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jacquerie/foobar.py

Last active October 28, 2023 16:09
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How to decode the message at the end of Google Foobar
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foobar.py
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import base64
MESSAGE = '''
EUYQGhMMSx0cU0FIU1MCFAQPG01NQ0gTAEICChUGBxZTRVxBSQoZFQYKHQpKSUNURhcVEgoUFR1I
SltDSBkBTRwKEAgQHxFCSkFJDgkJCgoGCkMLAQBGUklUQhMPAgAJCgYLV0MOSR0VAxAaABZBQVRP
TRICCRVIAk5IEg4dVFRfRkYZBgRARBI=
'''
KEY = 'jacopo.notarstefano'
result = []
for i, c in enumerate(base64.b64decode(MESSAGE)):
result.append(chr(ord(c) ^ ord(KEY[i % len(KEY)])))
print ''.join(result)
@personWithCommonSense
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personWithCommonSense commented Feb 17, 2021 •
edited
Loading

To visualize decode steps, go to following CyberChef recipe:
https://gchq.github.io/CyberChef/#recipe=From_Base64('A-Za-z0-9%2B/%3D',true)XOR(%7B'option':'Latin1','string':'jacopo.notarstefano'%7D,'Standard',false)&input=RVVZUUdoTU1TeDBjVTBGSVUxTUNGQVFQRzAxTlEwZ1RBRUlDQ2hVR0J4WlRSVnhCU1FvWkZRWUtIUXBLU1VOVVJoY1ZFZ29VRlIxSVNsdERTQmtCVFJ3S0VBZ1FIeEZDU2tGSkRna0pDZ29HQ2tNTEFRQkdVa2xVUWhNUEFnQUpDZ1lMVjBNT1NSMFZBeEFhQUJaQlFWUlBUUklDQ1JWSUFrNUlFZzRkVkZSZlJrWVpCZ1JBUkJJPQ

@SakshamWebTeasor
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where can i find the key?

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