z3 training

2025/cscg/crypto/intro3/main.py

@@ -1,9 +1,8 @@
 import os
-import struct
 
 BITS = 56
 
-FLAG = os.getenv("FLAG", "CSCG{TESTFLAG}")
+FLAG = os.getenv("FLAG", "CSCG{sH4r1nG_1nt3rn4l_sT4te_1s_d3adLy}")
 
 A = int.from_bytes(os.urandom(BITS//8), "little")
 B = int.from_bytes(os.urandom(BITS//8), "little")
@@ -22,7 +21,8 @@ def main():
     print("Here are some random numbers, now guess the flag")
     rng = gen_random(SEED, BITS, 0xFF)
     for i in range(len(FLAG)):
-        print(next(rng) ^ ord(FLAG[i]))
+        num = next(rng)
+        print(num ^ ord(FLAG[i]))
 
 if __name__ == "__main__":
     main()