ctf系列之杂项之-CTF选手刘华强

拿到压缩包解压得到两张图片，jpeg的使用010editor可以看到最下面有段base64（或者string命令也可以）

解密是

一共136行，到此没办法解密，只能从第二张图片继续查找信息

另外一张图片png 使用stegsolve工具（bule 0）提取出一张二维码，

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

同样base64解密得到

总共16行，猜测可能是0-9 a-f，所以据此对前面的铭文比对，编写脚本得到flag{ece59ea5-3085-4ded-bd72-49f6c9e945a8}

# coding=UTF-8
import binascii
f = open('res.txt','r',encoding='UTF-8').readlines()
t1 = ['有一个人前来买瓜','哥们儿这瓜多少钱一斤啊两块钱一斤','这瓜皮是金子做的还是瓜粒子是金子做的','你瞧瞧现在哪儿有瓜呀这都是大棚的瓜','你嫌贵我还嫌贵呢','这瓜保熟吗','我开水果摊的能卖给你生瓜蛋子','我问你这瓜熟吗','你是故意找茬儿是不是你要不要吧','你这瓜要熟我肯定要啊','十五斤30块','你这哪够十五斤啊你这秤有问题','吸铁石','另外你说的这瓜要是生的你自己吞进去','你他妈劈我瓜是不是','萨日朗']
t2 = '0123456789abcdef'
s = ''
for i in range(len(f)):
    f[i]=f[i].strip()
    for j in range(len(t1)):
        if(f[i]== t1[j]):
            s += t2[j]
            break
print(binascii.a2b_hex(s))