猪圈密码

题源：i春秋  crypto-小心猪圈

题目内容：
R29kIGpvYjo1NzY1NkM2QzIwNjQ2RjZFNjUzQTRBMzU1ODQ3NTkzNjRBNDE0RTM1NTg0NzRCNDk0NDU0NEY1MjUzNTg0MTQ5NDQ0MjRGMzU1MTU4NTM0RjUzNTI0NzQ5MzQ1ODRCNTc1MjU0NEE0QTU1NDc0OTUzNDM1NzRGNEU0RDU2NTE1NTU0NTE0RDQ5NUE0NDRCMzY1MzUwNEU1NTM0NTc1NTU5NEM0RjQ5NDkzMzU3NEIzMzRDNTU0RjQyNTI1NzMyMzQ0MjU0NEQ0QTRDNTQ1MTM1NDQ0MzQ3NEEzNDQ4NDc1OTRDNEE0NzQ2MzI1NzQ1NTYzMzU5NDc0RTQ3NDY0RjM0NDQ1NzRENTY0NDU3NTczNTQ0NDU0OTM0NTk1ODRENTk1MzQ4NDc1NjM0NTc0NTMzNEE1QTQ3NDI1MzQ3MzI0RDRDMzI0RDVBNDk1NDMyNTA0OTNE

解密：

首先观察base64编码：

import base64
a="R29kIGpvYjo1NzY1NkM2QzIwNjQ2RjZFNjUzQTRBMzU1ODQ3NTkzNjRBNDE0RTM1NTg0NzRCNDk0NDU0NEY1MjUzNTg0MTQ5NDQ0MjRGMzU1MTU4NTM0RjUzNTI0NzQ5MzQ1ODRCNTc1MjU0NEE0QTU1NDc0OTUzNDM1NzRGNEU0RDU2NTE1NTU0NTE0RDQ5NUE0NDRCMzY1MzUwNEU1NTM0NTc1NTU5NEM0RjQ5NDkzMzU3NEIzMzRDNTU0RjQyNTI1NzMyMzQ0MjU0NEQ0QTRDNTQ1MTM1NDQ0MzQ3NEEzNDQ4NDc1OTRDNEE0NzQ2MzI1NzQ1NTYzMzU5NDc0RTQ3NDY0RjM0NDQ1NzRENTY0NDU3NTczNTQ0NDU0OTM0NTk1ODRENTk1MzQ4NDc1NjM0NTc0NTMzNEE1QTQ3NDI1MzQ3MzI0RDRDMzI0RDVBNDk1NDMyNTA0OTNE"
print(base64.b64decode(a.encode()))

b'God job:57656C6C20646F6E653A4A35584759364A414E3558474B4944544F525358414944424F355158534F5352474934584B5752544A4A5547495343574F4E4D56515554514D495A444B3653504E55345755594C4F494933574B334C554F425257323442544D4A4C5451354443474A344847594C4A4746325745563359474E47464F3444574D56445757354445493459584D5953484756345745334A5A47425347324D4C324D5A49543250493D'

然后是base16编码：

b="57656C6C20646F6E653A4A35584759364A414E3558474B4944544F525358414944424F355158534F5352474934584B5752544A4A5547495343574F4E4D56515554514D495A444B3653504E55345755594C4F494933574B334C554F425257323442544D4A4C5451354443474A344847594C4A4746325745563359474E47464F3444574D56445757354445493459584D5953484756345745334A5A47425347324D4C324D5A49543250493D"
print(base64.b16decode(b.encode()))

4 b'Well done:J5XGY6JAN5XGKIDTORSXAIDBO5QXSOSRGI4XKWRTJJUGISCWONMVQUTQMIZDK6SPNU4WUYLOII3WK3LUOBRW24BTMJLTQ5DCGJ4HGYLJGF2WEV3YGNGFO4DWMVDWW5DEI4YXMYSHGV4WE3JZGBSG2ML2MZIT2PI='

再然后是base32编码：

c="J5XGY6JAN5XGKIDTORSXAIDBO5QXSOSRGI4XKWRTJJUGISCWONMVQUTQMIZDK6SPNU4WUYLOII3WK3LUOBRW24BTMJLTQ5DCGJ4HGYLJGF2WEV3YGNGFO4DWMVDWW5DEI4YXMYSHGV4WE3JZGBSG2ML2MZIT2PI="
print(base64.b32decode(c.encode()))

b'Only one step away:Q29uZ3JhdHVsYXRpb25zOm9janB7emtpcmp3bW8tb2xsai1ubWx3LWpveGktdG1vbG5ybm90dm1zfQ=='

再然后是base64编码：

d="Q29uZ3JhdHVsYXRpb25zOm9janB7emtpcmp3bW8tb2xsai1ubWx3LWpveGktdG1vbG5ybm90dm1zfQ=="
print(base64.b64decode(d.encode()))

b'Congratulations:ocjp{zkirjwmo-ollj-nmlw-joxi-tmolnrnotvms}'

最后一步：猪圈密码

 

flag{vbriasdf-fcca-edcs-aftr-xdfceiefxzdw}