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26 lines
614 B
26 lines
614 B
import base64
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secret_out = ''
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secret_str = ''.join("gksk-secret-code".split("-"))
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for count, loop in enumerate(secret_str):
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if count % 2 == 0:
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secret_out += ''.join([chr(ord(ch) + 0x3) for ch in loop])
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else:
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secret_out += loop
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print secret_out
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enc = open("flag.enc", "r").read()
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shift_key = 0
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while True:
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shift_key += 1
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cipher = base64.b64decode(enc)
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alphabet = secret_out * 50
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shifted_alphabet = alphabet[shift_key:] + alphabet[:shift_key]
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flag = ''
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for i in range(len(cipher[:-1])):
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flag += chr((ord(cipher[i]) ^ shift_key) - ord(shifted_alphabet[i]))
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if "GKSK{" in flag:
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print flag
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break
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