Ciphertext with incorrect length while getting widevine keys

[venixop]

Hi,

I'm trying to download this movie https://www.rtp.pt/play/p11278/o-crime-do-padre-amaro

(use portugal vpn.. for free vpn use urban vpn from chrome web store)

mpd: https://streaming-vod.rtp.pt/drm-dash/nas2.share/pt/h264/512x384/p11278/p11278_1_2023011310999.mp4/manifest.mpd
pssh: AAAAbXBzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAAE0IARIQtX/VAIPoO/2Fu8MaMs9H4RoIY2FzdGxhYnMiJGV5SmhjM05sZEVsa0lqb2lkbTlrWDJOdmJuUmxiblFpZlE9PTIHZGVmYXVsdA==
License: https://lic.drmtoday.com/license-proxy-widevine/cenc/

headers:
import requests

headers = {
    'Accept': '*/*',
    'Accept-Language': 'en-GB,en;q=0.9',
    'Cache-Control': 'no-cache',
    'Connection': 'keep-alive',
    'Origin': 'https://www.rtp.pt',
    'Pragma': 'no-cache',
    'Referer': 'https://www.rtp.pt/',
    'Sec-Fetch-Dest': 'empty',
    'Sec-Fetch-Mode': 'cors',
    'Sec-Fetch-Site': 'cross-site',
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36',
    'sec-ch-ua': '"Chromium";v="110", "Not A(Brand";v="24", "Google Chrome";v="110"',
    'sec-ch-ua-mobile': '?0',
    'sec-ch-ua-platform': '"Windows"',
    'x-dt-custom-data': 'eyJ1c2VySWQiOiJwdXJjaGFzZSIsInNlc3Npb25JZCI6InAwIiwibWVyY2hhbnQiOiJtb2dfcnRwIn0=',
    'Content-Type': 'application/x-www-form-urlencoded',
}

data = '\b\x04'

response = requests.post('https://lic.drmtoday.com/license-proxy-widevine/cenc/', headers=headers, data=data)

im getting this error

Traceback (most recent call last):
  File "C:\Users\err\Downloads\Widevine_Keys-main\widevine_keys\l3.py", line 85, in <module>
    correct, keys = WV_Function(pssh, lic_url)
  File "C:\Users\err\Downloads\Widevine_Keys-main\widevine_keys\l3.py", line 80, in WV_Function
    wvdecrypt.update_license(license_b64)
  File "C:\Users\err\Downloads\Widevine_Keys-main\widevine_keys\wvdecryptcustom.py", line 58, in update_license
    self.cdm.provide_license(self.session, license_b64)
  File "C:\Users\err\Downloads\Widevine_Keys-main\widevine_keys\cdm\cdm.py", line 286, in provide_license
    session.session_key = oaep_cipher.decrypt(license.SessionKey)
  File "C:\Users\err\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\Cryptodome\Cipher\PKCS1_OAEP.py", line 167, in decrypt
    raise ValueError("Ciphertext with incorrect length.")
ValueError: Ciphertext with incorrect length.

it would be great if i can receive help..
thankyou in advance

[naim2007]

Are you ever tried to to search & read some useful thread?
There is already 21 + posts on here answering this issue.

https://forum.videohelp.com/threads/408665-rtlplay-be

[lomero]

on headers delete data, response and keep only x-dt-custom-data value

from lic url put this one:

https://lic.drmtoday.com/license-proxy-widevine/cenc/?specConform=true

and your key:

b57fd50083e83bfd85bbc31a32cf47e1:3d5f6bcf52c213ac76f5b896ee95be4e

[thej911]

on headers delete data, response and keep only x-dt-custom-data value

from lic url put this one:

https://lic.drmtoday.com/license-proxy-widevine/cenc/?specConform=true

and your key:

b57fd50083e83bfd85bbc31a32cf47e1:3d5f6bcf52c213ac76f5b896ee95be4e

Hi ,
I'm beginner and i wanted to know how did you figure out that you should add the param "specConform=true" to the lic url ?

Regards

[venixop]

on headers delete data, response and keep only x-dt-custom-data value

from lic url put this one:

https://lic.drmtoday.com/license-proxy-widevine/cenc/?specConform=true

and your key:

b57fd50083e83bfd85bbc31a32cf47e1:3d5f6bcf52c213ac76f5b896ee95be4e

I tried all possible ways given on this forum. but no luck. im using wks-keys.
I have tested my cdm on 2 websites and it worked.

PSSH: AAAAbXBzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAAE0IARIQtX/VAIPoO/2Fu8MaMs9H4RoIY2FzdGxhYnMiJGV5SmhjM05sZEVsa0lqb2lkbTlrWDJOdmJuUmxiblFpZlE9PTIHZGVmYXVsdA==
License URL: https://lic.drmtoday.com/license-proxy-widevine/cenc/?specConform=true
C:\Users\err\Downloads\WKS-KEYS\pywidevine\L3\cdm\cdm.py:260: RuntimeWarning: Unexpected end-group tag: Not all data was converted
  license.ParseFromString(base64.b64decode(license_b64))
Traceback (most recent call last):
  File "C:\Users\err\Downloads\WKS-KEYS\l3.py", line 25, in <module>
    correct, keys = WV_Function(pssh, lic_url)
  File "C:\Users\err\Downloads\WKS-KEYS\l3.py", line 21, in WV_Function
    wvdecrypt.update_license(license_b64)
  File "C:\Users\err\Downloads\WKS-KEYS\pywidevine\L3\decrypt\wvdecryptcustom.py", line 58, in update_license
    self.cdm.provide_license(self.session, license_b64)
  File "C:\Users\err\Downloads\WKS-KEYS\pywidevine\L3\cdm\cdm.py", line 275, in provide_license
    session.session_key = oaep_cipher.decrypt(license.SessionKey)
  File "C:\Users\err\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\Cryptodome\Cipher\PKCS1_OAEP.py", line 167, in decrypt
    raise ValueError("Ciphertext with incorrect length.")
ValueError: Ciphertext with incorrect length.

[venixop]

Are you ever tried to to search & read some useful thread?
There is already 21 + posts on here answering this issue.

https://forum.videohelp.com/threads/408665-rtlplay-be

ive tried every possible way. but doesnt seem to work

[cedric8528]

Don't forget that you must keep your vpn active when you try to get the keys ....

[venixop]

Don't forget that you must keep your vpn active when you try to get the keys ....

yes it was active

[cedric8528]

look at my headers.py


[Attachment 69356 - Click to enlarge]

[lomero]

I'm beginner and i wanted to know how did you figure out that you should add the param "specConform=true" to the lic url

experience only. this is a bug of l3 with lic.drmtoday
so add that part of code above or also you can edit l3 to work correctly with the real link

https://lic.drmtoday.com/license-proxy-widevine/cenc/

i think it's more easy use the lic url as my post#3

[venixop]

look at my headers.py


[Attachment 69356 - Click to enlarge]

# -*- coding: utf-8 -*-
# Module: KEYS-L3
# Created on: 11-10-2021
# Authors: -∞WKS∞-
# Version: 1.1.0

import base64, requests, sys, xmltodict
import headers
from pywidevine.L3.cdm import cdm, deviceconfig
from base64 import b64encode
from pywidevine.L3.getPSSH import get_pssh
from pywidevine.L3.decrypt.wvdecryptcustom import WvDecrypt

pssh = input('\nPSSH: ')
lic_url = input('License URL: ')

def WV_Function(pssh, lic_url, cert_b64=None):
    wvdecrypt = WvDecrypt(init_data_b64=pssh, cert_data_b64=cert_b64, device=deviceconfig.device_android_generic)                   
    widevine_license = requests.post(url=lic_url, data=wvdecrypt.get_challenge(), headers=headers.headers)
    license_b64 = b64encode(widevine_license.content)
    wvdecrypt.update_license(license_b64)
    Correct, keyswvdecrypt = wvdecrypt.start_process()
    if Correct:
        return Correct, keyswvdecrypt   
correct, keys = WV_Function(pssh, lic_url)

print()
for key in keys:
    print('--key ' + key)

This is the code im running on for reference

[cedric8528]

It's weird...

Your vpn is a classic Vpn and not a vpn via your Browser?

Your L3 Cdm are valid?

[venixop]

It's weird...

Your vpn is a classic Vpn and not a vpn via your Browser?

Your L3 Cdm are valid?

ive dumped l3 cdm from my android and ive used nord vpn.

[thej911]

I'm beginner and i wanted to know how did you figure out that you should add the param "specConform=true" to the lic url

experience only. this is a bug of l3 with lic.drmtoday
so add that part of code above or also you can edit l3 to work correctly with the real link

https://lic.drmtoday.com/license-proxy-widevine/cenc/

i think it's more easy use the lic url as my post#3

thanks a lot for the info mate .

Regards