Swizzle extraction toolkit (Python 2.7)

swizzle.py

import sys
import binascii

chunklen = 32
maxbyte = 31
data = sys.stdin.read()
all_bytes_once_ascending = [chr(i) for i in range(chunklen)]

start = 0
while start < len(data)-chunklen:
    chunk = data[start:start+chunklen]
    lastchar = chunk[chunklen-1]
    if ord(lastchar) > maxbyte:
        # skip whole chunk, because it cannot match
        start += chunklen
    else:
        if sorted(chunk) == all_bytes_once_ascending:
            print "Found at 0x%02x: %s" % (start, binascii.hexlify(chunk))
            p = ["0x%02x, " % ord(c) for c in chunk]
            for line in range(4):
                print "  " + "".join(p[line*8:line*8+8])
        start += 1