PythonChallenge游戏体验7-9

PythonChallenge-7地址 ：
http://www.pythonchallenge.com/pc/def/oxygen.html

题目解析：这里大致意思对图片中的乱码部分进行解析，得出颜色值，然后转换为字母

有关Image库的介绍可以参考：
https://blog.csdn.net/weixin_42160653/article/details/80234856

from PIL import Image
img = Image.open(r'file/07.png')
print(img.format,img.size,img.mode) #输出图片格式、大小、模式(默认为RGB)

li = []
lichr = []
for i in range(629):
    data = img.getpixel((i,45)) # 获取坐标的像素值（R，G，B）
    if data[0] == data[1] ==data[2]:
        li.append(data[0])

for x in li[::7]:  #图片阴影右边有7个像素点没有被遮住
    lichr.append(chr(x))

print(''.join(lichr)) #输出得到的结果

source = [105, 110, 116, 101, 103, 114, 105, 116, 121] #转换后的结果
answer = ''
for y in source:
    answer += ''.join(chr(y))

print(answer)

心得：原来像素也能隐藏答案，类似这样可以考察一些CTF的题目，基本没人会想到这里人

PythonChallenge-8地址 ：
http://www.pythonchallenge.com/pc/def/integrity.html

这里查看源码这里有两串很明显被bz2库压缩后的字符串编码，点击图片的蜜蜂出现一个登录框，显然需要解密这串编码
有关BZ2的介绍如下：
https://www.sohu.com/a/238295842_282074

import  bz2
import requests
un=b'BZh91AY&SYA\xaf\x82\r\x00\x00\x01\x01\x80\x02\xc0\x02\x00 \x00!\x9ah3M\x07<]\xc9\x14\xe1BA\x06\xbe\x084'
pw=b'BZh91AY&SY\x94$|\x0e\x00\x00\x00\x81\x00\x03$ \x00!\x9ah3M\x13<]\xc9\x14\xe1BBP\x91\xf08'

print('The username is: '+ bz2.decompress(un).decode())  
print('The password is: '+ bz2.decompress(pw).decode())

The username is: huge
The password is: file

PythonChallenge-9地址 ：
http://www.pythonchallenge.com/pc/return/good.html

题目解析：源代码提示first+second=?
根据图片的提示，将first和second里面的数，当分别当图像坐标处理，然后将图片连起来

from PIL import Image
first = [146,399,163,403,170,393,169,391,166,386,170,381,170,371,170,355,169,346,167,335,170,329,170,320,170,
310,171,301,173,290,178,289,182,287,188,286,190,286,192,291,194,296,195,305,194,307,191,312,190,316,
190,321,192,331,193,338,196,341,197,346,199,352,198,360,197,366,197,373,196,380,197,383,196,387,192,
389,191,392,190,396,189,400,194,401,201,402,208,403,213,402,216,401,219,397,219,393,216,390,215,385,
215,379,213,373,213,365,212,360,210,353,210,347,212,338,213,329,214,319,215,311,215,306,216,296,218,
290,221,283,225,282,233,284,238,287,243,290,250,291,255,294,261,293,265,291,271,291,273,289,278,287,
279,285,281,280,284,278,284,276,287,277,289,283,291,286,294,291,296,295,299,300,301,304,304,320,305,
327,306,332,307,341,306,349,303,354,301,364,301,371,297,375,292,384,291,386,302,393,324,391,333,387,
328,375,329,367,329,353,330,341,331,328,336,319,338,310,341,304,341,285,341,278,343,269,344,262,346,
259,346,251,349,259,349,264,349,273,349,280,349,288,349,295,349,298,354,293,356,286,354,279,352,268,
352,257,351,249,350,234,351,211,352,197,354,185,353,171,351,154,348,147,342,137,339,132,330,122,327,
120,314,116,304,117,293,118,284,118,281,122,275,128,265,129,257,131,244,133,239,134,228,136,221,137,
214,138,209,135,201,132,192,130,184,131,175,129,170,131,159,134,157,134,160,130,170,125,176,114,176,
102,173,103,172,108,171,111,163,115,156,116,149,117,142,116,136,115,129,115,124,115,120,115,115,117,
113,120,109,122,102,122,100,121,95,121,89,115,87,110,82,109,84,118,89,123,93,129,100,130,108,132,110,
133,110,136,107,138,105,140,95,138,86,141,79,149,77,155,81,162,90,165,97,167,99,171,109,171,107,161,
111,156,113,170,115,185,118,208,117,223,121,239,128,251,133,259,136,266,139,276,143,290,148,310,151,
332,155,348,156,353,153,366,149,379,147,394,146,399]
second = [156,141,165,135,169,131,176,130,187,134,191,140,191,146,186,150,179,155,175,157,168,157,163,157,159,
157,158,164,159,175,159,181,157,191,154,197,153,205,153,210,152,212,147,215,146,218,143,220,132,220,
125,217,119,209,116,196,115,185,114,172,114,167,112,161,109,165,107,170,99,171,97,167,89,164,81,162,
77,155,81,148,87,140,96,138,105,141,110,136,111,126,113,129,118,117,128,114,137,115,146,114,155,115,
158,121,157,128,156,134,157,136,156,136]

img = Image.new('RGBA',(600,600),(255,255,255))

img_array = img.load()
DotColor = (0,0,0)

def xylist(num):   #将first和second里面的数每两个组合成一个坐标
    xli = [x for x in num[::2]]
    yli = [y for y in num[1::2]]
    list = []
    for i in range(len(xli)):
        list.append([xli[i],yli[i]])
    return  list

for i in xylist(first): #画图 
    img_array[int(i[0]),int(i[1])] = DotColor

for i in xylist(second):
    img_array[int(i[0])+400,int(i[1])] = DotColor

img.show()
img.close()

其实看图片好像一头牛，但是还是不知道答案是什么问度娘原来就是bull，恍然大悟，那右边的应该就是一坨屎咯