RPS

rps/sol.py

@@ -0,0 +1,32 @@
+#!/usr/bin/env python
+from pwn import *
+
+wins = 0
+rounds = 0
+
+def play_round(wins):
+    conn.recvuntil(b"exit the program")
+    conn.recvline()
+    conn.sendline(b"1")
+    conn.recvuntil(b"s):")
+    conn.recvline()
+    conn.sendline(b"rock")
+    conn.recvuntil(b"computer played")
+    conn.recvline()
+    result = conn.recvline()
+    if b"You win" in result:
+        return wins+1
+    else:
+        return 0
+
+conn = remote("saturn.picoctf.net", 49891)
+
+p = log.progress("brute-forcing solution")
+while wins < 5:
+    rounds += 1
+    wins = play_round(wins)
+    p.status(f"round {rounds}, wins: {wins}")
+p.success("won 5 rounds")
+
+conn.interactive()
+