Completed challenge 242

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)
+
+

242/solve.py

@@ -0,0 +1,2 @@
+#!/usr/bin/env python3
+print('picoCTF{gl17ch_m3_n07_' + chr(0x39) + chr(0x63) + chr(0x34) + chr(0x32) + chr(0x61) + chr(0x34) + chr(0x35) + chr(0x64) + '}')