#!/usr/bin/python3

# coded by Arun Kumar Shreevastave - 25 Oct 2016

from bs4 import BeautifulSoup

import os

import requests

from json import JSONDecoder

import base64

from pyDes import *

proxy_ip = ''

# set http_proxy from environment

if('http_proxy' in os.environ):

proxy_ip = os.environ['http_proxy']

proxies = {

'http': proxy_ip,

'https': proxy_ip,

}

# proxy setup end here

headers = {

'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:49.0) Gecko/20100101 Firefox/49.0'

}

base_url = 'http://h.saavncdn.com'

json_decoder = JSONDecoder()

# Key and IV are coded in plaintext in the app when decompiled

# and its preety insecure to decrypt urls to the mp3 at the client side

# these operations should be performed at the server side.

des_cipher = des(b"38346591", ECB, b"\0\0\0\0\0\0\0\0" , pad=None, padmode=PAD_PKCS5)

input_url = raw_input('Enter the song url:').strip()

try:

res = requests.get(input_url, proxies=proxies, headers=headers)

except Exception as e:

print('Error accesssing website error: '+e)

sys.exit()

soup = BeautifulSoup(res.text,"lxml")

# Encrypted url to the mp3 are stored in the webpage

songs_json = soup.find_all('div',{'class':'hide song-json'})

for song in songs_json:

obj = json_decoder.decode(song.text)

print(obj['album'],'-',obj['title'])

enc_url = base64.b64decode(obj['url'].strip())

dec_url = des_cipher.decrypt(enc_url,padmode=PAD_PKCS5).decode('utf-8')

dec_url = base_url + dec_url.replace('mp3:audios','') + '.mp3'

print(dec_url,'\n')