Initial commit

pywii/pywii-tools/extract.py

@@ -0,0 +1,59 @@
+#!/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> <file to extract to> [Partition offset] [length]"%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()
+