Post challenge on cdrm-project

[Piter]

Hello,

I'm using cdrm-project to retrieve CanalPlus decryption keys.
I enter the PSSH key, the license URL, and headers including the token.

The error message returned by the license server is:
service MDRM, Could not retrieve license: Missing Challenge

How can I find the value of the challenge and how can I post it on cdrm-project ?

Thank you very much for any help you can give me.

[YoBruce45]

Hi,
I am not sure if you can use the cdm-project for C+ (the challenge has to be sent in Base64 and the response is xml, don’t know if cdm-project can cope with this….)

Below you will find the code I used (using pywidevine and adapted for C+ based on the widefrog tool).
You’ll have to:
1) Update your .wvd (see YOUR_DEVICE.wvd")
2) Look for the mpd and extract the pssh (only support until 720p I guess)
3) Find the licence url, make right click in dev tool, copy as bash and post it in curlconverter.com, then update the obtained headers AND the complete licence url in the code (see below, starting with 'https://secure-gen-hapi.canal-plus.com/conso)

import base64, json, os, time, re, requests, xmltodict
from pywidevine.cdm import Cdm
from pywidevine.device import Device
from pywidevine.pssh import PSSH


pssh = "YOUR PSSH"

pssh = PSSH(pssh)
device = Device.load("YOUR_DEVICE.wvd")
cdm = Cdm.from_device(device)
session_id = cdm.open()
challenge = cdm.get_license_challenge(session_id, pssh)

#######################################################
headers = {
PASTE YOUR HEADERS inclusive Token
}

############################################################
licence = requests.post(
'https://secure-gen-hapi.canal-plus.com/conso/…………..,
    headers=headers,
    data=base64.b64encode(challenge).decode(),
)

licence.raise_for_status()
license = xmltodict.parse(licence.content.decode())

cdm.parse_license(session_id, license["licenseresponse"]["clientresponse"]["license"]["#text"])
keys = []
for key in cdm.get_keys(session_id):
    if key.type == 'CONTENT':
        keys.append(f"{key.kid.hex}:{key.key.hex()}")
cdm.close(session_id)

keyString = ""
for key in keys:
    keyString += "--key " + str(key) + " "

print(keyString)

[CMak]

Paid service?

[YoBruce45]

nop, example:

https://www.canalplus.com/divertissement/minecraft-le-film-bonus-1-offert/h/29171780_40099

[cedric8528]

WidevineProxy2 works to get Keys from Canal+


[Attachment 89371 - Click to enlarge]