南京邮电大学网络攻防平台(NCTF)-MD5-Writeup

题干如下：

分析：

遍历 TASC?O3RJMV?WDJKX?ZM（？替换为其他），找到md5为e9032???da???08????911513?0???a2形式的即可

---

脚本如下：

 1 import md5
 2 import string
 3 ​
 4 dic = string.ascii_letters + string.digits
 5 ​
 6 for i in dic:
 7     for j in dic:
 8         for k in dic:
 9             s = 'TASC' + i + 'O3RJMV' + j + 'WDJKX' + k + 'ZM'
10             MD5 = md5.md5(s).hexdigest()
11             if MD5[0: 5] == 'e9032':
12                 print 'nctf{' + MD5 + '}'

 

则flag即为nctf{e9032994dabac08080091151380478a2}