getvalue()
self._add_file(root + '/Content', data)
self._add_file(root + '/ControlData', cdata)
self._add_file(root + '/SpanInfo', sdata)
self._add_file(root + '/Transform/List', tdata)
troot = root + '/Transform'
for guid in transforms:
dname = self._djoin(troot, guid, 'InstanceData')
self._add_folder(dname)
if guid == LZXCOMPRESS_GUID:
dname += '/ResetTable'
self._add_file(dname, rdata)
