非预期解

crypto/Claude_Shannon/crack.py

@@ -0,0 +1,46 @@
+from pwn import * # type: ignore
+# context.log_level = 'debug'
+
+"""
+(这题小小的放了水)
+因为只有一轮,而最终的答案有128种情况,那我们不妨直接猜一个答案
+根据条件概率公式算一下
+
+for i in range(0,1000,100):
+    print(i,":", 1 - (127/128) ** i)
+
+0 : 0.0
+100 : 0.5435690025908804
+200 : 0.7916707446041162
+300 : 0.9049120701701576
+400 : 0.9565989213461966
+500 : 0.9801904023814129
+600 : 0.990958285600675
+700 : 0.9958730812784277
+800 : 0.9981163463716863
+900 : 0.9991402420956556
+大概300次以内都出结果了
+"""
+
+
+
+for i in range(300):
+    try:
+        r = remote("localhost", 10011)
+        # r = process(['python3', 'main.py'])
+        for i in range(15):
+            r.sendlineafter(b":", b"1")
+            r.recvuntil(b"!")
+
+        r.sendlineafter(b"chests:", b"0 0 1 0 0 1 0")
+        r.recvline()
+        flag = r.recvline()
+        if b"flag" in flag:
+            end_time = time.time()
+            print(flag)
+            break
+        else:
+            r.close()
+        
+    except EOFError:
+        pass