REQ: key for a MUBI film

[ampersand]

Link:

https://mubi.com/en/es/films/the-national-shotgun

I can't seem to get a key for this, I don't know what I'm missing.

Is this the right PSSH:

AAAAMnBzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAABISEBGr2TtlgUfZnETAg3Gy4Gw=

And is this the right license:

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

Maybe it's the custom data but I'm using the same one that passes in Chrome (and I have reloaded the video 10 times and it's always been the same one so I don't think it has an expiration?)

Anyway, if someone can get me the key I'd be grateful.

[stabbedbybrick]

You need to use custom data as only header, and append a missing section to the license:

headers = {
    "Dt-Custom-Data": "TOKEN",
}

License:

https://lic.drmtoday.com/license-proxy-widevine/cenc/?SpecConform=True

[ampersand]

You need to use custom data as only header, and append a missing section to the license:

headers = {
    "Dt-Custom-Data": "TOKEN",
}

License:

https://lic.drmtoday.com/license-proxy-widevine/cenc/?SpecConform=True

no dice, still getting an error. a different one, though:

Traceback (most recent call last):
  File "D:\Utilities\WEB-DL-Tools\Skidatelj\.venv\lib\site-packages\pywidevine\cdm.py", line 388, in parse_license
    signed_message.ParseFromString(license_message)
google.protobuf.message.DecodeError: Error parsing message

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "D:\Utilities\WEB-DL-Tools\Skidatelj\keys.py", line 11, in <module>
    keys = get_keys(
  File "D:\Utilities\WEB-DL-Tools\Skidatelj\helpers\cdm.py", line 29, in get_keys
    cdm.parse_license(session_id, licence.content)
  File "D:\Utilities\WEB-DL-Tools\Skidatelj\.venv\lib\site-packages\pywidevine\cdm.py", line 392, in parse_license
    raise InvalidLicenseMessage(f"Could not parse license_message as a SignedMessage, {e}")
pywidevine.exceptions.InvalidLicenseMessage: Could not parse license_message as a SignedMessage, Error parsing message

[stabbedbybrick]

Invalid LicenseMessage is probably caused by the response being in something other than bytes or b64, most likely JSON. I don't have access to Mubi so I can't check, but if you print out the response.content, you'll see what the response looks like and be able to handle it properly.

[cedric8528]

your key

11abd93b658147d99c44c08371b2e06c:eca26cc41a7d5f8176c8645bb0d105d4

my headers


[Attachment 77100 - Click to enlarge]

[ampersand]

thanks cedric

Invalid LicenseMessage is probably caused by the response being in something other than bytes or b64, most likely JSON. I don't have access to Mubi so I can't check, but if you print out the response.content, you'll see what the response looks like and be able to handle it properly.

Here's the content:

{
   "service_version_info":{
      "license_sdk_version":"18.1.2",
      "license_service_version":"DRMtoday"
   },
   "supported_tracks":[
      {
         "type":"HD",
         "key_id":"DBEA9NrSQWaslDO3MffFQg=="
      }
   ],
   "message_type":"LICENSE_REQUEST",
   "status":"OK",
   "license":"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",
   "platform":"android"
}

yeah, it's json (in a bytestring). am I supposed to extract the "license" property and put it in licence.content?


EDIT: I think that's it.
For whoever might also be having problems:
when dealing with mubi and using pywidevine licence.content is a bytestring containing a JSON string. First you need to decode it to a string, then serialize it into an object or a dictionary, and finally take the "license" property which contains a string and send that string into the parse_license method instead of licence_content.

[stabbedbybrick]

The "license" is the message you need to parse with cdm.parse_license:

cdm.parse_license(session_id, licence.json()["license"])

[ridibunda]

your key

11abd93b658147d99c44c08371b2e06c:eca26cc41a7d5f8176c8645bb0d105d4

my headers


[Attachment 77100 - Click to enlarge]

How do you do that? I am even unable to find PSSH there.

There is KID in the MPD, nothing more. There's no tool left to calculate PSSH from KID. And without PSSH, I end up with nothing.

[cedric8528]

import base64

def get_pssh(keyId):
    array_of_bytes = bytearray( b'\x00\x00\x002pssh\x00\x00\x00\x00')
    array_of_bytes.extend(bytes.fromhex("edef8ba979d64acea3c827dcd51d21ed"))
    array_of_bytes.extend(b'\x00\x00\x00\x12\x12\x10')
    array_of_bytes.extend(bytes.fromhex( keyId.replace("-", "")))
    return base64.b64encode(bytes.fromhex(array_of_bytes.hex()))

kid = input("Please input KID in hex string: ")
kid = kid.replace('-', '')
assert len(kid) == 32 and not isinstance(kid, bytes), "wrong KID length"
print("PSSH {}".format(get_pssh(kid).decode('utf-8')))

[pteque]

There is KID in the MPD, nothing more. There's no tool left to calculate PSSH from KID. And without PSSH, I end up with nothing.

A browser-based tool to generate a Widevine PSSH from a KID:

https://emarsden.github.io/pssh-box-wasm/generate/

[ridibunda]

OK, it was an EME Logger error on my side.

EME Logger didn't give me any init data at first.

After fixing EME Logger, I got a long init data and found PSSH.