edit old l3.py for new pywidevine

[whs912km]

hi there,

how to edit old l3.py for WKS-KEYS to work with newest pywidevine, latest python 3.12 and new cdm device.wvd ?
now required downgrade protobuf 3.19.5 or use venv ...
here on attach the old l3.py (but i think you all already have it)

[aqzs]

Use a script like this one :

 import logging
from pywidevine.cdm import Cdm
from pywidevine.device import Device
from pywidevine.pssh import PSSH
import httpx

logging.basicConfig(level=logging.DEBUG)
logger = logging.getLogger(__name__)

WVD_PATH = "/home/angela/Programming/WKS-KEYS/device.wvd"
from headers import headers

def get_key(pssh, license_url):
    logger.debug("Loading device...")
    device = Device.load(WVD_PATH)
    cdm = Cdm.from_device(device)
    session_id = cdm.open()
    logger.debug("Session opened...")

    challenge = cdm.get_license_challenge(session_id, PSSH(pssh))
    response = httpx.post(license_url, data=challenge, headers=headers)
    cdm.parse_license(session_id, response.content)

    keys = []
    logger.debug("Retrieving keys...")
    for key in cdm.get_keys(session_id):
        logger.debug(f"Key found: {key.kid.hex}:{key.key.hex()}, Type: {key.type}")
        if key.type == 'CONTENT':
            keys.append(f"--key {key.kid.hex}:{key.key.hex()}")

    cdm.close(session_id)
    logger.debug("Session closed...")
    return "\n".join(keys)

if __name__ == "__main__":
    pssh_str = input("PSSH? ")
    lic_url = input("License URL? ")
    result = get_key(pssh_str, lic_url)
    logger.debug("Result:")
    print(result) 

Source : https://forum.videohelp.com/threads/404994-Decryption-and-the-Temple-of-Doom#post2650297

[A_n_g_e_l_a]

And https://forum.videohelp.com/threads/411862-Beyond-WKS-KEYS has more information about making the transition together with an updated L3.py. But plain old L3 is now replaced by allhell3.py see my signature.

[whs912km]

thanks aqzs for your edited script version. i can try soon

@Angela
yes i know allhell3.py your script work fine. but need copy from lic url as curl bash value, so need to play video on browser
the old l3.py only is more convenient when someone share data only like pssh and lic url
i know your thread, and i also posted some comments (now all work fine!)

now i can test the new edited l3.py

[whs912km]

oh yes aqzs, your edited version work fine! wonderful

this only: how to hide (not print) debug information ? but key only, like old l3.py

[whs912km]

solved

replace level=logging.WARNING instead level=logging.DEBUG

[whs912km]

ok guys now i need to take a step forward
from some link like that https://mediasetinfinity.mediaset.it/movie/benvenutialsud/benvenuti-al-sud_F301623001000101
the pssh is inside the mpd from <cenc>. so, instead of manually searching pssh from mpd is there a way to have the script search for it ?

my goal is have an l3_edited.py script v2 to add lic url only for those sites (like the link above) that have a pssh contained on mpd

[Obo]

Sure. In my old script I have these two functions:

def filter_pssh(pssh_list: list, systemid: PSSH.SystemId):
    for item in pssh_list:
        pssh = PSSH(item)
        if pssh.system_id == systemid:
            return pssh
    return None

def get_pssh(mpd_url, headers):
    r = requests.get(url=mpd_url, headers=headers)
    r.raise_for_status()
    pssh_list = re.findall(
        r'<cenc:pssh\b[^>]*>(.*?)</cenc:pssh>',
        r.text)
    return filter_pssh(pssh_list, PSSH.SystemId.Widevine)

[A_n_g_e_l_a]

ok guys now i need to take a step forward
...
the pssh is inside the mpd from <cenc>. so, instead of manually searching pssh from mpd is there a way to have the script search for it ?
....

Did you ever consider that the scripts you use for downloading and decrypting, already will have methods inside to find the pssh and the license URL? Just read what you have, and see how others have found solutions.

[whs912km]

thanks Obo for your tip. i can try soon

@Angela
i don't you understand ... from script above (with DEBUG infos) the pssh is required at script start ... i think need to be add lines as suggested by Obo in the script

[A_n_g_e_l_a]

thanks Obo for your tip. i can try soon

@Angela
i don't you understand ... from script above (with DEBUG infos) the pssh is required at script start ... i think need to be add lines as suggested by Obo in the script

You are trying to do something which has been done already by people before you. Look at their work. Find an all in one downloader and load the script into a text editor and read it. See how others capture a pssh.

What's not to to understand? Or use Obo's method if you wish - without doing any thinking.

But what will you next be asking for help capturing? The license?

Strive to be an independent learner by using what is already around you. You'll have no need to use VH as a live AI engine to question, if you look through published solutions instead. Use your head is the message!

[aqzs]

now I would like another version that requires mpd and lic url (and get pssh from mpd) like my request here
https://forum.videohelp.com/threads/415422-edit-old-l3-py-for-new-pywidevine#post2744695

Use a script like this one :

from pywidevine.cdm import Cdm
from pywidevine.device import Device
from pywidevine.pssh import PSSH
import requests
import xml.etree.ElementTree as ET

def getpssh(url_mpd):
    psshs = []
    response = requests.get(url_mpd)
    root = ET.fromstring(response.content)
    for i in range(20):
        for j in range(20):
            for k in range(20):
                for l in range(20):
                    try:
                        if root[i][j][k][l].text not in psshs and len(root[i][j][k][l].text) > 70 and len(root[i][j][k][l].text) < 190:
                            psshs.append(root[i][j][k][l].text)
                    except:
                        pass
    for pssh in psshs:
        return pssh
    
#
# enter special header values here  in the form  'token':  ' value',   each on one line -  remember the quotes and the comma!
headers = {
    'Accept': '*/*',
}

# prepare pssh
mpd_url = input("MPD URL? ")
pssh = getpssh(mpd_url)
pssh = PSSH(pssh)
lic_url = input("License URL? ")

# load device
# for example
#device = Device.load(r"/home/angela/Programming/WKS-KEYS/pywidevine/L3/cdm/devices/emulator_1/WVD/google_aosp_on_ia_emulator_14.0.0_xxxxxc_4464_l3.wvd")
device = Device.load(r"<enter your path to the wvd file you have created, here>")

# load cdm
cdm = Cdm.from_device(device)

# open cdm session
session_id = cdm.open()

# get license challenge
challenge = cdm.get_license_challenge(session_id, pssh)

# send license challenge (assuming a generic license server SDK with no API front)
licence = requests.post(lic_url, headers = headers, data=challenge)
licence.raise_for_status()

# parse license challenge
cdm.parse_license(session_id, licence.content)

# print keys
for key in cdm.get_keys(session_id):

    if key.type=='CONTENT':
        print(f"\n--key {key.kid.hex}:{key.key.hex()}")

# close session, disposes of session data
cdm.close(session_id)

[whs912km]

thanks a lot aqzs, i can test now your script

edit: wonderful, your script work fine. thanks again for your help aqzs