ddwrt-read-nvram-dump.py

#!/usr/bin/env python
import sys
import os

def nextSetting(f):
    keySize = ord(f.read(1))
    key = f.read(keySize)
    valueSize = ord(f.read(1)) + (ord(f.read(1))*256)
    value= f.read(valueSize)
    #sys.stdout.write ('(k=%3d,v=%4d,pos=%6s) %s = %s\n' % (keySize, valueSize, hex(f.tell()), key, value))
    sys.stdout.write ('%s = %s\n' % (key, value))

with open ('dd-wrt-nvrambak.bin', 'rb') as f:
    print f.read(8) # file format/title
    while  f.tell() < os.fstat(f.fileno()).st_size:
        nextSetting(f)