# Welcome to the Casino

#### Category : misc
#### Points : 125 (98 solves)
#### Author : micpap25

## Challenge
Can you get three-of-a-kind on this slot machine? Let's find out!

`nc misc.bcactf.com 49156`

## Solution
When we connect to the given server, it tells us to send a random lower case alphabet and then spins the Lotto.

It is clear from the challenge description, that the goal is to get 3 same letters in a row after spinning. So, we need to make a script to achieve the same.

Our script first needs to parse the letter that we need to send, send the letter and wait till the flag which starts with `bcactf{` comes. If it doesn't come, then it needs to connect again.

I came up with the following script :
```python
#!/usr/bin/python2
from pwn import *
host = "misc.bcactf.com"
port = 49156
while True:
try:
s = remote(host, port)
except:
continue
print(s.recvuntil("Let's see"))
print(s.recv())
print(s.recv())
key = (s.recv().split('"')[1])
s.sendline(key)
try:
print(s.recvuntil("bcactf"))
print(s.recv())
break
except:
continue

```

Link to the script : [solve.py](https://github.com/p1xxxel/ctf-writeups/blob/main/2021/BCACTF%202.0/Welcome%20to%20the%20Casino/solve.py)
(While running the script, keep in mind it is in python2)

To speed the process, I had to run this script in seven terminals and I got the following flag :

Flag : `bcactf{y0u_g0t_1ucKy_af23dd97g64n}`

#### Further explanation of the script :
It first tries to connect to the server. If it can't connect it keeps retrying.
Then it gets they key to send.
After that it recieves text till `bcactf` and if it doesn't and exception occurs due to which it continues the loop.
If it does recieve `bcactf`, it prints the whole flag and then breaks the loop.

[Original Writeup](https://github.com/p1xxxel/ctf-writeups/tree/main/2021/BCACTF%202.0/Welcome%20to%20the%20Casino)