[CSAW 2016] Regexpire Writeup

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I thought I found a perfect match but she ended up being my regEx girlfriend.

nc misc.chal.csaw.io 8001

It wasn’t so hard, I asked google for the best way to generate matched string to a given pattern and wrote the following script. The only headache was when my generator used newlines (“\n”) so I removed them.

And after 1000 tests we got the flag: flag{^regularly_express_yourself$}

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