some small fixes

CTFs_and_WarGames/2014-ASIS-CTF/crypto_paillier/binary_search.py

@@ -0,0 +1,62 @@
+#!/usr/bin/python
+
+__author__ = "bt3gl"
+__email__ = "bt3gl@gmail.com"
+
+
+import decimal
+import socket
+
+
+
+
+def bs_paillier(lo, hi, s):
+    if hi < lo: return None
+    mid = (hi + lo) // 2
+    print("We are at: ")
+    print(mid)
+
+    s.send(b'E')
+    s.recv(4096)
+    s.send(str(mid)[:-1])
+    ans = s.recv(4096)
+
+    if 'None' in ans:
+        print "Found it!"
+        return mid + 1
+    elif 'Your secret' in ans:
+        return bs_paillier(lo, mid-1, s)
+    else:
+        return bs_paillier(mid+1, hi, s)
+
+
+
+
+def get_mod_paillier():
+
+    # create socket, answer first question
+    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    s.connect((HOST, PORT))
+    s.recv(4096)
+    s.send(b'paillier')
+    s.recv(4096)
+
+    # start binary search
+    hi = pow(11,307)
+    lo = pow(10,307)
+    mod = bs_paillier(lo, hi, s)
+    print mod
+
+
+
+if __name__ == "__main__":
+
+    PORT = 12445
+    HOST = 'asis-ctf.ir'
+
+    get_mod_paillier()
+
+
+
+
+