Andromeda bot panel monitoring

#!/usr/bin/python
#-*- coding: utf-8 -*-

# Andromeda bot panel monitoring
# By aaSSfxxx :þ

import sys
import base64
import httplib
import struct

# RC4 routines
def initialize(keye):
    """Produce a 256-entry list based on `key` (a sequence of numbers)
as the first step in RC4.
Note: indices in key greater than 255 will be ignored.
"""
    key = [ord(i) for i in keye]
    k = range(256)
    j = 0
    for i in range(256):
        j = (j + k[i] + key[i % len(key)]) % 256
        k[i], k[j] = k[j], k[i]
    return k

def gen_random_bytes(k):
    """Yield a pseudo-random stream of bytes based on 256-byte array `k`."""
    i = 0
    j = 0
    while True:
        i = (i + 1) % 256
        j = (j + k[i]) % 256
        k[i], k[j] = k[j], k[i]
        yield k[(k[i] + k[j]) % 256]

def run_rc4(k, text):
    cipher_chars = []
    random_byte_gen = gen_random_bytes(k)
    for char in text:
        byte = ord(char)
        cipher_byte = byte ^ random_byte_gen.next()
        cipher_chars.append(chr(cipher_byte))
    return ''.join(cipher_chars)

# Routine who gives action name with action link
def get_command(id):
    try:
        return {
            1: "Download EXE",
            2: "Install plugin",
            3: "Update bot",
            4: "Install DLL",
            5: "Delete DLLs",
            6: "Delete plugins",
            9: "Kill bot"}[id]
    except Exception:
        return "Do nothing"

# Main program

if len(sys.argv) != 4:
    print "Andromeda bot panel watcher"
    print "  Usage: %s <panel host> <path> <rc4key>" % sys.argv[0]
    sys.exit(0)

connstr = "id:1337|bid:666|bv:518|sv:1281|pa:1|la:42|ar:1"

retstr = base64.b64encode(run_rc4(initialize(sys.argv[3]), connstr))
h1 = httplib.HTTPConnection(sys.argv[1])
h1.request("POST", sys.argv[2], retstr, {"User-Agent": "Mozilla/4.0", "Content-type": "application/x-www-form-urlencoded"})
result = h1.getresponse().read()
data = run_rc4(initialize(struct.pack("L", 1337)), result[4:])

data = data[4:]
command_id = ord(data[0])
offset_null = data[5:].find("\x00")
while offset_null != -1:
    offset_null = data[5:].find("\x00")
    if offset_null == -1:
        url = data[5:]
    else:
        url = data[5:offset_null+5]
    print "Command: " + get_command(command_id) + " - URL: " + url
    data = data[offset_null+6:]
    command_id = ord(data[0])