hbc/pywii/pywii-tools/extractfiles.py

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2016-11-23 06:35:12 +01:00
#!/usr/bin/env python
import sys, os, os.path
import pywii as wii
wii.loadkeys()
def parseint(d):
if len(d) > 2 and d[0:2].lower()=='0x':
return int(d,16)
return int(d)
if len(sys.argv) < 4 or len(sys.argv) > 7:
print "Usage:"
print " python %s <encrypted ISO> <partition number> <root path to extract to> "%sys.argv[0]
sys.exit(1)
iso_name, partno, data_name = sys.argv[1:4]
partno = int(partno)
part_offset = 0
data_offset = 0
copy_length = None
if len(sys.argv) >= 5:
part_offset = parseint(sys.argv[4])
if len(sys.argv) == 6:
copy_length = parseint(sys.argv[5])
if copy_length is not None and copy_length < 0:
print "Error: negative copy length"
sys.exit(1)
disc = wii.WiiDisc(iso_name)
disc.showinfo()
part = wii.WiiCachedPartition(disc, partno, cachesize=32, debug=False, checkhash=False)
if part_offset >= part.data_bytes:
print "Error: Offset past end of partition"
sys.exit(1)
if copy_length is None:
copy_length = part.data_bytes - part_offset
if copy_length > (part.data_bytes - part_offset):
print "Error: Length too large"
sys.exit(1)
dataf = open(data_name, "wb")
left = copy_length
offset = part_offset
while left > 0:
blocklen = min(left, 4*1024*1024)
d = part.read(offset, blocklen)
if len(d) != blocklen:
print "Part EOF reached!"
sys.exit(1)
dataf.write(d)
offset += blocklen
left -= blocklen
dataf.close()