suctf2018-babyre

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Xzhah 5月 27, 2018
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suctf2018-babyre @xzh3ha

思路

base64的表被替换了

解题脚本

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# -*- coding: utf-8 -*
from base64 import *        #魔改base64 魔改rc4

b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
table = 'R9Ly6NoJvsIPnWhETYtHe4Sdl+MbGujaZpk102wKCr7/ODg5zXAFqQfxBicV3m8U'


def tb64encode(s):
	tmp = b64encode(s)

	ans = ''

	for i in tmp:
		ans += table[b64.index(i)]
	print ans
	return ans

def tb64decode(s):
	ans = ''
	for i in s:
		ans += b64[table.index(i)]
	print ans
	return b64decode(ans)




ans = 'eQ4y46+VufZzdFNFdx0zudsa+yY0+J2m'

ans = tb64decode(ans)
print ans

flag :SUCTF{wh0_1s_y0ur_d4ddy}