From f0613543b22c2b9eea3cc4ffc89ae06181a2a52b Mon Sep 17 00:00:00 2001 From: Michael Chen Date: Fri, 23 Sep 2022 15:36:31 +0200 Subject: [PATCH] Completed challenge 241 --- 241/fixme2.py | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 241/fixme2.py diff --git a/241/fixme2.py b/241/fixme2.py new file mode 100644 index 0000000..c49477d --- /dev/null +++ b/241/fixme2.py @@ -0,0 +1,27 @@ + +import random + + + +def str_xor(secret, key): + #extend key to secret length + new_key = key + i = 0 + while len(new_key) < len(secret): + new_key = new_key + key[i] + i = (i + 1) % len(key) + return "".join([chr(ord(secret_c) ^ ord(new_key_c)) for (secret_c,new_key_c) in zip(secret,new_key)]) + + +flag_enc = chr(0x15) + chr(0x07) + chr(0x08) + chr(0x06) + chr(0x27) + chr(0x21) + chr(0x23) + chr(0x15) + chr(0x58) + chr(0x18) + chr(0x11) + chr(0x41) + chr(0x09) + chr(0x5f) + chr(0x1f) + chr(0x10) + chr(0x3b) + chr(0x1b) + chr(0x55) + chr(0x1a) + chr(0x34) + chr(0x5d) + chr(0x51) + chr(0x40) + chr(0x54) + chr(0x09) + chr(0x05) + chr(0x04) + chr(0x57) + chr(0x1b) + chr(0x11) + chr(0x31) + chr(0x5f) + chr(0x51) + chr(0x52) + chr(0x46) + chr(0x00) + chr(0x5f) + chr(0x5a) + chr(0x0b) + chr(0x19) + + +flag = str_xor(flag_enc, 'enkidu') + +# Check that flag is not empty +if flag == "": + print('String XOR encountered a problem, quitting.') +else: + print('That is correct! Here\'s your flag: ' + flag) + +