【愚公系列】2021年11月 攻防世界-进阶题-MISC-059(halo)
作者:互联网
文章目录
一、halo
题目链接:https://adworld.xctf.org.cn/task/task_list?type=misc&number=1&grade=1&page=4
二、答题步骤
1.base64和异或
import string
from base64 import *
b=b64decode("aWdxNDs1NDFSOzFpa1I1MWliT08w")
data=list(b)
for k in range(0,200):
key=""
for i in range(len(data)):
key+=chr(ord(data[i])^k)
print (key)
igq4;541R;1ikR51ibOO0
hfp5:450S:0hjS40hcNN1
kes69763P93kiP73k`MM2
jdr78672Q82jhQ62jaLL3
mcu0?105V?5moV15mfKK4
lbt1>014W>4lnW04lgJJ5
oaw2=327T=7omT37odII6
n`v3<236U<6nlU26neHH7
aoy<3=<9Z39acZ=9ajGG8
`nx=2<=8[28`b[<8`kFF9
cm{>1?>;X1;caX?;chEE:
blz?0>?:Y0:b`Y>:biDD;
ek}8798=^7=eg^9=enCC<
dj|9689<_6<df_8<doBB=
gi:5;:?\5?ge\;?glAA>
fh~;4:;>]4>fd]:>fm@@?
ywa$+%$!B+!y{B%!yr__
xv`%*$% C* xzC$ xs^^!
{uc&)'&#@)#{y@'#{p]]"
ztb'(&'"A("zxA&"zq\\#
}se /! %F/%}F!%}v[[$
|rd!. !$G.$|~G $|wZZ%
qg"-#"'D-'}D#'tYY&
~pf#,"#&E,&~|E"&~uXX'
qi,#-,)J#)qsJ-)qzWW(
p~h-",-(K"(prK,(p{VV)
s}k.!/.+H!+sqH/+sxUU*
r|j/ ./*I *rpI.*ryTT+
u{m(')(-N'-uwN)-u~SS,
tzl)&(),O&,tvO(,tRR-
wyo*%+*/L%/wuL+/w|QQ.
vxn+$*+.M$.vtM*.v}PP/
IGQrIKrIBoo
HFPsHJsHCnn
KESpKIpK@mm
//等等
得到flag :flag{jdr78672Q82jhQ62jaLL3}
总结
- 修改文件头
- crc32值爆破图像宽度
标签:11,进阶,list,base64,MISC,异或,key,data,halo 来源: https://blog.csdn.net/aa2528877987/article/details/121626505