浅谈Python在CTF中的运用

#-*-coding:utf-8-*-
#author:hell0_w
#本人博客：http://hell0w.cnblogs.com/

import base64
import bubblepy
import urllib
import quopri
import cgi
import HTMLParser
import requests

#加密函数：
def base16_encode(content):
 return base64.b16encode(content)
def base32_encode(content):
 return base64.b32encode(content)
def base64_encode(content):
 return base64.b64encode(content)
def BubbleBabble_encode(content):
 return bubblepy.BubbleBabble().encode(content)
def url_encode(content):
 return urllib.quote(content)
def dec_binary(content):
 list = []
 for i in content.split(' '):
 list.append(bin(int(i)).replace('0b',''))
 return list
def str_binary(content):
 list = []
 for i in content:
 list.append(ord(i))
 list1 = []
 for j in list:
 list1.append(bin(int(j)).replace('0b',''))
 return list1
def quoted_printable_encode(content):
 return quopri.encodestring(content)
def HtmlParser_encode(content):
 return cgi.escape(content)


#解密函数：
def base16_decode(content):
 return base64.b16decode(content)
def base32_decode(content):
 return base64.b32decode(content)
def base64_decode(content):
 return base64.b64decode(content)
def BubbleBabble_decode(content):
 return bubblepy.BubbleBabble().decode(content)
def url_decode(content):
 return urllib.unquote(content)
def binary_dec(content):
 list = []
 for i in content.split(' '):
 list.append(int(i,2))
 return list
def binary_str(content):
 list = []
 for i in content.split(' '):
 list.append(int(i,2))
 list1 =[]
 for j in list:
 list1.append(chr(j))
 return ''.join(list1)
def quoted_printable_decode(content):
 return quopri.decodestring(content)
def HtmlParser_decode(content):
 return HTMLParser.HTMLParser().unescape(content)


def encode():
 print "[1]:base16编码"
 print "[2]:base32编码"
 print "[3]:base64编码"
 print "[4]:BubbleBabble编码"
 print "[5]:url编码"
 print "[6]:十进制转二进制"
 print "[7]:字符串转二进制"
 print "[8]:quoted-printable编码"
 print "[9]:HTML实体编码"
 operation = input("请选择：")
 strs = raw_input("请输入需要加密的字符串：")
 if operation == 1:
 try:
 print "[+]加密的结果为：%s " % base16_encode(strs)
 except Exception,e:
 print e

 elif operation == 2:
 try:
  print "[+]加密的结果为：%s " % base32_encode(strs)
 except Exception,e:
 print e

 elif operation == 3:
 try:
 print "[+]加密的结果为：%s " % base64_encode(strs)
 except Exception,e:
 print e

 elif operation == 4:
 try:
 print "[+]加密的结果为：%s " % BubbleBabble_encode(strs)
 except Exception,e:
 print e

 elif operation == 5:
 try:
 print "[+]加密的结果为：%s " % url_encode(strs)
 except Exception,e:
 print e

 elif operation == 6:
 try:
 print "[+]加密的结果为：%s " % dec_binary(strs)
 except Exception,e:
 print e

 elif operation == 7:
 try:
 print "[+]加密的结果为：%s " % str_binary(strs)
 except Exception,e:
 print e

 elif operation == 8:
 try:
 print "[+]加密的结果为：%s " % quoted_printable_encode(strs)
 except Exception,e:
 print e

 elif operation == 9:
 try:
  print "[+]加密的结果为：%s " % HtmlParser_encode(strs)
 except Exception,e:
 print e
 else:
 print "error!"
 encode()


def decode():
 print "[1]:base16解码"
 print "[2]:base32解码"
 print "[3]:base64解码"
 print "[4]:BubbleBabble解码"
 print "[5]:url解码"
 print "[6]:二进制转十进制"
 print "[7]:二进制转字符串"
 print "[8]:quoted-printable解码"
 print "[9]:HTML实体解码"
 operation = input("请选择：")
 strs = raw_input("请输入需要解密的字符串：")
 if operation == 1:
  try:
 print "[+]解密的结果为：%s " % base16_decode(strs)
 except Exception,e:
 print "Error!Not base16 encoding!"

 elif operation == 2:
 try:
 print "[+]解密的结果为：%s " % base32_decode(strs)
 except Exception,e:
 print "Error!Not base32 encoding!"

 elif operation == 3:
 try:
 print "[+]解密的结果为：%s " % base64_decode(strs)
 except Exception,e:
 print "Error!Not base64 encoding!"

 elif operation == 4:
 try:
 print "[+]解密的结果为：%s " % BubbleBabble_decode(strs)
 except Exception,e:
 print "Error!Not BubbleBabble encoding!"

 elif operation == 5:
 try:
 print "[+]解密的结果为：%s " % url_decode(strs)
  except Exception,e:
 print "Error!Not url encoding!"

 elif operation == 6:
 try:
 print "[+]解密的结果为：%s " % binary_dec(strs)
 except Exception,e:
 print "Error!Not binary encoding!"

 elif operation == 7:
 try:
 print "[+]解密的结果为：%s " % binary_str(strs)
 except Exception,e:
 print "Error!Not binary encoding!"

 elif operation == 8:
 try:
 print "[+]解密的结果为：%s " % quoted_printable_decode(strs)
 except Exception,e:
 print "Error!Not quoted-printable encoding!"

 elif operation == 9:
 try:
 print "[+]解密的结果为：%s " % HtmlParser_decode(strs)
  except Exception,e:
 print "Error!Not HtmlParser encoding!"
 else:
 print "error!"
 decode()


def main():
 print "[1]:加密"
 print "[2]:解密"
 operation = input("请选择：")
 if operation == 1:
 encode()
 elif operation == 2:
 decode()
 else:
 print "error!"
 main()

if __name__ == '__main__':
 main()

import requests
import base64

s =requests.Session()
headers =s.get("http://123.206.87.240:8002/web6/").headers
str1 = base64.b64decode(headers['flag'])
str2 = base64.b64decode(repr(str1).split(':')[1])
data= {'margin':str2}
flag = s.post("http://123.206.87.240:8002/web6/",data=data)
print(flag.text)

from PIL import Image
import re

x = 503 #x坐标 通过对txt里的行数进行整数分解
y = 122 #y坐标 x*y = 行数

im = Image.new("RGB",(x,y))#创建图片
file = open('misc80.txt') #打开rbg值文件

#通过一个个rgb点生成图片
for i in range(0,x):
 for j in range(0,y):
 line = file.readline()#获取一行
 rgb = line.split(",")#分离rgb
 im.putpixel((i,j),(int(rgb[0]),int(rgb[1]),int(rgb[2])))#rgb转化为像素
im.show()

import matplotlib.pyplot as plt
import numpy as np
import matplotlib as mpl

mpl.rcParams['font.family'] = 'sans-serif'
mpl.rcParams['font.sans-serif'] = 'NSimSun,Times New Roman'

x, y = np.loadtxt('1.txt', delimiter=',', unpack=True)
plt.plot(x, y, '.', label='Data', color='black')

plt.xlabel('x')
plt.ylabel('y')
plt.title('Data')
plt.legend()
plt.show()