ångstromCTF 2021: Revex

Revex

Category: Rev

75 points

As an active reddit user, clam frequently browses r/ProgrammerHumor. However, the reposts about how hard regex is makes him go >:((((. So, clam decided to show them who’s boss.

^(?=.*re)(?=.{21}[^_]{4}\}$)(?=.{14}b[^_]{2})(?=.{8}[C-L])(?=.{8}[B-F])(?=.{8}[^B-DF])(?=.{7}G(?<pepega>..).{7}t\k<pepega>)(?=.*u[^z].$)(?=.{11}(?<pepeega>[13])s.{2}(?!\k<pepeega>)[13]s)(?=.*_.{2}_)(?=actf\{)(?=.{21}[p-t])(?=.*1.*3)(?=.{20}(?=.*u)(?=.*y)(?=.*z)(?=.*q)(?=.*_))(?=.*Ex)

Author: aplet123

Solution

With a bit of help from Regex101 ;-)

regex101

Flag

actf{reGEx_1s_b3stEx_qzuy}

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