started framework for people to do breff

breff.py

@@ -0,0 +1,173 @@
+#!/usr/bin/python
+
+import sys, struct
+
+from Struct import Struct
+
+def nullterm(str_plus):
+	z = str_plus.find('\0')
+	if z != -1:
+		return str_plus[:z]
+	else:
+		return str_plus
+
+class BREFF(object):
+	class BREFF_REFF_StringSection1(Struct):
+		__endian__ = Struct.BE
+		def __format__(self):
+			self.offset = Struct.uint32
+			self.length = Struct.uint32
+		def __str__(self):
+			return_string  = "Offset: %08x\n" % self.offset
+			return_string += "Length: %08x\n" % self.length
+			return return_string
+
+	class BREFF_REFF(Struct):
+		__endian__ = Struct.BE
+		def __format__(self):
+			self.magic = Struct.string(4)
+			self.length = Struct.uint32
+			self.chunk_cnt = Struct.uint32
+		def __str__(self):
+			return "Magic: %s\nLength: %08x\nChunk Count: %08x\n" % (self.magic , self.length , self.chunk_cnt)
+
+	class BREFF_Header(Struct):
+		__endian__ = Struct.BE
+		def __format__(self):
+			self.magic = Struct.string(4)
+			self.version = Struct.uint32
+			self.length = Struct.uint32
+			self.header_size = Struct.uint16
+			self.chunk_cnt = Struct.uint16
+		def __str__(self):
+			return_string  = "Magic: %s\n" % self.magic
+			return_string += "Version: %08x\n" % self.version
+			return_string += "Length: %08x\n" % self.length
+			return_string += "Header Size: %04x\n" % self.header_size
+			return_string += "Chunk Count: %04x\n" % self.chunk_cnt
+			return return_string
+
+	def __init__(self, data):
+		self.data = []
+		if data != None:
+			self.Unpack(data)
+
+	def Unpack(self, data):
+		pos = 0
+		header = self.BREFF_Header()
+		header.unpack(data[pos:pos+len(header)])
+		pos += len(header)
+		print header
+		assert header.magic == "REFF"
+		assert header.version == 0xfeff0004
+		reff = self.BREFF_REFF()
+		reff.unpack(data[pos:pos+len(reff)])
+		pos += len(reff)
+		print reff
+		assert reff.magic == "REFF"
+		
+		unknown = Struct.uint32(data[pos:pos+4], endian='>')
+		pos += 4
+		print "Unknown: %08x" % unknown
+		unknown = Struct.uint32(data[pos:pos+4], endian='>')
+		pos += 4
+		print "Unknown: %08x" % unknown
+		str_length = Struct.uint16(data[pos:pos+2], endian='>')
+		pos += 2
+		print "String Length with null added: %04x" % str_length
+		unknown = Struct.uint16(data[pos:pos+2], endian='>')
+		pos += 2
+		print "Unknown: %04x" % unknown
+		string = data[pos:pos+str_length-1]
+		pos += str_length + (2 - (str_length % 2))
+		print "String: %s\n" % string
+
+		unknown = Struct.uint32(data[pos:pos+4], endian='>')
+		pos += 4
+		print "Offset or Length: %08x" % unknown
+
+		print "\n%08x\n" % pos
+
+		string_cnt = Struct.uint16(data[pos:pos+2], endian='>')
+		pos += 2
+		print "String Count: %04x" % string_cnt
+		unknown = Struct.uint16(data[pos:pos+2], endian='>')
+		pos += 2
+		print "Unknown: %04x" % unknown
+
+		print "\n%08x\n" % pos
+
+		for x in xrange(string_cnt):
+			str_length = Struct.uint16(data[pos:pos+2], endian='>')
+			pos += 2
+			print "String Length with null added: %04x" % str_length
+			string = nullterm(data[pos:pos+str_length])
+			pos += str_length 
+			print "String: %s" % string
+			string_section1 = self.BREFF_REFF_StringSection1()
+			string_section1.unpack(data[pos:pos+len(string_section1)])
+			pos += len(string_section1)
+			print string_section1
+
+		print "\n%08x\n" % pos
+
+		while pos % 0x10:
+			padding = Struct.uint8(data[pos:pos+1])
+			pos += 1
+			print "Padding: %02x" % padding
+
+		print "\n%08x\n" % pos
+
+		for x in xrange(string_cnt):
+			pass
+
+		#''' BEGIN TEST DATA  
+		unknown = Struct.uint32(data[pos:pos+4], endian='>')
+		pos += 4
+		print "Unknown: %08x" % unknown
+		unknown = Struct.uint32(data[pos:pos+4], endian='>')
+		pos += 4
+		print "Unknown: %08x" % unknown
+		unknown = Struct.uint32(data[pos:pos+4], endian='>')
+		pos += 4
+		print "Unknown: %08x" % unknown
+		unknown = Struct.uint32(data[pos:pos+4], endian='>')
+		pos += 4
+		print "Unknown: %08x" % unknown
+		unknown = Struct.uint32(data[pos:pos+4], endian='>')
+		pos += 4
+		print "Unknown: %08x" % unknown
+		unknown = Struct.uint32(data[pos:pos+4], endian='>')
+		pos += 4
+		print "Unknown: %08x" % unknown
+		unknown = Struct.uint32(data[pos:pos+4], endian='>')
+		pos += 4
+		print "Unknown: %08x" % unknown
+		unknown = Struct.uint32(data[pos:pos+4], endian='>')
+		pos += 4
+		print "Unknown: %08x" % unknown
+		unknown = Struct.uint32(data[pos:pos+4], endian='>')
+		pos += 4
+		print "Unknown: %08x" % unknown
+		unknown = Struct.uint32(data[pos:pos+4], endian='>')
+		pos += 4
+		print "Unknown: %08x" % unknown
+		#END TEST DATA '''
+
+def main():
+	if len(sys.argv) != 2:
+		print 'Usage: python breff.py <filename>'
+		sys.exit(1)
+
+	f = open(sys.argv[1], 'rb')
+	if f:
+		reff = f.read()
+		f.close()
+		assert reff[0:8] == 'REFF\xfe\xff\x00\x04'
+		breff = BREFF(reff)
+	else:
+		print 'Could not open %s' % sys.argv[1]
+		sys.exit(1)
+
+if __name__ == "__main__":
+	main()