| 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) | |