MISC图片批量处理jio本

此处以ctfshow中MISC入门题目作为切入点

感兴趣的同学可以一边做题一边参照

批量修改PNG图片的宽

import zlib

import struct

filename = "flag.png"

with open(filename, 'rb') as f:

	all_b = f.read()

	#w = all_b[16:20]

	#h = all_b[20:24]

	for i in range(901, 1200):

		name = str(i) + ".png"

		f1 = open(name, "wb")

		im = all_b[:16] + struct.pack('>i', i) + all_b[20:]

		f1.write(im)

		f1.close()

批量修改JPG图片的宽

import zlib

import struct

filename = "flag.jpg"

with open(filename, 'rb') as f:

	all_b = f.read()

	#w = all_b[159:161]

	#h = all_b[157:159]

	for i in range(901, 1200):

		name = str(i) + ".jpg"

		f1 = open(name, "wb")

		im = all_b[:159] + struct.pack('>i', i) + all_b[161:]

		f1.write(im)

		f1.close()

批量修改GIF图片的宽

import zlib

import struct

filename = "flag.gif"

with open(filename, 'rb') as f:

	all_b = f.read()

	#w = all_b[38:40]

	#h = all_b[36:38]

	for i in range(901, 1200):

		name = str(i) + ".gif"

		f1 = open(name, "wb")

		im = all_b[:38] + struct.pack('>i', i) + all_b[40:]

		f1.write(im)

		f1.close()

MISC图片批量处理jio本的相关教程结束。